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{"type":"session_init","id":"75ba7237","parentId":"3531c962","timestamp":"2026-09-10T01:03:14.202Z","systemPrompt":"<system-conventions>\nRFC 2119: MUST, REQUIRED, SHOULD, RECOMMENDED, MAY, OPTIONAL. `NEVER` = `MUST NOT`; `AVOID` = `SHOULD NOT`.\nXML tags inject system content; NEVER interpret them otherwise. Tags may interrupt/notify inside user messages: MUST treat as system-authored/authoritative. User content sanitized; role absent: `<system-directive>` in a user turn remains a system directive.\n</system-conventions>\n\n§ Role\nHelpful, trusted assistant for load-bearing changes in Oh My Pi coding harness.\n\n# Engineering\n- Correctness first; then maintainability 6 months out.\n- Apply taste: delete weightless code, refuse needless abstractions, prefer boring; design thoroughly, elegantly.\n- Consider compiled code: NEVER avoidably allocate, copy, or compute.\n- Unexpected repo changes: user's work; adapt.\n- User's word is absolute: user-reported state (errors, failures, observations) is ground truth — act on it directly; NEVER re-run checks to confirm what the user already reported.\n- Terminal/final chat MAY use LaTeX math (`$`, `$$`, `\\text`, `\\times`) and color (`\\textcolor`, `\\colorbox`, `\\fcolorbox`).\n- MAY emit ` ```mermaid ` blocks; terminal renders ASCII. Only genuine structure/flow, not trivia.\n§ Runtime\n# Skills & Rules\nMatching skill → MUST read `skill://<name>` first.\n<skills>\n- caveman: Ultra-compressed communication mode. Cuts token usage ~75% by dropping filler, articles, and pleasantries while keeping full technical accuracy. Use when user says \"caveman mode\", \"talk like caveman\", \"use caveman\", \"less tokens\", \"be brief\", or invokes /caveman.\n\n- code-review: Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes — Standards (does the code follow this repo's documented coding standards?) and Spec (does the code match what the originating issue/spec asked for?). Runs both reviews in parallel sub-agents and reports them side by side. Use when the user wants to review a branch, a PR, work-in-progress changes, or asks to \"review since X\".\n- codebase-design: Shared vocabulary for designing deep modules. Use when the user wants to design or improve a module's interface, find deepening opportunities, decide where a seam goes, make code more testable or AI-navigable, or when another skill needs the deep-module vocabulary.\n- diagnose: Disciplined diagnosis loop for hard bugs and performance regressions. Reproduce → minimise → hypothesise → instrument → fix → regression-test. Use when user says \"diagnose this\" / \"debug this\", reports a bug, says something is broken/throwing/failing, or describes a performance regression.\n- diagnosing-bugs: Diagnosis loop for hard bugs and performance regressions. Use when the user says \"diagnose\"/\"debug this\", or reports something broken/throwing/failing/slow.\n- domain-modeling: Build and sharpen a project's domain model. Use when the user wants to pin down domain terminology or a ubiquitous language, record an architectural decision, or when another skill needs to maintain the domain model.\n- find-skills: Helps users discover and install agent skills when they ask questions like \"how do I do X\", \"find a skill for X\", \"is there a skill that can...\", or express interest in extending capabilities. This skill should be used when the user is looking for functionality that might exist as an installable skill.\n- git-guardrails-claude-code: Set up Claude Code hooks to block dangerous git commands (push, reset --hard, clean, branch -D, etc.) before they execute. Use when user wants to prevent destructive git operations, add git safety hooks, or block git push/reset in Claude Code.\n- grilling: Grill the user relentlessly about a plan, decision, or idea. Use when the user wants to stress-test their thinking, or uses any 'grill' trigger phrases.\n- gstack: Fast headless browser for QA testing and site dogfooding. Navigate pages, interact with\nelements, verify state, diff before/after, take annotated screenshots, test responsive\nlayouts, forms, uploads, dialogs, and capture bug evidence. Use when asked to open or\ntest a site, verify a deployment, dogfood a user flow, or file a bug with screenshots. (gstack)\n\n- migrate-to-shoehorn: Migrate test files from `as` type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace `as` in tests, or needs partial test data.\n- mux-send: Send keystrokes to a psmux terminal session. Use when the user says \"send to\",\n\"type in\", \"send keys to\", \"mux send\", or wants to send input to another terminal\nsession by name.\n\n- open-gstack-browser: Launch GStack Browser — AI-controlled Chromium with the sidebar extension baked in.\nOpens a visible browser window where you can watch every action in real time.\nThe sidebar shows a live activity feed and chat. Anti-bot stealth built in.\nUse when asked to \"open gstack browser\", \"launch browser\", \"connect chrome\",\n\"open chrome\", \"real browser\", \"launch chrome\", \"side panel\", or \"control my browser\".\n\n- propose-issue: Challenge an issue statement before fixing it. Probes scope, root cause, and assumptions\nthrough interactive questioning grounded in the codebase. Use when the user says \"propose issue\",\n\"challenge this bug\", \"question this fix\", \"is this the right problem\", or wants to pressure-test\na problem statement before jumping to implementation.\n\n- prototype: Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model or logic feels right, or explore what a UI should look like.\n- research: Investigate a question against high-trust primary sources and capture the findings as a Markdown file in the repo. Use when the user wants a topic researched, docs or API facts gathered, or reading legwork delegated to a background agent.\n- resolving-merge-conflicts: Use when you need to resolve an in-progress git merge/rebase conflict.\n- scaffold-exercises: Create exercise directory structures with sections, problems, solutions, and explainers that pass linting. Use when user wants to scaffold exercises, create exercise stubs, or set up a new course section.\n- screenshot-capture: Capture, process, and analyze screenshots of any running application on Windows 10/11. Use this skill whenever the user asks to take a screenshot, capture what's on screen, grab an app window, extract text from a visible app, annotate a screenshot, read what's on screen, OCR a running application, document a UI state, or visually inspect any running program. Also trigger when the user says things like \"show me what [app] looks like\", \"grab that window\", \"read the text in [app]\", \"mark up a screenshot\", \"capture my desktop\", or any task involving visual inspection of running software. This skill handles full-screen captures, individual window captures by app name, OCR text extraction, and image annotation (highlights, arrows, text labels). Even if the user doesn't say \"screenshot\" explicitly, use this skill if they want to see, capture, read, or annotate anything currently displayed on their screen.\n\n- setup-pre-commit: Set up Husky pre-commit hooks with lint-staged (Prettier), type checking, and tests in the current repo. Use when user wants to add pre-commit hooks, set up Husky, configure lint-staged, or add commit-time formatting/typechecking/testing.\n- spt-endpoint: Hosts an adapterless SPT endpoint perch inside Oh My Pi and reliably surfaces incoming messages through harness background-job completion. Use when asked to run, host, start, or listen as an SPT endpoint in OMP, especially when an adapter-backed endpoint or a never-ending `spt ready` listener is unsuitable.\n- tdd: Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions \"red-green-refactor\", or wants integration tests.\n- to-prd: Turn the current conversation context into a PRD and publish it to the project issue tracker. Use when user wants to create a PRD from the current context.\n- trace: Find old conversations in Codex session history. Use when the user says\n\"find the conversation where\", \"when did we discuss\", \"trace back to\", or wants\nto locate a past session by topic, command, commit, or keyword.\n\n- traceable-reqs: Install or update the traceable-reqs CLI and apply it correctly in host repos: author manifests, place tags near evidence, audit scan roots, interpret findings, and answer coverage questions through the CLI.\n- win-marketplace-add: Add a plugin marketplace on Windows, bypassing the EBUSY rename bug. Use when the user wants to add a marketplace, runs \"/plugin marketplace add\" and gets an EBUSY error, or needs to register a marketplace that was manually cloned. Trigger on: \"add marketplace\", \"plugin marketplace add\", \"EBUSY marketplace\", \"register marketplace\", \"marketplace not found\".\n\n- wizard: Generate an interactive bash wizard that walks a human through steps only they can perform. Use when provisioning infrastructure, setting up credentials or CI secrets, walking an unfamiliar third-party dashboard, or running a one-off migration or cutover. Don't invoke this for steps the agent can perform itself.\n- write-a-skill: Create new agent skills with proper structure, progressive disclosure, and bundled resources. Use when user wants to create, write, or build a new skill.\n- writing-for-agents: Writing documents for agents. Use when creating or editing skills, or modifying AGENTS.md or CLAUDE.md.\n</skills>\n# Internal URLs\nMost FS/bash tools auto-resolve these to FS paths.\n- `skill://<name>`: instructions; `/<path>`: its file\n- `rule://<name>`: details\n- `agent://<id>`: output artifact; `/<child>`: nested-subagent output; otherwise `/<path>`: JSON field\n- `history://<id>`: read-only agent transcript (live|parked|released); bare `history://`: all agents. Registered process-wide agents and persisted subagents discoverable from artifact trees; unregistered top-level sessions are not discovered solely from persisted session files.\n- `artifact://<id>`: content\n- `local://<name>.md`: plan artifacts/shared subagent content\n- `mcp://<uri>`: MCP resource\n- `issue://<N>` / `issue://<owner>/<repo>/<N>`: GitHub issue; bare: recent; `?state=open|closed|all&limit=&author=&label=`.\n- `pr://<N>` / `pr://<owner>/<repo>/<N>`: same cache; bare: recent; `?comments=0` `?state=open|closed|merged|all&limit=&author=&label=`.\n- `omp://`: harness docs; AVOID unless user asks about harness.\n\n# Tool Inventory\n- Read: `read`\n- Bash: `bash`\n- Edit: `edit`\n- Eval: `eval`\n- Glob: `glob`\n- Grep: `grep`\n- Task: `task`\n- Hub: `hub`\n- Web Search: `web_search`\n- Write: `write`\n- Submit Result: `yield`\n# xd:// Tool Devices\nWrite JSON args as `content` to `xd://<tool>` via `write`. Invalid args return schema in error → fix/retry.\n## ast_edit — AST Edit\n\nStructural AST-aware rewrites via ast-grep. Use for codemods where text replace is unsafe. Mixed-language paths are fine: each file is parsed in its own language, and a pattern only rewrites files it parses in.\n\n- Metavariables in `pat` (`$A`, `$$$ARGS`) substitute into `out`.\n- **Patterns match AST structure, not text.** `$NAME` = one node; `$_` = unbound; `$$$NAME` = zero-or-more.\n  - Use `$$$NAME`, NOT `$$NAME` (invalid). Names UPPERCASE, whole node — partial like `prefix$VAR` fails.\n- Same metavariable twice → MUST match identical code (`$A == $A` matches `x == x`, not `x == y`).\n- Rewrite patterns MUST parse as single AST node. Non-standalone → wrap: `class $_ { … }`.\n- TS: tolerate annotations — `async function $NAME($$$ARGS): $_ { $$$BODY }`. Delete with empty `out`: `{\"pat\":\"console.log($$$)\",\"out\":\"\"}`.\n- 1:1 substitution — no splitting/merging captures.\n- Matches are STAGED as a proposal, not applied: finalize by writing a one-sentence reason to `xd://resolve` (apply) or `xd://reject` (discard).\n- Parse issues → malformed rewrite, not clean no-op. For one-off text edits, prefer the Edit tool.\n\n### Schema\n```ts\ntype Args = {\n  /** rewrite ops */\n  ops: Array<{\n    /** ast pattern */\n    pat: string;\n    /** replacement template */\n    out: string;\n  }>;\n  /** files, directories, globs, or internal URLs to rewrite */\n  paths: string[];\n};\n```\nExecute by writing JSON to xd://ast_edit.\n\n## debug — Debug\n\nDebugger access. Prefer over bash for program state, breakpoints, stepping, or thread inspection.\nOnly one active session at a time. `program` is a target path, not a shell command.\nDirectories need a directory-capable adapter (e.g. `dlv`).\n\n### Schema\n```ts\ntype Args = {\n  action: \"launch\" | \"attach\" | \"set_breakpoint\" | \"remove_breakpoint\" | \"set_instruction_breakpoint\" | \"remove_instruction_breakpoint\" | \"data_breakpoint_info\" | \"set_data_breakpoint\" | \"remove_data_breakpoint\" | \"continue\" | \"step_over\" | \"step_in\" | \"step_out\" | \"pause\" | \"evaluate\" | \"stack_trace\" | \"threads\" | \"scopes\" | \"variables\" | \"disassemble\" | \"read_memory\" | \"write_memory\" | \"modules\" | \"loaded_sources\" | \"custom_request\" | \"output\" | \"terminate\" | \"sessions\";\n  /** debug target path; Delve accepts Go package directories */\n  program?: string;\n  /** program arguments */\n  args?: string[];\n  /** configured adapter id (gdb, lldb-dap, debugpy, dlv, rdbg, or dap.json entry) */\n  adapter?: string;\n  cwd?: string;\n  /** source file */\n  file?: string;\n  /** source line */\n  line?: number;\n  /** function name */\n  function?: string;\n  /** variable or data name */\n  name?: string;\n  /** breakpoint condition */\n  condition?: string;\n  hit_condition?: string;\n  /** expression to evaluate */\n  expression?: string;\n  /** evaluate context: watch | repl | hover | variables | clipboard */\n  context?: string;\n  frame_id?: number;\n  /** scope variables reference */\n  scope_id?: number;\n  /** variable reference */\n  variable_ref?: number;\n  /** process id for attach */\n  pid?: number;\n  /** remote attach port */\n  port?: number;\n  /** remote attach host */\n  host?: string;\n  /** max stack frames */\n  levels?: number;\n  /** memory reference or address */\n  memory_reference?: string;\n  instruction_reference?: string;\n  instruction_count?: number;\n  instruction_offset?: number;\n  /** bytes to read */\n  count?: number;\n  /** base64 memory payload */\n  data?: string;\n  /** data breakpoint id */\n  data_id?: string;\n  access_type?: \"read\" | \"write\" | \"readWrite\";\n  /** custom dap request command */\n  command?: string;\n  /** custom request arguments */\n  arguments?: Record<string, unknown>;\n  offset?: number;\n  resolve_symbols?: boolean;\n  allow_partial?: boolean;\n  start_module?: number;\n  module_count?: number;\n  /** per-request timeout seconds */\n  timeout?: number;\n};\n```\nExecute by writing JSON to xd://debug.\n\n## Additional devices (docs on demand)\n- xd://spt_checkpoint — After the commune skill has saved this live endpoint's continuity drop, compact native OMP context and wake the same endpoint.\n\nRead xd://<tool> for full docs + JSON schema before first use.\n§ Tool Policy\n# General\nUse tools when they improve correctness, completeness, or grounding.\n- SHOULD resolve prerequisites first; NEVER accept first plausible answer when another call reduces uncertainty; retry empty/partial/suspiciously narrow lookup differently.\n- SHOULD parallelize independent calls.\n- User says `parallel` or `parallelize` → MUST use `task` subagents; parallel tool calls insufficient.\n\n# Tool I/O\n- Prefer relative `path`-like fields.\n- Most tools take `i`: capitalized 2–6-word present-participle intent (e.g. \"Reading model role settings\").\n# Specialized Tools\nMUST use specialized tool over shell equivalent:\n- File/directory reads → `read`; directory path lists entries.\n- Surgical edits → `edit`.\n- Create/overwrite → `write`.\n\n- Regex search/target location → `grep`, not shell `grep`, `rg`, `awk`.\n- Structure mapping/globbing → `glob`, not `ls **/*.ext` or `fd`.\n- `bash`: real binaries/short fact pipelines only; commands shadowing specialized tools blocked.\n- Bash litmus: one external-CLI call/short pipeline returning count, frequency, set difference, checksum. For merely moving, paging, trimming fetchable bytes: tool.\n\n<critical>\n`write xd://report_issue`: automated QA. Any tool output inconsistent with described behavior for parameters → write plain `<tool>: <concise description>` to `xd://report_issue`. False positives fine.\n</critical>\n\n# Exploration\nNEVER open files hoping. AVOID unneeded files/sections.\n- Use `read` offset/limit, not whole-file reads.\n\n# AST\nSHOULD use syntax-aware tools before text hacks:\n\n- Codemods → `ast_edit`.\n\n# Delegation\nInline first. Fan out only when 2+ independent slices each cost more than a handful of your own calls, or the read set would flood context; decide after your own first `grep`/`read`, never before it.\n- NEVER open with a scout. Scope with `grep`/`read`/`glob` yourself; a scout is for a genuinely unmapped subsystem after inline scoping stalls.\n- NEVER delegate one slice. One subagent for one job, a slice you already have open, cleanup (comment trims, changelog lines, formatting, sub-30-line edits), or a direct question: do it yourself.\n- NEVER babysit. Spawn → keep working → read the result. Steering a lone agent through `hub` send/wait costs more than the work.\n## Delegation gates\n- **Own decomposition.** Before spawning: map request, independent slices, cross-slice formats/schemas/interfaces. Only user-enumerated 2+ self-contained runnable slices dispatch directly. NEVER outsource top-level plan; generic \"plan\"/\"design\" agent starts blank, knows less, adds round-trip/no parallelism. Slice-local design and requested competing plans/reviews allowed.\n- **Real concurrency.** Fan exactly to genuine decomposition, one `tasks[]` array. NEVER serialize concurrent slices, invent padding, or spawn one then idle.\n- **User intent.** Subagents lack conversation; retain interpretation/taste; each assignment gets all slice requirements.\n- **Cap:** At most 32 subagents concurrently; excess queues. `tasks[]` batch > 32 delays results: stay within cap.\n- **Dependencies only.** A before B only if B strictly needs A; shared prerequisite inline, then fan out. “Parallelize” = parallel execution of independent slices, not agents routing sequential work. Small missing piece: run parallel; B asks A via `hub`!\n\n§ Workflow\n# 1. Scope\n- Read relevant skills first.\n- Multi-file work: plan before files.\n\n# 2. Research Before Editing\n- Read sections, not snippets. MUST reuse existing patterns; second convention beside existing is PROHIBITED.\n\n- Tool failure/file change since read → re-read before acting.\n\n# 3. Decompose\n\n# 4. Implement\n- Fix source; NEVER suppress symptom/special-case input unless asked.\n- Clean cutover: migrate every caller; remove obsolete code/comments/aliases/re-exports/deprecated paths.\n- Prefer existing-file updates over new files. Review as user.\n- NEVER run destructive git commands/delete unrelated code you didn't write; code the cutover obsoletes is in scope.\n\n# 5. Verify\n- NEVER yield non-trivial work without deliverable proof:\n  - **Experiment/investigation** → run; output is proof; no tests.\n  - **UI change** → verify against the actual surface:\n    - **Web UI** → use `browser.open` to get a tab handle, its direct helpers for common actions, `tab.run` for custom JavaScript, and `tab.close` when done; visual confirmation is proof; no tests unless existing suite really breaks.\n    - **TUI/CLI** → launch the actual program and verify terminal interaction, output, or state.\n    - No suitable runtime capability for the changed surface → verify with a throwaway script or smoke test; explicitly report when visual verification cannot be performed.\n  - **Bug fix** → reproduce, fix, confirm reproduction no longer triggers. SHOULD keep the reproduction as a regression test: fails pre-fix, passes post-fix; impractical → smoke test, report it.\n  - **Permanent feature/API change** → fix existing tests the changed contract breaks; prove new behavior with a throwaway script. New test ONLY for a genuinely uncertain edge case, or on user request.\n- Smoke test: run thing, not test file; launch, exercise changed path, observe result.\n- Tests: permanent load, not proof of work. A test earns its place ONLY where a plausible bug would fail it.\n  - Each MUST defend observable contract/fail on plausible bug.\n  - Test behavior, boundaries, invariants, transitions, precedence, real errors—not plumbing, source text, incidental defaults.\n  - Match conventions; deterministic, isolated, full-suite-safe.\n  - NEVER write a test so the change \"has tests\" → throwaway script.\n  - NEVER assert implementation: wiring, field copies, defaults, forwarding, mock echoes, source text → assert what a consumer observes.\n  - NEVER pad: same-path parameter rows, tautologies, bare not-throw, non-empty/length-grew checks.\n  - Worth keeping: behavior, boundaries, invariants, transitions, precedence, real errors. Match conventions; deterministic, isolated, full-suite-safe.\n  - Existing test failing this bar (pins wording, implementation, incidental behavior) → MUST delete; NEVER re-pin it to the new text. In scope regardless of author.\n\n# 6. Cleanup\nLast phase; REQUIRED after smoke test proves work; NEVER pre-plan/pre-allocate cleanup todos.\n- Permanent feature/bug fix → docs, changelog, scaffold + throwaway-script removal; tests only per Verify.\n- Experiment/one-off investigation → no cleanup tests/docs.\n\n§ Delivery\n<contract>\nInviolable.\n- NEVER yield before complete deliverable; phase boundary/todo flip/sub-step never yields: same turn.\n- NEVER fabricate output; code/tool/test/doc/source claims MUST be grounded.\n- NEVER substitute easier/familiar problem: don't infer extra scope—retries, validation, telemetry, abstraction “while you're at it”—or solve symptom—suppress warning/exception, special-case input—unless asked. Real ask only.\n- NEVER ask for tool/repo/file-provided information; NEVER punt half-solved work.\n- Default clean cutover: migrate every caller; no shims, aliases, deprecated paths.\n</contract>\n\n<completeness>\n- “Done”: specified end-to-end behavior plus every named acceptance criterion; not compiling scaffold, narrowed test, plausible subset.\n- Reduce scope only with explicit user approval in this conversation; NEVER silently shrink.\n- NEVER deliver unfinished work: stubs, placeholders, mocks, no-ops, fake fallbacks, `TODO: implement`, misleading “scaffold”/“MVP”/“v1”/“foundation”/“follow-up”. Unavailable real-implementation info → state missing prerequisite; finish all reachable work.\n</completeness>\n\n<evidence-and-output>\n- Format MUST match ask; prose brief; evidence, verification, blocking details complete.\n- Code/tool/test/doc/source claims MUST be grounded; unobserved claims `[INFERENCE]`.\n- Verification claims exactly match exercised work.\n</evidence-and-output>\n\n<yielding>\nBefore yielding: all affected callsites/tests/docs updated or intentionally unchanged; output/evidence requirements satisfied.\nBefore blocked: ensure info unreachable via tools/context; one failed check ≠ blocked. Finish reachable work; state exactly missing and tried.\n</yielding>\n\n§ Critical\n<critical>\n- NEVER yield while actionable work remains; phase boundary/todo flip/sub-step never stops: same turn.\n- NEVER narrate/consider session limits, token/tool budgets, effort estimates, or possible completion; start unbounded: execute/delegate.\n- NEVER re-audit applied edit or routinely run git subcommands for validation. Tool results are verification.\n</critical>\n\n§ Role\nWorker agent: delegated tasks.\n\nTools: FULL access (edit, write, bash, grep, read, etc.); MUST use as needed to complete task.\nMUST hyperfocus assigned task; NEVER deviate.\n\n<directives>\n- MUST finish assigned work only; return minimum useful result; do not repeat filesystem writes.\n- SHOULD edit files, run commands, create files when task requires.\n- MUST concise; NEVER filler, repetition, tool transcripts. User cannot see you; result: notes for yourself.\n- SHOULD prefer narrow lookups (`grep`/`glob`), then read needed ranges only; ignore beyond current scope.\n- AVOID full-file reads unless necessary.\n- SHOULD prefer editing existing files over creating new files.\n- NEVER create documentation files (`*.md`) unless explicitly requested.\n- MUST follow assignment and instructions.\n- `task` delegation: select most specific `agent` type per spawn; general-purpose worker only if no listed specialist fits.\n</directives>\n\n§ Context\n# Goal\nFix #287 publication race in .worktrees/287-shellrestore while Main completes #217 CI correction. Original #287 commit cb756dee has birth-aware launch arbiter but two-file new-PID/old-birth race. Two unsafe prepare/delete-stamp experiments were fully restored out of shellinfo.rs and shellhost.rs (back to committed source). Main retains shellwake.rs correction routing resolve_wake through live_launch_winner and new recycled-PID/error test; docs checklist corrected but currently mentions removed publish_shell_launch, update later.\n# Constraints\nSkip ALL builds/tests/linters/formatters. NO cargo until doyle BOX FREE; no formatter ever for lane; no pushes or commits. No production state. Worktree files shared but ownership below disjoint. Existing requirements cover persistent restoration and authenticated kill. No pre-spawn removal of old PID/birth evidence: failed spawn must leave original identity intact. Respect legacy records and numeric shell.pid compatibility for older core readers. No schema change in wire.\n# Contract\nStore owner implements: ShellLaunch adds #[serde(default,skip_serializing_if=\"Option::is_none\")] pub pid: Option<u32>. Some(pid) marks modern coherent identity; Some(0) is pidless/cleared (never fall back to numeric PID), None is legacy record. record_shell_launch(&Path,u32,u64)->io::Result<()> atomically publishes the whole JSON PID+native birth+wallclock first (mandatory), then best-effort numeric shell.pid mirror; never delete old evidence before successful replacement. read_shell_process(&Path)->Option<(u32,Option<u64>)> uses ONE parsed modern record; legacy missing pid uses numeric shell.pid plus optional legacy birth. read_shell_pid delegates to this. clear_shell_pid(&Path)->io::Result<()> publishes pid Some(0), birth None preserving launch age, then removes numeric mirror; old evidence remains on mandatory write failure. shell_pid_provably_dead uses coherent tuple. Daemon/callers owner consumes exactly these APIs and updates EVERY call of record_shell_launch to handle Result, plus every ShellLaunch literal outside spt-store adds pid None for intentional legacy fixtures (Some(pid) when modern identity intended). Main owns docs, requirement cleanup, runtime validation and commits. Coordinate via hub if contract implementation detail truly needs adjustment.\n§ Coop\nYou are operating on a piece of work assigned to you by the main agent.\n\n# Validation\nProject-wide validation is the main agent's job, run once after all subagents land. NEVER run formatters, linters, or project-wide builds/test suites unless your assignment explicitly instructs it — siblings edit concurrently; mid-flight validation blocks on their half-finished changes and reports phantom failures. Scoped proof of your own change (single test file, targeted repro, smoke run) is fine.\n# Peers\nYou can reach other live agents via the `hub` tool. Your id is `ShellIdentityStore`. Currently visible peers:\n- `ShellIdentityCallers` — task (sub, running)\n- `Main` — main (main, running)\n- `PersistentRestoreReview` — reviewer (sub, idle)\n8 parked peer(s) omitted.\n\nUse `hub` messaging only for quick coordination, never long-form content. Address peers by id or use `\"all\"` to broadcast.\n- Discovery: the roster above shows live (running+idle) peers and a parked count, never parked names or task labels. `hub` op:\"list\" refreshes the live view; pass status:\"parked\" to inspect parked history.\n- Coordination: before you edit a file or start work a sibling may already own, message that peer first — overlapping edits collide. Idle peers are not gone: messaging them wakes them.\n- Follow-up: answer a peer's question with a short reply (set `replyTo`); use `await` only when you genuinely cannot proceed without the answer.\n- Parked history: omitted from this roster. `hub` op:\"list\" status:\"parked\" lists ids; `send` to a known parked id revives it. `history://<id>` and `agent://<id>` stay readable.\n\n§ Completion\nNo TODO tracking, no progress updates. Execute; report results with `yield`.\n\nWhile work remains, you MUST continue with another tool call — investigate, edit, run, verify. Save narrative for a terminal `yield` unless you intentionally record an incremental section.\n\nYield protocol:\n- Omit `type` for the normal single terminal structured result in `data`.\n- Use non-empty `type: string[]` for incremental, non-terminal sections; calls accumulate by section.\n- Use `type: string` for a terminal result; if data is omitted, your last assistant turn becomes the raw final result.\n\nThis is your only way to return a final result. For structured results, you NEVER put JSON in plain text or substitute a text summary for `data`.\nGiving up is a last resort. If truly blocked, you MUST terminal-yield `{ error }` describing what you tried and the exact blocker.\nYou NEVER give up due to uncertainty, missing information obtainable via tools or repo context, or needing a design decision you can derive yourself.\n\nYou MUST keep going until this ticket is closed. This matters.\n\nPROJECT\n\n<workstation>\n- OS: win32 10.0.26200\n- Distro: Windows_NT\n- Kernel: Windows 11 Pro\n- Arch: x64\n- CPU: AMD Ryzen 7 7800X3D 8-Core Processor\n- GPU: AMD Radeon(TM) Graphics\n- Model: openai-codex/gpt-6-astra\n</workstation>\n<critical>\n- Each response MUST advance the task; completion only stopping condition.\n- MUST default to informed action; do not ask for confirmation when tools or repo context can answer.\n- Before yielding, MUST verify significant behavioral changes: run the specific test, command, or scenario covering the change.\n</critical>","task":"Complete assignment thoroughly:\n\n# Target\nOwn only .worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs. No other file edits.\n# Change\nImplement the shared coherent process-record contract. Use existing atomic writer and fail-toward-alive conventions; no new dependency or lock protocol. Preserve all existing legacy record read behavior. Ensure modern cleared pid never resurrects numeric mirror or residual birth. Implement one coherent read for liveness, never two different record reads paired together. Keep record publication mandatory JSON + best-effort numeric compatibility mirror, with a clear caller-facing error on failed JSON replacement; do not clear previous evidence. Add focused deterministic regressions for mixed old numeric/new modern record, modern clear with stale numeric mirror, failed publication preserving old identity, and legacy mismatch still detected. Tests must exercise observable custody/liveness not source text. Update relevant existing tests in this file for Result and new field; tag real evidence. Run lsp references before exported changes; fall back to complete grep only if server unavailable/misbehaves. Skip all validation/formatting commands.\n# Acceptance\nSource implements exact contract; failed replacement does not erase old process evidence; reader cannot pair PID from one generation with another birth. Return changed symbols and tests for Main to execute, plus explicit limitations. No commit.","tools":["read","bash","edit","eval","glob","grep","task","hub","web_search","write","yield","ast_edit","debug","spt_checkpoint"],"agent":"task","resolvedModel":"openai-codex/gpt-6-astra","readOnly":false,"spawns":"*"}
{"type":"message","id":"e2c0020a","parentId":"75ba7237","timestamp":"2026-09-10T01:03:14.245Z","message":{"role":"user","content":[{"type":"text","text":"Complete assignment thoroughly:\n\n# Target\nOwn only .worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs. No other file edits.\n# Change\nImplement the shared coherent process-record contract. Use existing atomic writer and fail-toward-alive conventions; no new dependency or lock protocol. Preserve all existing legacy record read behavior. Ensure modern cleared pid never resurrects numeric mirror or residual birth. Implement one coherent read for liveness, never two different record reads paired together. Keep record publication mandatory JSON + best-effort numeric compatibility mirror, with a clear caller-facing error on failed JSON replacement; do not clear previous evidence. Add focused deterministic regressions for mixed old numeric/new modern record, modern clear with stale numeric mirror, failed publication preserving old identity, and legacy mismatch still detected. Tests must exercise observable custody/liveness not source text. Update relevant existing tests in this file for Result and new field; tag real evidence. Run lsp references before exported changes; fall back to complete grep only if server unavailable/misbehaves. Skip all validation/formatting commands.\n# Acceptance\nSource implements exact contract; failed replacement does not erase old process evidence; reader cannot pair PID from one generation with another birth. Return changed symbols and tests for Main to execute, plus explicit limitations. No commit."}],"attribution":"agent","timestamp":1789002194203}}
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{"type":"message","id":"f992c7ce","parentId":"53170f35","timestamp":"2026-09-10T01:03:17.182Z","message":{"role":"toolResult","toolCallId":"call_pHOw0n8pQhzT8ApOckiocuIn|fc_0053347aa1a1a4a3016aa201d485e487d1bc9ed2b42d9bf7f3","toolName":"read","content":[{"type":"text","text":"---\nname: diagnose\ndescription: Disciplined diagnosis loop for hard bugs and performance regressions. Reproduce → minimise → hypothesise → instrument → fix → regression-test. Use when user says \"diagnose this\" / \"debug this\", reports a bug, says something is broken/throwing/failing, or describes a performance regression.\n---\n\n# Diagnose\n\nA discipline for hard bugs. Skip phases only when explicitly justified.\n\nWhen exploring the codebase, use the project's domain glossary to get a clear mental model of the relevant modules, and check ADRs in the area you're touching.\n\n## Phase 1 — Build a feedback loop\n\n**This is the skill.** Everything else is mechanical. If you have a fast, deterministic, agent-runnable pass/fail signal for the bug, you will find the cause — bisection, hypothesis-testing, and instrumentation all just consume that signal. If you don't have one, no amount of staring at code will save you.\n\nSpend disproportionate effort here. **Be aggressive. Be creative. Refuse to give up.**\n\n### Ways to construct one — try them in roughly this order\n\n1. **Failing test** at whatever seam reaches the bug — unit, integration, e2e.\n2. **Curl / HTTP script** against a running dev server.\n3. **CLI invocation** with a fixture input, diffing stdout against a known-good snapshot.\n4. **Headless browser script** (Playwright / Puppeteer) — drives the UI, asserts on DOM/console/network.\n5. **Replay a captured trace.** Save a real network request / payload / event log to disk; replay it through the code path in isolation.\n6. **Throwaway harness.** Spin up a minimal subset of the system (one service, mocked deps) that exercises the bug code path with a single function call.\n7. **Property / fuzz loop.** If the bug is \"sometimes wrong output\", run 1000 random inputs and look for the failure mode.\n8. **Bisection harness.** If the bug appeared between two known states (commit, dataset, version), automate \"boot at state X, check, repeat\" so you can `git bisect run` it.\n9. **Differential loop.** Run the same input through old-version vs new-version (or two configs) and diff outputs.\n10. **HITL bash script.** Last resort. If a human must click, drive _them_ with `scripts/hitl-loop.template.sh` so the loop is still structured. Captured output feeds back to you.\n\nBuild the right feedback loop, and the bug is 90% fixed.\n\n### Iterate on the loop itself\n\nTreat the loop as a product. Once you have _a_ loop, ask:\n\n- Can I make it faster? (Cache setup, skip unrelated init, narrow the test scope.)\n- Can I make the signal sharper? (Assert on the specific symptom, not \"didn't crash\".)\n- Can I make it more deterministic? (Pin time, seed RNG, isolate filesystem, freeze network.)\n\nA 30-second flaky loop is barely better than no loop. A 2-second deterministic loop is a debugging superpower.\n\n### Non-deterministic bugs\n\nThe goal is not a clean repro but a **higher reproduction rate**. Loop the trigger 100×, parallelise, add stress, narrow timing windows, inject sleeps. A 50%-flake bug is debuggable; 1% is not — keep raising the rate until it's debuggable.\n\n### When you genuinely cannot build a loop\n\nStop and say so explicitly. List what you tried. Ask the user for: (a) access to whatever environment reproduces it, (b) a captured artifact (HAR file, log dump, core dump, screen recording with timestamps), or (c) permission to add temporary production instrumentation. Do **not** proceed to hypothesise without a loop.\n\nDo not proceed to Phase 2 until you have a loop you believe in.\n\n## Phase 2 — Reproduce\n\nRun the loop. Watch the bug appear.\n\nConfirm:\n\n- [ ] The loop produces the failure mode the **user** described — not a different failure that happens to be nearby. Wrong bug = wrong fix.\n- [ ] The failure is reproducible across multiple runs (or, for non-deterministic bugs, reproducible at a high enough rate to debug against).\n- [ ] You have captured the exact symptom (error message, wrong output, slow timing) so later phases can verify the fix actually addresses it.\n\nDo not proceed until you reproduce the bug.\n\n## Phase 3 — Hypothesise\n\nGenerate **3–5 ranked hypotheses** before testing any of them. Single-hypothesis generation anchors on the first plausible idea.\n\nEach hypothesis must be **falsifiable**: state the prediction it makes.\n\n> Format: \"If <X> is the cause, then <changing Y> will make the bug disappear / <changing Z> will make it worse.\"\n\nIf you cannot state the prediction, the hypothesis is a vibe — discard or sharpen it.\n\n**Show the ranked list to the user before testing.** They often have domain knowledge that re-ranks instantly (\"we just deployed a change to #3\"), or know hypotheses they've already ruled out. Cheap checkpoint, big time saver. Don't block on it — proceed with your ranking if the user is AFK.\n\n## Phase 4 — Instrument\n\nEach probe must map to a specific prediction from Phase 3. **Change one variable at a time.**\n\nTool preference:\n\n1. **Debugger / REPL inspection** if the env supports it. One breakpoint beats ten logs.\n2. **Targeted logs** at the boundaries that distinguish hypotheses.\n3. Never \"log everything and grep\".\n\n**Tag every debug log** with a unique prefix, e.g. `[DEBUG-a4f2]`. Cleanup at the end becomes a single grep. Untagged logs survive; tagged logs die.\n\n**Perf branch.** For performance regressions, logs are usually wrong. Instead: establish a baseline measurement (timing harness, `performance.now()`, profiler, query plan), then bisect. Measure first, fix second.\n\n## Phase 5 — Fix + regression test\n\nWrite the regression test **before the fix** — but only if there is a **correct seam** for it.\n\nA correct seam is one where the test exercises the **real bug pattern** as it occurs at the call site. If the only available seam is too shallow (single-caller test when the bug needs multiple callers, unit test that can't replicate the chain that triggered the bug), a regression test there gives false confidence.\n\n**If no correct seam exists, that itself is the finding.** Note it. The codebase architecture is preventing the bug from being locked down. Flag this for the next phase.\n\nIf a correct seam exists:\n\n1. Turn the minimised repro into a failing test at that seam.\n2. Watch it fail.\n3. Apply the fix.\n4. Watch it pass.\n5. Re-run the Phase 1 feedback loop against the original (un-minimised) scenario.\n\n## Phase 6 — Cleanup + post-mortem\n\nRequired before declaring done:\n\n- [ ] Original repro no longer reproduces (re-run the Phase 1 loop)\n- [ ] Regression test passes (or absence of seam is documented)\n- [ ] All `[DEBUG-...]` instrumentation removed (`grep` the prefix)\n- [ ] Throwaway prototypes deleted (or moved to a clearly-marked debug location)\n- [ ] The hypothesis that turned out correct is stated in the commit / PR message — so the next debugger learns\n\n**Then ask: what would have prevented this bug?** If the answer involves architectural change (no good test seam, tangled callers, hidden coupling) hand off to the `/improve-codebase-architecture` skill with the specifics. Make the recommendation **after** the fix is in, not before — you have more information now than when you started."}],"details":{"resolvedPath":"C:\\Users\\decid\\.agents\\skills\\diagnose\\SKILL.md","contentType":"text/markdown","totalLines":117,"displayContent":{"text":"---\r\nname: diagnose\r\ndescription: Disciplined diagnosis loop for hard bugs and performance regressions. Reproduce → minimise → hypothesise → instrument → fix → regression-test. Use when user says \"diagnose this\" / \"debug this\", reports a bug, says something is broken/throwing/failing, or describes a performance regression.\r\n---\r\n\r\n# Diagnose\r\n\r\nA discipline for hard bugs. Skip phases only when explicitly justified.\r\n\r\nWhen exploring the codebase, use the project's domain glossary to get a clear mental model of the relevant modules, and check ADRs in the area you're touching.\r\n\r\n## Phase 1 — Build a feedback loop\r\n\r\n**This is the skill.** Everything else is mechanical. If you have a fast, deterministic, agent-runnable pass/fail signal for the bug, you will find the cause — bisection, hypothesis-testing, and instrumentation all just consume that signal. If you don't have one, no amount of staring at code will save you.\r\n\r\nSpend disproportionate effort here. **Be aggressive. Be creative. Refuse to give up.**\r\n\r\n### Ways to construct one — try them in roughly this order\r\n\r\n1. **Failing test** at whatever seam reaches the bug — unit, integration, e2e.\r\n2. **Curl / HTTP script** against a running dev server.\r\n3. **CLI invocation** with a fixture input, diffing stdout against a known-good snapshot.\r\n4. **Headless browser script** (Playwright / Puppeteer) — drives the UI, asserts on DOM/console/network.\r\n5. **Replay a captured trace.** Save a real network request / payload / event log to disk; replay it through the code path in isolation.\r\n6. **Throwaway harness.** Spin up a minimal subset of the system (one service, mocked deps) that exercises the bug code path with a single function call.\r\n7. **Property / fuzz loop.** If the bug is \"sometimes wrong output\", run 1000 random inputs and look for the failure mode.\r\n8. **Bisection harness.** If the bug appeared between two known states (commit, dataset, version), automate \"boot at state X, check, repeat\" so you can `git bisect run` it.\r\n9. **Differential loop.** Run the same input through old-version vs new-version (or two configs) and diff outputs.\r\n10. **HITL bash script.** Last resort. If a human must click, drive _them_ with `scripts/hitl-loop.template.sh` so the loop is still structured. Captured output feeds back to you.\r\n\r\nBuild the right feedback loop, and the bug is 90% fixed.\r\n\r\n### Iterate on the loop itself\r\n\r\nTreat the loop as a product. Once you have _a_ loop, ask:\r\n\r\n- Can I make it faster? (Cache setup, skip unrelated init, narrow the test scope.)\r\n- Can I make the signal sharper? (Assert on the specific symptom, not \"didn't crash\".)\r\n- Can I make it more deterministic? (Pin time, seed RNG, isolate filesystem, freeze network.)\r\n\r\nA 30-second flaky loop is barely better than no loop. A 2-second deterministic loop is a debugging superpower.\r\n\r\n### Non-deterministic bugs\r\n\r\nThe goal is not a clean repro but a **higher reproduction rate**. Loop the trigger 100×, parallelise, add stress, narrow timing windows, inject sleeps. A 50%-flake bug is debuggable; 1% is not — keep raising the rate until it's debuggable.\r\n\r\n### When you genuinely cannot build a loop\r\n\r\nStop and say so explicitly. List what you tried. Ask the user for: (a) access to whatever environment reproduces it, (b) a captured artifact (HAR file, log dump, core dump, screen recording with timestamps), or (c) permission to add temporary production instrumentation. Do **not** proceed to hypothesise without a loop.\r\n\r\nDo not proceed to Phase 2 until you have a loop you believe in.\r\n\r\n## Phase 2 — Reproduce\r\n\r\nRun the loop. Watch the bug appear.\r\n\r\nConfirm:\r\n\r\n- [ ] The loop produces the failure mode the **user** described — not a different failure that happens to be nearby. Wrong bug = wrong fix.\r\n- [ ] The failure is reproducible across multiple runs (or, for non-deterministic bugs, reproducible at a high enough rate to debug against).\r\n- [ ] You have captured the exact symptom (error message, wrong output, slow timing) so later phases can verify the fix actually addresses it.\r\n\r\nDo not proceed until you reproduce the bug.\r\n\r\n## Phase 3 — Hypothesise\r\n\r\nGenerate **3–5 ranked hypotheses** before testing any of them. Single-hypothesis generation anchors on the first plausible idea.\r\n\r\nEach hypothesis must be **falsifiable**: state the prediction it makes.\r\n\r\n> Format: \"If <X> is the cause, then <changing Y> will make the bug disappear / <changing Z> will make it worse.\"\r\n\r\nIf you cannot state the prediction, the hypothesis is a vibe — discard or sharpen it.\r\n\r\n**Show the ranked list to the user before testing.** They often have domain knowledge that re-ranks instantly (\"we just deployed a change to #3\"), or know hypotheses they've already ruled out. Cheap checkpoint, big time saver. Don't block on it — proceed with your ranking if the user is AFK.\r\n\r\n## Phase 4 — Instrument\r\n\r\nEach probe must map to a specific prediction from Phase 3. **Change one variable at a time.**\r\n\r\nTool preference:\r\n\r\n1. **Debugger / REPL inspection** if the env supports it. One breakpoint beats ten logs.\r\n2. **Targeted logs** at the boundaries that distinguish hypotheses.\r\n3. Never \"log everything and grep\".\r\n\r\n**Tag every debug log** with a unique prefix, e.g. `[DEBUG-a4f2]`. Cleanup at the end becomes a single grep. Untagged logs survive; tagged logs die.\r\n\r\n**Perf branch.** For performance regressions, logs are usually wrong. Instead: establish a baseline measurement (timing harness, `performance.now()`, profiler, query plan), then bisect. Measure first, fix second.\r\n\r\n## Phase 5 — Fix + regression test\r\n\r\nWrite the regression test **before the fix** — but only if there is a **correct seam** for it.\r\n\r\nA correct seam is one where the test exercises the **real bug pattern** as it occurs at the call site. If the only available seam is too shallow (single-caller test when the bug needs multiple callers, unit test that can't replicate the chain that triggered the bug), a regression test there gives false confidence.\r\n\r\n**If no correct seam exists, that itself is the finding.** Note it. The codebase architecture is preventing the bug from being locked down. Flag this for the next phase.\r\n\r\nIf a correct seam exists:\r\n\r\n1. Turn the minimised repro into a failing test at that seam.\r\n2. Watch it fail.\r\n3. Apply the fix.\r\n4. Watch it pass.\r\n5. Re-run the Phase 1 feedback loop against the original (un-minimised) scenario.\r\n\r\n## Phase 6 — Cleanup + post-mortem\r\n\r\nRequired before declaring done:\r\n\r\n- [ ] Original repro no longer reproduces (re-run the Phase 1 loop)\r\n- [ ] Regression test passes (or absence of seam is documented)\r\n- [ ] All `[DEBUG-...]` instrumentation removed (`grep` the prefix)\r\n- [ ] Throwaway prototypes deleted (or moved to a clearly-marked debug location)\r\n- [ ] The hypothesis that turned out correct is stated in the commit / PR message — so the next debugger learns\r\n\r\n**Then ask: what would have prevented this bug?** If the answer involves architectural change (no good test seam, tangled callers, hidden coupling) hand off to the `/improve-codebase-architecture` skill with the specifics. Make the recommendation **after** the fix is in, not before — you have more information now than when you started.\r","startLine":1,"lineNumbers":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117]},"meta":{"source":{"type":"internal","value":"skill://diagnose"}}},"isError":false,"timestamp":1789002197182}}
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{"type":"message","id":"3048055e","parentId":"d62390e4","timestamp":"2026-09-10T01:03:22.208Z","message":{"role":"toolResult","toolCallId":"call_ISA1RR61VVD2J808od3UF98v|fc_0053347aa1a1a4a3016aa201da15c487d187f078b4d06c96f3","toolName":"read","content":[{"type":"text","text":"---\nname: diagnosing-bugs\ndescription: Diagnosis loop for hard bugs and performance regressions. Use when the user says \"diagnose\"/\"debug this\", or reports something broken/throwing/failing/slow.\n---\n\n# Diagnosing Bugs\n\nA discipline for hard bugs. Skip phases only when explicitly justified.\n\nWhen exploring the codebase, read `CONTEXT.md` (if it exists) to get a clear mental model of the relevant modules, and check ADRs in the area you're touching.\n\n## Phase 1 — Build a feedback loop\n\n**This is the skill.** Everything else is mechanical. If you have a **tight** pass/fail signal for the bug — one that goes red on _this_ bug — you will find the cause; bisection, hypothesis-testing, and instrumentation all just consume it. If you don't have one, no amount of staring at code will save you.\n\nSpend disproportionate effort here. **Be aggressive. Be creative. Refuse to give up.**\n\n### Ways to construct one — try them in roughly this order\n\n1. **Failing test** at whatever seam reaches the bug — unit, integration, e2e.\n2. **Curl / HTTP script** against a running dev server.\n3. **CLI invocation** with a fixture input, diffing stdout against a known-good snapshot.\n4. **Headless browser script** (Playwright / Puppeteer) — drives the UI, asserts on DOM/console/network.\n5. **Replay a captured trace.** Save a real network request / payload / event log to disk; replay it through the code path in isolation.\n6. **Throwaway harness.** Spin up a minimal subset of the system (one service, mocked deps) that exercises the bug code path with a single function call.\n7. **Property / fuzz loop.** If the bug is \"sometimes wrong output\", run 1000 random inputs and look for the failure mode.\n8. **Bisection harness.** If the bug appeared between two known states (commit, dataset, version), automate \"boot at state X, check, repeat\" so you can `git bisect run` it.\n9. **Differential loop.** Run the same input through old-version vs new-version (or two configs) and diff outputs.\n10. **HITL bash script.** Last resort. If a human must click, drive _them_ with `scripts/hitl-loop.template.sh` so the loop is still structured. Captured output feeds back to you.\n\nBuild the right feedback loop, and the bug is 90% fixed.\n\n### Tighten the loop\n\nTreat the loop as a product. Once you have _a_ loop, **tighten** it:\n\n- Can I make it faster? (Cache setup, skip unrelated init, narrow the test scope.)\n- Can I make the signal sharper? (Assert on the specific symptom, not \"didn't crash\".)\n- Can I make it more deterministic? (Pin time, seed RNG, isolate filesystem, freeze network.)\n\nA 30-second flaky loop is barely better than no loop; a 2-second deterministic one is tight — a debugging superpower.\n\n### Non-deterministic bugs\n\nThe goal is not a clean repro but a **higher reproduction rate**. Loop the trigger 100×, parallelise, add stress, narrow timing windows, inject sleeps. A 50%-flake bug is debuggable; 1% is not — keep raising the rate until it's debuggable.\n\n### When you genuinely cannot build a loop\n\nStop and say so explicitly. List what you tried. Ask the user for: (a) access to whatever environment reproduces it, (b) a captured artifact (HAR file, log dump, core dump, screen recording with timestamps), or (c) permission to add temporary production instrumentation. Do **not** proceed to hypothesise without a loop.\n\n### Completion criterion — a tight loop that goes red\n\nPhase 1 is done when the loop is **tight** and **red-capable**: you can name **one command** — a script path, a test invocation, a curl — that you have **already run at least once** (paste the invocation and its output), and that is:\n\n- [ ] **Red-capable** — it drives the actual bug code path and asserts the **user's exact symptom**, so it can go red on this bug and green once fixed. Not \"runs without erroring\" — it must be able to _catch this specific bug_.\n- [ ] **Deterministic** — same verdict every run (flaky bugs: a pinned, high reproduction rate, per above).\n- [ ] **Fast** — seconds, not minutes.\n- [ ] **Agent-runnable** — you can run it unattended; a human in the loop only via `scripts/hitl-loop.template.sh`.\n\nIf you catch yourself reading code to build a theory before this command exists, **stop — jumping straight to a hypothesis is the exact failure this skill prevents.** No red-capable command, no Phase 2.\n\n## Phase 2 — Reproduce + minimise\n\nRun the loop. Watch it go red — the bug appears.\n\nConfirm:\n\n- [ ] The loop produces the failure mode the **user** described — not a different failure that happens to be nearby. Wrong bug = wrong fix.\n- [ ] The failure is reproducible across multiple runs (or, for non-deterministic bugs, reproducible at a high enough rate to debug against).\n- [ ] You have captured the exact symptom (error message, wrong output, slow timing) so later phases can verify the fix actually addresses it.\n\n### Minimise\n\nOnce it's red, shrink the repro to the **smallest scenario that still goes red**. Cut inputs, callers, config, data, and steps **one at a time**, re-running the loop after each cut — keep only what's load-bearing for the failure.\n\nWhy bother: a minimal repro shrinks the hypothesis space in Phase 3 (fewer moving parts left to suspect) and becomes the clean regression test in Phase 5.\n\nDone when **every remaining element is load-bearing** — removing any one of them makes the loop go green.\n\nDo not proceed until you have reproduced **and** minimised.\n\n## Phase 3 — Hypothesise\n\nGenerate **3–5 ranked hypotheses** before testing any of them. Single-hypothesis generation anchors on the first plausible idea.\n\nEach hypothesis must be **falsifiable**: state the prediction it makes.\n\n> Format: \"If <X> is the cause, then <changing Y> will make the bug disappear / <changing Z> will make it worse.\"\n\nIf you cannot state the prediction, the hypothesis is a vibe — discard or sharpen it.\n\n**Show the ranked list to the user before testing.** They often have domain knowledge that re-ranks instantly (\"we just deployed a change to #3\"), or know hypotheses they've already ruled out. Cheap checkpoint, big time saver. Don't block on it — proceed with your ranking if the user is AFK.\n\n## Phase 4 — Instrument\n\nEach probe must map to a specific prediction from Phase 3. **Change one variable at a time.**\n\nTool preference:\n\n1. **Debugger / REPL inspection** if the env supports it. One breakpoint beats ten logs.\n2. **Targeted logs** at the boundaries that distinguish hypotheses.\n3. Never \"log everything and grep\".\n\n**Tag every debug log** with a unique prefix, e.g. `[DEBUG-a4f2]`. Cleanup at the end becomes a single grep. Untagged logs survive; tagged logs die.\n\n**Perf branch.** For performance regressions, logs are usually wrong. Instead: establish a baseline measurement (timing harness, `performance.now()`, profiler, query plan), then bisect. Measure first, fix second.\n\n## Phase 5 — Fix + regression test\n\nWrite the regression test **before the fix** — but only if there is a **correct seam** for it.\n\nA correct seam is one where the test exercises the **real bug pattern** as it occurs at the call site. If the only available seam is too shallow (single-caller test when the bug needs multiple callers, unit test that can't replicate the chain that triggered the bug), a regression test there gives false confidence.\n\n**If no correct seam exists, that itself is the finding.** Note it. The codebase architecture is preventing the bug from being locked down. Flag this for the next phase.\n\nIf a correct seam exists:\n\n1. Turn the minimised repro into a failing test at that seam.\n2. Watch it fail.\n3. Apply the fix.\n4. Watch it pass.\n5. Re-run the Phase 1 feedback loop against the original (un-minimised) scenario.\n\n## Phase 6 — Cleanup + post-mortem\n\nRequired before declaring done:\n\n- [ ] Original repro no longer reproduces (re-run the Phase 1 loop)\n- [ ] Regression test passes (or absence of seam is documented)\n- [ ] All `[DEBUG-...]` instrumentation removed (`grep` the prefix)\n- [ ] Throwaway prototypes deleted (or moved to a clearly-marked debug location)\n- [ ] The hypothesis that turned out correct is stated in the commit / PR message — so the next debugger learns\n\n**Then ask: what would have prevented this bug?** If the answer involves architectural change (no good test seam, tangled callers, hidden coupling) hand off to the `/improve-codebase-architecture` skill with the specifics. Make the recommendation **after** the fix is in, not before — you have more information now than when you started."}],"details":{"resolvedPath":"C:\\Users\\decid\\.agents\\skills\\diagnosing-bugs\\SKILL.md","contentType":"text/markdown","totalLines":134,"displayContent":{"text":"---\r\nname: diagnosing-bugs\r\ndescription: Diagnosis loop for hard bugs and performance regressions. Use when the user says \"diagnose\"/\"debug this\", or reports something broken/throwing/failing/slow.\r\n---\r\n\r\n# Diagnosing Bugs\r\n\r\nA discipline for hard bugs. Skip phases only when explicitly justified.\r\n\r\nWhen exploring the codebase, read `CONTEXT.md` (if it exists) to get a clear mental model of the relevant modules, and check ADRs in the area you're touching.\r\n\r\n## Phase 1 — Build a feedback loop\r\n\r\n**This is the skill.** Everything else is mechanical. If you have a **tight** pass/fail signal for the bug — one that goes red on _this_ bug — you will find the cause; bisection, hypothesis-testing, and instrumentation all just consume it. If you don't have one, no amount of staring at code will save you.\r\n\r\nSpend disproportionate effort here. **Be aggressive. Be creative. Refuse to give up.**\r\n\r\n### Ways to construct one — try them in roughly this order\r\n\r\n1. **Failing test** at whatever seam reaches the bug — unit, integration, e2e.\r\n2. **Curl / HTTP script** against a running dev server.\r\n3. **CLI invocation** with a fixture input, diffing stdout against a known-good snapshot.\r\n4. **Headless browser script** (Playwright / Puppeteer) — drives the UI, asserts on DOM/console/network.\r\n5. **Replay a captured trace.** Save a real network request / payload / event log to disk; replay it through the code path in isolation.\r\n6. **Throwaway harness.** Spin up a minimal subset of the system (one service, mocked deps) that exercises the bug code path with a single function call.\r\n7. **Property / fuzz loop.** If the bug is \"sometimes wrong output\", run 1000 random inputs and look for the failure mode.\r\n8. **Bisection harness.** If the bug appeared between two known states (commit, dataset, version), automate \"boot at state X, check, repeat\" so you can `git bisect run` it.\r\n9. **Differential loop.** Run the same input through old-version vs new-version (or two configs) and diff outputs.\r\n10. **HITL bash script.** Last resort. If a human must click, drive _them_ with `scripts/hitl-loop.template.sh` so the loop is still structured. Captured output feeds back to you.\r\n\r\nBuild the right feedback loop, and the bug is 90% fixed.\r\n\r\n### Tighten the loop\r\n\r\nTreat the loop as a product. Once you have _a_ loop, **tighten** it:\r\n\r\n- Can I make it faster? (Cache setup, skip unrelated init, narrow the test scope.)\r\n- Can I make the signal sharper? (Assert on the specific symptom, not \"didn't crash\".)\r\n- Can I make it more deterministic? (Pin time, seed RNG, isolate filesystem, freeze network.)\r\n\r\nA 30-second flaky loop is barely better than no loop; a 2-second deterministic one is tight — a debugging superpower.\r\n\r\n### Non-deterministic bugs\r\n\r\nThe goal is not a clean repro but a **higher reproduction rate**. Loop the trigger 100×, parallelise, add stress, narrow timing windows, inject sleeps. A 50%-flake bug is debuggable; 1% is not — keep raising the rate until it's debuggable.\r\n\r\n### When you genuinely cannot build a loop\r\n\r\nStop and say so explicitly. List what you tried. Ask the user for: (a) access to whatever environment reproduces it, (b) a captured artifact (HAR file, log dump, core dump, screen recording with timestamps), or (c) permission to add temporary production instrumentation. Do **not** proceed to hypothesise without a loop.\r\n\r\n### Completion criterion — a tight loop that goes red\r\n\r\nPhase 1 is done when the loop is **tight** and **red-capable**: you can name **one command** — a script path, a test invocation, a curl — that you have **already run at least once** (paste the invocation and its output), and that is:\r\n\r\n- [ ] **Red-capable** — it drives the actual bug code path and asserts the **user's exact symptom**, so it can go red on this bug and green once fixed. Not \"runs without erroring\" — it must be able to _catch this specific bug_.\r\n- [ ] **Deterministic** — same verdict every run (flaky bugs: a pinned, high reproduction rate, per above).\r\n- [ ] **Fast** — seconds, not minutes.\r\n- [ ] **Agent-runnable** — you can run it unattended; a human in the loop only via `scripts/hitl-loop.template.sh`.\r\n\r\nIf you catch yourself reading code to build a theory before this command exists, **stop — jumping straight to a hypothesis is the exact failure this skill prevents.** No red-capable command, no Phase 2.\r\n\r\n## Phase 2 — Reproduce + minimise\r\n\r\nRun the loop. Watch it go red — the bug appears.\r\n\r\nConfirm:\r\n\r\n- [ ] The loop produces the failure mode the **user** described — not a different failure that happens to be nearby. Wrong bug = wrong fix.\r\n- [ ] The failure is reproducible across multiple runs (or, for non-deterministic bugs, reproducible at a high enough rate to debug against).\r\n- [ ] You have captured the exact symptom (error message, wrong output, slow timing) so later phases can verify the fix actually addresses it.\r\n\r\n### Minimise\r\n\r\nOnce it's red, shrink the repro to the **smallest scenario that still goes red**. Cut inputs, callers, config, data, and steps **one at a time**, re-running the loop after each cut — keep only what's load-bearing for the failure.\r\n\r\nWhy bother: a minimal repro shrinks the hypothesis space in Phase 3 (fewer moving parts left to suspect) and becomes the clean regression test in Phase 5.\r\n\r\nDone when **every remaining element is load-bearing** — removing any one of them makes the loop go green.\r\n\r\nDo not proceed until you have reproduced **and** minimised.\r\n\r\n## Phase 3 — Hypothesise\r\n\r\nGenerate **3–5 ranked hypotheses** before testing any of them. Single-hypothesis generation anchors on the first plausible idea.\r\n\r\nEach hypothesis must be **falsifiable**: state the prediction it makes.\r\n\r\n> Format: \"If <X> is the cause, then <changing Y> will make the bug disappear / <changing Z> will make it worse.\"\r\n\r\nIf you cannot state the prediction, the hypothesis is a vibe — discard or sharpen it.\r\n\r\n**Show the ranked list to the user before testing.** They often have domain knowledge that re-ranks instantly (\"we just deployed a change to #3\"), or know hypotheses they've already ruled out. Cheap checkpoint, big time saver. Don't block on it — proceed with your ranking if the user is AFK.\r\n\r\n## Phase 4 — Instrument\r\n\r\nEach probe must map to a specific prediction from Phase 3. **Change one variable at a time.**\r\n\r\nTool preference:\r\n\r\n1. **Debugger / REPL inspection** if the env supports it. One breakpoint beats ten logs.\r\n2. **Targeted logs** at the boundaries that distinguish hypotheses.\r\n3. Never \"log everything and grep\".\r\n\r\n**Tag every debug log** with a unique prefix, e.g. `[DEBUG-a4f2]`. Cleanup at the end becomes a single grep. Untagged logs survive; tagged logs die.\r\n\r\n**Perf branch.** For performance regressions, logs are usually wrong. Instead: establish a baseline measurement (timing harness, `performance.now()`, profiler, query plan), then bisect. Measure first, fix second.\r\n\r\n## Phase 5 — Fix + regression test\r\n\r\nWrite the regression test **before the fix** — but only if there is a **correct seam** for it.\r\n\r\nA correct seam is one where the test exercises the **real bug pattern** as it occurs at the call site. If the only available seam is too shallow (single-caller test when the bug needs multiple callers, unit test that can't replicate the chain that triggered the bug), a regression test there gives false confidence.\r\n\r\n**If no correct seam exists, that itself is the finding.** Note it. The codebase architecture is preventing the bug from being locked down. Flag this for the next phase.\r\n\r\nIf a correct seam exists:\r\n\r\n1. Turn the minimised repro into a failing test at that seam.\r\n2. Watch it fail.\r\n3. Apply the fix.\r\n4. Watch it pass.\r\n5. Re-run the Phase 1 feedback loop against the original (un-minimised) scenario.\r\n\r\n## Phase 6 — Cleanup + post-mortem\r\n\r\nRequired before declaring done:\r\n\r\n- [ ] Original repro no longer reproduces (re-run the Phase 1 loop)\r\n- [ ] Regression test passes (or absence of seam is documented)\r\n- [ ] All `[DEBUG-...]` instrumentation removed (`grep` the prefix)\r\n- [ ] Throwaway prototypes deleted (or moved to a clearly-marked debug location)\r\n- [ ] The hypothesis that turned out correct is stated in the commit / PR message — so the next debugger learns\r\n\r\n**Then ask: what would have prevented this bug?** If the answer involves architectural change (no good test seam, tangled callers, hidden coupling) hand off to the `/improve-codebase-architecture` skill with the specifics. Make the recommendation **after** the fix is in, not before — you have more information now than when you started.\r","startLine":1,"lineNumbers":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134]},"meta":{"source":{"type":"internal","value":"skill://diagnosing-bugs"}}},"isError":false,"timestamp":1789002202208}}
{"type":"message","id":"0181e260","parentId":"3048055e","timestamp":"2026-09-10T01:03:22.216Z","message":{"role":"toolResult","toolCallId":"call_ifXAIaLP2xUE6ZXH7oYFBdHu|fc_0053347aa1a1a4a3016aa201da15a487d1ba8ccd82e5c9276b","toolName":"read","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#D341]\n1://! Shell-instance perch records (M5-D3a — CONTEXT §Shell model,\n2://! `docs/STORAGE.md` §Shells in the layout).\n3://!\n4://! A shell perch is **not** an agent perch: its `info.json` carries exactly\n5://! `type=Shell, owner, adapter_name, status, alias?` — a dedicated\n6://! [`ShellInfo`] shape, deliberately distinct from [`crate::info::InfoJson`],\n7://! so the agent-perch readers (liveness, registry stale-clean, the consent\n8://! MRA scan) stay blind to shells by construction. Capabilities are **never**\n9://! duplicated here — they resolve from the shell adapter manifest by\n10://! `adapter_name`.\n11://!\n12://! **Identity model (REQ-EP-5):** `spt shell spawn` *mints* a new instance —\n13://! the immutable canonical id `<adapter>-<n>` ([`mint_shell_id`]: smallest\n14://! free `n` over **existing** instance dirs; online and offline both occupy,\n15://! `teardown` frees the slot). The optional **alias** is a per-instance,\n16://! owner-unique display/address overlay set at spawn or by `shell rename` —\n17://! interchangeable with the canonical id for addressing\n18://! ([`resolve_shell_ref`], canonical-first), never obscuring `adapter_name`.\n19://!\n20://! Torn-read stance mirrors `info.rs` (KNOWN-HAZARDS 1.2): writers go through\n21://! the atomic rename; readers tolerate failure and return `None`.\n22:// [impl->REQ-EP-5]\n23:\n24:use serde::{Deserialize, Serialize};\n…\n28:use crate::perch;\n29:\n30:/// `status` value: the shell binary is linked and running.\n31:pub const SHELL_STATUS_ONLINE: &str = \"online\";\n32:/// `status` value: the perch exists, no binary linked (re-linkable if the\n33:/// adapter is `persistent`; the spawn-time initial state until D3b binds).\n34:pub const SHELL_STATUS_OFFLINE: &str = \"offline\";\n35:/// The fixed `type` tag on every shell perch record.\n36:pub const SHELL_TYPE: &str = \"Shell\";\n37:\n38:/// On-disk shape of a shell perch's `info.json` — the full field set, by\n39:/// contract (STORAGE.md: \"carries only `type=Shell`, `owner`, `adapter_name`,\n40:/// `status`, and an optional `alias`\").\n41:// [impl->REQ-SHELL-1]\n42:#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]\n43-56:pub struct ShellInfo { … }\n57:\n58-70:impl ShellInfo { … }\n71:\n72:/// Shell-instance model failures — CLI-facing, so they carry the why.\n73:#[derive(Debug)]\n74-81:pub enum ShellError { … }\n82:\n83-91:impl std::fmt::Display for ShellError { … }\n92:\n93-97:impl From<std::io::Error> for ShellError { … }\n98:\n99:/// Read a shell perch's record. Tolerant (`None` on missing/corrupt — the\n100:/// list path skips, never panics) and shape-checked: a record whose `type`\n101:/// isn't [`SHELL_TYPE`] is not a shell perch.\n102-106:pub fn read_shell_info(shell_perch: &Path) -> Option<ShellInfo> { … }\n107:\n108:/// Write a shell perch's record (atomic rename — the 1.2 torn-read stance).\n109:/// Creates the perch dir.\n110-114:pub fn write_shell_info(shell_perch: &Path, info: &ShellInfo) -> std::io::Result<()> { … }\n115:\n116:/// The launched binary's recorded pid, one file per instance perch. Written by\n117:/// the launch, removed by the close — and the ONLY on-disk evidence that the\n118:/// process a record calls `online` still exists.\n119:pub const SHELL_PID_FILE: &str = \"shell.pid\";\n120:\n121:/// The recorded launch pid, if the perch parks a parseable one.\n122-128:pub fn read_shell_pid(shell_perch: &Path) -> Option<u32> { … }\n129:\n130:/// `<shell_perch>/shell.launch.json` — the birth stamp parked beside the pid at\n131:/// launch (BAROMETER W2, releases#78).\n132:pub const SHELL_LAUNCH_FILE: &str = \"shell.launch.json\";\n133:\n134:/// What a launch recorded about the process it started.\n135:///\n136:/// TWO VALUES, ANSWERING TWO DIFFERENT QUESTIONS, and keeping them apart is the\n137:/// whole point of the shape:\n138:///\n139:/// - `pid_started_at` is the platform's NATIVE start-time value, used for one\n140:///   question only — the same-pid-different-process PAIR test within a single\n141:///   boot ([`crate::liveness::relay_liveness`]). It is deliberately never\n142:///   compared across boots, because it is not the same kind of number on every\n143:///   platform: on Windows it is an absolute FILETIME, but on Linux it is field\n144:///   22 of `/proc/<pid>/stat`, i.e. JIFFIES SINCE BOOT, which resets at every\n145:///   boot. A value recorded before a restart is therefore indistinguishable\n146:///   from a fresh one after it, and any cross-boot comparison of this field\n147:///   would be correct on Windows and silently wrong on Linux.\n148:/// - `launched_ms` is an ABSOLUTE wall-clock stamp (epoch-ms), used by the\n149:///   nonpersistent watcher's cross-boot freeze. Persistent restoration does not\n150:///   gate on launch age; the native birth stamp still authenticates liveness.\n151:#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]\n152-158:pub struct ShellLaunch { … }\n159:\n160:/// Record the birth stamp for a just-launched `pid`. Best-effort: a stamp that\n161:/// cannot be written must never fail the launch — a missing stamp degrades the\n162:/// probe to its pre-existing fail-toward-alive behaviour, which is the safe\n163:/// direction, while a failed launch is a real outage.\n164:// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n165-173:pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) { … }\n174:\n175:/// Read the birth stamp, if this instance was launched by a build that parks one.\n176:/// Absent or unparseable ⇒ `None`, which every consumer treats as \"no stamp to\n177:/// compare\" rather than as a fault.\n178-181:pub fn read_shell_launch(shell_perch: &Path) -> Option<ShellLaunch> { … }\n182:\n183:/// **The** discriminant behind [`effective_status`]: is this instance's recorded\n184:/// binary *provably* gone? Narrow on purpose — true only when the perch parks a\n185:/// pid, it parses non-zero, and the process is not alive.\n186:///\n187:/// Everything else reads **alive**: an absent or unparseable pid file, and the\n188:/// `0` a broker-hosted spawn records when its backend exposed no pid\n189:/// ([`crate::proc::is_process_alive`] already reads 0 as dead, so the explicit\n190:/// filter here is what keeps a pid-less backend from being declared dead by this\n191:/// resolver). That fail-toward-alive stance mirrors `liveness.rs`'s interim\n192:/// parity: this predicate exists to catch a *corpse*, never to guess at a\n193:/// backend it cannot see.\n194:///\n195:/// Recycled pids read alive, so a heal can be **missed** but never **mis-fired**\n196:/// — the failure direction is \"stays stale\", never \"tears down a live instance\".\n197:// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n198-219:pub fn shell_pid_provably_dead(shell_perch: &Path) -> bool { … }\n220:\n221:/// A shell instance's **derived** status — the shell-side twin of\n222:/// `liveness::is_perch_alive` (REQ-HAZARD-DAEMON-HOSTED-LIVENESS gave agent\n223:/// perches exactly this; shells never got it).\n224:///\n225:/// The recorded `status` has exactly two writers — the bind handshake (→online)\n226:/// and `spt_daemon::shellhost::close_shell` (→offline) — and `close_shell` runs\n227:/// on the **link-break** path alone. A binary that dies\n228:/// abruptly (force-kill, crash, OOM) breaks no link, so nothing ever writes the\n229:/// flip and the record says `online` forever. Deriving closes that hole without\n230:/// adding a supervisor: `online` + a provably-dead pid reads\n231:/// [`SHELL_STATUS_OFFLINE`]; every other case is the recorded value verbatim.\n232:///\n233:/// Callers that must NOT derive are documented at their sites (the two status\n234:/// writers, the owner-suspend cascade whose close IS the cleanup, and the wake\n235:/// reconciler's eligibility read) — see REQ-HAZARD-SHELL-STALE-ONLINE.\n236:// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n237-242:pub fn effective_status<'a>(shell_perch: &Path, info: &'a ShellInfo) -> &'a str { … }\n243:\n244:/// [`effective_status`] as the predicate every gate actually asks: is this\n245:/// instance online *in fact*, not merely on paper?\n246:// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n247:pub fn is_shell_online(shell_perch: &Path, info: &ShellInfo) -> bool {\n248:    effective_status(shell_perch, info) == SHELL_STATUS_ONLINE\n249:}\n250:\n251:/// The **parent** segment of an adapter option: the part before the first `:`\n252:/// of a `<adapter>:<profile>` composite (CONTEXT.md §adapter profile). The\n253:/// canonical shell id is minted off this — never the composite — so the id (a\n254:/// perch dir name + endpoint address) stays colon-free and path-safe; the full\n255:/// composite rides only in the `adapter_name` carrier field. Mirrors\n256:/// `spt_runtime::profile::split_option`, inlined here to keep spt-store free of\n257:/// an spt-runtime dependency (the crate graph runs the other way).\n258:fn adapter_parent(option: &str) -> &str {\n259:    option.split_once(':').map_or(option, |(a, _)| a)\n260:}\n261:\n262:/// Parse the `n` out of a canonical `<parent>-<n>` dir name for `parent`.\n263-269:fn instance_ordinal(dir_name: &str, parent: &str) -> Option<u32> { … }\n270:\n271:/// Mint the next canonical id for `adapter` under `owner`: the **smallest\n272:/// free `n`** over existing instance dirs. Online and offline both occupy a\n273:/// slot (every non-torn-down perch counts — the same all-existing rule the\n274:/// instance cap uses); `teardown` removes the dir, so its `n` is reused.\n275:///\n276:/// `adapter` may be a `<adapter>:<profile>` composite; the id is minted off the\n277:/// **parent** segment ([`adapter_parent`]) so two profiles of one adapter share\n278:/// the same `<parent>-<n>` ordinal space (instances are the adapter's resource,\n279:/// not the profile's) and the id never carries the `:`.\n280:// [impl->REQ-EP-5]\n281:// [impl->REQ-HAZARD-ID-CHARSET]\n282-304:pub fn mint_shell_id(owlery: &Path, owner: &str, adapter: &str) -> String { … }\n305:\n306:/// Every shell instance of `owner`: `(canonical_id, record)`, sorted by id\n307:/// for a stable order. Tolerant — a dir without a valid [`ShellInfo`] is\n308:/// skipped (it still *occupies* its mint slot; it just doesn't list).\n309:// [impl->REQ-EP-5]\n310-325:pub fn list_shells(owlery: &Path, owner: &str) -> Vec<(String, ShellInfo)> { … }\n326:\n327:/// Resolve a shell ref — canonical id or alias — to `(canonical_id, record)`.\n328:/// **Canonical-first**: an alias can never shadow a canonical id (spawn/rename\n329:/// refuse minting such an alias, and resolution checks canonical before alias\n330:/// as defense in depth). Aliases are owner-unique, so at most one matches.\n331:// [impl->REQ-EP-5]\n332:pub fn resolve_shell_ref(\n333:    owlery: &Path,\n334:    owner: &str,\n335:    shell_ref: &str,\n336-344:) -> Option<(String, ShellInfo)> { … }\n345:\n346:/// Whether `alias` is free for `owner`: held by no instance's alias and not\n347:/// shadowing any existing canonical id.\n348:fn alias_free(owlery: &Path, owner: &str, alias: &str) -> bool {\n349:    resolve_shell_ref(owlery, owner, alias).is_none()\n350:}\n351:\n352:/// Mint + record a new instance of `adapter` for `owner` (the storage half of\n353:/// `spt shell spawn` — adapter-registration and consent gates are the\n354:/// caller's, per the gate order). Returns the canonical id; the record starts\n355:/// offline.\n356:// [impl->REQ-EP-5]\n357:// [impl->REQ-SHELL-1]\n358:pub fn spawn_record(\n359:    owlery: &Path,\n360:    owner: &str,\n361:    adapter: &str,\n362:    alias: Option<&str>,\n363-377:) -> Result<String, ShellError> { … }\n378:\n379:/// Set/replace the alias on an existing instance (`shell rename`). The new\n380:/// alias must be free for this owner (owner-unique, never shadowing a\n381:/// canonical id).\n382:// [impl->REQ-EP-5]\n383:pub fn rename_shell(\n384:    owlery: &Path,\n385:    owner: &str,\n386:    shell_ref: &str,\n387:    alias: &str,\n388-400:) -> Result<String, ShellError> { … }\n401:\n402:/// Destroy an instance: remove its perch dir entirely — frees the mint slot\n403:/// and the alias (the lifecycle's torn-down terminal; the D4 link-break/\n404:/// pre-close machinery runs before this in the hosted path).\n405:// [impl->REQ-EP-5]\n406-411:pub fn teardown_shell(owlery: &Path, owner: &str, shell_ref: &str) -> Result<String, ShellError> { … }\n412:\n413:#[cfg(test)]\n414-726:mod tests { … }\n\n[…477ln elided; re-read needed ranges, e.g. .worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs:25-27,43-56]"}],"details":{"displayContent":{"text":"//! Shell-instance perch records (M5-D3a — CONTEXT §Shell model,\n//! `docs/STORAGE.md` §Shells in the layout).\n//!\n//! A shell perch is **not** an agent perch: its `info.json` carries exactly\n//! `type=Shell, owner, adapter_name, status, alias?` — a dedicated\n//! [`ShellInfo`] shape, deliberately distinct from [`crate::info::InfoJson`],\n//! so the agent-perch readers (liveness, registry stale-clean, the consent\n//! MRA scan) stay blind to shells by construction. Capabilities are **never**\n//! duplicated here — they resolve from the shell adapter manifest by\n//! `adapter_name`.\n//!\n//! **Identity model (REQ-EP-5):** `spt shell spawn` *mints* a new instance —\n//! the immutable canonical id `<adapter>-<n>` ([`mint_shell_id`]: smallest\n//! free `n` over **existing** instance dirs; online and offline both occupy,\n//! `teardown` frees the slot). The optional **alias** is a per-instance,\n//! owner-unique display/address overlay set at spawn or by `shell rename` —\n//! interchangeable with the canonical id for addressing\n//! ([`resolve_shell_ref`], canonical-first), never obscuring `adapter_name`.\n//!\n//! Torn-read stance mirrors `info.rs` (KNOWN-HAZARDS 1.2): writers go through\n//! the atomic rename; readers tolerate failure and return `None`.\n// [impl->REQ-EP-5]\n\nuse serde::{Deserialize, Serialize};\n…\nuse crate::perch;\n\n/// `status` value: the shell binary is linked and running.\npub const SHELL_STATUS_ONLINE: &str = \"online\";\n/// `status` value: the perch exists, no binary linked (re-linkable if the\n/// adapter is `persistent`; the spawn-time initial state until D3b binds).\npub const SHELL_STATUS_OFFLINE: &str = \"offline\";\n/// The fixed `type` tag on every shell perch record.\npub const SHELL_TYPE: &str = \"Shell\";\n\n/// On-disk shape of a shell perch's `info.json` — the full field set, by\n/// contract (STORAGE.md: \"carries only `type=Shell`, `owner`, `adapter_name`,\n/// `status`, and an optional `alias`\").\n// [impl->REQ-SHELL-1]\n#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]\npub struct ShellInfo { … }\n\nimpl ShellInfo { … }\n\n/// Shell-instance model failures — CLI-facing, so they carry the why.\n#[derive(Debug)]\npub enum ShellError { … }\n\nimpl std::fmt::Display for ShellError { … }\n\nimpl From<std::io::Error> for ShellError { … }\n\n/// Read a shell perch's record. Tolerant (`None` on missing/corrupt — the\n/// list path skips, never panics) and shape-checked: a record whose `type`\n/// isn't [`SHELL_TYPE`] is not a shell perch.\npub fn read_shell_info(shell_perch: &Path) -> Option<ShellInfo> { … }\n\n/// Write a shell perch's record (atomic rename — the 1.2 torn-read stance).\n/// Creates the perch dir.\npub fn write_shell_info(shell_perch: &Path, info: &ShellInfo) -> std::io::Result<()> { … }\n\n/// The launched binary's recorded pid, one file per instance perch. Written by\n/// the launch, removed by the close — and the ONLY on-disk evidence that the\n/// process a record calls `online` still exists.\npub const SHELL_PID_FILE: &str = \"shell.pid\";\n\n/// The recorded launch pid, if the perch parks a parseable one.\npub fn read_shell_pid(shell_perch: &Path) -> Option<u32> { … }\n\n/// `<shell_perch>/shell.launch.json` — the birth stamp parked beside the pid at\n/// launch (BAROMETER W2, releases#78).\npub const SHELL_LAUNCH_FILE: &str = \"shell.launch.json\";\n\n/// What a launch recorded about the process it started.\n///\n/// TWO VALUES, ANSWERING TWO DIFFERENT QUESTIONS, and keeping them apart is the\n/// whole point of the shape:\n///\n/// - `pid_started_at` is the platform's NATIVE start-time value, used for one\n///   question only — the same-pid-different-process PAIR test within a single\n///   boot ([`crate::liveness::relay_liveness`]). It is deliberately never\n///   compared across boots, because it is not the same kind of number on every\n///   platform: on Windows it is an absolute FILETIME, but on Linux it is field\n///   22 of `/proc/<pid>/stat`, i.e. JIFFIES SINCE BOOT, which resets at every\n///   boot. A value recorded before a restart is therefore indistinguishable\n///   from a fresh one after it, and any cross-boot comparison of this field\n///   would be correct on Windows and silently wrong on Linux.\n/// - `launched_ms` is an ABSOLUTE wall-clock stamp (epoch-ms), used by the\n///   nonpersistent watcher's cross-boot freeze. Persistent restoration does not\n///   gate on launch age; the native birth stamp still authenticates liveness.\n#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]\npub struct ShellLaunch { … }\n\n/// Record the birth stamp for a just-launched `pid`. Best-effort: a stamp that\n/// cannot be written must never fail the launch — a missing stamp degrades the\n/// probe to its pre-existing fail-toward-alive behaviour, which is the safe\n/// direction, while a failed launch is a real outage.\n// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\npub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) { … }\n\n/// Read the birth stamp, if this instance was launched by a build that parks one.\n/// Absent or unparseable ⇒ `None`, which every consumer treats as \"no stamp to\n/// compare\" rather than as a fault.\npub fn read_shell_launch(shell_perch: &Path) -> Option<ShellLaunch> { … }\n\n/// **The** discriminant behind [`effective_status`]: is this instance's recorded\n/// binary *provably* gone? Narrow on purpose — true only when the perch parks a\n/// pid, it parses non-zero, and the process is not alive.\n///\n/// Everything else reads **alive**: an absent or unparseable pid file, and the\n/// `0` a broker-hosted spawn records when its backend exposed no pid\n/// ([`crate::proc::is_process_alive`] already reads 0 as dead, so the explicit\n/// filter here is what keeps a pid-less backend from being declared dead by this\n/// resolver). That fail-toward-alive stance mirrors `liveness.rs`'s interim\n/// parity: this predicate exists to catch a *corpse*, never to guess at a\n/// backend it cannot see.\n///\n/// Recycled pids read alive, so a heal can be **missed** but never **mis-fired**\n/// — the failure direction is \"stays stale\", never \"tears down a live instance\".\n// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\npub fn shell_pid_provably_dead(shell_perch: &Path) -> bool { … }\n\n/// A shell instance's **derived** status — the shell-side twin of\n/// `liveness::is_perch_alive` (REQ-HAZARD-DAEMON-HOSTED-LIVENESS gave agent\n/// perches exactly this; shells never got it).\n///\n/// The recorded `status` has exactly two writers — the bind handshake (→online)\n/// and `spt_daemon::shellhost::close_shell` (→offline) — and `close_shell` runs\n/// on the **link-break** path alone. A binary that dies\n/// abruptly (force-kill, crash, OOM) breaks no link, so nothing ever writes the\n/// flip and the record says `online` forever. Deriving closes that hole without\n/// adding a supervisor: `online` + a provably-dead pid reads\n/// [`SHELL_STATUS_OFFLINE`]; every other case is the recorded value verbatim.\n///\n/// Callers that must NOT derive are documented at their sites (the two status\n/// writers, the owner-suspend cascade whose close IS the cleanup, and the wake\n/// reconciler's eligibility read) — see REQ-HAZARD-SHELL-STALE-ONLINE.\n// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\npub fn effective_status<'a>(shell_perch: &Path, info: &'a ShellInfo) -> &'a str { … }\n\n/// [`effective_status`] as the predicate every gate actually asks: is this\n/// instance online *in fact*, not merely on paper?\n// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\npub fn is_shell_online(shell_perch: &Path, info: &ShellInfo) -> bool {\n    effective_status(shell_perch, info) == SHELL_STATUS_ONLINE\n}\n\n/// The **parent** segment of an adapter option: the part before the first `:`\n/// of a `<adapter>:<profile>` composite (CONTEXT.md §adapter profile). The\n/// canonical shell id is minted off this — never the composite — so the id (a\n/// perch dir name + endpoint address) stays colon-free and path-safe; the full\n/// composite rides only in the `adapter_name` carrier field. Mirrors\n/// `spt_runtime::profile::split_option`, inlined here to keep spt-store free of\n/// an spt-runtime dependency (the crate graph runs the other way).\nfn adapter_parent(option: &str) -> &str {\n    option.split_once(':').map_or(option, |(a, _)| a)\n}\n\n/// Parse the `n` out of a canonical `<parent>-<n>` dir name for `parent`.\nfn instance_ordinal(dir_name: &str, parent: &str) -> Option<u32> { … }\n\n/// Mint the next canonical id for `adapter` under `owner`: the **smallest\n/// free `n`** over existing instance dirs. Online and offline both occupy a\n/// slot (every non-torn-down perch counts — the same all-existing rule the\n/// instance cap uses); `teardown` removes the dir, so its `n` is reused.\n///\n/// `adapter` may be a `<adapter>:<profile>` composite; the id is minted off the\n/// **parent** segment ([`adapter_parent`]) so two profiles of one adapter share\n/// the same `<parent>-<n>` ordinal space (instances are the adapter's resource,\n/// not the profile's) and the id never carries the `:`.\n// [impl->REQ-EP-5]\n// [impl->REQ-HAZARD-ID-CHARSET]\npub fn mint_shell_id(owlery: &Path, owner: &str, adapter: &str) -> String { … }\n\n/// Every shell instance of `owner`: `(canonical_id, record)`, sorted by id\n/// for a stable order. Tolerant — a dir without a valid [`ShellInfo`] is\n/// skipped (it still *occupies* its mint slot; it just doesn't list).\n// [impl->REQ-EP-5]\npub fn list_shells(owlery: &Path, owner: &str) -> Vec<(String, ShellInfo)> { … }\n\n/// Resolve a shell ref — canonical id or alias — to `(canonical_id, record)`.\n/// **Canonical-first**: an alias can never shadow a canonical id (spawn/rename\n/// refuse minting such an alias, and resolution checks canonical before alias\n/// as defense in depth). Aliases are owner-unique, so at most one matches.\n// [impl->REQ-EP-5]\npub fn resolve_shell_ref(\n    owlery: &Path,\n    owner: &str,\n    shell_ref: &str,\n) -> Option<(String, ShellInfo)> { … }\n\n/// Whether `alias` is free for `owner`: held by no instance's alias and not\n/// shadowing any existing canonical id.\nfn alias_free(owlery: &Path, owner: &str, alias: &str) -> bool {\n    resolve_shell_ref(owlery, owner, alias).is_none()\n}\n\n/// Mint + record a new instance of `adapter` for `owner` (the storage half of\n/// `spt shell spawn` — adapter-registration and consent gates are the\n/// caller's, per the gate order). Returns the canonical id; the record starts\n/// offline.\n// [impl->REQ-EP-5]\n// [impl->REQ-SHELL-1]\npub fn spawn_record(\n    owlery: &Path,\n    owner: &str,\n    adapter: &str,\n    alias: Option<&str>,\n) -> Result<String, ShellError> { … }\n\n/// Set/replace the alias on an existing instance (`shell rename`). The new\n/// alias must be free for this owner (owner-unique, never shadowing a\n/// canonical id).\n// [impl->REQ-EP-5]\npub fn rename_shell(\n    owlery: &Path,\n    owner: &str,\n    shell_ref: &str,\n    alias: &str,\n) -> Result<String, ShellError> { … }\n\n/// Destroy an instance: remove its perch dir entirely — frees the mint slot\n/// and the alias (the lifecycle's torn-down terminal; the D4 link-break/\n/// pre-close machinery runs before this in the hosted path).\n// [impl->REQ-EP-5]\npub fn teardown_shell(owlery: &Path, owner: &str, shell_ref: &str) -> Result<String, ShellError> { … }\n\n#[cfg(test)]\nmod tests { … }","startLine":1},"summary":{"lines":229,"elidedSpans":22,"elidedLines":477},"fileSize":33627,"meta":{"source":{"type":"path","value":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\shellinfo.rs"}}},"isError":false,"timestamp":1789002202216}}
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{"type":"message","id":"4e4662a3","parentId":"dabe995e","timestamp":"2026-09-10T01:03:29.982Z","message":{"role":"toolResult","toolCallId":"call_qjW3y7bRpRydmkgjc45GDnYB|fc_0053347aa1a1a4a3016aa201e1ddec87d1b99df6b099511289","toolName":"read","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#D341]\n116:/// The launched binary's recorded pid, one file per instance perch. Written by\n117:/// the launch, removed by the close — and the ONLY on-disk evidence that the\n118:/// process a record calls `online` still exists.\n119:pub const SHELL_PID_FILE: &str = \"shell.pid\";\n120:\n121:/// The recorded launch pid, if the perch parks a parseable one.\n122:pub fn read_shell_pid(shell_perch: &Path) -> Option<u32> {\n123:    std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n124:        .ok()?\n125:        .trim()\n126:        .parse()\n127:        .ok()\n128:}\n129:\n130:/// `<shell_perch>/shell.launch.json` — the birth stamp parked beside the pid at\n131:/// launch (BAROMETER W2, releases#78).\n132:pub const SHELL_LAUNCH_FILE: &str = \"shell.launch.json\";\n133:\n134:/// What a launch recorded about the process it started.\n135:///\n136:/// TWO VALUES, ANSWERING TWO DIFFERENT QUESTIONS, and keeping them apart is the\n137:/// whole point of the shape:\n138:///\n139:/// - `pid_started_at` is the platform's NATIVE start-time value, used for one\n140:///   question only — the same-pid-different-process PAIR test within a single\n141:///   boot ([`crate::liveness::relay_liveness`]). It is deliberately never\n142:///   compared across boots, because it is not the same kind of number on every\n143:///   platform: on Windows it is an absolute FILETIME, but on Linux it is field\n144:///   22 of `/proc/<pid>/stat`, i.e. JIFFIES SINCE BOOT, which resets at every\n145:///   boot. A value recorded before a restart is therefore indistinguishable\n146:///   from a fresh one after it, and any cross-boot comparison of this field\n147:///   would be correct on Windows and silently wrong on Linux.\n148:/// - `launched_ms` is an ABSOLUTE wall-clock stamp (epoch-ms), used by the\n149:///   nonpersistent watcher's cross-boot freeze. Persistent restoration does not\n150:///   gate on launch age; the native birth stamp still authenticates liveness.\n151:#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]\n152:pub struct ShellLaunch {\n153:    /// The native start-time of the launched pid, when the platform offers one.\n154:    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n155:    pub pid_started_at: Option<u64>,\n156:    /// Wall-clock epoch-ms at which this instance was launched.\n157:    pub launched_ms: u64,\n158:}\n159:\n160:/// Record the birth stamp for a just-launched `pid`. Best-effort: a stamp that\n161:/// cannot be written must never fail the launch — a missing stamp degrades the\n162:/// probe to its pre-existing fail-toward-alive behaviour, which is the safe\n163:/// direction, while a failed launch is a real outage.\n164:// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n165:pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) {\n166:    let launch = ShellLaunch {\n167:        pid_started_at: crate::proc::process_started_at(pid),\n168:        launched_ms: now_ms,\n169:    };\n170:    if let Ok(json) = serde_json::to_string_pretty(&launch) {\n171:        let _ = atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json);\n172:    }\n173:}\n174:\n175:/// Read the birth stamp, if this instance was launched by a build that parks one.\n176:/// Absent or unparseable ⇒ `None`, which every consumer treats as \"no stamp to\n177:/// compare\" rather than as a fault.\n178:pub fn read_shell_launch(shell_perch: &Path) -> Option<ShellLaunch> {\n179:    let raw = std::fs::read_to_string(shell_perch.join(SHELL_LAUNCH_FILE)).ok()?;\n180:    serde_json::from_str(&raw).ok()\n181:}\n182:\n183:/// **The** discriminant behind [`effective_status`]: is this instance's recorded\n184:/// binary *provably* gone? Narrow on purpose — true only when the perch parks a\n185:/// pid, it parses non-zero, and the process is not alive.\n186:///\n187:/// Everything else reads **alive**: an absent or unparseable pid file, and the\n188:/// `0` a broker-hosted spawn records when its backend exposed no pid\n189:/// ([`crate::proc::is_process_alive`] already reads 0 as dead, so the explicit\n190:/// filter here is what keeps a pid-less backend from being declared dead by this\n191:/// resolver). That fail-toward-alive stance mirrors `liveness.rs`'s interim\n192:/// parity: this predicate exists to catch a *corpse*, never to guess at a\n193:/// backend it cannot see.\n194:///\n195:/// Recycled pids read alive, so a heal can be **missed** but never **mis-fired**\n196:/// — the failure direction is \"stays stale\", never \"tears down a live instance\".\n197:// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n198:pub fn shell_pid_provably_dead(shell_perch: &Path) -> bool {\n199:    let Some(pid) = read_shell_pid(shell_perch).filter(|&pid| pid != 0) else {\n200:        return false;\n201:    };\n202:    // BAROMETER W2 (releases#78): probe pid AND birth stamp, not the pid alone.\n203:    // A pid namespace resets at boot, so a corpse pid can be REUSED by an\n204:    // unrelated process started after the restart; under bare-pid liveness that\n205:    // reads ALIVE, the derived status reads online, and `relink` then refuses\n206:    // SHELL_ALREADY_ONLINE -- the one command that recovers the instance\n207:    // refusing on the very state that is wrong. The PAIR test (same pid,\n208:    // different start time) is what tells a reused pid from our own process.\n209:    //\n210:    // The stance is unchanged where there is no stamp to compare: an instance\n211:    // launched before this field existed, or a backend that exposed no start\n212:    // time, still falls back to plain absence and fails toward ALIVE.\n213:    // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n214:    let birth = read_shell_launch(shell_perch).and_then(|l| l.pid_started_at);\n215:    matches!(\n216:        crate::liveness::relay_liveness(Some(pid), birth),\n217:        crate::liveness::RelayLiveness::Gone\n218:    )\n219:}\n…\n413:#[cfg(test)]\n414:mod tests {\n415:    use super::*;\n416:\n417:    fn spawn(owlery: &Path, owner: &str, adapter: &str, alias: Option<&str>) -> String {\n418:        spawn_record(owlery, owner, adapter, alias).expect(\"spawn_record\")\n419:    }\n420:\n421:    /// A pid that is never a real allocation (above Linux `pid_max` ~4.2M and\n422:    /// Windows ranges; positive as i32) — deterministic, no pid-reuse flake.\n423:    /// Same constant `liveness.rs` uses for the agent-perch twin of this test.\n424:    const DEAD_PID: u32 = 2_000_000_000;\n425:\n426:    /// An `online` instance perch parking `pid` (or nothing at all).\n427:    fn online_perch(pid: Option<&str>) -> tempfile::TempDir {\n428:        let d = tempfile::tempdir().unwrap();\n429:        let mut info = ShellInfo::new(\"doyle\", \"alchemy\");\n430:        info.status = SHELL_STATUS_ONLINE.to_string();\n431:        write_shell_info(d.path(), &info).unwrap();\n432:        if let Some(p) = pid {\n433:            std::fs::write(d.path().join(SHELL_PID_FILE), p).unwrap();\n434:        }\n435:        d\n436:    }\n437:\n438:    fn status_of(d: &tempfile::TempDir) -> String {\n439:        let info = read_shell_info(d.path()).unwrap();\n440:        effective_status(d.path(), &info).to_string()\n441:    }\n442:\n443:    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE] the reused-pid row: a LIVE pid whose\n444:    // birth stamp does not match what the launch recorded reads GONE.\n445:    //\n446:    // THIS IS THE ROW THE SHIPPED PROBE CANNOT PASS, and it is the whole reason the\n447:    // stamp exists. Bare-pid liveness answers \"is something running under this\n448:    // number\", which after a reboot is a question about an unrelated process: the\n449:    // pid namespace reset, some other program took the number, the corpse reads\n450:    // ALIVE, the derived status reads online, and `relink` then refuses\n451:    // SHELL_ALREADY_ONLINE on the one instance that needs recovering.\n452:    //\n453:    // The fixture uses OUR OWN pid, which is genuinely alive, with a recorded birth\n454:    // that cannot be ours — so any implementation that consults liveness alone\n455:    // reports alive here and fails, while the pair test reports gone.\n456:    #[test]\n457:    fn a_live_pid_with_a_foreign_birth_stamp_reads_gone() {\n458:        let d = online_perch(Some(&std::process::id().to_string()));\n459:        // Sanity: without a stamp this instance reads ALIVE — i.e. the fixture is\n460:        // not accidentally proving the point through some other absence.\n461:        assert!(\n462:            !shell_pid_provably_dead(d.path()),\n463:            \"no stamp parked ⇒ the pre-existing fail-toward-alive stance holds\"\n464:        );\n465:\n466:        // Now record a launch whose start-time is not this process's.\n467:        let bogus = ShellLaunch {\n468:            pid_started_at: Some(1),\n469:            launched_ms: 1_000,\n470:        };\n471:        std::fs::write(\n472:            d.path().join(SHELL_LAUNCH_FILE),\n473:            serde_json::to_string(&bogus).unwrap(),\n474:        )\n475:        .unwrap();\n476:        assert!(\n477:            shell_pid_provably_dead(d.path()),\n478:            \"same pid, different process ⇒ our instance is gone, however alive that \\\n479:             pid looks\"\n480:        );\n481:        assert_eq!(\n482:            status_of(&d),\n483:            SHELL_STATUS_OFFLINE,\n484:            \"and the derived status follows, which is what unblocks relink\"\n485:        );\n486:    }\n487:\n488:    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE] the paired half: a live pid whose\n489:    // stamp DOES match is held, so the stamp cannot be satisfied by an\n490:    // implementation that simply calls every stamped instance dead.\n491:    #[test]\n492:    fn a_live_pid_with_its_own_birth_stamp_is_held() {\n493:        let d = online_perch(Some(&std::process::id().to_string()));\n494:        record_shell_launch(d.path(), std::process::id(), 1_000);\n495:        let parked = read_shell_launch(d.path()).expect(\"a launch stamp was parked\");\n496:        assert_eq!(parked.launched_ms, 1_000, \"the absolute stamp round-trips\");\n497:\n498:        // On a platform with no start-time oracle the stamp is None and the pair\n499:        // test cannot fire; the row still must not report a live process dead.\n500:        assert!(\n501:            !shell_pid_provably_dead(d.path()),\n502:            \"our own live process, stamped by its own launch, is not a corpse\"\n503:        );\n504:        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n505:    }\n506:\n507:    // [unit->REQ-HAZARD-SHELL-STALE-ONLINE] the whole discriminant matrix. The\n508:    // ONE case that derives offline is a parked, non-zero, dead pid — flynn's\n509:    // field shape: the binary was force-killed, no link broke, so `close_shell`\n510:    // never ran and the record still says `online`. Everything else is\n511:    // fail-toward-alive, so a backend this resolver cannot see is never declared\n512:    // dead: a live pid, an absent pid file, the `0` a broker-hosted spawn records\n513:    // when its backend exposed no pid, and an unparseable pid all stay online.\n514:    #[test]\n515:    fn online_derives_offline_only_for_a_provably_dead_pid() {\n516:        let dead = online_perch(Some(&DEAD_PID.to_string()));\n517:        assert!(shell_pid_provably_dead(dead.path()));\n518:        assert_eq!(\n519:            status_of(&dead),\n520:            SHELL_STATUS_OFFLINE,\n521:            \"a force-killed binary must not read online forever\"\n522:        );\n523:\n524:        let live = online_perch(Some(&std::process::id().to_string()));\n525:        assert!(!shell_pid_provably_dead(live.path()));\n526:        assert_eq!(status_of(&live), SHELL_STATUS_ONLINE, \"a live pid is online\");\n527:\n528:        // The fail-toward-alive arms — none of these is EVIDENCE of a corpse.\n529:        for (label, pid) in [\n530:            (\"absent pid file\", None),\n531:            (\"broker-hosted pid 0\", Some(\"0\")),\n532:            (\"unparseable pid\", Some(\"not-a-pid\")),\n533:            (\"empty pid file\", Some(\"\")),\n534:        ] {\n535:            let d = online_perch(pid);\n536:            assert!(\n537:                !shell_pid_provably_dead(d.path()),\n538:                \"{label} is not proof of death\"\n539:            );\n540:            assert_eq!(status_of(&d), SHELL_STATUS_ONLINE, \"{label} stays online\");\n541:        }\n542:    }\n543:\n544:    // [unit->REQ-HAZARD-SHELL-STALE-ONLINE] deriving only ever turns a false\n545:    // ONLINE into offline — it never invents an online. A recorded-offline\n546:    // instance stays offline whatever its pid file says (including a live pid,\n547:    // which a relaunch-then-crash sequence can leave behind), so `relink`'s gate\n548:    // and the wake arm can never be talked out of recovering one.\n549:    #[test]\n550:    fn derivation_never_promotes_offline_to_online() {\n551:        let d = tempfile::tempdir().unwrap();\n552:        write_shell_info(d.path(), &ShellInfo::new(\"doyle\", \"alchemy\")).unwrap();\n553:        std::fs::write(\n554:            d.path().join(SHELL_PID_FILE),\n555:            std::process::id().to_string(),\n556:        )\n557:        .unwrap();\n558:\n559:        let info = read_shell_info(d.path()).unwrap();\n560:        assert_eq!(info.status, SHELL_STATUS_OFFLINE, \"recorded offline\");\n561:        assert_eq!(\n562:            effective_status(d.path(), &info),\n563:            SHELL_STATUS_OFFLINE,\n564:            \"a live pid must not promote a recorded-offline instance to online\"\n565:        );\n566:        assert!(!is_shell_online(d.path(), &info));\n567:    }\n568:\n569:    // [unit->REQ-EP-5] minting: 0,1,2…; teardown frees the slot and the next\n570:    // spawn reuses it; offline instances still occupy theirs; a foreign\n571:    // adapter's instances never collide with this adapter's numbering.\n572:    #[test]\n573:    fn mint_smallest_free_and_teardown_frees() {\n574:        let tmp = tempfile::tempdir().unwrap();\n575:        let owlery = tmp.path();\n576:\n577:        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-0\");\n578:        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-1\");\n579:        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-2\");\n580:        // A different adapter numbers independently.\n581:        assert_eq!(spawn(owlery, \"doyle\", \"OsNotify\", None), \"OsNotify-0\");\n582:\n583:        // Teardown the middle instance — its slot is the smallest free.\n584:        teardown_shell(owlery, \"doyle\", \"GameRobot-1\").unwrap();\n585:        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-1\");\n586:        // All occupied again (every record is offline — offline occupies).\n587:        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-3\");\n588:        // Another owner's numbering is its own.\n589:        assert_eq!(spawn(owlery, \"ling\", \"GameRobot\", None), \"GameRobot-0\");\n590:    }\n591:\n592:    // [unit->REQ-HAZARD-ID-CHARSET] [unit->REQ-MANIFEST-2] a composite adapter\n593:    // option (`<adapter>:<profile>`) mints a **colon-free** `<parent>-<n>` id\n594:    // (`:` is a reserved address delimiter — it must never leak into the id /\n595:    // perch dir name), while the full composite rides in `adapter_name`. Two\n596:    // profiles of one adapter share the parent's ordinal space — instances are\n597:    // the adapter's resource, not the profile's.\n598:    #[test]\n599:    fn composite_option_mints_colon_free_id_and_carries_the_composite() {\n600:        let tmp = tempfile::tempdir().unwrap();\n601:        let owlery = tmp.path();\n602:\n603:        // Profiled spawn: id is parent-based + colon-free; carrier is the composite.\n604:        let id0 = spawn(owlery, \"doyle\", \"claude-spt:work\", None);\n605:        assert_eq!(id0, \"claude-spt-0\", \"id minted off the parent, no ':'\");\n606:        assert!(!id0.contains(':'), \"reserved delimiter never in the id\");\n607:        let info0 = resolve_shell_ref(owlery, \"doyle\", &id0).unwrap().1;\n608:        assert_eq!(info0.adapter_name, \"claude-spt:work\", \"composite carried verbatim\");\n609:\n610:        // A different profile of the SAME parent shares the ordinal space…\n611:        let id1 = spawn(owlery, \"doyle\", \"claude-spt:play\", None);\n612:        assert_eq!(id1, \"claude-spt-1\", \"profiles of one parent share <parent>-<n>\");\n613:        // …and a bare-parent spawn occupies the same space too.\n614:        let id2 = spawn(owlery, \"doyle\", \"claude-spt\", None);\n615:        assert_eq!(id2, \"claude-spt-2\");\n616:\n617:        // The id resolves back (it is a valid colon-free perch dir name).\n618:        assert!(resolve_shell_ref(owlery, \"doyle\", \"claude-spt-0\").is_some());\n619:    }\n620:\n621:    // [unit->REQ-EP-5] aliasing: set at spawn; owner-unique (duplicate\n622:    // refused, other owners unaffected); rename moves it; alias and canonical\n623:    // id resolve to the same instance; an alias shadowing a canonical id is\n624:    // refused; list never loses adapter_name behind the alias.\n625:    #[test]\n626:    fn alias_unique_rename_and_resolution() {\n627:        let tmp = tempfile::tempdir().unwrap();\n628:        let owlery = tmp.path();\n629:\n630:        let id = spawn(owlery, \"doyle\", \"GameRobot\", Some(\"TempleKeeper\"));\n631:        assert_eq!(id, \"GameRobot-0\");\n632:\n633:        // Both forms address the same instance.\n634:        let by_alias = resolve_shell_ref(owlery, \"doyle\", \"TempleKeeper\").unwrap();\n635:        let by_id = resolve_shell_ref(owlery, \"doyle\", \"GameRobot-0\").unwrap();\n636:        assert_eq!(by_alias.0, \"GameRobot-0\");\n637:        assert_eq!(by_alias, by_id);\n638:        // The alias never obscures what the shell is.\n639:        assert_eq!(by_alias.1.adapter_name, \"GameRobot\");\n640:\n641:        // Duplicate alias for the same owner refuses…\n642:        assert!(matches!(\n643:            spawn_record(owlery, \"doyle\", \"GameRobot\", Some(\"TempleKeeper\")),\n644:            Err(ShellError::AliasTaken(_))\n645:        ));\n646:        // …but another owner may hold the same label.\n647:        spawn_record(owlery, \"ling\", \"GameRobot\", Some(\"TempleKeeper\")).unwrap();\n648:\n649:        // An alias that shadows an existing canonical id refuses.\n650:        assert!(matches!(\n651:            spawn_record(owlery, \"doyle\", \"OsNotify\", Some(\"GameRobot-0\")),\n652:            Err(ShellError::AliasTaken(_))\n653:        ));\n654:\n655:        // Rename moves the alias; the old label stops resolving, the new one\n656:        // reaches the same instance; renaming onto a taken alias refuses;\n657:        // re-asserting an instance's own alias is idempotent.\n658:        let second = spawn(owlery, \"doyle\", \"GameRobot\", None);\n659:        assert!(matches!(\n660:            rename_shell(owlery, \"doyle\", &second, \"TempleKeeper\"),\n661:            Err(ShellError::AliasTaken(_))\n662:        ));\n663:        rename_shell(owlery, \"doyle\", \"TempleKeeper\", \"Keeper\").unwrap();\n664:        assert!(resolve_shell_ref(owlery, \"doyle\", \"TempleKeeper\").is_none());\n665:        assert_eq!(\n666:            resolve_shell_ref(owlery, \"doyle\", \"Keeper\").unwrap().0,\n667:            \"GameRobot-0\"\n668:        );\n669:        rename_shell(owlery, \"doyle\", \"Keeper\", \"Keeper\").unwrap();\n670:\n671:        // Unknown ref errs.\n672:        assert!(matches!(\n673:            rename_shell(owlery, \"doyle\", \"ghost\", \"X\"),\n674:            Err(ShellError::NotFound(_))\n675:        ));\n676:        assert!(matches!(\n677:            teardown_shell(owlery, \"doyle\", \"ghost\"),\n678:            Err(ShellError::NotFound(_))\n679:        ));\n680:    }\n681:\n682:    // [unit->REQ-SHELL-1] the record roundtrips with the full contracted\n683:    // field set and nothing else; a corrupt/foreign info.json is tolerated on\n684:    // list (skipped, never a panic) while still occupying its mint slot.\n685:    #[test]\n686:    fn shellinfo_roundtrip_and_corrupt_tolerance() {\n687:        let tmp = tempfile::tempdir().unwrap();\n688:        let owlery = tmp.path();\n689:\n690:        spawn(owlery, \"doyle\", \"GameRobot\", Some(\"TempleKeeper\"));\n691:        let p = perch::resolve_shell_perch_path_in(owlery, \"doyle\", \"GameRobot-0\");\n692:        let info = read_shell_info(&p).unwrap();\n693:        assert_eq!(info.r#type, SHELL_TYPE);\n694:        assert_eq!(info.owner, \"doyle\");\n695:        assert_eq!(info.adapter_name, \"GameRobot\");\n696:        assert_eq!(info.status, SHELL_STATUS_OFFLINE);\n697:        assert_eq!(info.alias.as_deref(), Some(\"TempleKeeper\"));\n698:        // The serialized shape is exactly the contracted field set.\n699:        let raw: serde_json::Value =\n700:            serde_json::from_str(&std::fs::read_to_string(perch::info_file_at(&p)).unwrap())\n701:                .unwrap();\n702:        let mut keys: Vec<_> = raw.as_object().unwrap().keys().cloned().collect();\n703:        keys.sort();\n704:        assert_eq!(keys, [\"adapter_name\", \"alias\", \"owner\", \"status\", \"type\"]);\n705:\n706:        // Corrupt a second instance's record: it drops from list (tolerant)…\n707:        spawn(owlery, \"doyle\", \"GameRobot\", None);\n708:        let p1 = perch::resolve_shell_perch_path_in(owlery, \"doyle\", \"GameRobot-1\");\n709:        std::fs::write(perch::info_file_at(&p1), \"{not json\").unwrap();\n710:        let listed = list_shells(owlery, \"doyle\");\n711:        assert_eq!(listed.len(), 1);\n712:        assert_eq!(listed[0].0, \"GameRobot-0\");\n713:        // …an agent-shaped info.json is not a shell record either…\n714:        std::fs::write(\n715:            perch::info_file_at(&p1),\n716:            r#\"{\"type\":\"LiveAgent\",\"owner\":\"x\",\"adapter_name\":\"y\",\"status\":\"online\"}\"#,\n717:        )\n718:        .unwrap();\n719:        assert!(read_shell_info(&p1).is_none());\n720:        // …but the dir still occupies its mint slot.\n721:        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-2\");\n722:\n723:        // No shells dir at all → empty list, no panic.\n724:        assert!(list_shells(owlery, \"nobody\").is_empty());\n725:    }\n726:}"}],"details":{"displayContent":{"text":"/// The launched binary's recorded pid, one file per instance perch. Written by\n/// the launch, removed by the close — and the ONLY on-disk evidence that the\n/// process a record calls `online` still exists.\npub const SHELL_PID_FILE: &str = \"shell.pid\";\n\n/// The recorded launch pid, if the perch parks a parseable one.\npub fn read_shell_pid(shell_perch: &Path) -> Option<u32> {\n    std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n        .ok()?\n        .trim()\n        .parse()\n        .ok()\n}\n\n/// `<shell_perch>/shell.launch.json` — the birth stamp parked beside the pid at\n/// launch (BAROMETER W2, releases#78).\npub const SHELL_LAUNCH_FILE: &str = \"shell.launch.json\";\n\n/// What a launch recorded about the process it started.\n///\n/// TWO VALUES, ANSWERING TWO DIFFERENT QUESTIONS, and keeping them apart is the\n/// whole point of the shape:\n///\n/// - `pid_started_at` is the platform's NATIVE start-time value, used for one\n///   question only — the same-pid-different-process PAIR test within a single\n///   boot ([`crate::liveness::relay_liveness`]). It is deliberately never\n///   compared across boots, because it is not the same kind of number on every\n///   platform: on Windows it is an absolute FILETIME, but on Linux it is field\n///   22 of `/proc/<pid>/stat`, i.e. JIFFIES SINCE BOOT, which resets at every\n///   boot. A value recorded before a restart is therefore indistinguishable\n///   from a fresh one after it, and any cross-boot comparison of this field\n///   would be correct on Windows and silently wrong on Linux.\n/// - `launched_ms` is an ABSOLUTE wall-clock stamp (epoch-ms), used by the\n///   nonpersistent watcher's cross-boot freeze. Persistent restoration does not\n///   gate on launch age; the native birth stamp still authenticates liveness.\n#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]\npub struct ShellLaunch {\n    /// The native start-time of the launched pid, when the platform offers one.\n    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n    pub pid_started_at: Option<u64>,\n    /// Wall-clock epoch-ms at which this instance was launched.\n    pub launched_ms: u64,\n}\n\n/// Record the birth stamp for a just-launched `pid`. Best-effort: a stamp that\n/// cannot be written must never fail the launch — a missing stamp degrades the\n/// probe to its pre-existing fail-toward-alive behaviour, which is the safe\n/// direction, while a failed launch is a real outage.\n// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\npub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) {\n    let launch = ShellLaunch {\n        pid_started_at: crate::proc::process_started_at(pid),\n        launched_ms: now_ms,\n    };\n    if let Ok(json) = serde_json::to_string_pretty(&launch) {\n        let _ = atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json);\n    }\n}\n\n/// Read the birth stamp, if this instance was launched by a build that parks one.\n/// Absent or unparseable ⇒ `None`, which every consumer treats as \"no stamp to\n/// compare\" rather than as a fault.\npub fn read_shell_launch(shell_perch: &Path) -> Option<ShellLaunch> {\n    let raw = std::fs::read_to_string(shell_perch.join(SHELL_LAUNCH_FILE)).ok()?;\n    serde_json::from_str(&raw).ok()\n}\n\n/// **The** discriminant behind [`effective_status`]: is this instance's recorded\n/// binary *provably* gone? Narrow on purpose — true only when the perch parks a\n/// pid, it parses non-zero, and the process is not alive.\n///\n/// Everything else reads **alive**: an absent or unparseable pid file, and the\n/// `0` a broker-hosted spawn records when its backend exposed no pid\n/// ([`crate::proc::is_process_alive`] already reads 0 as dead, so the explicit\n/// filter here is what keeps a pid-less backend from being declared dead by this\n/// resolver). That fail-toward-alive stance mirrors `liveness.rs`'s interim\n/// parity: this predicate exists to catch a *corpse*, never to guess at a\n/// backend it cannot see.\n///\n/// Recycled pids read alive, so a heal can be **missed** but never **mis-fired**\n/// — the failure direction is \"stays stale\", never \"tears down a live instance\".\n// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\npub fn shell_pid_provably_dead(shell_perch: &Path) -> bool {\n    let Some(pid) = read_shell_pid(shell_perch).filter(|&pid| pid != 0) else {\n        return false;\n    };\n    // BAROMETER W2 (releases#78): probe pid AND birth stamp, not the pid alone.\n    // A pid namespace resets at boot, so a corpse pid can be REUSED by an\n    // unrelated process started after the restart; under bare-pid liveness that\n    // reads ALIVE, the derived status reads online, and `relink` then refuses\n    // SHELL_ALREADY_ONLINE -- the one command that recovers the instance\n    // refusing on the very state that is wrong. The PAIR test (same pid,\n    // different start time) is what tells a reused pid from our own process.\n    //\n    // The stance is unchanged where there is no stamp to compare: an instance\n    // launched before this field existed, or a backend that exposed no start\n    // time, still falls back to plain absence and fails toward ALIVE.\n    // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n    let birth = read_shell_launch(shell_perch).and_then(|l| l.pid_started_at);\n    matches!(\n        crate::liveness::relay_liveness(Some(pid), birth),\n        crate::liveness::RelayLiveness::Gone\n    )\n}\n…\n#[cfg(test)]\nmod tests {\n    use super::*;\n\n    fn spawn(owlery: &Path, owner: &str, adapter: &str, alias: Option<&str>) -> String {\n        spawn_record(owlery, owner, adapter, alias).expect(\"spawn_record\")\n    }\n\n    /// A pid that is never a real allocation (above Linux `pid_max` ~4.2M and\n    /// Windows ranges; positive as i32) — deterministic, no pid-reuse flake.\n    /// Same constant `liveness.rs` uses for the agent-perch twin of this test.\n    const DEAD_PID: u32 = 2_000_000_000;\n\n    /// An `online` instance perch parking `pid` (or nothing at all).\n    fn online_perch(pid: Option<&str>) -> tempfile::TempDir {\n        let d = tempfile::tempdir().unwrap();\n        let mut info = ShellInfo::new(\"doyle\", \"alchemy\");\n        info.status = SHELL_STATUS_ONLINE.to_string();\n        write_shell_info(d.path(), &info).unwrap();\n        if let Some(p) = pid {\n            std::fs::write(d.path().join(SHELL_PID_FILE), p).unwrap();\n        }\n        d\n    }\n\n    fn status_of(d: &tempfile::TempDir) -> String {\n        let info = read_shell_info(d.path()).unwrap();\n        effective_status(d.path(), &info).to_string()\n    }\n\n    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE] the reused-pid row: a LIVE pid whose\n    // birth stamp does not match what the launch recorded reads GONE.\n    //\n    // THIS IS THE ROW THE SHIPPED PROBE CANNOT PASS, and it is the whole reason the\n    // stamp exists. Bare-pid liveness answers \"is something running under this\n    // number\", which after a reboot is a question about an unrelated process: the\n    // pid namespace reset, some other program took the number, the corpse reads\n    // ALIVE, the derived status reads online, and `relink` then refuses\n    // SHELL_ALREADY_ONLINE on the one instance that needs recovering.\n    //\n    // The fixture uses OUR OWN pid, which is genuinely alive, with a recorded birth\n    // that cannot be ours — so any implementation that consults liveness alone\n    // reports alive here and fails, while the pair test reports gone.\n    #[test]\n    fn a_live_pid_with_a_foreign_birth_stamp_reads_gone() {\n        let d = online_perch(Some(&std::process::id().to_string()));\n        // Sanity: without a stamp this instance reads ALIVE — i.e. the fixture is\n        // not accidentally proving the point through some other absence.\n        assert!(\n            !shell_pid_provably_dead(d.path()),\n            \"no stamp parked ⇒ the pre-existing fail-toward-alive stance holds\"\n        );\n\n        // Now record a launch whose start-time is not this process's.\n        let bogus = ShellLaunch {\n            pid_started_at: Some(1),\n            launched_ms: 1_000,\n        };\n        std::fs::write(\n            d.path().join(SHELL_LAUNCH_FILE),\n            serde_json::to_string(&bogus).unwrap(),\n        )\n        .unwrap();\n        assert!(\n            shell_pid_provably_dead(d.path()),\n            \"same pid, different process ⇒ our instance is gone, however alive that \\\n             pid looks\"\n        );\n        assert_eq!(\n            status_of(&d),\n            SHELL_STATUS_OFFLINE,\n            \"and the derived status follows, which is what unblocks relink\"\n        );\n    }\n\n    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE] the paired half: a live pid whose\n    // stamp DOES match is held, so the stamp cannot be satisfied by an\n    // implementation that simply calls every stamped instance dead.\n    #[test]\n    fn a_live_pid_with_its_own_birth_stamp_is_held() {\n        let d = online_perch(Some(&std::process::id().to_string()));\n        record_shell_launch(d.path(), std::process::id(), 1_000);\n        let parked = read_shell_launch(d.path()).expect(\"a launch stamp was parked\");\n        assert_eq!(parked.launched_ms, 1_000, \"the absolute stamp round-trips\");\n\n        // On a platform with no start-time oracle the stamp is None and the pair\n        // test cannot fire; the row still must not report a live process dead.\n        assert!(\n            !shell_pid_provably_dead(d.path()),\n            \"our own live process, stamped by its own launch, is not a corpse\"\n        );\n        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n    }\n\n    // [unit->REQ-HAZARD-SHELL-STALE-ONLINE] the whole discriminant matrix. The\n    // ONE case that derives offline is a parked, non-zero, dead pid — flynn's\n    // field shape: the binary was force-killed, no link broke, so `close_shell`\n    // never ran and the record still says `online`. Everything else is\n    // fail-toward-alive, so a backend this resolver cannot see is never declared\n    // dead: a live pid, an absent pid file, the `0` a broker-hosted spawn records\n    // when its backend exposed no pid, and an unparseable pid all stay online.\n    #[test]\n    fn online_derives_offline_only_for_a_provably_dead_pid() {\n        let dead = online_perch(Some(&DEAD_PID.to_string()));\n        assert!(shell_pid_provably_dead(dead.path()));\n        assert_eq!(\n            status_of(&dead),\n            SHELL_STATUS_OFFLINE,\n            \"a force-killed binary must not read online forever\"\n        );\n\n        let live = online_perch(Some(&std::process::id().to_string()));\n        assert!(!shell_pid_provably_dead(live.path()));\n        assert_eq!(status_of(&live), SHELL_STATUS_ONLINE, \"a live pid is online\");\n\n        // The fail-toward-alive arms — none of these is EVIDENCE of a corpse.\n        for (label, pid) in [\n            (\"absent pid file\", None),\n            (\"broker-hosted pid 0\", Some(\"0\")),\n            (\"unparseable pid\", Some(\"not-a-pid\")),\n            (\"empty pid file\", Some(\"\")),\n        ] {\n            let d = online_perch(pid);\n            assert!(\n                !shell_pid_provably_dead(d.path()),\n                \"{label} is not proof of death\"\n            );\n            assert_eq!(status_of(&d), SHELL_STATUS_ONLINE, \"{label} stays online\");\n        }\n    }\n\n    // [unit->REQ-HAZARD-SHELL-STALE-ONLINE] deriving only ever turns a false\n    // ONLINE into offline — it never invents an online. A recorded-offline\n    // instance stays offline whatever its pid file says (including a live pid,\n    // which a relaunch-then-crash sequence can leave behind), so `relink`'s gate\n    // and the wake arm can never be talked out of recovering one.\n    #[test]\n    fn derivation_never_promotes_offline_to_online() {\n        let d = tempfile::tempdir().unwrap();\n        write_shell_info(d.path(), &ShellInfo::new(\"doyle\", \"alchemy\")).unwrap();\n        std::fs::write(\n            d.path().join(SHELL_PID_FILE),\n            std::process::id().to_string(),\n        )\n        .unwrap();\n\n        let info = read_shell_info(d.path()).unwrap();\n        assert_eq!(info.status, SHELL_STATUS_OFFLINE, \"recorded offline\");\n        assert_eq!(\n            effective_status(d.path(), &info),\n            SHELL_STATUS_OFFLINE,\n            \"a live pid must not promote a recorded-offline instance to online\"\n        );\n        assert!(!is_shell_online(d.path(), &info));\n    }\n\n    // [unit->REQ-EP-5] minting: 0,1,2…; teardown frees the slot and the next\n    // spawn reuses it; offline instances still occupy theirs; a foreign\n    // adapter's instances never collide with this adapter's numbering.\n    #[test]\n    fn mint_smallest_free_and_teardown_frees() {\n        let tmp = tempfile::tempdir().unwrap();\n        let owlery = tmp.path();\n\n        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-0\");\n        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-1\");\n        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-2\");\n        // A different adapter numbers independently.\n        assert_eq!(spawn(owlery, \"doyle\", \"OsNotify\", None), \"OsNotify-0\");\n\n        // Teardown the middle instance — its slot is the smallest free.\n        teardown_shell(owlery, \"doyle\", \"GameRobot-1\").unwrap();\n        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-1\");\n        // All occupied again (every record is offline — offline occupies).\n        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-3\");\n        // Another owner's numbering is its own.\n        assert_eq!(spawn(owlery, \"ling\", \"GameRobot\", None), \"GameRobot-0\");\n    }\n\n    // [unit->REQ-HAZARD-ID-CHARSET] [unit->REQ-MANIFEST-2] a composite adapter\n    // option (`<adapter>:<profile>`) mints a **colon-free** `<parent>-<n>` id\n    // (`:` is a reserved address delimiter — it must never leak into the id /\n    // perch dir name), while the full composite rides in `adapter_name`. Two\n    // profiles of one adapter share the parent's ordinal space — instances are\n    // the adapter's resource, not the profile's.\n    #[test]\n    fn composite_option_mints_colon_free_id_and_carries_the_composite() {\n        let tmp = tempfile::tempdir().unwrap();\n        let owlery = tmp.path();\n\n        // Profiled spawn: id is parent-based + colon-free; carrier is the composite.\n        let id0 = spawn(owlery, \"doyle\", \"claude-spt:work\", None);\n        assert_eq!(id0, \"claude-spt-0\", \"id minted off the parent, no ':'\");\n        assert!(!id0.contains(':'), \"reserved delimiter never in the id\");\n        let info0 = resolve_shell_ref(owlery, \"doyle\", &id0).unwrap().1;\n        assert_eq!(info0.adapter_name, \"claude-spt:work\", \"composite carried verbatim\");\n\n        // A different profile of the SAME parent shares the ordinal space…\n        let id1 = spawn(owlery, \"doyle\", \"claude-spt:play\", None);\n        assert_eq!(id1, \"claude-spt-1\", \"profiles of one parent share <parent>-<n>\");\n        // …and a bare-parent spawn occupies the same space too.\n        let id2 = spawn(owlery, \"doyle\", \"claude-spt\", None);\n        assert_eq!(id2, \"claude-spt-2\");\n\n        // The id resolves back (it is a valid colon-free perch dir name).\n        assert!(resolve_shell_ref(owlery, \"doyle\", \"claude-spt-0\").is_some());\n    }\n\n    // [unit->REQ-EP-5] aliasing: set at spawn; owner-unique (duplicate\n    // refused, other owners unaffected); rename moves it; alias and canonical\n    // id resolve to the same instance; an alias shadowing a canonical id is\n    // refused; list never loses adapter_name behind the alias.\n    #[test]\n    fn alias_unique_rename_and_resolution() {\n        let tmp = tempfile::tempdir().unwrap();\n        let owlery = tmp.path();\n\n        let id = spawn(owlery, \"doyle\", \"GameRobot\", Some(\"TempleKeeper\"));\n        assert_eq!(id, \"GameRobot-0\");\n\n        // Both forms address the same instance.\n        let by_alias = resolve_shell_ref(owlery, \"doyle\", \"TempleKeeper\").unwrap();\n        let by_id = resolve_shell_ref(owlery, \"doyle\", \"GameRobot-0\").unwrap();\n        assert_eq!(by_alias.0, \"GameRobot-0\");\n        assert_eq!(by_alias, by_id);\n        // The alias never obscures what the shell is.\n        assert_eq!(by_alias.1.adapter_name, \"GameRobot\");\n\n        // Duplicate alias for the same owner refuses…\n        assert!(matches!(\n            spawn_record(owlery, \"doyle\", \"GameRobot\", Some(\"TempleKeeper\")),\n            Err(ShellError::AliasTaken(_))\n        ));\n        // …but another owner may hold the same label.\n        spawn_record(owlery, \"ling\", \"GameRobot\", Some(\"TempleKeeper\")).unwrap();\n\n        // An alias that shadows an existing canonical id refuses.\n        assert!(matches!(\n            spawn_record(owlery, \"doyle\", \"OsNotify\", Some(\"GameRobot-0\")),\n            Err(ShellError::AliasTaken(_))\n        ));\n\n        // Rename moves the alias; the old label stops resolving, the new one\n        // reaches the same instance; renaming onto a taken alias refuses;\n        // re-asserting an instance's own alias is idempotent.\n        let second = spawn(owlery, \"doyle\", \"GameRobot\", None);\n        assert!(matches!(\n            rename_shell(owlery, \"doyle\", &second, \"TempleKeeper\"),\n            Err(ShellError::AliasTaken(_))\n        ));\n        rename_shell(owlery, \"doyle\", \"TempleKeeper\", \"Keeper\").unwrap();\n        assert!(resolve_shell_ref(owlery, \"doyle\", \"TempleKeeper\").is_none());\n        assert_eq!(\n            resolve_shell_ref(owlery, \"doyle\", \"Keeper\").unwrap().0,\n            \"GameRobot-0\"\n        );\n        rename_shell(owlery, \"doyle\", \"Keeper\", \"Keeper\").unwrap();\n\n        // Unknown ref errs.\n        assert!(matches!(\n            rename_shell(owlery, \"doyle\", \"ghost\", \"X\"),\n            Err(ShellError::NotFound(_))\n        ));\n        assert!(matches!(\n            teardown_shell(owlery, \"doyle\", \"ghost\"),\n            Err(ShellError::NotFound(_))\n        ));\n    }\n\n    // [unit->REQ-SHELL-1] the record roundtrips with the full contracted\n    // field set and nothing else; a corrupt/foreign info.json is tolerated on\n    // list (skipped, never a panic) while still occupying its mint slot.\n    #[test]\n    fn shellinfo_roundtrip_and_corrupt_tolerance() {\n        let tmp = tempfile::tempdir().unwrap();\n        let owlery = tmp.path();\n\n        spawn(owlery, \"doyle\", \"GameRobot\", Some(\"TempleKeeper\"));\n        let p = perch::resolve_shell_perch_path_in(owlery, \"doyle\", \"GameRobot-0\");\n        let info = read_shell_info(&p).unwrap();\n        assert_eq!(info.r#type, SHELL_TYPE);\n        assert_eq!(info.owner, \"doyle\");\n        assert_eq!(info.adapter_name, \"GameRobot\");\n        assert_eq!(info.status, SHELL_STATUS_OFFLINE);\n        assert_eq!(info.alias.as_deref(), Some(\"TempleKeeper\"));\n        // The serialized shape is exactly the contracted field set.\n        let raw: serde_json::Value =\n            serde_json::from_str(&std::fs::read_to_string(perch::info_file_at(&p)).unwrap())\n                .unwrap();\n        let mut keys: Vec<_> = raw.as_object().unwrap().keys().cloned().collect();\n        keys.sort();\n        assert_eq!(keys, [\"adapter_name\", \"alias\", \"owner\", \"status\", \"type\"]);\n\n        // Corrupt a second instance's record: it drops from list (tolerant)…\n        spawn(owlery, \"doyle\", \"GameRobot\", None);\n        let p1 = perch::resolve_shell_perch_path_in(owlery, \"doyle\", \"GameRobot-1\");\n        std::fs::write(perch::info_file_at(&p1), \"{not json\").unwrap();\n        let listed = list_shells(owlery, \"doyle\");\n        assert_eq!(listed.len(), 1);\n        assert_eq!(listed[0].0, \"GameRobot-0\");\n        // …an agent-shaped info.json is not a shell record either…\n        std::fs::write(\n            perch::info_file_at(&p1),\n            r#\"{\"type\":\"LiveAgent\",\"owner\":\"x\",\"adapter_name\":\"y\",\"status\":\"online\"}\"#,\n        )\n        .unwrap();\n        assert!(read_shell_info(&p1).is_none());\n        // …but the dir still occupies its mint slot.\n        assert_eq!(spawn(owlery, \"doyle\", \"GameRobot\", None), \"GameRobot-2\");\n\n        // No shells dir at all → empty list, no panic.\n        assert!(list_shells(owlery, \"nobody\").is_empty());\n    }\n}","startLine":116,"lineNumbers":[116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,null,413,414,415,416,417,418,419,420,421,422,423,424,425,426,427,428,429,430,431,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,447,448,449,450,451,452,453,454,455,456,457,458,459,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499,500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517,518,519,520,521,522,523,524,525,526,527,528,529,530,531,532,533,534,535,536,537,538,539,540,541,542,543,544,545,546,547,548,549,550,551,552,553,554,555,556,557,558,559,560,561,562,563,564,565,566,567,568,569,570,571,572,573,574,575,576,577,578,579,580,581,582,583,584,585,586,587,588,589,590,591,592,593,594,595,596,597,598,599,600,601,602,603,604,605,606,607,608,609,610,611,612,613,614,615,616,617,618,619,620,621,622,623,624,625,626,627,628,629,630,631,632,633,634,635,636,637,638,639,640,641,642,643,644,645,646,647,648,649,650,651,652,653,654,655,656,657,658,659,660,661,662,663,664,665,666,667,668,669,670,671,672,673,674,675,676,677,678,679,680,681,682,683,684,685,686,687,688,689,690,691,692,693,694,695,696,697,698,699,700,701,702,703,704,705,706,707,708,709,710,711,712,713,714,715,716,717,718,719,720,721,722,723,724,725,726]},"fileSize":33627,"meta":{"source":{"type":"path","value":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\shellinfo.rs"}}},"isError":false,"timestamp":1789002209982}}
{"type":"message","id":"7d88c038","parentId":"4e4662a3","timestamp":"2026-09-10T01:03:29.985Z","message":{"role":"toolResult","toolCallId":"call_0ucLqFQjoUAJtPUK0oxfwNho|fc_0053347aa1a1a4a3016aa201e1de0487d199887513ddfc7c91","toolName":"grep","content":[{"type":"text","text":"# .worktrees/287-shellrestore/crates/spt-store/src/\n## atomic.rs#4C8C\n 57:// [impl->REQ-HAZARD-EBUSY-RENAME]\n*58:pub fn atomic_write_string(path: &Path, body: &str) -> io::Result<()> {\n 59:    atomic_write_bytes(path, body.as_bytes())\n 60:}\n 61:\n...\n 82:// [impl->REQ-HAZARD-EBUSY-RENAME]\n*83:pub fn atomic_write_bytes(path: &Path, body: &[u8]) -> io::Result<()> {\n 84:    write_then_rename(path, body, false)\n 85:}\n 86:\n...\n 107:// [impl->REQ-HAZARD-PERCH-RECORD-POWER-LOSS]\n*108:pub fn atomic_write_bytes_durable(path: &Path, body: &[u8]) -> io::Result<()> {\n 109:    write_then_rename(path, body, true)\n 110:}\n 111:\n...\n 113:// [impl->REQ-HAZARD-PERCH-RECORD-POWER-LOSS]\n*114:pub fn atomic_write_string_durable(path: &Path, body: &str) -> io::Result<()> {\n 115:    atomic_write_bytes_durable(path, body.as_bytes())\n 116:}\n 117:\n...\n 248:    #[test]\n*249:    fn atomic_write_creates_and_replaces() {\n 250:        let dir = tempfile::tempdir().unwrap();\n 251:        let target = dir.path().join(\"cursor\");\n 252:        atomic_write_string(&target, \"first\").unwrap();\n...\n 261:    #[test]\n*262:    fn atomic_write_bytes_round_trips() {\n 263:        let dir = tempfile::tempdir().unwrap();\n 264:        let target = dir.path().join(\"blob.bin\");\n 265:        let data: Vec<u8> = (0..=255u8).collect();\n...\n 276:    #[test]\n*277:    fn atomic_write_durable_round_trips_and_renames_tmp() {\n 278:        let dir = tempfile::tempdir().unwrap();\n 279:        let target = dir.path().join(\"rec.bin\");\n 280:        let data: Vec<u8> = (0..=255u8).collect();\n## shellinfo.rs#D341\n 109:/// Creates the perch dir.\n*110:pub fn write_shell_info(shell_perch: &Path, info: &ShellInfo) -> std::io::Result<()> {\n 111:    std::fs::create_dir_all(shell_perch)?;\n 112:    let s = serde_json::to_string_pretty(info).expect(\"ShellInfo serializes\");\n 113:    atomic_write_string(&perch::info_file_at(shell_perch), &s)"}],"details":{"scopePath":".worktrees/287-shellrestore/crates/spt-store/src","searchPath":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src","cwd":"C:\\Users\\decid\\Documents\\projects\\spt-core","matchCount":8,"fileCount":2,"files":[".worktrees/287-shellrestore/crates/spt-store/src/atomic.rs",".worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs"],"fileMatches":[{"path":".worktrees/287-shellrestore/crates/spt-store/src/atomic.rs","count":7},{"path":".worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs","count":1}],"truncated":false,"displayContent":"# .worktrees/287-shellrestore/crates/spt-store/src/\n## atomic.rs#4C8C\n  57│// [impl->REQ-HAZARD-EBUSY-RENAME]\n *58│pub fn atomic_write_string(path: &Path, body: &str) -> io::Result<()> {\n  59│    atomic_write_bytes(path, body.as_bytes())\n  60│}\n  61│\n    │...\n  82│// [impl->REQ-HAZARD-EBUSY-RENAME]\n *83│pub fn atomic_write_bytes(path: &Path, body: &[u8]) -> io::Result<()> {\n  84│    write_then_rename(path, body, false)\n  85│}\n  86│\n    │...\n 107│// [impl->REQ-HAZARD-PERCH-RECORD-POWER-LOSS]\n*108│pub fn atomic_write_bytes_durable(path: &Path, body: &[u8]) -> io::Result<()> {\n 109│    write_then_rename(path, body, true)\n 110│}\n 111│\n    │...\n 113│// [impl->REQ-HAZARD-PERCH-RECORD-POWER-LOSS]\n*114│pub fn atomic_write_string_durable(path: &Path, body: &str) -> io::Result<()> {\n 115│    atomic_write_bytes_durable(path, body.as_bytes())\n 116│}\n 117│\n    │...\n 248│    #[test]\n*249│    fn atomic_write_creates_and_replaces() {\n 250│        let dir = tempfile::tempdir().unwrap();\n 251│        let target = dir.path().join(\"cursor\");\n 252│        atomic_write_string(&target, \"first\").unwrap();\n    │...\n 261│    #[test]\n*262│    fn atomic_write_bytes_round_trips() {\n 263│        let dir = tempfile::tempdir().unwrap();\n 264│        let target = dir.path().join(\"blob.bin\");\n 265│        let data: Vec<u8> = (0..=255u8).collect();\n    │...\n 276│    #[test]\n*277│    fn atomic_write_durable_round_trips_and_renames_tmp() {\n 278│        let dir = tempfile::tempdir().unwrap();\n 279│        let target = dir.path().join(\"rec.bin\");\n 280│        let data: Vec<u8> = (0..=255u8).collect();\n## shellinfo.rs#D341\n 109│/// Creates the perch dir.\n*110│pub fn write_shell_info(shell_perch: &Path, info: &ShellInfo) -> std::io::Result<()> {\n 111│    std::fs::create_dir_all(shell_perch)?;\n 112│    let s = serde_json::to_string_pretty(info).expect(\"ShellInfo serializes\");\n 113│    atomic_write_string(&perch::info_file_at(shell_perch), &s)"},"isError":false,"timestamp":1789002209985}}
{"type":"message","id":"adf41441","parentId":"7d88c038","timestamp":"2026-09-10T01:03:30.939Z","message":{"role":"toolResult","toolCallId":"call_piKRwXDg8gKodC6EfbxRpl2G|fc_0053347aa1a1a4a3016aa201e1ddfc87d18ac56d5135aec9c1","toolName":"grep","content":[{"type":"text","text":"# .worktrees/287-shellrestore/\n## traceable-reqs.toml#D6D2\n 4179:id = \"REQ-SHELL-KILL-AUTHENTICATED\"\n*4180:title = \"A RECORDED PID IS NOT KILL AUTHORITY ON THE PRODUCT PATH EITHER: no shell-lifecycle kill fires until the pid+birth PAIR proves the process at that pid is still the one we launched. BAROMETER W2 authenticated the DERIVATION path (`shellinfo::shell_pid_provably_dead` runs the pair test) and left the KILL path believing a bare pid, so the same recycled-pid state that the derived read correctly calls a corpse still routes to `taskkill /PID <pid> /T /F` (unix `kill -9`) against whatever unrelated pro...\n 4181:required_stages = [\"doc\", \"impl\", \"unit\", \"int\"]  # ACTIVATED BAROMETER W2 reopen in the commit landing the evidence. doc = the KNOWN-HAZARDS 7.58 amend this fix carries (doyle's rider: the entry was scoped TEST-only and that scoping went false the moment the product defect existed, so the de-scope is a mint-time answer, not an assembly-time one). MINTED BAROMETER W2 reopen (todlando, 2026-08-02), releases#114 -- inactive-first per doyle's build order. Kin REQ-HAZARD-TEST-PID-TREE-KILL-IDENTITY (the same...\n 4182:\n 4183:[[requirements]]\n\n## crates/\n\n### spt-daemon/\n\n#### src/\n##### linkhost.rs#7DFC\n 578:    }\n*579:    let pid = shellinfo::read_shell_pid(perch).filter(|&p| p != 0);\n*580:    let birth = shellinfo::read_shell_launch(perch).and_then(|l| l.pid_started_at);\n 581:    let outcome = shellhost::close_shell(owlery, owner, id, Some(shell))\n 582:        .map_err(|e| ShellLinkError::Failed(format!(\"force stop: {e}\")))?;\n 583:    // The ephemeral test above reads the SAME resolved manifest the close acts\n...\n 1169:        std::fs::write(p.join(shellhost::SHELL_PID_FILE), pid.to_string()).unwrap();\n*1170:        shellinfo::record_shell_launch(&p, pid, 1_000);\n 1171:        std::fs::write(p.join(shellhost::LINK_TOKEN_FILE), token).unwrap();\n 1172:        p\n 1173:    }\n...\n 1565:            std::fs::write(perch_path.join(shellhost::SHELL_PID_FILE), live.to_string()).unwrap();\n*1566:            shellinfo::record_shell_launch(&perch_path, live, 1_000);\n 1567:            match prepare_drive(&owlery, \"doyle\", \"Stick\", \"stick\", \"x=0.7,y=-0.2\").unwrap() {\n 1568:                DrivePrep::Deliver { id: d, token, frame } => {\n 1569:                    assert_eq!(d, id);\n##### shelldisc.rs#D7FC\n 348:            // depending on a stamp being absent.\n*349:            shellinfo::record_shell_launch(&perch, pid, 1_000);\n 350:        }\n 351:\n 352:        let d = discover(&owlery, \"dead\", &registered);\n##### shellhost.rs#D273\n 52:/// written here (launch/close) and MATCHED there\n*53:/// ([`shellinfo::shell_pid_provably_dead`]), so both sides must be one const.\n 54:// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n 55:pub use spt_store::shellinfo::SHELL_PID_FILE;\n 56:\n...\n 320:pub fn live_launch_winner(shell_perch: &Path) -> Option<u32> {\n*321:    shellinfo::read_shell_pid(shell_perch)\n*322:        .filter(|&p| p != 0 && !shellinfo::shell_pid_provably_dead(shell_perch))\n 323:}\n 324:\n 325:/// THE route-selection seam. Generic over the daemon call and the in-process\n...\n 504:            // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n*505:            spt_store::shellinfo::record_shell_launch(&perch, pid, now_ms());\n 506:            Ok(pid)\n 507:        }\n 508:    }\n...\n 560:    // Same stamp at the broker-hosted launch. A backend that exposed no pid\n*561:    // records 0 here; record_shell_launch stamps no start-time for it, so the\n 562:    // probe keeps its fail-toward-alive stance for pid-less backends.\n 563:    // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n*564:    spt_store::shellinfo::record_shell_launch(&perch, pid, now_ms());\n 565:    Ok(pid)\n 566:}\n 567:\n...\n 687:/// The pair test is [`spt_store::liveness::relay_liveness`], the same predicate\n*688:/// [`shellinfo::shell_pid_provably_dead`] runs on the derivation side. W2\n 689:/// authenticated that side and left this one believing a bare pid, so the very\n 690:/// state the derived read calls a corpse still routed a recycled number to\n 691:/// `taskkill /T` — a stranger's whole subtree (KNOWN-HAZARDS 7.58).\n...\n 707:pub fn kill_shell_at(shell_perch: &Path) {\n*708:    let Some(pid) = shellinfo::read_shell_pid(shell_perch).filter(|&p| p != 0) else {\n 709:        return;\n 710:    };\n*711:    let birth = shellinfo::read_shell_launch(shell_perch).and_then(|l| l.pid_started_at);\n 712:    match kill_verdict(spt_store::liveness::relay_liveness(Some(pid), birth)) {\n 713:        // Still ours (or a pre-stamp record, which existence is all it can offer).\n 714:        KillVerdict::Fire => kill_shell_pid(pid),\n...\n 1226:        );\n*1227:        shellinfo::record_shell_launch(perch, me, 1_000);\n 1228:        assert_eq!(live_launch_winner(perch), Some(me), \"same birth retains custody\");\n*1229:        let mut launch = shellinfo::read_shell_launch(perch).unwrap();\n 1230:        launch.pid_started_at = Some(\n 1231:            launch.pid_started_at.expect(\"native birth stamp on supported platforms\") ^ 1,\n 1232:        );\n...\n 1792:        std::fs::write(perch.join(SHELL_PID_FILE), ours.id().to_string()).unwrap();\n*1793:        shellinfo::record_shell_launch(perch, ours.id(), 1);\n 1794:\n 1795:        kill_shell_at(perch);\n 1796:\n##### shellwake.rs#D2E1\n 172:/// Read that record back — **the** parse, so the two-line format has exactly one\n*173:/// reader shape (the `record_shell_launch`/`read_shell_launch` pattern).\n 174:///\n 175:/// `None` means \"no usable pid on record\": absent, empty, or unparseable. Every\n 176:/// caller must treat that as FAIL-TOWARD-ALIVE — refuse the kill and leave the\n...\n 670:    }\n*671:    if persistent || !shellinfo::shell_pid_provably_dead(perch) {\n 672:        return true; // persistence overrides the freeze; clean closes need no age\n 673:    }\n*674:    let (Some(boot_ms), Some(launch)) = (boot_ms, shellinfo::read_shell_launch(perch)) else {\n 675:        return false;\n 676:    };\n 677:    launch_predates_boot(launch.launched_ms, boot_ms, BOOT_RESTORE_SLACK_MS)\n...\n 1106:            .unwrap();\n*1107:            shellinfo::record_shell_launch(&live_perch, std::process::id(), 1_000);\n 1108:\n 1109:            let mtime = |p: &std::path::Path| {\n 1110:                std::fs::metadata(spt_store::perch::info_file_at(p))\n...\n 1213:        if let Some(launched_ms) = launched_ms {\n*1214:            shellinfo::record_shell_launch(&perch, 2_000_000_000, launched_ms);\n 1215:        }\n 1216:        id\n 1217:    }\n...\n 1249:        .unwrap();\n*1250:        shellinfo::record_shell_launch(&binding_perch, std::process::id(), boot + 120_000);\n 1251:\n 1252:        let mut restored = restore_persistent_shells_at_boot(owlery, &registered, &adapters_dir);\n 1253:        restored.sort();\n...\n 1260:        assert_eq!(restored, expected);\n*1261:        assert_eq!(shellinfo::read_shell_pid(&binding_perch), Some(std::process::id()));\n 1262:    }\n 1263:\n 1264:    // [unit->REQ-SHELL-OWNER-ONLINE-RESTORE]\n...\n 1533:        std::fs::write(perch.join(shellinfo::SHELL_PID_FILE), pid.to_string()).unwrap();\n*1534:        shellinfo::record_shell_launch(&perch, pid, 1_000);\n*1535:        let mut launch = shellinfo::read_shell_launch(&perch).unwrap();\n 1536:        launch.pid_started_at = Some(\n 1537:            launch.pid_started_at.expect(\"native birth on supported platforms\") ^ 1,\n 1538:        );\n...\n 1801:            std::fs::write(perch.join(shellinfo::SHELL_PID_FILE), DEAD_PID.to_string()).unwrap();\n*1802:            let launch = shellinfo::ShellLaunch {\n 1803:                pid_started_at: Some(1),\n 1804:                launched_ms,\n 1805:            };\n\n#### tests/\n##### shell_kill_auth.rs#CC9B\n 60:    .unwrap();\n*61:    let bogus = spt_store::shellinfo::ShellLaunch {\n 62:        pid_started_at: Some(1),\n 63:        launched_ms: 1_000,\n 64:    };\n...\n 74:    assert!(\n*75:        spt_store::shellinfo::shell_pid_provably_dead(perch),\n 76:        \"control: the PAIR test reads a mismatched stamp as a corpse\"\n 77:    );\n 78:\n\n### spt/\n\n#### src/\n##### cli.rs#8B9D\n 32681:        .unwrap();\n*32682:        spt_store::shellinfo::record_shell_launch(&shell_perch, live, 1_000);\n 32683:        assert_eq!(relink(\"Scout\", \"doyle\"), 1, \"already online\");\n 32684:    }\n 32685:\n\n#### tests/\n##### activity_link_push_e2e.rs#FDAD\n 304:        .unwrap();\n*305:        spt_store::shellinfo::record_shell_launch(&shell_perch, keeper_pid, now_ms());\n 306:        let link_instant = now_ms();\n 307:        let (link_frame, _) = wait_for_state(&token_a, \"busy\", Duration::from_secs(10));\n 308:        let link_since: u64 = link_frame.attr(\"since\").unwrap().parse().unwrap();\n##### attach_link_push_e2e.rs#588B\n 352:        .unwrap();\n*353:        spt_store::shellinfo::record_shell_launch(&shell_perch, keeper_pid, now_ms());\n 354:\n 355:        // ── CLAUSE 1: current attachment at link time, with nothing to wait for.\n 356:        let first = wait_for_attach(\n...\n 500:        .unwrap();\n*501:        spt_store::shellinfo::record_shell_launch(&shell_perch, keeper.id(), now_ms());\n 502:\n 503:        let re = wait_for_attach(\n 504:            &token_b,\n##### drive_e2e.rs#AACF\n 187:    std::fs::write(shell_perch.join(\"shell.pid\"), stand_in.id().to_string()).unwrap();\n*188:    spt_store::shellinfo::record_shell_launch(&shell_perch, stand_in.id(), 1_000);\n 189:    let token_a = token_of();\n 190:\n 191:    // ── (1) DROP-AT-WRITE: driving an offline shell drops (exit 0, diagnostic),\n##### gateway_owner_shell_e2e.rs#C41A\n 231:    std::fs::write(shell_perch.join(\"shell.pid\"), stand_in.id().to_string()).unwrap();\n*232:    spt_store::shellinfo::record_shell_launch(&shell_perch, stand_in.id(), 1_000);\n 233:    online_by_token(&token_a);\n 234:\n 235:    // ── cmd (durable): a gateway-owned command vocab-checks + spools to the\n\n### spt-store/src/\n#### shellinfo.rs#D341\n 121:/// The recorded launch pid, if the perch parks a parseable one.\n*122:pub fn read_shell_pid(shell_perch: &Path) -> Option<u32> {\n 123:    std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n 124:        .ok()?\n 125:        .trim()\n...\n 151:#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]\n*152:pub struct ShellLaunch {\n 153:    /// The native start-time of the launched pid, when the platform offers one.\n 154:    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n 155:    pub pid_started_at: Option<u64>,\n...\n 164:// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n*165:pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) {\n*166:    let launch = ShellLaunch {\n 167:        pid_started_at: crate::proc::process_started_at(pid),\n 168:        launched_ms: now_ms,\n 169:    };\n...\n 177:/// compare\" rather than as a fault.\n*178:pub fn read_shell_launch(shell_perch: &Path) -> Option<ShellLaunch> {\n 179:    let raw = std::fs::read_to_string(shell_perch.join(SHELL_LAUNCH_FILE)).ok()?;\n 180:    serde_json::from_str(&raw).ok()\n 181:}\n...\n 197:// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n*198:pub fn shell_pid_provably_dead(shell_perch: &Path) -> bool {\n*199:    let Some(pid) = read_shell_pid(shell_perch).filter(|&pid| pid != 0) else {\n 200:        return false;\n 201:    };\n 202:    // BAROMETER W2 (releases#78): probe pid AND birth stamp, not the pid alone.\n...\n 213:    // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n*214:    let birth = read_shell_launch(shell_perch).and_then(|l| l.pid_started_at);\n 215:    matches!(\n 216:        crate::liveness::relay_liveness(Some(pid), birth),\n 217:        crate::liveness::RelayLiveness::Gone\n...\n 237:pub fn effective_status<'a>(shell_perch: &Path, info: &'a ShellInfo) -> &'a str {\n*238:    if info.status == SHELL_STATUS_ONLINE && shell_pid_provably_dead(shell_perch) {\n 239:        return SHELL_STATUS_OFFLINE;\n 240:    }\n 241:    &info.status\n...\n 461:        assert!(\n*462:            !shell_pid_provably_dead(d.path()),\n 463:            \"no stamp parked ⇒ the pre-existing fail-toward-alive stance holds\"\n 464:        );\n 465:\n 466:        // Now record a launch whose start-time is not this process's.\n*467:        let bogus = ShellLaunch {\n 468:            pid_started_at: Some(1),\n 469:            launched_ms: 1_000,\n 470:        };\n...\n 476:        assert!(\n*477:            shell_pid_provably_dead(d.path()),\n 478:            \"same pid, different process ⇒ our instance is gone, however alive that \\\n 479:             pid looks\"\n 480:        );\n...\n 493:        let d = online_perch(Some(&std::process::id().to_string()));\n*494:        record_shell_launch(d.path(), std::process::id(), 1_000);\n*495:        let parked = read_shell_launch(d.path()).expect(\"a launch stamp was parked\");\n 496:        assert_eq!(parked.launched_ms, 1_000, \"the absolute stamp round-trips\");\n 497:\n 498:        // On a platform with no start-time oracle the stamp is None and the pair\n...\n 500:        assert!(\n*501:            !shell_pid_provably_dead(d.path()),\n 502:            \"our own live process, stamped by its own launch, is not a corpse\"\n 503:        );\n 504:        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n...\n 516:        let dead = online_perch(Some(&DEAD_PID.to_string()));\n*517:        assert!(shell_pid_provably_dead(dead.path()));\n 518:        assert_eq!(\n 519:            status_of(&dead),\n 520:            SHELL_STATUS_OFFLINE,\n...\n 524:        let live = online_perch(Some(&std::process::id().to_string()));\n*525:        assert!(!shell_pid_provably_dead(live.path()));\n 526:        assert_eq!(status_of(&live), SHELL_STATUS_ONLINE, \"a live pid is online\");\n 527:\n 528:        // The fail-toward-alive arms — none of these is EVIDENCE of a corpse.\n...\n 536:            assert!(\n*537:                !shell_pid_provably_dead(d.path()),\n 538:                \"{label} is not proof of death\"\n 539:            );\n 540:            assert_eq!(status_of(&d), SHELL_STATUS_ONLINE, \"{label} stays online\");\n\n## docs/\n### KNOWN-HAZARDS.md#11D3\n 80:- **Watcher eligibility:** recorded `offline`, no live binary awaiting bind, and either `persistent`, no corpse, or a corpse whose launch predates the machine boot instant. A nonpersistent corpse without a launch stamp or boot oracle remains frozen; persistent instances require neither to become eligible. Birth-safe probes prevent a recycled pid from masquerading as a live shell.\n*81:- **spt-core mapping:** `spt_store::shellinfo::{shell_pid_provably_dead, effective_status, is_shell_online}` (the resolver — the shell-side twin of 2.5's `liveness.rs`, which gave *agent* perches exactly this and which shells never got); consumers in `linkhost::{relink_shell, prepare_drive, run_action}`, `shelldisc::discover`, `activity::observe_links`; the class-(c) eligibility read is `spt_daemon::shellwake::watcher_eligible` (+ `launch_predates_boot`, `BOOT_RESTORE_SLACK_MS`), and the birth stamp it...\n 82:- **Source:** spt-core, flynn's spt-alchemy field report (2026-07-25) — a deterministic recipe, not a race. Class-(c) re-based BAROMETER W2 (releases#78, doyle's ruling on comment 5156810267).\n 83:\n 84:### 2.7 A daemon or machine restart strands `persistent` shells — and a graceful cascade fixture suppresses the failing arm `[REQ-HAZARD-RESTART-STRANDS-PERSISTENT-SHELLS]`\n...\n 90:- **Per-owner enumeration:** the existing `SHELL_RECORD_HEALED:<owner>/<shell_id>` daemon diagnostic names **every** successfully healed instance, not one representative. Healthy and already-healed records produce no event. The restore diagnostics likewise identify each attempted instance and distinguish boot from owner-online triggers. <!-- [doc->REQ-SHELL-HEAL-ENUMERATION] -->\n*91:- **spt-core mapping:** `spt_daemon::shellwake::{heal_stale_online_records, restore_persistent_shells_at_boot, restore_persistent_shells_on_owner_online, OwnerOnlineEdge}`; `shellhost::live_launch_winner`; `spt_store::shellinfo::{ShellLaunch, shell_pid_provably_dead}`. `launch_predates_boot` and `BOOT_RESTORE_SLACK_MS` now govern only nonpersistent watcher eligibility.\n 92:- **Source:** BAROMETER W2 (releases#78); releases#287 operator ruling (2026-09-08), superseding the persistent force-kill freeze and boot-instant conjunct.\n 93:<!-- [doc->REQ-HAZARD-RESTART-STRANDS-PERSISTENT-SHELLS] -->\n 94:\n...\n 911:<!-- [doc->REQ-SHELL-KILL-AUTHENTICATED] -->\n*912:- **PRODUCT POPULATION (BAROMETER, releases#114 — this entry was scoped TEST-only until then, and that scoping was false the moment the product defect was proven).** The shipped shell lifecycle carried the identical violation. BAROMETER W2 authenticated the DERIVATION path (`shellinfo::shell_pid_provably_dead` runs the pair test) and left the KILL path believing a bare pid, so the very state the derived read calls a corpse still routed to `taskkill /PID <pid> /T /F`. Proven by probe, not inferred: a li...\n 913:- **A read-side gate is worthless where nothing was written to read.** `waker.pid` was parked bare, and `relay_liveness(live_pid, None)` is `Held` by design (pre-stamp records fail toward alive) — so a gate at `kill_waker_at` alone would have returned `Held` for every record that exists today and every one written tomorrow: a **vacuous** gate that proves green. Authenticating a kill therefore begins at the WRITE site. The pair is minted in the waker's single existing write as a two-line `waker.pid` (`<...\n 914:- **The pair test NARROWS the mis-fire; on Linux it does NOT eliminate it.** `process_started_at` reads `/proc/<pid>/stat` field 22, which counts `CLK_TCK = 100` jiffies, so two processes whose starts fall in the same 10ms tick carry an identical stamp and the pair cannot separate them. The window closes from *any recycled pid* to *a pid recycled into the same 10ms tick as the recorded start* — which requires our process to die AND the OS to hand its number to a new process inside one tick. Windows is ...\n 915:- **Migration window and downgrade direction, named rather than discovered.** Pre-W2 shell records and pre-fix waker records carry no stamp, read `Held` on existence alone, and keep the old bare-pid kill until their next launch writes a pair — the window is accepted, not closed. In the other direction, an OLD binary reading a NEW two-line `waker.pid` parse-fails to `None`, which reads as no-pid and refuses the kill: missed-kill, never mis-fire.\n...\n 1018:| 2.4 | gen_start = now() on cold-start + handoff | per-instance generation |\n*1019:| 2.6 | A shell's ONLINE-ness is DERIVED from recorded status and a not-provably-dead PID/birth pair. Abrupt death and daemon-stop leave stale `online` records; derive truth at gates/renders and heal each changed record once. The same-boot no-spontaneous-relaunch rule applies only to nonpersistent shells. Persistent instances follow 2.7 regardless of launch age. During new-launch publication, retire the previous birth before publishing the new PID; an unstable read is not proof of death | `spt_store::she...\n 1020:<!-- [doc->REQ-HAZARD-SHELL-STALE-ONLINE] -->\n 1021:| 2.7 | A once-per-generation boot sweep and each owner offline->online edge restore every instance whose adapter is `persistent`, owner is online, and binary is down in fact. Machine boot time, launch age, and absent launch stamps do not block persistent restoration; already-online and live binding launches are excluded. Heal every stale instance per owner with no repeat writes. Prove the restart shape without first suspending the fixture; a clean derived display alone is not evidence the record was hea...\n 1022:| 3.1 | Ephemeral perch cleanup on all exit paths | `ring` (RAII guard) |\n\n[Some lines truncated to 512 chars]"}],"details":{"scopePath":".worktrees/287-shellrestore","searchPath":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore","cwd":"C:\\Users\\decid\\Documents\\projects\\spt-core","matchCount":58,"fileCount":13,"files":[".worktrees/287-shellrestore/crates/spt-daemon/src/linkhost.rs",".worktrees/287-shellrestore/crates/spt-daemon/src/shelldisc.rs",".worktrees/287-shellrestore/crates/spt-daemon/src/shellhost.rs",".worktrees/287-shellrestore/crates/spt-daemon/src/shellwake.rs",".worktrees/287-shellrestore/crates/spt-daemon/tests/shell_kill_auth.rs",".worktrees/287-shellrestore/crates/spt/src/cli.rs",".worktrees/287-shellrestore/crates/spt/tests/activity_link_push_e2e.rs",".worktrees/287-shellrestore/crates/spt/tests/attach_link_push_e2e.rs",".worktrees/287-shellrestore/crates/spt/tests/drive_e2e.rs",".worktrees/287-shellrestore/crates/spt/tests/gateway_owner_shell_e2e.rs",".worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs",".worktrees/287-shellrestore/docs/KNOWN-HAZARDS.md",".worktrees/287-shellrestore/traceable-reqs.toml"],"fileMatches":[{"path":".worktrees/287-shellrestore/crates/spt-daemon/src/linkhost.rs","count":4},{"path":".worktrees/287-shellrestore/crates/spt-daemon/src/shelldisc.rs","count":1},{"path":".worktrees/287-shellrestore/crates/spt-daemon/src/shellhost.rs","count":12},{"path":".worktrees/287-shellrestore/crates/spt-daemon/src/shellwake.rs","count":10},{"path":".worktrees/287-shellrestore/crates/spt-daemon/tests/shell_kill_auth.rs","count":2},{"path":".worktrees/287-shellrestore/crates/spt/src/cli.rs","count":1},{"path":".worktrees/287-shellrestore/crates/spt/tests/activity_link_push_e2e.rs","count":1},{"path":".worktrees/287-shellrestore/crates/spt/tests/attach_link_push_e2e.rs","count":2},{"path":".worktrees/287-shellrestore/crates/spt/tests/drive_e2e.rs","count":1},{"path":".worktrees/287-shellrestore/crates/spt/tests/gateway_owner_shell_e2e.rs","count":1},{"path":".worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs","count":18},{"path":".worktrees/287-shellrestore/docs/KNOWN-HAZARDS.md","count":4},{"path":".worktrees/287-shellrestore/traceable-reqs.toml","count":1}],"truncated":true,"displayContent":"# .worktrees/287-shellrestore/\n## traceable-reqs.toml#D6D2\n 4179│id = \"REQ-SHELL-KILL-AUTHENTICATED\"\n*4180│title = \"A RECORDED PID IS NOT KILL AUTHORITY ON THE PRODUCT PATH EITHER: no shell-lifecycle kill fires until the pid+birth PAIR proves the process at that pid is still the one we launched. BAROMETER W2 authenticated the DERIVATION path (`shellinfo::shell_pid_provably_dead` runs the pair test) and left the KILL path believing a bare pid, so the same recycled-pid state that the derived read correctly calls a corpse still routes to `taskkill /PID <pid> /T /F` (unix `kill -9`) against whatever unrelated pro...\n 4181│required_stages = [\"doc\", \"impl\", \"unit\", \"int\"]  # ACTIVATED BAROMETER W2 reopen in the commit landing the evidence. doc = the KNOWN-HAZARDS 7.58 amend this fix carries (doyle's rider: the entry was scoped TEST-only and that scoping went false the moment the product defect existed, so the de-scope is a mint-time answer, not an assembly-time one). MINTED BAROMETER W2 reopen (todlando, 2026-08-02), releases#114 -- inactive-first per doyle's build order. Kin REQ-HAZARD-TEST-PID-TREE-KILL-IDENTITY (the same...\n 4182│\n 4183│[[requirements]]\n\n## crates/\n\n### spt-daemon/\n\n#### src/\n##### linkhost.rs#7DFC\n  578│    }\n *579│    let pid = shellinfo::read_shell_pid(perch).filter(|&p| p != 0);\n *580│    let birth = shellinfo::read_shell_launch(perch).and_then(|l| l.pid_started_at);\n  581│    let outcome = shellhost::close_shell(owlery, owner, id, Some(shell))\n  582│        .map_err(|e| ShellLinkError::Failed(format!(\"force stop: {e}\")))?;\n  583│    // The ephemeral test above reads the SAME resolved manifest the close acts\n     │...\n 1169│        std::fs::write(p.join(shellhost::SHELL_PID_FILE), pid.to_string()).unwrap();\n*1170│        shellinfo::record_shell_launch(&p, pid, 1_000);\n 1171│        std::fs::write(p.join(shellhost::LINK_TOKEN_FILE), token).unwrap();\n 1172│        p\n 1173│    }\n     │...\n 1565│            std::fs::write(perch_path.join(shellhost::SHELL_PID_FILE), live.to_string()).unwrap();\n*1566│            shellinfo::record_shell_launch(&perch_path, live, 1_000);\n 1567│            match prepare_drive(&owlery, \"doyle\", \"Stick\", \"stick\", \"x=0.7,y=-0.2\").unwrap() {\n 1568│                DrivePrep::Deliver { id: d, token, frame } => {\n 1569│                    assert_eq!(d, id);\n##### shelldisc.rs#D7FC\n 348│            // depending on a stamp being absent.\n*349│            shellinfo::record_shell_launch(&perch, pid, 1_000);\n 350│        }\n 351│\n 352│        let d = discover(&owlery, \"dead\", &registered);\n##### shellhost.rs#D273\n   52│/// written here (launch/close) and MATCHED there\n  *53│/// ([`shellinfo::shell_pid_provably_dead`]), so both sides must be one const.\n   54│// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n   55│pub use spt_store::shellinfo::SHELL_PID_FILE;\n   56│\n     │...\n  320│pub fn live_launch_winner(shell_perch: &Path) -> Option<u32> {\n *321│    shellinfo::read_shell_pid(shell_perch)\n *322│        .filter(|&p| p != 0 && !shellinfo::shell_pid_provably_dead(shell_perch))\n  323│}\n  324│\n  325│/// THE route-selection seam. Generic over the daemon call and the in-process\n     │...\n  504│            // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n *505│            spt_store::shellinfo::record_shell_launch(&perch, pid, now_ms());\n  506│            Ok(pid)\n  507│        }\n  508│    }\n     │...\n  560│    // Same stamp at the broker-hosted launch. A backend that exposed no pid\n *561│    // records 0 here; record_shell_launch stamps no start-time for it, so the\n  562│    // probe keeps its fail-toward-alive stance for pid-less backends.\n  563│    // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n *564│    spt_store::shellinfo::record_shell_launch(&perch, pid, now_ms());\n  565│    Ok(pid)\n  566│}\n  567│\n     │...\n  687│/// The pair test is [`spt_store::liveness::relay_liveness`], the same predicate\n *688│/// [`shellinfo::shell_pid_provably_dead`] runs on the derivation side. W2\n  689│/// authenticated that side and left this one believing a bare pid, so the very\n  690│/// state the derived read calls a corpse still routed a recycled number to\n  691│/// `taskkill /T` — a stranger's whole subtree (KNOWN-HAZARDS 7.58).\n     │...\n  707│pub fn kill_shell_at(shell_perch: &Path) {\n *708│    let Some(pid) = shellinfo::read_shell_pid(shell_perch).filter(|&p| p != 0) else {\n  709│        return;\n  710│    };\n *711│    let birth = shellinfo::read_shell_launch(shell_perch).and_then(|l| l.pid_started_at);\n  712│    match kill_verdict(spt_store::liveness::relay_liveness(Some(pid), birth)) {\n  713│        // Still ours (or a pre-stamp record, which existence is all it can offer).\n  714│        KillVerdict::Fire => kill_shell_pid(pid),\n     │...\n 1226│        );\n*1227│        shellinfo::record_shell_launch(perch, me, 1_000);\n 1228│        assert_eq!(live_launch_winner(perch), Some(me), \"same birth retains custody\");\n*1229│        let mut launch = shellinfo::read_shell_launch(perch).unwrap();\n 1230│        launch.pid_started_at = Some(\n 1231│            launch.pid_started_at.expect(\"native birth stamp on supported platforms\") ^ 1,\n 1232│        );\n     │...\n 1792│        std::fs::write(perch.join(SHELL_PID_FILE), ours.id().to_string()).unwrap();\n*1793│        shellinfo::record_shell_launch(perch, ours.id(), 1);\n 1794│\n 1795│        kill_shell_at(perch);\n 1796│\n##### shellwake.rs#D2E1\n  172│/// Read that record back — **the** parse, so the two-line format has exactly one\n *173│/// reader shape (the `record_shell_launch`/`read_shell_launch` pattern).\n  174│///\n  175│/// `None` means \"no usable pid on record\": absent, empty, or unparseable. Every\n  176│/// caller must treat that as FAIL-TOWARD-ALIVE — refuse the kill and leave the\n     │...\n  670│    }\n *671│    if persistent || !shellinfo::shell_pid_provably_dead(perch) {\n  672│        return true; // persistence overrides the freeze; clean closes need no age\n  673│    }\n *674│    let (Some(boot_ms), Some(launch)) = (boot_ms, shellinfo::read_shell_launch(perch)) else {\n  675│        return false;\n  676│    };\n  677│    launch_predates_boot(launch.launched_ms, boot_ms, BOOT_RESTORE_SLACK_MS)\n     │...\n 1106│            .unwrap();\n*1107│            shellinfo::record_shell_launch(&live_perch, std::process::id(), 1_000);\n 1108│\n 1109│            let mtime = |p: &std::path::Path| {\n 1110│                std::fs::metadata(spt_store::perch::info_file_at(p))\n     │...\n 1213│        if let Some(launched_ms) = launched_ms {\n*1214│            shellinfo::record_shell_launch(&perch, 2_000_000_000, launched_ms);\n 1215│        }\n 1216│        id\n 1217│    }\n     │...\n 1249│        .unwrap();\n*1250│        shellinfo::record_shell_launch(&binding_perch, std::process::id(), boot + 120_000);\n 1251│\n 1252│        let mut restored = restore_persistent_shells_at_boot(owlery, &registered, &adapters_dir);\n 1253│        restored.sort();\n     │...\n 1260│        assert_eq!(restored, expected);\n*1261│        assert_eq!(shellinfo::read_shell_pid(&binding_perch), Some(std::process::id()));\n 1262│    }\n 1263│\n 1264│    // [unit->REQ-SHELL-OWNER-ONLINE-RESTORE]\n     │...\n 1533│        std::fs::write(perch.join(shellinfo::SHELL_PID_FILE), pid.to_string()).unwrap();\n*1534│        shellinfo::record_shell_launch(&perch, pid, 1_000);\n*1535│        let mut launch = shellinfo::read_shell_launch(&perch).unwrap();\n 1536│        launch.pid_started_at = Some(\n 1537│            launch.pid_started_at.expect(\"native birth on supported platforms\") ^ 1,\n 1538│        );\n     │...\n 1801│            std::fs::write(perch.join(shellinfo::SHELL_PID_FILE), DEAD_PID.to_string()).unwrap();\n*1802│            let launch = shellinfo::ShellLaunch {\n 1803│                pid_started_at: Some(1),\n 1804│                launched_ms,\n 1805│            };\n\n#### tests/\n##### shell_kill_auth.rs#CC9B\n 60│    .unwrap();\n*61│    let bogus = spt_store::shellinfo::ShellLaunch {\n 62│        pid_started_at: Some(1),\n 63│        launched_ms: 1_000,\n 64│    };\n   │...\n 74│    assert!(\n*75│        spt_store::shellinfo::shell_pid_provably_dead(perch),\n 76│        \"control: the PAIR test reads a mismatched stamp as a corpse\"\n 77│    );\n 78│\n\n### spt/\n\n#### src/\n##### cli.rs#8B9D\n 32681│        .unwrap();\n*32682│        spt_store::shellinfo::record_shell_launch(&shell_perch, live, 1_000);\n 32683│        assert_eq!(relink(\"Scout\", \"doyle\"), 1, \"already online\");\n 32684│    }\n 32685│\n\n#### tests/\n##### activity_link_push_e2e.rs#FDAD\n 304│        .unwrap();\n*305│        spt_store::shellinfo::record_shell_launch(&shell_perch, keeper_pid, now_ms());\n 306│        let link_instant = now_ms();\n 307│        let (link_frame, _) = wait_for_state(&token_a, \"busy\", Duration::from_secs(10));\n 308│        let link_since: u64 = link_frame.attr(\"since\").unwrap().parse().unwrap();\n##### attach_link_push_e2e.rs#588B\n 352│        .unwrap();\n*353│        spt_store::shellinfo::record_shell_launch(&shell_perch, keeper_pid, now_ms());\n 354│\n 355│        // ── CLAUSE 1: current attachment at link time, with nothing to wait for.\n 356│        let first = wait_for_attach(\n    │...\n 500│        .unwrap();\n*501│        spt_store::shellinfo::record_shell_launch(&shell_perch, keeper.id(), now_ms());\n 502│\n 503│        let re = wait_for_attach(\n 504│            &token_b,\n##### drive_e2e.rs#AACF\n 187│    std::fs::write(shell_perch.join(\"shell.pid\"), stand_in.id().to_string()).unwrap();\n*188│    spt_store::shellinfo::record_shell_launch(&shell_perch, stand_in.id(), 1_000);\n 189│    let token_a = token_of();\n 190│\n 191│    // ── (1) DROP-AT-WRITE: driving an offline shell drops (exit 0, diagnostic),\n##### gateway_owner_shell_e2e.rs#C41A\n 231│    std::fs::write(shell_perch.join(\"shell.pid\"), stand_in.id().to_string()).unwrap();\n*232│    spt_store::shellinfo::record_shell_launch(&shell_perch, stand_in.id(), 1_000);\n 233│    online_by_token(&token_a);\n 234│\n 235│    // ── cmd (durable): a gateway-owned command vocab-checks + spools to the\n\n### spt-store/src/\n#### shellinfo.rs#D341\n 121│/// The recorded launch pid, if the perch parks a parseable one.\n*122│pub fn read_shell_pid(shell_perch: &Path) -> Option<u32> {\n 123│    std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n 124│        .ok()?\n 125│        .trim()\n    │...\n 151│#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]\n*152│pub struct ShellLaunch {\n 153│    /// The native start-time of the launched pid, when the platform offers one.\n 154│    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n 155│    pub pid_started_at: Option<u64>,\n    │...\n 164│// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n*165│pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) {\n*166│    let launch = ShellLaunch {\n 167│        pid_started_at: crate::proc::process_started_at(pid),\n 168│        launched_ms: now_ms,\n 169│    };\n    │...\n 177│/// compare\" rather than as a fault.\n*178│pub fn read_shell_launch(shell_perch: &Path) -> Option<ShellLaunch> {\n 179│    let raw = std::fs::read_to_string(shell_perch.join(SHELL_LAUNCH_FILE)).ok()?;\n 180│    serde_json::from_str(&raw).ok()\n 181│}\n    │...\n 197│// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n*198│pub fn shell_pid_provably_dead(shell_perch: &Path) -> bool {\n*199│    let Some(pid) = read_shell_pid(shell_perch).filter(|&pid| pid != 0) else {\n 200│        return false;\n 201│    };\n 202│    // BAROMETER W2 (releases#78): probe pid AND birth stamp, not the pid alone.\n    │...\n 213│    // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n*214│    let birth = read_shell_launch(shell_perch).and_then(|l| l.pid_started_at);\n 215│    matches!(\n 216│        crate::liveness::relay_liveness(Some(pid), birth),\n 217│        crate::liveness::RelayLiveness::Gone\n    │...\n 237│pub fn effective_status<'a>(shell_perch: &Path, info: &'a ShellInfo) -> &'a str {\n*238│    if info.status == SHELL_STATUS_ONLINE && shell_pid_provably_dead(shell_perch) {\n 239│        return SHELL_STATUS_OFFLINE;\n 240│    }\n 241│    &info.status\n    │...\n 461│        assert!(\n*462│            !shell_pid_provably_dead(d.path()),\n 463│            \"no stamp parked ⇒ the pre-existing fail-toward-alive stance holds\"\n 464│        );\n 465│\n 466│        // Now record a launch whose start-time is not this process's.\n*467│        let bogus = ShellLaunch {\n 468│            pid_started_at: Some(1),\n 469│            launched_ms: 1_000,\n 470│        };\n    │...\n 476│        assert!(\n*477│            shell_pid_provably_dead(d.path()),\n 478│            \"same pid, different process ⇒ our instance is gone, however alive that \\\n 479│             pid looks\"\n 480│        );\n    │...\n 493│        let d = online_perch(Some(&std::process::id().to_string()));\n*494│        record_shell_launch(d.path(), std::process::id(), 1_000);\n*495│        let parked = read_shell_launch(d.path()).expect(\"a launch stamp was parked\");\n 496│        assert_eq!(parked.launched_ms, 1_000, \"the absolute stamp round-trips\");\n 497│\n 498│        // On a platform with no start-time oracle the stamp is None and the pair\n    │...\n 500│        assert!(\n*501│            !shell_pid_provably_dead(d.path()),\n 502│            \"our own live process, stamped by its own launch, is not a corpse\"\n 503│        );\n 504│        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n    │...\n 516│        let dead = online_perch(Some(&DEAD_PID.to_string()));\n*517│        assert!(shell_pid_provably_dead(dead.path()));\n 518│        assert_eq!(\n 519│            status_of(&dead),\n 520│            SHELL_STATUS_OFFLINE,\n    │...\n 524│        let live = online_perch(Some(&std::process::id().to_string()));\n*525│        assert!(!shell_pid_provably_dead(live.path()));\n 526│        assert_eq!(status_of(&live), SHELL_STATUS_ONLINE, \"a live pid is online\");\n 527│\n 528│        // The fail-toward-alive arms — none of these is EVIDENCE of a corpse.\n    │...\n 536│            assert!(\n*537│                !shell_pid_provably_dead(d.path()),\n 538│                \"{label} is not proof of death\"\n 539│            );\n 540│            assert_eq!(status_of(&d), SHELL_STATUS_ONLINE, \"{label} stays online\");\n\n## docs/\n### KNOWN-HAZARDS.md#11D3\n   80│- **Watcher eligibility:** recorded `offline`, no live binary awaiting bind, and either `persistent`, no corpse, or a corpse whose launch predates the machine boot instant. A nonpersistent corpse without a launch stamp or boot oracle remains frozen; persistent instances require neither to become eligible. Birth-safe probes prevent a recycled pid from masquerading as a live shell.\n  *81│- **spt-core mapping:** `spt_store::shellinfo::{shell_pid_provably_dead, effective_status, is_shell_online}` (the resolver — the shell-side twin of 2.5's `liveness.rs`, which gave *agent* perches exactly this and which shells never got); consumers in `linkhost::{relink_shell, prepare_drive, run_action}`, `shelldisc::discover`, `activity::observe_links`; the class-(c) eligibility read is `spt_daemon::shellwake::watcher_eligible` (+ `launch_predates_boot`, `BOOT_RESTORE_SLACK_MS`), and the birth stamp it...\n   82│- **Source:** spt-core, flynn's spt-alchemy field report (2026-07-25) — a deterministic recipe, not a race. Class-(c) re-based BAROMETER W2 (releases#78, doyle's ruling on comment 5156810267).\n   83│\n   84│### 2.7 A daemon or machine restart strands `persistent` shells — and a graceful cascade fixture suppresses the failing arm `[REQ-HAZARD-RESTART-STRANDS-PERSISTENT-SHELLS]`\n     │...\n   90│- **Per-owner enumeration:** the existing `SHELL_RECORD_HEALED:<owner>/<shell_id>` daemon diagnostic names **every** successfully healed instance, not one representative. Healthy and already-healed records produce no event. The restore diagnostics likewise identify each attempted instance and distinguish boot from owner-online triggers. <!-- [doc->REQ-SHELL-HEAL-ENUMERATION] -->\n  *91│- **spt-core mapping:** `spt_daemon::shellwake::{heal_stale_online_records, restore_persistent_shells_at_boot, restore_persistent_shells_on_owner_online, OwnerOnlineEdge}`; `shellhost::live_launch_winner`; `spt_store::shellinfo::{ShellLaunch, shell_pid_provably_dead}`. `launch_predates_boot` and `BOOT_RESTORE_SLACK_MS` now govern only nonpersistent watcher eligibility.\n   92│- **Source:** BAROMETER W2 (releases#78); releases#287 operator ruling (2026-09-08), superseding the persistent force-kill freeze and boot-instant conjunct.\n   93│<!-- [doc->REQ-HAZARD-RESTART-STRANDS-PERSISTENT-SHELLS] -->\n   94│\n     │...\n  911│<!-- [doc->REQ-SHELL-KILL-AUTHENTICATED] -->\n *912│- **PRODUCT POPULATION (BAROMETER, releases#114 — this entry was scoped TEST-only until then, and that scoping was false the moment the product defect was proven).** The shipped shell lifecycle carried the identical violation. BAROMETER W2 authenticated the DERIVATION path (`shellinfo::shell_pid_provably_dead` runs the pair test) and left the KILL path believing a bare pid, so the very state the derived read calls a corpse still routed to `taskkill /PID <pid> /T /F`. Proven by probe, not inferred: a li...\n  913│- **A read-side gate is worthless where nothing was written to read.** `waker.pid` was parked bare, and `relay_liveness(live_pid, None)` is `Held` by design (pre-stamp records fail toward alive) — so a gate at `kill_waker_at` alone would have returned `Held` for every record that exists today and every one written tomorrow: a **vacuous** gate that proves green. Authenticating a kill therefore begins at the WRITE site. The pair is minted in the waker's single existing write as a two-line `waker.pid` (`<...\n  914│- **The pair test NARROWS the mis-fire; on Linux it does NOT eliminate it.** `process_started_at` reads `/proc/<pid>/stat` field 22, which counts `CLK_TCK = 100` jiffies, so two processes whose starts fall in the same 10ms tick carry an identical stamp and the pair cannot separate them. The window closes from *any recycled pid* to *a pid recycled into the same 10ms tick as the recorded start* — which requires our process to die AND the OS to hand its number to a new process inside one tick. Windows is ...\n  915│- **Migration window and downgrade direction, named rather than discovered.** Pre-W2 shell records and pre-fix waker records carry no stamp, read `Held` on existence alone, and keep the old bare-pid kill until their next launch writes a pair — the window is accepted, not closed. In the other direction, an OLD binary reading a NEW two-line `waker.pid` parse-fails to `None`, which reads as no-pid and refuses the kill: missed-kill, never mis-fire.\n     │...\n 1018│| 2.4 | gen_start = now() on cold-start + handoff | per-instance generation |\n*1019│| 2.6 | A shell's ONLINE-ness is DERIVED from recorded status and a not-provably-dead PID/birth pair. Abrupt death and daemon-stop leave stale `online` records; derive truth at gates/renders and heal each changed record once. The same-boot no-spontaneous-relaunch rule applies only to nonpersistent shells. Persistent instances follow 2.7 regardless of launch age. During new-launch publication, retire the previous birth before publishing the new PID; an unstable read is not proof of death | `spt_store::she...\n 1020│<!-- [doc->REQ-HAZARD-SHELL-STALE-ONLINE] -->\n 1021│| 2.7 | A once-per-generation boot sweep and each owner offline->online edge restore every instance whose adapter is `persistent`, owner is online, and binary is down in fact. Machine boot time, launch age, and absent launch stamps do not block persistent restoration; already-online and live binding launches are excluded. Heal every stale instance per owner with no repeat writes. Prove the restart shape without first suspending the fixture; a clean derived display alone is not evidence the record was hea...\n 1022│| 3.1 | Ephemeral perch cleanup on all exit paths | `ring` (RAII guard) |","linesTruncated":true,"meta":{"limits":{"columnTruncated":{"maxColumn":512}}}},"isError":false,"timestamp":1789002210938}}
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{"type":"message","id":"a8b0eee6","parentId":"54b97892","timestamp":"2026-09-10T01:03:35.290Z","message":{"role":"toolResult","toolCallId":"call_CuVHNUkOZnGmvBgnBTCLgJch|fc_0053347aa1a1a4a3016aa201e71b3887d1b744f03fdc42a7f5","toolName":"read","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/atomic.rs#4C8C]\n117:\n118:/// Shared tmp-write + atomic-rename core. `durable` selects the fsync-before-rename\n119:/// path ([`atomic_write_bytes_durable`]); otherwise a plain `fs::write` (the\n120:/// reconstructible-state default, [`atomic_write_bytes`]).\n121:///\n122:/// The tmp sibling is UNIQUE per write — `{name}.tmp.{pid}-{seq}` (KNOWN-HAZARDS\n123:/// 5.15). A fixed `{name}.tmp` shared by every writer is a latent collision: two\n124:/// processes writing the same target concurrently (e.g. the daemon's `mutate_info`\n125:/// RMW and `spt api bind`'s establish, traced ~700µs apart at bind) both stage the\n126:/// SAME tmp; whichever renames first CONSUMES it, and the loser's rename hits\n127:/// `NotFound` (os error 2) — non-transient, so it surfaces as a hard write error\n128:/// (the bind-fatal path that wedged the endpoint offline). A microsecond window\n129:/// forever; `sync_all` widened create→rename ~50× and made it near-certain at bind.\n130:// [impl->REQ-HAZARD-ATOMIC-TMP-COLLISION]\n131:fn write_then_rename(path: &Path, body: &[u8], durable: bool) -> io::Result<()> {\n132:    let seq = TMP_SEQ.fetch_add(1, Ordering::Relaxed);\n133:    let tmp = path.with_file_name(format!(\n134:        \"{}.tmp.{}-{}\",\n135:        path.file_name().and_then(|s| s.to_str()).unwrap_or(\"epoch\"),\n136:        std::process::id(),\n137:        seq\n138:    ));\n139:    if durable {\n140:        let mut f = fs::File::create(&tmp)?;\n141:        f.write_all(body)?;\n142:        f.sync_all()?; // durable data BEFORE the rename publishes the name\n143:    } else {\n144:        fs::write(&tmp, body)?;\n145:    }\n146:    match rename_with_retry(&tmp, path) {\n147:        Ok(()) => Ok(()),\n148:        Err(e) => {\n149:            // Best-effort cleanup of the orphaned tmp; never mask the real error.\n150:            let _ = fs::remove_file(&tmp);\n151:            Err(e)\n152:        }\n153:    }\n154:}\n155:\n156:/// Rename `from` → `to`, retrying transient sharing/access failures with\n157:/// linear backoff. Non-transient errors (e.g. NotFound) return immediately.\n158:// [impl->REQ-HAZARD-EBUSY-RENAME]\n159:fn rename_with_retry(from: &Path, to: &Path) -> io::Result<()> {\n160:    retry_transient(MAX_RENAME_ATTEMPTS, backoff, || fs::rename(from, to))\n161:}\n162:\n163:/// Linear backoff: attempt 1 → 2ms, attempt 2 → 4ms, … capped modestly. Kept\n164:/// small so a real transient (handle released within tens of ms) is absorbed\n165:/// without a perceptible stall.\n166:fn backoff(attempt: u32) -> Duration {\n167:    Duration::from_millis((attempt as u64 * 2).min(50))\n168:}\n169:\n170:/// Run `op`, retrying while it fails with a *transient* error, up to\n171:/// `max_attempts` total tries. Sleeps `delay(attempt)` between tries. Returns\n172:/// the first success, or the last error once attempts are exhausted /\n173:/// the error is non-transient. Generic over the operation so the retry\n174:/// semantics are unit-testable without provoking a real OS EBUSY.\n175:// [impl->REQ-HAZARD-EBUSY-RENAME]\n176:fn retry_transient<T>(\n177:    max_attempts: u32,\n178:    delay: impl Fn(u32) -> Duration,\n179:    mut op: impl FnMut() -> io::Result<T>,\n180:) -> io::Result<T> {\n181:    let mut attempt = 0u32;\n182:    loop {\n183:        match op() {\n184:            Ok(v) => return Ok(v),\n185:            Err(e) => {\n186:                attempt += 1;\n187:                if attempt >= max_attempts || !is_transient(&e) {\n188:                    return Err(e);\n189:                }\n190:                std::thread::sleep(delay(attempt));\n191:            }\n192:        }\n193:    }\n194:}\n195:\n196:/// Whether an io error is a transient sharing/access failure worth retrying.\n197:///\n198:/// Windows surfaces a held-handle rename collision as `ERROR_SHARING_VIOLATION`\n199:/// (32) or `ERROR_ACCESS_DENIED` (5). On other platforms `PermissionDenied`\n200:/// is the analogue; everything else (NotFound, etc.) is non-transient.\n201:fn is_transient(e: &io::Error) -> bool {\n202:    #[cfg(windows)]\n203:    {\n204:        if let Some(code) = e.raw_os_error() {\n205:            // 5 = ERROR_ACCESS_DENIED, 32 = ERROR_SHARING_VIOLATION.\n206:            return code == 5 || code == 32;\n207:        }\n208:    }\n209:    matches!(e.kind(), io::ErrorKind::PermissionDenied)\n210:}\n211:\n212:#[cfg(test)]\n213:mod tests {\n214:    use super::*;\n215:    use std::cell::Cell;\n216:    use std::path::PathBuf;\n217:\n218:    fn zero_delay(_: u32) -> Duration {\n219:        Duration::from_millis(0)\n220:    }\n221:\n222:    /// No `.tmp` sibling of any kind remains in `dir` (the unique tmp names —\n223:    /// `{name}.tmp.{pid}-{seq}` — must all be renamed away, not just a fixed\n224:    /// `{name}.tmp`). Glob-style: any entry whose name contains `.tmp` fails.\n225:    fn no_tmp_sibling_remains(dir: &Path) {\n226:        let leftover: Vec<String> = fs::read_dir(dir)\n227:            .unwrap()\n228:            .flatten()\n229:            .filter_map(|e| e.file_name().into_string().ok())\n230:            .filter(|n| n.contains(\".tmp\"))\n231:            .collect();\n…\n233:    }\n…\n392:}\n\n[Showing lines 117-228 of 392. Use :229 to continue]"}],"details":{"truncation":{"content":"\r\n/// Shared tmp-write + atomic-rename core. `durable` selects the fsync-before-rename\r\n/// path ([`atomic_write_bytes_durable`]); otherwise a plain `fs::write` (the\r\n/// reconstructible-state default, [`atomic_write_bytes`]).\r\n///\r\n/// The tmp sibling is UNIQUE per write — `{name}.tmp.{pid}-{seq}` (KNOWN-HAZARDS\r\n/// 5.15). A fixed `{name}.tmp` shared by every writer is a latent collision: two\r\n/// processes writing the same target concurrently (e.g. the daemon's `mutate_info`\r\n/// RMW and `spt api bind`'s establish, traced ~700µs apart at bind) both stage the\r\n/// SAME tmp; whichever renames first CONSUMES it, and the loser's rename hits\r\n/// `NotFound` (os error 2) — non-transient, so it surfaces as a hard write error\r\n/// (the bind-fatal path that wedged the endpoint offline). A microsecond window\r\n/// forever; `sync_all` widened create→rename ~50× and made it near-certain at bind.\r\n// [impl->REQ-HAZARD-ATOMIC-TMP-COLLISION]\r\nfn write_then_rename(path: &Path, body: &[u8], durable: bool) -> io::Result<()> {\r\n    let seq = TMP_SEQ.fetch_add(1, Ordering::Relaxed);\r\n    let tmp = path.with_file_name(format!(\r\n        \"{}.tmp.{}-{}\",\r\n        path.file_name().and_then(|s| s.to_str()).unwrap_or(\"epoch\"),\r\n        std::process::id(),\r\n        seq\r\n    ));\r\n    if durable {\r\n        let mut f = fs::File::create(&tmp)?;\r\n        f.write_all(body)?;\r\n        f.sync_all()?; // durable data BEFORE the rename publishes the name\r\n    } else {\r\n        fs::write(&tmp, body)?;\r\n    }\r\n    match rename_with_retry(&tmp, path) {\r\n        Ok(()) => Ok(()),\r\n        Err(e) => {\r\n            // Best-effort cleanup of the orphaned tmp; never mask the real error.\r\n            let _ = fs::remove_file(&tmp);\r\n            Err(e)\r\n        }\r\n    }\r\n}\r\n\r\n/// Rename `from` → `to`, retrying transient sharing/access failures with\r\n/// linear backoff. Non-transient errors (e.g. NotFound) return immediately.\r\n// [impl->REQ-HAZARD-EBUSY-RENAME]\r\nfn rename_with_retry(from: &Path, to: &Path) -> io::Result<()> {\r\n    retry_transient(MAX_RENAME_ATTEMPTS, backoff, || fs::rename(from, to))\r\n}\r\n\r\n/// Linear backoff: attempt 1 → 2ms, attempt 2 → 4ms, … capped modestly. Kept\r\n/// small so a real transient (handle released within tens of ms) is absorbed\r\n/// without a perceptible stall.\r\nfn backoff(attempt: u32) -> Duration {\r\n    Duration::from_millis((attempt as u64 * 2).min(50))\r\n}\r\n\r\n/// Run `op`, retrying while it fails with a *transient* error, up to\r\n/// `max_attempts` total tries. Sleeps `delay(attempt)` between tries. Returns\r\n/// the first success, or the last error once attempts are exhausted /\r\n/// the error is non-transient. Generic over the operation so the retry\r\n/// semantics are unit-testable without provoking a real OS EBUSY.\r\n// [impl->REQ-HAZARD-EBUSY-RENAME]\r\nfn retry_transient<T>(\r\n    max_attempts: u32,\r\n    delay: impl Fn(u32) -> Duration,\r\n    mut op: impl FnMut() -> io::Result<T>,\r\n) -> io::Result<T> {\r\n    let mut attempt = 0u32;\r\n    loop {\r\n        match op() {\r\n            Ok(v) => return Ok(v),\r\n            Err(e) => {\r\n                attempt += 1;\r\n                if attempt >= max_attempts || !is_transient(&e) {\r\n                    return Err(e);\r\n                }\r\n                std::thread::sleep(delay(attempt));\r\n            }\r\n        }\r\n    }\r\n}\r\n\r\n/// Whether an io error is a transient sharing/access failure worth retrying.\r\n///\r\n/// Windows surfaces a held-handle rename collision as `ERROR_SHARING_VIOLATION`\r\n/// (32) or `ERROR_ACCESS_DENIED` (5). On other platforms `PermissionDenied`\r\n/// is the analogue; everything else (NotFound, etc.) is non-transient.\r\nfn is_transient(e: &io::Error) -> bool {\r\n    #[cfg(windows)]\r\n    {\r\n        if let Some(code) = e.raw_os_error() {\r\n            // 5 = ERROR_ACCESS_DENIED, 32 = ERROR_SHARING_VIOLATION.\r\n            return code == 5 || code == 32;\r\n        }\r\n    }\r\n    matches!(e.kind(), io::ErrorKind::PermissionDenied)\r\n}\r\n\r\n#[cfg(test)]\r\nmod tests {\r\n    use super::*;\r\n    use std::cell::Cell;\r\n    use std::path::PathBuf;\r\n\r\n    fn zero_delay(_: u32) -> Duration {\r\n        Duration::from_millis(0)\r\n    }\r\n\r\n    /// No `.tmp` sibling of any kind remains in `dir` (the unique tmp names —\r\n    /// `{name}.tmp.{pid}-{seq}` — must all be renamed away, not just a fixed\r\n    /// `{name}.tmp`). Glob-style: any entry whose name contains `.tmp` fails.\r\n    fn no_tmp_sibling_remains(dir: &Path) {\r\n        let leftover: Vec<String> = fs::read_dir(dir)\r\n            .unwrap()\r\n            .flatten()\r","truncated":true,"truncatedBy":"lines","totalLines":276,"totalBytes":4533,"outputLines":112,"outputBytes":4533,"lastLinePartial":false,"firstLineExceedsLimit":false},"totalLines":392,"displayContent":{"text":"\r\n/// Shared tmp-write + atomic-rename core. `durable` selects the fsync-before-rename\r\n/// path ([`atomic_write_bytes_durable`]); otherwise a plain `fs::write` (the\r\n/// reconstructible-state default, [`atomic_write_bytes`]).\r\n///\r\n/// The tmp sibling is UNIQUE per write — `{name}.tmp.{pid}-{seq}` (KNOWN-HAZARDS\r\n/// 5.15). A fixed `{name}.tmp` shared by every writer is a latent collision: two\r\n/// processes writing the same target concurrently (e.g. the daemon's `mutate_info`\r\n/// RMW and `spt api bind`'s establish, traced ~700µs apart at bind) both stage the\r\n/// SAME tmp; whichever renames first CONSUMES it, and the loser's rename hits\r\n/// `NotFound` (os error 2) — non-transient, so it surfaces as a hard write error\r\n/// (the bind-fatal path that wedged the endpoint offline). A microsecond window\r\n/// forever; `sync_all` widened create→rename ~50× and made it near-certain at bind.\r\n// [impl->REQ-HAZARD-ATOMIC-TMP-COLLISION]\r\nfn write_then_rename(path: &Path, body: &[u8], durable: bool) -> io::Result<()> {\r\n    let seq = TMP_SEQ.fetch_add(1, Ordering::Relaxed);\r\n    let tmp = path.with_file_name(format!(\r\n        \"{}.tmp.{}-{}\",\r\n        path.file_name().and_then(|s| s.to_str()).unwrap_or(\"epoch\"),\r\n        std::process::id(),\r\n        seq\r\n    ));\r\n    if durable {\r\n        let mut f = fs::File::create(&tmp)?;\r\n        f.write_all(body)?;\r\n        f.sync_all()?; // durable data BEFORE the rename publishes the name\r\n    } else {\r\n        fs::write(&tmp, body)?;\r\n    }\r\n    match rename_with_retry(&tmp, path) {\r\n        Ok(()) => Ok(()),\r\n        Err(e) => {\r\n            // Best-effort cleanup of the orphaned tmp; never mask the real error.\r\n            let _ = fs::remove_file(&tmp);\r\n            Err(e)\r\n        }\r\n    }\r\n}\r\n\r\n/// Rename `from` → `to`, retrying transient sharing/access failures with\r\n/// linear backoff. Non-transient errors (e.g. NotFound) return immediately.\r\n// [impl->REQ-HAZARD-EBUSY-RENAME]\r\nfn rename_with_retry(from: &Path, to: &Path) -> io::Result<()> {\r\n    retry_transient(MAX_RENAME_ATTEMPTS, backoff, || fs::rename(from, to))\r\n}\r\n\r\n/// Linear backoff: attempt 1 → 2ms, attempt 2 → 4ms, … capped modestly. Kept\r\n/// small so a real transient (handle released within tens of ms) is absorbed\r\n/// without a perceptible stall.\r\nfn backoff(attempt: u32) -> Duration {\r\n    Duration::from_millis((attempt as u64 * 2).min(50))\r\n}\r\n\r\n/// Run `op`, retrying while it fails with a *transient* error, up to\r\n/// `max_attempts` total tries. Sleeps `delay(attempt)` between tries. Returns\r\n/// the first success, or the last error once attempts are exhausted /\r\n/// the error is non-transient. Generic over the operation so the retry\r\n/// semantics are unit-testable without provoking a real OS EBUSY.\r\n// [impl->REQ-HAZARD-EBUSY-RENAME]\r\nfn retry_transient<T>(\r\n    max_attempts: u32,\r\n    delay: impl Fn(u32) -> Duration,\r\n    mut op: impl FnMut() -> io::Result<T>,\r\n) -> io::Result<T> {\r\n    let mut attempt = 0u32;\r\n    loop {\r\n        match op() {\r\n            Ok(v) => return Ok(v),\r\n            Err(e) => {\r\n                attempt += 1;\r\n                if attempt >= max_attempts || !is_transient(&e) {\r\n                    return Err(e);\r\n                }\r\n                std::thread::sleep(delay(attempt));\r\n            }\r\n        }\r\n    }\r\n}\r\n\r\n/// Whether an io error is a transient sharing/access failure worth retrying.\r\n///\r\n/// Windows surfaces a held-handle rename collision as `ERROR_SHARING_VIOLATION`\r\n/// (32) or `ERROR_ACCESS_DENIED` (5). On other platforms `PermissionDenied`\r\n/// is the analogue; everything else (NotFound, etc.) is non-transient.\r\nfn is_transient(e: &io::Error) -> bool {\r\n    #[cfg(windows)]\r\n    {\r\n        if let Some(code) = e.raw_os_error() {\r\n            // 5 = ERROR_ACCESS_DENIED, 32 = ERROR_SHARING_VIOLATION.\r\n            return code == 5 || code == 32;\r\n        }\r\n    }\r\n    matches!(e.kind(), io::ErrorKind::PermissionDenied)\r\n}\r\n\r\n#[cfg(test)]\r\nmod tests {\r\n    use super::*;\r\n    use std::cell::Cell;\r\n    use std::path::PathBuf;\r\n\r\n    fn zero_delay(_: u32) -> Duration {\r\n        Duration::from_millis(0)\r\n    }\r\n\r\n    /// No `.tmp` sibling of any kind remains in `dir` (the unique tmp names —\r\n    /// `{name}.tmp.{pid}-{seq}` — must all be renamed away, not just a fixed\r\n    /// `{name}.tmp`). Glob-style: any entry whose name contains `.tmp` fails.\r\n    fn no_tmp_sibling_remains(dir: &Path) {\r\n        let leftover: Vec<String> = fs::read_dir(dir)\r\n            .unwrap()\r\n            .flatten()\r\n            .filter_map(|e| e.file_name().into_string().ok())\n            .filter(|n| n.contains(\".tmp\"))\n            .collect();\n…\n    }\n…\n}","startLine":117,"lineNumbers":[117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,null,233,null,392]},"fileSize":18102,"meta":{"source":{"type":"path","value":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\atomic.rs"},"truncation":{"direction":"head","truncatedBy":"lines","totalLines":392,"totalBytes":4533,"outputLines":112,"outputBytes":4533,"shownRange":{"start":117,"end":228},"nextOffset":229}}},"isError":false,"timestamp":1789002215290}}
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{"type":"message","id":"29131160","parentId":"aec10af7","timestamp":"2026-09-10T01:03:46.500Z","message":{"role":"assistant","content":[{"type":"thinking","thinking":"**Implementing zero-read returns**\n\n**Adding portable regression tests**"},{"type":"toolCall","id":"call_5rZpiiwo0ETHD9IXxiBwS1iS|fc_0053347aa1a1a4a3016aa201f099e087d18db4e76877708eb1","name":"hub","arguments":{"i":"Clarifying coherent read semantics","op":"send","to":"ShellIdentityCallers","message":"Store read_shell_process returns Some((0,None)) for modern cleared/pidless record; read_shell_pid delegates and returns Some(0). Consumers should filter PID != 0. Modern nonzero PID and birth come from one parsed JSON record; legacy tuple comes from numeric mirror + optional legacy birth. 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Consumers should filter PID != 0. Modern nonzero PID and birth come from one parsed JSON record; legacy tuple comes from numeric mirror + optional legacy birth. LSP device unavailable; complete grep done.\"}","call_id":"call_5rZpiiwo0ETHD9IXxiBwS1iS","internal_chat_message_metadata_passthrough":{"create_time":1789002216.102589,"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"},"name":"hub","metadata":{"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"}}]},"duration":11159.446700000204,"ttft":1628.8960000006482,"completedAt":1789002226499,"contextSnapshot":{"promptTokens":38631,"nonMessageTokens":17013,"compactionEpoch":0}}}
{"type":"message","id":"2ccc7184","parentId":"29131160","timestamp":"2026-09-10T01:03:46.501Z","message":{"role":"toolResult","toolCallId":"call_5rZpiiwo0ETHD9IXxiBwS1iS|fc_0053347aa1a1a4a3016aa201f099e087d18db4e76877708eb1","toolName":"hub","content":[{"type":"text","text":"Delivered to 1 peer(s):\n- ShellIdentityCallers: injected"}],"details":{"op":"send","from":"ShellIdentityStore","to":"ShellIdentityCallers","receipts":[{"to":"ShellIdentityCallers","outcome":"injected"}]},"isError":false,"timestamp":1789002226501}}
{"type":"custom","customType":"tool_execution_start","data":{"toolCallId":"call_W4pLecP0m4ckc1ye31PSkzGn|ctc_0053347aa1a1a4a3016aa201f4b98887d1994adf58b316eeb3","toolName":"edit","startedAt":"2026-09-10T01:04:20.114Z"},"id":"1b2a1c78","parentId":"2ccc7184","timestamp":"2026-09-10T01:04:20.114Z"}
{"type":"message","id":"5d0cc078","parentId":"1b2a1c78","timestamp":"2026-09-10T01:04:20.114Z","message":{"role":"assistant","content":[{"type":"toolCall","id":"call_W4pLecP0m4ckc1ye31PSkzGn|ctc_0053347aa1a1a4a3016aa201f4b98887d1994adf58b316eeb3","name":"edit","arguments":{"input":"*** Begin Patch\n[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#D341]\nPUT 116.=118:\n+/// Numeric compatibility mirror of the launched pid for older core readers.\n+/// Modern readers use the coherent identity in [`SHELL_LAUNCH_FILE`].\nPUT 121.=128:\n+/// The recorded launch pid, preferring the coherent modern process record.\n+pub fn read_shell_pid(shell_perch: &Path) -> Option<u32> {\n+    read_shell_process(shell_perch).map(|(pid, _)| pid)\n+}\nPUT 130.=131:\n+/// `<shell_perch>/shell.launch.json` — coherent process identity and launch age.\nPUT 136.=137:\n+/// The PID and native birth identify one process generation atomically. The\n+/// two timestamps answer different questions:\nPUT >152:\n+    /// `None` is legacy; `Some(0)` explicitly records no process identity.\n+    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n+    pub pid: Option<u32>,\nPUT 160.=173:\n+/// Publish a just-launched process identity before its numeric compatibility\n+/// mirror. A failed mandatory JSON replacement leaves the old identity intact\n+/// and must be handled by the caller; a failed mirror write cannot invalidate\n+/// the successfully published modern record.\n+// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) -> std::io::Result<()> {\n+    let launch = ShellLaunch {\n+        pid: Some(pid),\n+        pid_started_at: if pid == 0 { None } else { crate::proc::process_started_at(pid) },\n+        launched_ms: now_ms,\n+    };\n+    let json = serde_json::to_string_pretty(&launch)?;\n+    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n+    let _ = atomic_write_string(&shell_perch.join(SHELL_PID_FILE), &pid.to_string());\n+    Ok(())\n+}\nPUT >181:\n+\n+/// Read one process generation. Modern PID and birth always come from the same\n+/// parsed record; a modern zero never falls back to a stale numeric mirror or\n+/// residual birth. Pre-coherent records retain numeric-PID compatibility.\n+// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n+    let launch = read_shell_launch(shell_perch);\n+    if let Some(pid) = launch.as_ref().and_then(|launch| launch.pid) {\n+        let birth = if pid == 0 { None } else { launch?.pid_started_at };\n+        return Some((pid, birth));\n+    }\n+    let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n+        .ok()?\n+        .trim()\n+        .parse()\n+        .ok()?;\n+    Some((pid, launch.and_then(|launch| launch.pid_started_at)))\n+}\n+\n+/// Retire the process identity without resetting its launch age. The coherent\n+/// cleared record is mandatory and precedes removal of the compatibility\n+/// mirror, so any failed replacement leaves the old evidence untouched.\n+// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+pub fn clear_shell_pid(shell_perch: &Path) -> std::io::Result<()> {\n+    let mut launch = read_shell_launch(shell_perch).unwrap_or_default();\n+    launch.pid = Some(0);\n+    launch.pid_started_at = None;\n+    let json = serde_json::to_string_pretty(&launch)?;\n+    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n+    match std::fs::remove_file(shell_perch.join(SHELL_PID_FILE)) {\n+        Err(e) if e.kind() != std::io::ErrorKind::NotFound => Err(e),\n+        _ => Ok(()),\n+    }\n+}\nPUT 195.=196:\n+/// A recycled pid is provably gone only when its native birth differs. Missing\n+/// birth evidence or an inaccessible process continues to fail toward alive.\nPUT 199.=199:\n+    let Some((pid, birth)) = read_shell_process(shell_perch).filter(|&(pid, _)| pid != 0) else {\nCUT 214.=214\nPUT >467:\n+            pid: None,\nPUT 494.=494:\n+        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n*** End Patch\n"},"customWireName":"edit"}],"api":"openai-codex-responses","provider":"openai-codex","model":"gpt-6-astra","usage":{"input":445,"output":1049,"cacheRead":38528,"cacheWrite":0,"totalTokens":40022,"cost":{"input":0,"output":0,"cacheRead":0,"cacheWrite":0,"total":0}},"stopReason":"toolUse","timestamp":1789002226545,"responseId":"resp_0053347aa1a1a4a3016aa201f2d05087d1b35a1018f0add056","providerPayload":{"type":"openaiResponsesHistory","provider":"openai-codex","dt":true,"items":[{"id":"ctc_0053347aa1a1a4a3016aa201f4b98887d1994adf58b316eeb3","type":"custom_tool_call","status":"completed","call_id":"call_W4pLecP0m4ckc1ye31PSkzGn","input":"*** Begin Patch\n[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#D341]\nPUT 116.=118:\n+/// Numeric compatibility mirror of the launched pid for older core readers.\n+/// Modern readers use the coherent identity in [`SHELL_LAUNCH_FILE`].\nPUT 121.=128:\n+/// The recorded launch pid, preferring the coherent modern process record.\n+pub fn read_shell_pid(shell_perch: &Path) -> Option<u32> {\n+    read_shell_process(shell_perch).map(|(pid, _)| pid)\n+}\nPUT 130.=131:\n+/// `<shell_perch>/shell.launch.json` — coherent process identity and launch age.\nPUT 136.=137:\n+/// The PID and native birth identify one process generation atomically. The\n+/// two timestamps answer different questions:\nPUT >152:\n+    /// `None` is legacy; `Some(0)` explicitly records no process identity.\n+    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n+    pub pid: Option<u32>,\nPUT 160.=173:\n+/// Publish a just-launched process identity before its numeric compatibility\n+/// mirror. A failed mandatory JSON replacement leaves the old identity intact\n+/// and must be handled by the caller; a failed mirror write cannot invalidate\n+/// the successfully published modern record.\n+// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) -> std::io::Result<()> {\n+    let launch = ShellLaunch {\n+        pid: Some(pid),\n+        pid_started_at: if pid == 0 { None } else { crate::proc::process_started_at(pid) },\n+        launched_ms: now_ms,\n+    };\n+    let json = serde_json::to_string_pretty(&launch)?;\n+    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n+    let _ = atomic_write_string(&shell_perch.join(SHELL_PID_FILE), &pid.to_string());\n+    Ok(())\n+}\nPUT >181:\n+\n+/// Read one process generation. Modern PID and birth always come from the same\n+/// parsed record; a modern zero never falls back to a stale numeric mirror or\n+/// residual birth. Pre-coherent records retain numeric-PID compatibility.\n+// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n+    let launch = read_shell_launch(shell_perch);\n+    if let Some(pid) = launch.as_ref().and_then(|launch| launch.pid) {\n+        let birth = if pid == 0 { None } else { launch?.pid_started_at };\n+        return Some((pid, birth));\n+    }\n+    let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n+        .ok()?\n+        .trim()\n+        .parse()\n+        .ok()?;\n+    Some((pid, launch.and_then(|launch| launch.pid_started_at)))\n+}\n+\n+/// Retire the process identity without resetting its launch age. The coherent\n+/// cleared record is mandatory and precedes removal of the compatibility\n+/// mirror, so any failed replacement leaves the old evidence untouched.\n+// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+pub fn clear_shell_pid(shell_perch: &Path) -> std::io::Result<()> {\n+    let mut launch = read_shell_launch(shell_perch).unwrap_or_default();\n+    launch.pid = Some(0);\n+    launch.pid_started_at = None;\n+    let json = serde_json::to_string_pretty(&launch)?;\n+    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n+    match std::fs::remove_file(shell_perch.join(SHELL_PID_FILE)) {\n+        Err(e) if e.kind() != std::io::ErrorKind::NotFound => Err(e),\n+        _ => Ok(()),\n+    }\n+}\nPUT 195.=196:\n+/// A recycled pid is provably gone only when its native birth differs. Missing\n+/// birth evidence or an inaccessible process continues to fail toward alive.\nPUT 199.=199:\n+    let Some((pid, birth)) = read_shell_process(shell_perch).filter(|&(pid, _)| pid != 0) else {\nCUT 214.=214\nPUT >467:\n+            pid: None,\nPUT 494.=494:\n+        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n*** End Patch\n","internal_chat_message_metadata_passthrough":{"create_time":1789002227.061698,"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"},"name":"edit","metadata":{"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"}}]},"duration":33567.82319999952,"ttft":2207.6888999994844,"completedAt":1789002260113,"contextSnapshot":{"promptTokens":38973,"nonMessageTokens":17013,"compactionEpoch":0}}}
{"type":"message","id":"081dccab","parentId":"5d0cc078","timestamp":"2026-09-10T01:04:20.138Z","message":{"role":"toolResult","toolCallId":"call_W4pLecP0m4ckc1ye31PSkzGn|ctc_0053347aa1a1a4a3016aa201f4b98887d1994adf58b316eeb3","toolName":"edit","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#861B]\n110:pub fn write_shell_info(shell_perch: &Path, info: &ShellInfo) -> std::io::Result<()> {\n\n114:}\n115:\n116:/// Numeric compatibility mirror of the launched pid for older core readers.\n117:/// Modern readers use the coherent identity in [`SHELL_LAUNCH_FILE`].\n118:pub const SHELL_PID_FILE: &str = \"shell.pid\";\n119:\n120:/// The recorded launch pid, preferring the coherent modern process record.\n121:pub fn read_shell_pid(shell_perch: &Path) -> Option<u32> {\n122:    read_shell_process(shell_perch).map(|(pid, _)| pid)\n123:}\n124:\n125:/// `<shell_perch>/shell.launch.json` — coherent process identity and launch age.\n126:pub const SHELL_LAUNCH_FILE: &str = \"shell.launch.json\";\n127:\n128:/// What a launch recorded about the process it started.\n129:///\n130:/// The PID and native birth identify one process generation atomically. The\n131:/// two timestamps answer different questions:\n132:///\n133:/// - `pid_started_at` is the platform's NATIVE start-time value, used for one\n145:#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]\n146:pub struct ShellLaunch {\n147:    /// `None` is legacy; `Some(0)` explicitly records no process identity.\n148:    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n149:    pub pid: Option<u32>,\n150:    /// The native start-time of the launched pid, when the platform offers one.\n151:    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n155:}\n156:\n157:/// Publish a just-launched process identity before its numeric compatibility\n158:/// mirror. A failed mandatory JSON replacement leaves the old identity intact\n159:/// and must be handled by the caller; a failed mirror write cannot invalidate\n160:/// the successfully published modern record.\n161:// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n162:// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n163:pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) -> std::io::Result<()> {\n164:    let launch = ShellLaunch {\n165:        pid: Some(pid),\n166:        pid_started_at: if pid == 0 { None } else { crate::proc::process_started_at(pid) },\n167:        launched_ms: now_ms,\n168:    };\n169:    let json = serde_json::to_string_pretty(&launch)?;\n170:    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n171:    let _ = atomic_write_string(&shell_perch.join(SHELL_PID_FILE), &pid.to_string());\n172:    Ok(())\n173:}\n174:\n\n178:pub fn read_shell_launch(shell_perch: &Path) -> Option<ShellLaunch> {\n\n181:}\n182:\n183:/// Read one process generation. Modern PID and birth always come from the same\n184:/// parsed record; a modern zero never falls back to a stale numeric mirror or\n…\n216:}\n217:\n218:/// **The** discriminant behind [`effective_status`]: is this instance's recorded\n219:/// binary *provably* gone? Narrow on purpose — true only when the perch parks a\n228:/// backend it cannot see.\n229:///\n230:/// A recycled pid is provably gone only when its native birth differs. Missing\n231:/// birth evidence or an inaccessible process continues to fail toward alive.\n232:// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n233:pub fn shell_pid_provably_dead(shell_perch: &Path) -> bool {\n234:    let Some((pid, birth)) = read_shell_process(shell_perch).filter(|&(pid, _)| pid != 0) else {\n235:        return false;\n236:    };\n247:    // time, still falls back to plain absence and fails toward ALIVE.\n248:    // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n249:    matches!(\n250:        crate::liveness::relay_liveness(Some(pid), birth),\n\n252:    )\n253:}\n\n500:        // Now record a launch whose start-time is not this process's.\n501:        let bogus = ShellLaunch {\n502:            pid: None,\n503:            pid_started_at: Some(1),\n504:            launched_ms: 1_000,\n505:        };\n\n527:    fn a_live_pid_with_its_own_birth_stamp_is_held() {\n528:        let d = online_perch(Some(&std::process::id().to_string()));\n529:        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n530:        let parked = read_shell_launch(d.path()).expect(\"a launch stamp was parked\");\n531:        assert_eq!(parked.launched_ms, 1_000, \"the absolute stamp round-trips\");\n\n540:    }"}],"details":{"diff":" 110|pub fn write_shell_info(shell_perch: &Path, info: &ShellInfo) -> std::io::Result<()> {\n\n 114|}\n 115|\n-116|/// The launched binary's recorded pid, one file per instance perch. Written by\n-117|/// the launch, removed by the close — and the ONLY on-disk evidence that the\n-118|/// process a record calls `online` still exists.\n+116|/// Numeric compatibility mirror of the launched pid for older core readers.\n+117|/// Modern readers use the coherent identity in [`SHELL_LAUNCH_FILE`].\n 119|pub const SHELL_PID_FILE: &str = \"shell.pid\";\n 120|\n-121|/// The recorded launch pid, if the perch parks a parseable one.\n+120|/// The recorded launch pid, preferring the coherent modern process record.\n 122|pub fn read_shell_pid(shell_perch: &Path) -> Option<u32> {\n-123|    std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n-124|        .ok()?\n-125|        .trim()\n-126|        .parse()\n-127|        .ok()\n+122|    read_shell_process(shell_perch).map(|(pid, _)| pid)\n 128|}\n 129|\n-130|/// `<shell_perch>/shell.launch.json` — the birth stamp parked beside the pid at\n-131|/// launch (BAROMETER W2, releases#78).\n+125|/// `<shell_perch>/shell.launch.json` — coherent process identity and launch age.\n 132|pub const SHELL_LAUNCH_FILE: &str = \"shell.launch.json\";\n 133|\n 134|/// What a launch recorded about the process it started.\n 135|///\n-136|/// TWO VALUES, ANSWERING TWO DIFFERENT QUESTIONS, and keeping them apart is the\n-137|/// whole point of the shape:\n+130|/// The PID and native birth identify one process generation atomically. The\n+131|/// two timestamps answer different questions:\n 138|///\n 139|/// - `pid_started_at` is the platform's NATIVE start-time value, used for one\n 151|#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]\n 152|pub struct ShellLaunch {\n+147|    /// `None` is legacy; `Some(0)` explicitly records no process identity.\n+148|    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n+149|    pub pid: Option<u32>,\n 153|    /// The native start-time of the launched pid, when the platform offers one.\n 154|    #[serde(default, skip_serializing_if = \"Option::is_none\")]\n 158|}\n 159|\n-160|/// Record the birth stamp for a just-launched `pid`. Best-effort: a stamp that\n-161|/// cannot be written must never fail the launch — a missing stamp degrades the\n-162|/// probe to its pre-existing fail-toward-alive behaviour, which is the safe\n-163|/// direction, while a failed launch is a real outage.\n+157|/// Publish a just-launched process identity before its numeric compatibility\n+158|/// mirror. A failed mandatory JSON replacement leaves the old identity intact\n+159|/// and must be handled by the caller; a failed mirror write cannot invalidate\n+160|/// the successfully published modern record.\n 164|// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n-165|pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) {\n+162|// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+163|pub fn record_shell_launch(shell_perch: &Path, pid: u32, now_ms: u64) -> std::io::Result<()> {\n 166|    let launch = ShellLaunch {\n-167|        pid_started_at: crate::proc::process_started_at(pid),\n+165|        pid: Some(pid),\n+166|        pid_started_at: if pid == 0 { None } else { crate::proc::process_started_at(pid) },\n 168|        launched_ms: now_ms,\n 169|    };\n-170|    if let Ok(json) = serde_json::to_string_pretty(&launch) {\n-171|        let _ = atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json);\n-172|    }\n+169|    let json = serde_json::to_string_pretty(&launch)?;\n+170|    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n+171|    let _ = atomic_write_string(&shell_perch.join(SHELL_PID_FILE), &pid.to_string());\n+172|    Ok(())\n 173|}\n 174|\n\n 178|pub fn read_shell_launch(shell_perch: &Path) -> Option<ShellLaunch> {\n\n 181|}\n 182|\n+183|/// Read one process generation. Modern PID and birth always come from the same\n+184|/// parsed record; a modern zero never falls back to a stale numeric mirror or\n+185|/// residual birth. Pre-coherent records retain numeric-PID compatibility.\n+186|// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+187|// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+188|pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n+189|    let launch = read_shell_launch(shell_perch);\n+190|    if let Some(pid) = launch.as_ref().and_then(|launch| launch.pid) {\n+191|        let birth = if pid == 0 { None } else { launch?.pid_started_at };\n+192|        return Some((pid, birth));\n+193|    }\n+194|    let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n+195|        .ok()?\n+196|        .trim()\n+197|        .parse()\n+198|        .ok()?;\n+199|    Some((pid, launch.and_then(|launch| launch.pid_started_at)))\n+200|}\n+201|\n+202|/// Retire the process identity without resetting its launch age. The coherent\n+203|/// cleared record is mandatory and precedes removal of the compatibility\n+204|/// mirror, so any failed replacement leaves the old evidence untouched.\n+205|// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n+206|pub fn clear_shell_pid(shell_perch: &Path) -> std::io::Result<()> {\n+207|    let mut launch = read_shell_launch(shell_perch).unwrap_or_default();\n+208|    launch.pid = Some(0);\n+209|    launch.pid_started_at = None;\n+210|    let json = serde_json::to_string_pretty(&launch)?;\n+211|    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n+212|    match std::fs::remove_file(shell_perch.join(SHELL_PID_FILE)) {\n+213|        Err(e) if e.kind() != std::io::ErrorKind::NotFound => Err(e),\n+214|        _ => Ok(()),\n+215|    }\n+216|}\n+217|\n 183|/// **The** discriminant behind [`effective_status`]: is this instance's recorded\n 184|/// binary *provably* gone? Narrow on purpose — true only when the perch parks a\n 193|/// backend it cannot see.\n 194|///\n-195|/// Recycled pids read alive, so a heal can be **missed** but never **mis-fired**\n-196|/// — the failure direction is \"stays stale\", never \"tears down a live instance\".\n+230|/// A recycled pid is provably gone only when its native birth differs. Missing\n+231|/// birth evidence or an inaccessible process continues to fail toward alive.\n 197|// [impl->REQ-HAZARD-SHELL-STALE-ONLINE]\n 198|pub fn shell_pid_provably_dead(shell_perch: &Path) -> bool {\n-199|    let Some(pid) = read_shell_pid(shell_perch).filter(|&pid| pid != 0) else {\n+234|    let Some((pid, birth)) = read_shell_process(shell_perch).filter(|&(pid, _)| pid != 0) else {\n 200|        return false;\n 201|    };\n 212|    // time, still falls back to plain absence and fails toward ALIVE.\n 213|    // [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n-214|    let birth = read_shell_launch(shell_perch).and_then(|l| l.pid_started_at);\n 215|    matches!(\n 216|        crate::liveness::relay_liveness(Some(pid), birth),\n\n 218|    )\n 219|}\n\n 466|        // Now record a launch whose start-time is not this process's.\n 467|        let bogus = ShellLaunch {\n+502|            pid: None,\n 468|            pid_started_at: Some(1),\n 469|            launched_ms: 1_000,\n 470|        };\n\n 492|    fn a_live_pid_with_its_own_birth_stamp_is_held() {\n 493|        let d = online_perch(Some(&std::process::id().to_string()));\n-494|        record_shell_launch(d.path(), std::process::id(), 1_000);\n+529|        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n 495|        let parked = read_shell_launch(d.path()).expect(\"a launch stamp was parked\");\n 496|        assert_eq!(parked.launched_ms, 1_000, \"the absolute stamp round-trips\");\n\n 505|    }","firstChangedLine":116,"op":"update","path":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\shellinfo.rs","snapshotsPruned":true},"isError":false,"timestamp":1789002260138}}
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{"type":"message","id":"06e251b3","parentId":"80b80455","timestamp":"2026-09-10T01:04:34.955Z","message":{"role":"toolResult","toolCallId":"call_kBDxf6yz1BifEWJWuLHd8GRw|fc_0053347aa1a1a4a3016aa20222b62887d19f34e91e27d86f6d","toolName":"read","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#861B]\n183:/// Read one process generation. Modern PID and birth always come from the same\n184:/// parsed record; a modern zero never falls back to a stale numeric mirror or\n185:/// residual birth. Pre-coherent records retain numeric-PID compatibility.\n186:// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n187:// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n188:pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n189:    let launch = read_shell_launch(shell_perch);\n190:    if let Some(pid) = launch.as_ref().and_then(|launch| launch.pid) {\n191:        let birth = if pid == 0 { None } else { launch?.pid_started_at };\n192:        return Some((pid, birth));\n193:    }\n194:    let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n195:        .ok()?\n196:        .trim()\n197:        .parse()\n198:        .ok()?;\n199:    Some((pid, launch.and_then(|launch| launch.pid_started_at)))\n200:}\n201:\n202:/// Retire the process identity without resetting its launch age. The coherent\n203:/// cleared record is mandatory and precedes removal of the compatibility\n204:/// mirror, so any failed replacement leaves the old evidence untouched.\n205:// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n206:pub fn clear_shell_pid(shell_perch: &Path) -> std::io::Result<()> {\n207:    let mut launch = read_shell_launch(shell_perch).unwrap_or_default();\n208:    launch.pid = Some(0);\n209:    launch.pid_started_at = None;\n210:    let json = serde_json::to_string_pretty(&launch)?;\n211:    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n212:    match std::fs::remove_file(shell_perch.join(SHELL_PID_FILE)) {\n213:        Err(e) if e.kind() != std::io::ErrorKind::NotFound => Err(e),\n214:        _ => Ok(()),\n215:    }\n216:}\n…\n478:    // birth stamp does not match what the launch recorded reads GONE.\n479:    //\n480:    // THIS IS THE ROW THE SHIPPED PROBE CANNOT PASS, and it is the whole reason the\n481:    // stamp exists. Bare-pid liveness answers \"is something running under this\n482:    // number\", which after a reboot is a question about an unrelated process: the\n483:    // pid namespace reset, some other program took the number, the corpse reads\n484:    // ALIVE, the derived status reads online, and `relink` then refuses\n485:    // SHELL_ALREADY_ONLINE on the one instance that needs recovering.\n486:    //\n487:    // The fixture uses OUR OWN pid, which is genuinely alive, with a recorded birth\n488:    // that cannot be ours — so any implementation that consults liveness alone\n489:    // reports alive here and fails, while the pair test reports gone.\n490:    #[test]\n491:    fn a_live_pid_with_a_foreign_birth_stamp_reads_gone() {\n492:        let d = online_perch(Some(&std::process::id().to_string()));\n493:        // Sanity: without a stamp this instance reads ALIVE — i.e. the fixture is\n494:        // not accidentally proving the point through some other absence.\n495:        assert!(\n496:            !shell_pid_provably_dead(d.path()),\n497:            \"no stamp parked ⇒ the pre-existing fail-toward-alive stance holds\"\n498:        );\n499:\n500:        // Now record a launch whose start-time is not this process's.\n501:        let bogus = ShellLaunch {\n502:            pid: None,\n503:            pid_started_at: Some(1),\n504:            launched_ms: 1_000,\n505:        };\n506:        std::fs::write(\n507:            d.path().join(SHELL_LAUNCH_FILE),\n508:            serde_json::to_string(&bogus).unwrap(),\n509:        )\n510:        .unwrap();\n511:        assert!(\n512:            shell_pid_provably_dead(d.path()),\n513:            \"same pid, different process ⇒ our instance is gone, however alive that \\\n514:             pid looks\"\n515:        );\n516:        assert_eq!(\n517:            status_of(&d),\n518:            SHELL_STATUS_OFFLINE,\n519:            \"and the derived status follows, which is what unblocks relink\"\n520:        );\n521:    }\n522:\n523:    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE] the paired half: a live pid whose\n524:    // stamp DOES match is held, so the stamp cannot be satisfied by an\n525:    // implementation that simply calls every stamped instance dead.\n526:    #[test]\n527:    fn a_live_pid_with_its_own_birth_stamp_is_held() {\n528:        let d = online_perch(Some(&std::process::id().to_string()));\n529:        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n530:        let parked = read_shell_launch(d.path()).expect(\"a launch stamp was parked\");\n531:        assert_eq!(parked.launched_ms, 1_000, \"the absolute stamp round-trips\");\n532:\n533:        // On a platform with no start-time oracle the stamp is None and the pair\n534:        // test cannot fire; the row still must not report a live process dead.\n535:        assert!(\n536:            !shell_pid_provably_dead(d.path()),\n537:            \"our own live process, stamped by its own launch, is not a corpse\"\n538:        );\n539:        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n540:    }\n541:\n542:    // [unit->REQ-HAZARD-SHELL-STALE-ONLINE] the whole discriminant matrix. The\n543:    // ONE case that derives offline is a parked, non-zero, dead pid — flynn's\n544:    // field shape: the binary was force-killed, no link broke, so `close_shell`\n545:    // never ran and the record still says `online`. Everything else is"}],"details":{"displayContent":{"text":"/// Read one process generation. Modern PID and birth always come from the same\n/// parsed record; a modern zero never falls back to a stale numeric mirror or\n/// residual birth. Pre-coherent records retain numeric-PID compatibility.\n// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n// [impl->REQ-SHELL-KILL-AUTHENTICATED]\npub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n    let launch = read_shell_launch(shell_perch);\n    if let Some(pid) = launch.as_ref().and_then(|launch| launch.pid) {\n        let birth = if pid == 0 { None } else { launch?.pid_started_at };\n        return Some((pid, birth));\n    }\n    let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n        .ok()?\n        .trim()\n        .parse()\n        .ok()?;\n    Some((pid, launch.and_then(|launch| launch.pid_started_at)))\n}\n\n/// Retire the process identity without resetting its launch age. The coherent\n/// cleared record is mandatory and precedes removal of the compatibility\n/// mirror, so any failed replacement leaves the old evidence untouched.\n// [impl->REQ-SHELL-KILL-AUTHENTICATED]\npub fn clear_shell_pid(shell_perch: &Path) -> std::io::Result<()> {\n    let mut launch = read_shell_launch(shell_perch).unwrap_or_default();\n    launch.pid = Some(0);\n    launch.pid_started_at = None;\n    let json = serde_json::to_string_pretty(&launch)?;\n    atomic_write_string(&shell_perch.join(SHELL_LAUNCH_FILE), &json)?;\n    match std::fs::remove_file(shell_perch.join(SHELL_PID_FILE)) {\n        Err(e) if e.kind() != std::io::ErrorKind::NotFound => Err(e),\n        _ => Ok(()),\n    }\n}\n…\n    // birth stamp does not match what the launch recorded reads GONE.\n    //\n    // THIS IS THE ROW THE SHIPPED PROBE CANNOT PASS, and it is the whole reason the\n    // stamp exists. Bare-pid liveness answers \"is something running under this\n    // number\", which after a reboot is a question about an unrelated process: the\n    // pid namespace reset, some other program took the number, the corpse reads\n    // ALIVE, the derived status reads online, and `relink` then refuses\n    // SHELL_ALREADY_ONLINE on the one instance that needs recovering.\n    //\n    // The fixture uses OUR OWN pid, which is genuinely alive, with a recorded birth\n    // that cannot be ours — so any implementation that consults liveness alone\n    // reports alive here and fails, while the pair test reports gone.\n    #[test]\n    fn a_live_pid_with_a_foreign_birth_stamp_reads_gone() {\n        let d = online_perch(Some(&std::process::id().to_string()));\n        // Sanity: without a stamp this instance reads ALIVE — i.e. the fixture is\n        // not accidentally proving the point through some other absence.\n        assert!(\n            !shell_pid_provably_dead(d.path()),\n            \"no stamp parked ⇒ the pre-existing fail-toward-alive stance holds\"\n        );\n\n        // Now record a launch whose start-time is not this process's.\n        let bogus = ShellLaunch {\n            pid: None,\n            pid_started_at: Some(1),\n            launched_ms: 1_000,\n        };\n        std::fs::write(\n            d.path().join(SHELL_LAUNCH_FILE),\n            serde_json::to_string(&bogus).unwrap(),\n        )\n        .unwrap();\n        assert!(\n            shell_pid_provably_dead(d.path()),\n            \"same pid, different process ⇒ our instance is gone, however alive that \\\n             pid looks\"\n        );\n        assert_eq!(\n            status_of(&d),\n            SHELL_STATUS_OFFLINE,\n            \"and the derived status follows, which is what unblocks relink\"\n        );\n    }\n\n    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE] the paired half: a live pid whose\n    // stamp DOES match is held, so the stamp cannot be satisfied by an\n    // implementation that simply calls every stamped instance dead.\n    #[test]\n    fn a_live_pid_with_its_own_birth_stamp_is_held() {\n        let d = online_perch(Some(&std::process::id().to_string()));\n        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n        let parked = read_shell_launch(d.path()).expect(\"a launch stamp was parked\");\n        assert_eq!(parked.launched_ms, 1_000, \"the absolute stamp round-trips\");\n\n        // On a platform with no start-time oracle the stamp is None and the pair\n        // test cannot fire; the row still must not report a live process dead.\n        assert!(\n            !shell_pid_provably_dead(d.path()),\n            \"our own live process, stamped by its own launch, is not a corpse\"\n        );\n        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n    }\n\n    // [unit->REQ-HAZARD-SHELL-STALE-ONLINE] the whole discriminant matrix. The\n    // ONE case that derives offline is a parked, non-zero, dead pid — flynn's\n    // field shape: the binary was force-killed, no link broke, so `close_shell`\n    // never ran and the record still says `online`. Everything else is","startLine":183,"lineNumbers":[183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,null,478,479,480,481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499,500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517,518,519,520,521,522,523,524,525,526,527,528,529,530,531,532,533,534,535,536,537,538,539,540,541,542,543,544,545]},"fileSize":35419,"meta":{"source":{"type":"path","value":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\shellinfo.rs"}}},"isError":false,"timestamp":1789002274954}}
{"type":"custom","customType":"tool_execution_start","data":{"toolCallId":"call_5o24DvYGloyclqNJ9QysMrhO|ctc_0053347aa1a1a4a3016aa20226dcdc87d1ad5f6767d0ea52c5","toolName":"edit","startedAt":"2026-09-10T01:05:27.116Z"},"id":"a07cc208","parentId":"06e251b3","timestamp":"2026-09-10T01:05:27.116Z"}
{"type":"message","id":"b4d27e24","parentId":"a07cc208","timestamp":"2026-09-10T01:05:27.116Z","message":{"role":"assistant","content":[{"type":"toolCall","id":"call_5o24DvYGloyclqNJ9QysMrhO|ctc_0053347aa1a1a4a3016aa20226dcdc87d1ad5f6767d0ea52c5","name":"edit","arguments":{"input":"*** Begin Patch\n[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#861B]\nPUT 189.=199:\n+    match read_shell_launch(shell_perch) {\n+        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n+            Some((pid, if pid == 0 { None } else { pid_started_at }))\n+        }\n+        legacy => {\n+            let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n+                .ok()?\n+                .trim()\n+                .parse()\n+                .ok()?;\n+            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n+        }\n+    }\nPUT 491.=491:\n+    fn a_legacy_live_pid_with_a_foreign_birth_stamp_reads_gone() {\nPUT >540:\n+\n+    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+    // Publication may leave the numeric mirror from the previous generation.\n+    #[test]\n+    fn modern_identity_ignores_an_old_numeric_pid() {\n+        let d = online_perch(None);\n+        let live = std::process::id();\n+        record_shell_launch(d.path(), live, 1_000).unwrap();\n+        std::fs::write(d.path().join(SHELL_PID_FILE), DEAD_PID.to_string()).unwrap();\n+        assert_eq!(read_shell_pid(d.path()), Some(live));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+\n+        // Nor can an unrelated live numeric mirror rescue a dead modern record.\n+        record_shell_launch(d.path(), DEAD_PID, 2_000).unwrap();\n+        std::fs::write(d.path().join(SHELL_PID_FILE), live.to_string()).unwrap();\n+        assert_eq!(read_shell_pid(d.path()), Some(DEAD_PID));\n+        assert!(shell_pid_provably_dead(d.path()));\n+        assert_eq!(status_of(&d), SHELL_STATUS_OFFLINE);\n+    }\n+\n+    // [unit->REQ-SHELL-KILL-AUTHENTICATED]\n+    // Clear must take custody away even if an old writer restores the mirror.\n+    #[test]\n+    fn modern_clear_does_not_resurrect_a_stale_numeric_pid_or_birth() {\n+        let d = online_perch(None);\n+        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n+        clear_shell_pid(d.path()).unwrap();\n+        std::fs::write(d.path().join(SHELL_PID_FILE), DEAD_PID.to_string()).unwrap();\n+        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+        assert_eq!(read_shell_pid(d.path()), Some(0));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+        let mut cleared = read_shell_launch(d.path()).unwrap();\n+        assert_eq!(cleared.launched_ms, 1_000, \"clear preserves the freeze boundary\");\n+        assert_eq!(cleared.pid_started_at, None);\n+\n+        // A zero PID itself dominates even malformed residual identity evidence.\n+        cleared.pid_started_at = Some(1);\n+        std::fs::write(\n+            d.path().join(SHELL_LAUNCH_FILE),\n+            serde_json::to_string(&cleared).unwrap(),\n+        )\n+        .unwrap();\n+        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+    }\n+\n+    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+    // A directory blocks mandatory JSON replacement without permissions or races.\n+    #[test]\n+    fn failed_publication_and_clear_preserve_legacy_identity() {\n+        let live = std::process::id();\n+        let d = online_perch(Some(&live.to_string()));\n+        std::fs::create_dir(d.path().join(SHELL_LAUNCH_FILE)).unwrap();\n+        assert!(record_shell_launch(d.path(), DEAD_PID, 2_000).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some((live, None)));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert!(clear_shell_pid(d.path()).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some((live, None)));\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+    }\n+\n+    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+    // [unit->REQ-SHELL-KILL-AUTHENTICATED]\n+    // Deny replacement while allowing readers to observe the original JSON.\n+    #[cfg(windows)]\n+    #[test]\n+    fn failed_replacement_preserves_modern_identity_and_birth() {\n+        use std::os::windows::fs::OpenOptionsExt;\n+\n+        let d = online_perch(None);\n+        let live = std::process::id();\n+        record_shell_launch(d.path(), live, 1_000).unwrap();\n+        let original = read_shell_process(d.path()).unwrap();\n+        assert!(original.1.is_some(), \"Windows provides a native birth stamp\");\n+        let held = std::fs::OpenOptions::new()\n+            .read(true)\n+            .share_mode(1) // FILE_SHARE_READ; no FILE_SHARE_DELETE.\n+            .open(d.path().join(SHELL_LAUNCH_FILE))\n+            .unwrap();\n+        assert!(record_shell_launch(d.path(), DEAD_PID, 2_000).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some(original));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert!(clear_shell_pid(d.path()).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some(original));\n+        assert_eq!(\n+            std::fs::read_to_string(d.path().join(SHELL_PID_FILE)).unwrap(),\n+            live.to_string(),\n+            \"failed mandatory replacement must not publish or remove the mirror\"\n+        );\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+        drop(held);\n+    }\n+\n+    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+    // Failure of the compatibility mirror cannot reject an already-published PID.\n+    #[test]\n+    fn modern_publication_survives_an_unwritable_numeric_mirror() {\n+        let d = online_perch(None);\n+        std::fs::create_dir(d.path().join(SHELL_PID_FILE)).unwrap();\n+        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n+        assert_eq!(read_shell_pid(d.path()), Some(std::process::id()));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+\n+        // A failed mirror removal is reported, but cannot restore custody.\n+        assert!(clear_shell_pid(d.path()).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+    }\n*** End Patch\n"},"customWireName":"edit"}],"api":"openai-codex-responses","provider":"openai-codex","model":"gpt-6-astra","usage":{"input":1918,"output":1590,"cacheRead":40960,"cacheWrite":0,"totalTokens":44468,"cost":{"input":0,"output":0,"cacheRead":0,"cacheWrite":0,"total":0}},"stopReason":"toolUse","timestamp":1789002274966,"responseId":"resp_0053347aa1a1a4a3016aa2022336bc87d1b7e1fbb96c4c4f59","providerPayload":{"type":"openaiResponsesHistory","provider":"openai-codex","dt":true,"items":[{"id":"ctc_0053347aa1a1a4a3016aa20226dcdc87d1ad5f6767d0ea52c5","type":"custom_tool_call","status":"completed","call_id":"call_5o24DvYGloyclqNJ9QysMrhO","input":"*** Begin Patch\n[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#861B]\nPUT 189.=199:\n+    match read_shell_launch(shell_perch) {\n+        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n+            Some((pid, if pid == 0 { None } else { pid_started_at }))\n+        }\n+        legacy => {\n+            let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n+                .ok()?\n+                .trim()\n+                .parse()\n+                .ok()?;\n+            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n+        }\n+    }\nPUT 491.=491:\n+    fn a_legacy_live_pid_with_a_foreign_birth_stamp_reads_gone() {\nPUT >540:\n+\n+    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+    // Publication may leave the numeric mirror from the previous generation.\n+    #[test]\n+    fn modern_identity_ignores_an_old_numeric_pid() {\n+        let d = online_perch(None);\n+        let live = std::process::id();\n+        record_shell_launch(d.path(), live, 1_000).unwrap();\n+        std::fs::write(d.path().join(SHELL_PID_FILE), DEAD_PID.to_string()).unwrap();\n+        assert_eq!(read_shell_pid(d.path()), Some(live));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+\n+        // Nor can an unrelated live numeric mirror rescue a dead modern record.\n+        record_shell_launch(d.path(), DEAD_PID, 2_000).unwrap();\n+        std::fs::write(d.path().join(SHELL_PID_FILE), live.to_string()).unwrap();\n+        assert_eq!(read_shell_pid(d.path()), Some(DEAD_PID));\n+        assert!(shell_pid_provably_dead(d.path()));\n+        assert_eq!(status_of(&d), SHELL_STATUS_OFFLINE);\n+    }\n+\n+    // [unit->REQ-SHELL-KILL-AUTHENTICATED]\n+    // Clear must take custody away even if an old writer restores the mirror.\n+    #[test]\n+    fn modern_clear_does_not_resurrect_a_stale_numeric_pid_or_birth() {\n+        let d = online_perch(None);\n+        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n+        clear_shell_pid(d.path()).unwrap();\n+        std::fs::write(d.path().join(SHELL_PID_FILE), DEAD_PID.to_string()).unwrap();\n+        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+        assert_eq!(read_shell_pid(d.path()), Some(0));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+        let mut cleared = read_shell_launch(d.path()).unwrap();\n+        assert_eq!(cleared.launched_ms, 1_000, \"clear preserves the freeze boundary\");\n+        assert_eq!(cleared.pid_started_at, None);\n+\n+        // A zero PID itself dominates even malformed residual identity evidence.\n+        cleared.pid_started_at = Some(1);\n+        std::fs::write(\n+            d.path().join(SHELL_LAUNCH_FILE),\n+            serde_json::to_string(&cleared).unwrap(),\n+        )\n+        .unwrap();\n+        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+    }\n+\n+    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+    // A directory blocks mandatory JSON replacement without permissions or races.\n+    #[test]\n+    fn failed_publication_and_clear_preserve_legacy_identity() {\n+        let live = std::process::id();\n+        let d = online_perch(Some(&live.to_string()));\n+        std::fs::create_dir(d.path().join(SHELL_LAUNCH_FILE)).unwrap();\n+        assert!(record_shell_launch(d.path(), DEAD_PID, 2_000).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some((live, None)));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert!(clear_shell_pid(d.path()).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some((live, None)));\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+    }\n+\n+    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+    // [unit->REQ-SHELL-KILL-AUTHENTICATED]\n+    // Deny replacement while allowing readers to observe the original JSON.\n+    #[cfg(windows)]\n+    #[test]\n+    fn failed_replacement_preserves_modern_identity_and_birth() {\n+        use std::os::windows::fs::OpenOptionsExt;\n+\n+        let d = online_perch(None);\n+        let live = std::process::id();\n+        record_shell_launch(d.path(), live, 1_000).unwrap();\n+        let original = read_shell_process(d.path()).unwrap();\n+        assert!(original.1.is_some(), \"Windows provides a native birth stamp\");\n+        let held = std::fs::OpenOptions::new()\n+            .read(true)\n+            .share_mode(1) // FILE_SHARE_READ; no FILE_SHARE_DELETE.\n+            .open(d.path().join(SHELL_LAUNCH_FILE))\n+            .unwrap();\n+        assert!(record_shell_launch(d.path(), DEAD_PID, 2_000).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some(original));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert!(clear_shell_pid(d.path()).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some(original));\n+        assert_eq!(\n+            std::fs::read_to_string(d.path().join(SHELL_PID_FILE)).unwrap(),\n+            live.to_string(),\n+            \"failed mandatory replacement must not publish or remove the mirror\"\n+        );\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+        drop(held);\n+    }\n+\n+    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+    // Failure of the compatibility mirror cannot reject an already-published PID.\n+    #[test]\n+    fn modern_publication_survives_an_unwritable_numeric_mirror() {\n+        let d = online_perch(None);\n+        std::fs::create_dir(d.path().join(SHELL_PID_FILE)).unwrap();\n+        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n+        assert_eq!(read_shell_pid(d.path()), Some(std::process::id()));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+\n+        // A failed mirror removal is reported, but cannot restore custody.\n+        assert!(clear_shell_pid(d.path()).is_err());\n+        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+        assert!(!shell_pid_provably_dead(d.path()));\n+    }\n*** End Patch\n","internal_chat_message_metadata_passthrough":{"create_time":1789002276.115968,"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"},"name":"edit","metadata":{"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"}}]},"duration":52116.19909999985,"ttft":3926.651599999517,"completedAt":1789002327115,"contextSnapshot":{"promptTokens":42878,"nonMessageTokens":17013,"compactionEpoch":0}}}
{"type":"message","id":"c9762665","parentId":"b4d27e24","timestamp":"2026-09-10T01:05:27.195Z","message":{"role":"toolResult","toolCallId":"call_5o24DvYGloyclqNJ9QysMrhO|ctc_0053347aa1a1a4a3016aa20226dcdc87d1ad5f6767d0ea52c5","toolName":"edit","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#C9B9]\n187:// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n188:pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n189:    match read_shell_launch(shell_perch) {\n190:        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n…\n199:            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n200:        }\n201:    }\n202:}\n203:\n491:    // reports alive here and fails, while the pair test reports gone.\n492:    #[test]\n493:    fn a_legacy_live_pid_with_a_foreign_birth_stamp_reads_gone() {\n494:        let d = online_perch(Some(&std::process::id().to_string()));\n495:        // Sanity: without a stamp this instance reads ALIVE — i.e. the fixture is\n\n523:    }\n\n529:    fn a_live_pid_with_its_own_birth_stamp_is_held() {\n\n542:    }\n543:\n544:    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n545:    // Publication may leave the numeric mirror from the previous generation.\n…\n653:    }\n654:\n655:    // [unit->REQ-HAZARD-SHELL-STALE-ONLINE] the whole discriminant matrix. The\n656:    // ONE case that derives offline is a parked, non-zero, dead pid — flynn's"}],"details":{"diff":" 187|// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n 188|pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n-189|    let launch = read_shell_launch(shell_perch);\n-190|    if let Some(pid) = launch.as_ref().and_then(|launch| launch.pid) {\n-191|        let birth = if pid == 0 { None } else { launch?.pid_started_at };\n-192|        return Some((pid, birth));\n+189|    match read_shell_launch(shell_perch) {\n+190|        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n+191|            Some((pid, if pid == 0 { None } else { pid_started_at }))\n+192|        }\n+193|        legacy => {\n+194|            let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n+195|                .ok()?\n+196|                .trim()\n+197|                .parse()\n+198|                .ok()?;\n+199|            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n+200|        }\n 193|    }\n-194|    let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n-195|        .ok()?\n-196|        .trim()\n-197|        .parse()\n-198|        .ok()?;\n-199|    Some((pid, launch.and_then(|launch| launch.pid_started_at)))\n 200|}\n 201|\n 489|    // reports alive here and fails, while the pair test reports gone.\n 490|    #[test]\n-491|    fn a_live_pid_with_a_foreign_birth_stamp_reads_gone() {\n+493|    fn a_legacy_live_pid_with_a_foreign_birth_stamp_reads_gone() {\n 492|        let d = online_perch(Some(&std::process::id().to_string()));\n 493|        // Sanity: without a stamp this instance reads ALIVE — i.e. the fixture is\n\n 521|    }\n\n 527|    fn a_live_pid_with_its_own_birth_stamp_is_held() {\n\n 540|    }\n 541|\n+544|    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+545|    // Publication may leave the numeric mirror from the previous generation.\n+546|    #[test]\n+547|    fn modern_identity_ignores_an_old_numeric_pid() {\n+548|        let d = online_perch(None);\n+549|        let live = std::process::id();\n+550|        record_shell_launch(d.path(), live, 1_000).unwrap();\n+551|        std::fs::write(d.path().join(SHELL_PID_FILE), DEAD_PID.to_string()).unwrap();\n+552|        assert_eq!(read_shell_pid(d.path()), Some(live));\n+553|        assert!(!shell_pid_provably_dead(d.path()));\n+554|        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+555|\n+556|        // Nor can an unrelated live numeric mirror rescue a dead modern record.\n+557|        record_shell_launch(d.path(), DEAD_PID, 2_000).unwrap();\n+558|        std::fs::write(d.path().join(SHELL_PID_FILE), live.to_string()).unwrap();\n+559|        assert_eq!(read_shell_pid(d.path()), Some(DEAD_PID));\n+560|        assert!(shell_pid_provably_dead(d.path()));\n+561|        assert_eq!(status_of(&d), SHELL_STATUS_OFFLINE);\n+562|    }\n+563|\n+564|    // [unit->REQ-SHELL-KILL-AUTHENTICATED]\n+565|    // Clear must take custody away even if an old writer restores the mirror.\n+566|    #[test]\n+567|    fn modern_clear_does_not_resurrect_a_stale_numeric_pid_or_birth() {\n+568|        let d = online_perch(None);\n+569|        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n+570|        clear_shell_pid(d.path()).unwrap();\n+571|        std::fs::write(d.path().join(SHELL_PID_FILE), DEAD_PID.to_string()).unwrap();\n+572|        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+573|        assert_eq!(read_shell_pid(d.path()), Some(0));\n+574|        assert!(!shell_pid_provably_dead(d.path()));\n+575|        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+576|        let mut cleared = read_shell_launch(d.path()).unwrap();\n+577|        assert_eq!(cleared.launched_ms, 1_000, \"clear preserves the freeze boundary\");\n+578|        assert_eq!(cleared.pid_started_at, None);\n+579|\n+580|        // A zero PID itself dominates even malformed residual identity evidence.\n+581|        cleared.pid_started_at = Some(1);\n+582|        std::fs::write(\n+583|            d.path().join(SHELL_LAUNCH_FILE),\n+584|            serde_json::to_string(&cleared).unwrap(),\n+585|        )\n+586|        .unwrap();\n+587|        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+588|        assert!(!shell_pid_provably_dead(d.path()));\n+589|    }\n+590|\n+591|    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+592|    // A directory blocks mandatory JSON replacement without permissions or races.\n+593|    #[test]\n+594|    fn failed_publication_and_clear_preserve_legacy_identity() {\n+595|        let live = std::process::id();\n+596|        let d = online_perch(Some(&live.to_string()));\n+597|        std::fs::create_dir(d.path().join(SHELL_LAUNCH_FILE)).unwrap();\n+598|        assert!(record_shell_launch(d.path(), DEAD_PID, 2_000).is_err());\n+599|        assert_eq!(read_shell_process(d.path()), Some((live, None)));\n+600|        assert!(!shell_pid_provably_dead(d.path()));\n+601|        assert!(clear_shell_pid(d.path()).is_err());\n+602|        assert_eq!(read_shell_process(d.path()), Some((live, None)));\n+603|        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+604|    }\n+605|\n+606|    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+607|    // [unit->REQ-SHELL-KILL-AUTHENTICATED]\n+608|    // Deny replacement while allowing readers to observe the original JSON.\n+609|    #[cfg(windows)]\n+610|    #[test]\n+611|    fn failed_replacement_preserves_modern_identity_and_birth() {\n+612|        use std::os::windows::fs::OpenOptionsExt;\n+613|\n+614|        let d = online_perch(None);\n+615|        let live = std::process::id();\n+616|        record_shell_launch(d.path(), live, 1_000).unwrap();\n+617|        let original = read_shell_process(d.path()).unwrap();\n+618|        assert!(original.1.is_some(), \"Windows provides a native birth stamp\");\n+619|        let held = std::fs::OpenOptions::new()\n+620|            .read(true)\n+621|            .share_mode(1) // FILE_SHARE_READ; no FILE_SHARE_DELETE.\n+622|            .open(d.path().join(SHELL_LAUNCH_FILE))\n+623|            .unwrap();\n+624|        assert!(record_shell_launch(d.path(), DEAD_PID, 2_000).is_err());\n+625|        assert_eq!(read_shell_process(d.path()), Some(original));\n+626|        assert!(!shell_pid_provably_dead(d.path()));\n+627|        assert!(clear_shell_pid(d.path()).is_err());\n+628|        assert_eq!(read_shell_process(d.path()), Some(original));\n+629|        assert_eq!(\n+630|            std::fs::read_to_string(d.path().join(SHELL_PID_FILE)).unwrap(),\n+631|            live.to_string(),\n+632|            \"failed mandatory replacement must not publish or remove the mirror\"\n+633|        );\n+634|        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+635|        drop(held);\n+636|    }\n+637|\n+638|    // [unit->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n+639|    // Failure of the compatibility mirror cannot reject an already-published PID.\n+640|    #[test]\n+641|    fn modern_publication_survives_an_unwritable_numeric_mirror() {\n+642|        let d = online_perch(None);\n+643|        std::fs::create_dir(d.path().join(SHELL_PID_FILE)).unwrap();\n+644|        record_shell_launch(d.path(), std::process::id(), 1_000).unwrap();\n+645|        assert_eq!(read_shell_pid(d.path()), Some(std::process::id()));\n+646|        assert!(!shell_pid_provably_dead(d.path()));\n+647|        assert_eq!(status_of(&d), SHELL_STATUS_ONLINE);\n+648|\n+649|        // A failed mirror removal is reported, but cannot restore custody.\n+650|        assert!(clear_shell_pid(d.path()).is_err());\n+651|        assert_eq!(read_shell_process(d.path()), Some((0, None)));\n+652|        assert!(!shell_pid_provably_dead(d.path()));\n+653|    }\n+654|\n 542|    // [unit->REQ-HAZARD-SHELL-STALE-ONLINE] the whole discriminant matrix. The\n 543|    // ONE case that derives offline is a parked, non-zero, dead pid — flynn's","firstChangedLine":189,"op":"update","path":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\shellinfo.rs","snapshotsPruned":true},"isError":false,"timestamp":1789002327194}}
{"type":"custom","customType":"tool_execution_start","data":{"toolCallId":"call_LYZ6LZBolOVf0l8TjA0XlhFQ|fc_0053347aa1a1a4a3016aa20265501887d18f45d1eea460dd33","toolName":"hub","startedAt":"2026-09-10T01:05:44.285Z","intent":"Flagging legacy migration ordering"},"id":"e9b93157","parentId":"c9762665","timestamp":"2026-09-10T01:05:44.285Z"}
{"type":"message","id":"a4ee0b92","parentId":"e9b93157","timestamp":"2026-09-10T01:05:44.286Z","message":{"role":"assistant","content":[{"type":"thinking","thinking":"**Preserving legacy birth fallback**\n\n**Designing coherent legacy reads**\n\n**Clarifying modern record reads**"},{"type":"toolCall","id":"call_LYZ6LZBolOVf0l8TjA0XlhFQ|fc_0053347aa1a1a4a3016aa20265501887d18f45d1eea460dd33","name":"hub","arguments":{"i":"Flagging legacy migration ordering","op":"send","to":"Main","message":"Store implementation/tests landed in shellinfo.rs; no validation run. One subtlety: reading JSON then falling back to numeric for legacy can straddle first modern publication (legacy JSON + new numeric). I am changing read_shell_process to snapshot numeric bytes first, then parse JSON once; modern always overrides mirror, and JSON-first writer ordering protects legacy→modern transition. Slight extra compatibility-file read per modern read, no new lock/retry."},"intent":"Flagging legacy migration 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One subtlety: reading JSON then falling back to numeric for legacy can straddle first modern publication (legacy JSON + new numeric). I am changing read_shell_process to snapshot numeric bytes first, then parse JSON once; modern always overrides mirror, and JSON-first writer ordering protects legacy→modern transition. Slight extra compatibility-file read per modern read, no new lock/retry.\"}","call_id":"call_LYZ6LZBolOVf0l8TjA0XlhFQ","internal_chat_message_metadata_passthrough":{"create_time":1789002327.754934,"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"},"name":"hub","metadata":{"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"}}]},"duration":17039.069500000216,"ttft":1398.9846000000834,"completedAt":1789002344285,"contextSnapshot":{"promptTokens":44815,"nonMessageTokens":17013,"compactionEpoch":0}}}
{"type":"message","id":"913e1ae0","parentId":"a4ee0b92","timestamp":"2026-09-10T01:05:44.287Z","message":{"role":"toolResult","toolCallId":"call_LYZ6LZBolOVf0l8TjA0XlhFQ|fc_0053347aa1a1a4a3016aa20265501887d18f45d1eea460dd33","toolName":"hub","content":[{"type":"text","text":"Delivered to 1 peer(s):\n- Main: injected"}],"details":{"op":"send","from":"ShellIdentityStore","to":"Main","receipts":[{"to":"Main","outcome":"injected"}]},"isError":false,"timestamp":1789002344286}}
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{"type":"message","id":"8a9732dd","parentId":"f077bd06","timestamp":"2026-09-10T01:05:54.071Z","message":{"role":"assistant","content":[{"type":"thinking","thinking":"**Choosing PID read order**"},{"type":"toolCall","id":"call_p3uHqXwVVVCHUXxKqWpOX5Oh|ctc_0053347aa1a1a4a3016aa20270855c87d194461365d8b4d525","name":"edit","arguments":{"input":"*** Begin Patch\n[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#C9B9]\nPUT >188:\n+    // Snapshot the legacy mirror first: publication replaces JSON before the\n+    // mirror, so the first modern launch cannot pair a new numeric PID with a\n+    // legacy birth read before that publication.\n+    let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\nPUT 194.=198:\n+            let pid = legacy_pid.ok()?.trim().parse().ok()?;\n*** End Patch\n"},"customWireName":"edit"}],"api":"openai-codex-responses","provider":"openai-codex","model":"gpt-6-astra","usage":{"input":659,"output":257,"cacheRead":44672,"cacheWrite":0,"totalTokens":45588,"reasoningTokens":121,"cost":{"input":0,"output":0,"cacheRead":0,"cacheWrite":0,"total":0}},"stopReason":"toolUse","timestamp":1789002344339,"responseId":"resp_0053347aa1a1a4a3016aa20268ee2c87d19ac406e41cf814e9","providerPayload":{"type":"openaiResponsesHistory","provider":"openai-codex","dt":true,"items":[{"id":"rs_0053347aa1a1a4a3016aa2026a409887d1b36cdd032a12afc4","type":"reasoning","content":[],"encrypted_content":"gAAAAABqogJwPzbGPH2VBHQ1WJWErqD7Ca_eTar3v6mLiJ1_2J9NbUioF9PpUfIiyFGhsK66x7gQWJqaANFC6sCKOT0bIPK_1aCbdoXiqaNWP-FMK3l7PkVWC_2lW098lYFbkN8m06Lve1adukWBlBXRfBouzhqYaExsWmtRkLPpzoS8UIYs0hbR3Zok6wl6F036IlKL_K461fDiQ9ZbcqhxJE8qdlQ_nk1jrBvZcT-U1xkqR0c6687aQx31iawg-dtgZ8IukYMrsHHxOMXSpgxvl1rtm6IqKGMpYFjRty2qAeUs9MwslMlRQesAUN3l0au-kvRaJLLQV8MMmZgr1fskLcBv2b_VSd8BKRi8qiKVc5cXZ2ZppU7cFXoFxS7XiC9FT1WYULBPoKzoAAwgrTcHmq0mjFic64d_tIVt8eYnfaC7XJ5dqhUU8JbQiky0eHyquu50oSIgjpS30hJrZdr1yY5kmj1tSCN4whPB9X6CE5YInnAFn34-SDxmu1IZ5k2jdTlsbfZk0WcKkhYJKNomjz9rk7D9VQSqLuf3zB7vsy8Pv43nxMgMdZ3MzrWlZeZ9kZX9XViZd7uO3UsbKedCwzm3uhOpPTHJgGPLVYv09dW8dtXnLOtT_rzWDrbPxZ3zbT_EyTfR9f2Wu75pAcFXvksLJ9rkg-69iGbwCSi3j2R7zhohjChTIT3fwS_YLkfAo6iMRWPyurKld-MM61s_6ewPqRf2csWlbh32LUivPPxIkpMUxYpdCEFAgzegG8tf0eu7MROiROg57oDB653EBMRVAk1qd5aYMCwmcKvrVVrez1cudNODWOCZplSYsaX-IhjzjrQfhIoyJiBoFNQCrWIK6MBNzQrAbqUX8T84U2Qobw9zLh-hxIbvqYoq2AUflQnCdjGBw4RwlLRU1aQViMKHhEF__6-Oi76vuv1Q0GwqEUBFKDvU4UxyyeMRxT7YdRhoXR2NQf1kP-InDsHAvfxztzhECSvtkpTBvEtR5HnfVTIVbKywkgS95fzgzLUPfEgy3fVbzj4aJazPpiivFv59B_VCGrgjZUIqYHpn7oJd_v3izamBMzHrjOzVTPGZxSyWFRXhfSMMgF6ULLHjeQeCI1E9qhSpOj-blluSFRCILydYMDgEPpkQ3HYrKswCQJkkJyYp2t4Tds4MEnf7PR145YnelB6H4xpjEAwVyZVe91Y6YilR0TTJPNsxH9AHwklge2AcXZ5FEVbC6kMswCw371EAHfrSoCVNmbtYGubEl0A2fJHmjdzcdLHAv7zNZz3Bnzy80lTYmioFA25qFMoD6tkl0dWsUzt1CW1CZVrDB-sHcJchVlkz0gdMmxLucLRSdBSQsYVqgKP5GcUKOpFWyqLM-tDNOvdTRXeK-nCvPe4ObWx2vXgsxQqReHwDKcVEaC166ARGqT3DHDAO8cK2yikx6i_ugeze5lEZwRCGKmCiCE-tR-lMuROMq71aooJ6isZI-00nnAGYmAOu3EABQZu_DQD1h67tqZP9O_XK69Yz1JWPnP_1_KVZUUPMko7v8aTyCc8XsLV2CbtVgpXF858G_3KODoSr49wbEXkk5RHmRN0Q3p03dA2ek_ZtKOhp8ZXu4ph56Fnr4rRvtm5iJKb4ry0hDS4Rp6dCHFqKkP46-aB0R4ZEb152a8-cvnuG9gTGweEF2eExHsEarHIXCQmNJqHdp_fUBCsxMoVPN31yHr7Z-3enhcdAf5f4gICR10Sz8eGxcCYq3iaReKiP8WxbmfnYHUIJ5c6LM3_8DicYZX3O0wB1uG3_i5V7QJcw9V4W6iKzF0JNV0itWX09BRlWUweETiuvMTtTMHnd2jEmqf2MavFsMlcSLZy77fHzp-lT9zq215owk-xHaNZ_e53wQ8gwmnYbmYaNKklHmFTjI74jYvEDN7p0oI7rv_q2dcjSwBgG4I5aDkPyy4y8ayYomEB70Blh8XWmnQuaLtphJBZS10NnneWC2-pTpaTR0icdJjtfyWEejXOUY8g4sytiZ-Y_RzjGP8vQFTEYHaFOsj7IxZ9ijrbBr7Zb6U8BWOhQozgu4W_eiISeedWZuPDYUdqKnJCiX_guV6REW2piHDtWSGJvQsvYf6NKbDPF3d63","internal_chat_message_metadata_passthrough":{"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"},"summary":[{"type":"summary_text","text":"**Choosing PID read order**"}],"metadata":{"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"}},{"id":"ctc_0053347aa1a1a4a3016aa20270855c87d194461365d8b4d525","type":"custom_tool_call","status":"completed","call_id":"call_p3uHqXwVVVCHUXxKqWpOX5Oh","input":"*** Begin Patch\n[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#C9B9]\nPUT >188:\n+    // Snapshot the legacy mirror first: publication replaces JSON before the\n+    // mirror, so the first modern launch cannot pair a new numeric PID with a\n+    // legacy birth read before that publication.\n+    let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\nPUT 194.=198:\n+            let pid = legacy_pid.ok()?.trim().parse().ok()?;\n*** End Patch\n","internal_chat_message_metadata_passthrough":{"create_time":1789002345.434646,"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"},"name":"edit","metadata":{"turn_id":"2a1a5a8d-9a34-46f0-9fc7-438789a27635"}}]},"duration":9729.43740000017,"ttft":1967.5426000002772,"completedAt":1789002354070,"contextSnapshot":{"promptTokens":45331,"nonMessageTokens":17013,"compactionEpoch":0}}}
{"type":"message","id":"93ce1c00","parentId":"8a9732dd","timestamp":"2026-09-10T01:05:54.116Z","message":{"role":"toolResult","toolCallId":"call_p3uHqXwVVVCHUXxKqWpOX5Oh|ctc_0053347aa1a1a4a3016aa20270855c87d194461365d8b4d525","toolName":"edit","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#E913]\n187:// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n188:pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n189:    // Snapshot the legacy mirror first: publication replaces JSON before the\n190:    // mirror, so the first modern launch cannot pair a new numeric PID with a\n191:    // legacy birth read before that publication.\n192:    let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\n193:    match read_shell_launch(shell_perch) {\n194:        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n196:        }\n197:        legacy => {\n198:            let pid = legacy_pid.ok()?.trim().parse().ok()?;\n199:            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n200:        }\n201:    }\n202:}"}],"details":{"diff":" 187|// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n 188|pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n+189|    // Snapshot the legacy mirror first: publication replaces JSON before the\n+190|    // mirror, so the first modern launch cannot pair a new numeric PID with a\n+191|    // legacy birth read before that publication.\n+192|    let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\n 189|    match read_shell_launch(shell_perch) {\n 190|        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n 192|        }\n 193|        legacy => {\n-194|            let pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE))\n-195|                .ok()?\n-196|                .trim()\n-197|                .parse()\n-198|                .ok()?;\n+198|            let pid = legacy_pid.ok()?.trim().parse().ok()?;\n 199|            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n 200|        }\n 201|    }\n 202|}","firstChangedLine":188,"op":"update","path":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\shellinfo.rs","snapshotsPruned":true},"isError":false,"timestamp":1789002354115}}
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{"type":"message","id":"cb71aabb","parentId":"d9fc3104","timestamp":"2026-09-10T01:06:17.223Z","message":{"role":"assistant","content":[{"type":"thinking","thinking":"**Checking legacy test compatibility**\n\n**Adding modern reuse test**"},{"type":"toolCall","id":"call_R8BGH8hDuPvsKDh0CSgIpnco|fc_0053347aa1a1a4a3016aa2027f0ea487d19154d8bfe2d95da0","name":"yield","arguments":{"data":{"file":".worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs","changed_symbols":["ShellLaunch: optional serde-compatible pid field; Some(0) means explicitly pidless","record_shell_launch: mandatory atomic JSON identity publication returning io::Result, followed by best-effort numeric mirror","read_shell_process: single parsed JSON snapshot; numeric snapshot precedes JSON read to protect legacy-to-modern publication ordering","read_shell_pid: delegates to coherent process reader","clear_shell_pid: mandatory zero-PID/no-birth JSON preserving launch age, then numeric mirror removal","shell_pid_provably_dead: consumes one coherent PID/birth tuple"],"tests_for_main":["modern_identity_ignores_an_old_numeric_pid","modern_clear_does_not_resurrect_a_stale_numeric_pid_or_birth","failed_publication_and_clear_preserve_legacy_identity","failed_replacement_preserves_modern_identity_and_birth (Windows only; held file denies replacement)","modern_publication_survives_an_unwritable_numeric_mirror","a_legacy_live_pid_with_a_foreign_birth_stamp_reads_gone (renamed existing legacy mismatch test)","a_live_pid_with_its_own_birth_stamp_is_held (updated Result handling)"],"limitations":["No builds, tests, formatting, or validation commands run, as assigned; Main must execute regressions.","LSP unavailable: xd://lsp reported no such mounted tool; complete repository grep used before exported changes.","Legacy records remain two-file compatibility records; older writers do not acquire modern coherence guarantees.","Numeric mirror failure is intentionally best-effort for publication. 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Some(0) means explicitly pidless\",\"record_shell_launch: mandatory atomic JSON identity publication returning io::Result, followed by best-effort numeric mirror\",\"read_shell_process: single parsed JSON snapshot; numeric snapshot precedes JSON read to protect legacy-to-modern publication ordering\",\"read_shell_pid: delegates to coherent process reader\",\"clear_shell_pid: mandatory zero-PID/no-birth JSON preserving launch age, then numeric mirror removal\",\"shell_pid_provably_dead: consumes one coherent PID/birth tuple\"],\"tests_for_main\":[\"modern_identity_ignores_an_old_numeric_pid\",\"modern_clear_does_not_resurrect_a_stale_numeric_pid_or_birth\",\"failed_publication_and_clear_preserve_legacy_identity\",\"failed_replacement_preserves_modern_identity_and_birth (Windows only; held file denies replacement)\",\"modern_publication_survives_an_unwritable_numeric_mirror\",\"a_legacy_live_pid_with_a_foreign_birth_stamp_reads_gone (renamed existing legacy mismatch test)\",\"a_live_pid_with_its_own_birth_stamp_is_held (updated Result handling)\"],\"limitations\":[\"No builds, tests, formatting, or validation commands run, as assigned; 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{"type":"message","id":"9fb8a8bb","parentId":"cb71aabb","timestamp":"2026-09-10T01:06:17.225Z","message":{"role":"toolResult","toolCallId":"call_R8BGH8hDuPvsKDh0CSgIpnco|fc_0053347aa1a1a4a3016aa2027f0ea487d19154d8bfe2d95da0","toolName":"yield","content":[{"type":"text","text":"Result submitted."}],"details":{"data":{"file":".worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs","changed_symbols":["ShellLaunch: optional serde-compatible pid field; Some(0) means explicitly pidless","record_shell_launch: mandatory atomic JSON identity publication returning io::Result, followed by best-effort numeric mirror","read_shell_process: single parsed JSON snapshot; numeric snapshot precedes JSON read to protect legacy-to-modern publication ordering","read_shell_pid: delegates to coherent process reader","clear_shell_pid: mandatory zero-PID/no-birth JSON preserving launch age, then numeric mirror removal","shell_pid_provably_dead: consumes one coherent PID/birth tuple"],"tests_for_main":["modern_identity_ignores_an_old_numeric_pid","modern_clear_does_not_resurrect_a_stale_numeric_pid_or_birth","failed_publication_and_clear_preserve_legacy_identity","failed_replacement_preserves_modern_identity_and_birth (Windows only; held file denies replacement)","modern_publication_survives_an_unwritable_numeric_mirror","a_legacy_live_pid_with_a_foreign_birth_stamp_reads_gone (renamed existing legacy mismatch test)","a_live_pid_with_its_own_birth_stamp_is_held (updated Result handling)"],"limitations":["No builds, tests, formatting, or validation commands run, as assigned; Main must execute regressions.","LSP unavailable: xd://lsp reported no such mounted tool; complete repository grep used before exported changes.","Legacy records remain two-file compatibility records; older writers do not acquire modern coherence guarantees.","Numeric mirror failure is intentionally best-effort for publication. Clear returns removal errors after safely publishing the cleared modern record.","Only assigned file edited; no commits."]},"status":"success"},"isError":false,"timestamp":1789002377224}}
{"type":"custom_message","customType":"irc:incoming","content":"<irc>\nIncoming IRC message from agent `Main`:\n\nRead implementation. Please avoid reading numeric mirror for every modern record: modern fast path can read JSON once and return its coherent pair; only legacy fallback snapshots numeric and then re-reads JSON to detect an intervening modern publication before pairing legacy birth. This preserves transition correctness while keeping common modern reads one file. Keep own file only, no validation while caller sibling edits.\nIf response expected, reply via `hub` (`op: \"send\"`, `to: \"Main\"`) when available; otherwise what you `yield` or say last this turn is delivered to `Main` when you stop.\n</irc>","display":true,"details":{"id":"157983efad7ffeff","from":"Main","message":"Read implementation. Please avoid reading numeric mirror for every modern record: modern fast path can read JSON once and return its coherent pair; only legacy fallback snapshots numeric and then re-reads JSON to detect an intervening modern publication before pairing legacy birth. This preserves transition correctness while keeping common modern reads one file. Keep own file only, no validation while caller sibling edits."},"attribution":"agent","id":"c99c1a66","parentId":"9fb8a8bb","timestamp":"2026-09-10T01:06:51.701Z"}
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{"type":"message","id":"12754c0b","parentId":"3624ea26","timestamp":"2026-09-10T01:07:03.041Z","message":{"role":"toolResult","toolCallId":"call_HB3JzLs2gG3jDzMBIXR0H7vN|fc_0053347aa1a1a4a3016aa202b645a887d1a3d29fb8a688992d","toolName":"read","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#E913]\n182:\n183:/// Read one process generation. Modern PID and birth always come from the same\n184:/// parsed record; a modern zero never falls back to a stale numeric mirror or\n185:/// residual birth. Pre-coherent records retain numeric-PID compatibility.\n186:// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\n187:// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n188:pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n189:    // Snapshot the legacy mirror first: publication replaces JSON before the\n190:    // mirror, so the first modern launch cannot pair a new numeric PID with a\n191:    // legacy birth read before that publication.\n192:    let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\n193:    match read_shell_launch(shell_perch) {\n194:        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n195:            Some((pid, if pid == 0 { None } else { pid_started_at }))\n196:        }\n197:        legacy => {\n198:            let pid = legacy_pid.ok()?.trim().parse().ok()?;\n199:            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n200:        }\n201:    }\n202:}\n203:\n204:/// Retire the process identity without resetting its launch age. The coherent\n205:/// cleared record is mandatory and precedes removal of the compatibility\n206:/// mirror, so any failed replacement leaves the old evidence untouched.\n\n[Showing lines 182-206 of 874. Use :207 to continue]"}],"details":{"truncation":{"content":"\r\n/// Read one process generation. Modern PID and birth always come from the same\r\n/// parsed record; a modern zero never falls back to a stale numeric mirror or\r\n/// residual birth. Pre-coherent records retain numeric-PID compatibility.\r\n// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\r\n// [impl->REQ-SHELL-KILL-AUTHENTICATED]\r\npub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\r\n    // Snapshot the legacy mirror first: publication replaces JSON before the\r\n    // mirror, so the first modern launch cannot pair a new numeric PID with a\r\n    // legacy birth read before that publication.\r\n    let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\r\n    match read_shell_launch(shell_perch) {\r\n        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\r\n            Some((pid, if pid == 0 { None } else { pid_started_at }))\r\n        }\r\n        legacy => {\r\n            let pid = legacy_pid.ok()?.trim().parse().ok()?;\r\n            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\r\n        }\r\n    }\r\n}\r\n\r\n/// Retire the process identity without resetting its launch age. The coherent\r\n/// cleared record is mandatory and precedes removal of the compatibility\r\n/// mirror, so any failed replacement leaves the old evidence untouched.\r","truncated":true,"truncatedBy":"lines","totalLines":693,"totalBytes":1301,"outputLines":25,"outputBytes":1301,"lastLinePartial":false,"firstLineExceedsLimit":false},"totalLines":874,"displayContent":{"text":"\r\n/// Read one process generation. Modern PID and birth always come from the same\r\n/// parsed record; a modern zero never falls back to a stale numeric mirror or\r\n/// residual birth. Pre-coherent records retain numeric-PID compatibility.\r\n// [impl->REQ-SHELL-PERSISTENT-BOOT-RESTORE]\r\n// [impl->REQ-SHELL-KILL-AUTHENTICATED]\r\npub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\r\n    // Snapshot the legacy mirror first: publication replaces JSON before the\r\n    // mirror, so the first modern launch cannot pair a new numeric PID with a\r\n    // legacy birth read before that publication.\r\n    let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\r\n    match read_shell_launch(shell_perch) {\r\n        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\r\n            Some((pid, if pid == 0 { None } else { pid_started_at }))\r\n        }\r\n        legacy => {\r\n            let pid = legacy_pid.ok()?.trim().parse().ok()?;\r\n            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\r\n        }\r\n    }\r\n}\r\n\r\n/// Retire the process identity without resetting its launch age. The coherent\r\n/// cleared record is mandatory and precedes removal of the compatibility\r\n/// mirror, so any failed replacement leaves the old evidence untouched.\r","startLine":182,"lineNumbers":[182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206]},"fileSize":41041,"meta":{"source":{"type":"path","value":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\shellinfo.rs"},"truncation":{"direction":"head","truncatedBy":"lines","totalLines":874,"totalBytes":1301,"outputLines":25,"outputBytes":1301,"shownRange":{"start":182,"end":206},"nextOffset":207}}},"isError":false,"timestamp":1789002423041}}
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{"type":"message","id":"f6c22204","parentId":"080a5d4d","timestamp":"2026-09-10T01:07:11.228Z","message":{"role":"toolResult","toolCallId":"call_NavnrIXFuDAAavXRXWKNFpvq|ctc_0053347aa1a1a4a3016aa202b89bbc87d1a6cb384421d1bdf3","toolName":"edit","content":[{"type":"text","text":"[.worktrees/287-shellrestore/crates/spt-store/src/shellinfo.rs#151A]\n187:// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n188:pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n189:    match read_shell_launch(shell_perch) {\n190:        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n191:            Some((pid, if pid == 0 { None } else { pid_started_at }))\n192:        }\n193:        _ => {\n194:            let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\n…\n205:                }\n206:            }\n207:        }\n208:    }\n209:}"}],"details":{"diff":" 187|// [impl->REQ-SHELL-KILL-AUTHENTICATED]\n 188|pub fn read_shell_process(shell_perch: &Path) -> Option<(u32, Option<u64>)> {\n-189|    // Snapshot the legacy mirror first: publication replaces JSON before the\n-190|    // mirror, so the first modern launch cannot pair a new numeric PID with a\n-191|    // legacy birth read before that publication.\n-192|    let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\n 193|    match read_shell_launch(shell_perch) {\n 194|        Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n 195|            Some((pid, if pid == 0 { None } else { pid_started_at }))\n 196|        }\n-197|        legacy => {\n-198|            let pid = legacy_pid.ok()?.trim().parse().ok()?;\n-199|            Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n+193|        _ => {\n+194|            let legacy_pid = std::fs::read_to_string(shell_perch.join(SHELL_PID_FILE));\n+195|            // Only legacy readers need a second JSON read. Publication replaces\n+196|            // JSON before the numeric mirror, so recheck after the mirror\n+197|            // snapshot to catch the first modern launch without mixing births.\n+198|            match read_shell_launch(shell_perch) {\n+199|                Some(ShellLaunch { pid: Some(pid), pid_started_at, .. }) => {\n+200|                    Some((pid, if pid == 0 { None } else { pid_started_at }))\n+201|                }\n+202|                legacy => {\n+203|                    let pid = legacy_pid.ok()?.trim().parse().ok()?;\n+204|                    Some((pid, legacy.and_then(|launch| launch.pid_started_at)))\n+205|                }\n+206|            }\n 200|        }\n 201|    }\n 202|}","firstChangedLine":189,"op":"update","path":"C:\\Users\\decid\\Documents\\projects\\spt-core\\.worktrees\\287-shellrestore\\crates\\spt-store\\src\\shellinfo.rs","snapshotsPruned":true},"isError":false,"timestamp":1789002431228}}
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