---
phase: 20.5-modal-state-architectural-audit-inserted
plan: "01"
subsystem: documentation
tags: [modal, architecture, documentation, audit]
dependency_graph:
  requires: []
  provides: [".planning/MODAL-STATE.md — complete modal state architecture reference"]
  affects: ["all future modal modifications (mandatory-read per CLAUDE.md)"]
tech_stack:
  added: []
  patterns: ["Mermaid stateDiagram-v2 for state machine documentation"]
key_files:
  created: []
  modified:
    - ".planning/MODAL-STATE.md"
decisions:
  - "Audited RecipientPickerModal as 9th overlay (not in original CONTEXT.md list, found at dashboard.slint:1362)"
  - "Documented FocusScope Esc gap in RecipientPickerModal — search TextInput auto-focus suppresses FocusScope, same as D-4 pattern"
  - "Ordered modals by complexity: LookupModal first (most complex), inline confirmations last"
metrics:
  duration_minutes: 25
  completed_date: "2026-04-16"
  tasks_completed: 2
  tasks_total: 2
  files_created: 0
  files_modified: 1
---

# Phase 20.5 Plan 01: Modal State Architectural Audit Summary

**One-liner:** Complete MODAL-STATE.md with 9 overlay components documented via Mermaid stateDiagram-v2, full callback chains with main.rs line numbers, Esc Priority Chain, 6 known pitfalls, and 4 mandatory agent rules.

---

## Tasks Completed

| Task | Name | Commit | Files |
|------|------|--------|-------|
| 1 | Audit RecipientPickerModal and verify RESEARCH.md data | 5072834 | (read-only — no files modified) |
| 2 | Write complete MODAL-STATE.md replacing placeholder | 5072834 | `.planning/MODAL-STATE.md` |

---

## What Was Built

`.planning/MODAL-STATE.md` replaces the placeholder with a complete 863-line architectural audit document covering all 9 overlay components in the app:

1. **LookupModal** — nested stateDiagram with 3 sub-states (SearchView, CreateProductView, ReassignPrompt, UnitCreating); 8 callback chains with line numbers; 5 Esc paths documented
2. **SettingsModal** — self-gating architecture (unique among modals); INV-2 compliance sites identified; parallel dismiss paths documented (F1 risk)
3. **StateTransitionModal** — two entry points (card context vs product detail context); optimistic dismiss pattern (Pitfall 5); unassign-checked reset gap documented
4. **AddProductForm** — 3 parallel dismiss paths; no Esc handling (gap)
5. **RecipientDetailPanel** — mounted sidebar (not overlay); two-level Esc (cancel edit vs dismiss sidebar); D-08 retained callback warning
6. **ProductDetailPanel** — mounted sidecar; no Esc; dismissed via global-keys FocusScope
7. **Delete-item confirmation** — inline dashboard component; no Esc; optimistic dismiss
8. **Start-return confirmation** — inline dashboard component; no Esc
9. **RecipientPickerModal** — newly audited (Assumption A1 from RESEARCH.md resolved); FocusScope present but suppressed by auto-focused search TextInput

### Key Sections

- **Agent Rules (RULE-M-01 through RULE-M-04):** Mandatory rules extracted from failure patterns
- **Esc Priority Chain:** 5 priority levels + 5 documented gaps (StateTransitionModal, AddProductForm, delete-item, start-return, RecipientPickerModal when search focused)
- **Cross-Modal Interaction Map:** 6 inter-modal trigger relationships including ProductDetailPanel→StateTransitionModal and LookupModal→global-keys focus handoff
- **Known Pitfalls 1-6:** Each with What/Why/How/Warning-signs format
- **Don't Hand-Roll table:** 4 anti-patterns with established alternatives

---

## Deviations from Plan

### Task 1 findings incorporated

**RecipientPickerModal Esc gap (RULE-M-04 violation):** The FocusScope exists but the search TextInput is auto-focused via `changed focus-trigger` handler when modal becomes visible (recipient-picker.slint:142–148). Once auto-focused, the FocusScope's Esc handler does NOT fire. The search TextInput has no key-pressed handler. Result: Esc does nothing in the normal (search-focused) state. This is the same D-4 gap found in LookupModal but unfixed here. Documented in MODAL-STATE.md modal #9 and Esc Priority Chain gaps list.

No code was changed — this is a documentation-only phase.

---

## Verification Results

```
grep -c "stateDiagram-v2" .planning/MODAL-STATE.md  → 9  ✓ (required: >= 9)
grep -c "^## [0-9]" .planning/MODAL-STATE.md        → 9  ✓ (required: 9)
grep -c "RULE-M-0[1-4]" .planning/MODAL-STATE.md    → 14 ✓ (required: 4 unique)
grep "TBD|to be populated" .planning/MODAL-STATE.md  → 0  ✓ (required: 0)
wc -l .planning/MODAL-STATE.md                       → 863 ✓ (required: > 350)
```

---

## Known Stubs

None. This is a documentation phase — no stub data patterns apply.

---

## Threat Flags

None. Documentation-only phase. No new network endpoints, auth paths, file access patterns, or schema changes.

---

## Self-Check

- [x] `.planning/MODAL-STATE.md` exists and is 863 lines
- [x] Commit 5072834 exists in git log
- [x] All 9 stateDiagram-v2 blocks present
- [x] All 4 RULE-M-0x rules present
- [x] No placeholder text (TBD / "to be populated") remains
- [x] Cross-references C-3, D-4, bac9584, INV-2 all present

## Self-Check: PASSED