---
phase: 01-foundation-and-shared-state
plan: 02
subsystem: auth
tags: [credentials, windows, redaction, security]
requires:
  - phase: 01-01
    provides: workspace and runtime crate boundaries
provides:
  - Format-only credential config contracts for GitHub OAuth and Shopify token
  - Secret store abstraction with Windows-first and encrypted fallback providers
  - Credential redaction and regression tests
affects: [integrations, service-api, sync]
tech-stack:
  added: [custom-secret-store-abstraction]
  patterns: [secret-ref indirection, fallback-provider-chain]
key-files:
  created:
    - crates/core/src/config/credentials.rs
    - crates/core/src/security/secret_store.rs
    - crates/service/src/bootstrap/credential_loader.rs
    - crates/service/src/security/windows_credential_manager.rs
    - crates/service/src/security/encrypted_fallback_store.rs
    - crates/service/src/security/redaction.rs
    - crates/service/tests/credential_config_tests.rs
  modified:
    - crates/core/src/lib.rs
    - crates/integrations/src/lib.rs
    - crates/service/src/lib.rs
key-decisions:
  - "Used package name wit_core to avoid conflict with Rust's built-in core crate."
  - "Kept validation format-only and provider-agnostic; no network checks."
patterns-established:
  - "Secret references always validated before store resolution."
  - "Windows secret backend failure routes to encrypted fallback only when backend unavailable."
requirements-completed: [AUTH-01, AUTH-02]
duration: 36min
completed: 2026-02-27
---

# Phase 1 Plan 02: Foundation and Shared State Summary

**Credential contracts and secure secret-resolution chain shipped with redaction-safe tests.**

## Performance

- **Duration:** 36 min
- **Started:** 2026-02-27T07:24:00Z
- **Completed:** 2026-02-27T08:00:00Z
- **Tasks:** 3
- **Files modified:** 22

## Accomplishments
- Added locked-decision credential schema with format-only validation behavior.
- Implemented runtime secret loading with Windows-first store and encrypted fallback.
- Added regression tests for redaction and missing-secret non-disclosure behavior.

## Task Commits

1. **Task 1: Define credential config contracts and format validation** - `ac86d61` (feat)
2. **Task 2: Implement secret-store chain and bootstrap loader** - `dc1e7f1` (feat)
3. **Task 3: Enforce redaction and add security regression tests** - `acc3118` (test)

**Plan metadata:** pending docs commit

## Files Created/Modified
- `crates/core/src/config/credentials.rs` - provider credential schema and validation.
- `crates/core/src/security/secret_store.rs` - shared secret-store trait and errors.
- `crates/service/src/bootstrap/credential_loader.rs` - preferred/fallback secret resolution.
- `crates/service/src/security/redaction.rs` - safe formatting for token-like values.
- `crates/service/tests/credential_config_tests.rs` - security regression suite.

## Decisions Made
- Renamed core package to `wit_core` to avoid Rust crate namespace collision.
- Preserved config-file credential UX while keeping secrets out of config payloads.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Rust crate namespace conflict**
- **Found during:** Task 1 compile/test pass
- **Issue:** Using package name `core` conflicts with Rust's built-in `core` crate namespace.
- **Fix:** Renamed package to `wit_core` while keeping directory structure unchanged.
- **Files modified:** `crates/core/Cargo.toml`, `crates/integrations/Cargo.toml`, `crates/service/Cargo.toml`, dependent source imports.
- **Verification:** all plan test commands pass under the updated package name.
- **Committed in:** `ac86d61`, `f7cb933`

---

**Total deviations:** 1 auto-fixed (1 blocking)
**Impact on plan:** No feature change; naming fix was required to make the planned architecture buildable.

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
Credential handling is now safe and test-covered, ready for repository and API wiring.

---
*Phase: 01-foundation-and-shared-state*
*Completed: 2026-02-27*