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Record TASK-002A development handoff

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최민영 2026-08-25 22:13:36 +09:00
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@ -28,8 +28,15 @@ This is the append-only implementation and handoff record shared by Codex and Cl
- Next recommended task: OAuth protocol core followed by Android OAuth integration.
- Next owner: Codex.
## Current ownership
## 2026-08-25 — TASK-002A
- Active task: TASK-002A OAuth protocol core
- Current writer: Codex
- Claude status: waiting; TASK-006A is queued until an explicit handoff is appended.
- Agent and role: Codex, implementer and integrator
- Commit/diff: `6da016c`
- Features implemented: OAuth client configuration, approved read-only scopes, fresh PKCE S256 verifier/state generation, authorization URL construction, exact redirect validation, transaction expiry, denial/success modeling, and strict callback query validation.
- How it was implemented: Pure Kotlin/JDK code with `SecureRandom`, SHA-256, unpadded Base64 URL encoding, RFC 7636 verifier grammar, deterministic query component encoding, constant-time state comparison, strict UTF-8 percent decoding, duplicate/ambiguous response rejection, saturating time boundaries, and redacted string representations for sensitive values.
- Files changed: `core/auth/protocol/`, matching protocol tests, ADR-002, TASK-002 umbrella, TASK-002A, and TASK-002B.
- Checks and results: Focused OAuth tests 21/21 passed; full unit tests 43/43 passed; debug APK build passed; Android lint passed; diff check passed; sensitive-pattern scan found no assigned secret/token/password/private key.
- Review findings and resolutions: P2 verifier grammar fixed with strict RFC character/length validation; P2 parameter pollution and malformed UTF-8 fixed with fail-closed parsing; P3 timestamp overflow fixed with saturating boundaries. Independent re-review found no remaining P0-P3 findings.
- Known limitations: System browser launch, App Link dispatch, code exchange, Keystore token vault, user identity, and real-server E2E are intentionally deferred to TASK-002B. E2E remains blocked by signing fingerprints and hosted `assetlinks.json`.
- Next recommended task: TASK-002B Android OAuth integration, completing locally testable browser/storage/exchange boundaries before the external E2E gate.
- Next owner: Codex.