docs: activate Claude TASK-006A handoff

docs/development-log.md

@@ -76,3 +76,13 @@ This is the append-only implementation and handoff record shared by Codex and Cl
 - Known limitations: Mailboxes coordinate repository-based handoff and do not provide real-time notification; agents must inspect them at task start.
 - Next recommended task: Claude implements TASK-006A only and hands its commit to Codex for review.
 - Next owner: Claude.
+
+## 2026-08-25 — TASK-012 review closure and activation
+
+- Agent and role: Codex, finding resolver and handoff owner; Claude, independent read-only reviewer
+- Commit/diff: reviewed package commit `57d1c09`; immutable activation ref `handoff/task-006a-ready`
+- Findings resolved: Canonical delivery sequence now explicitly permits independent TASK-006A before the TASK-004/005 remainder; TASK-006A authorizes only its completion-log append; both mailbox directions share symmetric immutable templates and unique correction filenames; completed OAuth evidence is synchronized.
+- Checks and results: Documentation cross-references and task dependencies inspected; `git diff --check` passed before activation; no Android production file or external infrastructure changed.
+- Review result: No handoff activation occurs until the tag resolves to the committed metadata state. Claude checks out the tag, creates a `claude/` branch, implements TASK-006A only, and then stops for Codex review.
+- Known limitation: Repository mailboxes are asynchronous and must be checked manually at task start.
+- Next owner: Claude for TASK-006A.

handoff/README.md

@@ -26,6 +26,7 @@ Filename format:
 ```text
 Question: YYYYMMDD-HHMM-TASK-###-short-topic.md
 Answer:   <exact-question-stem>-answer.md
+Answer correction: <exact-question-stem>-answer-correction-YYYYMMDD-HHMM.md
 ```
 
 ### Common question template
@@ -56,6 +57,7 @@ Answer:   <exact-question-stem>-answer.md
 - Responds to: <exact repository-relative question path>
 - Task: TASK-###
 - Decision authority: task contract | existing ADR | human decision required
+- Supersedes: <exact repository-relative prior answer path; correction only>
 
 ## Answer
 
@@ -64,7 +66,7 @@ Answer:   <exact-question-stem>-answer.md
 ## Required checks or next action
 ```
 
-An answer uses the exact question stem with `-answer.md` appended and repeats the exact repository-relative question path under `Responds to`. A correction is a new normally named file with `Supersedes: <exact repository-relative path>` in its metadata; the old file remains unchanged. One file contains one bounded question or answer. Secrets, tokens, authorization codes, cookies, personal data, and source-file contents from private repositories must never be copied into these files.
+An initial answer uses the exact question stem with `-answer.md` appended and repeats the exact repository-relative question path under `Responds to`. An answer correction uses `<question-stem>-answer-correction-YYYYMMDD-HHMM.md`, keeps the original `Responds to`, and adds `Supersedes: <exact repository-relative prior answer path>`; the old file remains unchanged. A question correction uses a new timestamped question filename and adds `Supersedes` pointing to the prior question. One file contains one bounded question or answer. Secrets, tokens, authorization codes, cookies, personal data, and source-file contents from private repositories must never be copied into these files.
 
 ## Ownership
 

handoff/current-status-and-roadmap.md

@@ -1,7 +1,8 @@
 # UBGitea current status and development roadmap
 
 Last updated: 2026-08-25  
-Reviewed implementation baseline: `fc9d78a` plus TASK-012 documentation  
+Reviewed handoff package commit: `57d1c09`
+Claude activation ref: `handoff/task-006a-ready`
 Active branch: `codex/repository-browser-foundation`
 
 ## Completed and verified
@@ -35,7 +36,7 @@ Active branch: `codex/repository-browser-foundation`
 
 ## Immediate serial handoff
 
-Claude may now implement `TASK-006A` only.
+Claude may implement `TASK-006A` only from immutable Git tag `handoff/task-006a-ready`. The tag must resolve to a commit containing this status, task scope, prompt, mailbox rules, and review closure.
 
 - Outcome: classify already-loaded source bytes as bounded text, binary, Git LFS pointer, unsupported encoding, or oversized content.
 - Writable scope: only the paths listed in `tasks/006a-code-content-classifier.md`.

tasks/006a-code-content-classifier.md

@@ -1,6 +1,6 @@
 # TASK-006A: Classify source content safely
 
-Status: awaiting exact TASK-012 handoff commit
+Status: ready — start from immutable Git tag `handoff/task-006a-ready`
 Owner: Claude
 Reviewer: Codex
 
@@ -11,7 +11,7 @@ Classify already-loaded repository content into bounded text, binary, Git LFS po
 ## Contract freeze
 
 - Shared domain contract commit: `0929282`.
-- Claude starts from the reviewed application baseline `fc9d78a` plus the TASK-012 documentation handoff commit; no shared domain file may differ from `0929282` without an approved contract change.
+- Reviewed handoff package commit: `57d1c09`. Claude starts from immutable activation tag `handoff/task-006a-ready`; no shared domain file may differ from `0929282` without an approved contract change.
 - Input contracts: `SourceContent`, `SourceFile`, `RepositoryPath`, and `RepositoryRef` from TASK-003.
 - This task must not change the frozen domain contracts. Required changes use the request format in `docs/workstreams.md`.
 

tasks/012-agent-handoff-workspace.md

@@ -1,6 +1,6 @@
 # TASK-012: Establish the Codex-Claude handoff workspace
 
-Status: implemented — review findings being resolved
+Status: complete — package `57d1c09`, activation tag `handoff/task-006a-ready`
 Owner: Codex
 Reviewer: Claude