feat(pr-sync): native assess and author update-by-merge lifecycle
Prevent approved PRs from stalling when master advances. Add gitea_assess_pr_sync_status and gitea_update_pr_branch_by_merge with head/base pinning, author-only updates, conflict handoff, and approval invalidation after head changes. Wire task capability map, sequential controller routing in review-merge workflow, and hermetic AC tests.
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@@ -33,22 +33,34 @@ Steps:
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*If the current identity does not match the required role (or is the PR author), STOP. Relaunch/switch to the correct profile first.*
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2. Verify authenticated identity + active profile.
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3. Confirm PR #<pr>: author (not you), state open, mergeable, review approved. Check if PR body uses `Closes #N` or `Fixes #N`; if it uses `Implements #N` or `Refs #N`, manual closing will be needed in step 29.
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4. Capability evidence (#179): cite the exact gitea_resolve_task_capability
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4. **PR sync assess (required):** call `gitea_assess_pr_sync_status` with
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explicit `remote`/`org`/`repo`. Route on `recommended_next_action`:
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- `merge_now` → continue merger path (do **not** update the branch)
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- `update_branch_by_merge` → STOP; hand off to **author** for
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`gitea_update_pr_branch_by_merge` (pins expected PR head + base head)
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- `author_conflict_remediation` → STOP; author worktree conflict fix
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- `fresh_review_required` → STOP; independent re-review at current head
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- `blocked` → STOP and diagnose
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Never merge on a former-head approval after update/remediation.
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5. Capability evidence (#179): cite the exact gitea_resolve_task_capability
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output (or runtime context) proving merge_pr is allowed — a bare
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"capability checks passed" claim is downgraded.
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5. Final live-state recheck (#179), immediately before the merge mutation —
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6. Final live-state recheck (#179), immediately before the merge mutation —
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re-read the live PR and prove:
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- PR still open
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- live head SHA still equals the pinned/reviewed head SHA
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- base branch unchanged
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- no undismissed REQUEST_CHANGES / blocking review state remains
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If any recheck fails → STOP, re-pin, re-validate.
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6. If any gate fails → STOP and report.
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7. Merge with explicit confirmation (e.g. confirmation="MERGE PR <pr>"),
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7. If any gate fails → STOP and report.
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8. Merge with explicit confirmation (e.g. confirmation="MERGE PR <pr>"),
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pinning the reviewed head SHA (expected_head_sha) and, where supported,
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the changed-file set.
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8. Confirm remote master now contains the merge commit (or the expected changes if squash merged).
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9. Confirm remote master now contains the merge commit (or the expected changes if squash merged).
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*Note: Gitea PR "closed" state is NOT equivalent to "merged". Do not assume a closed PR succeeded without verifying the actual landed changes.*
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10. **Sequential queue:** after merge, refresh live `master`, run post-merge
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cleanup handoff, then reassess the **next** PR (do not batch-update all
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open PRs).
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Post-merge cleanup (#517): merger sessions must NOT perform ad hoc cleanup.
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- Record merge mutations separately from cleanup mutations in the controller handoff.
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