Files
msd-core/.changeset/1369-wave-stale-base-recheck.md
Tom Boucher f5276b36b3 fix(#1369): refresh wave manifest and re-check base before each wave in execute-phase (#1492)
* fix(#1369): refresh wave manifest and re-check base before each wave in execute-phase

Two compounding issues caused wave N+1 worktrees to fork from the stale
pre-wave-N commit, immediately tripping the worktree_branch_check FATAL
guard in every executor:

1. worktree.base-check auto-degrade only ran once at initialize time.
   After wave N merges advanced orchestrator HEAD past origin/HEAD, new
   worktrees were still forked from origin/HEAD (Claude Code "fresh" base).

2. WAVE_WORKTREE_MANIFEST was never unset between waves, so wave N+1
   reused the consumed wave-N manifest file, which would have blocked the
   step 5.5 manifest guard (#3384) on subsequent waves.

Fix: add two safeguards in execute-phase.md —
- Step 0.5 (start of each wave): re-runs worktree.base-check; auto-degrades
  USE_WORKTREES=false for that wave when HEAD has diverged from origin/HEAD.
- Step 7c (end of each wave): unsets WAVE_WORKTREE_MANIFEST so wave N+1
  creates a fresh per-wave manifest; re-asserts worktree.set-baseref
  (idempotent) and re-evaluates base degradation after wave merges land.

17 regression tests added in tests/bug-1369-wave-stale-base.test.cjs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(#1369): rename test to fix-NNN convention; update workflow size baseline

Rename tests/bug-1369-wave-stale-base.test.cjs → tests/fix-1369-wave-stale-base.test.cjs
to satisfy the lint-regression-test-names gate (new files cannot use bug-NNN prefix).

Update tests/workflow-size-baseline.json for execute-phase.md: 93157 → 97393
(LF-normalized byte count after adding step 0.5 inter-wave base re-check and
step 7c between-wave manifest reset).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(#1369): add issue reference to allow-test-rule comment

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(#1369): extract new execute-phase steps to references; satisfy ADR-857 cap

Step 0.5 (inter-wave worktree base re-check) and steps 7b–7c (pre-wave
dependency check + between-wave manifest reset/base refresh) added by this
PR grew execute-phase.md to 97393 bytes, violating the ADR-857 phase-6
architectural mandate that host-loop bodies remain strictly below the
pre-phase-6 baseline of 93166 bytes.

Extract both new blocks into dedicated reference files:
- gsd-core/references/execute-phase-wave-guard.md (step 0.5)
- gsd-core/references/execute-phase-between-wave-reset.md (steps 7b + 7c)

Replace inline prose with @-reference pointers. File now measures 92851
bytes (LF-normalized), satisfying the ADR-857 capstone conformance gate.

Also update tests/workflow-size-baseline.json to 92851 and add both new
reference files to docs/INVENTORY-MANIFEST.json.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(#1369): update regression tests to read from extracted reference files

Steps 0.5 and 7b+7c were moved to reference files to satisfy the ADR-857
size cap on execute-phase.md. Tests now check @-reference pointers in the
workflow for ordering and read content assertions from the reference files.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-06-20 14:22:59 -04:00

1.4 KiB

type, pr
type pr
Fixed 1369

execute-phase now re-checks the worktree fork base at the start of every wave and resets the wave manifest between waves (#1369) — two compounding issues caused wave N+1 worktrees to be created from the stale pre-wave-N commit. First, the worktree.base-check auto-degrade only ran once at initialize time; after Wave N merged and tracking commits advanced orchestrator HEAD past origin/HEAD, Wave N+1 worktrees were still forked from origin/HEAD (Claude Code's "fresh" base), causing both agents to immediately halt with FATAL: worktree base mismatch from the worktree_branch_check guard. Second, WAVE_WORKTREE_MANIFEST was never unset between waves, so wave N+1 would reuse the consumed wave-N manifest file, causing the step 5.5 manifest guard (#3384) to block on subsequent waves. Two safeguards fix this: step 0.5 in the execute_waves "For each wave" loop re-runs worktree.base-check before every wave's dispatch (when divergence is detected, USE_WORKTREES is overridden to false for that wave); step 7c between waves unsets WAVE_WORKTREE_MANIFEST so wave N+1 creates a fresh per-wave manifest, and re-asserts worktree.baseRef:"head" (idempotent) so the Claude Code harness re-reads the live HEAD on the next dispatch. The permanent fix remains setting worktree.baseRef:"head" in .claude/settings.local.json (see #683).