fix(#683): auto-degrade phase execution to sequential on worktree base mismatch (#749)

* fix(#683): auto-degrade phase execution to sequential on worktree base mismatch

Claude Code forks worktree-isolated executors off the repository default
branch (origin/HEAD), not the orchestrator's HEAD. Running /gsd-execute-phase
on a branch diverged from the default (unmerged milestone/feature branch) left
every executor without the phase's plan files and tripped the
worktree-branch-check guard with `exit 42` — 100% reproducible, all OSes.

- New module src/worktree-base-ref.cts: HEAD-vs-fork-base drift detection
  (origin/HEAD with symbolic-ref fallback) and no-clobber worktree.baseRef
  management, exposed as `worktree base-check` / `worktree set-baseref`.
- execute-phase.md: pre-dispatch, for Claude Code with worktrees enabled,
  auto-degrades the run to sequential on the main tree when a base mismatch
  is detected, recommending worktree.baseRef:"head". The exit-42 guard stays
  as a backstop.
- Installer: fresh local Claude installs set worktree.baseRef:"head" in
  .claude/settings.local.json (no-clobber, respecting an explicit shared
  settings.json value); upgrades print an opt-in notice pointing at
  `gsd-tools worktree set-baseref`.
- Docs: how-to guide, CLI/config reference, planning-config cross-ref.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#683): auto-apply worktree.baseRef on upgrade; gate fresh+upgrade on use_worktrees

Per maintainer direction: on a local Claude Code UPGRADE, set
worktree.baseRef:"head" automatically (no opt-in notice) when the project's
workflow.use_worktrees is enabled, instead of merely printing a remediation
notice. For consistency the FRESH path is now gated the same way: both paths
compute worktrees-enabled once (bounded walk-up read of .planning/config.json,
default enabled unless workflow.use_worktrees === false) and apply the
no-clobber baseRef only when enabled — never overwriting an explicit value in
settings.local.json or a shared settings.json. gsd-tools worktree set-baseref
remains for manual use. Docs + changeset updated; tests hardened (file-exists
assertions, fresh+disabled case, upgrade idempotency).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#683): measure workflow byte-budget on LF, fixing Windows-only CI failure

The workflow-size-budget test failed only on Windows: git checks out the .md
files as CRLF (no eol=lf in .gitattributes) and byteCount used
fs.statSync().size (raw on-disk bytes), counting an extra \r per line. That
inflated execute-phase.md — the XL high-water-mark file pinned near its ceiling
by the tighten-only ratchet — from 88492 LF bytes to ~90245 on Windows, over
the 90000 XL ceiling, while passing on the LF-checkout Mac/Linux runners.

The ceilings are explicitly "calibrated against raw `wc -c`" on an LF checkout,
so the measurement should be LF-based on every platform. byteCount now reads the
file and counts Buffer.byteLength after stripping CR, making the budget
platform-independent (a no-op on LF checkouts; verified statSync === normalized
for all 88 workflow files). No ceilings changed. Added a regression test
asserting CRLF and LF content of the same file count identically.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(#683): make worktree-base-ref test path mocks Windows-safe (path.join)

tests/worktree-base-ref.test.cjs keyed its injected readFile/writeFile mocks
(and a few expected `file` values) with forward-slash template literals like
`${claudeDir}/settings.local.json`. The module composes those paths with
path.join(), which emits backslashes on Windows, so the mock keys never matched
the module's lookup → readFile returned null → resolveEffectiveBaseRef /
cmdWorktreeBaseCheck / cmdWorktreeSetBaseRef (and the JSONC variants) failed on
the Windows full-test runner only (they passed on Mac/Linux, and the install
tests passed because they use the real filesystem). The module is correct;
only the test fixtures hardcoded '/'.

All mock keys and path assertions now use path.join(base, ...) mirroring the
module, so they match on every platform (no-op on POSIX). 19 path references
across 16 lines.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Tom Boucher
2026-06-06 23:40:24 -04:00
committed by GitHub
parent edd3c6c332
commit cf8bd3cd5e
18 changed files with 2077 additions and 9 deletions

View File

@@ -245,7 +245,7 @@ All workflow toggles follow the **absent = enabled** pattern. If a key is missin
| `workflow.max_discuss_passes` | number | `3` | Maximum number of question rounds in discuss-phase before the workflow stops asking. Useful in headless/auto mode to prevent infinite discussion loops. |
| `workflow.skip_discuss` | boolean | `false` | When `true`, `/gsd-autonomous` bypasses the discuss-phase entirely, writing minimal CONTEXT.md from the ROADMAP phase goal. Useful for projects where developer preferences are fully captured in PROJECT.md/REQUIREMENTS.md. Added in v1.28 |
| `workflow.text_mode` | boolean | `false` | Replaces AskUserQuestion TUI menus with plain-text numbered lists. Required for Claude Code remote sessions (`/rc` mode) where TUI menus don't render. Can also be set per-session with `--text` flag on discuss-phase. Added in v1.28 |
| `workflow.use_worktrees` | boolean | `true` | When `false`, disables git worktree isolation for parallel execution. Users who prefer sequential execution or whose environment does not support worktrees can disable this. Added in v1.31 |
| `workflow.use_worktrees` | boolean | `true` | When `false`, disables git worktree isolation for parallel execution. Users who prefer sequential execution or whose environment does not support worktrees can disable this. Added in v1.31. **Branch-divergence note:** when your branch is ahead of `origin/HEAD`, GSD auto-degrades to sequential and prints a warning. Set `worktree.baseRef:"head"` in `.claude/settings.local.json` (run `node gsd-tools.cjs worktree set-baseref`) to restore parallel execution. See [Fix the worktree base-mismatch (exit 42) error](how-to/fix-worktree-base-mismatch.md). |
| `workflow.worktree_skip_hooks` | boolean | `false` | When `true`, executor agents in worktree mode pass `--no-verify` (skipping pre-commit hooks) and post-wave hook validation runs against the merged result instead. Opt-in escape hatch for projects whose hooks cannot run in agent worktrees. Default `false` runs hooks on every commit (#2924). |
| `workflow.code_review` | boolean | `true` | Enable `/gsd-code-review` and `/gsd-code-review --fix` commands. When `false`, the commands exit with a configuration gate message. Added in v1.34 |
| `workflow.code_review_depth` | string | `standard` | Default review depth for `/gsd-code-review`: `quick` (pattern-matching only), `standard` (per-file analysis), or `deep` (cross-file with import graphs). Can be overridden per-run with `--depth=`. Added in v1.34 |