* feat(#3588): add an opt-in commit_docs pre-commit hook Final phase of epic #2292, scope narrowed to opt-in by maintainer decision: default-on installation and the bin/install.js wiring it would have required are explicitly out of scope. Enabling is an explicit verb call. The hook is written to the repo's real hooks dir resolved via git rev-parse --git-path hooks, so a linked worktree or submodule whose .git is a FILE works rather than getting a literal .git/hooks path. It refuses rather than overwrite a foreign pre-commit, refuses to delete one it did not write, and refuses outright when core.hooksPath is already set -- a written-but-ignored hook is worse than a refusal. Ownership is detected by marker presence, not byte-equality, so a user who appends a line does not make it unrecognizable. Deliberately NOT included: teaching cmdCheckCommit the per-phase commit_docs tier. #3587 was still unmerged when this landed, and implementing precedence against helpers that did not yet exist would have meant a second copy of the resolution chain -- the divergence class this epic has spent three phases fighting. That follows as its own change now that #3587 is on next. The ordering constraint is recorded in the design doc: this must not merge before #3587, or the hook would block a commit cmdCommit itself allows. * fix(#3588): teach the commit_docs guard the per-phase tier and -z paths Part 1, deferred until #3587 merged. cmdCheckCommit read only project-level commit_docs, so once #3587 landed, a phase with phase_commit_docs true under project false was ALLOWED by query commit and BLOCKED by this guard -- and the hook shipped in this same branch shells out to it. It now derives the staged phase via the single-owner detectPhaseNumberFromFiles and resolves through #3587's own resolveCommitDocsPolicy rather than a second precedence copy. Also fixes a proven false negative in the harm direction. git diff --cached --name-only C-style-quotes any path with non-ASCII or special characters, so a staged .planning/cafe.md was emitted as a quoted string, failed startsWith('.planning/'), and slipped past the guard entirely under commit_docs:false. Reading with -z and splitting on NUL removes the quoting at the source. The f.startsWith('.planning\\') branch was dead code under that read -- git emits /-separated paths on every platform -- and is removed rather than left implying coverage it never provided. The earlier C7 test pinned the buggy behavior as intended; it now asserts the file is detected and the commit refused. Self-caught: the commit-docs-guard verb was wired into the routers by this branch's earlier pass but missing from the top-level help listing. * test(#3588): replace try/finally with t.after, add negative-routing cases Standards review findings. CONTRIBUTING bans try/finally inside a test body outright -- it masks failures -- and B8 used one for worktree cleanup. Now t.after(), assertions unchanged. The new commit-docs-guard command family had zero negative-routing coverage, which CONTRIBUTING requires for any change to command dispatch. B11-B15 cover no subcommand, unknown, empty string, whitespace-only and a flag-shaped value, each asserting non-zero exit, a structured error, no stack trace, and -- the one that matters for a command that writes into a user's repo -- that NO hook is written in any of them. Those tests were verified to fail when routeCommitDocsGuard's else-branch is neutered, so they exercise the routing guard rather than any convenient error path. Also made two error() calls' control flow explicit with a return; they were safe only because error() is typed never two files away. * chore(#3588): backfill changeset pr number to 3609 * test(#3588): skip Windows-unrepresentable fixtures on win32 CI's Windows shards caught two of my own tests: fixtures whose filenames contain a quote and a backslash. Both are illegal on Windows -- backslash is the path separator, quote is invalid on NTFS -- so fixture creation failed before any assertion ran. Test-portability defect, not a production one. Those inputs cannot exist on that platform, so the guard has nothing to detect there. Both now check process.platform FIRST, before any fs or git call, and use t.skip() rather than a bare return -- a bare return registers as a PASS and would hide the gap it is meant to record. Each carries a comment saying the input is unrepresentable rather than unverified, so nobody later re-enables it. No padding added: the cafe.md case already exercises git's C-quoting path on every platform, since non-ASCII names are legal on NTFS. This is exactly the coverage the Linux-only remote matrix cannot provide, which the PR body already stated -- CI's Windows shards are what caught it. --------- Co-authored-by: sim <sim@local>
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