vitest excludes are root-anchored, so a worktree inside the repo is swept into every test run

[Hazzng]

Summary

vitest.config.ts excludes the heavy bash-comparison suite with a root-anchored glob:

exclude: ["**/node_modules/**", "**/dist/**", "comparison/**/*.comparison.test.ts"],

comparison/**/... only matches the repo-root comparison/ directory. A git worktree checked out inside the repo therefore has its own copy of comparison/ swept into every run — along with a duplicate copy of the entire src/ suite.

This is not hypothetical: Claude Code's agent worktree isolation creates worktrees at .claude/worktrees/<id>/ by default, i.e. inside the repo.

Measured

With one agent worktree present, from a clean tree:

	Test files	Tests	Result
pnpm test:unit (worktree present)	284	3014	3 files / 6 tests failed, 14.9s
same, with --exclude '.claude/**'	117	1195	passed, 5.6s

All 6 failures were inside .claude/worktrees/<id>/comparison/*.comparison.test.ts — real-bash comparison fixtures that are deliberately excluded at the root and are not meant to gate anything.

The effect is a red, ~3x slower gate that reports failures in files the developer never edited, attributed to paths that do not exist in their branch.

Note on a wrong first guess

pnpm test:unit passes --exclude 'src/**/integration/**' on the CLI. It would be reasonable to assume that replaces the config list and loses the comparison exclusion — it does not. CLI --exclude is additive here; the root comparison/ suite stays excluded correctly. The root-anchored glob is the whole story.

Suggested fix

Make the excludes path-independent and ignore in-repo worktrees:

exclude: ["**/node_modules/**", "**/dist/**", "**/comparison/**/*.comparison.test.ts", "**/.claude/**"],

Provenance

Found while orchestrating the #164-#175 hardening stack, when an agent worktree turned the gate red for an unrelated PR.