fix: anchor .claude ignore patterns to the project root

[7nohe]

Problem

Both ignore patterns matched any ancestor path segment named .claude, not just a .claude directory inside the project. When the repo is checked out under a .claude/ path — which is how Claude Code worktree sessions run (.claude/worktrees/<name>) — this silently disabled both quality gates.

Coverage (the dangerous one). Vitest matches coverage.exclude against absolute paths with picomatch's contains option:

pm.isMatch(filename, glob, { contains: true, dot: true, ignore: this.options.exclude })

so .claude/** matched every source file. npm test reported:

All files          |   0 |   0 |   0 |   0
Statements   : Unknown% ( 0/0 )

The configured thresholds (95% lines/functions/statements, 90% branches) then passed vacuously — a green npm test measuring nothing.

Lint. Biome resolved !**/.claude against an ancestor directory, so biome check . reported Checked 0 files / "No files were processed in the specified paths" instead of linting.

Fix

• vitest.config.ts: build the exclude from the config file's own absolute directory (${projectRoot}.claude/**). Since the pattern is matched against absolute paths in contains mode, an absolute prefix is the only available anchor. Backslashes are normalized because vitest slashes the file path but not the pattern, and Windows is in the CI matrix.
• biome.json: !**/.claude → !.claude, which is anchored to the project root. !/.claude and !./.claude were tested and do not work — Biome descends into .claude/worktrees/ with either.

test.exclude deliberately keeps .claude/**: it is globbed by tinyglobby relative to the project root, so it is already anchored and never broke. It is also the load-bearing pattern that stops a main-checkout run from collecting .claude/worktrees/*/tests/*.test.ts, and an absolute pattern is not reliably supported by tinyglobby's ignore. That picomatch/tinyglobby asymmetry is why only coverage.exclude changes.

Verification

Main checkout (/…/openapi-react-query-codegen), before → after:

	before	after
biome check .	109 files	109 files
coverage (stmts/branch/funcs/lines)	98.36 / 90.07 / 99.29 / 99.05	98.36 / 90.07 / 99.29 / 99.05
test files collected	16	16 (0 paths under .claude)

Throwaway worktree under .claude/worktrees/, before → after:

	before	after
biome check .	0 files (No files were processed)	108 files
coverage	0/0, Unknown%	98.36 / 90.07 / 99.29 / 99.05
tests	—	16 files, 194 passed

Both patterns also narrow from any-depth to root-only, so a hypothetical nested .claude (e.g. examples/foo/.claude) would no longer be ignored. The identical main-checkout file count (109) and identical coverage numbers show no such directory exists today.

The repo's own .claude/ directory is still ignored:

• Biome — proven by the main-checkout count staying at exactly 109 with 5 nested worktree copies of src/*.mts present under .claude/worktrees/; had the anchor stopped suppressing descent, that number would explode. The biome report contains 0 .claude paths.
• Coverage — proven by the picomatch assertion below (own .claude (want false): false), not by a run. With no coverage.include set, getUntestedFiles early-returns, so coverage only ever sees files the tests actually load and nothing under .claude/ is ever loaded; the pattern is belt-and-braces there. (The vitest list --filesOnly result above exercises test.exclude, which is unchanged.)

The picomatch call vitest actually makes was also asserted directly for posix and Windows-style roots:

old  <worktree root>   own src (want true): false   <- the bug
new  <worktree root>   own src (want true): true  | own .claude (want false): false
new  C:/a/…            own src (want true): true  | own .claude (want false): false

[vercel]

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Project	Deployment	Actions	Updated (UTC)
openapi-react-query-codegen	Ready	Preview	Aug 11, 2026 10:40am

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🟢	Lines	99.22% (🎯 95%)	509 / 513
🟢	Statements	98.49% (🎯 95%)	524 / 532
🟢	Functions	99.24% (🎯 95%)	132 / 133
🟢	Branches	90.57% (🎯 90%)	221 / 244

File Coverage

No changed files found.

Generated in workflow #440 for commit 85f0c29 by the Vitest Coverage Report Action