Two-part fix for the gen-skill-docs-out-dir isolation-pin failure:
- cookie-import-browser built its scratch cookie DBs inside the TRACKED
browse/test/fixtures/ dir (created in beforeAll, deleted in afterAll), so
they flash as untracked files mid-run — a concurrent shard's porcelain
snapshot caught the window on Windows. The DBs now live in a per-run
tmpdir; zero source-tree writes.
- gen-skill-docs-out-dir is the free suite's only LIVE porcelain-snapshot
test, so it joins TREE_MUTATING (the serial quiet window): any concurrent
transient tree-write can race it, and its own spawned render rewrites
llms.txt/agents-digest in place (idempotent on a fresh tree).
The race is pre-existing; this branch's +5 test files reshuffled shard
composition and exposed it.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
