The mocked route tests moved onto the kit take the ratchets down: route
tests mocking @/lib/db wholesale 321 to 274, route tests stubbing
apiHandler 138 to 133, as never casts in tests 6 014 to 5 496, and version
stamp comments 10 634 to 10 592 with the deleted files.
Add a ratchet mechanism (helpers/ratchet.ts): per-key counts against a JSON
baseline under src/__tests__/baselines/. A new key or a higher count fails;
a lower count fails until it is written back with
`RATCHET_WRITE=1 pnpm vitest run <guard>`, which only ever lowers numbers.
Raising one is a hand edit in a reviewed change. The baselines are
machine-written, so prettier leaves them alone.
helpers/source-metrics.ts measures the production tree through the
TypeScript compiler: the file list (dot directories included, tests and
generated code out), line counts, every function node with a stable
"outer > inner" name and its length, and the runtime import graph.
Guards and their baselines, measured on this tree:
- source-size-ratchet: 129 files over 800 lines and 415 functions over 200
lines (catalog and data files exempt, each named with its reason; slack
25 and 10 lines before a shrink must be written back).
- test-realism-ratchet: 321 route tests mocking @/lib/db wholesale, 138
stubbing @/lib/api-handler, 6014 `as never` casts in 570 test files, and
400 test files that read a source file by path (reads through readSource
are not counted).
- version-stamp-ratchet: 10634 comment lines in 2985 files that open with a
release version; none may be added.
Proof each can fail: a planted 953-line file with a 253-line function failed
both size ratchets, and one line appended to app/page-client.tsx failed the
file ratchet (2326 → 2327); a planted route test with vi.mock("@/lib/db")
and one `as never` failed both of those ratchets; a planted comment
"// v1.45.0 — probe stamp" failed the stamp ratchet. Raising one as-never
baseline entry by 5 failed with the write-back message, and RATCHET_WRITE=1
restored the file byte for byte. All probes were removed again.
Marc-André Bombeck