The checklist grammar and the #tag rule are implemented three times (derive.rs,
checklist.py/tags.py, markdown.ts), and the tag colour twice (colors.ts,
DerivedTint.kt). Only Rust and Kotlin had tests. core/testdata/grammar.json now
holds one set of cases (task lines, rendered items, tags, standalone-tag lifts
and the tint hashes), and every suite reads it.
- web: vitest, a dev dependency approved for #5166, with `npm test`.
grammar.test.ts runs the fixture, and titles.test.ts pins #5165's palette fix.
- ci.yml runs the web tests in the job the image build needs. desktop.yml's
verify job runs them too, because the installers embed this frontend and
can't see ci.yml's verdict (rule 177).
- core: derive.rs reads the fixture. server: tests/test_grammar_fixture.py.
- Android keeps its hand-written tint values; its doc now points at the fixture.
The server is expected red here, on purpose. tags.py only takes a tag after
whitespace and lets it start with a digit or `_`, while the core (the
definition) takes any non-tag boundary and needs a letter. So `(#todo)` is a
label on the phone and plain text on the server. The fix follows.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
