The #399 E2E path-filter listed its safe paths as POSITIVE globs under
`predicate-quantifier: 'every'`. dorny/paths-filter's `every` makes the
per-file predicate "matches EVERY pattern", so `skippable` required a single
file to be under app/src/test AND docs AND scripts AND .claude AND be *.md at
once -- impossible. `skippable` was therefore always false and the full E2E
matrix ran for every PR, including the docs/scripts-only PRs it was meant to
skip (e.g. scripts-only #419).
Rewrite the filter the way dorny documents `every`: `non_skippable` lists the
same safe allow-globs, each NEGATED, so a file forces E2E iff it matches NONE
of them (i.e. it is outside the allow-list). e2e_needed = non_skippable, keeping
the fail-safe "run E2E unless every changed file is provably irrelevant" rule --
a mixed PR still runs the matrix.
Add an `e2e_harness` override so a change under .claude/skills/preflight/** (the
local instrumented-test harness) still forces E2E even though .claude/** is
otherwise skippable.
Skip: app/src/test/**, **/*.md, docs/**, scripts/**, .claude/** (minus preflight).
Run: everything else -- app/**, *.gradle*, gradle/**, gradle/libs.versions.toml,
app/schemas, app/proguard-rules.pro, .github/workflows/**, .github/scripts/**,
.claude/skills/preflight/**. This ci.yml change itself runs the matrix.
Verified with PyYAML (valid) + a dorny-semantics simulation over representative
changed-file sets (scripts-only/docs/unit-test/.claude skip; app/androidTest/
gradle/ci.yml/preflight/.github-scripts run).
Closes#420