All three findings are the same shape: a check that accepts a command which
exists but cannot gate.
- Splitting on `|` and `&` conflated `||`, so both failure-masking forms counted:
`npm run X || true` swallows a rejection and `true || npm run X` never runs
the validator. Both `runsCommand` and the chain walk now split on `\n`, `;`
and `&&` only, which refuses each without special-casing either.
- A CI step (or job) carrying `continue-on-error` asserts nothing, since a
rejected skill leaves the workflow green. Both are now skipped, treating a
string `"true"` and an unevaluable `${{ }}` expression as masking on the same
conservative principle as the `if:` checks; an explicit `false` still counts.
- `rootReachesScript` was substring-based, so a `validate` reading `echo npm run
verify:skills` satisfied the sibling vouch while the guard never executed —
the cycle protecting nothing. It now uses the exact chain walk, which is
therefore shared in `lib/npm-scripts.mjs` and fixes the same hole in all four
vouches, not just this PR's. `reachableScripts` keeps its substring behavior
for the harvesting callers, where over-inclusion is safe.
The chain walk also follows npm's implicit pre/post hooks, with a test — a guard
invoked from a `prevalidate` is genuinely run, and reporting it missing would be
a false failure introduced by the fix.
Signed-off-by: cliffhall <cliff@futurescale.com>
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