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xarmian a1716d8170 ci(web): decide the npm audit gate from the report, not the exit code, and run it last (BUG-2881) (#1247)
* ci(web): decide the npm audit gate from the report, not the exit code, and run it last (BUG-2881)

`npm audit` exits non-zero identically for "a HIGH/CRITICAL advisory
exists" and "the advisory service was unreachable". The Web job ran it
before Build / Type check / vitest under `bash -e`, so a registry
timeout (main, 03:50Z) and a 503 (#1246, 04:33Z) on 2026-09-04 each
produced a red row with every frontend verification step SKIPPED — a
lane that read like a failure and had asked nothing.

scripts/ci-audit.mjs runs the audit in --json mode and decides from the
report: metadata.vulnerabilities present → fail iff high+critical > 0,
naming the advisories; an error envelope or unparseable output → a
GitHub warning annotation saying the gate did not run, exit 0. The step
moves to the end of the job so the frontend's own verdict always exists
whatever the audit does.

Verified locally against five report shapes (transport timeout envelope,
E503 envelope, one high advisory, clean, garbage) and two live runs (the
real registry: clean; a dead registry: warning, exit 0). `--input <file>`
is the seam those checks use.

Fixes BUG-2881

* ci(web): the audit gate fails closed — retry an unreachable advisory service, then fail under its own title

Codex round 1 on #1247: the first draft warned and exited 0 when the
advisory service could not be asked, which made the only supply-chain
gate pass exactly when it had not run. A gate that passes when it cannot
run is not a gate.

Now: up to three attempts with backoff (registry blips are usually
seconds long), then `::error title=npm audit did not run` and exit 1.
The title is distinct from `::error title=npm audit` (a real advisory)
so the checks tab tells the two apart without opening the log; re-running
is the remedy for the first and never for the second. Because the step
runs last, Build / Type check / vitest have already produced their result
either way — the original blindness is gone regardless of which way this
step fails.

Verified against the same five saved shapes (transport and E503 envelopes
and garbage now exit 1 under the did-not-run title; a high advisory exits
1 under the advisory title; clean exits 0) and two live runs (real
registry: clean; dead registry: three attempts logged, exit 1).

Refs BUG-2881

* ci(web): the audit gate refuses counts it cannot read, and refuses bad tuning without crashing

Codex round 2 on #1247. (1) metadata.vulnerabilities was checked for
presence, not for shape: Number("x") + Number(null) > 0 is false, so a
malformed count read as a clean audit — a second fail-open, one layer
deeper than round 1's. high/critical must now be non-negative integers
or the report is unreadable, which is the fail-closed path. (2) The two
env knobs are operator-set, but CI_AUDIT_ATTEMPTS=NaN left the retry loop
unexecuted and threw a TypeError, and CI_AUDIT_BACKOFF_MS=Infinity parked
Atomics.wait forever; both now fall back to the default with a line
saying so.

Refs BUG-2881

* build: the local preflight runs the same audit gate CI does, and runs it last

Codex round 3 on #1247 (blast radius): `make web-check` still chained
bare `npm audit && npm run check`, so a registry blip stopped svelte-check
locally exactly as it had in CI, and CONTRIBUTING documented the bare
command as the way to reproduce the gate. New `web-audit` target runs
`npm run audit:ci`; `check` runs it after web-check and web-test, mirroring
the Web job's order. CONTRIBUTING and docs/architecture.md say so.

Refs BUG-2881

* build: web-audit stands alone — no `web` prerequisite, so `check` runs npm ci once and no new target reaches it

Codex round 4 on #1247: `web-audit: web` made `check` run `npm ci` twice
(`web` is .PHONY) and added a target CLAUDE.md's worktree rule did not
list as reaching `npm ci`. `npm audit` reads the lockfile and needs
neither node_modules nor a build — verified by running it with
node_modules removed — so the prerequisite goes; CLAUDE.md's safe list
gains `web-audit`.

Refs BUG-2881
2026-09-04 10:45:21 -04:00
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