The check suite consumes source files through two entirely separate channels, and Phase 0 only hardened one of them. `withSourceResolution` wraps `ssrLoadModule`, which covers the 159 module loads. It does not and cannot see the other 30 sites, which read source as TEXT through `readFileSync` to assert structural facts - "the panel imports no local suggestion ranker", "no runtime path writes a definition". Renaming `base44Client.js` to `.ts` is what surfaced the difference: ENOENT in the middle of a suite that had been passing, from a line no grep for `ssrLoadModule` would ever have found. `resolveSourcePath()` in `ssr-resolve.mjs` reuses the existing `candidatesFor()` ordering - the written path first, then `.ts`, then `.tsx` - and returns a path relative to the root, so every call site keeps its `join(ROOT, ...)` as it was. An unresolvable path comes back unchanged, which keeps the two absence assertions honest: a check proving `store.js` is GONE still asks about the path it means, and now also notices if the file returns under another extension. Thirty-seven lines change, each a one-for-one replacement. No assertion text, no record() message, no ordering, no logic. The audit found the reads in four shapes, and two of them a path grep cannot see: - direct readFileSync(join(ROOT, 'src/x.jsx'), 'utf8') - via a const const P = join(ROOT, 'src/x.jsx') - dir + name ['node.js', 'patch.js'].map((f) => readFileSync(join(ROOT, 'src/lib/ui', f))) - path array for (const f of files) readFileSync(join(ROOT, f)) The third and fourth hide thirteen filenames in adjacent arrays, which is why the first estimate of this work was twenty-two files and the real number is thirty-five. One directory scan also filtered `/\.jsx?$/` over `src/pages/admin` and `src/components/agents`. That one does not crash - it quietly matches nothing once those directories are TypeScript, and the check passes having inspected an empty set. Widened to `/\.[jt]sx?$/`. A silent shrink is worse than a failure, and CI's FLOOR of 900 would not have caught it. Deliberately NOT touched, because they are correctly extension-specific: the `dist/assets` filter reads built bundles, which are `.js` whatever the source was; `scripts/stubs/react-hot-toast.js` and `scripts/browser-flows.js` are scripts, not migrated source; and every comment that mentions a `.js` filename says something true about a file that still has that name. Proven rather than assumed. `npm test` reports 1684/1691 before and after, the same seven failures. Then `src/api/base44Client.js` - the exact file whose rename broke the suite - was renamed to `.ts`, the suite re-run, and the check that reads it as text passed: "the app does not import the seed fixture". The rename was reverted and the file verified byte-identical. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HBG1wnuRfJKCstGB8Fekr8
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