fix(css): degrade files rejected by candidate extraction instead of failing every render - #3720
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…ailing every render The exact 1024-character-token crash was fixed on main (d60537f), but buildCandidateManifest still let sibling admission throws escape: a file with >100k distinct candidates (large minified vendor bundle) or >16MB of content threw a TypeError that aborted SSR shell generation, and because the throw happened before manifestCache.set, the manifest was rebuilt and re-threw on every request to the project. Isolate extraction per file: a rejected file now logs a warning and contributes no candidates, the manifest completes, and it is cached so the pathological file is not re-scanned per request. The tokenizer's admission guards stay intact for other callers. Fixes VERYFRONT-SERVER-F
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📝 WalkthroughWalkthroughCSS candidate manifest construction now skips files that exceed candidate-count or byte-size limits. It logs normalized diagnostic paths, preserves valid candidates from other files, and caches completed manifests. Tests verify rejection, logging, redaction, and caching behavior. ChangesCSS candidate resilience
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The change is localized and merge-ready after normal checks; the remaining requests are non-blocking test improvements for edge-case coverage and warning-path redaction. Possibly related PRs
Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
Comment |
📦 Client bundle boundary
A server module in a client graph aborts hydration in the browser. New leaks fail CI; known leaks are tracked in |
Candidate extraction failures are recoverable render diagnostics, but the source file path can arrive as an absolute filesystem path from the runtime adapter. The warning now reports an in-project relative path, or a basename-only outside-project marker for unexpected absolute input, while preserving the existing manifest key behavior for route matching. Constraint: AGENTS.md forbids machine-specific filesystem paths in logs and user-facing output Rejected: Drop the path field entirely | the warning would lose the only useful source locator for oversized generated files Confidence: high Scope-risk: narrow Directive: Keep cache keys and route matching independent from log redaction; only the diagnostic payload is sanitized here Tested: deno test --preload=src/testing/preload.ts --no-check --allow-all src/rendering/orchestrator/css-candidate-manifest.test.ts Tested: deno fmt --check src/rendering/orchestrator/css-candidate-manifest.ts src/rendering/orchestrator/css-candidate-manifest.test.ts Tested: deno lint src/rendering/orchestrator/css-candidate-manifest.ts src/rendering/orchestrator/css-candidate-manifest.test.ts Tested: deno check src/rendering/orchestrator/css-candidate-manifest.ts src/rendering/orchestrator/css-candidate-manifest.test.ts
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Inline comments:
In `@src/rendering/orchestrator/css-candidate-manifest.test.ts`:
- Around line 310-329: Update the test case around getProjectCandidates so
oversized is built from a known candidate such as text-blue-500, then assert
result.has("text-blue-500") is false to verify byte-capped content contributes
no candidates; retain the existing assertion that the normal file’s text-red-500
candidate remains available.
- Around line 280-308: Extend the rejected-file test around getProjectCandidates
to include a file path outside projectDir, exercising the external-path
redaction branch. Assert that the emitted warning context path is exactly
“[outside-project]/minified.js” and contains no parent-directory information,
while preserving the existing in-project redaction assertions.
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Fix all unresolved CodeRabbit comments on this PR:
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📒 Files selected for processing (2)
src/rendering/orchestrator/css-candidate-manifest.test.tssrc/rendering/orchestrator/css-candidate-manifest.ts
CodeRabbit asked for exact coverage of the outside-project diagnostic path and for the byte-size rejection test to prove rejected source content contributes no candidates. The implementation already had the needed behavior, so this commit tightens only the regression coverage. Constraint: discussion_r3786318988 requires exact [outside-project]/minified.js coverage without parent leakage Constraint: discussion_r3786318991 requires byte-capped content built from a known candidate with an explicit absence assertion Rejected: Change production redaction or extraction behavior | focused tests passed against the current implementation Confidence: high Scope-risk: narrow Directive: Keep these assertions tied to emitted structured warning context, not formatted console text Tested: deno test --preload=src/testing/preload.ts --no-check --allow-all src/rendering/orchestrator/css-candidate-manifest.test.ts Tested: deno fmt --check src/rendering/orchestrator/css-candidate-manifest.test.ts Tested: deno lint src/rendering/orchestrator/css-candidate-manifest.test.ts Tested: deno check src/rendering/orchestrator/css-candidate-manifest.test.ts
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Follow-up hardening for VERYFRONT-SERVER-F (975 events in ~90 min on Aug 6; the literal 1024-char-token throw was already fixed by d60537f / v0.1.1205 the same day — Sentry issue resolved with evidence).
Remaining defect
Two sibling crash-on-user-content throws stayed live on the exact same per-request, no-negative-caching SSR path that produced the original storm:
candidate-tokenizer.ts: TypeError when one file yields >100,000 distinct candidates (reachable with a large minified vendor.jsin project sources)assertCSSFileContent: TypeError for any scanned source file >16MBEither throw escapes
buildCandidateManifestbeforemanifestCache.set, so the failure re-runs the full project scan and re-throws on every request — one oversized tenant file takes down every render for the project, indefinitely.Fix
buildCandidateManifestnow degrades per-file: a file rejected by the admission caps is logged (warn) and skipped, the manifest still builds and caches, and the rest of the project renders with styles from its remaining files.Testing (red-green TDD)
Two new tests in
css-candidate-manifest.test.ts(per-cap degradation) fail on pre-fix src with the exact TypeErrors (adversarial revert-check), pass at HEAD (19 steps).Reviewer notes (from adversarial verification)
extractCandidateserror (including a future tokenizer bug) downgrades to warn+skip for that file — availability tradeoff at this seam; a real defect would show as silently-missing styles plus the warn log.candidate-extractor.tsaggregate cap remains live on other paths — out of scope here.Summary by CodeRabbit