test: add assertion-driven SVG harness pilot - #141
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Organization UI Review profile: CHILL Plan: Advanced Run ID: 📒 Files selected for processing (5)
🚧 Files skipped from review as they are similar to previous changes (3)
Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. WalkthroughThe change adds an SVG assertion harness with strict manifest validation, bounded PNG decoding, exact comparisons, renderer execution, reports, pilot fixtures, developer commands, and CI verification. ChangesSVG assertion harness
Estimated code review effort: 4 (Complex) | ~45 minutes Sequence Diagram(s)sequenceDiagram
participant CLI
participant Runner
participant n0_CLI
participant CaptureWorker
participant Chromium
participant Report
CLI->>Runner: Provide manifest and output directory
Runner->>n0_CLI: Run strict and best-effort renders
Runner->>CaptureWorker: Start Chromium capture
CaptureWorker->>Chromium: Launch pinned browser and capture PNGs
CaptureWorker-->>Runner: Return Chromium observations
Runner->>Report: Evaluate comparisons and verdicts
Report-->>CLI: Write JSON, HTML, and gate status
Merge Risk: ⚪ Minimal · up to The assertion harness changes preserve failure diagnostics and avoid crashes when rendered images are unavailable. No actionable merge-blocking risk remains. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 19.44% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 36 functions across 7 files. (3 skipped: 3 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 3
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Inline comments:
In `@packages/grida-reftest/svg-assertions/runner.ts`:
- Around line 505-511: Update the pair comparison around observations[left] and
observations[right] to guard both images.get lookups before calling compare, so
missing decoded images are skipped without throwing. Also update the Chromium
sample-selection logic in image() to retain the first successful sample
consistently, while preserving the existing comparison and report-generation
flow.
- Line 450: Update the Chromium capture failure assignment around
execution.error, execution.stderr, execution.signal, and execution.exit so empty
stderr does not suppress later causes and nonzero exit codes are represented
when no error or signal is available. Preserve a meaningful failure message for
signal and exit-code failures, avoiding reports with empty or null causes.
In `@packages/grida-reftest/tsconfig.json`:
- Line 15: Update the tsconfig exclude setting to explicitly include both
"node_modules" and the existing "svg-assertions" entry, preserving the current
exclusion while preventing dependency sources from being discovered.
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ℹ️ Review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Advanced
Run ID: fcb5cd22-eaff-4201-9ee7-9840b8f6236d
⛔ Files ignored due to path filters (4)
fixtures/web-first/chromium/svg-upstream-resvg-rect-blue-control.pngis excluded by!**/*.pngfixtures/web-first/chromium/svg-upstream-resvg-rect-simple-case.pngis excluded by!**/*.pngfixtures/web-first/svg-upstream-resvg-rect-blue-control.svgis excluded by!**/*.svgfixtures/web-first/svg-upstream-resvg-rect-simple-case.svgis excluded by!**/*.svg
📒 Files selected for processing (21)
.github/workflows/consolidation-gates.ymlcrates/n0_cli/README.mddocs/wg/consolidation/svg-engine-of-record.mddocs/wg/consolidation/web-checklist.mdfixtures/web-first/LICENSE.resvgfixtures/web-first/README.mdfixtures/web-first/STATUS.mdfixtures/web-first/justfilefixtures/web-first/oracle-bake.jsonfixtures/web-first/primitives.jsonpackages/grida-reftest/svg-assertions/README.mdpackages/grida-reftest/svg-assertions/capture-worker.tspackages/grida-reftest/svg-assertions/cli.tspackages/grida-reftest/svg-assertions/model.test.tspackages/grida-reftest/svg-assertions/model.tspackages/grida-reftest/svg-assertions/pilot.jsonpackages/grida-reftest/svg-assertions/report.tspackages/grida-reftest/svg-assertions/runner.test.tspackages/grida-reftest/svg-assertions/runner.tspackages/grida-reftest/svg-assertions/tsconfig.jsonpackages/grida-reftest/tsconfig.json
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Why
Implements the owner-approved bounded pilot from gridaco/nothing#140. The audience is an engine contributor who needs a repeatable answer to a described SVG claim, without mistaking image similarity for feature support.
One claim receives PASS, FAIL, or UNRESOLVED. Undescribed inputs remain observations. Expected refusals have a separate assertion kind and never count as rendered support. Required missing/unresolved cases fail the job; there is no percentage, ranking, best-of-oracles selection, or conformance aggregate.
What changes
packages/grida-reftest/svg-assertions, using existing dependencies but no legacy scoring or renderer-routing code.cargo run -p n0_cli --bin n0in strict and best-effort modes, twice each; fresh Chromium through the unchanged sole hash-pinned capture module. New-only output directories, input/tool hashes, bounded processes, original PNGs, exact decoded-RGBA comparisons, diagnostics and repeated output.Measured verdict
The fresh Chromium green/blue control changes 160,000 pixels at maximum channel delta 255. Eight scratch actual-CLI renders (two admissions × two repeats × two sources) match their own Chromium capture exactly. This proves two scene assertions, not the full rectangle grammar.
Sensitivity was tested in the real renderer: temporarily mapping CSS green to blue at the solid-paint boundary made
just gatefail on the upstream rectangle, with the same 160,000-pixel / delta-255 difference. The new pilot failed that assertion while the blue and expected-refusal assertions remained passing. The renderer source was restored byte-for-byte and the original gates/status rerun green. No engine mutation is in the PR.An accidental concurrent Cargo test run caused a render timeout in one exploratory run; it was preserved as FAIL, not passed or overwritten. A preliminary run also caught tool-file drift and became UNRESOLVED. These are failed instrument runs, not positive compatibility evidence.
Verification
Completed locally: full relevant Rust tests (websem, n0_cli, n0, n0-model,
rframe, cg, animation-sampling, textlayout, including doctests),
cargo fmt --all, strictcargo clippy --no-deps -- -D warnings, Node formatting/lint,both TypeScript projects, and 40 assertion-tool contract tests. A deliberately
empty test selection exits 1 with the required CI invocation.
The independent reproducer renewed the shared-harness probe (eight CLI renders
exact; green/blue 160,000 pixels / delta 255), reran every
just gatecomponentand
just statusgreen without further STATUS diff, checked all source/oraclehashes, and confirmed all 1,537 old oracle bytes and records unchanged.
Review found two API-contract defects in this new instrument: pngjs normalizes
hidden RGB for non-palette tRNS and accepts a replacement IHDR after our first
dimension check. Both are fixed at the decoder boundary, with direct PNG-byte
regressions: full bounded framing/CRC/header validation precedes allocation;
lossy or unbounded encodings explicitly refuse; indexed-palette transparency
remains exact. Review also prompted case-local decoded buffers and bounded
control reloads, root/test-config CI scope, and failure on zero discovered tests.
This stops at the decoder/API boundary because it is the shared cause, not a
pixel-tolerance workaround. A follow-up review also exposed permissive
decompression (missing/checksum-bad streams or short rows could invent pixels)
and blocking FIFO opens: native bounded strict decompression, exact stream/row
length checks, and nonblocking descriptor validation now guard those cases.
No dependency implementation was patched.
The renewed actual-CLI run after review fixes exits 0 on the current tool identities: both
render-exact assertions and the separate expected-refusal assertion PASS, with
no integrity failures. The reproducer checked image records and named pairs
against original bytes. Stored green PNG matches Chromium/n0; fresh resvg's
rectangle difference remains 990 pixels at maximum channel delta 1, visibly
recorded without a tolerance or alternate-oracle pass. No existing oracle was
changed. This is per-assertion evidence, not an aggregate conformance result.
The local browser policy blocked opening the HTML viewer, so no interactive
browser UI verification is claimed. The static report data, images and escaping
tests were verified separately.
The saved
.agents/workflows/verify-rung.jsWorkflow runner is not exposed inthis environment. Independent TICK/LAW and REPRO roles ran by hand. Two TICK/LAW
audits found the issues addressed above; all must_fix/should_fix findings were
implemented with regressions. A final TICK/LAW attempt was blocked by a
tool-policy error, so no final independent TICK/LAW approval is claimed. The
ordinary independent REPRO verdict is PASS on the implementation before the three PR-review follow-ups below; those follow-ups have renewed local typechecks, all 40 contract tests, and an actual-CLI pilot PASS on their current tool identities.
This is not a claim that the Workflow ran.
PR review follow-ups
Commit 3e2233e addresses all three inline findings: partial Chromium captures retain positional repeat slots and guard decoded-image lookups, empty stderr cannot suppress signal/exit failure causes, and the parent TypeScript config preserves the node_modules exclusion. Three focused regressions cover these capture branches. The setup example now creates the output parent explicitly. No renderer, capture posture, oracle, or tolerance changed.
CI build diagnosis and corrections
Hosted failures were retained and diagnosed, not passed:
Local formatting/lint, typechecks, all 40 contract tests, and the actual-CLI pilot pass after the cold-build-budget change. The out-of-repository report placement was also exercised locally. Final-head hosted verification is now complete: all four GitHub Actions workflows pass on d60db34. The seam job records 40 passing contract tests, PASS for resvg-rect-green and resvg-rect-blue as render-exact assertions, PASS for geometry-unit-refusal as a refusal assertion, and a successfully uploaded immutable report. The active PR-check watcher exited 0; all three review threads remain resolved.
CodeRabbit reviewed the implementation fixes through 3e2233e without further actionable findings; all three earlier threads are resolved. Further automated review of the CI/build follow-ups was rate-limited, so no bot review of those final edits is claimed. The independent-role and interactive-viewer limitations above remain explicit.
Boundaries
The primitive corpus grows from 1,537 to 1,539. Refusal rows remain 351; sampled frames remain 16; exact text cells remain 16; artifact-geometry witnesses remain eight. No checklist tick, existing oracle overwrite, capture change, new tolerance, FLIP decision, renderer fix, or legacy-tool retirement. The broad scratch resvg survey remains measured, not celled, outside these promoted controls. Wider resource/font/export profiles and legacy succession remain follow-ups under the proposal.