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ci: rename the parser job to spec and run CSS, HTML and XML in one leg - #22870

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Oct 23, 2026
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@alexander-akait

@alexander-akait alexander-akait commented Oct 23, 2026 •

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Summary

The css, html and xml legs each run in 1–2 min, less than a runner's own setup. They now share one leg, spec (css-html-xml), which runs the three suites in a single Jest call. The job is renamed from parser to spec, since it also runs the minifier suites. None of its checks are required for merge.

Legs Runners per run
Before parser (css), (html), (js), (minify-corpora), (minify-fuzz), (xml) 6
After spec (css-html-xml), (js), (minify-corpora), (minify-fuzz) 4

The same suites still run on every PR. Coverage for the merged leg goes up under one css-html-xml flag, which replaces css-parsing, html5lib and xmlconf in codecov.yml. The per-suite test:/cover: scripts stay for local runs.

What kind of change does this PR introduce?

ci

Did you add tests for your changes?

No, CI configuration only. yarn cover:spec-css-html-xml --listTests lists exactly the three suites.

Does this PR introduce a breaking change?

No.

If relevant, what needs to be documented once your changes are merged or what have you already documented?

Updated the job names in TESTING_DOCS.md and docs/architecture.md.

Use of AI

Claude Code wrote the change on my request; I reviewed the plan before it was made.


Generated by Claude Code

Summary by CodeRabbit

  • Chores
    • Consolidated automated checks for CSS, HTML, and XML into a combined test run, with corresponding updates to CI coverage reporting.
  • Documentation
    • Updated testing and architecture documentation to reflect the revised test-run assignments.

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changeset-bot Bot commented Oct 23, 2026

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⚠️ No Changeset found

Latest commit: 30d988b

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

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Types Coverage

Coverage after merging ci/merge-spec-legs into main will be
99.28%
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This PR is packaged and the instant preview of its latest commit is available.

Install it locally:

  • npm
npm i -D webpack@https://pkg.pr.new/webpack@22870
  • yarn
yarn add -D webpack@https://pkg.pr.new/webpack@22870
  • pnpm
pnpm add -D webpack@https://pkg.pr.new/webpack@22870

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Generated code size

Comparing base (8c3cbd3) to head (30d988b). Merging this pull request will not change the code webpack generates.

What moved Tests Assets Gzip Raw Test edit
Changed, test untouched 0 0 — — —
Changed, test edited 0 0 — — —
New 0 0 — — —
Deleted 0 0 — — —
Unchanged — 9105 — — —

Read Changed, test untouched first: the test is byte-identical on both sides, so webpack generated the difference. Changed, test edited moved partly because the test did — Test edit is how many bytes the test gained, and a bundle that grew by less is not a regression. New and Deleted are whole files, not deltas — a new asset was created, not grown, so it reads gray (⚪ added) — and adding tests cannot bury a real change. Gzip decides, because that is what users download; raw is the tiebreak, and brotli and zstd are per asset below.

No asset changed size.

No runtime gained or lost a runtime module.

Built test/configCases with the defaults a user gets: 2279 test(s), 9105 asset(s), 101 emitted nothing.

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coderabbitai Bot commented Oct 23, 2026

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Review in Change Stack →

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info
⚙️ Run configuration
📥 Commits

Reviewing files that changed from the base of the PR and between 8c3cbd3 and 30d988b.

📒 Files selected for processing: 5
  • .github/workflows/test.yml
  • TESTING_DOCS.md
  • codecov.yml
  • docs/architecture.md
  • package.json

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 5 remain after this review.

📝 Walkthrough

The CI matrix renames parser to spec and combines CSS, HTML, and XML corpus coverage in one entry. Coverage configuration and documentation now reference the combined job and flag.

Changes: Spec corpus coverage

Layer / File(s) Summary
Combined spec coverage and references
.github/workflows/test.yml, package.json, codecov.yml, TESTING_DOCS.md, docs/architecture.md
The spec matrix combines CSS, HTML, and XML corpus runs and uses a combined coverage command and flag. The Jest cache and coverage dependency use the spec job name. Corpus documentation maps the affected corpora to the updated job names.

Suggested reviewers: hai-x

Priority: ⬇️ Low

Change: Other

Merge Risk: ⚪ Minimal · up to 30d98

The CI consolidation is ready to merge with no confirmed regression introduced by this change.

Pre-merge checks: Passed 3 · Inconclusive 1

Failed Failed checks: 1 inconclusive

Check name Status Explanation Resolution
Title check Inconclusive The title uses valid Conventional Commit syntax with the allowed type "ci" and accurately describes the CI job rename and suite merge. The branch prefix is not provided, so the required type-to-branch… Provide the branch name or confirm that its prefix is "ci".
Passed Passed checks: 3 passed
Check name Status Explanation
Description Check Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Linked Issues check Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check Passed Check skipped because no linked issues were found for this pull request.
Full details: Title check

Explanation

The title uses valid Conventional Commit syntax with the allowed type "ci" and accurately describes the CI job rename and suite merge. The branch prefix is not provided, so the required type-to-branch-prefix match cannot be verified.

Resolution

Provide the branch name or confirm that its prefix is "ci".

  • Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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@codspeed

codspeed Bot commented Oct 23, 2026

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Merging this PR will improve performance by 21.25%

2 warnings, 1 note

⚠️ 111 benchmarks are dominated by system calls

System calls cannot be simulated consistently and are left out of the measure. The reported value understates the real cost. Switch to the Walltime instrument to measure them.

Learn more about system calls

See affected benchmarks

⚠️ Base and head ran on different runner types

Some benchmarks with significant performance changes were compared across different runner types, so the changes might not come from the code. Run base and head on the same runner type, or use CodSpeed Macro Runners for more stable results.

Learn more about Macro Runners

Open the report in CodSpeed to investigate

ℹ️ 46 benchmarks have no flamegraph

The flamegraph wasn't generated: most of the time was spent in runtime internals, which would leave nothing useful to analyze.

See affected benchmarks

⚡ 1 improved benchmark
✅ 338 untouched benchmarks

Performance Changes

Mode Benchmark BASE HEAD Efficiency
⚡ Memory benchmark "json-modules", scenario '{"name":"mode-development","mode":"development"}' 381.6 KB 314.7 KB +21.25%

Tip

Curious why performance improved? Comment @codspeedbot explain why performance improved on this PR, or directly use the CodSpeed MCP with your agent.


Comparing ci/merge-spec-legs (30d988b) with main (8c3cbd3)

Open in CodSpeed

@alexander-akait
alexander-akait merged commit 4ffac8d into main Oct 23, 2026
70 checks passed
@alexander-akait
alexander-akait deleted the ci/merge-spec-legs branch October 23, 2026 11:33
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