ci: shard Vitest suite

[stipsan]

Summary

• run the complete Vitest suite in four parallel GitHub Actions shards
• collect V8 coverage from each shard and merge the blob reports
• post merged coverage results as a pull request comment
• require the shard matrix to succeed before the aggregate test check passes
• ignore locally generated Vitest blob reports

Testing

• pnpm install --frozen-lockfile
• pnpm lint
• pnpm knip
• pnpm build (Node 22.22.2)
• all four coverage-enabled Vitest shards
• pnpm vitest run --merge-reports --coverage (167 files and 893 tests)
• actionlint .github/workflows/ci.yml
• GitHub Actions run 29404888837: all shards, aggregate test check, and coverage report passed
• verified the coverage report comment posted successfully

vitest_coverage_comment_validation.md

_{To show artifacts inline, enable in settings.}

  

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
plugins-studio	Ready	Preview, Comment	Jul 15, 2026 8:53pm

[changeset-bot]

⚠️ No Changeset found

Latest commit: 8482351

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

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​@​vitest/​coverage-v8@​4.1.10
	github/​actions/​download-artifact@​3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c
	github/​actions/​upload-artifact@​043fb46d1a93c77aae656e7c1c64a875d1fc6a0a
	github/​davelosert/​vitest-coverage-report-action@​3c054a2d2e2ca45446417ad5d6d5eb33092af8f1

View full report

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	27.08%	4238 / 15649
🔵	Statements	26.71%	4432 / 16589
🔵	Functions	22.34%	1048 / 4690
🔵	Branches	17.51%	1914 / 10929

File Coverage

No changed files found.

Generated in workflow #7427 for commit 8482351 by the Vitest Coverage Report Action

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 043397e. Configure here.}

[Copilot]

Pull request overview

This PR updates the repository’s CI pipeline to run the Vitest suite in parallel shards, collect per-shard blob reports with V8 coverage, and merge/post consolidated coverage results on pull requests while preserving a single aggregate test status check.

Changes:

• Shard the Vitest CI run into 4 parallel jobs and add an aggregate test job.
• Enable V8 coverage and add @vitest/coverage-v8, plus ignore generated .vitest-reports/.
• Add a PR-only coverage merge step and post coverage results as a PR comment.

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
.github/workflows/ci.yml	Replace single test job with 4 sharded runs, upload blob artifacts, add aggregate test check, and merge/report coverage on PRs.
vitest.config.ts	Configure Vitest coverage provider/reporters for consolidated coverage output.
package.json	Add @vitest/coverage-v8 to devDependencies (catalog).
pnpm-workspace.yaml	Add @vitest/coverage-v8 to the workspace catalog.
pnpm-lock.yaml	Lockfile updates for @vitest/coverage-v8 and its transitive deps.
.gitignore	Ignore .vitest-reports generated by Vitest blob reporting.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.