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Fix stylelint CI failure caused by missing balanced-match dependency#2989

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Feb 26, 2026
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Fix stylelint CI failure caused by missing balanced-match dependency#2989
llastflowers merged 2 commits intocopilot/fix-stylelint-workflowfrom
copilot/fix-stylelint-workflow-failure

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Copilot AI commented Feb 26, 2026 •
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What are you trying to accomplish?

stylelint@17.3.0 introduced functionArgumentsSearch.mjs which imports balanced-match, but balanced-match was never recorded in package-lock.json as a stylelint dependency. npm ci in CI installs exactly what's in the lock file, so balanced-match was never present where stylelint could resolve it, causing the workflow to fail with ERR_MODULE_NOT_FOUND.

What approach did you choose and why?

Ran npm update stylelint, which bumped the lock file to stylelint@17.4.0. That version dropped balanced-match as a dependency entirely, resolving the issue with a minimal 4-line change to package-lock.json.

What should reviewers focus on?

Only package-lock.json changes — stylelint bumped from 17.3.0 → 17.4.0 and @csstools/css-syntax-patches-for-csstree from ^1.0.26 → ^1.0.27 (a transitive dep update from stylelint).

Can these changes ship as is?

  • Yes, this PR does not depend on additional changes. 🚢
Original prompt

Fix the failing GitHub Actions workflow "CI / stylelint (pull_request)".
Analyze the workflow logs, identify the root cause of the failure, and implement a fix.
Job ID: 65054332192
Job URL: /primer/css/actions/runs/22460824518/job/65054332192?pr=2988

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

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changeset-bot Bot commented Feb 26, 2026 •
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⚠️ No Changeset found

Latest commit: ac2725a

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.

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@llastflowers
Fix stylelint CI failure: update package-lock.json to use stylelint@1…
ac2725a 
…7.4.0

Co-authored-by: llastflowers <55068883+llastflowers@users.noreply.github.com>
Copilot AI changed the title [WIP] Fix failing GitHub Actions workflow for stylelint Fix stylelint CI failure caused by missing balanced-match dependency Feb 26, 2026
@llastflowers llastflowers marked this pull request as ready for review February 26, 2026 21:02
@llastflowers llastflowers requested review from a team as code owners February 26, 2026 21:02
@github-actions github-actions Bot temporarily deployed to Storybook Preview February 26, 2026 21:03 Inactive
@llastflowers llastflowers merged commit 47be475 into copilot/fix-stylelint-workflow Feb 26, 2026
17 of 18 checks passed
@llastflowers llastflowers deleted the copilot/fix-stylelint-workflow-failure branch February 26, 2026 21:22
llastflowers added a commit that referenced this pull request Feb 26, 2026
@dependabot @llastflowers
Fix failing stylelint CI workflow (#2988)
04db7f4 
* Bump the all group across 1 directory with 8 updates

Bumps the all group with 8 updates in the / directory:

| Package | From | To |
| --- | --- | --- |
| [@primer/primitives](https://github.com/primer/primitives) | `11.3.2` | `11.4.0` |
| [@primer/stylelint-config](https://github.com/primer/stylelint-config) | `13.4.1` | `13.4.2` |
| [autoprefixer](https://github.com/postcss/autoprefixer) | `10.4.23` | `10.4.24` |
| [eslint](https://github.com/eslint/eslint) | `9.39.2` | `10.0.0` |
| [eslint-plugin-jest](https://github.com/jest-community/eslint-plugin-jest) | `29.12.1` | `29.15.0` |
| [globby](https://github.com/sindresorhus/globby) | `16.1.0` | `16.1.1` |
| [semver](https://github.com/npm/node-semver) | `7.7.3` | `7.7.4` |
| [stylelint](https://github.com/stylelint/stylelint) | `17.0.0` | `17.3.0` |



Updates `@primer/primitives` from 11.3.2 to 11.4.0
- [Release notes](https://github.com/primer/primitives/releases)
- [Changelog](https://github.com/primer/primitives/blob/main/CHANGELOG.md)
- [Commits](primer/primitives@v11.3.2...v11.4.0)

Updates `@primer/stylelint-config` from 13.4.1 to 13.4.2
- [Release notes](https://github.com/primer/stylelint-config/releases)
- [Changelog](https://github.com/primer/stylelint-config/blob/main/CHANGELOG.md)
- [Commits](primer/stylelint-config@v13.4.1...v13.4.2)

Updates `autoprefixer` from 10.4.23 to 10.4.24
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.23...10.4.24)

Updates `eslint` from 9.39.2 to 10.0.0
- [Release notes](https://github.com/eslint/eslint/releases)
- [Commits](eslint/eslint@v9.39.2...v10.0.0)

Updates `eslint-plugin-jest` from 29.12.1 to 29.15.0
- [Release notes](https://github.com/jest-community/eslint-plugin-jest/releases)
- [Changelog](https://github.com/jest-community/eslint-plugin-jest/blob/main/CHANGELOG.md)
- [Commits](jest-community/eslint-plugin-jest@v29.12.1...v29.15.0)

Updates `globby` from 16.1.0 to 16.1.1
- [Release notes](https://github.com/sindresorhus/globby/releases)
- [Commits](sindresorhus/globby@v16.1.0...v16.1.1)

Updates `semver` from 7.7.3 to 7.7.4
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/main/CHANGELOG.md)
- [Commits](npm/node-semver@v7.7.3...v7.7.4)

Updates `stylelint` from 17.0.0 to 17.3.0
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@17.0.0...17.3.0)

---
updated-dependencies:
- dependency-name: "@primer/primitives"
  dependency-version: 11.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
- dependency-name: "@primer/stylelint-config"
  dependency-version: 13.4.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: autoprefixer
  dependency-version: 10.4.24
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: eslint
  dependency-version: 10.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: all
- dependency-name: eslint-plugin-jest
  dependency-version: 29.15.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
- dependency-name: globby
  dependency-version: 16.1.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: semver
  dependency-version: 7.7.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: stylelint
  dependency-version: 17.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
...

Signed-off-by: dependabot[bot] <support@github.com>

* Initial plan

* Fix all stylelint errors causing CI workflow failure

Co-authored-by: llastflowers <55068883+llastflowers@users.noreply.github.com>

* Fix stylelint CI failure caused by missing `balanced-match` dependency (#2989)

* Initial plan

* Fix stylelint CI failure: update package-lock.json to use stylelint@17.4.0

Co-authored-by: llastflowers <55068883+llastflowers@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: llastflowers <55068883+llastflowers@users.noreply.github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Brittany L. Houtz <55068883+llastflowers@users.noreply.github.com>
llastflowers added a commit that referenced this pull request Feb 26, 2026
@dependabot @llastflowers
Bump the all group across 1 directory with 8 updates (#2984)
a6cae03 
* Bump the all group across 1 directory with 8 updates

Bumps the all group with 8 updates in the / directory:

| Package | From | To |
| --- | --- | --- |
| [@primer/primitives](https://github.com/primer/primitives) | `11.3.2` | `11.4.0` |
| [@primer/stylelint-config](https://github.com/primer/stylelint-config) | `13.4.1` | `13.4.2` |
| [autoprefixer](https://github.com/postcss/autoprefixer) | `10.4.23` | `10.4.24` |
| [eslint](https://github.com/eslint/eslint) | `9.39.2` | `10.0.0` |
| [eslint-plugin-jest](https://github.com/jest-community/eslint-plugin-jest) | `29.12.1` | `29.15.0` |
| [globby](https://github.com/sindresorhus/globby) | `16.1.0` | `16.1.1` |
| [semver](https://github.com/npm/node-semver) | `7.7.3` | `7.7.4` |
| [stylelint](https://github.com/stylelint/stylelint) | `17.0.0` | `17.3.0` |



Updates `@primer/primitives` from 11.3.2 to 11.4.0
- [Release notes](https://github.com/primer/primitives/releases)
- [Changelog](https://github.com/primer/primitives/blob/main/CHANGELOG.md)
- [Commits](primer/primitives@v11.3.2...v11.4.0)

Updates `@primer/stylelint-config` from 13.4.1 to 13.4.2
- [Release notes](https://github.com/primer/stylelint-config/releases)
- [Changelog](https://github.com/primer/stylelint-config/blob/main/CHANGELOG.md)
- [Commits](primer/stylelint-config@v13.4.1...v13.4.2)

Updates `autoprefixer` from 10.4.23 to 10.4.24
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.23...10.4.24)

Updates `eslint` from 9.39.2 to 10.0.0
- [Release notes](https://github.com/eslint/eslint/releases)
- [Commits](eslint/eslint@v9.39.2...v10.0.0)

Updates `eslint-plugin-jest` from 29.12.1 to 29.15.0
- [Release notes](https://github.com/jest-community/eslint-plugin-jest/releases)
- [Changelog](https://github.com/jest-community/eslint-plugin-jest/blob/main/CHANGELOG.md)
- [Commits](jest-community/eslint-plugin-jest@v29.12.1...v29.15.0)

Updates `globby` from 16.1.0 to 16.1.1
- [Release notes](https://github.com/sindresorhus/globby/releases)
- [Commits](sindresorhus/globby@v16.1.0...v16.1.1)

Updates `semver` from 7.7.3 to 7.7.4
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/main/CHANGELOG.md)
- [Commits](npm/node-semver@v7.7.3...v7.7.4)

Updates `stylelint` from 17.0.0 to 17.3.0
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@17.0.0...17.3.0)

---
updated-dependencies:
- dependency-name: "@primer/primitives"
  dependency-version: 11.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
- dependency-name: "@primer/stylelint-config"
  dependency-version: 13.4.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: autoprefixer
  dependency-version: 10.4.24
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: eslint
  dependency-version: 10.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: all
- dependency-name: eslint-plugin-jest
  dependency-version: 29.15.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
- dependency-name: globby
  dependency-version: 16.1.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: semver
  dependency-version: 7.7.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: stylelint
  dependency-version: 17.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix failing stylelint CI workflow (#2988)

* Bump the all group across 1 directory with 8 updates

Bumps the all group with 8 updates in the / directory:

| Package | From | To |
| --- | --- | --- |
| [@primer/primitives](https://github.com/primer/primitives) | `11.3.2` | `11.4.0` |
| [@primer/stylelint-config](https://github.com/primer/stylelint-config) | `13.4.1` | `13.4.2` |
| [autoprefixer](https://github.com/postcss/autoprefixer) | `10.4.23` | `10.4.24` |
| [eslint](https://github.com/eslint/eslint) | `9.39.2` | `10.0.0` |
| [eslint-plugin-jest](https://github.com/jest-community/eslint-plugin-jest) | `29.12.1` | `29.15.0` |
| [globby](https://github.com/sindresorhus/globby) | `16.1.0` | `16.1.1` |
| [semver](https://github.com/npm/node-semver) | `7.7.3` | `7.7.4` |
| [stylelint](https://github.com/stylelint/stylelint) | `17.0.0` | `17.3.0` |



Updates `@primer/primitives` from 11.3.2 to 11.4.0
- [Release notes](https://github.com/primer/primitives/releases)
- [Changelog](https://github.com/primer/primitives/blob/main/CHANGELOG.md)
- [Commits](primer/primitives@v11.3.2...v11.4.0)

Updates `@primer/stylelint-config` from 13.4.1 to 13.4.2
- [Release notes](https://github.com/primer/stylelint-config/releases)
- [Changelog](https://github.com/primer/stylelint-config/blob/main/CHANGELOG.md)
- [Commits](primer/stylelint-config@v13.4.1...v13.4.2)

Updates `autoprefixer` from 10.4.23 to 10.4.24
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.4.23...10.4.24)

Updates `eslint` from 9.39.2 to 10.0.0
- [Release notes](https://github.com/eslint/eslint/releases)
- [Commits](eslint/eslint@v9.39.2...v10.0.0)

Updates `eslint-plugin-jest` from 29.12.1 to 29.15.0
- [Release notes](https://github.com/jest-community/eslint-plugin-jest/releases)
- [Changelog](https://github.com/jest-community/eslint-plugin-jest/blob/main/CHANGELOG.md)
- [Commits](jest-community/eslint-plugin-jest@v29.12.1...v29.15.0)

Updates `globby` from 16.1.0 to 16.1.1
- [Release notes](https://github.com/sindresorhus/globby/releases)
- [Commits](sindresorhus/globby@v16.1.0...v16.1.1)

Updates `semver` from 7.7.3 to 7.7.4
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/main/CHANGELOG.md)
- [Commits](npm/node-semver@v7.7.3...v7.7.4)

Updates `stylelint` from 17.0.0 to 17.3.0
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/main/CHANGELOG.md)
- [Commits](stylelint/stylelint@17.0.0...17.3.0)

---
updated-dependencies:
- dependency-name: "@primer/primitives"
  dependency-version: 11.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
- dependency-name: "@primer/stylelint-config"
  dependency-version: 13.4.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: autoprefixer
  dependency-version: 10.4.24
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: eslint
  dependency-version: 10.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: all
- dependency-name: eslint-plugin-jest
  dependency-version: 29.15.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
- dependency-name: globby
  dependency-version: 16.1.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: semver
  dependency-version: 7.7.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: all
- dependency-name: stylelint
  dependency-version: 17.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all
...

Signed-off-by: dependabot[bot] <support@github.com>

* Initial plan

* Fix all stylelint errors causing CI workflow failure

Co-authored-by: llastflowers <55068883+llastflowers@users.noreply.github.com>

* Fix stylelint CI failure caused by missing `balanced-match` dependency (#2989)

* Initial plan

* Fix stylelint CI failure: update package-lock.json to use stylelint@17.4.0

Co-authored-by: llastflowers <55068883+llastflowers@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: llastflowers <55068883+llastflowers@users.noreply.github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Brittany L. Houtz <55068883+llastflowers@users.noreply.github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Brittany L. Houtz <55068883+llastflowers@users.noreply.github.com>
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