Ignore local .agents workspaces

[Copilot]

Closes #

Changelog

New

N/A

Changed

• Added .agents to repo-level ignore coverage for Git, Prettier, ESLint, Stylelint, and Markdown lint so local agent workspaces are excluded from globbed tooling.

Removed

N/A

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; config-only tooling change with no published package impact.

Testing & Reviewing

• Baseline validation passed before edits: npm install, npm run build, npm test -- --run, npm run type-check, npm run lint, npm run lint:css, npm run format:diff
• Verified .agents/check/* files are ignored by Git, Prettier, ESLint, Stylelint, and Markdown lint globs.
• Final validation passed: npm run build, npm test -- --run, npm run type-check, npm run lint, npm run lint:css, npm run format:diff
• Secret scanning passed for changed files.
• Parallel validation passed with no review comments and no CodeQL-analyzable code changes.

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github-ui (Learn more about how to run integration tests)

[changeset-bot]

⚠️ No Changeset found

Latest commit: fb6b61e

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

[Copilot]

Pull request overview

Updates repository-wide tooling configuration to consistently ignore local .agents workspaces, preventing agent-generated scratch files from being picked up by formatting/linting and from being committed.

Changes:

• Added .agents to Git ignore rules.
• Excluded .agents from Prettier, ESLint, Stylelint, and Markdownlint file globs/ignore lists.
• Kept existing ignore patterns consistent with current repo scripting and config structure.

Show a summary per file

File	Description
package.json	Excludes .agents from the lint:md markdownlint-cli2 glob inputs.
eslint.config.mjs	Adds .agents/**/* to ESLint flat config globalIgnores.
.stylelintignore	Ignores CSS files under .agents for Stylelint runs.
.prettierignore	Ignores .agents directory for Prettier formatting/checks.
.gitignore	Prevents .agents workspace contents from being tracked by Git.

Copilot's findings

• Files reviewed: 4/5 changed files
• Comments generated: 0