docs(links): update docs-writer skill and fix broken link

[g-samroberts]

Summary

• Updated the 'docs-writer' skill to require checking for broken links to headers when a header is changed.

• Fixed a broken link in 'docs/cli/plan-mode.md' that was pointing to the extensions index page.

Related #21301

Pre-Merge Checklist

• Updated relevant documentation and README (if needed)
• Added/updated tests (if needed)
• Noted breaking changes (if any)
• Validated on required platforms/methods:
  • MacOS
    • npm run
    • npx
    • Docker
    • Podman
    • Seatbelt
  • Windows
    • npm run
    • npx
    • Docker
  • Linux
    • npm run
    • npx
    • Docker

[gemini-cli]

Hi @g-samroberts, thank you so much for your contribution to Gemini CLI! We really appreciate the time and effort you've put into this.

We're making some updates to our contribution process to improve how we track and review changes. Please take a moment to review our recent discussion post: Improving Our Contribution Process & Introducing New Guidelines.

Key Update: Starting January 26, 2026, the Gemini CLI project will require all pull requests to be associated with an existing issue. Any pull requests not linked to an issue by that date will be automatically closed.

Thank you for your understanding and for being a part of our community!

[gemini-cli]

Hi there! Thank you for your contribution to Gemini CLI.

To improve our contribution process and better track changes, we now require all pull requests to be associated with an existing issue, as announced in our recent discussion and as detailed in our CONTRIBUTING.md.

This pull request is being closed because it is not currently linked to an issue. Once you have updated the description of this PR to link an issue (e.g., by adding Fixes #123 or Related to #123), it will be automatically reopened.

How to link an issue:
Add a keyword followed by the issue number (e.g., Fixes #123) in the description of your pull request. For more details on supported keywords and how linking works, please refer to the GitHub Documentation on linking pull requests to issues.

Thank you for your understanding and for being a part of our community!

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the quality of documentation by addressing two key areas: improving the 'docs-writer' skill to proactively prevent broken links to headers, and rectifying an existing broken internal link within the plan-mode.md file. The changes ensure more robust and accurate documentation navigation.

Highlights

• Docs-writer skill update: The 'docs-writer' skill was updated to include a requirement for checking broken links to headers when a header is modified.
• Broken link fix: A broken link in 'docs/cli/plan-mode.md' that incorrectly pointed to the extensions index page was fixed.

Changelog

• docs/cli/plan-mode.md
  • Fixed a broken internal link for 'extensions' by removing 'index.md' from the path.

Ignored Files

• Ignored by pattern: .gemini/** (1)
  • .gemini/skills/docs-writer/SKILL.md

Activity

• No specific activity (comments, reviews, progress) has been provided in the context for this pull request.

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[gemini-code-assist]

Code Review

This pull request updates a link in the plan-mode.md documentation file. The pull request description also mentions an update to the 'docs-writer' skill, but this change is not included in the provided patch and could not be reviewed. I have reviewed the changes and found no issues of high or critical severity.

_{Note: Security Review has been skipped due to the limited scope of the PR.}

[gemini-cli]

Thank you for linking an issue! This pull request has been automatically reopened.

[github-actions]

Size Change: -2 B (0%)

Total Size: 26 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	25.5 MB	-2 B (0%)
./bundle/node_modules/@google/gemini-cli-devtools/dist/client/main.js	221 kB	0 B
./bundle/node_modules/@google/gemini-cli-devtools/dist/src/_client-assets.js	227 kB	0 B
./bundle/node_modules/@google/gemini-cli-devtools/dist/src/index.js	11.5 kB	0 B
./bundle/node_modules/@google/gemini-cli-devtools/dist/src/types.js	132 B	0 B
./bundle/sandbox-macos-permissive-open.sb	890 B	0 B
./bundle/sandbox-macos-permissive-proxied.sb	1.31 kB	0 B
./bundle/sandbox-macos-restrictive-open.sb	3.36 kB	0 B
./bundle/sandbox-macos-restrictive-proxied.sb	3.56 kB	0 B
./bundle/sandbox-macos-strict-open.sb	4.82 kB	0 B
./bundle/sandbox-macos-strict-proxied.sb	5.02 kB	0 B

_{compressed-size-action}