Changelogs for 0.27.0 and 0.28.0-preview0

[g-samroberts]

Summary

Changelogs for 0.27.0 and 0.28.0-preview0
Closes #18338

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 @g-samroberts, 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 updates the official changelog documentation for the Gemini CLI, incorporating the release notes for the stable v0.27.0 and the preview v0.28.0-preview.0 versions. The updates detail significant architectural shifts, such as the adoption of an event-driven scheduler, numerous user interface and experience enhancements, and advancements in agent and skill management. The preview release further refines hooks management, introduces new customization options for extensions, and improves user information display.

Highlights

• v0.27.0 Stable Release: The CLI now utilizes an event-driven scheduler for tool execution, significantly improving performance and responsiveness. This release also introduces a new 'Plan' mode, queued tool confirmations, and expandable large text pastes for an enhanced user experience. Agent Skills have been promoted to a stable feature, with sub-agents now using JSON schema for input and tracked by an 'AgentRegistry'. A new '/rewind' command allows users to navigate session history, and Linux clipboard support for image pasting on Wayland and X11 has been added.
• v0.28.0-preview.0 Preview Release: This preview release brings improved hooks management, aligning enable/disable functionality with skills and offering better completion. Extensions now support custom themes for greater personalization. User identity information (authentication, email, and tier) is displayed on startup and through the 'stats' command. Plan mode has been enhanced with a generic 'Checklist' component and refactored 'Todo' items. Additionally, support for background shell commands has been implemented.

Changelog

• docs/changelogs/index.md
  • Added a new 'Announcements: v0.27.0' section, detailing key features like event-driven architecture, enhanced UI/UX (Plan mode, queued confirmations, expandable text, '/rewind' command), and Linux clipboard support.
• docs/changelogs/latest.md
  • Updated the stable release version to v0.27.0 and its release date to February 3, 2026.
  • Completely revised the 'Highlights' section to reflect the new features and improvements introduced in v0.27.0.
  • Updated the 'What's Changed' list with a comprehensive set of new pull request entries for v0.27.0.
• docs/changelogs/preview.md
  • Updated the preview release version to v0.28.0-preview.0 and its release date to February 3, 2026.
  • Completely revised the 'Highlights' section to detail the new features in v0.28.0-preview.0, including hooks management improvements, custom themes for extensions, user identity display, Plan mode enhancements, and background shell commands.
  • Updated the 'What's Changed' list with a comprehensive set of new pull request entries for v0.28.0-preview.0.

Activity

• The pull request was created by g-samroberts.
• The changes primarily involve updating documentation files related to changelogs for upcoming releases.
• No specific reviewer comments or interactions are provided in the context.

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[github-actions]

Size Change: -2 B (0%)

Total Size: 23.7 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	23.7 MB	-2 B (0%)
./bundle/sandbox-macos-permissive-closed.sb	1.03 kB	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-closed.sb	3.29 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

_{compressed-size-action}

[gemini-code-assist]

Code Review

This pull request updates the changelogs for versions 0.27.0 and 0.28.0-preview0. The changes are mostly correct, but there is a significant formatting error in docs/changelogs/latest.md where the 'Full Changelog' link is broken. I've kept the original comment with a suggestion to fix it, as it does not conflict with any provided rules. The other files look good.

[g-samroberts]

/gemini review

[gemini-code-assist]

Code Review

This pull request updates the changelogs for versions 0.27.0 and 0.28.0-preview0. The changes include adding new release announcements, updating the latest stable and preview release files, and restructuring the documentation sidebar. The changes are well-contained within the documentation and appear correct. I have no specific feedback as the changes are documentation-related and do not contain any high or critical severity issues.