Changelog for v0.57.0

[gemini-cli-robot]

This PR contains the auto-generated changelog for the v0.57.0 release.

Please review and merge.

Related to #18505

[github-actions]

📊 PR Size: size/L

• Lines changed: 373
• Additions: +97
• Deletions: -276
• Files changed: 2

[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 introduces the official changelog for the v0.57.0 release. It captures a series of improvements focused on enhancing system resilience, refining evaluation diagnostics, and addressing various Terminal UI and subagent operational issues to improve the overall user experience.

Highlights

• Evaluation Validation & Formatting: Added new evaluation validation features, a tool call formatter, and integrated failure summaries to enhance behavioral evaluation diagnostics.
• Resilience & Capacity Error Mitigation: Implemented context-aware silent retries and availability TTL for capacity errors, and enabled full multi-turn request rollback upon cancellation or abort.
• Terminal UI & Subagent Operations: Added execution timeouts to prevent TUI hangs, resolved subagent handoff token regressions, and improved overall subagent output formatting.

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[gemini-code-assist]

Code Review

This pull request updates the project's changelog documentation to announce the release of version v0.57.0 on August 25, 2026. It adds release announcements to docs/changelogs/index.md and updates docs/changelogs/latest.md with new highlights—such as evaluation validation, resilience and capacity error mitigation, subagent operations, and terminal UI improvements—along with the list of merged pull requests. There are no review comments, and I have no feedback to provide.

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

[github-actions]

Size Change: -4 B (0%)

Total Size: 35.3 MB

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