fix(patch): cherry-pick f47d6c6 to release/v0.54.0-preview.0-pr-28566 to patch version v0.54.0-preview.0 and create version 0.54.0-preview.1

[gemini-cli-robot]

This PR automatically cherry-picks commit f47d6c6 to patch version v0.54.0-preview.0 in the preview release to create version 0.54.0-preview.1.

[github-actions]

📊 PR Size: size/XL

• Lines changed: 2441
• Additions: +2359
• Deletions: -82
• Files changed: 30

[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 comprehensive improvements to how the CLI handles stream errors and model-side failures. By categorizing and explicitly handling various InvalidStream scenarios—such as safety blocks, token limit exhaustion, and empty responses—the system now provides clearer feedback and maintains better state consistency. Additionally, the PR includes telemetry updates for tracking these errors and refined prompt instructions to guide the model toward more reliable tool usage and response generation.

Highlights

• Improved Error Handling: Enhanced handling of InvalidStream events across the CLI and core packages, ensuring that model-side errors like safety blocks and token limits are managed gracefully.
• Telemetry Enhancements: Added semantic validation error tracking to telemetry, allowing for better monitoring of model response failures.
• History Management: Implemented robust history rollback logic to ensure the chat state remains consistent when stream errors occur.
• Prompt Guidelines: Updated system prompts to include strict rules for tool execution and post-edit responses to improve model reliability.

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[github-actions]

Size Change: +14.3 kB (+0.04%)

Total Size: 35.2 MB

Filename	Size	Change
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./bundle/oauth2-provider-MPS34XTW.js	9.12 kB	+9.12 kB (new file)	🆕

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[gemini-code-assist]

Code Review

This pull request enhances the CLI and core packages with robust handling of invalid stream events, context-aware retries with on-retry nudging, and rollback mechanisms to revert un-responded user turns upon stream failures or aborts. It also updates prompt guidelines, scheduler cancellation behavior, and telemetry tracking. Feedback highlights three critical issues: a potential TypeError when accessing toolCall.response.responseParts on cancelled tool calls, the need to support Content objects in the systemInstruction retry nudge logic, and the necessity of cancelling and finalizing all active non-terminal calls in the scheduler when aborted.

[github-actions]

✅ 70 tests passed successfully on gemini-3-flash-preview.

🧠 Model Steering Guidance

This PR modifies files that affect the model's behavior (prompts, tools, or instructions).

• ⚠️ Consider adding Evals: No behavioral evaluations (evals/*.eval.ts) were added or updated in this PR. Consider adding a test case to verify the new behavior and prevent regressions.
• 🚀 Maintainer Reminder: Please ensure that these changes do not regress results on benchmark evals before merging.

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This is an automated guidance message triggered by steering logic signatures.