fix(patch): cherry-pick edbe548 to release/v0.21.0-preview.4-pr-15007 to patch version v0.21.0-preview.4 and create version 0.21.0-preview.5

[gemini-cli-robot]

This PR automatically cherry-picks commit edbe548 to patch version v0.21.0-preview.4 in the preview release to create version 0.21.0-preview.5.

[gemini-code-assist]

Summary of Changes

Hello @gemini-cli-robot, 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 automates the cherry-picking of a specific commit to update a preview release. The primary change involves modifying a read-only policy configuration to reflect a new tool name, ensuring that the system correctly recognizes and allows the updated invocation method. This helps maintain consistency and functionality within the preview environment.

Highlights

• Policy Update: The read-only.toml policy file has been updated to change the allowed toolName from codebase_investigator to SubagentInvocation.
• Automated Cherry-Pick: This pull request is an automated cherry-pick of commit edbe548 to patch the v0.21.0-preview.4 release, creating v0.21.0-preview.5.

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[gemini-code-assist]

Code Review

This pull request updates a policy rule in read-only.toml by replacing the specific tool name codebase_investigator with the generic SubagentInvocation. This change introduces a critical security vulnerability. The new rule is overly permissive, as it would allow any subagent, including those with write capabilities, to execute without user confirmation under a policy intended only for read-only tools. This fundamentally undermines the safety mechanism provided by the policy.

[github-actions]

Size Change: -2 B (0%)

Total Size: 21.6 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	21.6 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}