refactor: remove read-many-files tool from agent

[abhipatel12]

Summary

Removes the read-many-files tool from the agent's allowed tools list to encourage the model to use parallel read-file calls instead. This change aims to test and improve the model's ability to handle multiple file reads efficiently using standard tools.

Details

• packages/core/src/config/config.ts: Removed ReadManyFilesTool registration.
• packages/core/src/core/prompts.ts: Updated system prompt to remove references to read-many-files and explicitly instruct the model to use parallel read-file calls for multiple files.
• packages/cli/src/ui/hooks/atCommandProcessor.ts: Updated to instantiate ReadManyFilesTool directly for @file processing, as it's no longer available in the tool registry.

Related Issues

N/A

How to Validate

1. Verify Tool Removal: Start the CLI and check that read-many-files is not listed in the available tools.
2. Verify Parallel Reads: Ask the agent to read multiple files (e.g., "read file1.ts and file2.ts") and observe if it issues parallel read-file calls.
3. Verify @file Processing: Run a command with @file (e.g., npm start -- "what is in @packages/core/src/config/config.ts?") and ensure it processes the file content correctly before sending to the model.

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

[gemini-code-assist]

Summary of Changes

Hello @abhipatel12, 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 refactors the agent's file reading mechanism by deprecating the dedicated read-many-files tool. The primary goal is to encourage the agent to leverage parallel read-file operations, which could lead to improved performance and more granular control over file access. The changes involve updating the tool registry, modifying the system prompt to guide the model's behavior, and adjusting the CLI's internal handling of @file commands.

Highlights

• Tool Removal: The read-many-files tool has been completely removed from the agent's allowed tools list, streamlining the available options for file reading.
• Model Instruction Update: The system prompt has been updated to explicitly instruct the model to use parallel read-file calls when multiple files need to be accessed, encouraging more efficient file handling.
• CLI @file Processing: The @file processing in the CLI now directly instantiates ReadManyFilesTool for its internal use, as it is no longer available via the general tool registry.

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[gemini-code-assist]

Code Review

This pull request refactors the agent to remove the read-many-files tool, encouraging the use of parallel read-file calls instead. The changes correctly remove the tool registration and update the system prompts. However, I've found a critical copy-paste error in the system prompt update, where a line is duplicated. This error is present in packages/core/src/core/prompts.ts and is reflected in multiple snapshots within packages/core/src/core/__snapshots__/prompts.test.ts.snap. This duplication could confuse the model and needs to be fixed. I've provided comments with suggestions for each occurrence.

[github-actions]

Size Change: +15 B (0%)

Total Size: 20.5 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	20.4 MB	+15 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

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