feat(core): introduce remote agent infrastructure and rename local executor

[adamfweidman]

Summary

Introduces initial infrastructure for remote agents and refactors the registry/executor to support remote agent definitions.

Details

• Renames AgentExecutor to LocalAgentExecutor and SubagentInvocation to LocalSubagentInvocation to clarify their scope.
• Introduces a RemoteAgentInvocation class to handle calling remote agents (implementation to follow).
• Refactors AgentDefinition in types.ts into a discriminated union (kind: 'local' | 'remote').
• Updates SubagentToolWrapper to factory the correct invocation strategy based on the agent's kind.
• delegate-to-agent now calls generic SubagentToolWrapper rather than SubagentInvocation

Related Issues

Fixes: https://github.com/google-gemini/gemini-cli/issues/15093

How to Validate

npm run preflight

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
    • [x] npm run
    • [ ] npx
    • [ ] Docker
    • [ ] Podman
    • [ ] Seatbelt
  • [ ] Windows
    • [ ] npm run
    • [ ] npx
    • [ ] Docker
  • [ ] Linux
    • [ ] npm run
    • [ ] npx
    • [ ] Docker

[gemini-code-assist[bot]]

Summary of Changes

Hello @adamfweidman, I'm Gemini Code Assist[^1]! 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 significantly enhances the agent system by introducing the initial framework for remote agent support and clarifying the architecture of local agents. By refactoring core components like the agent executor and invocation classes, and by introducing a discriminated union for agent definitions, the system is now better equipped to integrate and manage both local and remote agent functionalities. This change is a crucial step towards enabling more flexible and distributed agent-to-agent interactions.

Highlights

• Remote Agent Infrastructure: Introduced the foundational infrastructure for supporting remote agents, including a new RemoteAgentInvocation class to handle calls to these agents. This lays the groundwork for future distributed agent capabilities.
• Local Executor Refactoring: The existing AgentExecutor and SubagentInvocation classes have been renamed to LocalAgentExecutor and LocalSubagentInvocation respectively. This clarifies their scope and distinguishes them from the newly introduced remote agent components.
• Discriminated Agent Definitions: The AgentDefinition type has been refactored into a discriminated union, allowing agents to be explicitly defined as either local or remote using a kind property. This enables type-safe handling of different agent types.
• Dynamic Invocation Strategy: The SubagentToolWrapper has been updated to dynamically select the appropriate invocation strategy (LocalSubagentInvocation or RemoteAgentInvocation) based on the kind property of the AgentDefinition, centralizing the logic for handling both local and remote agent calls.

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[github-actions[bot]]

Size Change: +4.5 kB (+0.02%)

Total Size: 22 MB

Filename	Size	Change
./bundle/gemini.js	22 MB	+4.5 kB (+0.02%)

ℹ️ View Unchanged

Filename	Size
./bundle/sandbox-macos-permissive-closed.sb	1.03 kB
./bundle/sandbox-macos-permissive-open.sb	890 B
./bundle/sandbox-macos-permissive-proxied.sb	1.31 kB
./bundle/sandbox-macos-restrictive-closed.sb	3.29 kB
./bundle/sandbox-macos-restrictive-open.sb	3.36 kB
./bundle/sandbox-macos-restrictive-proxied.sb	3.56 kB

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