add custom image for claude for ACP

[benoitf]

Task content

ACP is not possible on the default base image as the ACP part is a separate package

Install this in a new image and then extend the agent including this base image

[fullsend-ai-triage]

🤖 Finished Triage · ✅ Success · Started 4:22 PM UTC · Completed 4:28 PM UTC
Commit: d8f1e68 · View workflow run →

[fullsend-ai-triage]

Triage Summary

Category: Feature — add ACP support to the Claude agent

Problem: The Claude agent currently cannot use ACP because (1) the default sandbox base image does not include the ACP package, and (2) the Claude agent registration does not set acp or baseImage fields.

Recommended approach:

1. Create a custom container image — Build a new image that extends the default base image with the ACP package installed.
2. Update the Claude agent registration — In extensions/claude/src/claude-extension.ts, add baseImage (pointing to the custom image) and acp: { args: ['acp'] } to the agents.registerAgent() call, following the same pattern used by goose and openclaw agents.
3. Update tests — Ensure the agent registration tests verify the new acp and baseImage fields.

Reference implementations:

• extensions/goose/src/extension.ts — uses acp: { args: ['acp'] }
• extensions/openclaw/src/extension.ts — uses acp: { args: ['acp'] }
• The Agent interface in the extension API already supports both baseImage?: string and acp?: AcpConfiguration

Related issues: This is part of the broader ACP support epic (#1934) and the custom image integration epic (#2526). A similar task exists for the goose agent (#2527).

Proposed test:

test('should register agent with ACP configuration and custom base image', () => {
  // Verify the registerAgent call includes:
  // - acp: { args: ['acp'] }
  // - baseImage: '<expected-custom-image-url>'
  const registerCall = vi.mocked(agents.registerAgent).mock.calls[0][0];
  expect(registerCall.acp).toEqual({ args: ['acp'] });
  expect(registerCall.baseImage).toBeDefined();
  expect(registerCall.baseImage).not.toBe('');
});

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Labels: This is a feature request related to the agentic workspace area (custom agent images and ACP support), matching the existing area/agentic-workspace label used on related issues #2526 and #2527.

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Next steps:

• /fs-code — agent creates a PR to implement this issue
• /fs-code <your instruction> — agent implements with your specific guidance