[FEATURE]: Claude support using ACP protocol

[jcubic]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

I just installed Agent-Shell for Emacs that allows using Claude Code subscription via Agent Client Protocol and @agentclientprotocol/claude-agent-acp

Anthropic is blocking 3rd-party tools, but only if you hook directly to their API endpoints used by Claude Code. This looks like a way to do this "legally".

ACP is already part of OpenCode, you only need to make it run as a client and spawn claude-agent-acp as a subprocess.

[github-actions]

This issue doesn't fully meet our contributing guidelines.

What needs to be fixed:

• The description contains an AI-generated wall of text (the issue itself states it was "created with Claude Opus 4.7"). Long AI-generated write-ups are not acceptable — please replace this with a concise, human-written description of the feature you are requesting and the problem it solves.

Please edit this issue to address the above within 2 hours, or it will be automatically closed.

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This issue might be a duplicate of existing issues. Please check:

• [FEATURE]: TUI as an ACP Client #5182: Directly requests OpenCode TUI as an ACP client (same core ask)
• [FEATURE]: First-class Claude Code bridge / external runtime support for Claude models #20002: Requests first-class Claude Code bridge / external runtime for Claude Pro/Max access
• [FEATURE]: Support for using Web/Desktop Client as ACP Client #18106: Requests Web/Desktop client as ACP client, also motivated by Claude Pro/Max access

If you believe this was flagged incorrectly, please let a maintainer know.

[jcubic]

Removed instructions on how to implement the feature.

[github-actions]

Thank you for updating the issue! It now meets our contributing guidelines and the needs:compliance label has been removed.