[BUG]: /compact is not advertised over ACP #37229

Description

When OpenCode runs as an ACP agent in Zed, the built-in /compact command is not included in available_commands_update. Zed rejects it as an unrecognized command before it reaches OpenCode, even though the ACP service already handles /compact through session.summarize().

Plugins

None required.

OpenCode version

1.18.2

Steps to reproduce

1. Configure Zed to run opencode acp as an external agent.
2. Open an agent session and enter /compact.
3. Zed reports that /compact is not recognized and omits it from the available command list.

Operating System

Linux

Terminal

Zed Agent Panel