[Feature] opencode support

[yale-Liyao]

Is this feature related to a problem? | 该功能需求是否与某个问题相关？请描述

The commonly used tool is opencode. Can it support opencode plugins? The open-source programming Agent also has a large user base, so I hope it can be supported.

Describe the solution you'd like | 描述你期望的解决方案

Can support compatibility with the opencode Plugin API

Describe alternatives you've considered | 描述你考虑过的其他方案

No response

Additional context | 补充说明

No response

[RerankerGuo]

I am claiming this as a focused OpenCode adapter contribution. I will reuse the already-reviewed Gateway boundary from #316 (GatewayMemoryClient / createGatewayPlatformAdapter) instead of introducing another shared SDK, and keep the PR limited to OpenCode plugin event mapping, focused lifecycle tests, and setup docs. The intended flow is recall before a user turn, capture only complete user/assistant turns, and flush on a real session-idle/end signal. I will keep the dependency on #316 explicit until that base lands.

[Sereinxm]

+1, also an OpenCode user. Currently using agentmemory which has full OpenCode support (22 hooks + MCP + 15 skills). Would love to switch to TencentDB-Agent-Memory once OpenCode plugin support lands. The layered memory (L0→L3) and Mermaid symbolic compression are exactly what I need for long-horizon tasks.

[Pythonpa]

+1, I'm also an Open Code user. It's a well-known terminal agent. I hope support for it can be added, or it can be made into a plugin similar to oh-my-openagent. Looking forward to it.