opencode

A plugin for opencode that appends relevant memories to each turn and captures sessions when they go idle.

The opencode plugin gives opencode the same memory loop as the Claude Code hooks.

• Recall: each user message is searched against m3m0s, and the relevant hits are appended to that turn’s system prompt.
• Capture: on session.idle (as Stop) and on shutdown (SessionEnd) the session text is written to ~/.m3m0s/hooks/opencode/<session>.jsonl and handed to m3m0s hook claude-code. Memories carry source: "opencode".

Install

1. Install the binary and store the credentials: CLI and credentials. Set M3M0S_BIN if the binary is not at ~/go/bin/m3m0s or on PATH.
2. Add the npm package to the plugin array of opencode.json. opencode installs it on start:

{
  "plugin": ["@rafaelvieiras/m3m0s-opencode"]
}

Manual install

Or put the file in opencode’s plugins folder:

mkdir -p ~/.config/opencode/plugins
curl -fsSL https://raw.githubusercontent.com/rafaelvieiras/m3m0s/main/integrations/opencode/m3m0s-memory.js \
  -o ~/.config/opencode/plugins/m3m0s-memory.js

Then add it to opencode.json:

{
  "plugin": ["./plugins/m3m0s-memory.js"]
}

Optional: read-only MCP

So the agent can also search explicitly:

{
  "mcp": {
    "m3m0s": {
      "type": "local",
      "enabled": true,
      "command": ["sh", "-c", "set -a; . \"$HOME/.m3m0s/hook.env\"; exec m3m0s mcp --read-only"]
    }
  }
}

Troubleshooting

Failures are silent and never block opencode. The log is ~/.m3m0s/hooks/claude-code.log. Run m3m0s doctor to check credentials and the connection.

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