Idea: cross-session memory for OpenAgent via an MCP server that fits the Stdio config

[samvallad33]

Disclosure first: I maintain Vestige, so this is an interested-party idea. Posting in Ideas rather than opening an issue, since CONTRIBUTING reserves issues for bugs and feature requests.

OpenAgent already supports MCP servers over Stdio, but a fresh run does not carry the prior session's context, so decisions and corrections do not persist across runs. An external memory MCP server covers that with no code change and nothing leaving the machine.

Vestige - Local-first cognitive memory MCP server for AI coding agents. FSRS-6 retention, prediction-error gating, active forgetting, spreading activation, 3D dashboard. Single Rust binary. npm install -g vestige-mcp-server.

It fits the same Stdio MCP entry shape you already use:

{
  "mcpServers": {
    "vestige": {
      "command": "npx",
      "args": ["-y", "vestige-mcp-server"]
    }
  }
}

The agent can write a durable note in one session and recall it later. Storage stays local by default. I am biased since I maintain it, so if you would rather document the category generically that is fine too. Happy to send a short docs recipe if useful.

Sam Valladares, github samvallad33