mem0/integrations/deepseek-plugin/README.md

deepseek-plugin

Mem0 long-term memory as a native DeepSeek Harness (Cordis) plugin.

It gives a Harness agent two memory tools backed by the Mem0 SDK, so recall and writes persist across sessions:

Tool	Does
search_memory	Recall facts from Mem0 relevant to a query
add_memory	Store a fact in Mem0 for future sessions

Unlike the local/file-based memory plugins in the ecosystem, Mem0 is a managed backend: server-side extraction, semantic dedup and conflict resolution, and the same memory bank reusable across Harness, Claude Code, Codex, and other agents.

How it works

A Cordis plugin is a module exporting apply(ctx, config). This one declares inject = ['tools'] so it waits for the harness tool registry, then registers the two tools via ctx.tools.register(defineTool(...)). When the plugin unmounts, the tools are removed automatically (Cordis revertible effects).

[ mem0ai SDK ]  <-- managed memory, owned by Mem0
      |
[ deepseek-plugin: apply(ctx) -> ctx.tools.register(...) ]  <-- this package
      |
[ DeepSeek Harness ]  <-- the agent, loaded via cordis.yml

Try it locally

1. Build the plugin:

   cd integrations/deepseek-plugin
   pnpm install
   pnpm build
   

2. Set your Mem0 key:

   export MEM0_API_KEY=...
   

3. Point Harness at it. Copy cordis.example.yml, set the absolute path to dist/index.js and your userId, then:

   pnpm dsh web --patch ./integrations/deepseek-plugin/cordis.example.yml
   

4. Open http://127.0.0.1:3080 and ask the agent to remember something, then recall it in a later turn.

For a Mem0 Platform on-prem or dedicated deployment, point config.host at that base URL (defaults to api.mem0.ai). host is a Platform base-URL override — it is not a switch to self-hosted Mem0 OSS, whose server exposes a different API surface.

Configuration

Field	Required	Default	Notes
apiKey	no	$MEM0_API_KEY	Mem0 platform API key
userId	yes		Entity that owns the memories
host	no	api.mem0.ai	Platform base URL (on-prem / dedicated)

Telemetry

Writes are tagged source="DEEPSEEK_HARNESS" so Mem0's backend can attribute usage to this integration. For it to surface by name (rather than bucketing into OTHERS), DEEPSEEK_HARNESS must be present in the backend's KNOWN_EVENT_SOURCES allowlist, a one-line platform change matching the existing ZAPIER / STRANDS sources.

Status

Developer preview. Tracks the DeepSeek Harness v0.1 plugin API (@deepseek-ai/cordis, @deepseek-ai/dsh-tools), which is young and moving; pin versions once it stabilizes. Auto-capture (store turns without an explicit tool call) and auto-recall (inject memory into the prompt at assembly) are planned once the harness session/assembly event API is confirmed.