# dsh-mem0

[Mem0](https://mem0.ai) long-term memory as a native [DeepSeek Harness](https://github.com/deepseek-ai/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
      |
[ dsh-mem0: apply(ctx) -> ctx.tools.register(...) ]  <-- this package
      |
[ DeepSeek Harness ]  <-- the agent, loaded via cordis.yml
```

## Try it locally

1. Build the plugin:
   ```sh
   cd integrations/dsh-mem0
   pnpm install
   pnpm build
   ```
2. Set your Mem0 key:
   ```sh
   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:
   ```sh
   pnpm dsh web --patch ./integrations/dsh-mem0/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.