# @oh-my-pi/pi-mnemopi

> Local SQLite memory engine for omp agents

Latest version **18.3.1** (published 2026-09-25) · MIT license · 0 weekly downloads

## Install

```sh
npm install @oh-my-pi/pi-mnemopi
pnpm add @oh-my-pi/pi-mnemopi
yarn add @oh-my-pi/pi-mnemopi
bun add @oh-my-pi/pi-mnemopi
```

Provides the command `mnemopi`.

## Health

**Score 80/100 (A)** — status: active.

Positive: has types; esm support; no vulnerabilities; has provenance; recently updated; high maintenance score; high quality score; popular repo.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 18.3.1 |
| Published | 2026-09-25 |
| First published | 2026-05-31 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Dependencies | 4 |
| Unpacked size | 1.8 MB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 28852 |
| Author | Stencil Labs, Inc. |
| Maintainers | can1357 |
| Keywords | memory, sqlite, agent, embeddings, mcp |

## Links

- npm: https://www.npmjs.com/package/@oh-my-pi/pi-mnemopi
- Repository: https://github.com/can1357/oh-my-pi
- Homepage: https://omp.sh
- Issues: https://github.com/can1357/oh-my-pi/issues
- npm.io page: https://npm.io/package/@oh-my-pi/pi-mnemopi

## Dependencies (4)

- [@oh-my-pi/pi-ai](https://npm.io/package/@oh-my-pi/pi-ai.md) 18.3.1
- [@oh-my-pi/pi-utils](https://npm.io/package/@oh-my-pi/pi-utils.md) 18.3.1
- [@oh-my-pi/pi-catalog](https://npm.io/package/@oh-my-pi/pi-catalog.md) 18.3.1
- [@oh-my-pi/pi-natives](https://npm.io/package/@oh-my-pi/pi-natives.md) 18.3.1

## Recent versions

- 18.3.1 (latest) — 2026-09-25
- 18.3.0 — 2026-09-24
- 18.2.11 — 2026-09-23
- 18.2.10 — 2026-09-22
- 18.2.9 — 2026-09-22
- 18.2.8 — 2026-09-21
- 18.2.7 — 2026-09-21
- 18.2.6 — 2026-09-18
- 18.2.5 — 2026-09-17
- 18.2.4 — 2026-09-17
- 18.2.3 — 2026-09-17
- 18.2.2 — 2026-09-16
- 18.2.1 — 2026-09-15
- 18.2.0 — 2026-09-15
- 18.1.22 — 2026-09-14
- … 194 more at https://npm.io/package/@oh-my-pi/pi-mnemopi/versions

## README

# @oh-my-pi/pi-mnemopi

Local SQLite memory engine for omp agents.

This package is the Bun/TypeScript port of the Mnemosyne memory engine. It provides:

- `Mnemopi`, a small facade for remember/recall/stats/sleep workflows.
- `BeamMemory`, the lower-level working/episodic memory engine.
- MCP tool definitions and a dispatcher for host integrations.
- Optional local ONNX embeddings through `fastembed` and optional OpenAI-compatible embedding/LLM endpoints.

The package does not bundle or download a local GGUF LLM. LLM paths are host-backend or OpenAI-compatible remote only; when no LLM is configured, deterministic heuristic paths are used.

## Basic use

```ts
import { Mnemopi } from "@oh-my-pi/pi-mnemopi";

const memory = new Mnemopi({ dbPath: "./mnemopi.db", bank: "project" });
const id = memory.remember("The deployment target is stable-cluster.", {
	source: "notes",
	importance: 0.8,
	veracity: "true",
});

const results = memory.recall("deployment target", 5);
console.log(id, results[0]?.content);

memory.close();
```

## Configuration

`Mnemopi` accepts LLM and embedding options directly. `MNEMOPI_*` environment variables remain fallbacks/defaults when the matching constructor option is omitted.

```ts
import { Mnemopi } from "@oh-my-pi/pi-mnemopi";
import type { Model } from "@oh-my-pi/pi-ai";

const ftsOnly = new Mnemopi({ noEmbeddings: true });

const remoteEmbeddings = new Mnemopi({
	embeddingModel: "text-embedding-3-small",
	embeddingApiUrl: "https://api.openai.com/v1",
	embeddingApiKey: process.env.OPENAI_API_KEY,
});

const remoteLlm = new Mnemopi({
	llm: {
		baseUrl: "https://api.openai.com/v1",
		apiKey: process.env.OPENAI_API_KEY,
		model: "gpt-4.1-mini",
	},
	// Equivalent aliases: llmBaseUrl, llmApiKey, llmModel.
});

declare const smolModel: Model;
const piAiLlm = new Mnemopi({ llm: smolModel });
const dynamicLlm = new Mnemopi({
	llm: async (prompt, opts) => {
		const token = await getFreshOauthToken();
		return await completeWithPiAi(prompt, {
			token,
			maxTokens: opts?.maxTokens,
			temperature: opts?.temperature,
		});
	},
});
```

### Banks and host scoping

`Mnemopi` itself exposes banks directly through constructor options such as `bank`; it does not hard-code coding-agent project scoping.

The omp coding-agent wrapper adds `mnemopi.scoping` on top of those constructor options:

- `global`: one shared bank
- `per-project`: isolated project memory
- `per-project-tagged`: project-local writes plus global recall visibility

In `per-project-tagged`, the wrapper is responsible for combining project-local retention with global recall visibility. The package still just exposes banks plus constructor-level LLM and embedding options.

Common environment fallbacks:

- `MNEMOPI_DATA_DIR` / `MNEMOPI_DB_PATH`: default storage location.
- `MNEMOPI_DB_PAGE_SIZE`: optional SQLite page size for new file-backed databases; use a valid power of two from 512 to 65536 or `os` to request the detected system page size. Unset preserves SQLite's default.
- `MNEMOPI_NO_EMBEDDINGS=1`: force FTS-only recall.
- `MNEMOPI_EMBEDDING_MODEL`: defaults to `BAAI/bge-small-en-v1.5`.
- `MNEMOPI_EMBEDDING_API_URL` and `MNEMOPI_EMBEDDING_API_KEY`: OpenAI-compatible embedding endpoint.
- `MNEMOPI_LLM_ENABLED=1`, `MNEMOPI_LLM_BASE_URL`, `MNEMOPI_LLM_API_KEY`, `MNEMOPI_LLM_MODEL`: OpenAI-compatible LLM endpoint.

Local embeddings use the `fastembed` npm package. Its default `BGESmallENV15` model is 384-dimensional and uses the package's CLS pooling plus vector normalization path. Local GGUF LLMs are not available in this package.

## Commands

```sh
mnemopi remember "Use stable-cluster for production deploys"
mnemopi recall "production deploy target"
mnemopi stats
mnemopi sleep
```

## Tests

```sh
bun --cwd packages/mnemopi test
bun --cwd packages/mnemopi run check
```

---
_Source: https://npm.io/package/@oh-my-pi/pi-mnemopi · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._