Mnemo

Autonomous bitemporal memory engine for AI coding agents.

Mnemo provides persistent, cross-session architectural memory. It automatically maps repository structure, tracks context across edits, and exposes structured retrieval via Model Context Protocol (FastMCP) and clean CLI tools.

Key Features

• Autonomous AST Mapping: Automatically parses modules, classes, and dependencies with incremental SHA-256 diff caching.

• Bitemporal Knowledge Engine: Tracks both event time and assertion time using SQLite with WAL mode and full-text search (FTS5).

• Self-Healing Storage: Dynamic schema migrations and automatic FTS index repair.

• Dark Minimal Visualizer: Interactive 3-column Sankey graph mapping categories, memory tiers, and architecture flows.

Related MCP server: NEAT MCP Server

Installation

pip install mnemo

Quick Start

1. Initialize Memory Store

mnemo init

2. Autonomous Repository Scan

mnemo scan .

3. Interactive Knowledge Visualization

mnemo visualize

4. Health Diagnostics

mnemo doctor

Model Context Protocol (FastMCP)

Mnemo integrates natively with Claude Desktop, Cursor, Antigravity, and any MCP client over stdio:

{
  "mcpServers": {
    "mnemo": {
      "command": "mnemo",
      "args": ["serve"]
    }
  }
}

Available MCP Tools

• mnemo_remember: Stores or updates facts through the AUDN classifier and auto-links mentioned code entities.

• mnemo_search: Hybrid 3-channel retrieval (Vector + FTS5 + Recursive CTE Graph) fused via Reciprocal Rank Fusion (RRF).

• mnemo_scan_project: Triggers an on-demand incremental AST scan of the repository.

• mnemo_invalidate: Soft-deletes records with bitemporal invalidation timestamps.

• mnemo_tier_decay: Recalculates Ebbinghaus salience decay and tier promotions/demotions.

• mnemo_get_debt_ledger: Detects decaying working-tier facts, stale core assumptions, and architectural debt.

Architecture

• Storage: Local SQLite in WAL mode with FTS5 BM25, vector embeddings, and recursive CTE graph traversal.

• Serialization: Token-Optimized Object Notation (TOON) providing up to 56% token savings over standard JSON.

• CLI: Borderless Matrix interface powered by Typer and Rich.

License

MIT License. Copyright (c) 2026 Mnemo Contributors.