mymem0ry 0.12.1

Personal memory search system with semantic query expansion

myMem0ry

Personal memory for AI coding agents. Offline. Zero API keys. Works with any agent.

What it does

Persistent memory that any AI agent can read and write. Quit Claude Code mid-task, open Codex in the same directory — it picks up where you left off.

• Scoped memory: session → context (branch) → project → global
• Cross-agent handoffs: typed handoff records with summary, open questions, next steps
• Auto-resolves context from cwd (git branch, remote URL)
• Semantic search: spaCy + sqlite-vec + BM25/FTS5/hybrid RRF fusion
• Lifecycle hooks: fire-and-forget HTTP endpoint, payload sanitization, immutable observations
• Retention: salience-based decay with tiers (working/procedural/semantic), pin/unpin
• Auth: Bearer token, host allowlisting, CORS (for HTTP transport)
• Web UI: dark mode read-only viewer (dashboard, projects, search, audit log)
• Backup/restore: tarball CLI commands

Install

Prerequisites

pip install uv        # or: curl -LsSf https://astral.sh/uv/install.sh | sh
uv tool install mymem0ry
mymem0ry doctor       # checks + auto-installs spaCy model

For Portuguese: set SPACY_MODEL=pt_core_news_lg in .env before running mymem0ry doctor.

Zero config: after install, just add the MCP server + hooks to your agent config below. The HTTP server auto-starts when the MCP server runs — no separate serve command needed.

Claude Code

claude mcp add --scope user mymem0ry -- mymem0ry-mcp

OpenCode

Add to ~/.config/opencode/opencode.json (global) or ./opencode.json (project):

{
  "mcp": {
    "mymem0ry": {
      "type": "local",
      "command": ["mymem0ry-mcp"],
      "enabled": true
    }
  },
  "hooks": {
    "session-start": "curl -s -m 2 -X POST http://127.0.0.1:49374/hook -H 'Content-Type: application/json' -d '{\"kind\":\"session-start\",\"session_id\":\"'$OPENCODE_SESSION_ID'\",\"agent\":\"opencode\",\"cwd\":\"'$PWD'\"}' > /dev/null 2>&1",
    "session-end": "curl -s -m 2 -X POST http://127.0.0.1:49374/hook -H 'Content-Type: application/json' -d '{\"kind\":\"session-end\",\"session_id\":\"'$OPENCODE_SESSION_ID'\",\"agent\":\"opencode\",\"cwd\":\"'$PWD'\"}' > /dev/null 2>&1"
  }
}

The hooks POST lifecycle events to POST /hook (fire-and-forget, 2s timeout). No manual server start needed — the HTTP server auto-starts when the MCP server runs (e.g., when your agent starts).

Claude Code

MCP + hooks em ~/.claude/settings.json:

{
  "mcpServers": {
    "mymem0ry": {
      "type": "stdio",
      "command": "mymem0ry-mcp"
    }
  },
  "hooks": {
    "SessionStart": [
      {
        "matcher": "",
        "hooks": [{"type": "command", "command": "~/.local/share/mymem0ry/hooks/claude-code/session-start.sh"}]
      }
    ],
    "SessionEnd": [
      {
        "matcher": "",
        "hooks": [{"type": "command", "command": "~/.local/share/mymem0ry/hooks/claude-code/session-end.sh"}]
      }
    ]
  }
}

Os scripts de hook: ~/.local/share/mymem0ry/hooks/claude-code/session-start.sh e session-end.sh. Eles recebem o payload completo no stdin (incluindo messages no session-end) e encaminham para POST /hook.

Codex CLI

codex mcp add mymem0ry -- mymem0ry-mcp

VS Code

code --add-mcp '{"name":"mymem0ry","command":"mymem0ry-mcp"}'

Cursor

cursor --add-mcp '{"name":"mymem0ry","command":"mymem0ry-mcp"}'

Gemini CLI

Same stdio pattern. Add to Gemini CLI MCP config with command: mymem0ry-mcp.

Docker

docker compose -f docker/docker-compose.yml up -d
curl http://127.0.0.1:49374/health

For detailed per-agent instructions (manual config, HTTP mode): docs/install.md

Lifecycle Hooks (per-agent setup)

Lifecycle hooks POST to POST /hook on the myMem0ry HTTP server. The server auto-starts when the MCP server runs — no manual serve step needed.

Agent	Lifecycle hooks	How it works
OpenCode	✅ Nativo	hooks em opencode.json com $OPENCODE_SESSION_ID (ver acima)
Claude Code	✅ Nativo	hooks em ~/.claude/settings.json — scripts recebem payload completo no stdin, incluindo messages no session-end
Codex CLI	✅ Hook scripts	codex hook add session-end ./hook-session-end.sh
Genérico	—	curl -X POST http://127.0.0.1:49374/hook -H 'Content-Type: application/json' ...

Hook payload fields:

Field	Required	Description
kind	yes	session-start, session-end, log, user-prompt, post-tool-use, pre-compact
session_id	yes	Unique session identifier (max 64 chars)
agent	no	opencode, claude-code, codex, manual, hook (max 64 chars)
cwd	no	Working directory for context resolution (max 512 chars)
title	no	Short label (max 500 chars)
body	no	Content (max 10 000 chars)
messages	no (session-end)	[{"role": "user"|"assistant", "content": "..."}] — archived as .md

All payloads are sanitized: secrets (API keys, tokens, Bearer) are redacted, home paths are stripped, and fields are truncated to max lengths.

Configuration

All via environment variables (or .env file in the project root):

Variable	Default	Description
CONVERSATIONS_DIR	data/conversations	Where .md conversation files are stored
DB_PATH	data/memories.db	SQLite memories database
VECTOR_DB_PATH	data/conversations/.vec.db	sqlite-vec index
SPACY_MODEL	en_core_web_lg	spaCy model for embeddings and search
MEM0RY_HOST	127.0.0.1	Host for HTTP transport
MEM0RY_PORT	49374	Port for HTTP transport
MEM0RY_TOKEN	(empty)	Bearer token for HTTP auth (skip = no auth)
MEM0RY_ALLOWED_HOSTS	localhost,127.0.0.1	Host allowlist (DNS rebinding protection)
MEM0RY_CORS_ORIGINS	(empty)	CORS origins for web UI

Custom storage location

export DB_PATH=/path/to/shared/memories.db
export CONVERSATIONS_DIR=/path/to/shared/conversations

For Portuguese language support:

export SPACY_MODEL=pt_core_news_lg
mymem0ry doctor       # auto-downloads the model

Import conversations

myMem0ry auto-detects the format. Supports ChatGPT, Gemini, and Claude exports.

# Auto-detect from default locations (data/openai, data/gemini, data/claude)
mymem0ry split

# Specific source
mymem0ry split --source path/to/chatgpt-export
mymem0ry split --source path/to/gemini-takeout
mymem0ry split --source path/to/claude-export

# Force parser type
mymem0ry split --source path/to/data --type openai
mymem0ry split --source path/to/data --type gemini
mymem0ry split --source path/to/data --type claude-code

# Then build indexes and migrate to structured memory
mymem0ry index
mymem0ry migrate

CLI commands

# Context & search
mymem0ry context --cwd .                    # Load context for current project
mymem0ry save "Title" "Content" --scope project  # Save a memory
mymem0ry log "message"                      # Quick session log
mymem0ry search "query"                     # ripgrep search
mymem0ry search "query" --backend hybrid --expand
mymem0ry index                              # Build BM25 + FTS5 + vector indexes
mymem0ry migrate --reprocess                # Reingest into latest schema

# Overview
mymem0ry stats                              # Database overview
mymem0ry projects                           # List projects with memories
mymem0ry doctor                             # System health check

# Retention
mymem0ry decay --days 90 --dry-run          # Preview decay
mymem0ry pin <memory_id>                    # Pin memory (exempt from decay)
mymem0ry unpin <memory_id>                  # Unpin memory
mymem0ry forget-sweep --dry-run             # Preview salience-based sweep

# Handoffs
mymem0ry handoff begin --summary "..."      # Create handoff for next agent
mymem0ry handoff accept                     # Accept pending handoff
mymem0ry handoff status                     # Check server status

# Server & backup
mymem0ry serve                              # Start HTTP server (MCP + hooks + handoffs + web UI)
mymem0ry serve --detach                     # Start in background (daemon mode)
mymem0ry backup --to backup.tar.gz          # Backup DB + conversations
mymem0ry restore --from backup.tar.gz       # Restore from backup

# Other
mymem0ry benchmark "query"                  # Compare search backends
mymem0ry expand "token"                     # Semantically related tokens
mymem0ry dataset                            # ChatML JSONL (legacy)
mymem0ry observe session-start              # Send lifecycle observation

Memory scopes

Resolved automatically from cwd — no manual configuration needed:

Scope	Identifier	What it stores	Example
session	auto UUID	Current session state	"Trying to fix auth bug"
context	git branch	Decisions for a branch	"On feat/auth, using JWT"
project	git remote URL	Project architecture	"Uses FastAPI + SQLite"
global	—	User preferences	"Prefer conventional commits"

get_context() aggregates all 4 levels in priority order.

MCP Tools + Hook Writes

MCP Tools (low token cost — reads + selective writes)

Tool	Description
get_context	Aggregate context from all scopes
save_memory	Save a memory with scope, type, and auto-resolved context
search_memory	Search with semantic query expansion
memory_stats	Database statistics
memory_handoff_begin	Create handoff for next agent
memory_handoff_accept	Accept pending handoff
memory_pin	Pin a memory (exempt from decay)
memory_unpin	Unpin a memory
memory_forget_sweep	Sweep stale memories (preview or execute)

Hook writes (zero LLM tokens)

Hook kind	Description
session-end with messages	Archives full conversation to .md + auto-handoff
log	Quick session log (creates session-scoped memory)
session-start	Records session start observation
user-prompt / post-tool-use / pre-compact	Lifecycle observations

All writes go through POST /hook (fire-and-forget, 2s timeout). Payloads are sanitized (secrets redacted, paths stripped, fields truncated). The LLM never serializes conversations.

The CLI mymem0ry observe can also send lifecycle events and supports MEM0RY_TOKEN auth.

Web UI

When running in HTTP mode (MCP_TRANSPORT=streamable-http), a read-only web UI is available:

• / — Dashboard with stats and recent memories
• /projects — List of projects with memory counts
• /project/{id} — Project detail with memories
• /memory/{id} — Single memory detail
• /search — Full-text search with scope/type filters
• /audit — Audit log of all mutations
• /api/memories — JSON API endpoint

Documentation

• docs/install.md — Detailed per-agent install instructions
• docs/usage.md — Usage guide, hooks, and workflows
• AGENTS.md — Architecture and developer reference

Development

git clone https://github.com/cccadet/myMem0ry.git
cd myMem0ry
bin/setup
uv run python -m pytest
uv run ruff check .

License

MIT