mempalace

> [!CAUTION] > **Scam alert.** The only official sources for MemPalace are this > [GitHub repository](https://github.com/MemPalace/mempalace), the > [PyPI package](https://pypi.org/project/mempalace/), and the docs site at > **[mempalaceofficial.com](https://mempalaceofficial.com)**. Any other > domain — including `mempalace.tech` — is an impostor and may distribute > malware. Details and timeline: [docs/HISTORY.md](docs/HISTORY.md). > [!IMPORTANT] > **🚨 Claude Code sessions expire in 30 days w/out auto-save hooks wired!** **[Read this →](https://github.com/MemPalace/mempalace/discussions/1388)** <div align="center"> <img src="assets/mempalace_logo.png" alt="MemPalace" width="240"> # MemPalace Local-first AI memory. Verbatim storage, pluggable backend, 96.6% R@5 raw on LongMemEval — zero API calls. [![][version-shield]][release-link] [![][python-shield]][python-link] [![][license-shield]][license-link] [![][discord-shield]][discord-link] </div> --- ## What it is MemPalace stores your conversation history as verbatim text and retrieves it with semantic search. It does not summarize, extract, or paraphrase. The index is structured — people and projects become *wings*, topics become *rooms*, and original content lives in *drawers* — so searches can be scoped rather than run against a flat corpus. The retrieval layer is pluggable. The current default is ChromaDB; the interface is defined in [`mempalace/backends/base.py`](mempalace/backends/base.py) and alternative backends can be dropped in without touching the rest of the system. Nothing leaves your machine unless you opt in. Architecture, concepts, and mining flows: [mempalaceofficial.com/concepts/the-palace](https://mempalaceofficial.com/concepts/the-palace.html). --- ## Install We recommend [`uv`](https://docs.astral.sh/uv/) — `uv tool install` puts the `mempalace` CLI in an isolated environment on your PATH: ```bash uv tool install mempalace mempalace init ~/projects/myapp ``` If you prefer pip, `pip install mempalace` still works. ## Quickstart ```bash # Mine content into the palace mempalace mine ~/projects/myapp # project files mempalace mine ~/.claude/projects/ --mode convos # Claude Code sessions (scope with --wing per project) # Search mempalace search "why did we switch to GraphQL" # Load context for a new session mempalace wake-up ``` For Claude Code, Gemini CLI, MCP-compatible tools, and local models, see [mempalaceofficial.com/guide/getting-started](https://mempalaceofficial.com/guide/getting-started.html). --- ## Benchmarks All numbers below are reproducible from this repository with the commands in [`benchmarks/BENCHMARKS.md`](benchmarks/BENCHMARKS.md). Full per-question result files are committed under `benchmarks/results_*`. **LongMemEval — retrieval recall (R@5, 500 questions):** | Mode | R@5 | LLM required | |---|---|---| | Raw (semantic search, no heuristics, no LLM) | **96.6%** | None | | Hybrid v4, held-out 450q (tuned on 50 dev, not seen during training) | **98.4%** | None | | Hybrid v4 + LLM rerank (full 500) | ≥99% | Any capable model | The raw 96.6% requires no API key, no cloud, and no LLM at any stage. The hybrid pipeline adds keyword boosting, temporal-proximity boosting, and preference-pattern extraction; the held-out 98.4% is the honest generalisable figure. The rerank pipeline promotes the best candidate out of the top-20 retrieved sessions using an LLM reader. It works with any reasonably capable model — we have reproduced it with Claude Haiku, Claude Sonnet, and minimax-m2.7 via Ollama Cloud (no Anthropic dependency). The gap between raw and reranked is model-agnostic; we do not headline a "100%" number because the last 0.6% was reached by inspecting specific wrong answers, which `benchmarks/BENCHMARKS.md` flags as teaching to the test. **Other benchmarks (full results in [`benchmarks/BENCHMARKS.md`](benchmarks/BENCHMARKS.md)):** | Benchmark | Metric | Score | Notes | |---|---|---|---| | LoCoMo (session, top-10, no rerank) | R@10 | 60.3% | 1,986 questions | | LoCoMo (hybrid v5, top-10, no rerank) | R@10 | 88.9% | Same set | | ConvoMem (all categories, 250 items) | Avg recall | 92.9% | 50 per category | | MemBench (ACL 2025, 8,500 items) | R@5 | 80.3% | All categories | We deliberately do not include a side-by-side comparison against Mem0, Mastra, Hindsight, Supermemory, or Zep. Those projects publish different metrics on different splits, and placing retrieval recall next to end-to-end QA accuracy is not an honest comparison. See each project's own research page for their published numbers. **Reproducing every result:** ```bash git clone https://github.com/MemPalace/mempalace.git cd mempalace uv sync --extra dev # or: pip install -e ".[dev]" # see benchmarks/README.md for dataset download commands uv run python benchmarks/longmemeval_bench.py /path/to/longmemeval_s_cleaned.json ``` --- ## Knowledge graph MemPalace includes a temporal entity-relationship graph with validity windows — add, query, invalidate, timeline — backed by local SQLite. Usage and tool reference: [mempalaceofficial.com/concepts/knowledge-graph](https://mempalaceofficial.com/concepts/knowledge-graph.html). ## MCP server 29 MCP tools cover palace reads/writes, knowledge-graph operations, cross-wing navigation, drawer management, and agent diaries. Installation and the full tool list: [mempalaceofficial.com/reference/mcp-tools](https://mempalaceofficial.com/reference/mcp-tools.html). ## Agents Each specialist agent gets its own wing and diary in the palace. Discoverable at runtime via `mempalace_list_agents` — no bloat in your system prompt: [mempalaceofficial.com/concepts/agents](https://mempalaceofficial.com/concepts/agents.html). ## Auto-save hooks Two Claude Code hooks save periodically and before context compression: [mempalaceofficial.com/guide/hooks](https://mempalaceofficial.com/guide/hooks.html). For per-message recall on top of the file-level chunks the hooks produce, run `mempalace sweep <transcript-dir>` periodically — it stores one verbatim drawer per user/assistant message, idempotent and resume-safe. --- ## Requirements - Python 3.9+ - A vector-store backend (ChromaDB by default) - ~300 MB disk for the default embedding model No API key is required for the core benchmark path. ## Docs - Getting started → [mempalaceofficial.com/guide/getting-started](https://mempalaceofficial.com/guide/getting-started.html) - CLI reference → [mempalaceofficial.com/reference/cli](https://mempalaceofficial.com/reference/cli.html) - Python API → [mempalaceofficial.com/reference/python-api](https://mempalaceofficial.com/reference/python-api.html) - Full benchmark methodology → [benchmarks/BENCHMARKS.md](benchmarks/BENCHMARKS.md) - Release notes → [CHANGELOG.md](CHANGELOG.md) - Corrections and public notices → [docs/HISTORY.md](docs/HISTORY.md) ## Contributing PRs welcome. See [CONTRIBUTING.md](CONTRIBUTING.md). ## License MIT — see [LICENSE](LICENSE). <!-- Link Definitions --> [version-shield]: https://img.shields.io/badge/version-3.3.4-4dc9f6?style=flat-square&labelColor=0a0e14 [release-link]: https://github.com/MemPalace/mempalace/releases [python-shield]: https://img.shields.io/badge/python-3.9+-7dd8f8?style=flat-square&labelColor=0a0e14&logo=python&logoColor=7dd8f8 [python-link]: https://www.python.org/ [license-shield]: https://img.shields.io/badge/license-MIT-b0e8ff?style=flat-square&labelColor=0a0e14 [license-link]: https://github.com/MemPalace/mempalace/blob/main/LICENSE [discord-shield]: https://img.shields.io/badge/discord-join-5865F2?style=flat-square&labelColor=0a0e14&logo=discord&logoColor=5865F2 [discord-link]: https://discord.com/invite/ycTQQCu6kn