Charon
About
Charon gives AI clients scoped, auditable access to Lethe memory. connect to Chatgpt or Claude to store memories locally.
Details
- Author
- openlethe
- Categories
- Developer Tools, Other, AI
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Setup
Install Charon in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/openlethe/lethe
Follow the installation instructions in the repository README, then restart your MCP client.
Lethe is a self-hosted persistent memory platform for AI agents. It gives agents durable, reviewable memory that survives sessions, restarts, and model changes — without surrendering that memory to a third party.
Any agent can use Lethe: ChatGPT, Claude, Claude Code, Cursor, VS Code agents, OpenClaw, custom MCP clients, local IDE assistants, or backend services. Lethe is a general-purpose memory platform; theOpenClaw pluginis one excellent integration, not a requirement.
Every agent session starts from zero. The same question, the same reasoning, the same dead ends — every time. Lethe breaks that loop with two complementary memory systems:
- Session memory— events, summaries, checkpoints, and interruption recovery so an agent resumes exactly where it stopped.
- Versioned memory— durable, shared, review-gated knowledge with immutable history, provenance, branching, and merging (seeMemory Git).
- Individualsgiving a single agent (ChatGPT, Claude, Cursor, an IDE assistant) a long memory.
- Teamsrunning several agents against one shared, reviewed memory backend.
- Operatorswho need memory to stay on their own infrastructure, in one container, with their keys.
Details and decision guidance:docs/runtime-modes.md.
# legacy session memory, port 18483 docker run -d --name lethe \ -p 127.0.0.1:18483:18483 \ -v ./lethe-data:/data \ ghcr.io/openlethe/lethe:latest
Memory Git (git mode) runs fromdocker-compose.git.yml; hybrid mode is one instance with both surfaces. Full instructions, all compose variations, and source builds:docs/installation.md·docs/docker-compose.md
- Overview— what Lethe is and isn't, principles, ecosystem
- Installation— Docker, git mode, hybrid, source build
- Runtime modes— legacy vs git vs hybrid, how to choose
- Memory Git— versioned memory, refs, changesets, proposals, merges
- Legacy mode— session memory and the OpenClaw experience
- Architecture— components, boundary, data model, security
- Configuration— every environment variable
- Deployment & operations— production checklist, upgrades, backup
- Compose variations— legacy, git, hybrid, governed stack
- HTTP API reference— every route, both surfaces
- OpenClaw— the plugin integration
- Integrations— ChatGPT, Claude Code, Cursor, MCP, multi-agent
- Migration & upgrading— version migrations, legacy ↔ Memory Git
- FAQ
Protocol and deep-dive references:memory-git-v1.md(thememory_git/v1contract) ·memory-context-bridge.md(projection & manifests) ·observability.md(metrics, SLOs, alerts)
- Charon— the MCP authorization and governance gateway for Lethe: scoped principals, independent review, replay-proof protected merges, and a fail-closed audit ledger. Recommended for shared or multi-agent deployments.
- OpenClaw plugin— optional context engine for OpenClaw, published on ClawHub aslethe. Optional; everything works without it.
SeeLICENSE. Issues and contributions:CONTRIBUTING.md· Security reports:SECURITY.md
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