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lean-ctx

MCPOpen source

LeanCTX is a local-first context intelligence layer for AI coding agents, cutting token usage by 50-80% with 76 MCP tool

3.6kApache-2.0

Control what your AI can see. LeanCTX (Lean Context) is the context intelligence layer for AI agents — one local Rust binary that decides what they read, remembers what they learn, guards what they touch, and proves what they save. 60–90% fewer tokens as the receipt. 76 MCP tools, 30+ agents, local-first.

Pros

  • +Reduces token usage by 50-80% through caching and compression
  • +Works with 30+ AI agents including Cursor, Claude Code, and Copilot
  • +Local-first with zero configuration required
  • +Provides real-time dashboard for context and cost tracking

Cons

  • −Requires a local binary installation
  • −May have a learning curve for advanced features
  • −Compression effectiveness varies by language and mode

Target audience: Developers using AI coding agents who want to reduce token costs and improve context management.

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