LeanCTX Ships v3.7.0 at 2.4K Stars: Context OS Provides 63 MCP Tools With 10 Read Modes and Up to 99% Token Savings for AI Development

GitHub·medium signal

LeanCTX (yvgude/lean-ctx) is a single local Rust binary that compresses, remembers, routes, and verifies tokens between code and models through 63-67 MCP tools. V3.7.0 shipped June 1 with Tree-sitter AST processing for 18 languages, 56 shell output compression pattern modules, and a 4-layer verification engine. Cached file re-reads cost ~13 tokens versus 2,000+ for initial reads, with LSP refactoring tools (rename, references, go-to-definition) built into the MCP surface.