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Tools2026-05-10 · source-backed
lean-ctx is a Rust-based system that sits between AI coding tools and LLMs, compressing file reads by 60-99% and shell output by 60-95% using Tree-sitter AST parsing for 18 languages. Cached re-reads cost only 13 tokens. Works as a standard MCP server with 49 tools. Compatible with Claude Code, Cursor, Copilot, Windsurf, and Codex. Context optimization is becoming its own tool category.
Each link below shares sources, entities, or timing with this story.
Cursor benchmarked against Codex / Shared entities / Same source domain / Shared topic / What happened next
Linked by a graph relationship (Cursor benchmarked against Codex); both cover Claude Code, Codex, Copilot, Cursor; reported by the same outlet (github.com).
Linked by a graph relationship (Cursor benchmarked against Codex); both cover Claude Code, Codex, Cursor, Rust; reported by the same outlet (github.com).
Cursor benchmarked against Codex / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Cursor benchmarked against Codex); both cover Claude Code, Codex, Cursor, MCP; reported by the same outlet (github.com).
Linked by a graph relationship (Cursor benchmarked against Codex); both cover Claude Code, Codex, Cursor, MCP; reported by the same outlet (github.com).
Cursor benchmarked against Codex / Shared entities / Same source domain / Shared topic / What happened next / Tension
Linked by a graph relationship (Cursor benchmarked against Codex); both cover Claude Code, Codex, Copilot, Cursor; reported by the same outlet (github.com).
Cursor benchmarked against Codex / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (Cursor benchmarked against Codex); both cover Claude Code, Codex, Cursor, LLMs; reported by the same outlet (github.com).
Cursor benchmarked against Codex / Shared entities / Same source domain / Shared topic / What happened next
Linked by a graph relationship (Cursor benchmarked against Codex); both cover Claude Code, Codex, Copilot, Cursor; reported by the same outlet (github.com).
Linked by a graph relationship (Cursor benchmarked against Codex); both cover Claude Code, Codex, Copilot, Cursor; reported by the same outlet (github.com).