Leanrea

Leanrea is a reverse-engineering skill file that provides direct CLI commands for agents without an MCP server layer.

Leanrea is an 8 KB skill file that replaces the REA toolset by enabling coding agents to use standard CLI commands directly through Bash. It removes the need for an MCP server, extra tool definitions, and complex setup processes. The skill provides routing rules, fast commands for various file targets, and recon patterns for analyzing binaries, apps, and web bundles. It supports targets like Electron asars, Mach-O binaries, Go builds, and native code. It runs with agents like Claude Code, Cursor, and Codex, reducing context token overhead and execution costs compared to heavier setups.

Leanrea at a glance

Best for: Software engineer
Runs on: Web, macOS, Windows, Linux, CLI, open source
Pricing: Free under MIT license
Released: October 2026
Category: AI coding tool
Website: github.com/aicodeking/leanrea

Key features

Routes targets by file type and magic bytes
Slices minified files instead of reading whole contents
Batches probes into single shell calls
Searches extracted trees with ripgrep
Provides paste-and-run commands for native binaries
Tracks claims as seen, inferred, or unknown

Use it for

Tracing features through Electron app structures
Inventorying exports and permissions in native addons
Checking toolchain versions of binary files
Analyzing socket paths and wire protocols from disassembly

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