fallow
Codebase intelligence for TypeScript and JavaScript. Free static analysis of code and styles: unused code, duplication, circular deps, complexity hotspots, architecture boundaries, design-system drift. Optional paid runtime layer (Fallow Runtime): hot-path review and cold-path deletion evidence from real production traffic.
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fallow is a Rust-based static analysis tool and MCP server that provides codebase intelligence for TypeScript and JavaScript. It detects unused code, duplication, circular dependencies, complexity hotspots, architecture boundary violations, and design-system drift, with an optional paid runtime layer offering hot-path review and cold-path deletion evidence from production traffic.
It consolidates several code-quality checks into one toolchain and exposes them over MCP so agents can analyze a codebase directly.
Use it to
- Find unused code, exports, and dependencies in a TypeScript or JavaScript codebase
- Detect duplicated and copy-pasted code blocks
- Map circular dependencies and architecture boundary violations
- Surface complexity hotspots during refactoring
- Wire code-quality analysis into an MCP-compatible agent
For JavaScript and TypeScript developers maintaining medium-to-large codebases
- Role
- mcp-server
- Language
- Rust
- Licence
- MIT
- Forks
- 160
- Open issues
- 17
- Last push
- 2026-09-17
- Latest release
- v0.1.1 · 2026-03-17
- Skills shipped
- 30