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Achievement: Galaxy BrainAchievement: Starstruckx4Achievement: Pull Sharkx4Achievement: Public SponsorAchievement: Pair Extraordinairex3Achievement: QuickdrawAchievement: YOLOAchievement: Arctic Code Vault Contributor

Achievements

Achievement: Galaxy BrainAchievement: Starstruckx4Achievement: Pull Sharkx4Achievement: Public SponsorAchievement: Pair Extraordinairex3Achievement: QuickdrawAchievement: YOLOAchievement: Arctic Code Vault Contributor

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BartWaardenburg/README.md

Bart Waardenburg

I build open-source developer tools in Rust for the TypeScript and JavaScript ecosystem.

fallow

fallow is codebase intelligence for TypeScript and JavaScript. It reads a repository as one graph and reports:

  • a health score, complexity hotspots, and refactoring targets
  • duplication across code, styles, and components
  • architecture boundary violations and circular dependencies
  • design-system drift in CSS and CSS-in-JS
  • unused files, exports, types, and dependencies
  • the risk that a pull request adds, as a CI gate

The analyzer is deterministic, so CI, editors, and coding agents can build on its output. It is free and MIT licensed. Fallow Cloud, an optional paid add-on, merges production runtime coverage into the same reports.

npx fallow          # health, duplication, and unused code in one run
npx fallow audit    # the findings that your pull request introduces
npx fallow health   # health score, hotspots, and refactoring targets

It ships as a CLI, a GitHub Action, a GitLab template, a VS Code extension, and LSP and MCP servers. Docs: docs.fallow.tools.

Also in the fallow-rs organization

  • srcmap: a source map SDK for Rust tooling. It parses, generates, remaps, and composes source maps (ECMA-426).
  • oxc-coverage-instrument: Istanbul-compatible coverage instrumentation on the Oxc AST.

Other projects

  • spaceship-mcp: an MCP server for the Spaceship registrar (domains, DNS, contacts).
  • recraft-mcp-server: an MCP server for image generation with the Recraft API.

waardenburg.dev · X · LinkedIn · Sponsor fallow

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  1. fallow-rs/fallow fallow-rs/fallow Public

    Codebase intelligence for TypeScript and JavaScript. Health, complexity hotspots, duplication, architecture boundaries, circular dependencies, design-system drift, and unused code, from one graph. …

    Rust 5.2k 188

  2. fallow-rs/srcmap fallow-rs/srcmap Public

    The source map SDK for Rust tooling. Parse, generate, remap, and compose — with full ECMA-426 compliance.

    Rust 9 1

  3. fallow-rs/oxc-coverage fallow-rs/oxc-coverage Public

    Unofficial Istanbul-compatible coverage toolchain built on Oxc: instrumentation, source-map remapping, V8 conversion, reporters

    Rust 27 1

  4. fallow-rs/docs fallow-rs/docs Public

    Documentation for fallow, codebase intelligence for TypeScript and JavaScript. Published at docs.fallow.tools.

    MDX 10 4

  5. fallow-rs/fallow-skills fallow-rs/fallow-skills Public

    Agent skills for fallow. They teach coding agents (Claude Code, Codex, Cursor, and others) to check health, complexity, duplication, architecture, styling drift, and unused code with fallow.

    JavaScript 134 9

  6. BartWaardenburg BartWaardenburg Public

    GitHub profile README