Five production-tested CLI tools. Go, Rust, and TypeScript. Every repo ships with passing tests.

These are the dev tools I use daily - cleaned up and packaged so you can read them, fork them, and adapt them in an afternoon.

Stop rebuilding a markdown chunker for RAG. Stop checking npm package sizes one browser tab at a time. Stop reading IAM policy JSON line by line to work out blast radius.

WHAT’S INSIDE

1. md-vector-chunker (Go)
   AST-based markdown chunker for LLM RAG. Splits by header hierarchy, not naive character counts, so embeddings stay coherent. Tests included.

2. bundle-phobia-cli (Go)
   Check npm dependency sizes concurrently from your terminal. Tests included.

3. iam-policy-visualizer (Rust)
   Parse AWS IAM JSON and render effective blast radius as a Mermaid diagram. Fast native binary.

4. tz-meeting-scheduler (Go)
   Convert meeting times across timezones into a Markdown table in one command. Tests included.

5. jwt-decoder-extension (TypeScript)
   Fully offline JWT decoder browser extension. Nothing leaves your machine.

WHO IT’S FOR
Backend and platform engineers who prefer a terminal to a dashboard. Anyone building RAG or LLM tooling. Developers who want to read real working Go and Rust instead of another tutorial.

Requires Go 1.21+, Rust stable, Node 18+.