Fallow adds Rust-speed checks for TS/JS

Fallow looks like the right kind of tooling for teams drowning in fast-written, low-quality code: opinionated, fast, and good enough to run everywhere instead of just during periodic cleanup.

• –Rust-native execution makes it credible for large repos where slower JS-based analyzers become background-noise tools nobody runs.
• –The combination of dead-code detection, duplication, complexity, and boundary rules is stronger than single-purpose linters because it catches both waste and architectural drift.
• –Autofix plus CI output makes it usable as a gate, not just a report generator.
• –The agent-friendly angle is the most important differentiator: if AI is producing more code, the cleanup tool also needs to fit AI workflows.
• –The optional runtime layer adds deletion confidence, which matters when static analysis alone is too conservative.