# Credo

5 Hacker News commenters recommended Credo and 0 criticized it, November 2025 to November 2026. It was recommended in 6 of 13 months.

**Verdict:** Elixir linter that enforces code style and steers LLM coding agents with deterministic checks; people pair it with dialyzer and tidewave.

## Why people recommend it

- Strong style enforcement for Elixir (2 comments): "The tooling for inspecting and enforcing style (tidewave, credo, dialyzer, Dan's "vibe" ecosystem tools) is far beyond what I see in other ecosystems" ([source](https://news.ycombinator.com/item?id=48287224)) "Even more so when one starts adding packages like credo, ex_slop, and boundary to run deterministically and steer the LLM." ([source](https://news.ycombinator.com/item?id=48527504))
- Deterministic feedback loop for LLMs (2 comments): "Even more so when one starts adding packages like credo, ex_slop, and boundary to run deterministically and steer the LLM." ([source](https://news.ycombinator.com/item?id=48527504)) "The combination of credo, dialyzer, and tidewave means you have an iterative feedback loop" ([source](https://news.ycombinator.com/item?id=46930925))
- Extensible with custom rules (2 comments): "Credo has https://github.com/elixir-vibe/ex_slop added to it." ([source](https://news.ycombinator.com/item?id=50030041)) "so it would be creating a custom Credo rule" ([source](https://news.ycombinator.com/item?id=48629855))
- Combines well with other tools (2 comments): "The combination of credo, dialyzer, and tidewave means you have an iterative feedback loop" ([source](https://news.ycombinator.com/item?id=46930925)) "Even with my eyes constantly in the logs window, credo + ex_dna + ash_credo" ([source](https://news.ycombinator.com/item?id=47666675))

## Alternatives hackers recommend

- [Ruff](https://hackerapproved.com/p/ruff.md): 115 recommend
- [Clippy (Rust linter)](https://hackerapproved.com/p/clippy.md): 58 recommend
- [ESLint](https://hackerapproved.com/p/eslint.md): 32 recommend
- [Biome](https://hackerapproved.com/p/biome.md): 23 recommend
- [Oxlint](https://hackerapproved.com/p/oxlint.md): 20 recommend

## Cite as

Hacker Approved, "Credo", https://hackerapproved.com/p/credo/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).