# rvben/rumdl

Fast Markdown linter and formatter written in Rust

Repository: https://github.com/rvben/rumdl
Canonical: https://ross.abutalabs.com/products/rumdl
Language: Rust
License: MIT
License Family: permissive
Topics: formatter, linter, markdown, rust, cli, developer-tools
Last push: 2026-08-26T19:09:53+00:00

## Health v2 (maintenance only)
Score: 83/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 39
- inputs: {"age_days": 551, "days_push": 7, "days_rel": 7, "gap_med": 1.0, "n_releases_24m": 373}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1451, forks 77 (observed 2026-08-28T04:04:46.046564+00:00)

## What it is
rumdl is a fast Markdown linter and formatter written in Rust, inspired by ruff's approach to Python linting. It provides 82 lint rules, automatic fixing, TOML-based configuration, and support for multiple Markdown flavors like GFM, MkDocs, MDX, Quarto, and MyST.

## Use cases
- lint markdown files in my repo
- auto-fix markdown style violations
- format markdown documentation consistently
- enforce markdown best practices in CI
- lint MkDocs or MDX flavored markdown
- replace markdownlint with a faster tool

## When to choose
- you need very fast Markdown linting and formatting in Rust
- you want a single zero-dependency binary installable via cargo, pip, or standalone binaries
- you use Markdown flavors like GFM, MkDocs, MDX, Quarto, or MyST
- you want CI/CD integration with non-zero exit codes on violations

## When to avoid
- you need linting for languages other than Markdown
- you require a plugin ecosystem or rules not covered by rumdl's 82 rules
- you depend on markdownlint-specific configuration files without migration support

## Facets
- artifact type: cli-tool
- maturity: active
- function: linter, formatter, cli, markdown, developer-tools
- domain: developer-tools, documentation
- platform: cli, cross-platform, rust, python
- tags: markdown-linter, markdown-formatter, markdownlint-alternative, single-binary, ci-friendly, mkdocs, mdx, gfm, command-line

## Member repositories
- rvben/rumdl (main) score 83

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:46.046564+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:35:52.718658+00:00, confidence not recorded.
  - readme: https://github.com/rvben/rumdl (fetched 2026-08-28T04:04:46.046564+00:00, sha 4dc9fffe09ca)
- Data as of 2026-08-30T08:39:29.467469+00:00.