# haskell/haskell-mode

Emacs mode for Haskell

Repository: https://github.com/haskell/haskell-mode
Canonical: https://ross.abutalabs.com/products/haskell-mode
Homepage: http://haskell.github.io/haskell-mode/
Language: Emacs Lisp
License: GPL-3.0
License Family: copyleft
Topics: emacs, haskell
Last push: 2026-06-19T11:59:05+00:00

## Health v2 (maintenance only)
Score: 62/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 88, release rhythm 8, longevity 100
- inputs: {"age_days": 5285, "days_push": 75, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1389, forks 354 (observed 2026-08-28T04:04:35.359936+00:00)

## What it is
Haskell Mode is an Emacs major mode for editing, developing, and debugging Haskell programs. It provides syntax highlighting, indentation, and integration with Haskell tooling, installable via MELPA.

## Use cases
- edit Haskell code in Emacs with syntax highlighting
- indent and format Haskell source files
- debug Haskell programs from Emacs
- integrate Haskell build tools into my editor
- set up a Haskell development environment in Emacs

## When to choose
- you use Emacs as your primary editor and write Haskell
- you want a mature, community-maintained Haskell editing mode
- you prefer lightweight editor tooling over a full IDE

## When to avoid
- you use Vim, VS Code, or another editor instead of Emacs
- you want a full standalone Haskell IDE
- you rely primarily on LSP-based tooling and prefer haskell-language-server's Emacs client setup alone

## Facets
- artifact type: plugin
- maturity: active
- function: editor, developer-tools
- domain: programming-languages, text-editors, developer-tools
- platform: editor-plugin, cross-platform
- tags: emacs, emacs-lisp, haskell, syntax-highlighting, ide-support, melpa

## Member repositories
- haskell/haskell-mode (main) score 62

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:35.359936+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 2026-08-30T04:39:42.658635+00:00, confidence not recorded.
  - readme: https://github.com/haskell/haskell-mode (fetched 2026-08-28T04:04:35.359936+00:00, sha 27a44ae97d6f)
  - homepage: http://haskell.github.io/haskell-mode/ (fetched 2026-08-29T11:54:52.056440+00:00, sha c9e22b093bfe)
- Data as of 2026-08-30T08:39:29.467469+00:00.