# haskell/haskell-ide-engine

The engine for haskell ide-integration. Not an IDE

Repository: https://github.com/haskell/haskell-ide-engine
Canonical: https://ross.abutalabs.com/products/haskell-ide-engine
Language: Haskell
License: BSD-3-Clause
License Family: permissive
Topics: ide, haskell, haskell-ide, lsp, language-server-protocol, ghc
Archived: true
Last push: 2020-12-23T06:21:46+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3968, "days_push": 2079, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2354, forks 205 (observed 2026-08-28T04:06:40.502992+00:00)

## What it is
Haskell IDE Engine (HIE) was a Language Server Protocol server providing Haskell-specific functionality to editors and IDEs. It is now deprecated and superseded by haskell-language-server.

## Use cases
- integrate Haskell tooling into editors via LSP
- get Haskell completions and diagnostics in VS Code
- use Haskell language features in Sublime Text
- set up a Haskell IDE server for Emacs or Vim

## When to choose
- studying the historical origins of Haskell LSP support
- working with a legacy setup that predates haskell-language-server

## When to avoid
- starting any new Haskell IDE integration - use haskell/haskell-language-server instead
- needing support for recent GHC versions
- expecting maintenance, bug fixes, or releases

## Facets
- artifact type: library
- maturity: abandoned
- function: developer-tools, editor
- domain: developer-tools, programming-languages, text-editors
- platform: windows, cross-platform
- tags: haskell, language-server-protocol, deprecated, ghc, ide-integration, lsp, linux, macos

## Member repositories
- haskell/haskell-ide-engine (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:40.502992+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 2026-08-30T02:36:28.005194+00:00, confidence not recorded.
  - readme: https://github.com/haskell/haskell-ide-engine (fetched 2026-08-28T04:06:40.502992+00:00, sha 461e6ba87fd4)
- Data as of 2026-08-30T08:39:29.467469+00:00.