# elixir-lsp/elixir-ls

A frontend-independent IDE "smartness" server for Elixir. Implements the "Language Server Protocol" standard and provides debugger support via the "Debug Adapter Protocol"

Repository: https://github.com/elixir-lsp/elixir-ls
Canonical: https://ross.abutalabs.com/products/elixir-ls
Homepage: https://elixir-lsp.github.io/elixir-ls/
Language: Elixir
License: Apache-2.0
License Family: permissive
Topics: language-server-protocol, elixir, debug-adapter-protocol, language-server, lsp
Last push: 2026-08-16T05:57:37+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 87, longevity 100
- inputs: {"age_days": 3083, "days_push": 17, "days_rel": 84, "gap_med": 13.5, "n_releases_24m": 19}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1774, forks 226 (observed 2026-08-28T04:05:34.398971+00:00)

## What it is
ElixirLS is a language server for Elixir implementing the Language Server Protocol, providing IDE features like completion, go-to-definition, formatting, and Dialyzer-based analysis. It also includes a debug adapter implementing the Debug Adapter Protocol for step-through debugging of Elixir projects.

## Use cases
- get autocomplete and go-to-definition for Elixir in my editor
- run the Elixir compiler and see errors inline in my IDE
- integrate Dialyzer static analysis into my editor
- debug Elixir applications with breakpoints in VS Code
- format Elixir code automatically on save
- find all references to a function across a Mix project

## When to choose
- you write Elixir and want IDE features in any LSP-compatible editor
- you need step-through debugging for Elixir via DAP
- you want incremental Dialyzer analysis and inline warnings

## When to avoid
- your editor has no LSP client support
- you only need syntax highlighting without code intelligence
- you work primarily with Erlang rather than Elixir

## Facets
- artifact type: service
- maturity: active
- function: developer-tools, documentation, testing
- domain: developer-tools, programming-languages, text-editors
- platform: cross-platform, cli
- tags: elixir, language-server-protocol, lsp, debug-adapter-protocol, ide-support, dialyzer, mix

## Member repositories
- elixir-lsp/elixir-ls (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:34.398971+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 2026-08-30T03:25:23.148865+00:00, confidence not recorded.
  - readme: https://github.com/elixir-lsp/elixir-ls (fetched 2026-08-28T04:05:34.398971+00:00, sha 0501e52e4fe6)
  - homepage: https://elixir-lsp.github.io/elixir-ls/ (fetched 2026-08-29T11:03:53.345175+00:00, sha 587f0714c028)
- Data as of 2026-08-30T08:39:29.467469+00:00.