# lamdu/lamdu

lamdu - towards the next generation IDE

Repository: https://github.com/lamdu/lamdu
Canonical: https://ross.abutalabs.com/products/lamdu
Homepage: https://www.lamdu.org
Language: Haskell
License: GPL-3.0
License Family: copyleft
Topics: integrated-development-environment, programming-language, programmer-tool, projectional-editor, structure-editor, wytiwys
Last push: 2026-08-21T09:21:50+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 8, longevity 100
- inputs: {"age_days": 5431, "days_push": 12, "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 1899, forks 77 (observed 2026-08-28T04:05:51.428062+00:00)

## What it is
Lamdu is a next-generation live programming environment combining a projectional/structure editor with its own programming language, offering syntax-error-free editing, automatic formatting, rich static typing with inference, and live evaluation annotations. It is a technology preview written in Haskell and not yet recommended for production use.

## Use cases
- try a structure editor instead of text-based coding
- experiment with live programming environments
- write code without syntax errors using a projectional editor
- explore a statically typed functional language with instant evaluation feedback
- code in a language where identifiers are a display preference (internationalization)
- research alternatives to text-file-based programming languages

## When to choose
- you want to explore or contribute to experimental live programming and structure editing research
- you want syntax-error-free editing with continuous evaluation of subexpressions
- you need a programming environment with built-in internationalization of code display

## When to avoid
- you need a production-ready language or IDE for real projects
- you rely on text-based workflows like version control diffs, grep, or standard tooling
- you need a mature ecosystem with libraries and community support

## Facets
- artifact type: application
- maturity: experimental
- function: editor, interpreter, programming-language, developer-tools, internationalization
- domain: programming-languages, developer-tools, text-editors
- platform: windows, cross-platform
- tags: projectional-editor, structure-editor, live-programming, wysiwys, functional-programming, haskell, next-generation-ide, technology-preview, localization, linux, macos, desktop

## Member repositories
- lamdu/lamdu (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:51.428062+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 2026-08-30T03:12:11.382066+00:00, confidence not recorded.
  - readme: https://github.com/lamdu/lamdu (fetched 2026-08-28T04:05:51.428062+00:00, sha 6db1e477782f)
  - homepage: https://www.lamdu.org (fetched 2026-08-29T10:51:19.354095+00:00, sha 822fc1a474c2)
- Data as of 2026-08-30T08:39:29.467469+00:00.