# BetterThanTomorrow/calva

Clojure & ClojureScript Interactive Programming for VS Code

Repository: https://github.com/BetterThanTomorrow/calva
Canonical: https://ross.abutalabs.com/products/calva
Homepage: https://marketplace.visualstudio.com/items?itemName=betterthantomorrow.calva
Language: TypeScript
License: NOASSERTION
License Family: other
Last push: 2026-08-25T09:31:52+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 3093, "days_push": 8, "days_rel": 8, "gap_med": 2.0, "n_releases_24m": 129}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2082, forks 249 (observed 2026-08-28T04:06:11.694775+00:00)

## What it is
Calva is a Visual Studio Code extension providing a REPL-powered IDE for Clojure and ClojureScript development. It bundles inline evaluation, structural (Paredit) editing, formatting, linting via clj-kondo, a debugger, test running, and refactoring, powered by cider-nrepl and clojure-lsp.

## Use cases
- set up a Clojure development environment in VS Code
- evaluate Clojure code inline from the editor
- connect to a project REPL with jack-in
- structurally edit Lisp code with Paredit
- run Clojure tests from the editor
- lint Clojure code with clj-kondo
- debug Clojure and ClojureScript programs

## When to choose
- you use VS Code and want a full-featured Clojure/ClojureScript IDE
- you are new to Clojure and want an easy on-ramp with REPL-driven development
- you want integrated evaluation, Paredit, formatting, and linting without configuring separate tools

## When to avoid
- you use Emacs and prefer CIDER
- you develop Clojure in IntelliJ with Cursive
- you need an IDE for languages other than Clojure/ClojureScript

## Facets
- artifact type: plugin
- maturity: active
- function: editor, testing, linter, formatter
- domain: developer-tools, programming-languages, text-editors
- platform: editor-plugin, cross-platform
- tags: clojure, clojurescript, vscode-extension, repl-driven-development, paredit, nrepl, interactive-programming, debugger

## Member repositories
- BetterThanTomorrow/calva (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:11.694775+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 2026-08-30T02:55:54.463792+00:00, confidence not recorded.
  - readme: https://github.com/BetterThanTomorrow/calva (fetched 2026-08-28T04:06:11.694775+00:00, sha 8474296f340a)
  - homepage: https://marketplace.visualstudio.com/items?itemName=betterthantomorrow.calva (fetched 2026-08-29T10:36:12.789667+00:00, sha 3683967d0d16)
- Data as of 2026-08-30T08:39:29.467469+00:00.