# documentcloud/jammit

Industrial Strength Asset Packaging for Rails

Repository: https://github.com/documentcloud/jammit
Canonical: https://ross.abutalabs.com/products/jammit
Homepage: http://documentcloud.github.io/jammit/
Language: Ruby
License: MIT
License Family: permissive
Last push: 2021-08-26T00:08:01+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 6143, "days_push": 1834, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1155, forks 195 (observed 2026-08-28T04:03:47.841184+00:00)

## What it is
Jammit is an asset packaging library for Rails that concatenates and compresses CSS and JavaScript, with ahead-of-time gzipping, JavaScript template support, and optional Data-URI/MHTML image embedding. It integrates with YUI Compressor, Closure Compiler, and UglifyJS.

## Use cases
- bundle and minify css and javascript in a rails app
- gzip assets ahead of time for faster page loads
- embed images as data uris in stylesheets
- package javascript templates in rails
- concatenate js files into a single package

## When to choose
- you maintain a legacy Rails 2 or Rails 3 app without the asset pipeline
- you need fine-grained YAML-configured asset packages with data-uri embedding

## When to avoid
- you use modern Rails, which has Sprockets/Propshaft built in
- you need an actively maintained tool - the last release was 2021 and the project is effectively dormant

## Facets
- artifact type: library
- maturity: abandoned
- function: build-tool, compression
- domain: web-development, frontend, developer-tools
- platform: ruby
- tags: asset-pipeline, rails, css, javascript, minification, asset-packaging, gzip, data-uri, web-server

## Member repositories
- documentcloud/jammit (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:47.841184+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 2026-08-30T06:32:12.716018+00:00, confidence not recorded.
  - readme: https://github.com/documentcloud/jammit (fetched 2026-08-28T04:03:47.841184+00:00, sha 017b0f64a008)
  - homepage: http://documentcloud.github.io/jammit/ (fetched 2026-08-29T12:37:25.517769+00:00, sha 4cbf9b3b47bc)
- Data as of 2026-08-30T08:39:29.467469+00:00.