# hyperledger-archives/composer

:warning: :warning: :warning: Hyperledger Composer has been deprecated :warning: :warning: :warning:

Repository: https://github.com/hyperledger-archives/composer
Canonical: https://ross.abutalabs.com/products/hyperledger-archives-composer
Homepage: https://wiki.hyperledger.org/display/composer
Language: JavaScript
License: NOASSERTION
License Family: other
Topics: hyperledger, composer, blockchain, distributed-ledger
Archived: true
Last push: 2020-03-08T08:19:46+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3505, "days_push": 2369, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1610, forks 715 (observed 2026-08-28T04:05:10.881274+00:00)

## What it is
Hyperledger Composer is a JavaScript application development framework for building blockchain applications on Hyperledger Fabric, providing a business-network modeling language, CLI tools, and a web playground. The project was officially deprecated in August 2019 and its capabilities were folded into Hyperledger Fabric v1.4+.

## Use cases
- build blockchain applications on hyperledger fabric
- model a business network for a distributed ledger
- generate REST APIs for a blockchain network
- prototype smart contracts with a modeling language
- learn blockchain development with a playground

## When to choose
- maintaining or reading a legacy codebase that already uses Composer
- studying historical blockchain application frameworks
- submitting patches to an existing Composer deployment

## When to avoid
- starting any new blockchain project - it is deprecated with no active support
- building on Hyperledger Fabric v1.4+ - use the native Fabric SDK and programming model instead
- expecting bug fixes or GitHub issue support from maintainers

## Facets
- artifact type: framework
- maturity: abandoned
- function: sdk, developer-tools, workflow-automation
- domain: blockchain, developer-tools, microservices
- platform: cross-platform
- tags: hyperledger, hyperledger-fabric, blockchain, deprecated, smart-contracts, distributed-ledger, nodejs, javascript

## Member repositories
- hyperledger-archives/composer (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:10.881274+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 2026-08-30T03:51:14.510438+00:00, confidence not recorded.
  - readme: https://github.com/hyperledger-archives/composer (fetched 2026-08-28T04:05:10.881274+00:00, sha 69610ba1bcbf)
  - homepage: https://wiki.hyperledger.org/display/composer (fetched 2026-08-29T11:23:39.002692+00:00, sha f52bf5c3dff8)
- Data as of 2026-08-30T08:39:29.467469+00:00.