generated: '2026-09-17'
method: searched
source: >-
  proxy.golang.org, crates.io and api.github.com release metadata for the first-party
  buildpacks/* repositories linked from apis.yml, plus the pack install page at
  https://buildpacks.io/docs/for-platform-operators/how-to/integrate-ci/pack/
note: >-
  Cloud Native Buildpacks is a specification project, so its "SDKs" are the libraries that let
  an author WRITE a buildpack (libcnb in Go and Rust) and the reference tools that RUN the
  lifecycle (pack, lifecycle). None of them is a client of the registry HTTP API — the only
  first-party consumer of registry.buildpacks.io is the pack CLI itself.
packages:
- name: github.com/buildpacks/pack
  registry: go
  official: true
  language: Go
  role: reference platform / CLI implementing the Platform Interface Specification
  url: https://pkg.go.dev/github.com/buildpacks/pack
  repository: https://github.com/buildpacks/pack
  version: v0.40.9
  published: '2026-08-09'
  source: https://proxy.golang.org/github.com/buildpacks/pack/@latest
- name: github.com/buildpacks/lifecycle
  registry: go
  official: true
  language: Go
  role: reference lifecycle binaries (analyzer, detector, restorer, extender, builder, exporter, rebaser, launcher)
  url: https://pkg.go.dev/github.com/buildpacks/lifecycle
  repository: https://github.com/buildpacks/lifecycle
  version: v0.21.20
  published: '2026-09-15'
  source: https://proxy.golang.org/github.com/buildpacks/lifecycle/@latest
- name: github.com/buildpacks/libcnb
  registry: go
  official: true
  language: Go
  role: Go library for authoring buildpacks against the Buildpack API
  url: https://pkg.go.dev/github.com/buildpacks/libcnb
  repository: https://github.com/buildpacks/libcnb
  version: v1.30.4
  published: '2024-10-07'
  source: https://proxy.golang.org/github.com/buildpacks/libcnb/@latest
  note: >-
    DECAY SIGNAL — the first-party Go authoring library has not published a release since
    2024-10-07, while the lifecycle it targets released v0.21.20 on 2026-09-15 and the
    Buildpack API has moved to 0.12.
- name: libcnb
  registry: crates.io
  official: false
  language: Rust
  role: Rust framework for authoring buildpacks
  url: https://crates.io/crates/libcnb
  repository: https://github.com/heroku/libcnb.rs
  version: 0.31.1
  published: '2026-08-03'
  source: https://crates.io/api/v1/crates/libcnb
  note: >-
    Maintained by Heroku at github.com/heroku/libcnb.rs, not by the buildpacks GitHub
    organization. apis.yml previously pointed an SDKs property at
    https://github.com/buildpacks/libcnb-rs, which returns 404 — that repository does not exist.
- name: libcnb-package
  registry: crates.io
  official: false
  language: Rust
  role: cross-compilation / packaging helper for libcnb.rs buildpacks
  url: https://crates.io/crates/libcnb-package
  repository: https://github.com/heroku/libcnb.rs/tree/main/libcnb-package
  version: 0.31.1
  published: '2026-08-03'
  source: https://crates.io/api/v1/crates/libcnb-package
- name: libcnb-test
  registry: crates.io
  official: false
  language: Rust
  role: integration-test harness for libcnb.rs buildpacks
  url: https://crates.io/crates/libcnb-test
  version: 0.31.1
  published: '2026-08-03'
  source: https://crates.io/api/v1/crates/libcnb-test
- name: buildpacksio/lifecycle
  registry: docker
  official: true
  language: OCI image
  role: the reference lifecycle distributed as a container image
  url: https://hub.docker.com/r/buildpacksio/lifecycle
  version: null
  published: '2026-09-16'
  source: https://hub.docker.com/v2/repositories/buildpacksio/lifecycle/tags
  note: >-
    version null on purpose — the tag listing returned by Docker Hub on 2026-09-17 surfaced only
    cosign `sha256-*.sig` tags in its first page, so no semver tag was read from the registry
    itself. The image tracks the lifecycle release train (v0.21.20, 2026-09-15).
absent:
- name: libcnb.net
  language: .NET
  searched:
  - https://api.github.com/repos/buildpacks-community/libcnb.net
  - https://azuresearch-usnc.nuget.org/query?q=libcnb
  finding: >-
    apis.yml carried an SDKs pointer at https://github.com/buildpacks-community/libcnb.net; the
    repository 404s and NuGet search for "libcnb" returns 0 hits. Recorded as gone rather than
    guessed at a successor.
- registries_checked_with_no_first_party_package:
  - npm (registry.npmjs.org — no @buildpacks scope)
  - PyPI
  - Maven Central
  - NuGet
  - RubyGems
  - Packagist