.github — Graphene CI organization anchor

Organization-level GitHub files shared by the Graphene CI repositories.

• profile/README.md is the concise public organization profile and points to the product documentation in graphene-ci/docs.
• CONTRIBUTING.md and PULL_REQUEST_TEMPLATE.md define the common contribution workflow.

Product documentation does not live here. The current model, user guides, and reference material belong to the docs repository; repository READMEs only describe their own deliverable and development workflow.