# Developer onboarding Prerequisites - .NET 10 SDK - Node and npm for UI development - Docker for local infrastructure Local stack - PostgreSQL, Valkey, and RustFS are required. - Services use layered configuration (env, appsettings, YAML). Common workflows - Run the stack with compose or Helm profiles. - Debug a single service by running it locally and pointing others to localhost. - Use deterministic fixtures for replay and policy validation. Contribution basics - Follow coding standards and test suite overview. - Keep outputs deterministic and offline friendly. - Update docs when contracts or workflows change. Related references - docs/DEVELOPER_ONBOARDING.md - docs/onboarding/dev-quickstart.md - docs/onboarding/contribution-checklist.md - docs/18_CODING_STANDARDS.md - docs/19_TEST_SUITE_OVERVIEW.md