Goal
Add Sidecar as a first-class PatternKit pattern for composing companion process or companion service capabilities around an application boundary.
Required scope
- Fluent runtime API for registering sidecar capabilities and health/status probes.
- Source-generated factory path with diagnostics for invalid sidecar declarations.
- TinyBDD runtime, generator, and real-world example coverage.
- Importable IServiceCollection and Microsoft.Extensions.Hosting example.
- User guide, generator guide, example docs, catalog coverage, and production readiness entries.
- CI must land green on main.
Goal
Add Sidecar as a first-class PatternKit pattern for composing companion process or companion service capabilities around an application boundary.
Required scope