# Convergence Rationale (C0)

> For the complete documentation index, see [llms.txt](https://deploy-preview-472--lucky-concha-f3599f.netlify.app/llms.txt).

State `004-containerized-compose-runtime` is the C0 convergence baseline.

Rationale:

*   It is the first containerized, reproducible runtime that all later tracks can inherit from.
    
*   It preserves the baseline functional behavior while introducing a stable deployment substrate.
    
*   It provides the cleanest handoff point for architecture, functional, and platform deltas.
    
*   As the convergence baseline, it establishes the `C0+` CI policy: convergence states publish container images via build/publish workflow plus GHCR run-bundle artifacts.
    
*   It keeps generated patchsets aligned with current dependency security targets so descendant convergence states inherit a clean runtime baseline.
    
*   Issue #465 upgrades the inherited Java baseline to public Spring Boot 4.0.8, Spring Framework 7.0.9, Data JPA 4.0.7, and Tomcat 11.0.26. Jackson 3 and Springdoc 3 compatibility changes preserve the existing HTTP and messaging contracts without adding security suppressions.
    
*   Issue #466 makes the C0 deployment boundary require exact-snapshot build/test/security evidence and scanned image digests. Descendant demo states inherit these checks through canonical generators while retaining one snapshot commit per generated branch.
    
*   Generated CI workflows come from the canonical CI asset installer after state overlays; historical workflow patches in states 004–007 are omitted so dependency remediation and deployment hardening compose without restoring stale checks.