openai/gpt-chat-latest → B (9:1)

Side B implements a real behavioral change by enforcing valid vote ratios across the DSL parser, HTML POST handler, and reducer, preventing zero-weight graph edges and capping ratios at 100, while adding unit, integration, and browser test updates to lock in the behavior. Side A mainly adds a planning document plus a thin `RouteContext` wrapper and re-export without migrating callers or changing core functionality, so its lasting project impact is much smaller.