Sauve Jazz Extension

This skill is the Sauve integration layer.

It is not the canonical source for generic Jazz runtime/loading/schema theory.

Route generic Jazz concerns to focused skills

• runtime/WASM/worker bootstrap → jazz-runtime-wasm-compat
• loading/deep resolve/subscriptions → jazz-loading-subscriptions
• schema evolution and migrations → jazz-schema-migrations
• multi-domain architecture → jazz-sync-architecture
• Sauve worker/proxy boundaries → jazz-sauve-worker-proxy

This skill should focus on Sauve-specific concerns

• MV3 service-worker-first architecture in Sauve codebase
• popup proxy context and message protocol contracts
• labels and collections systems (labels:/..., RSS/source group patterns)