Add CONTEXT_RUNTIME_ACTIVE_ENV bundle and zero-LLM active probe covering
MCP compact, zvec, and headroom proxy readiness while keeping memory
injection on shadow.
Co-authored-by: Cursor <cursoragent@cursor.com>
Provide context-runtime-profile simulation for gateway shadow events,
run-context-runtime-offline.mjs for zero-LLM verification, and a local
dev guide for user-led shadow self-tests later.
Co-authored-by: Cursor <cursoragent@cursor.com>