Three knowledge layers with promotion logic, platform-neutral canonical
content with thin adapters, MCP gateway as the vendor bridge, two
enrichment paths. Schemas encode the trust boundary (customer/project
forbidden in layer 1). Neutrality audit: clean (D9).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PDKeXvpT6tENSvyQGLV1Uq