Module ai_discovery 

AI-discovery protocol validation (depends on E8 — issue #552).

Asserts presence + schema-validity of:

• llms.txt (already shipped in v0.0.43).
• agents.txt (E8).
• .well-known/ai-plugin.json (E8).

When the E8-produced files are absent, the gate emits info-level findings rather than errors — those upgrade to enforcement once issue #552 (E8) merges.

Structs

AiDiscoveryGate

AI-discovery protocol gate.