clawX/harness/specs/rules/host-events-fallback-policy.md

id, title, type, appliesTo, requiredTests

id	title	type	appliesTo	requiredTests
host-events-fallback-policy	Host Events Fallback Policy	ai-coding-rule	gateway-backend-communication	tests/unit/host-events.test.ts

Host event subscriptions must use IPC mappings by default.

Unknown host events must not fall back to SSE unless clawx:allow-sse-fallback is explicitly enabled inside src/lib/host-events.ts.

New user-visible gateway, channel, OAuth, or QR events should be added to the host event IPC mapping instead of relying on EventSource fallback.