/**
 * SMI-5456: Tests for the agent-mediation marker channel.
 *
 * Covers the P-5 shared-state invariants for the session marker file:
 *   - `_meta` wins over the marker file (per-field precedence)
 *   - marker file alone works
 *   - neither present ⇒ fields default false / false / null
 *   - stale (past-TTL) marker is ignored
 *   - corrupt / malformed marker file is ignored, never throws
 *   - `_meta` extraction is defensive (junk types dropped)
 */
export {};
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