# Step 4 — Implementation Detail

1. Added tenant equality validation before publication to prevent cross-tenant writes.
2. Published normalized documents through an injected knowledge-store port.
3. Recorded publication audit events containing tenant, run, action, count, and timestamp without content or secrets.
4. Implemented retention-based purge of expired deleted-document tombstones.
5. Documented managed secret usage, ACL filtering expectations, transport/storage protection, and lifecycle rules.