1. Temporal data filtering
Every fact and relationship edge is tagged with a first-revealed episode. Queries hard-filter to knowledge ≤ cutoff.
Sacred architecture
Cutoff law
Absolute hard cutoff at the end of the previous episode. No events, status changes, implications, or “this becomes important later” framing past that line.
2. Constrained generation / retrieval
Desk chat only retrieves pre-cutoff chunks. Future-leak phrasings are refused in the open.
3. Post-generation verification
Claim-check against the temporal index before publish (production pipeline).
4. Human review
Gold packs for popular titles get editorial sign-off.
5. User reporting
One-tap leak report on every pack. Confirmed leaks become regression cases.
6. Visible stamp
Every pack shows the exact cutoff episode as a rubber-stamp trust mark.
Full write-up: docs/ANTI-SPOILER.md · product spec