# 30-Nov-2025 · Unknowns Decay & Triage Heuristics

**Why now:** Stale “unknown” findings create noise; we need deterministic decay and triage rules with UI/export artifacts.

## Scope
- Define confidence decay card, triage queue UI, and export artifacts for planning.
- Map to runtime signals sprint (`SPRINT_0140_0001_0001_runtime_signals.md`) and docs tracker row 20.

## Required artefacts (MVP)
- This brief plus references to UnknownsRegistry docs (to be expanded).
- UI/export snapshot expectations and deterministic decay logic description.

## Determinism & Offline
- Decay windows and thresholds must be deterministic; exports should be reproducible without live dependencies.

## Next actions
- Land UI mock/export schema; link into sprint Decisions & Risks and module docs once available.