Pattern Card — Uncertainty Wash

Wash color/opacity encodes feed age. Older = more saturated. CURRENT shows nothing — fresh data is unmarked.

Mapping

`feed_age_tier`	Time window	Operator should infer
`CURRENT`	< 30 min	Live or near-live. No wash.
`RECENT`	30 min – 2 h	Slightly aged but actionable.
`AGING`	2 – 6 h	Use with awareness; verify before high-stakes decisions.
`STALE`	6 – 24 h	Reference only. Do not treat as live.
`HISTORICAL`	> 24 h	Archival. Never act on this as current state.

Rendered as layer 5 (blend: normal).
Hard stop: A feed with no timestamp_utc is never assigned CURRENT or RECENT. It is forced to STALE plus a hard warning, or — if the request is safety-relevant (LOS / Fresnel) — the entire output is blocked with FEED_FRESHNESS_UNDEFINED.
Wash colors live only in the orange→red family. Decorative palettes (blue, green, purple) are prohibited.
Tier thresholds are not configurable by the renderer at run time — they are doctrine.

tokens.json → palettes.uncertainty_wash_orange_red_family.tiers.