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Marc-André BombeckandClaude Opus 4.8
6de5de0284
The dashboard snapshot lives in the analytics cache bucket, which had no
stale window, and every measurement write hard-evicted the whole
${userId}| prefix. A high-frequency iOS Apple-Health sync therefore
busted the snapshot into a cold rebuild on the next read all day long
(the same class as the v1.8.7 insight-cache eviction).
Give the analytics bucket a stale-while-revalidate window, read the
snapshot via cachedSwr, and switch the measurement-write invalidation
from a hard deleteByPrefix to markStaleByPrefix. The snapshot now serves
the prior value immediately while a single background recompute warms a
fresh one. Slim / thick / summary cells read via plain cached are
unaffected: a marked-stale entry has expiresAt === now, so their next
read is a clean miss and rebuilds fresh. Widget reorder keeps its hard
point-evict so a layout change paints synchronously; mood and medication
writes keep their hard analytics sweep.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>