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history_for() now enumerates run dirs' results.json, groups by recipe, sorts newest-first by finished timestamp (mixed numeric+named ids — timestamp is the only correct key), caps at HISTORY_CAP=30, skips malformed/empty/no-recipe dirs. Overview + badges + /runs + security guards + stdlib-only unchanged. Local verify: 13/13 unit tests; full-fixture vs 308 real results.json → bluesky-pds=8 in exact ts order, plausible capped 30 newest, edge dirs skipped. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>