d21 signal_continuity
Signal archive compound: which Daily Agent Signal threads held, rose, appeared or faded over the last N stored days. One row per signal id with first/last seen, days present, rank path, vs_prior path and latest judgment, plus ids grouped by trajectory. Body { days: 1..90 }. Not full briefs (that is signal_history). Free first: archive_day_count at /health, /v1/signal_continuity/example.
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Daily probe success ratio, last 30 days. Last probed 2026-10-27.
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Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.