Permanent regression check (Phase 1, Test 5): a fixed set of series and a fixed historical window, re-diffed on every harvest. Any value that changes for a period already published proves silent restatement on FactIQ's side.
Baseline established: 2026-07-28. See findings/drift-baseline.json for
the exact snapshot (3 series: BLS nonfarm payrolls, BEA real GDP % change,
China Customs preliminary total exports — chosen to span three unrelated
providers). Diff logic lives in src/validation/drift_check.py
(diff_snapshots), fully deterministic, no LLM in the comparison.
Open issue: this is not yet running automatically. FactIQ is only reachable via MCP tool calls inside a Claude Code session in this project — there's no plain REST endpoint for a standalone cron process to call. The Phase 3 harvester needs to resolve how a scheduled process authenticates to FactIQ before this check can run on a real daily cadence; until then, new entries below are appended from manually re-run snapshots.
No entries yet below this line — the first re-diff will be the first line of real evidence either way.
No restatements detected against the baseline.
Independent personal project by Ian Bergin. Not affiliated with, endorsed by or sponsored by FactIQ, which is used as one of several data sources.
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