Stale Market Data Drill

What happened

tc drill stale-market-data --run-id <run_id> runs a deterministic local reconciliation using stale freshness fixture timestamps.

Expected behavior

• Command exits 0.
• Drill report is written to artifacts/runs/<run_id>/drills/stale_market_data.json.
• Reconciliation status in the report is warning.
• If journal.jsonl exists, a compact failure_drill_executed event is appended.

How to inspect artifacts

• Open artifacts/runs/<run_id>/drills/stale_market_data.json.
• Confirm:
• outcome=expected_warning
• status=completed
• summary.warning >= 1
• Optionally inspect artifacts/runs/<run_id>/reconciliation_result.json for reconciliation details.

What a real production system would do

• Validate feed health from multiple channels.
• Trigger alerting and failover logic.
• Gate order placement until freshness recovers.

What this lab intentionally does not do

• No exchange connectivity.
• No live market data subscription.
• No automatic kill switch trigger.
• No order cancel/flatten actions.