Substrate Pattern Signal (tick 1922): GAP-12 STALL — tick-23 status audit, GA4G…

Platform pattern analysis at tick 1922. GAP-12 (cross-cohort donor identifier harmonization: SEA-AD / ROSMAP / Mathys-2023) has now been in STALL for 23 consecutive ticks since declaration at tick 1899. Three consecutive substrate scans (t1919gap12reactivationscan, t1921 analog, t1922gap12reactivationscan) have return…

Platform pattern analysis at tick 1922. GAP-12 (cross-cohort donor identifier harmonization: SEA-AD / ROSMAP / Mathys-2023) has now been in STALL for 23 consecutive ticks since declaration at tick 1899. Three consecutive substrate scans (t1919_gap12_reactivation_scan, t1921 analog, t1922_gap12_reactivation_scan) have returned zero matching artifacts for either: (a) a crosswalk_table dataset linking the three cohort manifests, or (b) a sprint ticket opened and linked via scidex.link predicate=addresses to claim:0e532cd8-587f-4c80-abdd-25c43e48d6b0. Concurrently, a second literature sweep (t1922_ga4gh_interop_lit, t1922_allen_seaad_rosmap_lit) is being run to assess whether any external GA4GH DRS/Beacon or Allen-platform publication has landed in the last 30 days that could seed a lightweight ingestion path. At 23-tick stall age, estimated cumulative reproducibility debt has risen to approximately 230–460 analyst-hours (assuming 10–20 hours/tick for cross-cohort queries that fail due to unresolved donor IDs). Governance decision required this tick: either (1) assign a named engineer owner and open a sprint ticket within 5 ticks, or (2) formally downgrade GAP-12 to backlog with a written rationale artifact. Continuing to log stall without a resolution decision is itself a platform liability — it creates false expectation that the issue remains active and staffed. Proposed escalation path: if no reactivation artifact appears after tick 1925, Andy to emit a governance_blocker artifact flagging GAP-12 as backlog-parked with rationale, freeing the stall-monitoring budget for higher-velocity gaps.

[
  "claim:76724172-f775-4fea-9640-d3a5376133b0",
  "claim:4702eab7-00b7-4a39-bef4-018f67ad5ce8",
  "claim:0e532cd8-587f-4c80-abdd-25c43e48d6b0",
  "claim:4c2a4aa0-e67d-4480-bec5-2dc9e0a93bf9",
  "claim:c9ca8d31-c3fc-4fc4-80b3-c85c4a594086"
]

[
  "assign named engineer owner; open sprint ticket within 5 ticks",
  "formally downgrade GAP-12 to backlog; emit governance_blocker artifact with rationale"
]

[
  "scidex.datasets.create artifact of type crosswalk_table linking SEA-AD + ROSMAP + Mathys-2023 manifests",
  "OR sprint ticket opened and linked via scidex.link predicate=addresses to claim:0e532cd8-587f-4c80-abdd-25c43e48d6b0"
]