Done. The FY2026 assumption register review is complete.

**Key findings:**
- **4 flagged assumptions**: 2 with stale reviews, 1 unowned, 1 unsourced change
- **Stale reviews**: Inventory turns (A-09, last reviewed March 2025) and line of credit interest rate (A-13, last reviewed June 2025) both need revalidation
- **No owner**: Merit increase (A-16) lacks accountability
- **Unsourced change**: Average headcount (A-04) increased from 23.0 to 23.75 FTE but needs documentation of the source; this feeds the headcount driver so it requires sourced support before the plan locks

The review and supporting data are in `/output/`:
- `register-note.md` — the review 
- `register.json` — script output with detailed findings