Done. I've reviewed the FY2026 assumption register and written the review to `output/register-note.md`.

**Summary:** All 20 assumptions are flagged. The entire register has stale reviews—every assumption was last reviewed more than 180 days before 2026-10-03, with the most recent review on 2025-12-15 (292 days ago). One assumption (A-16, Merit increase) has no owner. One assumption (A-04, Average headcount) changed in the current version without a recorded source. Five assumptions changed values: active customers fell to 44, gross margin rose to 26.6%, headcount grew to 23.75 FTE, list price increase moved to 4.5%, and days sales outstanding moved to 47 days.

The register and note are in the output folder with full traceability to the source CSV.