docs(handoff): do not cite a specific head commit

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

docs/HANDOFF.md

@@ -4,7 +4,7 @@ Written 2026-11-11 for whoever works on this repository next. It assumes you kno
 
 ## State in one paragraph
 
-The course is complete and green. It teaches functional programming by building a purely functional Snake (then Pong, then Conway's Life) in three language tracks: JavaScript (the reference), Scala 3 and F#. Modules 0–13 plus an optional Module 7b exist as text, student stubs, reference solutions, tests and shared fixtures. The work was merged into `main` as `c67d81b` (feature commit `edd57f0`), followed by one documentation commit that added this page; `main` is pushed to `origin` (`https://gitea.lucaswinther.info/lucasw89/functional-programming-snake`). The feature branch `audit-and-extensions` was merged and deleted. Nothing is in progress.
+The course is complete and green. It teaches functional programming by building a purely functional Snake (then Pong, then Conway's Life) in three language tracks: JavaScript (the reference), Scala 3 and F#. Modules 0–13 plus an optional Module 7b exist as text, student stubs, reference solutions, tests and shared fixtures. The work was merged into `main` as `c67d81b` (feature commit `edd57f0`), followed by small commits that added this page and the fixture generators (`git log` is authoritative); `main` is pushed to `origin` (`https://gitea.lucaswinther.info/lucasw89/functional-programming-snake`). The feature branch `audit-and-extensions` was merged and deleted. Nothing is in progress.
 
 **The one thing nobody has done: play the games by hand.** Every check is automated.