The finishing shot is spent, and the wound skins come back

"one-shot is bad - way too easy - also we're losing all the nice gore
animation sprites" and "I noticed the last kill of a game can carry to the
spawn of a new zombie of the next round".

drillOneShot is off. The second half of that note is the part worth
remembering: a 1 hp body never passes through a wound stage, so every skin in
ZWOUND — arm off, ribs out, still walking — is skipped and the roster's best
art never renders at all. Kept as a switch, never a default.

The carry-over was a real unfairness, not a curiosity. A ball keeps pace
through a kill and travels UP-COURT, which is exactly where the next batch is
born — so the shot that finished your round flew on into bodies that did not
exist when you took it, and faulted you on a round you had not been shown
yet. The shot that ends a round is spent now, and drillCaught does the same
since it also refills the court up-court. Pierce within a batch is untouched:
that is honest occlusion you could have read, this was not.

Verified with real aimed serves through a whole round: round banks, ball goes
inactive, the next batch walks on with 0 faults and a clean sequence, and the
gang carries roster HP again (brute 5, ball boy 3).

33 tests, 15 seeds clean.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

PROJECT.md

@@ -739,11 +739,21 @@ Watch: **a roller in the middle of a sequence is seven aimed serves.** Oliver as
 robustness to be kept, so it is — but if a round ever feels like grinding rather than reading, a
 drill-only HP scale is the knob, not a change to the roster.
 
-**TENTH PASS — two testing switches, and neither should be left on by drift.**
-- **`TUNE.drillOneShot` (ON)**: every body on a drill court drops to 1 hp. Asked for to make testing
-  quick, but be aware what it removes — **the roster's HP is what makes the called ORDER matter**. A
-  roller is normally seven serves, so being told to take it third means starting on it first; at one
-  hit that whole layer of planning is gone and the sequence is pure recall. Decide it on feel.
+**TENTH PASS — two switches, and the round-boundary bug.**
+- **`TUNE.drillOneShot` — tried ON for one playtest, now OFF.** *"one-shot is bad - way too easy -
+  also we're losing all the nice gore animation sprites"*. The second half is the one that is easy to
+  miss and worth remembering generally: **a 1 hp body never passes through a wound stage**, so every
+  skin in `ZWOUND` (arm off, ribs out, still walking) is skipped and the roster's best art never
+  renders at all. The HP is also what makes the called ORDER matter — a roller is seven serves, so
+  being told to take it third means starting on it first. Kept as a switch, never a default.
+- **THE ROUND-BOUNDARY CARRY-OVER, and it was a real unfairness.** *"the last kill of a game can
+  carry to the spawn of a new zombie of the next round"*. A ball keeps pace through a kill
+  (`TUNE.zPierce`) and it travels UP-COURT — which is precisely where the next batch is born. So the
+  shot that finished your round flew on into bodies that did not exist when you took it and faulted
+  you on a round you had not been shown yet. **The shot that ends a round is spent** (`ball.active =
+  false` in drillKill's completion branch, and in `drillCaught` for the same reason: that also
+  refills the court up-court). Pierce WITHIN a batch is untouched — that is honest occlusion you
+  could have read; this was not.
 - **`TUNE.drillEaterMax` 3 -> 0 (OFF)**: *"remove the fake zombies for now"*. The drill is the pure
   puzzle with no second threat at the moment. The mechanism is untouched — `spawnEater`, the wide
   entry away from the gang, the never-a-fault rule — so one number brings it back.