save path of the relocated coin and flag arrays verified in game: saves after finishing jungle 2 and village 1 byte-identical to the old exe, testlevel coins never reach the save

docs/reference/testlevel.md

@@ -28,6 +28,8 @@ first free chapter from 32, and old projects on other chapters are moved automat
 LlamaMod additionally relocates both arrays to a 128-entry buffer in unused space of `groove.exe`
 (base exe patch, revision 2), so even picking an empty chapter on the world map is harmless with
 LlamaMod's executable. Mods still keep to 1 and 32–49 so they also work with an unpatched exe.
+Save games are unaffected: a save after finishing a normal or TestLevel chapter is byte-identical
+with and without the relocation, and only the 54 entries of worlds 0–8 are saved.
 
 ## Making world 9 reachable
 

notes/testlevel-chapters.md

@@ -109,8 +109,38 @@ Verified in game (apptest :24, 2026-11-07):
 * Arena (test mod) on chapter 9, 2 coins collected (HUD 2 / 12), quit to the map → map fine.
 * Save with world-1 chapter 1 flags = 3 and gold count 2: slot menu "Goldmünzen 2", the map shows
   the collectible and gold icons of Village chapter 1 (KSV load loop + map reads relocated).
-* Not verified in game: the KSV save loop after finishing a level (same patch shape as the load
-  loop, covered by the unit test).
+* **KSV save loop after finishing a normal level, A/B byte comparison** (apptest :25, sessions
+  `savetest-a` = fat jar of the commit before 00b2880, base REVISION 1; `savetest-b` = HEAD,
+  REVISION 2; 2026-11-07). Slot 3 (`king2.ksv`) preloaded identically in both with a distinct
+  pattern for worlds 1–8, chapters 1–5: flags `(w + c) % 4`, coins `((5w + c) % 15 + 1) << 12`
+  (gold count 19/20 to match), so a save loop reading the old arrays in B would write zeros.
+  Mods: boot-to-level (slot 3) + cheats `rewards` (flags |= 3 at the chapter end). Runs:
+  1. **Jungle night 2** (world 2 ch. 2, exit pad reachable directly): start `29.45, 3.5, 60.3, 180
+     @ 2/2`, Up ~5.5 s → 3 coins → tally "Münzen gesammelt 3 / 70" → Return.
+  2. **Village 1** (world 1 ch. 1): t1l1m001 rebuilt by a throw-away tool (WadImporter → tile 420
+     set to its swap-alt model 49 with the exit pad, RubyIdolDoor removed, the two coins near the
+     door moved to x 42.5, `StartOverride` 42.5/3.5/51.8 yaw 180 → WadBuilder), written over the
+     session's `cd-active/wads/t1l1m001.wad` after apply; Up 3.5 s → tally "Dorf Kapitel 1,
+     Münzen gesammelt 2 / 55" → Return. (Village 4's direct exit is behind the Yzma boss fight.)
+  3. **TestLevel chapter 1** (Test World, start `44.3, 3.6, 15.5, 90 @ 9/1`, 3 coins, rewards
+     cheat) on top of the Village-1 save → tally → Return.
+
+  All three saved KSVs are **byte-identical in A and B** (`cmp`: 0 differences). Run 1: chapter
+  (2,2) coins 9 → 3, flags 0 → 3, gold 20 → 21, progress (2,2) → (2,3), cursor (2,3), last played
+  (2,2); every other preloaded coin/flag entry and bytes 0xB0–0xFF unchanged. Run 2: (1,1) coins
+  → 2, flags → 3, gold 19 → 20, progress (1,2). Run 3 (world-9 leak check): only cursor world/chapter
+  (9,1) and last-played world 9 change; all 54 coin/flag entries, gold, progress and 0xB0–0xFF stay
+  as before – the world-9 coins/flags (buffer index 55) are not written (54 entries only). B's save
+  loaded again without mods: slot menu "Gespeichertes Spiel 3 / Dorf Kapitel 2 / Goldmünzen 20",
+  world map on Village 2 with the collectible and gold icons (preloaded flags 3).
+  ![tallies, slot menu, map (B)](img/mods/testlevel_save_ab.jpg)
+* **TestLevel tally** (question from the coaster test): Return does save (KSV rewritten, see run 3)
+  – there is never a visible "saved" step, also not in normal levels (the next level loads at
+  once). The Test World / coaster / arena exits lead back to the same chapter, so the restart zeroes
+  that chapter's coin counter (level start, FUN_0041cba0) → the map then shows 0; world-9 coins are
+  never in the KSV anyway. Expected and harmless. Esc on the tally asks "Möchtest du das Spiel
+  beenden? Ja / Nein" (Return = Nein, back to the tally) – identical with the old exe (A), so not
+  caused by the relocation. ![Esc on the tally](img/mods/testlevel_tally_esc.jpg)
 
 ## Before the fix