fix(web): checkpoint GameMaker data structures

.github/rpg-runtime/verify-release.py

@@ -66,7 +66,7 @@ def main() -> int:
         for path in paths
     ]
     metadata = {
-        "adapterAbi": "butterscotch-checkpoint-v1",
+        "adapterAbi": "butterscotch-checkpoint-v2",
         "assets": assets,
         "commit": args.commit,
         "digestPolicy": "OBSERVED_CACHE_INTEGRITY_ONLY",

.github/rpg-runtime/verify-source.py

@@ -35,7 +35,7 @@ def main() -> int:
             r"^rpg-runtime-gae2602f1f83c-r[1-9][0-9]*"
             r"(-rc\.[1-9][0-9]*)?$"
         ),
-        "adapterAbi": "butterscotch-checkpoint-v1",
+        "adapterAbi": "butterscotch-checkpoint-v2",
         "releaseAssets": [
             "butterscotch.mjs", "butterscotch.wasm",
             "butterscotch-meta.mjs", "butterscotch-meta.wasm",

AGENTS.md

@@ -37,6 +37,11 @@ databases, review workflows, credentials, and private games.
 - A stable Web release must support lifecycle ready/exit signals, pause/resume,
   standard browser gamepads, and a bounded checkpoint that restores directly
   in a fresh runtime instance without requiring the game's own load menu.
+- Checkpoint ABI `butterscotch-checkpoint-v2` includes bounded serialization of
+  GameMaker map/list/queue/stack/priority/grid pools and preserves pool IDs.
+  Do not reintroduce a blanket data-structure blocker or label a different wire
+  format as v2; buffers, motion-planning grids, structs and persistent-room
+  snapshots remain explicitly unavailable until they have exact round-trip tests.
 - A core-owned exit must be observable by the host exactly once. Once exited,
   checkpoint creation must fail and all input must be released.
 - Tests use only the repository's redistributable, non-commercial fixtures.

retrom-fork.json

@@ -13,7 +13,7 @@
     }
   ],
   "releaseTagPattern": "^rpg-runtime-gae2602f1f83c-r[1-9][0-9]*(-rc\\.[1-9][0-9]*)?$",
-  "adapterAbi": "butterscotch-checkpoint-v1",
+  "adapterAbi": "butterscotch-checkpoint-v2",
   "releaseAssets": [
     "butterscotch.mjs",
     "butterscotch.wasm",