Start fresh Voyager checkpoints for flat world

gemini_bot_stack.py

@@ -18,7 +18,7 @@ ROOT = Path(os.environ.get("GEMINI_BOT_RUNTIME_HOME", "/tmp/gemini-bot-runtime")
 PERSIST_ROOT = Path(os.environ.get("MINECRAFT_PERSIST_HOME", "/persist/minecraft-friends"))
 CKPT_DIR = Path(os.environ.get(
     "GEMINI_VOYAGER_CKPT",
-    str(PERSIST_ROOT / "gemini-voyager" / "ckpt-20260927-surface-v1"),
+    str(PERSIST_ROOT / "gemini-voyager" / "ckpt-20260927-flat-v1"),
 ))
 LOG_PATH = ROOT / "voyager.log"
 PROXY_LOG_PATH = ROOT / "proxy.log"

voyager_stack.py

@@ -15,7 +15,7 @@ from typing import Any
 
 ROOT = Path(os.environ.get("VOYAGER_RUNTIME_HOME", "/tmp/voyager-runtime"))
 PERSIST_ROOT = Path(os.environ.get("MINECRAFT_PERSIST_HOME", "/persist/minecraft-friends"))
-CKPT_DIR = Path(os.environ.get("VOYAGER_PERSIST_CKPT", str(PERSIST_ROOT / "voyager" / "ckpt-20260927-surface-v2")))
+CKPT_DIR = Path(os.environ.get("VOYAGER_PERSIST_CKPT", str(PERSIST_ROOT / "voyager" / "ckpt-20260927-flat-v1")))
 BOT_USERNAME = os.environ.get("MC_USERNAME", "Naldo_Bot")
 BOT_DISPLAY_NAME = os.environ.get("BOT_DISPLAY_NAME", "Naldo Bot")
 SRC = ROOT / "Voyager"