Cobblemon Survival Pack: phases 0-2 and Phase 3 zones and hazards

Free NeoForge 1.21.1 modpack on Cobblemon 1.8.4 built with packwiz, plus
the Kotlin companion mod (cobblesurvival) and its built-in data pack.

- Phase 0: packwiz pack with Modrinth/CurseForge cross-links, build and
  export tooling, Prism instance sync, test server with smoke checks.
- Phase 1: Poke Ball shaped island (WorldGen Editor preset, seed isle-26),
  Adrian's biome list, no natural ore, structures without ore or vanilla
  mobs, no Nether portals, world template builder and world report.
- Phase 2: permadeath (CobbleHardcoreMon plus the companion mod's gap
  fixes), Revival Charm, expensive Healing Machine, Lootr refreshing
  loot, in-game self-tests on Minecraft's GameTest framework.
- Phase 3 so far: 14 zones with their own spawn pools and level bands
  (tools/zone_layout.py, tools/zone_spawns.py, "zone" spawn condition),
  Cold Sweat heat and cold as gates with boss-drop insulation recipes,
  spawn survey and hazard self-tests in tools/quick_check.py.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/packwiz_sync.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+"""Install or update a packwiz pack into a folder with packwiz-installer.
+
+packwiz-installer wants a URL, so the pack folder is served on 127.0.0.1 for
+the duration of the sync. It downloads Modrinth and CurseForge files from
+their own CDNs and removes files that left the pack since the last sync.
+
+Usage: tools/packwiz_sync.py <client|server> <target_dir> [pack_dir]
+       (pack_dir defaults to build/stage/full)
+"""
+import functools
+import http.server
+import shutil
+import subprocess
+import sys
+import threading
+import urllib.request
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parent.parent
+CACHE = ROOT / "build" / ".cache"
+# Pinned; the bootstrap runs with --bootstrap-no-update so neither self-updates.
+TOOLS = {
+    "packwiz-installer-0.5.14.jar":
+        "https://github.com/packwiz/packwiz-installer/releases/download/v0.5.14/packwiz-installer.jar",
+    "packwiz-installer-bootstrap-0.0.3.jar":
+        "https://github.com/packwiz/packwiz-installer-bootstrap/releases/download/v0.0.3/packwiz-installer-bootstrap.jar",
+}
+
+
+def cached(name):
+    jar = CACHE / name
+    if not jar.exists():
+        CACHE.mkdir(parents=True, exist_ok=True)
+        with urllib.request.urlopen(TOOLS[name], timeout=120) as r, open(jar, "wb") as f:
+            shutil.copyfileobj(r, f)
+    return jar
+
+
+def java():
+    for candidate in (Path.home() / ".var/app/org.prismlauncher.PrismLauncher/data/PrismLauncher/java/java-runtime-delta/bin/java",):
+        if candidate.exists():
+            return str(candidate)
+    return shutil.which("java")
+
+
+class QuietHandler(http.server.SimpleHTTPRequestHandler):
+    def log_message(self, *args):
+        pass
+
+
+def sync(side, target, pack_dir):
+    target.mkdir(parents=True, exist_ok=True)
+    handler = functools.partial(QuietHandler, directory=str(pack_dir))
+    server = http.server.ThreadingHTTPServer(("127.0.0.1", 0), handler)
+    threading.Thread(target=server.serve_forever, daemon=True).start()
+    try:
+        url = f"http://127.0.0.1:{server.server_port}/pack.toml"
+        subprocess.run([java(), "-jar", str(cached("packwiz-installer-bootstrap-0.0.3.jar")),
+                        "--bootstrap-no-update",
+                        "--bootstrap-main-jar", str(cached("packwiz-installer-0.5.14.jar")),
+                        "-g", "-s", side, url],
+                       cwd=target, check=True)
+    finally:
+        server.shutdown()
+
+
+def main():
+    if len(sys.argv) < 3 or sys.argv[1] not in ("client", "server"):
+        sys.exit(__doc__)
+    pack_dir = Path(sys.argv[3]) if len(sys.argv) > 3 else ROOT / "build" / "stage" / "full"
+    sync(sys.argv[1], Path(sys.argv[2]).resolve(), pack_dir.resolve())
+
+
+if __name__ == "__main__":
+    main()