From eee778660907b4c43332e2c2be931369bc61bd08 Mon Sep 17 00:00:00 2001
From: Ludovic Marie <136255825+ludovic111@users.noreply.github.com>
Date: Thu, 15 Oct 2026 17:53:28 +0200
Subject: [PATCH] Generated version facts through lab.version_info; options and
 world harnesses take the data version from the jar

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 tests/test_gen_version_consts.py |  2 +-
 tools/gen_version_consts.py      | 10 ++--------
 tools/test_options_parity.py     |  2 +-
 tools/test_world_parity.py       |  2 +-
 4 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/tests/test_gen_version_consts.py b/tests/test_gen_version_consts.py
index 61b12e62f6..36daee8490 100644
--- a/tests/test_gen_version_consts.py
+++ b/tests/test_gen_version_consts.py
@@ -33,7 +33,7 @@ class GenVersionConstsTests(unittest.TestCase):
             jar = Path(directory) / "client.jar"
             with zipfile.ZipFile(jar, "w") as archive:
                 archive.writestr("version.json", json.dumps(INFO))
-            self.assertEqual(gen.jar_info(jar), INFO)
+            self.assertEqual(lab.version_info(jar), INFO)
 
     def test_committed_file_is_the_pinned_version(self):
         """A pin bump regenerates version.rs: the lock and the constants never disagree."""
diff --git a/tools/gen_version_consts.py b/tools/gen_version_consts.py
index 07cecd747e..41e0b1192e 100644
--- a/tools/gen_version_consts.py
+++ b/tools/gen_version_consts.py
@@ -15,7 +15,6 @@ from datetime import datetime, timezone
 import json
 from pathlib import Path
 import sys
-import zipfile
 
 try:
     from . import lab
@@ -25,11 +24,6 @@ except ImportError:
 OUT = lab.ROOT / "crates/horizon-core/src/version.rs"
 
 
-def jar_info(client_jar):
-    with zipfile.ZipFile(client_jar) as archive:
-        return json.loads(archive.read("version.json"))
-
-
 def java_date(iso):
     """`Date.toString()` of an ISO-8601 instant, in UTC (Locale.ROOT names)."""
     return datetime.fromisoformat(iso).astimezone(timezone.utc).strftime("%a %b %d %H:%M:%S UTC %Y")
@@ -69,8 +63,8 @@ def main():
     parser.add_argument("--out", type=Path, default=OUT)
     parser.add_argument("--check", action="store_true", help="exit 1 if --out differs instead of writing it")
     args = parser.parse_args()
-    jar = args.jar or lab.config()[1] / "jars" / "client.jar"
-    text = render(jar_info(jar))
+    jar = args.jar or lab.GAME / "jars" / "client.jar"
+    text = render(lab.version_info(jar))
     if args.check:
         if not args.out.exists() or args.out.read_text() != text:
             print(f"{args.out} does not match {jar}; run tools/gen_version_consts.py", file=sys.stderr)
diff --git a/tools/test_options_parity.py b/tools/test_options_parity.py
index cf7698e5ce..e99f67a44c 100644
--- a/tools/test_options_parity.py
+++ b/tools/test_options_parity.py
@@ -13,7 +13,7 @@ try:
 except ImportError:
     import lab, oracle_harness as harness
 
-VERSION = 5023
+VERSION = lab.version_info()['world_version']
 
 # Raw JSON-ish value texts: valid, boundary, wrong-typed, lenient-parser and
 # syntax-error forms. Syntax errors abort the rest of a load, as in vanilla.
diff --git a/tools/test_world_parity.py b/tools/test_world_parity.py
index 9f4bb5d529..802dc38849 100644
--- a/tools/test_world_parity.py
+++ b/tools/test_world_parity.py
@@ -96,7 +96,7 @@ def main():
         references.append({"side": side, "jar_sha256": lab.digest(jars[side], "sha256"), **results[0]})
         print(json.dumps(references[-1]), flush=True)
     test_rust_parity.ensure_sources_unchanged(sources, tested_sources)
-    report = {"schema": 1, "minecraft": lock["minecraft"]["version"], "data_version": 5023,
+    report = {"schema": 1, "minecraft": lock["minecraft"]["version"], "data_version": lab.version_info()["world_version"],
               "platform": platform.platform(), "java": run(["java", "--version"]).splitlines()[0],
               "rustc": run(["rustc", "--version"]).strip(), "references": references,
               "sources_sha256": tested_sources,