diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000000..6907f030eb
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,109 @@
+#!/usr/bin/env bash
+# ═══════════════════════════════════════════════════════════════════════
+# build.sh — 统一构建契约（通用 Gradle 实现）
+#
+# 契约（所有 T0/T1 仓库一致，外部调用方式不得更改）：
+#   用法:   ./build.sh [--clean] [--out <dir>]      # 默认 out=dist
+#   退出码: 0=成功；非 0=失败（原因写 stderr）
+#   产出:   <out>/*.jar  +  <out>/build-info.json
+#           build-info.json = { repo, version, source_commit, jars:[{file,sha256}], built_at }
+#
+# 内部实现可自由改写（gradle 目标、模块过滤、重命名、多产物、外部前置任务）。
+# 可选仓库级覆盖：
+#   - build-tasks.txt  存在则其内容（一行一个任务）替代默认 `build` 任务
+#   - build-jars.txt   存在则只收集其中列出的 jar 文件名模式（每行一个 glob）
+# ═══════════════════════════════════════════════════════════════════════
+set -euo pipefail
+cd "$(dirname "$0")"
+
+OUT=dist
+CLEAN=0
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --clean) CLEAN=1 ;;
+    --out) shift; OUT="$2" ;;
+    *) echo "usage: $0 [--clean] [--out <dir>]" >&2; exit 2 ;;
+  esac
+  shift
+done
+
+if [ ! -x ./gradlew ]; then
+  echo "build.sh: 本仓库无 ./gradlew，请改写本脚本适配（或检查目录）" >&2
+  exit 1
+fi
+
+TASKS=build
+[ -f build-tasks.txt ] && TASKS="$(tr '\n' ' ' < build-tasks.txt)"
+
+if [ "$CLEAN" = 1 ]; then
+  ./gradlew clean --console=plain
+fi
+./gradlew $TASKS --console=plain
+
+rm -rf "$OUT"
+mkdir -p "$OUT"
+
+# 收集产物 jar：排除 sources/dev 件；其余（含 shadow/-all）都收
+find . -path '*/build/libs/*.jar' ! -name '*-sources.jar' ! -name '*-dev.jar' -print0 \
+  | while IFS= read -r -d '' j; do cp "$j" "$OUT/"; done
+
+# 可选过滤：build-jars.txt 每行一个 glob，只保留匹配的 jar
+if [ -f build-jars.txt ]; then
+  python3 - "$OUT" <<'PYEOF'
+import sys, glob, pathlib
+out = pathlib.Path(sys.argv[1])
+keep = [p.strip() for p in pathlib.Path("build-jars.txt").read_text().splitlines() if p.strip()]
+for j in list(out.glob("*.jar")):
+    if not any(j.match(k) for k in keep):
+        j.unlink()
+PYEOF
+fi
+
+if ! ls "$OUT"/*.jar >/dev/null 2>&1; then
+  echo "build.sh: 构建完成但未收集到任何产物 jar（检查 build 输出或 build-jars.txt 过滤）" >&2
+  exit 1
+fi
+
+python3 - "$OUT" <<'PYEOF'
+import hashlib, json, subprocess, sys, datetime, pathlib
+out = pathlib.Path(sys.argv[1])
+
+def sha256(p):
+    h = hashlib.sha256()
+    with open(p, "rb") as f:
+        for b in iter(lambda: f.read(1 << 20), b""):
+            h.update(b)
+    return h.hexdigest()
+
+def git_head():
+    r = subprocess.run(["git", "rev-parse", "HEAD"], capture_output=True, text=True)
+    return r.stdout.strip() if r.returncode == 0 else None
+
+def git_remote():
+    r = subprocess.run(["git", "remote", "get-url", "origin"], capture_output=True, text=True)
+    return r.stdout.strip() if r.returncode == 0 else None
+
+# version：gradle.properties 的 mod_version/version，否则 git describe
+version = None
+gp = pathlib.Path("gradle.properties")
+if gp.exists():
+    for line in gp.read_text().splitlines():
+        line = line.strip()
+        if line.startswith("mod_version=") or line.startswith("version="):
+            version = line.split("=", 1)[1].strip()
+            break
+if not version:
+    r = subprocess.run(["git", "describe", "--tags", "--always"], capture_output=True, text=True)
+    version = r.stdout.strip() or "unknown"
+
+jars = [{"file": j.name, "sha256": sha256(j)} for j in sorted(out.glob("*.jar"))]
+info = {
+    "repo": git_remote(),
+    "version": version,
+    "source_commit": git_head(),
+    "jars": jars,
+    "built_at": datetime.datetime.now(datetime.timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ"),
+}
+(out / "build-info.json").write_text(json.dumps(info, ensure_ascii=False, indent=2) + "\n")
+print(f"build.sh: {len(jars)} jar(s) -> {out}/  version={version} commit={info['source_commit']}")
+PYEOF
diff --git a/fabric-transfer-api-v1/src/main/java/net/fabricmc/fabric/impl/transfer/compat/FluidStorageFluidHandler.java b/fabric-transfer-api-v1/src/main/java/net/fabricmc/fabric/impl/transfer/compat/FluidStorageFluidHandler.java
index 42f1146cca..4ac9deae9b 100644
--- a/fabric-transfer-api-v1/src/main/java/net/fabricmc/fabric/impl/transfer/compat/FluidStorageFluidHandler.java
+++ b/fabric-transfer-api-v1/src/main/java/net/fabricmc/fabric/impl/transfer/compat/FluidStorageFluidHandler.java
@@ -53,7 +53,9 @@ public int getTanks() {
     @Override
     public int getTankCapacity(int tank) {
         StorageView<FluidVariant> view = slots.get(tank);
-        return view != null ? (int) view.getCapacity() : 0;
+        // Fabric Storage capacity is in droplets; convert via toForgeBucket to mB,
+        // otherwise the Forge-side capacity reads 81x too large (1 mB = 81 droplets).
+        return view != null ? ForgeCompatUtil.toForgeBucket((int) view.getCapacity()) : 0;
     }
 
     @Override