diff --git a/scripts/task.sh b/scripts/task.sh
index 980be792..ada32dda 100755
--- a/scripts/task.sh
+++ b/scripts/task.sh
@@ -12,26 +12,28 @@ width() { python3 -c 'import sys,unicodedata;print(sum(2 if unicodedata.east_asi
 cmd_precheck() {
   need_repo
   git fetch -q origin "${TARGET_BRANCH}" 2>/dev/null || true
-  local branch head rmain dirty sub_dirty
+  local branch head rmain dirty sub_drift sub_uninit
   branch=$(git rev-parse --abbrev-ref HEAD)
   head=$(git rev-parse HEAD)
   rmain=$(git rev-parse --verify -q "origin/${TARGET_BRANCH}" 2>/dev/null || echo "$head")
   dirty=$(git status --porcelain | { grep -v '^.. \.zcode/' || true; } | wc -l)
-  sub_dirty=$(git submodule status --recursive 2>/dev/null | { grep -cE '^-|^\+|^U' || true; })
+  sub_drift=$(git submodule status --recursive 2>/dev/null | { grep -cE '^\+|^U' || true; })
+  sub_uninit=$(git submodule status --recursive 2>/dev/null | { grep -cE '^-' || true; })
   local behind ahead
   behind=$(git rev-list --count "HEAD..origin/${TARGET_BRANCH}" 2>/dev/null || echo 0)
   ahead=$(git rev-list --count "origin/${TARGET_BRANCH}..HEAD" 2>/dev/null || echo 0)
   echo "[repo]   branch=${branch} head=$(echo "$head" | cut -c1-10)"
   echo "[remote] origin/${TARGET_BRANCH}=$(echo "$rmain" | cut -c1-10) ahead=${ahead} behind=${behind}"
-  echo "[tree]   $([ "$dirty" -eq 0 ] && echo clean || echo "dirty(${dirty})") submodules_dirty=${sub_dirty}"
+  echo "[tree]   $([ "$dirty" -eq 0 ] && echo clean || echo "dirty(${dirty})") submodules_drift=${sub_drift} uninit=${sub_uninit}"
   local wt merged
   wt=$(git worktree list | tail -n +2 | wc -l)
   merged=$(git branch --merged "origin/${TARGET_BRANCH}" 2>/dev/null | { grep -vE 'main|master|\*' || true; } | tr -d ' +')
+  [ "${sub_uninit:-0}" -gt 0 ] && echo "[warn] ${sub_uninit} 个子模块未初始化——构建/测试前需物化（不阻断写入）"
   echo "[worktrees] linked=${wt}"
   [ -n "$merged" ] && echo "[recycle] merged un-recycled branches: $(echo $merged)"
   echo "[required-reading] core/baseline.md, workflows/delivery.md §1$([ "$dirty" -gt 0 ] && echo ", standards/collaboration.md（树脏=他人或未收尾现场，不得写入）")"
   echo "[R0] $(echo "$rmain" | cut -c1-10)（完整：$rmain）"
-  if [ "$dirty" -gt 0 ] || [ "$sub_dirty" -gt 0 ]; then
+  if [ "$dirty" -gt 0 ] || [ "${sub_drift:-0}" -gt 0 ]; then
     echo "[verdict] SHARED_WORKSPACE_BUSY — 工作树不干净，不得写入；先收尾或经 owner 确认"
     exit 3
   fi
@@ -47,7 +49,8 @@ cmd_start() {
   local name="${1:-}"; [ -n "$name" ] || die "usage: task.sh start <feature|fix|hotfix>/<slug>"
   echo "$name" | grep -qE '^(feature|fix|hotfix|release)/[A-Za-z0-9._-]+$' || die "branch name must match (feature|fix|hotfix|release)/<slug>"
   git fetch -q origin "${TARGET_BRANCH}" 2>/dev/null || true
-  [ "$(git status --porcelain | grep -v '^.. \.zcode/' | wc -l)" -eq 0 ] || die "dirty tree — resolve first (precheck verdict BUSY)"
+  [ "$(git status --porcelain | { grep -v '^.. \.zcode/' || true; } | wc -l)" -eq 0 ] || die "dirty tree — resolve first (precheck verdict BUSY)"
+  [ "$(git submodule status --recursive 2>/dev/null | { grep -cE '^\+|^U' || true; })" -eq 0 ] || die "submodule drift/conflict — resolve first (precheck verdict BUSY)"
   git merge-base --is-ancestor "origin/${TARGET_BRANCH}" HEAD || die "local ${TARGET_BRANCH} behind origin — pull --ff-only first"
   local rmain slug wt
   rmain=$(git rev-parse "origin/${TARGET_BRANCH}")