diff --git a/policy/governance.md b/policy/governance.md
index b744beab..00f5ed5f 100644
--- a/policy/governance.md
+++ b/policy/governance.md
@@ -62,8 +62,8 @@ LOCAL_READY 只用于局部恢复；新任务入口始终校验严格 READY，
 一致、工作区干净且组件状态未变；收据 `root_target/immediate_target` 等于卡片范围；目标只允许快进落后，回退或分叉拒绝。
 远端跟踪目标 ref 缺失时，local 模式的 precheck 与 `resume-local` 只在当前登记任务身份、本地 R0 对象、R0 为本地 HEAD 祖先、
 工作区干净、分支/worktree、组件与范围全部核验通过时继续。缺失或过期的远端 ref 从不证明新鲜度；只要有任一目标历史可用，
-其祖先关系须一致。local precheck 刷新失败时，远端不可查询或目标 ref 缺失按上述本地核验继续；远端可查询且已有缓存目标时，
-通告提交须本地存在且为缓存目标后代才继续，回退/分叉或通告提交本地缺失无法比较均判 REMOTE_UNVERIFIED。
+其祖先关系须一致。local precheck 刷新失败时，远端不可查询按上述本地核验继续；远端可查询时，以缓存目标（无缓存时为活动任务卡
+登记的 R0）为基线，通告提交须本地存在且为基线后代才继续，目标 ref 缺失、回退/分叉或通告提交本地缺失无法比较均判 REMOTE_UNVERIFIED。
 正式 Review 与合入仍须先完成新鲜的权威同步。
 `resume-delivery` 仍要求 READY 且收据目标等于当前权威目标。LOCAL_READY 始终是 SELF 本地工作记录，
 不能用于建任务、正式交付、Review、合入、CI、GATE 或 REPLAY。
diff --git a/scripts/task.sh b/scripts/task.sh
index caade4e3..9d1f6fee 100755
--- a/scripts/task.sh
+++ b/scripts/task.sh
@@ -18,13 +18,13 @@ fetch_target() {
   git rev-parse --verify "refs/remotes/origin/${TARGET_BRANCH}^{commit}" >/dev/null \
     || { echo "[verdict] REMOTE_UNVERIFIED — target commit missing" >&2; return 6; }
 }
-target_history() { # $1=可选基线（无缓存目标时代替比较，如任务 R0）→ 输出 ok（远端不可查询/目标 ref 缺失/无缓存目标/通告提交为缓存后代）、rewound（回退或分叉）或 uncomparable（通告提交本地缺失或无法比较）
-  local cached advertised rc=0
+target_history() { # $1=可选基线（无缓存目标时代替比较，如任务 R0）→ 输出 ok（远端不可查询/通告提交为基线后代）、rewound（回退或分叉）或 uncomparable（远端可查询但目标 ref 缺失、无基线、通告提交本地缺失或无法比较）
+  local cached listing advertised rc=0
   cached=$(git rev-parse -q --verify "refs/remotes/origin/${TARGET_BRANCH}^{commit}" 2>/dev/null) || cached=${1:-}
-  [ -n "$cached" ] || { echo ok; return 0; }
-  advertised=$(git ls-remote origin "refs/heads/${TARGET_BRANCH}" 2>/dev/null \
-    | awk -v ref="refs/heads/${TARGET_BRANCH}" '$2 == ref && !seen { print $1; seen = 1 }') || { echo ok; return 0; }
-  [ -n "$advertised" ] || { echo ok; return 0; }
+  listing=$(git ls-remote origin "refs/heads/${TARGET_BRANCH}" 2>/dev/null) || { echo ok; return 0; }
+  advertised=$(printf '%s\n' "$listing" \
+    | awk -v ref="refs/heads/${TARGET_BRANCH}" '$2 == ref && !seen { print $1; seen = 1 }')
+  [ -n "$advertised" ] && [ -n "$cached" ] || { echo uncomparable; return 0; }
   git cat-file -e "${advertised}^{commit}" 2>/dev/null || { echo uncomparable; return 0; }
   git merge-base --is-ancestor "$cached" "$advertised" 2>/dev/null || rc=$?
   case "$rc" in 0) echo ok ;; 1) echo rewound ;; *) echo uncomparable ;; esac
@@ -153,12 +153,13 @@ cmd_precheck() {
   if [ "$mode" = local ]; then
     python3 "${SCRIPT_DIR}/evidence.py" --local-context --active || return 2
     if [ "$remote_fresh" -eq 0 ]; then
-      case "$(target_history)" in
+      # 无缓存目标时只以活动任务卡登记的 R0 作比较基线，不把它当作远端最新值。
+      case "$(target_history "$(card_r0 "$(branch_card "$branch")")")" in
         rewound)
-          echo "[verdict] REMOTE_UNVERIFIED — origin/${TARGET_BRANCH} rewound or diverged from the cached target; preserve local work and reconcile the target history"
+          echo "[verdict] REMOTE_UNVERIFIED — origin/${TARGET_BRANCH} rewound or diverged from the known target; preserve local work and reconcile the target history"
           return 6 ;;
         uncomparable)
-          echo "[verdict] REMOTE_UNVERIFIED — advertised origin/${TARGET_BRANCH} commit is missing locally and cannot be compared with the cached target; preserve local work and retry the refresh"
+          echo "[verdict] REMOTE_UNVERIFIED — origin/${TARGET_BRANCH} is missing or its advertised commit cannot be compared with the known target; preserve local work and retry the refresh"
           return 6 ;;
       esac
     fi
@@ -498,7 +499,7 @@ cmd_resume() {
       remote_fresh=0
       local r0 ls_rc=0
       [ -n "$card" ] || die "no registered task card for ${branch}; receipt not imported"
-      r0=$(sed -n 's/^- 权威仓：.*；R0（initial_base_sha）= \([0-9a-f]\+\)[[:space:]]*$/\1/p' "$card" | head -1)
+      r0=$(card_r0 "$card")
       [ -n "$r0" ] || die "task card has no initial baseline; receipt not imported"
       git ls-remote --exit-code --heads origin "refs/heads/${TARGET_BRANCH}" >/dev/null 2>&1 || ls_rc=$?
       if [ "$ls_rc" -eq 2 ]; then
@@ -604,6 +605,7 @@ card_status() { sed -n 's/^.*；状态：\([^；]*\).*/\1/p' "$1" | head -1; }
 # 两级分支元数据行：'- 分支类型：<kind>；initiative_id：…；root_target：…；immediate_target：…；accepting_requirements：…'。
 # 旧卡没有该行：按 standalone、root/immediate 均为目标分支、不接收新需求处理。
 card_field() { sed -n "s/^- 分支类型：.*；$2：\([^；]*\).*/\1/p" "$1" 2>/dev/null | head -1; }
+card_r0() { sed -n 's/^- 权威仓：.*；R0（initial_base_sha）= \([0-9a-f]\+\)[[:space:]]*$/\1/p' "$1" 2>/dev/null | head -1; }
 card_branch_kind() { local v; v=$(sed -n 's/^- 分支类型：\([^；]*\).*/\1/p' "$1" 2>/dev/null | head -1); printf '%s\n' "${v:-standalone}"; }
 card_initiative_id() { card_field "$1" initiative_id; }
 card_root_target() { local v; v=$(card_field "$1" root_target); printf '%s\n' "${v:-${TARGET_BRANCH}}"; }