diff --git a/skills/auto-tmux/SKILL.md b/skills/auto-tmux/SKILL.md
index cc16341..3d751d7 100644
--- a/skills/auto-tmux/SKILL.md
+++ b/skills/auto-tmux/SKILL.md
@@ -149,6 +149,7 @@ skills/auto-tmux/scripts/swarm-state.sh init --dir /tmp/ai_swarm
 skills/auto-tmux/scripts/swarm-state.sh task-add --id task-001 --text "检查 README 链接"
 skills/auto-tmux/scripts/swarm-state.sh task-next --owner <session>:<window>.<pane>
 skills/auto-tmux/scripts/swarm-state.sh lock-acquire --name README.md --owner <session>:<window>.<pane>
+skills/auto-tmux/scripts/swarm-state.sh lock-prune --older-than 3600 --dry-run
 skills/auto-tmux/scripts/swarm-state.sh task-block --id task-001 --owner <session>:<window>.<pane> --reason "等待输入"
 skills/auto-tmux/scripts/swarm-state.sh task-fail --id task-001 --owner <session>:<window>.<pane> --reason "测试失败"
 skills/auto-tmux/scripts/swarm-state.sh report --dir /tmp/ai_swarm
diff --git a/skills/auto-tmux/references/automation.md b/skills/auto-tmux/references/automation.md
index 7e4c93d..5ca4ece 100644
--- a/skills/auto-tmux/references/automation.md
+++ b/skills/auto-tmux/references/automation.md
@@ -206,6 +206,12 @@ skills/auto-tmux/scripts/swarm-state.sh task-fail --id task-001 --owner "ai-hub:
 skills/auto-tmux/scripts/swarm-state.sh lock-acquire --name README.md --owner "ai-hub:2.1"
 ```
 
+回收过期锁前先 dry-run：
+
+```bash
+skills/auto-tmux/scripts/swarm-state.sh lock-prune --older-than 3600 --dry-run
+```
+
 完成任务并生成报告：
 
 ```bash
diff --git a/skills/auto-tmux/references/swarm-state.md b/skills/auto-tmux/references/swarm-state.md
index 40986bf..94f1c8e 100644
--- a/skills/auto-tmux/references/swarm-state.md
+++ b/skills/auto-tmux/references/swarm-state.md
@@ -141,7 +141,15 @@ skills/auto-tmux/scripts/swarm-state.sh lock-release \
 skills/auto-tmux/scripts/swarm-state.sh lock-list
 ```
 
+清理过期锁前先演练：
+
+```bash
+skills/auto-tmux/scripts/swarm-state.sh lock-prune --older-than 3600 --dry-run
+skills/auto-tmux/scripts/swarm-state.sh lock-prune --older-than 3600
+```
+
 锁使用 `mkdir` 创建目录，具备基本原子性。若锁归属不匹配，默认拒绝释放；确需人工回收时才使用 `--force`。
+`lock-prune` 用于 worker 崩溃或会话中断后的过期锁回收，必须先 `--dry-run` 确认目标。
 
 ## 报告
 
diff --git a/skills/auto-tmux/scripts/README.md b/skills/auto-tmux/scripts/README.md
index 436761a..7f36a71 100644
--- a/skills/auto-tmux/scripts/README.md
+++ b/skills/auto-tmux/scripts/README.md
@@ -52,6 +52,7 @@ skills/auto-tmux/scripts/swarm-watch.sh --session ai-hub --swarm-dir /tmp/ai_swa
 skills/auto-tmux/scripts/swarm-state.sh init --dir /tmp/ai_swarm
 skills/auto-tmux/scripts/swarm-state.sh task-add --id task-001 --text "检查 README 链接"
 skills/auto-tmux/scripts/swarm-state.sh task-next --owner "$target" --dir /tmp/ai_swarm
+skills/auto-tmux/scripts/swarm-state.sh lock-prune --older-than 3600 --dry-run --dir /tmp/ai_swarm
 skills/auto-tmux/scripts/swarm-state.sh task-block --id task-001 --owner "$target" --reason "等待输入" --dir /tmp/ai_swarm
 skills/auto-tmux/scripts/swarm-state.sh task-fail --id task-001 --owner "$target" --reason "测试失败" --dir /tmp/ai_swarm
 skills/auto-tmux/scripts/swarm-state.sh report --dir /tmp/ai_swarm
diff --git a/skills/auto-tmux/scripts/auto-tmux-smoke-test.sh b/skills/auto-tmux/scripts/auto-tmux-smoke-test.sh
index fd60701..ac56ff4 100755
--- a/skills/auto-tmux/scripts/auto-tmux-smoke-test.sh
+++ b/skills/auto-tmux/scripts/auto-tmux-smoke-test.sh
@@ -57,6 +57,10 @@ test -s "$SNAPSHOT_DIR/topology.txt"
 "$SWARM_STATE" task-claim --dir "$SWARM_DIR" --id smoke-task --owner "$worker_target"
 "$SWARM_STATE" lock-acquire --dir "$SWARM_DIR" --name smoke-file --owner "$worker_target" >/tmp/auto-tmux-smoke-lock.txt
 "$SWARM_STATE" lock-release --dir "$SWARM_DIR" --name smoke-file --owner "$worker_target" >/tmp/auto-tmux-smoke-unlock.txt
+"$SWARM_STATE" lock-acquire --dir "$SWARM_DIR" --name stale-file --owner "$worker_target" >/tmp/auto-tmux-smoke-stale-lock.txt
+"$SWARM_STATE" lock-prune --dir "$SWARM_DIR" --older-than 0 --dry-run >/tmp/auto-tmux-smoke-lock-prune-dry-run.txt
+"$SWARM_STATE" lock-prune --dir "$SWARM_DIR" --older-than 0 >/tmp/auto-tmux-smoke-lock-prune.txt
+grep -q 'stale-file' /tmp/auto-tmux-smoke-lock-prune.txt
 "$SWARM_STATE" task-done --dir "$SWARM_DIR" --id smoke-task --owner "$worker_target" --result "ok"
 "$SWARM_STATE" task-add --dir "$SWARM_DIR" --id smoke-next --text "claim next task" >/tmp/auto-tmux-smoke-task-next-add.txt
 "$SWARM_STATE" task-next --dir "$SWARM_DIR" --owner "$worker_target" >/tmp/auto-tmux-smoke-task-next.txt
diff --git a/skills/auto-tmux/scripts/swarm-state.sh b/skills/auto-tmux/scripts/swarm-state.sh
index f675270..bdd72a1 100755
--- a/skills/auto-tmux/scripts/swarm-state.sh
+++ b/skills/auto-tmux/scripts/swarm-state.sh
@@ -27,6 +27,7 @@ Usage:
   swarm-state.sh lock-acquire --name NAME --owner TARGET [--dir DIR]
   swarm-state.sh lock-release --name NAME --owner TARGET [--dir DIR] [--force]
   swarm-state.sh lock-list [--dir DIR]
+  swarm-state.sh lock-prune --older-than SEC [--dir DIR] [--dry-run]
   swarm-state.sh report [--dir DIR]
 
 Environment:
@@ -343,6 +344,40 @@ cmd_lock_list() {
   done
 }
 
+cmd_lock_prune() {
+  local older_than="" dry_run="0"
+  while [[ $# -gt 0 ]]; do
+    case "$1" in
+      --dir) set_dir "${2:-}"; shift 2 ;;
+      --older-than) older_than="${2:-}"; shift 2 ;;
+      --dry-run) dry_run="1"; shift ;;
+      *) die "unknown lock-prune option: $1" ;;
+    esac
+  done
+  [[ -n "$older_than" ]] || die "missing --older-than SEC"
+  [[ "$older_than" =~ ^[0-9]+$ ]] || die "--older-than must be seconds"
+  ensure_init
+
+  local now path created_at created_epoch age name
+  now="$(date +%s)"
+  find "$LOCKS_DIR" -mindepth 1 -maxdepth 1 -type d -name '*.lock.d' -print | sort | while read -r path; do
+    created_at="$(cat "$path/created_at" 2>/dev/null || true)"
+    created_epoch="$(date -d "$created_at" +%s 2>/dev/null || printf '0')"
+    [[ "$created_epoch" != "0" ]] || continue
+    age=$((now - created_epoch))
+    name="$(basename "$path" .lock.d)"
+    if (( age >= older_than )); then
+      if [[ "$dry_run" == "1" ]]; then
+        printf '[dry-run] would prune lock: %s age=%ss\n' "$name" "$age"
+      else
+        rm -rf "$path"
+        cmd_log --target "swarm-state" --status "UNLOCK" --message "pruned stale lock $name age=${age}s"
+        printf 'lock pruned: %s age=%ss\n' "$name" "$age"
+      fi
+    fi
+  done
+}
+
 cmd_report() {
   while [[ $# -gt 0 ]]; do
     case "$1" in
@@ -379,6 +414,7 @@ main() {
     lock-acquire) cmd_lock_acquire "$@" ;;
     lock-release) cmd_lock_release "$@" ;;
     lock-list) cmd_lock_list "$@" ;;
+    lock-prune) cmd_lock_prune "$@" ;;
     report) cmd_report "$@" ;;
     *) die "unknown command: $cmd" ;;
   esac