diff --git a/docs/technical/README.md b/docs/technical/README.md
index 209e3bd5..cab7e99d 100644
--- a/docs/technical/README.md
+++ b/docs/technical/README.md
@@ -4,6 +4,7 @@
 
 ## 文档列表
 
+- [SPACETIMEDB_START_SH_EARLY_EXIT_DIAGNOSTICS_2026-04-27.md](./SPACETIMEDB_START_SH_EARLY_EXIT_DIAGNOSTICS_2026-04-27.md)：记录发布包 `start.sh` 只输出“SpacetimeDB 进程在就绪前退出”时的诊断补强，启动失败或超时时自动回显 `logs/spacetimedb.log`、`server ping`、端口监听和 root-dir 相关进程。
 - [RPG_AND_AGENT_CHAT_TRUE_SSE_STREAMING_2026-04-26.md](./RPG_AND_AGENT_CHAT_TRUE_SSE_STREAMING_2026-04-26.md)：记录 RPG 运行时 NPC 聊天、RPG/自定义世界 Agent 与大鱼 Agent 从“拼完整 SSE 字符串后一次性返回”改为 `mpsc + Sse<Event>` 真流式输出的后端落地口径。
 - [SPACETIMEDB_START_SH_ROOT_OWNER_FALSE_POSITIVE_FIX_2026-04-27.md](./SPACETIMEDB_START_SH_ROOT_OWNER_FALSE_POSITIVE_FIX_2026-04-27.md)：记录发布包 `start.sh` root-dir 占用检测把 `grep -F .../.spacetimedb` 误判为 SpacetimeDB 实例的根因、脚本修复和现场处理方式。
 - [RPG_BATTLE_HEALTHBAR_AND_ACTION_PRESENTATION_FIX_2026-04-26.md](./RPG_BATTLE_HEALTHBAR_AND_ACTION_PRESENTATION_FIX_2026-04-26.md)：记录 RPG 战斗血条安全锚点、服务端战斗回包前端短表现，以及 `battle_use_skill` 指定技能兜底结算的修复口径。
diff --git a/docs/technical/SPACETIMEDB_START_SH_EARLY_EXIT_DIAGNOSTICS_2026-04-27.md b/docs/technical/SPACETIMEDB_START_SH_EARLY_EXIT_DIAGNOSTICS_2026-04-27.md
new file mode 100644
index 00000000..5b49aa99
--- /dev/null
+++ b/docs/technical/SPACETIMEDB_START_SH_EARLY_EXIT_DIAGNOSTICS_2026-04-27.md
@@ -0,0 +1,75 @@
+# start.sh SpacetimeDB 就绪前退出诊断补强
+
+日期：`2026-04-27`
+
+## 1. 问题
+
+执行发布包内 `start.sh` 时，可能只看到：
+
+```text
+[start] 启动 spacetimedb
+[start] SpacetimeDB 进程在就绪前退出。
+```
+
+这条信息只能说明 `spacetime start` 子进程在 `server ping` 判定就绪前退出，不能直接说明根因。真实错误通常已经写入发布目录下的 `logs/spacetimedb.log`。
+
+## 2. 常见根因
+
+1. `GENARRATIVE_SPACETIME_PORT` 对应端口已被其他进程占用。
+2. `.spacetimedb/` root-dir 权限不正确，当前用户无法写入数据、bin 或日志目录。
+3. 目标机 `spacetime` 安装不完整，发布包同步不到可执行的 `bin/current/spacetimedb-cli`。
+4. 目标机上的 `spacetime` 版本与脚本启动参数不兼容。
+5. 旧 SpacetimeDB 进程仍持有同一 root-dir 或数据锁，但当前 `GENARRATIVE_SPACETIME_SERVER_URL` 指向的端口未就绪。
+6. `.spacetimedb/bin/current/` 下只有 `spacetimedb-cli`，缺少 `spacetimedb-standalone`，日志会显示 `exec failed for .../spacetimedb-standalone`。
+
+## 3. 落地修复
+
+发布包生成的 `start.sh` 调整为：
+
+1. 等待循环先执行 `server ping`，再检查启动进程是否退出，避免目标服务刚好已就绪但启动包装进程已退出时误报。
+2. `sync_ubuntu_spacetime_install` 不再只判断或复制 `spacetimedb-cli`，而是要求 `bin/current/spacetimedb-cli` 与 `bin/current/spacetimedb-standalone` 同时存在；从 Ubuntu 用户级安装目录同步时也复制完整版本目录。
+3. 当 SpacetimeDB 进程提前退出或等待超时时，自动打印：
+   - `GENARRATIVE_SPACETIME_SERVER_URL` 对应的目标地址。
+   - `GENARRATIVE_SPACETIME_HOST:GENARRATIVE_SPACETIME_PORT` 对应的监听地址。
+   - 当前 `GENARRATIVE_SPACETIME_ROOT_DIR`。
+   - `logs/spacetimedb.log` 最近 120 行。
+   - `spacetime server ping` 的原始输出。
+   - `ss` 或 `netstat` 中当前端口的监听情况。
+   - 同一 root-dir 下仍在运行的 SpacetimeDB 进程。
+
+## 4. 现场排查
+
+在发布目录中执行：
+
+```bash
+tail -n 120 logs/spacetimedb.log
+spacetime --root-dir ./.spacetimedb server ping "${GENARRATIVE_SPACETIME_SERVER_URL:-http://127.0.0.1:3101}"
+ss -ltnp | grep ':3101' || true
+```
+
+如果日志包含：
+
+```text
+exec failed for /var/lib/jenkins/deploy/Genarrative/.spacetimedb/bin/current/spacetimedb-standalone
+No such file or directory (os error 2)
+```
+
+说明发布目录的 SpacetimeDB root-dir 中同步了 CLI，但没有同步 standalone。现场可先执行：
+
+```bash
+cd /var/lib/jenkins/deploy/Genarrative
+SPACETIME_VERSION_DIR="$(find /usr/.local/share/spacetime/bin "$HOME/.local/share/spacetime/bin" -mindepth 1 -maxdepth 1 -type d 2>/dev/null | sort -V | tail -n 1)"
+test -x "${SPACETIME_VERSION_DIR}/spacetimedb-cli"
+test -x "${SPACETIME_VERSION_DIR}/spacetimedb-standalone"
+rm -rf .spacetimedb/bin/current
+mkdir -p .spacetimedb/bin/current
+cp -a "${SPACETIME_VERSION_DIR}/." .spacetimedb/bin/current/
+chmod +x .spacetimedb/bin/current/spacetimedb-cli .spacetimedb/bin/current/spacetimedb-standalone
+./start.sh
+```
+
+如果日志显示端口占用，先确认占用者是否就是旧的 SpacetimeDB。需要复用时，把 `GENARRATIVE_SPACETIME_PORT` 或 `GENARRATIVE_SPACETIME_SERVER_URL` 改成实际端口；需要重启时，优先执行同目录 `./stop.sh`。
+
+如果日志显示权限问题，先修复发布目录、`.spacetimedb/` 和 `logs/` 的所属用户，不要直接删除 `.spacetimedb/` 绕过问题。删除 `.spacetimedb/` 会同时影响本地 SpacetimeDB 数据与 CLI 身份，只能在确认本地库可丢弃时使用。
+
+如果日志显示身份或 `403 Forbidden`，继续按 `SPACETIMEDB_START_SH_PUBLISH_403_IDENTITY_FIX_2026-04-26.md` 处理；这类错误发生在发布阶段，不属于启动进程提前退出。
diff --git a/scripts/deploy-rust-remote.sh b/scripts/deploy-rust-remote.sh
index 24f6bb32..a8b8b822 100644
--- a/scripts/deploy-rust-remote.sh
+++ b/scripts/deploy-rust-remote.sh
@@ -548,19 +548,25 @@ wait_for_spacetime() {
   local deadline=$((SECONDS + SPACETIME_TIMEOUT_SECONDS))
 
   while ((SECONDS < deadline)); do
-    if [[ -n "${process_pid}" ]] && ! kill -0 "${process_pid}" 2>/dev/null; then
-      echo "[start] SpacetimeDB 进程在就绪前退出。" >&2
-      exit 1
-    fi
-
     if is_spacetime_ready; then
       return
     fi
 
+    if [[ -n "${process_pid}" ]] && ! kill -0 "${process_pid}" 2>/dev/null; then
+      echo "[start] SpacetimeDB 进程在就绪前退出。" >&2
+      print_spacetime_start_diagnostics
+      exit 1
+    fi
+
     sleep 0.5
   done
 
+  if is_spacetime_ready; then
+    return
+  fi
+
   echo "[start] 等待 SpacetimeDB 就绪超时: ${SPACETIME_SERVER_URL}" >&2
+  print_spacetime_start_diagnostics
   exit 1
 }
 
@@ -575,6 +581,42 @@ is_spacetime_ready() {
   [[ "${output}" == *"Server is online:"* ]]
 }
 
+print_spacetime_start_diagnostics() {
+  local log_file="${LOG_DIR}/spacetimedb.log"
+  local root_owner=""
+
+  # SpacetimeDB 启动日志默认重定向到文件；失败时主动回显关键现场，避免只看到“就绪前退出”。
+  echo "[start] SpacetimeDB 启动诊断:" >&2
+  echo "[start] - server: ${SPACETIME_SERVER_URL}" >&2
+  echo "[start] - listen: ${SPACETIME_HOST}:${SPACETIME_PORT}" >&2
+  echo "[start] - root-dir: ${SPACETIME_ROOT_DIR}" >&2
+  echo "[start] - log: ${log_file}" >&2
+
+  if [[ -f "${log_file}" ]]; then
+    echo "[start] ${log_file} 最近 120 行:" >&2
+    tail -n 120 "${log_file}" >&2 || true
+  else
+    echo "[start] 尚未生成 ${log_file}" >&2
+  fi
+
+  echo "[start] server ping 结果:" >&2
+  spacetime --root-dir="${SPACETIME_ROOT_DIR}" server ping "${SPACETIME_SERVER_URL}" >&2 || true
+
+  if command -v ss >/dev/null 2>&1; then
+    echo "[start] ${SPACETIME_PORT} 端口监听检查:" >&2
+    ss -ltnp 2>/dev/null | awk -v listen=":${SPACETIME_PORT}" 'NR == 1 || index($0, listen) > 0 { print }' >&2 || true
+  elif command -v netstat >/dev/null 2>&1; then
+    echo "[start] ${SPACETIME_PORT} 端口监听检查:" >&2
+    netstat -ltnp 2>/dev/null | awk -v listen=":${SPACETIME_PORT}" 'NR == 1 || index($0, listen) > 0 { print }' >&2 || true
+  fi
+
+  root_owner="$(describe_spacetime_root_owner || true)"
+  if [[ -n "${root_owner}" ]]; then
+    echo "[start] root-dir 相关 SpacetimeDB 进程:" >&2
+    echo "${root_owner}" >&2
+  fi
+}
+
 describe_spacetime_root_owner() {
   if command -v ps >/dev/null 2>&1; then
     ps -eo user=,pid=,ppid=,stat=,comm=,args= 2>/dev/null | awk -v root_dir="${SPACETIME_ROOT_DIR}" '
@@ -600,7 +642,9 @@ describe_spacetime_root_owner() {
 
 sync_ubuntu_spacetime_install() {
   local root_dir="$1"
-  local target_cli="${root_dir}/bin/current/spacetimedb-cli"
+  local target_bin_dir="${root_dir}/bin/current"
+  local target_cli="${target_bin_dir}/spacetimedb-cli"
+  local target_standalone="${target_bin_dir}/spacetimedb-standalone"
   local spacetime_command=""
   local resolved_command=""
   local install_dir=""
@@ -609,7 +653,7 @@ sync_ubuntu_spacetime_install() {
   local share_bin_dir=""
   local version_dir=""
 
-  if [[ -x "${target_cli}" ]]; then
+  if [[ -x "${target_cli}" && -x "${target_standalone}" ]]; then
     return
   fi
 
@@ -632,11 +676,12 @@ sync_ubuntu_spacetime_install() {
     "${HOME:-}/.local/share/spacetime/bin"; do
     if [[ -d "${share_bin_dir}" ]]; then
       version_dir="$(find "${share_bin_dir}" -mindepth 1 -maxdepth 1 -type d | sort -V | tail -n 1)"
-      if [[ -n "${version_dir}" && -x "${version_dir}/spacetimedb-cli" ]]; then
-        echo "[start] 同步 Ubuntu SpacetimeDB CLI: ${version_dir}/spacetimedb-cli -> ${target_cli}"
-        mkdir -p "${root_bin}/current"
-        cp -f "${version_dir}/spacetimedb-cli" "${target_cli}"
-        chmod +x "${target_cli}"
+      if [[ -n "${version_dir}" && -x "${version_dir}/spacetimedb-cli" && -x "${version_dir}/spacetimedb-standalone" ]]; then
+        echo "[start] 同步 Ubuntu SpacetimeDB 安装: ${version_dir} -> ${target_bin_dir}"
+        rm -rf "${target_bin_dir}"
+        mkdir -p "${target_bin_dir}"
+        cp -a "${version_dir}/." "${target_bin_dir}/"
+        chmod +x "${target_cli}" "${target_standalone}"
         return
       fi
     fi
@@ -648,27 +693,27 @@ sync_ubuntu_spacetime_install() {
   elif [[ -x "${install_dir}/current/spacetimedb-cli" ]]; then
     echo "[start] 同步 Ubuntu SpacetimeDB 安装: ${install_dir} -> ${root_bin}"
     cp -a "${install_dir}/." "${root_bin}/"
-  elif [[ -x "${install_dir}/spacetimedb-cli" ]]; then
-    echo "[start] 同步 Ubuntu SpacetimeDB CLI: ${install_dir}/spacetimedb-cli -> ${target_cli}"
-    mkdir -p "${root_bin}/current"
+  elif [[ -x "${install_dir}/spacetimedb-cli" && -x "${install_dir}/spacetimedb-standalone" ]]; then
+    echo "[start] 同步 Ubuntu SpacetimeDB 安装: ${install_dir} -> ${target_bin_dir}"
+    rm -rf "${target_bin_dir}"
+    mkdir -p "${target_bin_dir}"
     cp -f "${install_dir}/spacetimedb-cli" "${target_cli}"
-    chmod +x "${target_cli}"
+    cp -f "${install_dir}/spacetimedb-standalone" "${target_standalone}"
+    chmod +x "${target_cli}" "${target_standalone}"
   elif [[ -f "${resolved_command}" ]]; then
     parent_dir="$(cd -- "${install_dir}/.." && pwd)"
-    if [[ -d "${parent_dir}/bin" && -x "${parent_dir}/bin/current/spacetimedb-cli" ]]; then
+    if [[ -d "${parent_dir}/bin" && -x "${parent_dir}/bin/current/spacetimedb-cli" && -x "${parent_dir}/bin/current/spacetimedb-standalone" ]]; then
       echo "[start] 同步 Ubuntu SpacetimeDB 安装: ${parent_dir}/bin -> ${root_bin}"
       cp -a "${parent_dir}/bin/." "${root_bin}/"
     else
-      echo "[start] 同步 Ubuntu SpacetimeDB 命令: ${resolved_command} -> ${target_cli}"
-      mkdir -p "${root_bin}/current"
-      cp -f "${resolved_command}" "${target_cli}"
-      chmod +x "${target_cli}"
+      echo "[start] 未能从 spacetime 命令路径推断完整 SpacetimeDB 安装目录: ${resolved_command}" >&2
     fi
   fi
 
-  if [[ ! -x "${target_cli}" ]]; then
-    echo "[start] 同步 SpacetimeDB 安装后仍未找到 ${target_cli}。" >&2
-    echo "[start] 请确认 Ubuntu 上的 spacetime 安装目录包含 bin/current/spacetimedb-cli，或提供可执行的 spacetime 命令。" >&2
+  if [[ ! -x "${target_cli}" || ! -x "${target_standalone}" ]]; then
+    echo "[start] 同步 SpacetimeDB 安装后仍未找到完整 current 目录。" >&2
+    echo "[start] 需要同时存在: ${target_cli} 与 ${target_standalone}" >&2
+    echo "[start] 请确认 Ubuntu 上的 spacetime 安装目录包含 spacetimedb-cli 和 spacetimedb-standalone。" >&2
     exit 1
   fi
 }