diff --git a/frontends/export_cmd.py b/frontends/export_cmd.py
new file mode 100644
index 00000000..4d030c50
--- /dev/null
+++ b/frontends/export_cmd.py
@@ -0,0 +1,78 @@
+"""`/export` command: export last assistant reply / locate full conversation log.
+Pure functions, no Qt deps. UI wiring lives in the frontend file.
+"""
+import os
+import re
+import sys
+from datetime import datetime
+
+from continue_cmd import _pairs, _assistant_text
+
+_TEMP_DIR = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'temp')
+_BACKTICK_RUN_RE = re.compile(r'`+')
+
+
+def wrap_for_clipboard(text, language='markdown'):
+    """Wrap text in a markdown code fence that survives nested fences.
+
+    CommonMark closes a fenced block on a line whose backtick run is at least
+    as long as the opening one. Pick `max(3, longest_inner_run + 1)` so any
+    backticks inside `text` are strictly shorter than the outer fence.
+    """
+    longest = max((len(m.group(0)) for m in _BACKTICK_RUN_RE.finditer(text)), default=0)
+    fence = '`' * max(3, longest + 1)
+    return f"{fence}{language}\n{text}\n{fence}"
+
+
+def last_assistant_text(agent):
+    """Last assistant reply as joined plain text from `agent.log_path`.
+
+    Reads the model_responses log, takes the most recent === Response === block,
+    and joins only the `text` fields (skips thinking/tool_use/tool_result).
+
+    Returns None when:
+      - the LLM backend's history is empty (fresh agent or just-`/new`'d —
+        log_path may still hold prior-session content that no longer belongs
+        to the current conversation)
+      - the log is missing or unreadable
+      - there's no Response yet, or the last Response holds no text blocks
+        (e.g. tool-only turn)
+
+    OS errors are logged to stderr — small failure radius, the UI falls back
+    gracefully.
+    """
+    if not (agent.llmclient and agent.llmclient.backend.history):
+        return None
+    log = agent.log_path
+    if not os.path.isfile(log):
+        return None
+    try:
+        with open(log, encoding='utf-8', errors='replace') as f:
+            content = f.read()
+    except OSError as e:
+        print(f"[export_cmd] failed to read {log}: {e}", file=sys.stderr)
+        return None
+    pairs = _pairs(content)
+    if not pairs:
+        return None
+    text = _assistant_text(pairs[-1][1])
+    return text if text.strip() else None
+
+
+def export_to_temp(text, name):
+    """Write text to temp/<name>.md, overwriting on collision. Returns full path.
+
+    `name` is sanitized via os.path.basename to keep the write inside temp/.
+    Empty/whitespace name falls back to a timestamp. `.md` is appended if
+    the user-supplied name has no extension.
+    """
+    os.makedirs(_TEMP_DIR, exist_ok=True)
+    safe = os.path.basename((name or '').strip())
+    if not safe:
+        safe = f"export_{datetime.now().strftime('%Y%m%d_%H%M%S')}"
+    if not os.path.splitext(safe)[1]:
+        safe = safe + '.md'
+    path = os.path.join(_TEMP_DIR, safe)
+    with open(path, 'w', encoding='utf-8') as f:
+        f.write(text)
+    return path
diff --git a/frontends/stapp.py b/frontends/stapp.py
index 85987222..83a6d33c 100644
--- a/frontends/stapp.py
+++ b/frontends/stapp.py
@@ -17,6 +17,7 @@ from agentmain import GeneraticAgent
 import chatapp_common  # activate /continue command (monkey patches GeneraticAgent)
 from continue_cmd import handle_frontend_command, reset_conversation, list_sessions, extract_ui_messages
 from btw_cmd import handle_frontend_command as btw_handle_frontend
+from export_cmd import last_assistant_text, export_to_temp, wrap_for_clipboard
 
 st.set_page_config(page_title="Cowork", layout="wide")
 
@@ -293,6 +294,38 @@ if prompt := st.chat_input("any task?"):
             {"role": "assistant", "content": answer, "time": ts},
         ]
         st.rerun()  # preserve display_queue/partial_response so resume path drains the running main task
+    if cmd.startswith("/export"):
+        parts = cmd.split(maxsplit=1)
+        sub = parts[1].strip() if len(parts) > 1 else ""
+        sub_lower = sub.lower()
+        if not sub:
+            result = (
+                "**选择导出方式：**\n\n"
+                "- `/export clip` — 整理到代码块中\n"
+                "- `/export <文件名>` — 导出到 `temp/<文件名>`（默认 .md 后缀）\n"
+                "- `/export all` — 显示完整对话日志路径"
+            )
+        elif sub_lower == "all":
+            log = agent.log_path
+            result = (f"📂 完整对话日志:\n\n`{log}`" if os.path.isfile(log)
+                      else f"❌ 当前会话尚无日志文件")
+        else:
+            text = last_assistant_text(agent)
+            if not text:
+                result = "❌ 还没有模型回复可导出"
+            elif sub_lower in ("clip", "copy"):
+                result = f"📋 最后一轮回复（点代码块右上角 📋 复制）:\n\n{wrap_for_clipboard(text)}"
+            else:
+                try:
+                    path = export_to_temp(text, sub)
+                    result = f"✅ 已导出:\n\n`{path}`"
+                except Exception as e:
+                    result = f"❌ 导出失败: {e}"
+        st.session_state.messages = list(st.session_state.messages) + [
+            {"role": "user", "content": cmd, "time": ts},
+            {"role": "assistant", "content": result, "time": ts},
+        ]
+        _reset_and_rerun()
     # Regular prompt: any in-flight task will be aborted by the finally block in
     # agent_backend_stream when StopException interrupts the prior generator.
     st.session_state.messages.append({"role": "user", "content": prompt})