diff --git a/pyproject.toml b/pyproject.toml
index 4d8205e36..33f1b19b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ dependencies = [
     "loguru>=0.6.0,<0.8",
     "prompt-toolkit==3.0.52",
     "pillow==12.1.0",
+    "pyperclip>=1.8.0",
     "pyyaml==6.0.3",
     "rich==14.2.0",
     "ripgrepy==2.2.0",
diff --git a/src/kimi_cli/soul/slash.py b/src/kimi_cli/soul/slash.py
index fbe5a4541..0aced19f9 100644
--- a/src/kimi_cli/soul/slash.py
+++ b/src/kimi_cli/soul/slash.py
@@ -89,6 +89,33 @@ async def clear(soul: KimiSoul, args: str):
     )
 
 
+@registry.command
+async def copy(soul: KimiSoul, args: str):
+    """Copy the latest assistant response to the clipboard"""
+    from kimi_cli.utils.clipboard import copy_text_to_clipboard, is_clipboard_available
+    from kimi_cli.utils.export import format_assistant_message_md
+
+    if not is_clipboard_available():
+        wire_send(TextPart(text="Clipboard is not available on this system."))
+        return
+
+    last_assistant = next(
+        (m for m in reversed(soul.context.history) if m.role == "assistant"),
+        None,
+    )
+    if last_assistant is None:
+        wire_send(TextPart(text="No assistant response to copy."))
+        return
+
+    markdown = format_assistant_message_md(last_assistant)
+    if not markdown:
+        wire_send(TextPart(text="The latest response is empty."))
+        return
+
+    copy_text_to_clipboard(markdown)
+    wire_send(TextPart(text="Copied the latest assistant response to clipboard."))
+
+
 @registry.command
 async def yolo(soul: KimiSoul, args: str):
     """Toggle YOLO mode (auto-approve all actions)"""
diff --git a/src/kimi_cli/utils/clipboard.py b/src/kimi_cli/utils/clipboard.py
index ac76363d4..7306b1523 100644
--- a/src/kimi_cli/utils/clipboard.py
+++ b/src/kimi_cli/utils/clipboard.py
@@ -38,6 +38,11 @@ def is_clipboard_available() -> bool:
         return False
 
 
+def copy_text_to_clipboard(text: str) -> None:
+    """Copy plain text to the system clipboard."""
+    pyperclip.copy(text)
+
+
 def grab_media_from_clipboard() -> ClipboardResult | None:
     """Read media from the clipboard.
 
diff --git a/src/kimi_cli/utils/export.py b/src/kimi_cli/utils/export.py
index 2db00ebbe..5023e4512 100644
--- a/src/kimi_cli/utils/export.py
+++ b/src/kimi_cli/utils/export.py
@@ -100,6 +100,30 @@ def _format_content_part_md(part: ContentPart) -> str:
             return f"[{part.type}]"
 
 
+def format_assistant_message_md(msg: Message) -> str:
+    """Format a single assistant message as markdown.
+
+    Includes text, thinking, media placeholders, and tool calls.
+    Returns an empty string for non-assistant messages.
+    """
+    if msg.role != "assistant":
+        return ""
+
+    lines: list[str] = []
+    for part in msg.content:
+        text = _format_content_part_md(part)
+        if text.strip():
+            lines.append(text)
+            lines.append("")
+
+    if msg.tool_calls:
+        for tc in msg.tool_calls:
+            lines.append(_format_tool_call_md(tc))
+            lines.append("")
+
+    return "\n".join(lines).strip()
+
+
 def _format_tool_call_md(tool_call: ToolCall) -> str:
     """Convert a ToolCall to a markdown sub-section with a readable title."""
     args_raw = tool_call.function.arguments or "{}"
diff --git a/tests/core/test_copy_slash.py b/tests/core/test_copy_slash.py
new file mode 100644
index 000000000..2b2644c1a
--- /dev/null
+++ b/tests/core/test_copy_slash.py
@@ -0,0 +1,128 @@
+"""Tests for /copy slash command."""
+
+from __future__ import annotations
+
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+from kosong.message import Message, TextPart, ThinkPart
+from kosong.tooling.empty import EmptyToolset
+
+from kimi_cli.soul.agent import Agent, Runtime
+from kimi_cli.soul.context import Context
+from kimi_cli.soul.kimisoul import KimiSoul
+from kimi_cli.soul.slash import copy
+from kimi_cli.wire.types import TextPart as WireTextPart
+
+
+def _make_soul(runtime: Runtime, tmp_path: Path) -> KimiSoul:
+    agent = Agent(
+        name="Test Agent",
+        system_prompt="Test system prompt.",
+        toolset=EmptyToolset(),
+        runtime=runtime,
+    )
+    return KimiSoul(agent, context=Context(file_backend=tmp_path / "history.jsonl"))
+
+
+async def _run_copy(soul: KimiSoul) -> None:
+    result = copy(soul, "")
+    if result is not None:
+        await result
+
+
+class TestCopySlashCommand:
+    async def test_copy_no_assistant_message(
+        self, runtime: Runtime, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        soul = _make_soul(runtime, tmp_path)
+        sent: list[WireTextPart] = []
+        monkeypatch.setattr("kimi_cli.soul.slash.wire_send", lambda msg: sent.append(msg))
+
+        await _run_copy(soul)
+
+        assert any("No assistant response to copy" in s.text for s in sent)
+
+    async def test_copy_text_only(
+        self, runtime: Runtime, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        soul = _make_soul(runtime, tmp_path)
+        await soul.context.append_message(
+            Message(role="assistant", content=[TextPart(text="Hello, world!")])
+        )
+
+        sent: list[WireTextPart] = []
+        monkeypatch.setattr("kimi_cli.soul.slash.wire_send", lambda msg: sent.append(msg))
+
+        with patch("kimi_cli.utils.clipboard.copy_text_to_clipboard") as mock_copy:
+            await _run_copy(soul)
+
+        mock_copy.assert_called_once_with("Hello, world!")
+        assert any("Copied the latest assistant response" in s.text for s in sent)
+
+    async def test_copy_with_thinking(
+        self, runtime: Runtime, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        soul = _make_soul(runtime, tmp_path)
+        await soul.context.append_message(
+            Message(
+                role="assistant",
+                content=[
+                    ThinkPart(think="I should say hello."),
+                    TextPart(text="Hello, world!"),
+                ],
+            )
+        )
+
+        sent: list[WireTextPart] = []
+        monkeypatch.setattr("kimi_cli.soul.slash.wire_send", lambda msg: sent.append(msg))
+
+        with patch("kimi_cli.utils.clipboard.copy_text_to_clipboard") as mock_copy:
+            await _run_copy(soul)
+
+        copied = mock_copy.call_args[0][0]
+        assert "I should say hello." in copied
+        assert "Hello, world!" in copied
+        assert any("Copied the latest assistant response" in s.text for s in sent)
+
+    async def test_copy_latest_assistant_only(
+        self, runtime: Runtime, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        soul = _make_soul(runtime, tmp_path)
+        await soul.context.append_message(
+            Message(role="assistant", content=[TextPart(text="First response")])
+        )
+        await soul.context.append_message(
+            Message(role="user", content=[TextPart(text="Follow up")])
+        )
+        await soul.context.append_message(
+            Message(role="assistant", content=[TextPart(text="Second response")])
+        )
+
+        sent: list[WireTextPart] = []
+        monkeypatch.setattr("kimi_cli.soul.slash.wire_send", lambda msg: sent.append(msg))
+
+        with patch("kimi_cli.utils.clipboard.copy_text_to_clipboard") as mock_copy:
+            await _run_copy(soul)
+
+        mock_copy.assert_called_once_with("Second response")
+        assert any("Copied the latest assistant response" in s.text for s in sent)
+
+    async def test_copy_clipboard_unavailable(
+        self, runtime: Runtime, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+    ) -> None:
+        soul = _make_soul(runtime, tmp_path)
+        await soul.context.append_message(
+            Message(role="assistant", content=[TextPart(text="Hello")])
+        )
+
+        sent: list[WireTextPart] = []
+        monkeypatch.setattr("kimi_cli.soul.slash.wire_send", lambda msg: sent.append(msg))
+        monkeypatch.setattr("kimi_cli.utils.clipboard.is_clipboard_available", lambda: False)
+
+        with patch("kimi_cli.utils.clipboard.copy_text_to_clipboard") as mock_copy:
+            await _run_copy(soul)
+
+        mock_copy.assert_not_called()
+        assert any("Clipboard is not available" in s.text for s in sent)
diff --git a/uv.lock b/uv.lock
index 4a8c9d74d..cb0f43f99 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1229,6 +1229,7 @@ dependencies = [
     { name = "pydantic" },
     { name = "pykaos" },
     { name = "pyobjc-framework-cocoa", marker = "sys_platform == 'darwin'" },
+    { name = "pyperclip" },
     { name = "pyyaml" },
     { name = "rich" },
     { name = "ripgrepy" },
@@ -1273,6 +1274,7 @@ requires-dist = [
     { name = "pydantic", specifier = "==2.12.5" },
     { name = "pykaos", editable = "packages/kaos" },
     { name = "pyobjc-framework-cocoa", marker = "sys_platform == 'darwin'", specifier = ">=12.1" },
+    { name = "pyperclip", specifier = ">=1.8.0" },
     { name = "pyyaml", specifier = "==6.0.3" },
     { name = "rich", specifier = "==14.2.0" },
     { name = "ripgrepy", specifier = "==2.2.0" },