feat(agents): 新增 mydsh 启动器 —— DeepSeek Harness CLI 包装

- launcher _BACKENDS 加 dsh：profile 透传、zstd 会话列表（session/title 或首条用户消息）、
  --resume 透传、DSH_HOME 环境变量与 expanduser
- entrypoints/cli/completion/打包/卸载全触点 + TestDsh 用例（裸跑/版本/透传/列表/缺 bin）

tests/test_cli.py

@@ -5,6 +5,7 @@ import sqlite3
 from pathlib import Path
 from unittest.mock import MagicMock, patch
 
+import pytest
 from click.testing import CliRunner
 
 import myagents.launcher
@@ -29,7 +30,7 @@ class TestMyagentsHelp:
     """Tests for top-level myagents command."""
 
     def test_help_shows_agent_subcommands(self) -> None:
-        """--help should list claude, kimi, codex, hermes and cursor subcommands."""
+        """--help should list claude, kimi, codex, hermes, cursor and dsh."""
         runner = CliRunner()
         result = runner.invoke(cli, ["--help"])
         assert result.exit_code == 0
@@ -38,6 +39,7 @@ class TestMyagentsHelp:
         assert "codex" in result.output
         assert "hermes" in result.output
         assert "cursor" in result.output
+        assert "dsh" in result.output
         assert "update" in result.output
         assert "upgrade" in result.output
 
@@ -692,6 +694,110 @@ class TestCursorSubcommand:
             assert mock_run.call_args.kwargs.get("cwd") == str(test_dir.resolve())
 
 
+class TestDshSubcommand:
+    """Tests for ``myagents dsh``."""
+
+    def test_help_shows_options(self) -> None:
+        runner = CliRunner()
+        result = runner.invoke(cli, ["dsh", "--help"])
+        assert result.exit_code == 0
+        assert "--cwd" in result.output
+        assert "--list" in result.output
+
+    def test_runs_dsh(self) -> None:
+        runner = CliRunner()
+        with (
+            patch(
+                "myagents.launcher.shutil.which", side_effect=_backend_which("dsh")
+            ),
+            patch("myagents.launcher.subprocess.run") as mock_run,
+        ):
+            mock_run.return_value = MagicMock(returncode=0)
+            result = runner.invoke(cli, ["dsh"])
+            assert result.exit_code == 0
+            mock_run.assert_called_once()
+            # dsh is a profile launcher: no default args injected.
+            assert mock_run.call_args[0][0] == ["/usr/bin/dsh"]
+
+    def test_missing_binary_error(self) -> None:
+        runner = CliRunner()
+        with (
+            patch("myagents.launcher.shutil.which", return_value=None),
+            patch.dict("os.environ", {}, clear=False) as env,
+        ):
+            env.pop("DSH_BIN", None)
+            result = runner.invoke(cli, ["dsh"])
+            assert result.exit_code == 127
+            assert "dsh CLI not found" in result.output
+
+    def test_cwd_option_passed(self, tmp_path: Path) -> None:
+        runner = CliRunner()
+        test_dir = tmp_path / "test_cwd"
+        test_dir.mkdir()
+
+        with (
+            patch(
+                "myagents.launcher.shutil.which", side_effect=_backend_which("dsh")
+            ),
+            patch("myagents.launcher.subprocess.run") as mock_run,
+        ):
+            mock_run.return_value = MagicMock(returncode=0)
+            result = runner.invoke(cli, ["dsh", "--cwd", str(test_dir)])
+            assert result.exit_code == 0
+            assert mock_run.call_args.kwargs.get("cwd") == str(test_dir.resolve())
+
+
+class TestDshListSessions:
+    """``mydsh -l`` reads zstd-compressed dsh session logs."""
+
+    def _write_session(self, dsh_home: Path, slug: str, sid: str, cwd: str) -> Path:
+        zstd = pytest.importorskip("zstandard")
+        log = dsh_home / "sessions" / slug / sid / "session.jsonl.zstd"
+        log.parent.mkdir(parents=True, exist_ok=True)
+        lines = [
+            json.dumps(
+                {"type": "session", "version": 0, "id": sid, "cwd": cwd}
+            ),
+            json.dumps(
+                {
+                    "type": "session/title",
+                    "seq": 1,
+                    "data": {"title": "My dsh test"},
+                }
+            ),
+        ]
+        with log.open("wb") as fh:
+            with zstd.ZstdCompressor().stream_writer(fh) as w:
+                w.write(("\n".join(lines) + "\n").encode("utf-8"))
+        return log
+
+    def test_list_shows_dsh_sessions(self, tmp_path: Path, monkeypatch) -> None:
+        workspace = tmp_path / "workspace"
+        workspace.mkdir()
+        dsh_home = tmp_path / "dshhome"
+        self._write_session(dsh_home, "slug", "sess-1", str(workspace))
+        monkeypatch.setenv("DSH_HOME", str(dsh_home))
+
+        runner = CliRunner()
+        with patch(
+            "myagents.launcher.shutil.which", return_value="/usr/bin/dsh"
+        ):
+            result = runner.invoke(
+                cli, ["dsh", "-l", "--cwd", str(workspace)]
+            )
+            assert result.exit_code == 0
+            assert "sess-1" in result.output
+            assert "My dsh test" in result.output
+
+    def test_first_prompt_reads_zstd(self, tmp_path: Path) -> None:
+        from myagents.launcher import _first_prompt_dsh
+
+        workspace = tmp_path / "ws"
+        workspace.mkdir()
+        log = self._write_session(tmp_path / "home", "slug", "sid-1", str(workspace))
+        assert _first_prompt_dsh(log) == "My dsh test"
+
+
 class TestCursorPassthrough:
     """Map myagents-style resume flags to Cursor Agent CLI flags."""
 

tests/test_entrypoints.py

@@ -9,6 +9,7 @@ from myagents.entrypoints import (
     claude_cli,
     codex_cli,
     cursor_cli,
+    dsh_cli,
     hermes_cli,
     kimi_cli,
 )
@@ -204,6 +205,49 @@ class TestMycursorEntrypoint:
             assert mock_run.call_args[0][0][-2:] == ["--resume", "abc123"]
 
 
+class TestMydshEntrypoint:
+    """``mydsh`` standalone entrypoint."""
+
+    def test_runs_dsh(self) -> None:
+        runner = CliRunner()
+        with (
+            patch("myagents.launcher.shutil.which", return_value="/usr/bin/dsh"),
+            patch("myagents.launcher.subprocess.run") as mock_run,
+        ):
+            mock_run.return_value = MagicMock(returncode=0)
+            result = runner.invoke(dsh_cli, [])
+            assert result.exit_code == 0
+            # dsh is a profile launcher; no default args are injected.
+            assert mock_run.call_args[0][0] == ["/usr/bin/dsh"]
+
+    def test_version_shows_mydsh(self) -> None:
+        runner = CliRunner()
+        result = runner.invoke(dsh_cli, ["--version"])
+        assert result.exit_code == 0
+        assert "mydsh" in result.output
+
+    def test_passthrough(self, tmp_path: Path) -> None:
+        """``--resume <id>`` passes through to the native dsh CLI."""
+        runner = CliRunner()
+        with (
+            patch("myagents.launcher.shutil.which", return_value="/usr/bin/dsh"),
+            patch("myagents.launcher.subprocess.run") as mock_run,
+        ):
+            mock_run.return_value = MagicMock(returncode=0)
+            result = runner.invoke(
+                dsh_cli, ["--cwd", str(tmp_path), "--resume", "abc123"]
+            )
+            assert result.exit_code == 0
+            assert mock_run.call_args[0][0][-2:] == ["--resume", "abc123"]
+
+    def test_missing_binary_exits_127(self) -> None:
+        runner = CliRunner()
+        with patch("myagents.launcher.shutil.which", return_value=None):
+            result = runner.invoke(dsh_cli, [])
+            assert result.exit_code == 127
+            assert "dsh CLI not found" in result.output
+
+
 class TestTmuxOption:
     """``--tmux`` / ``-t`` wraps the backend in an attachable tmux session."""