feat(mycodex): 对齐 resume options，支持 -r/--resume/--continue/--last/--all

- 新增 _translate_codex_extra，将 -r/--resume 映射为 codex resume

- --continue 映射为 codex continue，--last/--all 映射为 resume --last/--all

- 更新 help 文案与 README 用法示例

- 补充 5 个 codex resume option 单元测试，50 tests passed

README.md

@@ -82,7 +82,8 @@ myagents claude -r <session-id>   # 恢复指定 session
 myagents kimi                     # 启动 Kimi Code CLI
 myagents kimi -S <session-id>     # 恢复 Kimi session
 myagents codex                    # 启动 OpenAI Codex CLI
-myagents codex resume <id>        # 恢复 Codex session
+myagents codex -r <session-id>    # 恢复 Codex session（映射为 resume）
+myagents codex resume <id>        # 原生 resume 子命令
 myagents update                   # 重装 myagents 并同步 workspace 链接
 myagents upgrade                  # update 别名
 myagents completion               # 安装/查看/卸载 shell 补全
@@ -93,10 +94,11 @@ myclaude --cwd . -r <session-id>
 mykimi
 mykimi -S <session-id>
 mycodex
+mycodex -r <session-id>
 mycodex resume <session-id>
 ```
 
-各后端原生参数会原样透传。例如 Kimi npm 版支持 `--session`、`-c`（continue）、`-y`（yolo）等，Codex 支持 `resume`、`continue`、`exec` 等子命令，直接加在命令后即可。
+各后端原生参数会原样透传。例如 Kimi npm 版支持 `--session`、`-c`（continue）、`-y`（yolo）等，Codex 支持 `resume`、`continue`、`exec` 等子命令；`mycodex` 还会将 `-r` / `--resume` 映射为 `codex resume`，与 `myclaude` 体验保持一致。
 
 ## 配置
 

myagents/launcher.py

@@ -67,6 +67,29 @@ def _resolve_chat_cwd(cwd: str | None) -> Path:
     return chat_cwd
 
 
+def _translate_codex_extra(extra: list[str]) -> list[str]:
+    """Map myagents-style resume options to native codex subcommands.
+
+    Codex CLI uses ``resume`` / ``continue`` subcommands rather than flags.
+    This keeps ``mycodex`` UX consistent with ``myclaude`` / ``mykimi``.
+    """
+    if not extra:
+        return extra
+    head = extra[0]
+    tail = extra[1:]
+    if head in ("-r", "--resume"):
+        if not tail:
+            return ["resume"]
+        return ["resume", tail[0], *tail[1:]]
+    if head == "--continue":
+        return ["continue", *tail]
+    if head == "--last":
+        return ["resume", "--last", *tail]
+    if head == "--all":
+        return ["resume", "--all", *tail]
+    return extra
+
+
 def _launch(backend: str, chat_cwd: Path, extra: list[str]) -> None:
     """Run backend CLI in chat_cwd, forwarding extra args. Never returns."""
     config = _BACKENDS[backend]
@@ -75,6 +98,9 @@ def _launch(backend: str, chat_cwd: Path, extra: list[str]) -> None:
         stderr_console.print(config["not_found_msg"])
         raise SystemExit(127)
 
+    if backend == "codex":
+        extra = _translate_codex_extra(extra)
+
     cmd = [binary, *config["default_args"], *extra]
     proc = subprocess.run(cmd, cwd=str(chat_cwd), check=False)
     raise SystemExit(proc.returncode)
@@ -239,11 +265,11 @@ def _first_prompt(backend: str, session_file: Path) -> str:
 
 
 def _resume_syntax(backend: str) -> str:
-    """Return the backend's resume flag syntax for use in help text."""
+    """Return the backend's resume syntax for use in help text."""
     if backend == "kimi":
         return "--session, -S <id>"
     if backend == "codex":
-        return "resume <id>"
+        return "-r, --resume <id> or resume <id>"
     return "--resume, -r <id>"
 
 

tests/test_cli.py

@@ -301,6 +301,44 @@ class TestCodexPassthrough:
         assert cmd == ["/usr/bin/codex", "continue"]
 
 
+class TestCodexResumeOptions:
+    """Map myagents-style resume flags to codex resume subcommand."""
+
+    def _invoke(self, args: list[str], tmp_path: Path) -> list[str]:
+        runner = CliRunner()
+        with (
+            patch("myagents.launcher.shutil.which", return_value="/usr/bin/codex"),
+            patch("myagents.launcher.subprocess.run") as mock_run,
+        ):
+            mock_run.return_value = MagicMock(returncode=0)
+            result = runner.invoke(
+                cli, ["codex", "--cwd", str(tmp_path), *args]
+            )
+            assert result.exit_code == 0, result.output
+            mock_run.assert_called_once()
+            return mock_run.call_args[0][0]
+
+    def test_r_flag_maps_to_resume(self, tmp_path: Path) -> None:
+        cmd = self._invoke(["-r", "abc123"], tmp_path)
+        assert cmd == ["/usr/bin/codex", "resume", "abc123"]
+
+    def test_resume_flag_maps_to_resume(self, tmp_path: Path) -> None:
+        cmd = self._invoke(["--resume", "abc123"], tmp_path)
+        assert cmd == ["/usr/bin/codex", "resume", "abc123"]
+
+    def test_continue_flag_maps_to_continue(self, tmp_path: Path) -> None:
+        cmd = self._invoke(["--continue"], tmp_path)
+        assert cmd == ["/usr/bin/codex", "continue"]
+
+    def test_last_flag_maps_to_resume_last(self, tmp_path: Path) -> None:
+        cmd = self._invoke(["--last"], tmp_path)
+        assert cmd == ["/usr/bin/codex", "resume", "--last"]
+
+    def test_all_flag_maps_to_resume_all(self, tmp_path: Path) -> None:
+        cmd = self._invoke(["--all"], tmp_path)
+        assert cmd == ["/usr/bin/codex", "resume", "--all"]
+
+
 class TestCodexListSessions:
     """``myagents codex --list`` reports resumable sessions."""
 

tests/test_entrypoints.py

@@ -102,7 +102,6 @@ class TestMycodexEntrypoint:
             patch("myagents.launcher.subprocess.run") as mock_run,
         ):
             mock_run.return_value = MagicMock(returncode=0)
-            result = runner.invoke(codex_cli, ["--cwd", str(tmp_path), "resume", "abc123"])
+            result = runner.invoke(codex_cli, ["--cwd", str(tmp_path), "-r", "abc123"])
             assert result.exit_code == 0
-            assert "resume" in mock_run.call_args[0][0]
-            assert "abc123" in mock_run.call_args[0][0]
+            assert mock_run.call_args[0][0] == ["/usr/bin/codex", "resume", "abc123"]