chore(agents): 修 ruff 遗留问题（B904/SIM105/SIM117/I001）

provider.py 三处 except KeyError 后 raise 补 from None 阻断异常链；version.py
与 secrets.py 用 contextlib.suppress 替代 try-except-pass；test_cli.py 嵌套
with 合并；secrets.py/test_entrypoints.py 导入排序。

myagents/commands/provider.py

@@ -196,7 +196,7 @@ def provider_cmd(
         known = ", ".join(p.id for p in list_providers())
         raise click.ClickException(
             f"Unknown provider '{provider_id}'. Choose from: {known}"
-        )
+        ) from None
 
     _do_switch(provider, key=key, model=model, base_url=base_url, yes=yes)
 
@@ -229,7 +229,7 @@ def provider_key_set(provider_id: str, key: str | None) -> None:
         known = ", ".join(p.id for p in list_providers())
         raise click.ClickException(
             f"Unknown provider '{provider_id}'. Choose from: {known}"
-        )
+        ) from None
 
     if provider.id == "claude":
         raise click.ClickException(
@@ -259,7 +259,7 @@ def provider_key_rm(provider_id: str, yes: bool) -> None:
         known = ", ".join(p.id for p in list_providers())
         raise click.ClickException(
             f"Unknown provider '{provider_id}'. Choose from: {known}"
-        )
+        ) from None
 
     if not yes and not click.confirm(
         f"Remove stored key for {provider.display_name}?",

myagents/commands/version.py

@@ -1,5 +1,6 @@
 """``version`` — show package install location."""
 
+import contextlib
 import shutil
 import subprocess
 from importlib.metadata import PackageNotFoundError, version
@@ -59,10 +60,8 @@ def version_cmd() -> None:
     bin_path = shutil.which("myagents") or "?"
     console.print(f"[bold]myagents[/bold] (bin: {bin_path})")
 
-    try:
+    with contextlib.suppress(PackageNotFoundError):
         console.print(f"  version: [cyan]{version('myagents')}[/cyan]")
-    except PackageNotFoundError:
-        pass
 
     tree = _pkg_tree(myagents.__file__)
     mode, detail = describe_tree(tree)

myagents/secrets.py

@@ -13,6 +13,7 @@ keys shadow mytoolkit keys without modifying them.
 
 from __future__ import annotations
 
+import contextlib
 import json
 import os
 import stat
@@ -20,7 +21,6 @@ import tempfile
 from pathlib import Path
 from typing import Any
 
-
 XIAOHE_CONFIG_DIR = Path.home() / ".xiaohe" / "agent"
 XIAOHE_CONFIG_PATH = XIAOHE_CONFIG_DIR / "config.json"
 
@@ -53,10 +53,8 @@ def _atomic_write(path: Path, data: dict[str, Any]) -> None:
             os.chmod(tmp, stat.S_IRUSR | stat.S_IWUSR)
         os.replace(tmp, path)
     except Exception:
-        try:
+        with contextlib.suppress(OSError):
             os.unlink(tmp)
-        except OSError:
-            pass
         raise
 
 

tests/test_cli.py

@@ -766,9 +766,11 @@ class TestDshListSessions:
                 }
             ),
         ]
-        with log.open("wb") as fh:
-            with zstd.ZstdCompressor().stream_writer(fh) as w:
-                w.write(("\n".join(lines) + "\n").encode("utf-8"))
+        with (
+            log.open("wb") as fh,
+            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:

tests/test_entrypoints.py

@@ -14,6 +14,7 @@ from myagents.entrypoints import (
     kimi_cli,
 )
 
+
 class TestMyclaudeEntrypoint:
     """``myclaude`` standalone entrypoint."""