chore: anchor fresh-start history to upstream

hermes_cli/codex_runtime_plugin_migration.py

@@ -9,8 +9,6 @@ from dataclasses import dataclass, field
 from pathlib import Path
 from typing import Any, Optional
 
-from agent.transports.hermes_tools_mcp_server import HERMES_TOOLS_MCP_SERVER_NAME
-
 logger = logging.getLogger(__name__)
 
 
@@ -376,9 +374,21 @@ def _build_hermes_tools_mcp_entry() -> dict:
 
 
 def _write_atomic(target: Path, text: str) -> None:
-    """Atomic rewrite so a crash mid-write never leaves a half-written config.toml codex refuses to load."""
-    from utils import atomic_write_text
-    atomic_write_text(target, text, tmp_prefix=".config.toml.", preserve_mode=True)
+    """Write via a same-directory temp file + rename (atomic on POSIX, ReplaceFile on Windows) so a
+    crash mid-write never leaves a half-written config.toml that codex would refuse to load."""
+    import tempfile
+    tmp_fd, tmp_path_str = tempfile.mkstemp(prefix=".config.toml.", dir=str(target.parent))
+    tmp_path = Path(tmp_path_str)
+    try:
+        with os.fdopen(tmp_fd, "w", encoding="utf-8") as fh:
+            fh.write(text)
+        tmp_path.replace(target)
+    except Exception:
+        try:
+            tmp_path.unlink(missing_ok=True)
+        except Exception:
+            pass
+        raise
 
 
 def migrate(
@@ -427,9 +437,9 @@ def migrate(
     if default_permission_profile:
         report.wrote_permissions_default = default_permission_profile
     if expose_hermes_tools:
-        translated[HERMES_TOOLS_MCP_SERVER_NAME] = _build_hermes_tools_mcp_entry()
-        if HERMES_TOOLS_MCP_SERVER_NAME not in report.migrated:
-            report.migrated.append(HERMES_TOOLS_MCP_SERVER_NAME)
+        translated["hermes-tools"] = _build_hermes_tools_mcp_entry()
+        if "hermes-tools" not in report.migrated:
+            report.migrated.append("hermes-tools")
     managed_block = render_codex_toml_section(
         translated, plugins=plugins, default_permission_profile=default_permission_profile)
     new_text = managed_block