Python 3.9 friendly UTC timezone.

core/agents/executor.py

@@ -1,4 +1,4 @@
-from datetime import UTC, datetime
+from datetime import datetime, timezone
 from typing import Optional
 
 from pydantic import BaseModel, Field
@@ -96,13 +96,13 @@ async def run(self) -> AgentResponse:
             self.next_state.action = f'Skip "{cmd_name}"'
             return AgentResponse.done(self)
 
-        started_at = datetime.now(UTC)
+        started_at = datetime.now(timezone.utc)
 
         log.info(f"Running command `{cmd}` with timeout {timeout}s")
         status_code, stdout, stderr = await self.process_manager.run_command(cmd, timeout=timeout)
         llm_response = await self.check_command_output(cmd, timeout, stdout, stderr, status_code)
 
-        duration = (datetime.now(UTC) - started_at).total_seconds()
+        duration = (datetime.now(timezone.utc) - started_at).total_seconds()
 
         self.complete()
         self.next_state.action = f'Run "{cmd_name}"'

core/proc/exec_log.py

@@ -1,11 +1,11 @@
-from datetime import UTC, datetime
+from datetime import datetime, timezone
 from typing import Optional
 
 from pydantic import BaseModel, Field
 
 
 class ExecLog(BaseModel):
-    started_at: datetime = Field(default_factory=lambda: datetime.now(UTC))
+    started_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
     duration: float = Field(description="The duration of the command/process run in seconds")
     cmd: str = Field(description="The full command (as executed in the shell)")
     cwd: str = Field(description="The working directory for the command (relative to project root)")