refactor: remove unused Python imports across tooling

Author: sjarmak

agents/ablation_config.py

@@ -11,7 +11,6 @@
 import yaml
 from dataclasses import dataclass, field
 from pathlib import Path
-from typing import Optional
 
 
 @dataclass

agents/claude_baseline_agent.py

@@ -510,7 +510,6 @@ def _get_session_dir(self):
         Fix: filter out 'subagents' directories and return the top-level session dir
         which always contains the main session JSONL file.
         """
-        from pathlib import Path
 
         sessions_root = self.logs_dir / "sessions"
         if not sessions_root.exists():

agents/mcp_agents.py

@@ -11,7 +11,6 @@
 import logging
 import os
 from pathlib import Path
-from typing import Any
 
 from harbor.agents.installed.claude_code import ClaudeCode
 from harbor.agents.installed.base import ExecInput

agents/metrics_aggregator.py

@@ -12,7 +12,6 @@
 from dataclasses import dataclass, field
 from datetime import datetime
 from pathlib import Path
-from typing import Optional
 
 from .metrics_extractor import TrialMetrics, extract_trial_metrics
 

agents/metrics_extractor.py

@@ -10,7 +10,6 @@
 """
 
 import json
-import re
 from collections import Counter
 from dataclasses import dataclass, field, asdict
 from datetime import datetime

agents/report_generator.py

@@ -6,7 +6,6 @@
 
 from datetime import datetime
 from pathlib import Path
-from typing import Optional
 
 from .metrics_aggregator import JobMetrics, AgentMetrics
 

lib/cli.py

@@ -14,9 +14,7 @@
 import argparse
 import json
 import sys
-from datetime import datetime
 from pathlib import Path
-from typing import NoReturn
 
 
 def main() -> int:

lib/exporter/canonical.py

@@ -6,15 +6,14 @@
 from __future__ import annotations
 
 import json
-from dataclasses import dataclass, field, asdict
+from dataclasses import dataclass, field
 from datetime import datetime
 from pathlib import Path
-from typing import Any
 
-from lib.matrix.expander import RunSpec, PairSpec
+from lib.matrix.expander import RunSpec
 from lib.runner.pair_scheduler import ScheduledRun, PairExecution
 from lib.runner.manifest import ExperimentManifest
-from lib.exporter.harbor_parser import HarborParser, HarborJobResult, HarborTrialResult
+from lib.exporter.harbor_parser import HarborParser, HarborJobResult
 
 
 @dataclass

lib/exporter/comparison.py

@@ -7,12 +7,11 @@
 
 import json
 from dataclasses import dataclass, field
-from datetime import datetime
 from pathlib import Path
-from typing import Any, TYPE_CHECKING
+from typing import TYPE_CHECKING
 
 from lib.matrix.expander import PairSpec
-from lib.runner.pair_scheduler import PairExecution, RunStatus
+from lib.runner.pair_scheduler import PairExecution
 
 if TYPE_CHECKING:
     from lib.exporter.canonical import V2Exporter

lib/exporter/harbor_parser.py

@@ -10,7 +10,6 @@
 from collections import defaultdict
 from dataclasses import dataclass, field
 from pathlib import Path
-from typing import Any
 
 
 @dataclass