fix(acms): resolve all reviewer feedback for context policy loader and plan execution integration

Fixed all blocking issues identified in 4 REQUEST_CHANGES reviews:

- Removed broken ContextPolicy import (root cause of all CI failures)
- Fixed all ruff lint violations: deprecated typing aliases, format parameter shadowing built-in, unused imports, imports inside functions, SIM115/SIM102
- Fixed Behave step ambiguity and duplicate step definitions across files
- Fixed context.config collision with Behave's internal config attribute
- Added CHANGELOG entry for the new ACMS context policy feature
- Added CONTRIBUTORS.md entry for HAL9000
- Added performance benchmark file: benchmarks/acms_context_policy_bench.py
- Fixed pre-existing lint errors in scripts/validate_automation_tracking.py
- Wired PlanExecutionACMSIntegration documentation to explain integration point

ISSUES CLOSED: #9584

benchmarks/acms_context_policy_bench.py

@@ -0,0 +1,178 @@
+"""ASV benchmarks for ACMS context policy loader and plan execution integration.
+
+Measures the performance of:
+- ContextPolicyConfigurationLoader.load_from_string (YAML and TOML)
+- ACMSContextAssembler.assemble_context with varying policy counts
+- PlanExecutionACMSIntegration.prepare_llm_context with and without policies
+- PolicyScope.matches with scalar and list values
+"""
+
+from __future__ import annotations
+
+import importlib
+import sys
+from pathlib import Path
+
+_SRC = str(Path(__file__).resolve().parents[1] / "src")
+if _SRC not in sys.path:
+    sys.path.insert(0, _SRC)
+
+import cleveragents  # noqa: E402
+
+importlib.reload(cleveragents)
+
+from cleveragents.acms.context_policy_loader import (  # noqa: E402
+    ContextPolicyConfigurationLoader,
+    PolicyScope,
+)
+from cleveragents.acms.plan_execution_integration import (  # noqa: E402
+    ACMSContextAssembler,
+    PlanExecutionACMSIntegration,
+)
+
+_YAML_CONFIG_1 = """
+view_name: bench_view
+policies:
+  - name: policy1
+    priority_weight: 1.0
+    scopes:
+      - name: file_type
+        value: python
+"""
+
+_YAML_CONFIG_10 = """
+view_name: bench_view
+policies:
+""" + "\n".join(
+    f"  - name: policy{i}\n    priority_weight: {i}.0"
+    for i in range(10)
+)
+
+_YAML_CONFIG_100 = """
+view_name: bench_view
+policies:
+""" + "\n".join(
+    f"  - name: policy{i}\n    priority_weight: {i}.0"
+    for i in range(100)
+)
+
+_TOML_CONFIG_1 = """
+view_name = "bench_view"
+[[policies]]
+name = "policy1"
+priority_weight = 1.0
+"""
+
+
+class LoaderSuite:
+    """Benchmark ContextPolicyConfigurationLoader throughput."""
+
+    def setup(self) -> None:
+        """Set up loader instance."""
+        self._loader = ContextPolicyConfigurationLoader()
+
+    def time_load_yaml_1_policy(self) -> None:
+        """Benchmark loading a YAML config with 1 policy."""
+        self._loader.load_from_string(_YAML_CONFIG_1, "yaml")
+
+    def time_load_yaml_10_policies(self) -> None:
+        """Benchmark loading a YAML config with 10 policies."""
+        self._loader.load_from_string(_YAML_CONFIG_10, "yaml")
+
+    def time_load_yaml_100_policies(self) -> None:
+        """Benchmark loading a YAML config with 100 policies."""
+        self._loader.load_from_string(_YAML_CONFIG_100, "yaml")
+
+    def time_load_toml_1_policy(self) -> None:
+        """Benchmark loading a TOML config with 1 policy."""
+        self._loader.load_from_string(_TOML_CONFIG_1, "toml")
+
+
+class AssemblerSuite:
+    """Benchmark ACMSContextAssembler.assemble_context throughput."""
+
+    def setup(self) -> None:
+        """Set up assembler instances with varying policy counts."""
+        loader = ContextPolicyConfigurationLoader()
+
+        config_1 = loader.load_from_string(_YAML_CONFIG_1, "yaml")
+        config_10 = loader.load_from_string(_YAML_CONFIG_10, "yaml")
+        config_100 = loader.load_from_string(_YAML_CONFIG_100, "yaml")
+
+        self._assembler_1 = ACMSContextAssembler(config_1)
+        self._assembler_10 = ACMSContextAssembler(config_10)
+        self._assembler_100 = ACMSContextAssembler(config_100)
+
+        self._raw_context = {
+            "file_type": "python",
+            "path": "src/module.py",
+            "content": "def hello(): pass",
+        }
+
+    def time_assemble_1_policy(self) -> None:
+        """Benchmark assembling context with 1 policy."""
+        self._assembler_1.assemble_context(self._raw_context)
+
+    def time_assemble_10_policies(self) -> None:
+        """Benchmark assembling context with 10 policies."""
+        self._assembler_10.assemble_context(self._raw_context)
+
+    def time_assemble_100_policies(self) -> None:
+        """Benchmark assembling context with 100 policies."""
+        self._assembler_100.assemble_context(self._raw_context)
+
+
+class IntegrationSuite:
+    """Benchmark PlanExecutionACMSIntegration.prepare_llm_context throughput."""
+
+    def setup(self) -> None:
+        """Set up integration instances."""
+        loader = ContextPolicyConfigurationLoader()
+        config = loader.load_from_string(_YAML_CONFIG_10, "yaml")
+
+        self._integration_no_policy = PlanExecutionACMSIntegration()
+        self._integration_with_policy = PlanExecutionACMSIntegration(
+            policy_config=config
+        )
+        self._raw_context = {
+            "file_type": "python",
+            "path": "src/module.py",
+        }
+
+    def time_prepare_context_no_policy(self) -> None:
+        """Benchmark prepare_llm_context with no policy (passthrough)."""
+        self._integration_no_policy.prepare_llm_context(self._raw_context)
+
+    def time_prepare_context_with_policy(self) -> None:
+        """Benchmark prepare_llm_context with ACMS policy assembly."""
+        self._integration_with_policy.prepare_llm_context(self._raw_context)
+
+
+class PolicyScopeSuite:
+    """Benchmark PolicyScope.matches throughput."""
+
+    def setup(self) -> None:
+        """Set up scope instances."""
+        self._scope_scalar = PolicyScope(name="file_type", value="python")
+        self._scope_list = PolicyScope(
+            name="file_type", value=["python", "javascript", "typescript"]
+        )
+        self._context_match = {"file_type": "python"}
+        self._context_no_match = {"file_type": "java"}
+        self._context_list = {"file_type": ["python", "rust"]}
+
+    def time_scope_scalar_match(self) -> None:
+        """Benchmark scalar scope match."""
+        self._scope_scalar.matches(self._context_match)
+
+    def time_scope_scalar_no_match(self) -> None:
+        """Benchmark scalar scope no-match."""
+        self._scope_scalar.matches(self._context_no_match)
+
+    def time_scope_list_match(self) -> None:
+        """Benchmark list scope match."""
+        self._scope_list.matches(self._context_match)
+
+    def time_scope_context_list_match(self) -> None:
+        """Benchmark scope match against list context value."""
+        self._scope_scalar.matches(self._context_list)