feat: enhance search, ranking, reranker and CLI tooling across ccw and codex-lens

Major improvements to smart-search, chain-search cascade, ranking pipeline,
reranker factory, CLI history store, codex-lens integration, and uv-manager.
Simplify command-generator skill by inlining phases. Add comprehensive tests.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

codex-lens/tests/test_config_search_env_overrides.py

@@ -0,0 +1,83 @@
+"""Unit tests for Config .env overrides for final search ranking penalties."""
+
+from __future__ import annotations
+
+import tempfile
+from pathlib import Path
+
+import pytest
+
+from codexlens.config import Config
+
+
+@pytest.fixture
+def temp_config_dir() -> Path:
+    """Create temporary directory for config data_dir."""
+    tmpdir = tempfile.TemporaryDirectory(ignore_cleanup_errors=True)
+    yield Path(tmpdir.name)
+    try:
+        tmpdir.cleanup()
+    except (PermissionError, OSError):
+        pass
+
+
+def test_search_penalty_env_overrides_apply(temp_config_dir: Path) -> None:
+    config = Config(data_dir=temp_config_dir)
+
+    env_path = temp_config_dir / ".env"
+    env_path.write_text(
+        "\n".join(
+            [
+                "TEST_FILE_PENALTY=0.25",
+                "GENERATED_FILE_PENALTY=0.4",
+                "",
+            ]
+        ),
+        encoding="utf-8",
+    )
+
+    config.load_settings()
+
+    assert config.test_file_penalty == 0.25
+    assert config.generated_file_penalty == 0.4
+
+
+def test_reranker_gpu_env_override_apply(temp_config_dir: Path) -> None:
+    config = Config(data_dir=temp_config_dir)
+
+    env_path = temp_config_dir / ".env"
+    env_path.write_text(
+        "\n".join(
+            [
+                "RERANKER_USE_GPU=false",
+                "",
+            ]
+        ),
+        encoding="utf-8",
+    )
+
+    config.load_settings()
+
+    assert config.reranker_use_gpu is False
+
+
+def test_search_penalty_env_overrides_invalid_ignored(temp_config_dir: Path) -> None:
+    config = Config(data_dir=temp_config_dir)
+
+    env_path = temp_config_dir / ".env"
+    env_path.write_text(
+        "\n".join(
+            [
+                "TEST_FILE_PENALTY=oops",
+                "GENERATED_FILE_PENALTY=nope",
+                "",
+            ]
+        ),
+        encoding="utf-8",
+    )
+
+    config.load_settings()
+
+    assert config.test_file_penalty == 0.15
+    assert config.generated_file_penalty == 0.35
+    assert config.reranker_use_gpu is True