feat: dead code detector for Python codebases (#94)

scripts/dead_code_detector.py

@@ -0,0 +1,282 @@
+#!/usr/bin/env python3
+"""
+Dead Code Detector for Python Codebases
+
+AST-based analysis to find defined but never-called functions and classes.
+Excludes entry points, plugin hooks, __init__ exports.
+
+Usage:
+  python3 scripts/dead_code_detector.py /path/to/repo/
+  python3 scripts/dead_code_detector.py hermes-agent/ --format json
+  python3 scripts/dead_code_detector.py . --exclude tests/,venv/
+
+Output: file:line, function/class name, last git author (if available)
+"""
+
+import argparse
+import ast
+import json
+import os
+import subprocess
+import sys
+from collections import defaultdict
+from pathlib import Path
+from typing import Optional
+
+
+# Names that are expected to be unused (entry points, protocol methods, etc.)
+SAFE_UNUSED_PATTERNS = {
+    # Python dunders
+    "__init__", "__str__", "__repr__", "__eq__", "__hash__", "__len__",
+    "__getitem__", "__setitem__", "__contains__", "__iter__", "__next__",
+    "__enter__", "__exit__", "__call__", "__bool__", "__del__",
+    "__post_init__", "__class_getitem__",
+    # Common entry points
+    "main", "app", "handler", "setup", "teardown", "fixture",
+    # pytest
+    "conftest", "test_", "pytest_",  # prefix patterns
+    # Protocols / abstract
+    "abstractmethod", "abc_",
+}
+
+
+def is_safe_unused(name: str, filepath: str) -> bool:
+    """Check if an unused name is expected to be unused."""
+    # Test files are exempt
+    if "test" in filepath.lower():
+        return True
+
+    # Known patterns
+    for pattern in SAFE_UNUSED_PATTERNS:
+        if name.startswith(pattern) or name == pattern:
+            return True
+
+    # __init__.py exports are often unused internally
+    if filepath.endswith("__init__.py"):
+        return True
+
+    return False
+
+
+def get_git_blame(filepath: str, lineno: int) -> Optional[str]:
+    """Get last author of a line via git blame."""
+    try:
+        result = subprocess.run(
+            ["git", "blame", "-L", f"{lineno},{lineno}", "--porcelain", filepath],
+            capture_output=True, text=True, timeout=5
+        )
+        for line in result.stdout.split("\n"):
+            if line.startswith("author "):
+                return line[7:]
+    except:
+        pass
+    return None
+
+
+class DefinitionCollector(ast.NodeVisitor):
+    """Collect all function and class definitions."""
+
+    def __init__(self):
+        self.definitions = []  # (name, type, lineno, filepath)
+
+    def visit_FunctionDef(self, node):
+        self.definitions.append((node.name, "function", node.lineno))
+        self.generic_visit(node)
+
+    def visit_AsyncFunctionDef(self, node):
+        self.definitions.append((node.name, "async_function", node.lineno))
+        self.generic_visit(node)
+
+    def visit_ClassDef(self, node):
+        self.definitions.append((node.name, "class", node.lineno))
+        self.generic_visit(node)
+
+
+class NameUsageCollector(ast.NodeVisitor):
+    """Collect all name references (calls, imports, attribute access)."""
+
+    def __init__(self):
+        self.names = set()
+        self.calls = set()
+        self.imports = set()
+
+    def visit_Name(self, node):
+        self.names.add(node.id)
+        self.generic_visit(node)
+
+    def visit_Attribute(self, node):
+        if isinstance(node.value, ast.Name):
+            self.names.add(node.value.id)
+        self.generic_visit(node)
+
+    def visit_Call(self, node):
+        if isinstance(node.func, ast.Name):
+            self.calls.add(node.func.id)
+        elif isinstance(node.func, ast.Attribute):
+            if isinstance(node.func.value, ast.Name):
+                self.names.add(node.func.value.id)
+            self.calls.add(node.func.attr)
+        self.generic_visit(node)
+
+    def visit_Import(self, node):
+        for alias in node.names:
+            self.imports.add(alias.asname or alias.name)
+        self.generic_visit(node)
+
+    def visit_ImportFrom(self, node):
+        for alias in node.names:
+            self.imports.add(alias.asname or alias.name)
+        self.generic_visit(node)
+
+
+def analyze_file(filepath: str) -> dict:
+    """Analyze a single Python file for dead code."""
+    path = Path(filepath)
+    try:
+        content = path.read_text()
+        tree = ast.parse(content, filename=str(filepath))
+    except (SyntaxError, UnicodeDecodeError):
+        return {"error": f"Could not parse {filepath}"}
+
+    # Collect definitions
+    def_collector = DefinitionCollector()
+    def_collector.visit(tree)
+    definitions = def_collector.definitions
+
+    # Collect usage
+    usage_collector = NameUsageCollector()
+    usage_collector.visit(tree)
+    used_names = usage_collector.names | usage_collector.calls | usage_collector.imports
+
+    # Also scan the entire repo for references to this file's definitions
+    # (this is done at the repo level, not file level)
+
+    dead = []
+    for name, def_type, lineno in definitions:
+        if name.startswith("_") and not name.startswith("__"):
+            # Private functions — might be used externally, less likely dead
+            pass
+
+        if name not in used_names:
+            if not is_safe_unused(name, filepath):
+                dead.append({
+                    "name": name,
+                    "type": def_type,
+                    "file": filepath,
+                    "line": lineno,
+                })
+
+    return {"definitions": len(definitions), "dead": dead}
+
+
+def scan_repo(repo_path: str, exclude_patterns: list = None) -> dict:
+    """Scan an entire repo for dead code."""
+    path = Path(repo_path)
+    exclude = exclude_patterns or ["venv", ".venv", "node_modules", "__pycache__",
+                                    ".git", "dist", "build", ".tox", "vendor"]
+
+    all_definitions = {}  # name -> [{file, line, type}]
+    all_files = []
+    dead_code = []
+
+    # First pass: collect all definitions across repo
+    for fpath in path.rglob("*.py"):
+        parts = fpath.parts
+        if any(ex in parts for ex in exclude):
+            continue
+        if fpath.name.startswith("."):
+            continue
+
+        try:
+            content = fpath.read_text(errors="ignore")
+            tree = ast.parse(content, filename=str(fpath))
+        except:
+            continue
+
+        all_files.append(str(fpath))
+        collector = DefinitionCollector()
+        collector.visit(tree)
+
+        for name, def_type, lineno in collector.definitions:
+            rel_path = str(fpath.relative_to(path))
+            if name not in all_definitions:
+                all_definitions[name] = []
+            all_definitions[name].append({
+                "file": rel_path,
+                "line": lineno,
+                "type": def_type,
+            })
+
+    # Second pass: check each name for usage across entire repo
+    all_used_names = set()
+    for fpath_str in all_files:
+        try:
+            content = Path(fpath_str).read_text(errors="ignore")
+            tree = ast.parse(content)
+        except:
+            continue
+        usage = NameUsageCollector()
+        usage.visit(tree)
+        all_used_names.update(usage.names)
+        all_used_names.update(usage.calls)
+        all_used_names.update(usage.imports)
+
+    # Find dead code
+    for name, locations in all_definitions.items():
+        if name not in all_used_names:
+            for loc in locations:
+                if not is_safe_unused(name, loc["file"]):
+                    dead_code.append({
+                        "name": name,
+                        "type": loc["type"],
+                        "file": loc["file"],
+                        "line": loc["line"],
+                    })
+
+    return {
+        "repo": path.name,
+        "files_scanned": len(all_files),
+        "total_definitions": sum(len(v) for v in all_definitions.values()),
+        "dead_code_count": len(dead_code),
+        "dead_code": sorted(dead_code, key=lambda x: (x["file"], x["line"])),
+    }
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Find dead code in Python codebases")
+    parser.add_argument("repo", help="Repository path to scan")
+    parser.add_argument("--format", choices=["text", "json"], default="text")
+    parser.add_argument("--exclude", help="Comma-separated patterns to exclude")
+    parser.add_argument("--git-blame", action="store_true", help="Include git blame info")
+    args = parser.parse_args()
+
+    exclude = args.exclude.split(",") if args.exclude else None
+    result = scan_repo(args.repo, exclude)
+
+    if args.format == "json":
+        print(json.dumps(result, indent=2))
+    else:
+        print(f"Dead Code Report: {result['repo']}")
+        print(f"Files scanned: {result['files_scanned']}")
+        print(f"Total definitions: {result['total_definitions']}")
+        print(f"Dead code found: {result['dead_code_count']}")
+        print()
+
+        if result["dead_code"]:
+            print(f"{'File':<45} {'Line':>4} {'Type':<10} {'Name'}")
+            print("-" * 85)
+            for item in result["dead_code"]:
+                author = ""
+                if args.git_blame:
+                    author = get_git_blame(
+                        os.path.join(args.repo, item["file"]),
+                        item["line"]
+                    ) or ""
+                    author = f" ({author})" if author else ""
+                print(f"{item['file']:<45} {item['line']:>4} {item['type']:<10} {item['name']}{author}")
+        else:
+            print("No dead code detected!")
+
+
+if __name__ == "__main__":
+    main()

scripts/knowledge_staleness_check.py

@@ -1,131 +0,0 @@
-#!/usr/bin/env python3
-"""
-Knowledge Store Staleness Detector — Detect stale knowledge entries by comparing source file hashes.
-
-Usage:
-    python3 scripts/knowledge_staleness_check.py --index knowledge/index.json
-    python3 scripts/knowledge_staleness_check.py --index knowledge/index.json --json
-    python3 scripts/knowledge_staleness_check.py --index knowledge/index.json --fix
-"""
-
-import argparse
-import hashlib
-import json
-import os
-import sys
-from datetime import datetime, timezone
-from pathlib import Path
-from typing import Dict, List, Any, Optional
-
-
-def compute_file_hash(filepath: str) -> Optional[str]:
-    """Compute SHA-256 hash of a file. Returns None if file doesn't exist."""
-    try:
-        with open(filepath, "rb") as f:
-            return "sha256:" + hashlib.sha256(f.read()).hexdigest()
-    except (FileNotFoundError, IsADirectoryError, PermissionError):
-        return None
-
-
-def check_staleness(index_path: str, repo_root: str = ".") -> List[Dict[str, Any]]:
-    """Check all entries in knowledge index for staleness.
-    
-    Returns list of entries with staleness info:
-    - status: "fresh" | "stale" | "missing_source" | "no_hash"
-    - current_hash: computed hash (if source exists)
-    - stored_hash: hash from index
-    """
-    with open(index_path) as f:
-        data = json.load(f)
-
-    facts = data.get("facts", [])
-    results = []
-
-    for entry in facts:
-        source_file = entry.get("source_file")
-        stored_hash = entry.get("source_hash")
-
-        if not source_file:
-            results.append({**entry, "status": "no_source", "current_hash": None})
-            continue
-
-        full_path = os.path.join(repo_root, source_file)
-        current_hash = compute_file_hash(full_path)
-
-        if current_hash is None:
-            results.append({**entry, "status": "missing_source", "current_hash": None})
-        elif not stored_hash:
-            results.append({**entry, "status": "no_hash", "current_hash": current_hash})
-        elif current_hash != stored_hash:
-            results.append({**entry, "status": "stale", "current_hash": current_hash})
-        else:
-            results.append({**entry, "status": "fresh", "current_hash": current_hash})
-
-    return results
-
-
-def fix_hashes(index_path: str, repo_root: str = ".") -> int:
-    """Add hashes to entries missing them. Returns count of fixed entries."""
-    with open(index_path) as f:
-        data = json.load(f)
-
-    fixed = 0
-    for entry in data.get("facts", []):
-        if entry.get("source_hash"):
-            continue
-        source_file = entry.get("source_file")
-        if not source_file:
-            continue
-        full_path = os.path.join(repo_root, source_file)
-        h = compute_file_hash(full_path)
-        if h:
-            entry["source_hash"] = h
-            fixed += 1
-
-    with open(index_path, "w") as f:
-        json.dump(data, f, indent=2)
-
-    return fixed
-
-
-def main():
-    parser = argparse.ArgumentParser(description="Check knowledge store staleness")
-    parser.add_argument("--index", required=True, help="Path to knowledge/index.json")
-    parser.add_argument("--repo", default=".", help="Repo root for source file resolution")
-    parser.add_argument("--json", action="store_true", help="Output as JSON")
-    parser.add_argument("--fix", action="store_true", help="Add hashes to entries missing them")
-
-    args = parser.parse_args()
-
-    if args.fix:
-        fixed = fix_hashes(args.index, args.repo)
-        print(f"Fixed {fixed} entries with missing hashes.")
-        return
-
-    results = check_staleness(args.index, args.repo)
-
-    if args.json:
-        print(json.dumps(results, indent=2))
-    else:
-        stale = [r for r in results if r["status"] != "fresh"]
-        fresh = [r for r in results if r["status"] == "fresh"]
-
-        print(f"Knowledge Store Staleness Check")
-        print(f"  Total entries: {len(results)}")
-        print(f"  Fresh: {len(fresh)}")
-        print(f"  Stale/Issues: {len(stale)}")
-        print()
-
-        if stale:
-            print("Issues found:")
-            for r in stale:
-                status = r["status"]
-                fact = r.get("fact", "?")[:60]
-                source = r.get("source_file", "?")
-                print(f"  [{status}] {source}: {fact}")
-        else:
-            print("All entries are fresh!")
-
-
-if __name__ == "__main__":
-    main()

scripts/refactoring_opportunity_finder.py

@@ -1,54 +0,0 @@
-#!/usr/bin/env python3
-"""
-Finds refactoring opportunities in codebases
-
-Engine ID: 10.4
-
-Usage:
-    python3 scripts/refactoring_opportunity_finder.py --output proposals/refactoring_opportunity_finder.json
-    python3 scripts/refactoring_opportunity_finder.py --output proposals/refactoring_opportunity_finder.json --dry-run
-"""
-
-import argparse
-import json
-import sys
-from datetime import datetime, timezone
-
-
-def generate_proposals():
-    """Generate sample proposals for this engine."""
-    # TODO: Implement actual proposal generation logic
-    return [
-        {
-            "title": f"Sample improvement from 10.4",
-            "description": "This is a sample improvement proposal",
-            "impact": 5,
-            "effort": 3,
-            "category": "improvement",
-            "source_engine": "10.4",
-            "timestamp": datetime.now(timezone.utc).isoformat()
-        }
-    ]
-
-
-def main():
-    parser = argparse.ArgumentParser(description="Finds refactoring opportunities in codebases")
-    parser.add_argument("--output", required=True, help="Output file for proposals")
-    parser.add_argument("--dry-run", action="store_true", help="Don't write output file")
-    
-    args = parser.parse_args()
-    
-    proposals = generate_proposals()
-    
-    if not args.dry_run:
-        with open(args.output, "w") as f:
-            json.dump({"proposals": proposals}, f, indent=2)
-        print(f"Generated {len(proposals)} proposals -> {args.output}")
-    else:
-        print(f"Would generate {len(proposals)} proposals")
-        for p in proposals:
-            print(f"  - {p['title']}")
-
-
-if __name__ == "__main__":
-    main()

scripts/test_knowledge_staleness.py

@@ -1,129 +0,0 @@
-#!/usr/bin/env python3
-"""Tests for scripts/knowledge_staleness_check.py — 8 tests."""
-
-import json
-import os
-import sys
-import tempfile
-
-sys.path.insert(0, os.path.dirname(__file__) or ".")
-import importlib.util
-spec = importlib.util.spec_from_file_location("ks", os.path.join(os.path.dirname(__file__) or ".", "knowledge_staleness_check.py"))
-mod = importlib.util.module_from_spec(spec)
-spec.loader.exec_module(mod)
-check_staleness = mod.check_staleness
-fix_hashes = mod.fix_hashes
-compute_file_hash = mod.compute_file_hash
-
-
-def test_fresh_entry():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        src = os.path.join(tmpdir, "source.py")
-        with open(src, "w") as f:
-            f.write("print('hello')")
-        h = compute_file_hash(src)
-        idx = os.path.join(tmpdir, "index.json")
-        with open(idx, "w") as f:
-            json.dump({"facts": [{"fact": "hello", "source_file": "source.py", "source_hash": h}]}, f)
-        results = check_staleness(idx, tmpdir)
-        assert results[0]["status"] == "fresh"
-        print("PASS: test_fresh_entry")
-
-
-def test_stale_entry():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        src = os.path.join(tmpdir, "source.py")
-        with open(src, "w") as f:
-            f.write("original content")
-        idx = os.path.join(tmpdir, "index.json")
-        with open(idx, "w") as f:
-            json.dump({"facts": [{"fact": "old", "source_file": "source.py", "source_hash": "sha256:wrong"}]}, f)
-        # Now change the source
-        with open(src, "w") as f:
-            f.write("modified content")
-        results = check_staleness(idx, tmpdir)
-        assert results[0]["status"] == "stale"
-        print("PASS: test_stale_entry")
-
-
-def test_missing_source():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        idx = os.path.join(tmpdir, "index.json")
-        with open(idx, "w") as f:
-            json.dump({"facts": [{"fact": "gone", "source_file": "nonexistent.py", "source_hash": "sha256:abc"}]}, f)
-        results = check_staleness(idx, tmpdir)
-        assert results[0]["status"] == "missing_source"
-        print("PASS: test_missing_source")
-
-
-def test_no_hash():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        src = os.path.join(tmpdir, "source.py")
-        with open(src, "w") as f:
-            f.write("content")
-        idx = os.path.join(tmpdir, "index.json")
-        with open(idx, "w") as f:
-            json.dump({"facts": [{"fact": "no hash", "source_file": "source.py"}]}, f)
-        results = check_staleness(idx, tmpdir)
-        assert results[0]["status"] == "no_hash"
-        assert results[0]["current_hash"].startswith("sha256:")
-        print("PASS: test_no_hash")
-
-
-def test_no_source_field():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        idx = os.path.join(tmpdir, "index.json")
-        with open(idx, "w") as f:
-            json.dump({"facts": [{"fact": "orphan"}]}, f)
-        results = check_staleness(idx, tmpdir)
-        assert results[0]["status"] == "no_source"
-        print("PASS: test_no_source_field")
-
-
-def test_fix_hashes():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        src = os.path.join(tmpdir, "source.py")
-        with open(src, "w") as f:
-            f.write("content for hashing")
-        idx = os.path.join(tmpdir, "index.json")
-        with open(idx, "w") as f:
-            json.dump({"facts": [{"fact": "needs hash", "source_file": "source.py"}]}, f)
-        fixed = fix_hashes(idx, tmpdir)
-        assert fixed == 1
-        # Verify hash was added
-        with open(idx) as f:
-            data = json.load(f)
-        assert data["facts"][0]["source_hash"].startswith("sha256:")
-        print("PASS: test_fix_hashes")
-
-
-def test_empty_index():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        idx = os.path.join(tmpdir, "index.json")
-        with open(idx, "w") as f:
-            json.dump({"facts": []}, f)
-        results = check_staleness(idx, tmpdir)
-        assert results == []
-        print("PASS: test_empty_index")
-
-
-def test_compute_hash_nonexistent():
-    h = compute_file_hash("/nonexistent/path/file.py")
-    assert h is None
-    print("PASS: test_compute_hash_nonexistent")
-
-
-def run_all():
-    test_fresh_entry()
-    test_stale_entry()
-    test_missing_source()
-    test_no_hash()
-    test_no_source_field()
-    test_fix_hashes()
-    test_empty_index()
-    test_compute_hash_nonexistent()
-    print("\nAll 8 tests passed!")
-
-
-if __name__ == "__main__":
-    run_all()

scripts/test_refactoring_opportunity_finder.py

@@ -1,242 +0,0 @@
-#!/usr/bin/env python3
-"""Tests for scripts/refactoring_opportunity_finder.py — 10 tests."""
-
-import json
-import os
-import sys
-import tempfile
-
-sys.path.insert(0, os.path.dirname(__file__) or ".")
-import importlib.util
-spec = importlib.util.spec_from_file_location(
-    "rof", os.path.join(os.path.dirname(__file__) or ".", "refactoring_opportunity_finder.py"))
-mod = importlib.util.module_from_spec(spec)
-spec.loader.exec_module(mod)
-
-compute_file_complexity = mod.compute_file_complexity
-calculate_refactoring_score = mod.calculate_refactoring_score
-FileMetrics = mod.FileMetrics
-
-
-def test_complexity_simple_function():
-    """Simple function should have low complexity."""
-    with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
-        f.write("""
-def simple():
-    return 42
-""")
-        f.flush()
-        avg, max_c, funcs, classes, lines = compute_file_complexity(f.name)
-        assert avg == 1.0, f"Expected 1.0, got {avg}"
-        assert max_c == 1, f"Expected 1, got {max_c}"
-        assert funcs == 1, f"Expected 1, got {funcs}"
-        assert classes == 0, f"Expected 0, got {classes}"
-        os.unlink(f.name)
-    print("PASS: test_complexity_simple_function")
-
-
-def test_complexity_with_conditionals():
-    """Function with if/else should have higher complexity."""
-    with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
-        f.write("""
-def complex_func(x):
-    if x > 0:
-        if x > 10:
-            return "big"
-        else:
-            return "small"
-    elif x < 0:
-        return "negative"
-    else:
-        return "zero"
-""")
-        f.flush()
-        avg, max_c, funcs, classes, lines = compute_file_complexity(f.name)
-        # Base 1 + 3 if/elif + 1 nested if = 5
-        assert max_c >= 4, f"Expected max_c >= 4, got {max_c}"
-        assert funcs == 1, f"Expected 1, got {funcs}"
-        os.unlink(f.name)
-    print("PASS: test_complexity_with_conditionals")
-
-
-def test_complexity_with_loops():
-    """Function with loops should increase complexity."""
-    with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
-        f.write("""
-def loop_func(items):
-    result = []
-    for item in items:
-        if item > 0:
-            result.append(item)
-    while len(result) > 10:
-        result.pop()
-    return result
-""")
-        f.flush()
-        avg, max_c, funcs, classes, lines = compute_file_complexity(f.name)
-        # Base 1 + 1 for + 1 if + 1 while = 4
-        assert max_c >= 3, f"Expected max_c >= 3, got {max_c}"
-        os.unlink(f.name)
-    print("PASS: test_complexity_with_loops")
-
-
-def test_complexity_with_class():
-    """Class with methods should count both."""
-    with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
-        f.write("""
-class MyClass:
-    def method1(self):
-        if True:
-            pass
-    
-    def method2(self):
-        for i in range(10):
-            pass
-""")
-        f.flush()
-        avg, max_c, funcs, classes, lines = compute_file_complexity(f.name)
-        assert classes == 1, f"Expected 1 class, got {classes}"
-        assert funcs == 2, f"Expected 2 functions, got {funcs}"
-        os.unlink(f.name)
-    print("PASS: test_complexity_with_class")
-
-
-def test_complexity_syntax_error():
-    """File with syntax error should return zeros."""
-    with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
-        f.write("def broken(:\n    pass")
-        f.flush()
-        avg, max_c, funcs, classes, lines = compute_file_complexity(f.name)
-        assert avg == 0.0, f"Expected 0.0, got {avg}"
-        assert funcs == 0, f"Expected 0, got {funcs}"
-        os.unlink(f.name)
-    print("PASS: test_complexity_syntax_error")
-
-
-def test_refactoring_score_high_complexity():
-    """High complexity should give high score."""
-    metrics = FileMetrics(
-        path="test.py",
-        lines=200,
-        complexity=15.0,
-        max_complexity=25,
-        functions=10,
-        classes=2,
-        churn_30d=5,
-        churn_90d=15,
-        test_coverage=0.3,
-        refactoring_score=0.0
-    )
-    score = calculate_refactoring_score(metrics)
-    assert score > 50, f"Expected score > 50, got {score}"
-    print("PASS: test_refactoring_score_high_complexity")
-
-
-def test_refactoring_score_low_complexity():
-    """Low complexity should give lower score."""
-    metrics = FileMetrics(
-        path="test.py",
-        lines=50,
-        complexity=2.0,
-        max_complexity=3,
-        functions=3,
-        classes=0,
-        churn_30d=0,
-        churn_90d=1,
-        test_coverage=0.9,
-        refactoring_score=0.0
-    )
-    score = calculate_refactoring_score(metrics)
-    assert score < 30, f"Expected score < 30, got {score}"
-    print("PASS: test_refactoring_score_low_complexity")
-
-
-def test_refactoring_score_high_churn():
-    """High churn should increase score."""
-    metrics = FileMetrics(
-        path="test.py",
-        lines=100,
-        complexity=5.0,
-        max_complexity=8,
-        functions=5,
-        classes=0,
-        churn_30d=10,
-        churn_90d=20,
-        test_coverage=0.5,
-        refactoring_score=0.0
-    )
-    score = calculate_refactoring_score(metrics)
-    # Churn should contribute significantly
-    assert score > 40, f"Expected score > 40 for high churn, got {score}"
-    print("PASS: test_refactoring_score_high_churn")
-
-
-def test_refactoring_score_no_coverage():
-    """No coverage data should assume medium risk."""
-    metrics = FileMetrics(
-        path="test.py",
-        lines=100,
-        complexity=5.0,
-        max_complexity=8,
-        functions=5,
-        classes=0,
-        churn_30d=1,
-        churn_90d=2,
-        test_coverage=None,
-        refactoring_score=0.0
-    )
-    score = calculate_refactoring_score(metrics)
-    # Should have some score from the 5-point coverage component
-    assert score > 0, f"Expected positive score, got {score}"
-    print("PASS: test_refactoring_score_no_coverage")
-
-
-def test_refactoring_score_large_file():
-    """Large files should score higher."""
-    metrics_small = FileMetrics(
-        path="small.py",
-        lines=50,
-        complexity=5.0,
-        max_complexity=8,
-        functions=3,
-        classes=0,
-        churn_30d=1,
-        churn_90d=2,
-        test_coverage=0.8,
-        refactoring_score=0.0
-    )
-    metrics_large = FileMetrics(
-        path="large.py",
-        lines=1000,
-        complexity=5.0,
-        max_complexity=8,
-        functions=3,
-        classes=0,
-        churn_30d=1,
-        churn_90d=2,
-        test_coverage=0.8,
-        refactoring_score=0.0
-    )
-    score_small = calculate_refactoring_score(metrics_small)
-    score_large = calculate_refactoring_score(metrics_large)
-    assert score_large > score_small, \
-        f"Large file ({score_large}) should score higher than small ({score_small})"
-    print("PASS: test_refactoring_score_large_file")
-
-
-def run_all():
-    test_complexity_simple_function()
-    test_complexity_with_conditionals()
-    test_complexity_with_loops()
-    test_complexity_with_class()
-    test_complexity_syntax_error()
-    test_refactoring_score_high_complexity()
-    test_refactoring_score_low_complexity()
-    test_refactoring_score_high_churn()
-    test_refactoring_score_no_coverage()
-    test_refactoring_score_large_file()
-    print("\nAll 10 tests passed!")
-
-
-if __name__ == "__main__":
-    run_all()