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_gap_identifier.py

@@ -1,275 +0,0 @@
-"""
-Knowledge Gap Identifier — Pipeline 10.7
-
-Cross-references code, docs, and tests to find gaps:
-- Undocumented functions/classes
-- Untested code paths
-- Documented but missing implementations
-- Test files without corresponding source
-
-Produces a gap report with severity and suggestions.
-"""
-
-from __future__ import annotations
-
-import ast
-import os
-import re
-from dataclasses import dataclass, field
-from enum import Enum
-from pathlib import Path
-from typing import Dict, List, Optional, Set
-
-
-class GapSeverity(Enum):
-    INFO = "info"
-    WARNING = "warning"
-    ERROR = "error"
-
-
-class GapType(Enum):
-    UNDOCUMENTED = "undocumented"
-    UNTESTED = "untested"
-    MISSING_IMPLEMENTATION = "missing_implementation"
-    ORPHAN_TEST = "orphan_test"
-    STALE_DOC = "stale_doc"
-
-
-@dataclass
-class Gap:
-    """A single knowledge gap."""
-    gap_type: GapType
-    severity: GapSeverity
-    file: str
-    line: Optional[int]
-    name: str
-    description: str
-    suggestion: str
-
-
-@dataclass
-class GapReport:
-    """Full gap analysis report."""
-    repo_path: str
-    gaps: List[Gap] = field(default_factory=list)
-    stats: Dict[str, int] = field(default_factory=dict)
-
-    def summary(self) -> str:
-        lines = [f"Gap Report for {self.repo_path}", "=" * 40]
-        by_type = {}
-        for g in self.gaps:
-            by_type.setdefault(g.gap_type.value, []).append(g)
-
-        for gtype, items in sorted(by_type.items()):
-            lines.append(f"\n{gtype.upper()} ({len(items)}):")
-            for g in items:
-                loc = f"{g.file}:{g.line}" if g.line else g.file
-                lines.append(f"  [{g.severity.value}] {g.name} @ {loc}")
-                lines.append(f"    {g.description}")
-
-        lines.append(f"\nTotal gaps: {len(self.gaps)}")
-        self.stats = {k: len(v) for k, v in by_type.items()}
-        return "\n".join(lines)
-
-    def to_dict(self) -> dict:
-        return {
-            "repo_path": self.repo_path,
-            "total_gaps": len(self.gaps),
-            "stats": {k: len(v) for k, v in
-                      {gt: [g for g in self.gaps if g.gap_type == gt]
-                       for gt in GapType}.items() if v},
-            "gaps": [
-                {
-                    "type": g.gap_type.value,
-                    "severity": g.severity.value,
-                    "file": g.file,
-                    "line": g.line,
-                    "name": g.name,
-                    "description": g.description,
-                    "suggestion": g.suggestion,
-                }
-                for g in self.gaps
-            ],
-        }
-
-
-def _collect_python_files(root: Path) -> List[Path]:
-    """Collect .py files, excluding venv/node_modules/.git."""
-    skip = {".git", "venv", "env", ".venv", "node_modules", "__pycache__", ".tox", ".mypy_cache"}
-    files = []
-    for dirpath, dirnames, filenames in os.walk(root):
-        dirnames[:] = [d for d in dirnames if d not in skip]
-        for f in filenames:
-            if f.endswith(".py"):
-                files.append(Path(dirpath) / f)
-    return files
-
-
-def _extract_python_symbols(filepath: Path) -> Set[str]:
-    """Extract top-level function and class names from a Python file."""
-    symbols = set()
-    try:
-        source = filepath.read_text(encoding="utf-8", errors="replace")
-        tree = ast.parse(source, filename=str(filepath))
-    except (SyntaxError, UnicodeDecodeError):
-        return symbols
-
-    for node in ast.iter_child_nodes(tree):
-        if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef, ast.ClassDef)):
-            symbols.add(node.name)
-    return symbols
-
-
-def _extract_doc_symbols(filepath: Path) -> Set[str]:
-    """Extract function/class names mentioned in markdown docs."""
-    symbols = set()
-    try:
-        text = filepath.read_text(encoding="utf-8", errors="replace")
-    except (UnicodeDecodeError, OSError):
-        return symbols
-
-    # Match backtick-quoted identifiers: `ClassName`, `func_name`, `func()`
-    for m in re.finditer(r"`([A-Za-z_]\w+)(?:\(\))?`", text):
-        symbols.add(m.group(1))
-    # Match ## ClassName or ### func_name headings
-    for m in re.finditer(r"^#{1,4}\s+(\w+)", text, re.MULTILINE):
-        symbols.add(m.group(1))
-    return symbols
-
-
-def _collect_test_files(root: Path) -> Dict[str, Path]:
-    """Map test module names to their file paths."""
-    test_map = {}
-    for dirpath, dirnames, filenames in os.walk(root):
-        dirnames[:] = [d for d in dirnames if d not in {".git", "venv", "node_modules"}]
-        for f in filenames:
-            if f.startswith("test_") and f.endswith(".py"):
-                # test_foo.py -> foo
-                module_name = f[5:-3]
-                test_map[module_name] = Path(dirpath) / f
-    return test_map
-
-
-class KnowledgeGapIdentifier:
-    """Analyzes a repo for knowledge gaps between code, docs, and tests."""
-
-    def analyze(self, repo_path: str) -> GapReport:
-        root = Path(repo_path).resolve()
-        report = GapReport(repo_path=str(root))
-
-        if not root.is_dir():
-            report.gaps.append(Gap(
-                gap_type=GapType.UNDOCUMENTED,
-                severity=GapSeverity.ERROR,
-                file=str(root),
-                line=None,
-                name="repo",
-                description="Path is not a directory",
-                suggestion="Provide a valid repo directory",
-            ))
-            return report
-
-        # Collect artifacts
-        py_files = _collect_python_files(root)
-        doc_files = list(root.glob("docs/**/*.md")) + list(root.glob("*.md"))
-        test_map = _collect_test_files(root / "tests") if (root / "tests").is_dir() else {}
-
-        # Extract symbols from each source file
-        source_symbols: Dict[str, Set[str]] = {}  # relative_path -> symbols
-        all_source_symbols: Set[str] = set()
-
-        for pf in py_files:
-            rel = str(pf.relative_to(root))
-            # Skip test files and setup/config
-            if "/tests/" in rel or rel.startswith("tests/") or rel.startswith("test_"):
-                continue
-            if pf.name in ("setup.py", "conftest.py", "conf.py"):
-                continue
-
-            syms = _extract_python_symbols(pf)
-            if syms:
-                source_symbols[rel] = syms
-                all_source_symbols.update(syms)
-
-        # Extract documented symbols
-        doc_symbols: Set[str] = set()
-        for df in doc_files:
-            doc_symbols.update(_extract_doc_symbols(df))
-
-        # Extract test-covered symbols
-        tested_modules: Set[str] = set(test_map.keys())
-
-        # --- Find gaps ---
-
-        # 1. Undocumented: source symbols not in any doc
-        for rel_path, syms in source_symbols.items():
-            for sym in sorted(syms):
-                if sym.startswith("_") and not sym.startswith("__"):
-                    continue  # Skip private
-                if sym not in doc_symbols:
-                    report.gaps.append(Gap(
-                        gap_type=GapType.UNDOCUMENTED,
-                        severity=GapSeverity.WARNING,
-                        file=rel_path,
-                        line=None,
-                        name=sym,
-                        description=f"{sym} defined in {rel_path} but not referenced in any docs",
-                        suggestion=f"Add documentation for {sym} in a .md file",
-                    ))
-
-        # 2. Untested: source modules without a corresponding test file
-        for rel_path in source_symbols:
-            module_name = Path(rel_path).stem
-            if module_name not in tested_modules and module_name not in ("__init__", "main", "config"):
-                report.gaps.append(Gap(
-                    gap_type=GapType.UNTESTED,
-                    severity=GapSeverity.ERROR,
-                    file=rel_path,
-                    line=None,
-                    name=module_name,
-                    description=f"No test file found for {rel_path}",
-                    suggestion=f"Create tests/test_{module_name}.py",
-                ))
-
-        # 3. Missing implementation: doc references symbol not in any source
-        referenced_but_missing = doc_symbols - all_source_symbols
-        for sym in sorted(referenced_but_missing):
-            # Filter out common non-code terms
-            if sym.lower() in {"todo", "fixme", "note", "example", "usage", "api",
-                               "install", "setup", "config", "license", "contributing",
-                               "changelog", "readme", "python", "bash", "json", "yaml",
-                               "http", "url", "cli", "gui", "ui", "api", "rest"}:
-                continue
-            if len(sym) < 3:
-                continue
-            report.gaps.append(Gap(
-                gap_type=GapType.MISSING_IMPLEMENTATION,
-                severity=GapSeverity.INFO,
-                file="(docs)",
-                line=None,
-                name=sym,
-                description=f"{sym} referenced in docs but not found in source code",
-                suggestion=f"Verify if {sym} should be implemented or update docs",
-            ))
-
-        # 4. Orphan tests: test files without matching source
-        for test_mod, test_path in test_map.items():
-            if test_mod not in tested_modules and not any(
-                test_mod in Path(f).stem for f in source_symbols
-            ):
-                # Check if any source file partially matches
-                matches_source = any(test_mod.replace("_", "-") in f or test_mod.replace("_", "") in Path(f).stem
-                                     for f in source_symbols)
-                if not matches_source:
-                    rel = str(test_path.relative_to(root))
-                    report.gaps.append(Gap(
-                        gap_type=GapType.ORPHAN_TEST,
-                        severity=GapSeverity.WARNING,
-                        file=rel,
-                        line=None,
-                        name=test_mod,
-                        description=f"Test file {rel} exists but no matching source module found",
-                        suggestion=f"Verify if the source was renamed or removed",
-                    ))
-
-        return report

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/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()

tests/test_knowledge_gap_identifier.py

@@ -1,141 +0,0 @@
-"""Tests for knowledge_gap_identifier module."""
-
-import sys
-import os
-import tempfile
-import shutil
-from pathlib import Path
-
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'scripts'))
-
-from knowledge_gap_identifier import KnowledgeGapIdentifier, GapType, GapSeverity
-
-
-def _make_repo(tmpdir, structure):
-    """Create a test repo from a dict of {path: content}."""
-    for rel_path, content in structure.items():
-        p = Path(tmpdir) / rel_path
-        p.parent.mkdir(parents=True, exist_ok=True)
-        p.write_text(content)
-
-
-def test_undocumented_symbol():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        _make_repo(tmpdir, {
-            "src/calculator.py": "def add(a, b):\n    return a + b\n",
-            "README.md": "# Calculator\n",
-        })
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        undocumented = [g for g in report.gaps if g.gap_type == GapType.UNDOCUMENTED]
-        assert any(g.name == "add" for g in undocumented), "add should be undocumented"
-
-
-def test_documented_symbol_no_gap():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        _make_repo(tmpdir, {
-            "src/calculator.py": "def add(a, b):\n    return a + b\n",
-            "README.md": "# Calculator\nUse `add()` to add numbers.\n",
-        })
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        undocumented = [g for g in report.gaps
-                       if g.gap_type == GapType.UNDOCUMENTED and g.name == "add"]
-        assert len(undocumented) == 0, "add is documented, should not be flagged"
-
-
-def test_untested_module():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        _make_repo(tmpdir, {
-            "src/calculator.py": "def add(a, b):\n    return a + b\n",
-            "src/helper.py": "def format(x):\n    return str(x)\n",
-            "tests/test_calculator.py": "from src.calculator import add\nassert add(1,2) == 3\n",
-        })
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        untested = [g for g in report.gaps if g.gap_type == GapType.UNTESTED]
-        assert any("helper" in g.name for g in untested), "helper should be untested"
-
-
-def test_tested_module_no_gap():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        _make_repo(tmpdir, {
-            "src/calculator.py": "def add(a, b):\n    return a + b\n",
-            "tests/test_calculator.py": "def test_add():\n    assert True\n",
-        })
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        untested = [g for g in report.gaps
-                    if g.gap_type == GapType.UNTESTED and "calculator" in g.name]
-        assert len(untested) == 0, "calculator has tests, should not be flagged"
-
-
-def test_missing_implementation():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        _make_repo(tmpdir, {
-            "src/app.py": "def run():\n    pass\n",
-            "docs/api.md": "# API\nUse `NonExistentClass` to do things.\n",
-        })
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        missing = [g for g in report.gaps if g.gap_type == GapType.MISSING_IMPLEMENTATION]
-        assert any(g.name == "NonExistentClass" for g in missing)
-
-
-def test_private_symbols_skipped():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        _make_repo(tmpdir, {
-            "src/app.py": "def _internal():\n    pass\ndef public():\n    pass\n",
-            "README.md": "# App\n",
-        })
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        undocumented_names = [g.name for g in report.gaps if g.gap_type == GapType.UNDOCUMENTED]
-        assert "_internal" not in undocumented_names, "Private symbols should be skipped"
-        assert "public" in undocumented_names
-
-
-def test_empty_repo():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        assert len(report.gaps) == 0
-
-
-def test_invalid_path():
-    report = KnowledgeGapIdentifier().analyze("/nonexistent/path/xyz")
-    assert len(report.gaps) == 1
-    assert report.gaps[0].severity == GapSeverity.ERROR
-
-
-def test_report_summary():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        _make_repo(tmpdir, {
-            "src/app.py": "class MyService:\n    def handle(self):\n        pass\n",
-            "README.md": "# App\n",
-        })
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        summary = report.summary()
-        assert "UNDOCUMENTED" in summary
-        assert "MyService" in summary
-
-
-def test_report_to_dict():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        _make_repo(tmpdir, {
-            "src/app.py": "def hello():\n    pass\n",
-            "README.md": "# App\n",
-        })
-        report = KnowledgeGapIdentifier().analyze(tmpdir)
-        d = report.to_dict()
-        assert "total_gaps" in d
-        assert "gaps" in d
-        assert isinstance(d["gaps"], list)
-        assert d["total_gaps"] > 0
-
-
-if __name__ == "__main__":
-    test_undocumented_symbol()
-    test_documented_symbol_no_gap()
-    test_untested_module()
-    test_tested_module_no_gap()
-    test_missing_implementation()
-    test_private_symbols_skipped()
-    test_empty_repo()
-    test_invalid_path()
-    test_report_summary()
-    test_report_to_dict()
-    print("All 10 tests passed.")