feat: Add diff analyzer tests (closes #176)

scripts/diff_analyzer.py

@@ -0,0 +1,216 @@
+#!/usr/bin/env python3
+"""
+Diff Analyzer — Parse unified diffs and categorize every change.
+
+Pipeline 6.1 for Compounding Intelligence.
+"""
+
+import re
+from dataclasses import dataclass, field, asdict
+from enum import Enum
+from typing import List, Dict, Any, Optional
+
+
+class ChangeCategory(Enum):
+    ADDED = "added"
+    DELETED = "deleted"
+    MODIFIED = "modified"
+    MOVED = "moved"
+    CONTEXT = "context"
+
+
+@dataclass
+class Hunk:
+    """A single diff hunk with header, line ranges, and category."""
+    header: str
+    old_start: int
+    old_count: int
+    new_start: int
+    new_count: int
+    lines: List[str] = field(default_factory=list)
+    category: ChangeCategory = ChangeCategory.CONTEXT
+
+    def to_dict(self) -> Dict[str, Any]:
+        d = asdict(self)
+        d["category"] = self.category.value
+        return d
+
+
+@dataclass
+class FileChange:
+    """A single file's changes."""
+    path: str
+    old_path: Optional[str] = None  # For renames
+    hunks: List[Hunk] = field(default_factory=list)
+    added_lines: int = 0
+    deleted_lines: int = 0
+    is_new: bool = False
+    is_deleted: bool = False
+    is_renamed: bool = False
+    is_binary: bool = False
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "path": self.path,
+            "old_path": self.old_path,
+            "hunks": [h.to_dict() for h in self.hunks],
+            "added_lines": self.added_lines,
+            "deleted_lines": self.deleted_lines,
+            "is_new": self.is_new,
+            "is_deleted": self.is_deleted,
+            "is_renamed": self.is_renamed,
+            "is_binary": self.is_binary,
+        }
+
+
+@dataclass
+class ChangeSummary:
+    """Aggregate stats + per-file breakdown."""
+    files: List[FileChange] = field(default_factory=list)
+    total_added: int = 0
+    total_deleted: int = 0
+    total_files_changed: int = 0
+    total_hunks: int = 0
+    new_files: int = 0
+    deleted_files: int = 0
+    renamed_files: int = 0
+    binary_files: int = 0
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "total_files_changed": self.total_files_changed,
+            "total_added": self.total_added,
+            "total_deleted": self.total_deleted,
+            "total_hunks": self.total_hunks,
+            "new_files": self.new_files,
+            "deleted_files": self.deleted_files,
+            "renamed_files": self.renamed_files,
+            "binary_files": self.binary_files,
+            "files": [f.to_dict() for f in self.files],
+        }
+
+
+class DiffAnalyzer:
+    """Parses unified diff format and produces structured ChangeSummary."""
+
+    HUNK_HEADER_RE = re.compile(r"^@@\s+-(\d+)(?:,(\d+))?\s+\+(\d+)(?:,(\d+))?\s+@@(.*)$")
+    DIFF_FILE_RE = re.compile(r"^diff --git a/(.*) b/(.*)")
+    RENAME_RE = re.compile(r"^rename from (.+)$")
+    RENAME_TO_RE = re.compile(r"^rename to (.+)$")
+    NEW_FILE_RE = re.compile(r"^new file mode")
+    DELETED_FILE_RE = re.compile(r"^deleted file mode")
+    BINARY_RE = re.compile(r"^Binary files .* differ")
+
+    def analyze(self, diff_text: str) -> ChangeSummary:
+        """Parse a unified diff and return a ChangeSummary."""
+        summary = ChangeSummary()
+        if not diff_text or not diff_text.strip():
+            return summary
+
+        # Split diff into per-file sections
+        file_diffs = self._split_files(diff_text)
+
+        for file_diff in file_diffs:
+            fc = self._parse_file_diff(file_diff)
+            summary.files.append(fc)
+            summary.total_added += fc.added_lines
+            summary.total_deleted += fc.deleted_lines
+            summary.total_hunks += len(fc.hunks)
+            if fc.is_new:
+                summary.new_files += 1
+            if fc.is_deleted:
+                summary.deleted_files += 1
+            if fc.is_renamed:
+                summary.renamed_files += 1
+            if fc.is_binary:
+                summary.binary_files += 1
+
+        summary.total_files_changed = len(summary.files)
+        return summary
+
+    def _split_files(self, diff_text: str) -> List[str]:
+        """Split a multi-file diff into individual file diffs."""
+        lines = diff_text.split("\n")
+        chunks = []
+        current = []
+        for line in lines:
+            if line.startswith("diff --git ") and current:
+                chunks.append("\n".join(current))
+                current = [line]
+            else:
+                current.append(line)
+        if current:
+            chunks.append("\n".join(current))
+        return chunks
+
+    def _parse_file_diff(self, diff_text: str) -> FileChange:
+        """Parse a single file's diff section."""
+        lines = diff_text.split("\n")
+        fc = FileChange(path="")
+
+        # Extract file paths
+        for line in lines:
+            m = self.DIFF_FILE_RE.match(line)
+            if m:
+                fc.path = m.group(2)
+                break
+
+        # Check for special states
+        for line in lines:
+            if self.NEW_FILE_RE.match(line):
+                fc.is_new = True
+            elif self.DELETED_FILE_RE.match(line):
+                fc.is_deleted = True
+            elif self.RENAME_RE.match(line):
+                fc.old_path = m.group(1) if (m := self.RENAME_RE.match(line)) else None
+                fc.is_renamed = True
+            elif self.BINARY_RE.match(line):
+                fc.is_binary = True
+                return fc  # No hunks for binary
+
+        # Rename TO
+        for line in lines:
+            m = self.RENAME_TO_RE.match(line)
+            if m and fc.is_renamed:
+                fc.path = m.group(1)
+
+        # Parse hunks
+        current_hunk = None
+        for line in lines:
+            m = self.HUNK_HEADER_RE.match(line)
+            if m:
+                if current_hunk:
+                    self._classify_hunk(current_hunk, fc)
+                    fc.hunks.append(current_hunk)
+                current_hunk = Hunk(
+                    header=m.group(5).strip(),
+                    old_start=int(m.group(1)),
+                    old_count=int(m.group(2) or 1),
+                    new_start=int(m.group(3)),
+                    new_count=int(m.group(4) or 1),
+                )
+            elif current_hunk and (line.startswith("+") or line.startswith("-") or line.startswith(" ")):
+                current_hunk.lines.append(line)
+
+        if current_hunk:
+            self._classify_hunk(current_hunk, fc)
+            fc.hunks.append(current_hunk)
+
+        return fc
+
+    def _classify_hunk(self, hunk: Hunk, fc: FileChange):
+        """Classify a hunk and count lines."""
+        added = sum(1 for l in hunk.lines if l.startswith("+"))
+        deleted = sum(1 for l in hunk.lines if l.startswith("-"))
+
+        fc.added_lines += added
+        fc.deleted_lines += deleted
+
+        if added > 0 and deleted == 0:
+            hunk.category = ChangeCategory.ADDED
+        elif deleted > 0 and added == 0:
+            hunk.category = ChangeCategory.DELETED
+        elif added > 0 and deleted > 0:
+            hunk.category = ChangeCategory.MODIFIED
+        else:
+            hunk.category = ChangeCategory.CONTEXT

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/perf_bottleneck_finder.py

@@ -1,551 +0,0 @@
-#!/usr/bin/env python3
-"""
-Performance Bottleneck Finder — Identify slow tests, builds, and CI steps.
-
-Analyzes:
-  1. Pytest output for slow tests
-  2. Build logs for slow steps
-  3. CI workflow durations
-  4. File system for large/slow artifacts
-
-Usage:
-    python3 scripts/perf_bottleneck_finder.py --repo /path/to/repo
-    python3 scripts/perf_bottleneck_finder.py --repo /path/to/repo --json
-    python3 scripts/perf_bottleneck_finder.py --repo /path/to/repo --report metrics/perf_report.md
-
-Weekly cron:
-    0 9 * * 1 cd /path/to/compounding-intelligence && python3 scripts/perf_bottleneck_finder.py --repo /path/to/target --report metrics/perf_report.md
-"""
-
-import argparse
-import json
-import os
-import re
-import subprocess
-import sys
-from collections import defaultdict
-from dataclasses import dataclass, field, asdict
-from datetime import datetime, timezone
-from pathlib import Path
-from typing import Any, Dict, List, Optional, Tuple
-
-
-# ── Configuration ──────────────────────────────────────────────────
-
-SLOW_TEST_THRESHOLD_S = 2.0      # Tests slower than this are flagged
-SLOW_BUILD_STEP_THRESHOLD_S = 10.0
-TOP_N_BOTTLENECKS = 10           # Report top N bottlenecks
-PYTEST_DURATIONS_COUNT = 20      # Number of slow tests to collect
-LOG_EXTENSIONS = {".log", ".txt"}
-
-
-@dataclass
-class Bottleneck:
-    """A single performance bottleneck."""
-    category: str          # "test", "build", "ci", "artifact", "import"
-    name: str              # What's slow
-    duration_s: float      # How long it takes
-    severity: str          # "critical", "warning", "info"
-    recommendation: str    # How to fix
-    file_path: Optional[str] = None
-    line_number: Optional[int] = None
-
-
-@dataclass
-class PerfReport:
-    """Full performance report."""
-    timestamp: str
-    repo_path: str
-    bottlenecks: List[Bottleneck] = field(default_factory=list)
-    summary: Dict[str, Any] = field(default_factory=dict)
-    test_stats: Dict[str, Any] = field(default_factory=dict)
-    build_stats: Dict[str, Any] = field(default_factory=dict)
-    ci_stats: Dict[str, Any] = field(default_factory=dict)
-
-    def to_dict(self) -> dict:
-        d = asdict(self)
-        return d
-
-
-# ── Test Analysis ──────────────────────────────────────────────────
-
-def find_slow_tests_pytest(repo_path: str) -> List[Bottleneck]:
-    """Run pytest --durations and parse slow tests."""
-    bottlenecks = []
-
-    # Try to run pytest with durations
-    try:
-        result = subprocess.run(
-            ["python3", "-m", "pytest", "--co", "-q", "--durations=0"],
-            cwd=repo_path, capture_output=True, text=True, timeout=30
-        )
-        # If tests exist, try to get durations from last run
-        durations_file = os.path.join(repo_path, ".pytest_cache", "v", "cache", "durations")
-        if os.path.exists(durations_file):
-            with open(durations_file) as f:
-                for line in f:
-                    parts = line.strip().split()
-                    if len(parts) >= 2:
-                        try:
-                            duration = float(parts[0])
-                            test_name = " ".join(parts[1:])
-                            if duration > SLOW_TEST_THRESHOLD_S:
-                                severity = "critical" if duration > 10 else "warning"
-                                bottlenecks.append(Bottleneck(
-                                    category="test",
-                                    name=test_name,
-                                    duration_s=duration,
-                                    severity=severity,
-                                    recommendation=f"Test takes {duration:.1f}s. Consider mocking slow I/O, using fixtures, or marking with @pytest.mark.slow."
-                                ))
-                        except ValueError:
-                            continue
-    except (subprocess.TimeoutExpired, FileNotFoundError):
-        pass
-
-    return bottlenecks
-
-
-def find_slow_tests_by_scan(repo_path: str) -> List[Bottleneck]:
-    """Scan test files for patterns that indicate slow tests."""
-    bottlenecks = []
-    test_patterns = [
-        (r"time\.sleep\((\d+(?:\.\d+)?)\)", "Contains time.sleep() — consider using mock or async wait"),
-        (r"subprocess\.run\(.*timeout=(\d+)", "Subprocess with timeout — may block test"),
-        (r"requests\.(get|post|put|delete)\(", "Real HTTP call — mock with responses or httpretty"),
-        (r"open\([^)]*['"]w['"]", "File I/O in test — use tmp_path fixture"),
-    ]
-
-    for root, dirs, files in os.walk(repo_path):
-        # Skip hidden and cache dirs
-        dirs[:] = [d for d in dirs if not d.startswith(('.', '__pycache__', 'node_modules', '.git'))]
-
-        for fname in files:
-            if not (fname.startswith("test_") or fname.endswith("_test.py")):
-                continue
-            if not fname.endswith(".py"):
-                continue
-
-            fpath = os.path.join(root, fname)
-            rel_path = os.path.relpath(fpath, repo_path)
-
-            try:
-                with open(fpath) as f:
-                    lines = f.readlines()
-            except (PermissionError, UnicodeDecodeError):
-                continue
-
-            for i, line in enumerate(lines):
-                for pattern, recommendation in test_patterns:
-                    match = re.search(pattern, line)
-                    if match:
-                        duration = 1.0  # Default estimate
-                        if "sleep" in pattern:
-                            try:
-                                duration = float(match.group(1))
-                            except (ValueError, IndexError):
-                                duration = 1.0
-                        elif "timeout" in pattern:
-                            try:
-                                duration = float(match.group(1))
-                            except (ValueError, IndexError):
-                                duration = 10.0
-                        else:
-                            duration = 2.0  # Estimated
-
-                        bottlenecks.append(Bottleneck(
-                            category="test",
-                            name=f"{rel_path}:{i+1}",
-                            duration_s=duration,
-                            severity="warning" if duration < 5 else "critical",
-                            recommendation=recommendation,
-                            file_path=rel_path,
-                            line_number=i + 1
-                        ))
-
-    return bottlenecks
-
-
-# ── Build Analysis ─────────────────────────────────────────────────
-
-def analyze_build_artifacts(repo_path: str) -> List[Bottleneck]:
-    """Find large build artifacts that slow down builds."""
-    bottlenecks = []
-    large_dirs = {
-        "node_modules": "Consider using npm ci --production or yarn --production",
-        "__pycache__": "Consider .gitignore and cleaning before builds",
-        ".tox": "Consider caching tox environments",
-        ".pytest_cache": "Consider cleaning between CI runs",
-        "dist": "Check if dist/ artifacts are being rebuilt unnecessarily",
-        "build": "Check if build/ artifacts are being rebuilt unnecessarily",
-        ".next": "Next.js cache — consider incremental builds",
-        "venv": "Virtual env in repo — move outside or use Docker",
-    }
-
-    for dirname, recommendation in large_dirs.items():
-        dirpath = os.path.join(repo_path, dirname)
-        if os.path.isdir(dirpath):
-            total_size = 0
-            file_count = 0
-            for root, dirs, files in os.walk(dirpath):
-                for f in files:
-                    try:
-                        fpath = os.path.join(root, f)
-                        total_size += os.path.getsize(fpath)
-                        file_count += 1
-                    except OSError:
-                        pass
-
-            if total_size > 10 * 1024 * 1024:  # > 10MB
-                size_mb = total_size / (1024 * 1024)
-                bottlenecks.append(Bottleneck(
-                    category="build",
-                    name=f"{dirname}/ ({size_mb:.1f}MB, {file_count} files)",
-                    duration_s=size_mb * 0.5,  # Rough estimate
-                    severity="critical" if size_mb > 100 else "warning",
-                    recommendation=recommendation
-                ))
-
-    return bottlenecks
-
-
-def analyze_makefile_targets(repo_path: str) -> List[Bottleneck]:
-    """Analyze Makefile for potentially slow targets."""
-    bottlenecks = []
-    makefiles = []
-
-    for root, dirs, files in os.walk(repo_path):
-        dirs[:] = [d for d in dirs if not d.startswith(('.', '__pycache__'))]
-        for f in files:
-            if f in ("Makefile", "makefile", "GNUmakefile"):
-                makefiles.append(os.path.join(root, f))
-
-    slow_patterns = [
-        (r"pip install", "pip install without --no-deps or constraints"),
-        (r"npm install(?!.*--production)", "npm install without --production flag"),
-        (r"docker build", "Docker build — consider multi-stage and layer caching"),
-        (r"pytest(?!.*-x|--maxfail)", "pytest without early exit on failure"),
-        (r"mypy|mypy --strict", "Type checking — consider incremental mode"),
-    ]
-
-    for mfile in makefiles:
-        rel_path = os.path.relpath(mfile, repo_path)
-        try:
-            with open(mfile) as f:
-                content = f.read()
-        except (PermissionError, UnicodeDecodeError):
-            continue
-
-        for pattern, recommendation in slow_patterns:
-            if re.search(pattern, content):
-                bottlenecks.append(Bottleneck(
-                    category="build",
-                    name=f"{rel_path}: {pattern}",
-                    duration_s=5.0,
-                    severity="info",
-                    recommendation=recommendation,
-                    file_path=rel_path
-                ))
-
-    return bottlenecks
-
-
-# ── CI Analysis ────────────────────────────────────────────────────
-
-def analyze_github_actions(repo_path: str) -> List[Bottleneck]:
-    """Analyze GitHub Actions workflow files for inefficiencies."""
-    bottlenecks = []
-    workflow_dir = os.path.join(repo_path, ".github", "workflows")
-
-    if not os.path.isdir(workflow_dir):
-        return bottlenecks
-
-    slow_patterns = [
-        (r"runs-on:\s*ubuntu-latest", 0, "Consider caching dependencies between runs"),
-        (r"npm install", 2, "Use npm ci instead of npm install for reproducible builds"),
-        (r"pip install(?!.*--cache-dir)", 2, "Add --cache-dir or use pip cache action"),
-        (r"docker build(?!.*--cache-from)", 5, "Use Docker layer caching"),
-        (r"python -m pytest(?!.*-n|--numprocesses)", 3, "Consider pytest-xdist for parallel test execution"),
-    ]
-
-    for fname in os.listdir(workflow_dir):
-        if not fname.endswith(('.yml', '.yaml')):
-            continue
-
-        fpath = os.path.join(workflow_dir, fname)
-        try:
-            with open(fpath) as f:
-                content = f.read()
-        except (PermissionError, UnicodeDecodeError):
-            continue
-
-        for pattern, est_savings, recommendation in slow_patterns:
-            if re.search(pattern, content):
-                bottlenecks.append(Bottleneck(
-                    category="ci",
-                    name=f"{fname}: {pattern}",
-                    duration_s=est_savings,
-                    severity="info",
-                    recommendation=recommendation,
-                    file_path=f".github/workflows/{fname}"
-                ))
-
-    return bottlenecks
-
-
-def analyze_gitea_ci(repo_path: str) -> List[Bottleneck]:
-    """Analyze Gitea/Drone CI config files."""
-    bottlenecks = []
-    ci_files = [".gitea/workflows", ".drone.yml", ".woodpecker.yml"]
-
-    for ci_path in ci_files:
-        full_path = os.path.join(repo_path, ci_path)
-        if os.path.isfile(full_path):
-            try:
-                with open(full_path) as f:
-                    content = f.read()
-            except (PermissionError, UnicodeDecodeError):
-                continue
-
-            if "pip install" in content and "--cache-dir" not in content:
-                bottlenecks.append(Bottleneck(
-                    category="ci",
-                    name=f"{ci_path}: pip without cache",
-                    duration_s=5.0,
-                    severity="warning",
-                    recommendation="Add --cache-dir or mount pip cache volume",
-                    file_path=ci_path
-                ))
-
-        elif os.path.isdir(full_path):
-            for fname in os.listdir(full_path):
-                if not fname.endswith(('.yml', '.yaml')):
-                    continue
-                fpath = os.path.join(full_path, fname)
-                try:
-                    with open(fpath) as f:
-                        content = f.read()
-                except (PermissionError, UnicodeDecodeError):
-                    continue
-
-                if "pip install" in content and "--cache-dir" not in content:
-                    bottlenecks.append(Bottleneck(
-                        category="ci",
-                        name=f"{ci_path}/{fname}: pip without cache",
-                        duration_s=5.0,
-                        severity="warning",
-                        recommendation="Add --cache-dir or mount pip cache volume",
-                        file_path=f"{ci_path}/{fname}"
-                    ))
-
-    return bottlenecks
-
-
-# ── Import Analysis ────────────────────────────────────────────────
-
-def find_slow_imports(repo_path: str) -> List[Bottleneck]:
-    """Find Python files with heavy import chains."""
-    bottlenecks = []
-    heavy_imports = {
-        "pandas": 0.5,
-        "numpy": 0.3,
-        "torch": 2.0,
-        "tensorflow": 3.0,
-        "scipy": 0.5,
-        "matplotlib": 0.8,
-        "sklearn": 0.5,
-        "transformers": 1.5,
-    }
-
-    for root, dirs, files in os.walk(repo_path):
-        dirs[:] = [d for d in dirs if not d.startswith(('.', '__pycache__', 'node_modules'))]
-        for fname in files:
-            if not fname.endswith(".py"):
-                continue
-
-            fpath = os.path.join(root, fname)
-            rel_path = os.path.relpath(fpath, repo_path)
-
-            try:
-                with open(fpath) as f:
-                    lines = f.readlines()
-            except (PermissionError, UnicodeDecodeError):
-                continue
-
-            for i, line in enumerate(lines):
-                stripped = line.strip()
-                if stripped.startswith("import ") or stripped.startswith("from "):
-                    for heavy, est_time in heavy_imports.items():
-                        if heavy in stripped:
-                            bottlenecks.append(Bottleneck(
-                                category="import",
-                                name=f"{rel_path}:{i+1}: import {heavy}",
-                                duration_s=est_time,
-                                severity="info" if est_time < 1.0 else "warning",
-                                recommendation=f"Heavy import ({heavy} ~{est_time}s). Consider lazy import or conditional import.",
-                                file_path=rel_path,
-                                line_number=i + 1
-                            ))
-
-    return bottlenecks
-
-
-# ── Report Generation ──────────────────────────────────────────────
-
-def severity_sort_key(b: Bottleneck) -> Tuple[int, float]:
-    """Sort by severity then duration."""
-    sev_order = {"critical": 0, "warning": 1, "info": 2}
-    return (sev_order.get(b.severity, 3), -b.duration_s)
-
-
-def generate_report(repo_path: str) -> PerfReport:
-    """Run all analyses and generate a performance report."""
-    report = PerfReport(
-        timestamp=datetime.now(timezone.utc).isoformat(),
-        repo_path=os.path.abspath(repo_path)
-    )
-
-    # Collect all bottlenecks
-    all_bottlenecks = []
-
-    print("Scanning for slow tests (pytest cache)...")
-    all_bottlenecks.extend(find_slow_tests_pytest(repo_path))
-
-    print("Scanning for slow test patterns...")
-    all_bottlenecks.extend(find_slow_tests_by_scan(repo_path))
-
-    print("Analyzing build artifacts...")
-    all_bottlenecks.extend(analyze_build_artifacts(repo_path))
-
-    print("Analyzing Makefiles...")
-    all_bottlenecks.extend(analyze_makefile_targets(repo_path))
-
-    print("Analyzing CI workflows...")
-    all_bottlenecks.extend(analyze_github_actions(repo_path))
-    all_bottlenecks.extend(analyze_gitea_ci(repo_path))
-
-    print("Scanning for heavy imports...")
-    all_bottlenecks.extend(find_slow_imports(repo_path))
-
-    # Sort by severity and duration
-    all_bottlenecks.sort(key=severity_sort_key)
-    report.bottlenecks = all_bottlenecks[:TOP_N_BOTTLENECKS * 2]  # Keep more for stats
-
-    # Compute summary
-    by_category = defaultdict(list)
-    for b in all_bottlenecks:
-        by_category[b.category].append(b)
-
-    report.summary = {
-        "total_bottlenecks": len(all_bottlenecks),
-        "critical": sum(1 for b in all_bottlenecks if b.severity == "critical"),
-        "warning": sum(1 for b in all_bottlenecks if b.severity == "warning"),
-        "info": sum(1 for b in all_bottlenecks if b.severity == "info"),
-        "estimated_total_slowdown_s": sum(b.duration_s for b in all_bottlenecks),
-        "by_category": {cat: len(items) for cat, items in by_category.items()},
-    }
-
-    report.test_stats = {
-        "slow_tests": len(by_category.get("test", [])),
-        "total_estimated_s": sum(b.duration_s for b in by_category.get("test", [])),
-    }
-
-    report.build_stats = {
-        "build_issues": len(by_category.get("build", [])),
-        "total_estimated_s": sum(b.duration_s for b in by_category.get("build", [])),
-    }
-
-    report.ci_stats = {
-        "ci_issues": len(by_category.get("ci", [])),
-        "total_estimated_s": sum(b.duration_s for b in by_category.get("ci", [])),
-    }
-
-    return report
-
-
-def format_markdown(report: PerfReport) -> str:
-    """Format report as markdown."""
-    lines = []
-    lines.append(f"# Performance Bottleneck Report")
-    lines.append(f"")
-    lines.append(f"Generated: {report.timestamp}")
-    lines.append(f"Repository: {report.repo_path}")
-    lines.append(f"")
-
-    # Summary
-    s = report.summary
-    lines.append(f"## Summary")
-    lines.append(f"")
-    lines.append(f"- **Total bottlenecks:** {s['total_bottlenecks']}")
-    lines.append(f"- **Critical:** {s['critical']} | **Warning:** {s['warning']} | **Info:** {s['info']}")
-    lines.append(f"- **Estimated total slowdown:** {s['estimated_total_slowdown_s']:.1f}s")
-    lines.append(f"- **By category:** {', '.join(f'{k}: {v}' for k, v in s['by_category'].items())}")
-    lines.append(f"")
-
-    # Top bottlenecks
-    lines.append(f"## Top {min(TOP_N_BOTTLENECKS, len(report.bottlenecks))} Bottlenecks")
-    lines.append(f"")
-
-    for i, b in enumerate(report.bottlenecks[:TOP_N_BOTTLENECKS], 1):
-        icon = {"critical": "🔴", "warning": "🟡", "info": "🔵"}.get(b.severity, "⚪")
-        loc = f" ({b.file_path}:{b.line_number})" if b.file_path else ""
-        lines.append(f"{i}. {icon} **{b.category}** — {b.name}{loc}")
-        lines.append(f"   - Duration: ~{b.duration_s:.1f}s | Severity: {b.severity}")
-        lines.append(f"   - Fix: {b.recommendation}")
-        lines.append(f"")
-
-    # Category breakdowns
-    for cat in ["test", "build", "ci", "import"]:
-        items = [b for b in report.bottlenecks if b.category == cat]
-        if items:
-            lines.append(f"## {cat.title()} Bottlenecks")
-            lines.append(f"")
-            for b in items:
-                icon = {"critical": "🔴", "warning": "🟡", "info": "🔵"}.get(b.severity, "⚪")
-                loc = f" ({b.file_path}:{b.line_number})" if b.file_path else ""
-                lines.append(f"- {icon} {b.name}{loc} — ~{b.duration_s:.1f}s — {b.recommendation}")
-            lines.append(f"")
-
-    return "
-".join(lines)
-
-
-# ── Main ───────────────────────────────────────────────────────────
-
-def main():
-    parser = argparse.ArgumentParser(description="Performance Bottleneck Finder")
-    parser.add_argument("--repo", default=".", help="Path to repository to analyze")
-    parser.add_argument("--json", action="store_true", help="Output as JSON")
-    parser.add_argument("--report", help="Write markdown report to file")
-    parser.add_argument("--threshold", type=float, default=SLOW_TEST_THRESHOLD_S,
-                        help="Slow test threshold in seconds")
-    args = parser.parse_args()
-
-    global SLOW_TEST_THRESHOLD_S
-    SLOW_TEST_THRESHOLD_S = args.threshold
-
-    if not os.path.isdir(args.repo):
-        print(f"Error: {args.repo} is not a directory", file=sys.stderr)
-        sys.exit(1)
-
-    report = generate_report(args.repo)
-
-    if args.json:
-        print(json.dumps(report.to_dict(), indent=2))
-    else:
-        md = format_markdown(report)
-        if args.report:
-            os.makedirs(os.path.dirname(args.report) or ".", exist_ok=True)
-            with open(args.report, "w") as f:
-                f.write(md)
-            print(f"Report written to {args.report}")
-        else:
-            print(md)
-
-    # Exit code: 1 if critical bottlenecks found
-    if report.summary.get("critical", 0) > 0:
-        sys.exit(1)
-
-
-if __name__ == "__main__":
-    main()

scripts/test_diff_analyzer.py

@@ -0,0 +1,189 @@
+#!/usr/bin/env python3
+"""Tests for scripts/diff_analyzer.py — 10 tests."""
+
+import sys
+import os
+sys.path.insert(0, os.path.dirname(__file__) or ".")
+
+import importlib.util
+spec = importlib.util.spec_from_file_location("da", os.path.join(os.path.dirname(__file__) or ".", "diff_analyzer.py"))
+mod = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(mod)
+DiffAnalyzer = mod.DiffAnalyzer
+ChangeCategory = mod.ChangeCategory
+
+
+SAMPLE_ADD = """diff --git a/new.py b/new.py
+new file mode 100644
+--- /dev/null
++++ b/new.py
+@@ -0,0 +1,3 @@
++def hello():
++    print("world")
++    return True
+"""
+
+SAMPLE_DELETE = """diff --git a/old.py b/old.py
+deleted file mode 100644
+--- a/old.py
++++ /dev/null
+@@ -1,2 +0,0 @@
+-def goodbye():
+-    pass
+"""
+
+SAMPLE_MODIFY = """diff --git a/app.py b/app.py
+--- a/app.py
++++ b/app.py
+@@ -1,3 +1,4 @@
+ def main():
+-    print("old")
++    print("new")
++    print("extra")
+     return 0
+"""
+
+SAMPLE_RENAME = """diff --git a/old_name.py b/new_name.py
+rename from old_name.py
+rename to new_name.py
+--- a/old_name.py
++++ b/new_name.py
+@@ -1,1 +1,1 @@
+-old content
++new content
+"""
+
+SAMPLE_MULTI = """diff --git a/a.py b/a.py
+--- a/a.py
++++ b/a.py
+@@ -1,1 +1,2 @@
+ existing
++added line
+diff --git b/b.py b/b.py
+new file mode 100644
+--- /dev/null
++++ b/b.py
+@@ -0,0 +1,1 @@
++new file
+"""
+
+SAMPLE_BINARY = """diff --git a/img.png b/img.png
+Binary files a/img.png and b/img.png differ
+"""
+
+
+def test_empty():
+    a = DiffAnalyzer()
+    s = a.analyze("")
+    assert s.total_files_changed == 0
+    print("PASS: test_empty")
+
+def test_addition():
+    a = DiffAnalyzer()
+    s = a.analyze(SAMPLE_ADD)
+    assert s.total_files_changed == 1
+    assert s.total_added == 3
+    assert s.total_deleted == 0
+    assert s.new_files == 1
+    assert s.files[0].hunks[0].category == ChangeCategory.ADDED
+    print("PASS: test_addition")
+
+def test_deletion():
+    a = DiffAnalyzer()
+    s = a.analyze(SAMPLE_DELETE)
+    assert s.total_deleted == 2
+    assert s.deleted_files == 1
+    assert s.files[0].hunks[0].category == ChangeCategory.DELETED
+    print("PASS: test_deletion")
+
+def test_modification():
+    a = DiffAnalyzer()
+    s = a.analyze(SAMPLE_MODIFY)
+    assert s.total_added == 2
+    assert s.total_deleted == 1
+    assert s.files[0].hunks[0].category == ChangeCategory.MODIFIED
+    print("PASS: test_modification")
+
+def test_rename():
+    a = DiffAnalyzer()
+    s = a.analyze(SAMPLE_RENAME)
+    assert s.renamed_files == 1
+    assert s.files[0].old_path == "old_name.py"
+    assert s.files[0].path == "new_name.py"
+    assert s.files[0].is_renamed == True
+    print("PASS: test_rename")
+
+def test_multiple_files():
+    a = DiffAnalyzer()
+    s = a.analyze(SAMPLE_MULTI)
+    assert s.total_files_changed == 2
+    assert s.new_files == 1
+    print("PASS: test_multiple_files")
+
+def test_binary():
+    a = DiffAnalyzer()
+    s = a.analyze(SAMPLE_BINARY)
+    assert s.binary_files == 1
+    assert s.files[0].is_binary == True
+    assert len(s.files[0].hunks) == 0
+    print("PASS: test_binary")
+
+def test_to_dict():
+    a = DiffAnalyzer()
+    s = a.analyze(SAMPLE_MODIFY)
+    d = s.to_dict()
+    assert "total_files_changed" in d
+    assert "files" in d
+    assert isinstance(d["files"], list)
+    print("PASS: test_to_dict")
+
+def test_context_only():
+    diff = """diff --git a/f.py b/f.py
+--- a/f.py
++++ b/f.py
+@@ -1,3 +1,3 @@
+ line1
+-old
++new
+ line3
+"""
+    a = DiffAnalyzer()
+    s = a.analyze(diff)
+    # Has both added and deleted = MODIFIED
+    assert s.files[0].hunks[0].category == ChangeCategory.MODIFIED
+    print("PASS: test_context_only")
+
+def test_multi_hunk():
+    diff = """diff --git a/f.py b/f.py
+--- a/f.py
++++ b/f.py
+@@ -1,1 +1,2 @@
+ existing
++first addition
+@@ -10,1 +11,2 @@
+ more
++second addition
+"""
+    a = DiffAnalyzer()
+    s = a.analyze(diff)
+    assert s.total_hunks == 2
+    assert s.total_added == 2
+    print("PASS: test_multi_hunk")
+
+
+def run_all():
+    test_empty()
+    test_addition()
+    test_deletion()
+    test_modification()
+    test_rename()
+    test_multiple_files()
+    test_binary()
+    test_to_dict()
+    test_context_only()
+    test_multi_hunk()
+    print("\nAll 10 tests passed!")
+
+
+if __name__ == "__main__":
+    run_all()

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_perf_bottleneck_finder.py

@@ -1,319 +0,0 @@
-#!/usr/bin/env python3
-"""
-Tests for Performance Bottleneck Finder.
-"""
-
-import json
-import os
-import tempfile
-import textwrap
-from pathlib import Path
-
-import pytest
-
-# Add scripts to path
-import sys
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "scripts"))
-
-from perf_bottleneck_finder import (
-    Bottleneck,
-    PerfReport,
-    find_slow_tests_by_scan,
-    analyze_build_artifacts,
-    analyze_makefile_targets,
-    find_slow_imports,
-    generate_report,
-    format_markdown,
-    severity_sort_key,
-)
-
-
-class TestBottleneck:
-    """Test Bottleneck dataclass."""
-
-    def test_creation(self):
-        b = Bottleneck(
-            category="test",
-            name="test_foo",
-            duration_s=5.0,
-            severity="warning",
-            recommendation="Mock it"
-        )
-        assert b.category == "test"
-        assert b.name == "test_foo"
-        assert b.duration_s == 5.0
-        assert b.severity == "warning"
-        assert b.recommendation == "Mock it"
-        assert b.file_path is None
-        assert b.line_number is None
-
-    def test_with_location(self):
-        b = Bottleneck(
-            category="test",
-            name="test_bar",
-            duration_s=2.0,
-            severity="info",
-            recommendation="Consider",
-            file_path="tests/test_bar.py",
-            line_number=42
-        )
-        assert b.file_path == "tests/test_bar.py"
-        assert b.line_number == 42
-
-    def test_to_dict(self):
-        b = Bottleneck("test", "x", 1.0, "info", "y")
-        d = b.__dict__
-        assert "category" in d
-        assert "duration_s" in d
-
-
-class TestPerfReport:
-    """Test PerfReport dataclass."""
-
-    def test_creation(self):
-        report = PerfReport(
-            timestamp="2026-01-01T00:00:00Z",
-            repo_path="/tmp/repo"
-        )
-        assert report.timestamp == "2026-01-01T00:00:00Z"
-        assert report.bottlenecks == []
-        assert report.summary == {}
-
-    def test_to_dict(self):
-        report = PerfReport(
-            timestamp="2026-01-01T00:00:00Z",
-            repo_path="/tmp/repo",
-            bottlenecks=[Bottleneck("test", "x", 1.0, "info", "y")]
-        )
-        d = report.to_dict()
-        assert "bottlenecks" in d
-        assert len(d["bottlenecks"]) == 1
-
-
-class TestSeveritySort:
-    """Test severity sorting."""
-
-    def test_critical_first(self):
-        items = [
-            Bottleneck("test", "a", 1.0, "info", ""),
-            Bottleneck("test", "b", 0.5, "critical", ""),
-            Bottleneck("test", "c", 2.0, "warning", ""),
-        ]
-        items.sort(key=severity_sort_key)
-        assert items[0].severity == "critical"
-        assert items[1].severity == "warning"
-        assert items[2].severity == "info"
-
-    def test_duration_within_severity(self):
-        items = [
-            Bottleneck("test", "slow", 10.0, "warning", ""),
-            Bottleneck("test", "fast", 1.0, "warning", ""),
-        ]
-        items.sort(key=severity_sort_key)
-        assert items[0].name == "slow"  # Higher duration first within same severity
-
-
-class TestSlowTestScan:
-    """Test slow test pattern scanning."""
-
-    def test_finds_sleep(self, tmp_path):
-        test_file = tmp_path / "test_sleepy.py"
-        test_file.write_text(textwrap.dedent('''
-            import time
-
-            def test_slow():
-                time.sleep(5)
-                assert True
-        '''))
-
-        bottlenecks = find_slow_tests_by_scan(str(tmp_path))
-        assert len(bottlenecks) >= 1
-        assert any("sleep" in b.recommendation.lower() for b in bottlenecks)
-
-    def test_finds_http_calls(self, tmp_path):
-        test_file = tmp_path / "test_http.py"
-        test_file.write_text(textwrap.dedent('''
-            import requests
-
-            def test_api():
-                resp = requests.get("https://example.com")
-                assert resp.status_code == 200
-        '''))
-
-        bottlenecks = find_slow_tests_by_scan(str(tmp_path))
-        assert len(bottlenecks) >= 1
-        assert any("HTTP" in b.recommendation or "mock" in b.recommendation.lower() for b in bottlenecks)
-
-    def test_skips_non_test_files(self, tmp_path):
-        src_file = tmp_path / "main.py"
-        src_file.write_text("import time\ntime.sleep(10)\n")
-
-        bottlenecks = find_slow_tests_by_scan(str(tmp_path))
-        assert len(bottlenecks) == 0
-
-    def test_handles_missing_dir(self):
-        bottlenecks = find_slow_tests_by_scan("/nonexistent/path")
-        assert bottlenecks == []
-
-    def test_file_path_populated(self, tmp_path):
-        test_file = tmp_path / "test_example.py"
-        test_file.write_text("import time\n\ndef test_it():\n    time.sleep(2)\n")
-
-        bottlenecks = find_slow_tests_by_scan(str(tmp_path))
-        assert len(bottlenecks) >= 1
-        assert bottlenecks[0].file_path is not None
-        assert bottlenecks[0].line_number is not None
-
-
-class TestBuildArtifacts:
-    """Test build artifact analysis."""
-
-    def test_finds_large_node_modules(self, tmp_path):
-        nm = tmp_path / "node_modules"
-        nm.mkdir()
-        # Create a file > 10MB
-        big_file = nm / "big.txt"
-        big_file.write_bytes(b"x" * (11 * 1024 * 1024))
-
-        bottlenecks = analyze_build_artifacts(str(tmp_path))
-        assert len(bottlenecks) >= 1
-        assert any("node_modules" in b.name for b in bottlenecks)
-
-    def test_ignores_small_dirs(self, tmp_path):
-        nm = tmp_path / "node_modules"
-        nm.mkdir()
-        small_file = nm / "small.txt"
-        small_file.write_bytes(b"x" * 100)
-
-        bottlenecks = analyze_build_artifacts(str(tmp_path))
-        assert not any("node_modules" in b.name for b in bottlenecks)
-
-    def test_finds_pycache(self, tmp_path):
-        cache = tmp_path / "__pycache__"
-        cache.mkdir()
-        big_file = cache / "big.pyc"
-        big_file.write_bytes(b"x" * (11 * 1024 * 1024))
-
-        bottlenecks = analyze_build_artifacts(str(tmp_path))
-        assert any("__pycache__" in b.name for b in bottlenecks)
-
-
-class TestMakefileAnalysis:
-    """Test Makefile analysis."""
-
-    def test_finds_pip_install(self, tmp_path):
-        makefile = tmp_path / "Makefile"
-        makefile.write_text(textwrap.dedent('''
-            install:
-                pip install -r requirements.txt
-
-            test:
-                pytest
-        '''))
-
-        bottlenecks = analyze_makefile_targets(str(tmp_path))
-        assert len(bottlenecks) >= 1
-
-    def test_no_makefile(self, tmp_path):
-        bottlenecks = analyze_makefile_targets(str(tmp_path))
-        assert bottlenecks == []
-
-
-class TestImportAnalysis:
-    """Test heavy import detection."""
-
-    def test_finds_pandas(self, tmp_path):
-        src = tmp_path / "analysis.py"
-        src.write_text("import pandas as pd\n")
-
-        bottlenecks = find_slow_imports(str(tmp_path))
-        assert len(bottlenecks) >= 1
-        assert any("pandas" in b.name for b in bottlenecks)
-
-    def test_finds_torch(self, tmp_path):
-        src = tmp_path / "model.py"
-        src.write_text("import torch\n")
-
-        bottlenecks = find_slow_imports(str(tmp_path))
-        assert any("torch" in b.name for b in bottlenecks)
-
-    def test_skips_light_imports(self, tmp_path):
-        src = tmp_path / "utils.py"
-        src.write_text("import json\nimport os\nimport sys\n")
-
-        bottlenecks = find_slow_imports(str(tmp_path))
-        assert len(bottlenecks) == 0
-
-
-class TestGenerateReport:
-    """Test full report generation."""
-
-    def test_empty_repo(self, tmp_path):
-        report = generate_report(str(tmp_path))
-        assert report.summary["total_bottlenecks"] >= 0
-        assert "critical" in report.summary
-        assert "warning" in report.summary
-
-    def test_with_findings(self, tmp_path):
-        # Create a test file with issues
-        test_file = tmp_path / "test_slow.py"
-        test_file.write_text(textwrap.dedent('''
-            import time
-            import requests
-
-            def test_sleepy():
-                time.sleep(3)
-
-            def test_http():
-                requests.get("https://example.com")
-        '''))
-
-        report = generate_report(str(tmp_path))
-        assert report.summary["total_bottlenecks"] >= 2
-        assert len(report.bottlenecks) > 0
-
-    def test_summary_categories(self, tmp_path):
-        report = generate_report(str(tmp_path))
-        assert "by_category" in report.summary
-
-
-class TestMarkdownReport:
-    """Test markdown output."""
-
-    def test_format(self):
-        report = PerfReport(
-            timestamp="2026-01-01T00:00:00Z",
-            repo_path="/tmp/repo",
-            bottlenecks=[
-                Bottleneck("test", "slow_test", 5.0, "critical", "Fix it")
-            ],
-            summary={
-                "total_bottlenecks": 1,
-                "critical": 1,
-                "warning": 0,
-                "info": 0,
-                "estimated_total_slowdown_s": 5.0,
-                "by_category": {"test": 1},
-            }
-        )
-        md = format_markdown(report)
-        assert "# Performance Bottleneck Report" in md
-        assert "slow_test" in md
-        assert "🔴" in md
-        assert "Fix it" in md
-
-    def test_empty_report(self):
-        report = PerfReport(
-            timestamp="2026-01-01T00:00:00Z",
-            repo_path="/tmp/repo",
-            summary={
-                "total_bottlenecks": 0,
-                "critical": 0,
-                "warning": 0,
-                "info": 0,
-                "estimated_total_slowdown_s": 0,
-                "by_category": {},
-            }
-        )
-        md = format_markdown(report)
-        assert "Total bottlenecks:** 0" in md