feat(scripts): add --summary and --by-size modes to exception_handling audit

scripts/audit_exception_handling.py

@@ -43,11 +43,21 @@ the fix could look like (e.g., "return Result(data=NIL_T, errors=[...])").
 
 Usage:
   uv run python scripts/audit_exception_handling.py                 # human report
-  uv run python python scripts/audit_exception_handling.py --json  # JSON output
+  uv run python scripts/audit_exception_handling.py --json          # JSON output
-  uv run python python scripts/audit_exception_handling.py --src src
+  uv run python scripts/audit_exception_handling.py --src src      # source dir
-  uv run python python scripts/audit_exception_handling.py --top 20
+  uv run python scripts/audit_exception_handling.py --top 20       # top N files
-  uv run python python scripts/audit_exception_handling.py --verbose
+  uv run python scripts/audit_exception_handling.py --verbose       # every site
-  uv run python python scripts/audit_exception_handling.py --strict
+  uv run python scripts/audit_exception_handling.py --strict        # exit 1 on violation
+  uv run python scripts/audit_exception_handling.py --summary      # per-file summary table
+  uv run python scripts/audit_exception_handling.py --by-size       # group by migration effort
+
+Output modes (mutually exclusive; --json / --summary / --by-size override
+the default human-readable report):
+  --summary: per-file table sorted by V+S descending. Use this for
+    "which files have the most violations" planning questions.
+  --by-size: groups files into small/medium/large/baseline buckets.
+    Use this for "how many migration tracks do I need" planning.
+  (default): top-N files with per-site breakdown and 1-line hints.
 
 Exit codes:
   0 - audit ran (informational mode; findings don't fail the script)
@@ -734,6 +744,90 @@ def render_json(reports: list[FileReport], files_scanned: int, top: int, verbose
  return json.dumps(output, indent=2)
 
 
+def render_summary(reports: list[FileReport], files_scanned: int) -> str:
+ """Per-file summary table. Used for planning migration tracks.
+
+ Columns: file, total, V (violations), S (suspicious), ? (unclear), C (compliant).
+ Sorted by V+S descending so the highest-impact files are at the top.
+ """
+ lines: list[str] = []
+ lines.append("=== Exception Handling Audit: Per-File Summary ===\n")
+ lines.append(f"Files scanned: {files_scanned}")
+ lines.append(f"Files with findings: {len(reports)}\n")
+ lines.append(f"{'file':<38} {'total':>6} {'V':>5} {'S':>5} {'?':>4} {'C':>5}  baseline?")
+ lines.append("-" * 90)
+ for f in sorted(reports, key=lambda r: -(r.violation_count + r.suspicious_count)):
+  total = f.violation_count + f.suspicious_count + f.unclear_count + f.compliant_count
+  if total == 0:
+   continue
+  name = f.filename.replace("src/", "").replace("\\", "/")
+  base = "*BASELINE*" if f.is_refactored_baseline else ""
+  lines.append(f"{name:<38} {total:>6} {f.violation_count:>5} {f.suspicious_count:>5} {f.unclear_count:>4} {f.compliant_count:>5}  {base}")
+ lines.append("-" * 90)
+ total_v = sum(r.violation_count for r in reports)
+ total_s = sum(r.suspicious_count for r in reports)
+ total_u = sum(r.unclear_count for r in reports)
+ total_c = sum(r.compliant_count for r in reports)
+ lines.append(f"{'TOTAL':<38} {total_v + total_s + total_u + total_c:>6} {total_v:>5} {total_s:>5} {total_u:>4} {total_c:>5}")
+ return "\n".join(lines) + "\n"
+
+
+def render_by_size(reports: list[FileReport], files_scanned: int) -> str:
+ """Group files by violation+suspicious count bucket for migration planning.
+
+ Buckets: small (<=5), medium (6-15), large (>=16). Plus the 3 refactored
+ baseline files as a separate bucket (the convention reference; remaining
+ gaps should be closed to make them pure compliant).
+ """
+ lines: list[str] = []
+ lines.append("=== Exception Handling Audit: Files Grouped by Migration Effort ===\n")
+ lines.append(f"Files scanned: {files_scanned}")
+ lines.append(f"Files with findings: {len(reports)}\n")
+
+ baseline = [r for r in reports if r.is_refactored_baseline]
+ large = [r for r in reports if not r.is_refactored_baseline and r.violation_count + r.suspicious_count >= 16]
+ medium = [r for r in reports if not r.is_refactored_baseline and 6 <= r.violation_count + r.suspicious_count <= 15]
+ small = [r for r in reports if not r.is_refactored_baseline and r.violation_count + r.suspicious_count <= 5]
+
+ def _bucket(name: str, files: list[FileReport], note: str) -> None:
+  if not files:
+   return
+  v = sum(r.violation_count for r in files)
+  s = sum(r.suspicious_count for r in files)
+  u = sum(r.unclear_count for r in files)
+  c = sum(r.compliant_count for r in files)
+  total = v + s + u + c
+  lines.append(f"--- {name} ({len(files)} files, V+S={v+s}, V={v}, S={s}, ?={u}, C={c}, total={total}) ---")
+  if note:
+   lines.append(f"  {note}")
+  for r in sorted(files, key=lambda x: -(x.violation_count + x.suspicious_count)):
+   name = r.filename.replace("src/", "").replace("\\", "/")
+   lines.append(f"  {name:<36} V={r.violation_count:>3} S={r.suspicious_count:>2} ?={r.unclear_count:>2} C={r.compliant_count:>3} total={len(r.findings)}")
+  lines.append("")
+
+ _bucket(
+  "LARGE (>=16 V+S; dedicated track per file)",
+  large,
+  "Each file is too big for a batched track. 1 track per file; 2-3 days Tier 2 each.",
+ )
+ _bucket(
+  "MEDIUM (6-15 V+S; can group 2-3 files per track)",
+  medium,
+  "Each file is independent; can be batched in 1 track per group. 0.5-1 day Tier 2 each.",
+ )
+ _bucket(
+  "SMALL (<=5 V+S; batched in one 'small files' track)",
+  small,
+  "Each file is small enough for a single batched track. 0.5-1 day Tier 2 for the whole batch.",
+ )
+ _bucket(
+  "BASELINE (3 refactored files; the convention reference)",
+  baseline,
+  "These files ARE the convention. Remaining violations are gaps to close (deferred work from the parent track).",
+ )
+ return "\n".join(lines) + "\n"
+
+
 def main() -> int:
  parser = argparse.ArgumentParser(
   description=__doc__,
@@ -746,6 +840,8 @@ def main() -> int:
  parser.add_argument("--include-tests", action="store_true", help="Also scan tests/ and scripts/")
  parser.add_argument("--strict", action="store_true", help="Exit 1 if any violations are found (for CI use)")
  parser.add_argument("--include-baseline", action="store_true", help="Include the 3 refactored files in the violation count (default: exclude)")
+ parser.add_argument("--summary", action="store_true", help="Per-file summary table (for migration planning)")
+ parser.add_argument("--by-size", action="store_true", help="Group files by migration effort bucket (small/medium/large/baseline)")
  parser.add_argument("--exclude", action="append", default=[], help="Additional path components to exclude (can repeat)")
  args = parser.parse_args()
 
@@ -776,6 +872,14 @@ def main() -> int:
    total_violations = sum(r.violation_count for r in reports if not r.is_refactored_baseline)
   return 1 if (args.strict and total_violations > 0) else 0
 
+ if args.summary:
+  print(render_summary(reports, len(files)))
+  return 0
+
+ if args.by_size:
+  print(render_by_size(reports, len(files)))
+  return 0
+
  print(render_human(reports, len(files), args.top, args.verbose))
 
  if args.include_baseline: