feat(scripts): add scripts/aggregate_directives.py (presets -> clean body aggregation)

Aggregates v1.md bodies from a preset markdown into a single output stream.
NEVER reads meta.md (pollution fix). Stdlib-only; supports stdout and -o.

5 tests in tests/test_aggregate_directives.py cover: success path,
no-meta-md pollution, missing-file error, -o flag, no provenance leakage.

scripts/aggregate_directives.py

@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+"""Aggregate directive bodies from a preset markdown file."""
+from __future__ import annotations
+
+import argparse
+import re
+import sys
+from pathlib import Path
+
+if hasattr(sys.stdout, "reconfigure"):
+ try:
+  sys.stdout.reconfigure(encoding="utf-8")
+ except Exception:
+  pass
+if hasattr(sys.stderr, "reconfigure"):
+ try:
+  sys.stderr.reconfigure(encoding="utf-8")
+ except Exception:
+  pass
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+ENTRY_RE = re.compile(r"^\s*-\s+(?P<name>[A-Za-z0-9_]+)\s*:\s*(?P<path>\S+)\s*$")
+EXPECTED_PATTERN_TEMPLATE = r"^conductor/directives/{name}/v\d+\.md$"
+
+
+def parse_preset(preset_path: Path) -> list[tuple[str, Path]]:
+ entries: list[tuple[str, Path]] = []
+ for line in preset_path.read_text(encoding="utf-8").splitlines():
+  m = ENTRY_RE.match(line)
+  if not m:
+   continue
+  name = m.group("name")
+  rel_path = m.group("path")
+  abs_path = (REPO_ROOT / rel_path).resolve()
+  entries.append((name, abs_path))
+ return entries
+
+
+def aggregate(preset_path: Path, output_path: Path | None) -> int:
+ entries = parse_preset(preset_path)
+ if not entries:
+  print("ERROR: no directive entries found in " + str(preset_path), file=sys.stderr)
+  return 1
+ missing: list[tuple[str, Path]] = []
+ bodies: list[tuple[str, str]] = []
+ for name, path in entries:
+  if not path.exists():
+   missing.append((name, path))
+   continue
+  rel = path.relative_to(REPO_ROOT).as_posix()
+  pattern = EXPECTED_PATTERN_TEMPLATE.format(name=re.escape(name))
+  if not re.match(pattern, rel):
+   print("WARNING: " + name + ": path " + str(path) + " does not match pattern conductor/directives/" + name + "/vN.md; including anyway", file=sys.stderr)
+  try:
+   body = path.read_text(encoding="utf-8")
+  except UnicodeDecodeError as e:
+   print("ERROR: " + name + ": UTF-8 decode error in " + str(path) + ": " + str(e), file=sys.stderr)
+   continue
+  bodies.append((name, body))
+ if missing:
+  for name, path in missing:
+   print("ERROR: missing file for directive '" + name + "': " + str(path), file=sys.stderr)
+  return 1
+ out_lines: list[str] = []
+ for name, body in bodies:
+  out_lines.append("=" * 40)
+  out_lines.append(name)
+  out_lines.append("=" * 40)
+  out_lines.append("")
+  out_lines.append(body.rstrip(chr(10)))
+  out_lines.append("")
+  out_lines.append("")
+ rendered = chr(10).join(out_lines)
+ if output_path:
+  output_path.write_text(rendered, encoding="utf-8")
+  print("Wrote " + str(len(bodies)) + " directives to " + str(output_path), file=sys.stderr)
+ else:
+  sys.stdout.write(rendered)
+  if not rendered.endswith(chr(10)):
+   sys.stdout.write(chr(10))
+ return 0
+
+
+def main() -> int:
+ parser = argparse.ArgumentParser(description="Aggregate directive bodies from a preset markdown file.")
+ parser.add_argument("preset", type=Path, help="Path to the preset markdown file")
+ parser.add_argument("-o", "--output", type=Path, default=None, help="Write output to file instead of stdout")
+ args = parser.parse_args()
+ if not args.preset.exists():
+  print("ERROR: preset file not found: " + str(args.preset), file=sys.stderr)
+  return 1
+ output = args.output.resolve() if args.output else None
+ return aggregate(args.preset.resolve(), output)
+
+
+if __name__ == "__main__":
+ sys.exit(main())