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.

tests/test_aggregate_directives.py

@@ -0,0 +1,70 @@
+"""Tests for scripts/aggregate_directives.py.
+
+These tests exercise the script via subprocess to verify the contract:
+ - reads v1.md files only (never meta.md)
+ - emits clean bodies separated by '====' header
+ - exits 1 on missing files
+ - emits to stdout by default; -o writes to file
+"""
+from __future__ import annotations
+
+import subprocess
+import sys
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+SCRIPT = REPO_ROOT / "scripts" / "aggregate_directives.py"
+PRESET = REPO_ROOT / "conductor" / "directives" / "presets" / "current_baseline.md"
+
+
+def _run(args: list[str], cwd: Path | None = None) -> subprocess.CompletedProcess:
+ return subprocess.run(
+ [sys.executable, str(SCRIPT), *args],
+ capture_output=True,
+ text=True,
+ encoding="utf-8",
+ cwd=cwd or REPO_ROOT,
+ )
+
+
+def test_runs_against_current_baseline() -> None:
+ result = _run([str(PRESET)])
+ assert result.returncode == 0, "script should succeed; stderr=" + result.stderr
+ body = result.stdout
+ assert "atomic_per_task_commits" in body
+ assert "ban_dict_any" in body
+ assert "knowledge_harvest_pattern" in body
+ assert body.count("========================================") >= 51 * 2
+
+
+def test_meta_md_pollution_fix() -> None:
+ result = _run([str(PRESET)])
+ body = result.stdout
+ assert "**Why this iteration:**" not in body
+ assert "**Lifted:**" not in body
+
+
+def test_missing_file_exits_nonzero(tmp_path: Path) -> None:
+ bad = tmp_path / "bad_preset.md"
+ bad.write_text("- missing_thing: conductor/directives/missing_thing/v1.md\n", encoding="utf-8")
+ result = _run([str(bad)])
+ assert result.returncode != 0
+ assert "missing_thing" in result.stderr
+
+
+def test_output_flag_writes_to_file(tmp_path: Path) -> None:
+ out = tmp_path / "out.md"
+ result = _run([str(PRESET), "-o", str(out)])
+ assert result.returncode == 0
+ assert out.exists()
+ content = out.read_text(encoding="utf-8")
+ assert "ban_dict_any" in content
+ assert content.count("========================================") >= 51 * 2
+
+
+def test_no_meta_md_reads() -> None:
+ result = _run([str(PRESET)])
+ body = result.stdout
+ assert "Provenance" not in body
+ assert "## v1" not in body
+ assert "# ban_dict_any" not in body