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"""source/*.md (frontmatter + body) -> data/knowledge.jsonl."""
import json
import re
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent.parent
OUT = ROOT / "data" / "knowledge.jsonl"


def frontmatter(text: str) -> dict:
    m = re.match(r"^---\n(.*?)\n---\n?", text, re.S)
    out = {}
    if m:
        for line in m.group(1).splitlines():
            kv = re.match(r"^(\w+):\s*(.*)$", line)
            if kv:
                out[kv.group(1)] = kv.group(2).strip()
    return out


def main() -> None:
    rows = []
    for p in sorted((ROOT / "source").glob("*.md")):
        if p.name == "README.md":
            continue
        text = p.read_text()
        fm = frontmatter(text)
        rows.append({
            "id": p.stem,
            "title": fm.get("title", p.stem),
            "summary": fm.get("summary", ""),
            "content": text,
        })
    OUT.parent.mkdir(exist_ok=True)
    with OUT.open("w") as f:
        for r in rows:
            f.write(json.dumps(r) + "\n")
    print(f"{OUT.name}: {len(rows)} documents")


if __name__ == "__main__":
    main()