Function extractGbrainBlock

lib/gstack-memory-helpers.ts:357–419

(frontmatter: string)

}

function extractGbrainBlock(frontmatter: string): GbrainManifest | null {
  // Naive YAML extraction — finds the `gbrain:` key and parses its sub-tree.
  // Real YAML parsing avoided to keep zero-deps; gen-skill-docs validates the
  // shape strictly at build time.
  const lines = frontmatter.split("\n");
  const start = lines.findIndex((l) => /^gbrain\s*:/.test(l));
  if (start === -1) return null;

  // Collect indented lines under `gbrain:` until next top-level key or EOF
  const block: string[] = [];
  for (let i = start + 1; i < lines.length; i++) {
    const line = lines[i];
    if (/^[A-Za-z_][A-Za-z0-9_-]*\s*:/.test(line)) break; // next top-level key
    block.push(line);
  }

  const text = block.join("\n");
  // Extract schema number
  const schemaMatch = text.match(/\n\s*schema\s*:\s*(\d+)/);
  const schema = schemaMatch ? parseInt(schemaMatch[1], 10) : 1;

  // Extract context_queries items
  const queries: GbrainManifestQuery[] = [];
  const cqMatch = text.match(/\n\s*context_queries\s*:\s*\n([\s\S]+)/);
  if (cqMatch) {
    const cqText = cqMatch[1];
    // Split using a positive lookahead so each chunk begins with the list-item dash.
    // Pattern: line starting with 4-6 spaces + "-" + whitespace.
    const rawItems = cqText.split(/(?=^[ ]{4,6}-\s)/m);
    const items = rawItems.filter((s) => /^[ ]{4,6}-\s/.test(s));
    for (const item of items) {
      const q: Partial<GbrainManifestQuery> = {};
      // Strip the leading list-item marker so id/kind/etc. regexes can use line-start.
      const body = item.replace(/^[ ]{4,6}-\s+/, "      ");
      const idM = body.match(/(?:^|\n)\s*id\s*:\s*([^\n]+)/);
      const kindM = body.match(/(?:^|\n)\s*kind\s*:\s*([^\n]+)/);
      const renderM = body.match(/(?:^|\n)\s*render_as\s*:\s*"?([^"\n]+?)"?\s*$/m);
      const queryM = body.match(/(?:^|\n)\s*query\s*:\s*"?([^"\n]+?)"?\s*$/m);
      const limitM = body.match(/(?:^|\n)\s*limit\s*:\s*(\d+)/);
      const globM = body.match(/(?:^|\n)\s*glob\s*:\s*"?([^"\n]+?)"?\s*$/m);
      const sortM = body.match(/(?:^|\n)\s*sort\s*:\s*([^\n]+)/);
      const tailM = body.match(/(?:^|\n)\s*tail\s*:\s*(\d+)/);

      if (idM) q.id = idM[1].trim();
      if (kindM) {
        const k = kindM[1].trim();
        if (k === "vector" || k === "list" || k === "filesystem") q.kind = k;
      }
      if (renderM) q.render_as = renderM[1].trim();
      if (queryM) q.query = queryM[1].trim();
      if (limitM) q.limit = parseInt(limitM[1], 10);
      if (globM) q.glob = globM[1].trim();
      if (sortM) q.sort = sortM[1].trim();
      if (tailM) q.tail = parseInt(tailM[1], 10);

      if (q.id && q.kind && q.render_as) {
        queries.push(q as GbrainManifestQuery);
      }