Method groupDefinitions

src/mcp/tools.ts:1607–1632

* Group symbol matches into DISTINCT DEFINITIONS — one group per * (filePath, qualifiedName), so same-file overloads stay together while * unrelated same-named classes across a monorepo's apps (#764: one * `UserService` per NestJS app) are kept apart. Optionally narrowed by a * `file` pa

(
    nodes: Node[],
    fileFilter: string | undefined
  )

   * `file` path/suffix first.
   */
  private groupDefinitions(
    nodes: Node[],
    fileFilter: string | undefined
  ): { groups: Node[][]; filteredOut: boolean } {
    let pool = nodes;
    let filteredOut = false;
    if (fileFilter) {
      const wanted = fileFilter.replace(/^\.\//, '');
      const narrowed = pool.filter(
        (n) => n.filePath === wanted || n.filePath.endsWith(wanted) || n.filePath.endsWith(`/${wanted}`)
      );
      if (narrowed.length > 0) {
        pool = narrowed;
      } else {
        filteredOut = true;
      }
    }
    const byDef = new Map<string, Node[]>();
    for (const n of pool) {
      const key = `${n.filePath}|${n.qualifiedName}`;
      const group = byDef.get(key);
      if (group) group.push(n);
      else byDef.set(key, [n]);
    }
    return { groups: [...byDef.values()], filteredOut };
  }

  /** Section heading for one distinct definition in grouped output. */
  private definitionHeading(group: Node[]): string {