usage: pactkit spec-graph [-h] [--specs-dir SPECS_DIR] [--write-graph]
                          [--graph-path GRAPH_PATH] [--json]

options:
  -h, --help            show this help message and exit
  --specs-dir SPECS_DIR
                        Directory containing spec files
  --write-graph         Write Mermaid graph to --graph-path
  --graph-path GRAPH_PATH
                        Mermaid output path
  --json                Emit machine-readable JSON (waves + conflicts)
