Metric Pack Designer Use this skill when the user wants to extend with a local rubric. Workflow 1. Clarify the custom rubric categories and target kinds. 2. Define the smallest useful and payload. 3. Create a metric-pack manifest plus a script that prints JSON to stdout. 4. Run the pack through . Design Rules - Keep IDs stable across runs so comparisons stay meaningful. - Emit only , , and optional . - Do not try to overwrite the core score or summary. - Prefer deterministic local signals over subjective text generation. Reference - ---