{
  "skill": "writing-plans",
  "kind": "own",
  "needs": ["spec or requirements", "file structure decisions"],
  "produces": ["implementation-plan with bite-sized TDD tasks"],
  "constraints": ["only writes the plan file", "no code, no reads beyond plan authoring"],
  "preview-form": "outline",
  "defaults": ["one action per step (2-5 min)", "test->RED->code->GREEN->commit"],
  "key-decisions": ["file structure / decomposition", "task granularity"],
  "acceptance-criteria": ["every step has concrete content (no placeholders)", "types consistent across tasks"]
}