Add a grader-revision loop ('Performance Outcomes') so sub-agents retry until they pass a rubric

Totalum·medium signal

Beyond fan-out, the 2026 Claude Code pattern pairs Dynamic Workflows (a lead agent planning tens-to-hundreds of parallel sub-agents) with a separate grader that scores each sub-agent's result against a rubric and bounces it back to revise until it clears the bar. This shifts quality control from the orchestrator's hope to an explicit pass/fail gate per unit of work. The skill: define an explicit rubric per sub-task and wire a grader stage that returns work to the producer, rather than accepting first-pass sub-agent output.