Machine result contract (internal)

Interactive skills remain text-first. A headless driver obtains a compact, validated result at the boundary; it does not add a repeated JSON section to every user-facing skill.

The canonical Turn contract remains here for the executor and review skills that load it.

The executable source of truth is @gtrabanco/agentic-workflow-schema: types, JSON Schemas, renderOutputInstruction(skill), parseTurn(input), and compileWorkflowSnapshot(input). This document states the policy only; do not copy a second schema here.

Output profiles

WORKFLOW_SKILL_PROFILES is the authoritative inventory.