
How to build a portable loop goal harness using only skills and shell scripts—no SDK lock-in. Cross-provider survey of OpenAI, Anthropic, LangGraph, Google ADK, and Cursor, plus simplicity skills that keep agents from over-building.

How to write implementation-agnostic assertions with stable IDs, verification methods, and edge cases—so your mission harness blocks "looks done" handoffs before they ship.

A practical tutorial on the mission skill, Orchestrator–Worker–Validator roles, serial execution gates, and the infrastructure harness that keeps multi-agent coding sessions safe and shippable.