Agent skills for Microsoft Copilot

YC Office Hours — two modes. (gstack)

Use when starting a complex multi-step task to create an approved plan, track todos in SQL, and execute with checkpoints

THE BRAIN behind /toh-plan — analyzes the request or PRD, writes .toh/plan.md per the orchestration-protocol Section D schema (plans are…

Pressure-test a product idea, feature, plan, or client engagement BEFORE committing build effort.

Use after writing an implementation plan, before committing.

Slice one approved Controlled change into two or more independently verifiable human work items.

The shared domain model behind planning work: the Outcome Contract, the Scope Policy plug point, scope and unknown classifications…

Write implementation plans that a human can meaningfully review and approve, instead of goal-oriented task lists.

Apply when writing or editing PlantUML (.puml, .plantuml, .pu) files or when generating diagrams from text descriptions.

Add data visualization to a React Native or Expo app with @platform-blocks/charts.

Display data with the @platform-blocks/ui React Native library.

Show feedback and overlays with the @platform-blocks/ui React Native library.

Build forms with the @platform-blocks/ui React Native library.

Build screen layouts with the @platform-blocks/ui React Native library.

Build navigation with the @platform-blocks/ui React Native library.

Install and configure the @platform-blocks/ui React Native library in an Expo or React Native app.

Theme the @platform-blocks/ui React Native library.

Scaffolds production-grade Web platforms and admin dashboards from scratch using shadcn UI, Tailwind CSS v4, and modern registry workflows.

Draws the ownership line for an AI build.

Play chess against Chesster, the witty engine

Play, resume, inspect, or clear a terminal tic-tac-toe game with persistent user-scoped state and deterministic aggressive or defensive AI.