Agent skills for Codex CLI

Reference-first frontend design workflow.

Mastermind stoporg — stop a running org.

Builds sophisticated AI agents with integrated memory, deterministic workflows, RAG, and MCP support using the Mastra TypeScript framework.

Documentation guidelines for Mastra. This skill should be used when writing or editing documentation for Mastra. Triggers on tasks…

Smoke test Mastra projects locally or deploy to staging/production.

Build automated billing systems for recurring payments, invoicing, subscription lifecycle, and dunning management.

This skill should be used for browser automation tasks using Chrome DevTools Protocol (CDP).

Master Godot 4 GDScript patterns including signals, scenes, state machines, and optimization.

Implement PCI DSS compliance requirements for secure handling of payment card data and payment systems.

Implement Stripe payment processing for robust, PCI-compliant payment flows including checkout, subscriptions, and webhooks.

A margin-recovery diagnosis for a regional grocery chain — the governing thought, the driver tree, the priorities, and the roadmap.

Matchmaking skill for ELO/MMR and skill-based matching.

Implement Google's Material Design 3 (Material You) UI system.

Google's Material Design with layered surfaces, dynamic theming, built-in motion, and responsive cross-platform patterns.

Skill for planning and specifying mechanical material tests per ASTM standards

Material UI Installation and Setup (v9, 2026-08).

Materials database query skill for accessing structure and property data from multiple repositories

Convert photographs of materials-testing equipment into scientifically faithful, moderately simplified, isometric 3D schematics for SCI…

Implement UI using Material Design 3 with Material Web (`@material/web`) based on the official quick-start flow.

Multi-layer cognitive stack for machine-verified mathematical problem solving across 14 sub-disciplines.

Guide to the math cognitive stack - what tools exist and when to use each