Prompt Engineering

PostHog shares practical guidance for writing skills that help agents without locking them into a brittle workflow. The core idea is to load context progressively, define the goal and constraints, then let the agent choose steps that fit the repository and runtime environment.

The article also addresses maintenance: separate durable structure from fast-changing details, point to a single source of truth, and regenerate skills instead of patching them indefinitely. Skills carry context and upkeep costs, so they make most sense for recurring tasks where agents lack essential context or perform poorly by default.

Refero Styles offers a browsable collection of over 2,000 design systems from well-known product sites, each paired with a DESIGN.md file readable by AIs like Cursor, Claude, or ChatGPT. The tool lets you inspect colors, typography, spacing, and components, then reuse these styles in your own projects or AI prompts. It’s a practical resource to give visual context to an assistant or speed up interface design inspired by market references.

Prompt Motion is a gallery of motion videos accompanied by the prompts and skills used to create them with Claude Opus 5.5. Examples can be browsed by type, from product UI and charts to kinetic typography and particles, then adapted to a project as a starting point for AI-assisted motion design.