A packaged set of instructions, in a markdown file with a short header, that tells an AI agent how to do one specific job. For agencies, skills are how you turn a workflow that lives in one person’s head into something the agent runs the same way every time.
Also known as Skills
An agent skill is a folder containing a markdown file with YAML frontmatter (a short block of structured metadata) that describes what the skill does, when to use it, and the step-by-step instructions the agent should follow. Anthropic released the format in December 2025, and within weeks OpenAI, Google, GitHub, and Cursor had adopted compatible versions, which made skills a de facto standard rather than one vendor’s feature.
The appeal is that a skill is portable and legible. It is not a fine-tuned model or a hidden prompt buried in a product’s backend. It is a file a person can open, read, and edit, which means the people who know a workflow best, not just the engineers, can write and maintain the instructions an agent follows.
Agencies live on repeatable-but-not-quite-identical work, and skills are built for exactly that gap.
They capture house style without a style guide meeting. A skill can encode how the agency writes client-facing recaps, formats a media plan, or checks copy against a brand’s tone, so a new hire’s AI output already sounds like the agency on day one.
They reduce the which-prompt-did-we-use-last-time problem. Instead of a shared doc of half-remembered prompts, a skill is a single versioned file the whole team points their agent at, so the workflow behaves the same way whether the strategist or the intern runs it.
They make AI work auditable. Because a skill’s instructions are plain text, a client, or a nervous account lead, can actually read what the agent was told to do, which matters when someone asks how a piece of AI-assisted creative got approved.
A creative studio builds a skill called client-recap that takes raw meeting notes and produces a formatted internal recap in the studio’s exact structure: decisions, open questions, next steps, owner, due date. Every account person on the team runs the same skill after every client call instead of improvising their own format. When a new project manager joins six months later, she runs the same skill on her first call and her recap is indistinguishable from one written by a five-year veteran.
The automations and agents module of the workshop teaches you how to build AI workflows that compress the busywork without taking the craft out of the studio.