Claude Skills explained: How to create reusable AI workflows

Detailed Summary

Introduction (0:00 - 1:39)

• Claire Vo introduces Claude Skills, a new feature from Anthropic for creating and loading specific skills and tools into Claude Code, the API, or claude.ai.
• The episode will cover how to create and use skills, and provide workflow ideas.
• The sponsor, ChatPRD, an AI copilot for product managers, is highlighted for its ability to automate product documentation and coordination.

What are Claude Skills and how do they work? (1:39 - 8:30)

• Claude agent skills are defined as specific sets of instructions and context that Claude can call upon to perform tasks.
• They solve the problem of reusable workflows with on-demand instructions, adapting to conversation context.
• Skills differ from Claude Projects and OpenAI custom GPTs by being dynamic and task-specific, rather than general-purpose context.
• Claude Skills are based on natural language definitions, contrasting with rigid 'if this, then that' automation tools.
• Skills are essentially markdown files with instructions, metadata, and linked files, allowing for on-demand task execution.
• Observations include their utility for defining and discovering repetitive tasks, bundling additional content via relative file references, and integrating executable Python scripts for validation or technical implementation.
• A Claude skill is physically a folder containing a skills.md file and optional additional files, which can be referenced by Claude Code or uploaded as a zip file to claude.ai.

The structure of Claude Skills files (8:30 - 11:00)

• Every skill must have a skills.md file, which serves as the main prompt and instruction set.
• The skills.md file includes metadata (name, description) at the top to help the agent know when to call the skill.
• Instructions, leveraging prompt engineering skills, are placed in the body of the markdown file.
• Resources and other code can be referenced using relative links within the skills.md file, allowing for additional context or files to be called as needed.
• The skill folder can be used locally with Claude Code or zipped and uploaded to the Claude web app.

Demo: Creating Skills using Claude’s built-in skill creator (11:00 - 16:08)

• Claire attempted to use Claude's built-in skill creator by asking claude.ai to help create skills, specifically a PRD generation skill.
• The process involved a structured workflow, where Claude read example skills and detailed examples to understand the task.
• The generated skill.md included metadata, detailed instructions, decision trees, templates, writing best practices, example formats, questions for users, output format specifications, keywords for invocation, and additional resources.
• However, this method was inefficient, generating 12 files when only 5 were needed, and failing to provide a downloadable zip, requiring manual download of individual files.

A more efficient workflow: Creating Skills with Cursor (16:08 - 17:42)

• A more efficient method involves creating skills in Cursor, a code editor.
• This process starts by creating an empty folder, opening it in Cursor, and initiating a chat with Claude, providing it with the official documentation link for Claude Skills.
• This approach was significantly faster (approximately 3 minutes) and generated the necessary files, including a skills.md file, example skills, template files, and a validation script, in a structured folder.

Using Python validation scripts (17:42 - 18:37)

• Cursor automatically generated a skill validation script in Python, demonstrating how Python can be integrated into skills.
• This script checks YAML validation, file formatting, file existence, and content validation, showcasing a meta-use of Python for skill development.

Testing Skills with Claude Code (18:37 - 20:52)

• To use the created skills, Claude Code was launched in the local directory containing the skill folders.
• Claude Code automatically recognized and used the 'create skill' skill when prompted to create a new skill for converting changelog entries into a user-facing newsletter.
• The process involved Claude Code finding the create skill markdown file, reading its structure, creating a new directory for the changelog skill, writing its content, validating it with the Python script, and providing a summary.
• The resulting changelog-to-newsletter skill was simpler, consisting of a single file with metadata and instructions, demonstrating that linked files are optional.

Creating a changelog-to-newsletter Skill (20:52 - 22:16)

• After creating the changelog-to-newsletter skill, it was immediately invoked in Claude Code by simply providing the latest changelog entries.
• Claude inferred the intent to use the changelog skill without explicit commands, demonstrating its ability to select the appropriate skill based on context.
• The skill generated an engaging newsletter, highlighting the potential for revision to refine output format and style.

Creating a demo-to-follow-up-email Skill (22:16 - 23:45)

• Another skill was created to transform customer demo notes into follow-up emails for trial prospects.
• This process again utilized the 'create skill' skill within Claude Code, efficiently generating the new skill folder and its contents.
• This demonstrates the reusability of the meta-skill for rapid skill development.

Uploading Skills to the Claude web interface (23:45 - 26:04)

• To use skills in the Claude web UI or desktop app, the skill folder needs to be zipped.
• The zipped file is then uploaded through the Claude web interface's capabilities section.
• A key detail noted was that skill names for web UI upload must contain only lowercase letters and hyphens.
• Once uploaded, the skill becomes available for use in chats, allowing users to provide input (e.g., demo notes) for Claude to generate the desired output (e.g., follow-up email).

Conclusion (26:04 - 27:20)

• The episode summarized the definition and differentiation of Claude Skills, methods for creation (Cursor being preferred), and invocation in Claude Code or the web app.
• Claire encourages viewers to engage with the content and anticipates more deep dives into new AI capabilities and workflows.

Notable Quotes

"Claude agent skills are a specific set of instructions and context that can be called on by Claude whether you're using Claude Code, the web or desktop app to do a specific set of tasks."
— Claire Vo

"What's nice about Quad Skills that I like is that it really is just natural language."
— Claire Vo

"A cloud skill, the actual object, the thing that you make is a folder."
— Claire Vo

"I found that creating cloud skills in cursor was the easiest way to get this stuff done."
— Claire Vo

"You don't have to use like a magic a magic word. You don't have to say like invoke the Claude skill to do AB and C. You can literally I said okay here's the latest change log... and it inferred what I wanted based on the skills available in my folder."
— Claire Vo