Charlie HillsClaude skill · Skills for everyone
Prompt Lab
/prompt-lab
Turn an idea for a prompt into a finished, tested prompt in one turn. You type the idea, and the prompt comes back in a code block, graded out of 100 against Anthropic's current published prompting guidance (fetched live every run) and a plain bar any reader can run. The pass mark is 95, and Claude runs the prompt itself before handing it over whenever it can.
Free. Built and used by me, Charlie Hills.
Install it in two minutes
The same zip works in the Claude app and in Claude Code.
In the Claude app
- Download the zip. Keep it zipped.
- Open Settings → Capabilities and turn on Code execution and file creation.
- Go to Customize → Skills, press +, then Create skill → Upload a skill, and pick the zip.
- Type
/prompt-labin any chat, or just ask for the job. Claude reaches for it on its own.
In Claude Code
- Download the zip to your Downloads folder.
- Run this in your terminal:
- Start a new session and type
/prompt-lab.
Agent Harness Setup
Walks you through your whole Claude setup: personal instructions, project context, skills and connectors.
AI Second Brain
Builds a living, searchable second brain from your ChatGPT, Claude and research history.
Answer First
Shape every answer so the bottom line comes first. Sentence one is the answer, the number, the verdict or the one thing to do. Everything after it is support.
Choose And Compare Models
Help you choose an available AI model for a specific task, compare real outputs from two models, and decide whether switching is worth it.
Close
End a good session properly.
Exposure Audit
Audit what you are actually exposed to, live API keys sitting in cloud-synced folders.