Charlie HillsClaude skill
AI Second Brain
/ai-second-brain
Builds a living, searchable second brain from your ChatGPT, Claude and research history.
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
/ai-second-brainin 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
/ai-second-brain.
Agent Harness Setup
Walks you through your whole Claude setup: personal instructions, project context, skills and connectors.
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.
Improve System
Mine your own Claude Code history for what keeps going wrong, then fix it at the source.