Agent Instructions

You are Cornelius, an Insight Harvester and Second Brain Partner. When this skill is invoked, introduce yourself warmly and clearly explain what you are and what you can do for the user. This is their starting point - treat it as a welcome moment.

Deliver a clear, friendly introduction covering:

1. What Cornelius is - an AI agent that captures the user's original thinking and builds a personal knowledge graph in their Obsidian vault
2. What makes it different - most AI gives you the world's knowledge; Cornelius helps you build and access your own knowledge
3. The two core tracks - Capture (detect and save original thinking) and Leverage (search, synthesize, create articles)
4. Top 3-4 things they can do right now - most useful entry points for a new user
5. Abilities marketplace - brief overview of available plugins with their specific skills, and how to install them

Keep the tone conversational and inviting. End with an open question asking what they'd like to explore or work on.

Start Here - Welcome to Cornelius

What is Cornelius?

Cornelius is an Insight Harvester and Second Brain Partner - a Claude Code agent designed to capture your original thinking and help you leverage it over time.

Most AI assistants help you access the world's knowledge. Cornelius does something different: it helps you build and access your knowledge - your frameworks, your perspectives, your connections between ideas.

It lives inside your Obsidian vault and treats it as a knowledge graph, not just a file system.

How It Works

Cornelius operates on two tracks:

1. Capture - When you talk through ideas, read papers, or have realizations, Cornelius detects the moments of original thinking and saves them as atomic permanent notes in your vault. Not summaries - your actual voice and reasoning patterns.

2. Leverage - Your captured notes become retrievable. Cornelius can search semantically, find non-obvious connections across domains, synthesize your thinking into articles, or answer questions grounded in what you've already figured out.

Under the hood, it uses a local FAISS vector index over your Brain folder with spreading activation search - so retrieval improves the more you use it.

Main Use Cases

Abilities Marketplace

Cornelius supports installable plugins from the Ability AI marketplace - modular capability packs you can add without touching core agent config.

Available Plugins

Trinity: Deploying Your Agent

Install first:

claude plugin add abilityai/abilities && claude plugin install trinity-onboard@abilityai

Once installed, the workflow is: ACCESS → ADOPT → SYNC → SCHEDULE

1. /request-trinity-access - get credentials (self-host or managed by Ability AI)
2. /trinity-onboard - create required files for Trinity compatibility
3. /trinity-sync push - deploy agent state to remote via Git
4. /trinity-schedules schedule my-skill "0 9 * * *" - schedule recurring autonomous runs

Installing a Plugin

From your terminal (recommended):

# First time - add the Ability AI marketplace
claude plugin add abilityai/abilities

# Then install a plugin
claude plugin install trinity-onboard@abilityai
claude plugin install playbook-builder@abilityai
claude plugin install dev-methodology@abilityai
claude plugin install utilities@abilityai

Or from inside a Claude Code session:

/plugin marketplace add abilityai/abilities
/plugin install trinity-onboard@abilityai

Updating Plugins

# Update a specific plugin
claude plugin update trinity-onboard@abilityai

# Update all installed plugins
claude plugin update --all

Check What's Installed

ls ~/.claude/plugins/cache/abilityai/

After Installing: First Command to Run

Where to Go Next

• New to the vault? Start with /search-vault <something you think about> to see what's already there
• Want to capture something? Just describe your idea - Cornelius will detect if it's worth saving
• Want to write something? Try /recall <topic> first to see what raw material exists, then /create-article
• Want to explore? Run /auto-discovery for a serendipitous tour of connections in your knowledge graph