AI Game Master Toolkit for Claude | Session Prep, NPC Generator, Campaign Notes | Digital Download

Prep less. Run better games.

Session Zero turns Claude into a co-GM who remembers everything. It keeps your campaign bible straight, builds a one-page prep sheet in minutes, designs encounters with the system's own balance math, voices NPCs on the fly and turns your messy notes into a recap your players will love.

This is a digital download of AI skills for Claude, the AI assistant by Anthropic. A skill is a set of expert instructions you add to your own Claude account. Nothing to print, no app to learn.

WHAT'S INCLUDED
• Campaign bible and continuity
• One-page session prep
• Balanced encounters and dungeons
• Puzzles and treasure
• NPC cards and names on the fly
• Recaps and arc planning
• Session zero and safety tools
• Updates for a year
• Bonus: the Session Recap skill
• Start Here guide (PDF) with two-minute setup steps

TRY ASKING
"Prep next session from this recap." "Balance a fight for four level 5 PCs." "Give me a tavern keeper with a secret."

HONEST ABOUT WHAT IT DOES
• Situations, not railroads: Options and secrets that work wherever the players go.
• Continuity checked: It checks the bible before inventing lore and flags contradictions.
• Respects the books: Uses the SRD and summarises the rest, pointing you to the page, without copying rulebooks.
• Table safety: Session zero questions, lines and veils, and the safety tools your table agreed on.

HOW IT WORKS
1. Download your 3 files right after purchase (2 skill ZIPs and the Start Here PDF).
2. In Claude, open Customize, then Skills, click +, choose Upload a skill and pick each ZIP. Keep them zipped.
3. Start a new chat and ask: "Here's my campaign and last session's notes. Prep a one-page sheet for next session."

WHAT YOU NEED
• A Claude account (claude.ai). The free plan works: turn on code execution in Settings, Capabilities.
• This is a digital file. No physical item will be shipped.

AI DISCLOSURE
I designed and wrote these skills with AI assistance, under my own creative direction and review. When you use them, Claude (an AI) writes the answers.

GOOD TO KNOW
Session Zero is a creative prep tool for tabletop games. It uses openly licensed rules content where available and doesn't reproduce copyrighted rulebooks or adventures.

LICENCE
Personal use by the buyer, in your own accounts. Please don't resell, share or publish the files. Made by What If Labs. Not affiliated with or endorsed by Anthropic. Claude is a trademark of Anthropic.

Questions or trouble installing? Message me on Etsy and I'll help.