Step 0 of 5 · optional
Already built a custom GPT? Bring its files and instructions over and most of the plan fills itself. Nothing is uploaded and no AI runs on this page: it's plain pattern matching, and you can edit every field after.
Copy this prompt, paste it into a chat with your own GPT, and it will answer with a block of text in the exact shape this builder reads. Paste that block below and every field fills precisely. Your ChatGPT does the reading; this page just files it.
The PDFs, docs, text and spreadsheets you uploaded to the GPT. They become the plugin's reference files automatically, and their headings become skill suggestions.
In ChatGPT open your GPT → Edit GPT → Configure and copy these four boxes across.
Step 1 of 5
One clear job. If you can't say it in one sentence, simplify before you build.
Your north star sentence shows up here as you type.
Step 2 of 5
A skill is a mini operating procedure: WHEN → ASK → DO → DELIVER → AVOID. Don't make one giant skill do everything; break big jobs into smaller focused skills.
Step 3 of 5
An agent is the "who" that runs your skills: a named helper with a job, a tone and rules for when to stop. One agent is plenty for a first version.
Step 4 of 5
Starter prompts show people what they can do with it. Tests are how you know it works before you share it. Both are pre-filled from your plan; edit anything.
Step 5 of 5
Reference files your plugin should rely on (guides, templates, price lists, examples) and your logo. Check files for outdated pricing, broken links or private customer information first. Keep version one lean.
Your package
Plan your plugin for free. Unlock the builder once and download as many plugins as you like, on this device, forever.
New here? Read the step-by-step guide (it's also inside every zip as START-HERE.pdf).
STOP Don't upload the whole zip into Claude. Unzip it, then upload the small one-skill zips from skills-for-claude-ai/ one at a time. Why, and how →
skills-for-claude-ai/
One purchase unlocks every download below: the Skills zip, the Agents zip and the complete Portable Plugin zip, for as many plugins as you want to build. After you buy, tap the access link on your receipt page and this section opens up.
By purchasing you agree to the Terms of Use and Privacy Policy. You're responsible for what you build and how you use it.
Every skill as its own folder with a SKILL.md, ready to upload to Claude or drop into any plugin.
Your agents as portable agent files with a setup guide for Claude Code, Codex and ChatGPT.
The complete universal package: manifest, skills, agents, reference files, logo, prompts and test plan. Works across clients.
Add-on. Want it tuned for one platform? The ChatGPT Pack adds the OpenAI listing manifest, submission checklist and Plugin Creator prompt so it's ready for the directory. The Claude Pack adds the Claude plugin manifest, slash commands and install guide for Claude Code and claude.ai. Buy one, or both and save.
OpenAI manifest with listing details, Codex compatibility, submission checklist, five positive & three negative tests, release notes.
Claude plugin manifest, skills, agents, a slash command per skill, and the install guide for Claude Code and claude.ai.
Your plan auto-saves in this browser as you type. Saved plan files don't include your reference files or logo; re-add them when you load one.