Immediate result: A structured list of decisions co-founders must agree on, with questions and options for each.
Problem it solvesCo-founder disputes over equity, roles and exits destroy startups that could have survived.
3 founders, one full-time, two joining in 6 months
Vesting: 4 years, 1-year cliff is common — should it start at joining full-time?
Question: 'If one founder leaves in year one, what happens to their shares?'
Option: different start dates for vesting per founder.
Disputes over equity, roles and exits destroy startups that could otherwise have survived. This skill lists the decisions co-founders must agree on — equity split, vesting, roles, decision rights, salaries, time commitment, intellectual property and what happens when someone leaves — with discussion questions, common options and their trade-offs for each. It ends with a summary of agreed terms to take to a lawyer, because the final agreement must be drafted by one. To use it, paste the skill into your assistant and send the number of founders, their roles and anything already agreed; the reply is laid out as “Topics with questions”, “Options and trade-offs” and “Agreed / to discuss”.
# Skill: Co-founder alignment
You are running the "Co-founder alignment" skill for me. I work as: Startup founder. What I need from you: a structured list of decisions co-founders must agree on, with questions and options for each.
## When I send you the number of founders, their roles and anything already agreed
1. List topics: equity split, vesting, roles, decision rights, salary, time commitment, IP, exits.
2. Write discussion questions for each.
3. Give common options and trade-offs.
4. Produce a term summary to take to a lawyer.
## Reply in this format
- Topics with questions
- Options and trade-offs
- Agreed / to discuss
- Summary for your lawyer
## Rules
- Not legal advice; the final agreement needs a lawyer.
- Use only the facts I give you; mark anything you had to assume with [ASSUMPTION].
- If something essential is missing, ask me one short question, then continue.
- No preamble or filler: start with the result.
Confirm you're ready in one line, then wait for me to send the number of founders, their roles and anything already agreed.Then sendThe number of founders, their roles and anything already agreed. For example: 3 founders, one full-time, two joining in 6 months
Upload it to Claude, add it to ChatGPT's Codex app, clone it into Claude Code, or download the SKILL.md for any agent. Full guide with screenshots →
Download the ZIP and upload it in Claude. Claude then uses the skill on its own whenever a request matches.
Download ZIP
OpenAI's Codex app reads the same SKILL.md format. Copy the skill into your Codex skills folder:
$ git -c http.version=HTTP/1.1 clone https://scienceofapps.com/skills/ai-skills.git
$ cp -r ai-skills/cofounder-agreement-checklist ~/.codex/skills/
Clone the library and copy this skill into your Claude Code skills folder.
$ git -c http.version=HTTP/1.1 clone https://scienceofapps.com/skills/ai-skills.git
$ cp -r ai-skills/cofounder-agreement-checklist ~/.claude/skills/~/.claude/skills/ for all projects, or .claude/skills/ inside one project.Download the skill file and put it in a folder named after the skill.
Download SKILL.md~/.claude/skills/cofounder-agreement-checklist/SKILL.md.Repositoryscienceofapps.com/skills/ai-skills.git · all 200 skills, one folder each, plain git over HTTPS
Co-founder disputes over equity, roles and exits destroy startups that could have survived. The skill fixes that: a structured list of decisions co-founders must agree on, with questions and options for each.
Copy the skill and paste it as the first message of a new chat, then send your input. To keep it, paste it into a ChatGPT Project or custom GPT, a Claude Project or a Gemini Gem, or upload the SKILL.md file as a Claude Skill.
Send the number of founders, their roles and anything already agreed. If something essential is missing, the skill asks you one short question and then continues.
Yes. It's free to copy, use and adapt, with no sign-up, and works in the free versions of ChatGPT, Claude, Gemini and Copilot.
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Metric: installs → first summary (activation).
Immediate resultA seven-day launch plan with posts, channels, outreach lists and what to measure each day.
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