Founder OS: a Claude Code skill set for startup owners

Founders already use AI for everything: the investor update, the pricing page, the cold email. The results are usually generic, because a chat model with no method produces the average of the internet. The fix is not a better prompt. It is giving the model the workflow itself: the structure, the questions to ask first, and the mistakes to refuse. That is exactly what Claude Code skills are for, so I built a set of them for founders and open-sourced it.

Skills are not prompts

A skill is a small markdown file that Claude loads automatically when the job matches. It carries the method (an investor update leads with the same metrics every month), the intake (never write pricing copy before knowing the value metric), and the guardrails (mark missing numbers as missing instead of inventing them). You do not invoke anything. You say "write my June investor update" and the right skill wakes up.

What is inside

Eleven skills, mapped to the founder lifecycle. Validate: customer-discovery runs Mom Test interviews and separates real signal from polite lies, competitor-scan hunts for the wedge, mvp-cut reduces a feature list to the cheapest test of the riskiest assumption. Ship and sell: landing-copy, pricing-strategy, cold-outreach, launch-plan. Run: metrics-review and hiring-kit. Raise: investor-update and pitch-deck-review, which reads a deck the way a skeptical partner does in the first three minutes.

Guardrails are the product

Every skill carries opinions about what not to do, because that is where founders lose. The set refuses to fabricate metrics, hide competitors behind an all-green comparison matrix, or plan fake-upvote launch schemes. One ask per email, one assumption per MVP, one action per landing page, one experiment per week.

Adjectives never do the work of numbers. "Massive growth" is banned; "+41% MoM" is not.

Install it

The repo is a Claude Code plugin marketplace, so the whole set installs with two commands inside Claude Code:

/plugin marketplace add agentdynarq/founder-skills/plugin install founder-os@founder-skills

Prefer it manual? Clone the repo and copy any skill folder into ~/.claude/skills/. Everything is MIT, and each skill is under a hundred lines of readable markdown, so fork it and encode how your own company works. Issues and pull requests are open.