The GTM Co-Founder

GTM Co-Founder is a free, MIT-licensed set of 20 Agent Skills for whoever owns go-to-market for a developer tool or an AI product.

It is not a hosted service. There is no account, no API key, no API, no SDK and no usage limit. The skills install into your own coding agent, such as Claude Code, Cursor or another agent that supports skills or plugins.

Your GTM co-founder for developer tools and AI products.

The operator's playbook for taking a technical product to market, whether you're the founder, the first GTM hire, or the founding AE.

Your agent is too nice. Just like the team around you. This is the GTM co-founder that says what they won't.

For whoever owns the go-to-market: technical founders, founders with GTM experience, early or first GTM hires, founding account executives, and fractional GTM operators. Building a developer tool or an AI product.

Open-source go-to-market skills. Answer five questions, research the market with linked sources, get a prioritized GTM roadmap, then work the plan. Not marketing tactics or SEO. The strategy half: who it's for, why they pay, first users.

Free. MIT. Runs inside the agent you already code in.

Install

npx skills add AIDevGTM/gtm-cofounder

# or as a Claude Code plugin
/plugin marketplace add AIDevGTM/gtm-cofounder
/plugin install gtm-cofounder@gtm-cofounder

# or clone it
git clone https://github.com/AIDevGTM/gtm-cofounder.git

The 20 skills

Setup

  start-here                      Set up your founder brief so every skill knows your real business, grounded by a scan of your repo.

  research-the-market             Find where your users already are and how products like yours launched, before the plan is written.

  strategy-and-roadmap            Turn the brief into an honest diagnosis and a prioritized plan.

Runs throughout (a gate)

  review-the-work                 Stress-test any deliverable as a skeptic before it reaches you (a gate, runs throughout).

Figure out who it's for

  who-is-this-for                 Turn "developers" into a real ICP with a clear "not for."

  talk-to-users                   Get real evidence instead of guessing.

Say it so it lands

  positioning-and-story           Lead with their problem, and find your villain.

  beyond-the-wrapper              Position an AI product when everyone claims AI (AI products only).

  value-prop-that-converts        Kill puffery and say it so a developer repeats it.

  the-homepage                    Write for the developer who visits, not the buyer who doesn't.

Get your first users

  time-to-first-value             Get people to the "aha" fast, and back again.

  first-50-users                  Find your first channel and your first users.

  launch-it                       Ship the Show HN, Reddit, or Product Hunt launch without fear.

  growth-loops                    Build the loops that get the next 5,000 users without you pushing.

  market-to-devs-sell-to-buyers   Turn developer love into revenue across the user and buyer gap.

  pricing                         Find the number, the value metric, and the free-to-paid line.

  founder-led-sales               Run the first sales conversations and actually close.

Keep it going

  founder-led-content             Do marketing that does not feel gross.

  know-if-its-working             Cut the vanity metrics and measure what matters.

  market-scan                     Refresh your positioning when the market shifts.

First run

Open your project in your coding agent and run start-here. It scans the repo, asks five questions and writes docs/gtm-cofounder/founder-brief.md.

Run research-the-market to research the market with linked sources, then strategy-and-roadmap to write docs/gtm-cofounder/gtm-roadmap.md. Run review-the-work as an adversarial review pass.

Pricing

All 20 agent skills are free and MIT licensed. Hands-on GTM help from Shane O'Connor is available separately, priced per engagement, through Book a meeting.

Links

Built from real dev-tool and AI product GTM experience, sharpened by Adam Frankl and Jakub Czakon, and pressure-tested by real founders who used it as design partners.

Built by Shane O'Connor, GTM advisor, Cork, Ireland.