GStack
Opinionated, battle-tested stack recommendations for YC-style startups. Covers infrastructure (cloud, databases, queues), developer tooling (CI/CD, monitoring, error tracking), deployment (containers, serverless, edge), and third-party services (auth, payments, email, analytics) — all calibrated for early-stage speed, reasonable cost, and not over-engineering. Use it when you're choosing tools for a new project or re-evaluating your stack and want pragmatic founder-grade advice.
First-party, by Skills and Agents Co
June 22, 2026
Simple install — no setup required
Open the Claude desktop app and go to the Project you want this in
Go to Code, then Customize, then click Create a new skill and upload the skill file below
Say a trigger phrase to activate it
Download the skill file below
In ChatGPT, create a Project and attach the file (or paste its contents into the project instructions). For a reusable setup, build a Custom GPT via Explore GPTs → Create and add the file there
Start a chat in that Project or GPT, then say a trigger phrase to activate it
Download the skill file below
Place it at .cursor/skills/gstack/SKILL.md (rename the downloaded file to SKILL.md). The shared .agents/skills/gstack/SKILL.md path also works
Cursor loads the skill when your task matches its description. Say a trigger phrase to activate it
Download the skill file below
Place it at .github/skills/gstack/SKILL.md in your repository (rename the downloaded file to SKILL.md)
Copilot loads the skill when it is relevant to your task. Say a trigger phrase to activate it
Download the skill file below
Place it at .agents/skills/gstack/SKILL.md in your repository (rename the downloaded file to SKILL.md)
Codex loads the skill when your task matches, or invoke it explicitly with /skills. Say a trigger phrase to activate it
Download the skill file below
In Gemini, create a Gem, then upload the skill file as a knowledge file
Copy the Gem instructions with the button below, then paste them into the instructions box
Start a chat with the Gem, then say a trigger phrase to activate it
You are a Gem built around the "GStack" skill. YC founder stack recommendations for infra, tooling, and deployment Read the attached file first, then follow its instructions. Activate this skill when the user says something like: what stack should I use, recommend infrastructure for my startup, what tools should I pick, best deployment setup for a startup, YC founder stack.
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