SKILL-015 AI-assisted SaaS building workflow Locked skill

Build-vs-buy decision

Buy your undifferentiated heavy lifting and build only what your customers pay you to be uniquely good at.

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What this skill helps you build

A repeatable scoring process for deciding when to use an off-the-shelf package, a hosted service, or custom code — weighing cost, control, risk, time-to-value, and lock-in.

The production takeaway

Buy your undifferentiated heavy lifting and build only what your customers pay you to be uniquely good at.

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Inside this skill

The full skill expands these implementation areas with decisions, edge cases, prompts, tests, and framework-specific code.

AI-assisted SaaS building workflow
What this helps you build

A decision artifact — a short, scored document you can produce in twenty minutes that tells you, for a given capability, whether to write it yourself, pull in a library, or pay a h

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AI-assisted SaaS building workflow
When to use this

Run this the moment a feature requires a capability that is not the thing your customers actually pay you for. Concretely, reach for the scorecard when you hit: Auth, billing, emai

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AI-assisted SaaS building workflow
The core idea

Spend your scarce engineering time on the work that differentiates you, and buy or borrow everything else. Customers pay you for your core domain — they do not pay you for the SMTP

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Unlock the full implementation

Paid access includes the complete skill body, implementation prompt, common mistakes, production checklist, and code examples where this skill includes them.