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Cover image for Road To KiwiEngine #14: Why Everything In KiwiEngine Starts With Contracts
Drew Marshall
Drew Marshall

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Road To KiwiEngine #14: Why Everything In KiwiEngine Starts With Contracts

Most software projects begin with frameworks.

I begin with contracts.

Over the years, I've watched countless projects become tightly coupled to:

  • frameworks,
  • databases,
  • cloud providers,
  • libraries,
  • and implementation details.

The result is usually the same.

Changing anything becomes expensive.

Replacing anything becomes painful.

Innovation slows down.

That's why I've become obsessed with contracts.

What Is A Contract?

A contract is simply an agreement.

Not code.

Not implementation.

An agreement.

It defines:

  • inputs,
  • outputs,
  • expectations,
  • behaviors,
  • and guarantees.

Without caring how the work gets done.

The implementation can change.

The contract remains stable.

Why Contracts Matter

Imagine replacing:

  • PostgreSQL with MySQL
  • WordPress with another CMS
  • Local AI with cloud AI
  • AWS with Azure

Most systems struggle because they were designed around implementations.

Not contracts.

The tighter the coupling, the more painful the migration.

The stronger the contract, the easier the replacement.

KiwiEngine's Philosophy

Every major component should communicate through predictable contracts.

Not assumptions.

Not hidden dependencies.

Not framework magic.

Contracts create freedom.

Freedom to replace.
Freedom to scale.
Freedom to evolve.

That's the foundation of KiwiEngine.

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