Contract Model #

Contracts are first-class graph artifacts.

OpenAPI as Truth #

Backend services expose OpenAPI specifications.

These specifications define:

• Request schemas
• Response schemas
• Authentication requirements
• Error contracts

Contracts are versioned.

Contract Mutation #

When a contract changes:

• The graph is updated.
• Downstream nodes are evaluated.
• A propagation sequence begins.

Non-OpenAPI Nodes #

Not all nodes expose OpenAPI.

Frontend-only components and internal libraries may not.

However, dependency edges still exist.

Contracts are required only at network boundaries.

Long-Term Vision #

Contracts may eventually:

• Be auto-generated.
• Be machine-validated against implementation.
• Drive automated code transformation.
• Trigger documentation updates.

The contract is the system boundary.

Contract Mutation Lifecycle #