Architecture Overview #

Software Graph models software systems as directed graphs.

Each node represents a service or component.

Each edge represents a dependency.

Node Types #

Nodes may represent:

• Backend services (OpenAPI-based)
• Frontend applications
• Internal libraries
• Data stores
• Auth providers

Not all nodes expose OpenAPI contracts.
Only network boundaries require formal API contracts.

Edge Semantics #

Edges are directional.

If Service A depends on Service B:

A → B

A consumes B’s contract.

When B changes, A may require modification.

Edges define propagation paths.

Dual Mesh Model #

Two parallel meshes exist:

• Dev Mesh
• Prod Mesh

Changes are introduced into Dev Mesh.

Propagation, validation, and testing occur.

Only validated graphs are promoted to Prod Mesh.

Deterministic Evolution #

Architecture changes follow a deterministic sequence:

1. Contract mutation
2. Dependency traversal
3. Subgraph fork
4. Code adaptation
5. Test execution
6. Coverage validation
7. Promotion decision

Software evolution becomes structured rather than reactive.

Example Service Graph #