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What an API Contract Is and Who It Is For

This generated surface maps a learner-facing curriculum unit to its canonical source routes.

Curriculum surface​

  • Open learner-facing unit
  • Curriculum path: content/curriculum/architecture/semester-07-architecture-ddd/module-04-api-design-contract-evolution/concepts/cluster-01-api-as-a-product/01-what-an-api-contract-is-and-who-it-is-for-primary.md
  • App: architecture
  • Semester: semester-07-architecture-ddd
  • Module: module-04-api-design-contract-evolution
  • Unit kind: concept
  • Curation level: module_curated

Learning objectives​

  • Explain What an API Contract Is and Who It Is For as a contract and evolution problem, not just an endpoint-shape or schema-format decision.
  • Use What an API Contract Is and Who It Is For to reason about compatibility, versioning, lifecycle cost, and the blast radius of public interfaces.
  • Use api-design-patterns, fundamentals-of-software-architecture to connect the learner page to contract design, compatibility strategy, and API governance decisions.

Prerequisites​

  • Comfort with modular boundaries and bounded contexts, because APIs are where those boundaries become explicit contracts.

Source books​

  • api-design-patterns
  • fundamentals-of-software-architecture

Source routes​

Api Design Patterns​

  • /books/api-design-patterns via Geewax: What are API design patterns?, Geewax: What are resource-oriented APIs?, Geewax: What are web APIs?

Fundamentals Of Software Architecture​

Supporting curriculum routes​

No supporting curriculum routes linked yet.

External enrichment​

  • Microsoft REST API Guidelines (official_docs_companion) - Anchors API contract thinking in a real, widely used design standard rather than intuition.
  • Zalando RESTful API Guidelines (optional_deep_dive) - Useful for comparing how different organizations encode compatibility and lifecycle tradeoffs.

AI companion modes​

  • Explain simply
  • Socratic tutor
  • Challenge my understanding
  • Diagnose my confusion
  • Connect forward / backward

Source-of-truth note​

This teaching unit is learner-facing guidance assembled from multiple canonical book routes. Use the listed source books as the primary conceptual spine for What an API Contract Is and Who It Is For, and treat outside material as supporting enrichment only.