Implementation sub-skill: Backend

Builds the API and business logic against the schema database-implementation just created. The second of implementation's four sub-skills.

Claude CodeLast reviewed September 3, 2026

In one minute

A sub-skill of Implementation, invoked second of its four, after Database.
Reads docs/product/definition.md for which features to build, and the migrations the previous sub-skill wrote for how to build them.
Writes tests alongside the code it produces, rather than treating tests as a separate, later pass, since Validation and testing checks the whole product later, not each piece as it is built.

SKILL.md

.claude/skills/backend-implementation/SKILL.md

---
name: backend-implementation
description: Builds the API and business logic against the schema database-implementation created. Use as the second of implementation's four sub-skills, invoked by /implementation, after the schema exists.
---
Read docs/product/definition.md for the core features, and the migrations database-implementation wrote for the schema.

Build the API endpoints and business logic the frontend will call.

Write tests alongside the code, not as a separate later pass.

Where it fits

Invoked by Implementation, second of its four sub-skills, after Database. Hands off to Frontend, which builds against the API this skill exposes.

Last reviewed September 3, 2026

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