27 lines
997 B
Markdown
27 lines
997 B
Markdown
# 11. Fastify is the API server; React + Vite is the web shell
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- **Status:** Accepted
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- **Date:** 2026-08-15
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## Context
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IMPLEMENTATION §1 names "Express/Fastify" for the backend and "React + TypeScript" for the frontend. Sprint 1 required committing to one server framework before the first route and test.
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## Decision
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Use **Fastify** for `api/`, and **React 19 + Vite + vitest + @testing-library/react** for `web/`.
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### Options considered
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- Express (matches the plan's pseudocode).
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- Fastify (chosen).
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### Rejected
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- Express — the plan allows either; Fastify ships built-in JSON-schema validation, native async handlers, and first-class TypeScript, which removes glue the plan would otherwise write by hand.
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## Consequences
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- Route handlers return via Fastify's `reply` object and validate payloads schema-first (the signup route enforces email format and password length).
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- Future routes should keep using Fastify schema validation at the boundary rather than hand-rolled checks.
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