# Build Apps

URL: /chirp/docs/build-apps/
Section: build-apps
Tags: build, pages, fragments, forms, streaming, middleware

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Use this section when you are shaping the application surface: URLs, page directories, named template blocks, form mutations, streaming updates, shell UI, and middleware around requests. Git Branch Pages and Navigation Routes, filesystem pages, route metadata, mounting, and request/response basics. HTML Fragments Templates, named blocks, Page, Fragment, OOB swaps, and Kida integration. Forms and Data Form parsing, validation, query helpers, migrations, and optional data extras. Streaming and Updates Stream, Suspense, EventStream, SSE patterns, and reactive updates. Wrench UI and Extensions Shells, accessibility, Alpine, chirp-ui, islands, and tools. Settings Request Pipeline Middleware for CORS, static files, sessions, auth, CSRF, and custom pipelines.

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- Word Count: 101
- Reading Time: 1 minutes