fastify/fastify

The runtime centers on a factory exported as a CommonJS package, with separate TypeScript declarations. Fastify assembles transport, routing, request/reply behavior, and plugin boot rather than supplying a fixed application. Mutable facilities are scoped through plugin inheritance and symbol-keyed state. Database integrations belong to application plugins, while repository workflows exercise packaging and compatibility.

• package.json declares fastify.js as main, commonjs as module type, fastify.d.ts as declarations, and version 6.0.0-alpha.4.
  package.json#L1-7
• fastify() calls processOptions, buildRouting, build404, wrapRouting, createServer, and buildSchemaController to assemble an instance.
  fastify.js#L89-117
• The root owns symbol-keyed lifecycle state, child instances, hooks, parser configuration, and scoped Request/Reply constructors.
  fastify.js#L120-176
• Avvio is configured with autostart false and use exposed as register; Fastify installs its encapsulation override and replaces ready.
  fastify.js#L359-380
• getServerInstance selects a custom serverFactory, HTTP/2 secure or plain server, or HTTP/1 HTTPS/HTTP server.
  lib/server.js#L308-347
• Default schema compiler factories are loaded from @fastify/ajv-compiler and @fastify/fast-json-stringify-compiler.
  lib/schema-controller.js#L16-35package.json#L205-220
• The database guide explicitly describes Fastify as database agnostic and demonstrates separately registered database plugins.
  docs/Guides/Database.md#L5-16docs/Guides/Database.md#L24-38
• Repository commands separate lint, borp unit tests, TSTyche type tests, generated-code integrity, and prepublication checks.
  package.json#L13-30