go-app is a Go framework for building progressive web applications entirely in Go via WebAssembly. The core package pkg/app implements a declarative component model (Composer/Compo) with lifecycle hooks, client-side routing, state management with observers and persistence, server-side pre-rendering, and a full PWA HTTP handler that serves the app shell, service worker, manifest, and static resources. The docs/ directory is itself a production go-app PWA that dogfoods the framework; docs/src contains the documentation site source code, and docs/web/documents contains the markdown content rendered at runtime by the wasm binary. Architecturally, the repository is a layered Go library rather than a monolith or microservice. pkg/app contains the runtime engine (engine.go, node.go, state.go, http.go) and uses build tags to separate server-side resource/HTTP handling from client-side wasm UI execution. pkg/cli is a struct-tag-driven CLI and environment configuration loader, pkg/cache provides reusable LRU and expiring cache implementations, pkg/errors adds typed and tagged error wrapping, and pkg/logs and pkg/analytics provide optional support utilities. Code generation in pkg/app/gen/html.go produces the strongly typed HTML element API and its generated tests. The primary data flow begins with Go component state and user events, which are dispatched through the engine and Context API to update the DOM via the node manager. State mutations can be persisted to localStorage, encrypted, and broadcast across browser tabs. On the server side, the Handler serves pre-rendered HTML, resolves static resources (local dirs, remote buckets, GitHub Pages), and caches proxied resources. External dependencies include Go modules for webpush, markdown parsing, UUID, and testing, plus browser APIs and Go's wasm_exec.js glue. There are no data pipelines, notebooks, or research artifacts; this is a pure application/framework repository.