Product and architecture guides

These guides are published on the documentation site under the same paths; for example, application/tutorial/README.md is /guides/application/tutorial/. The SDK contributor guide describes workspace commands.

Code blocks tagged docs-test are checked against the pinned SDK snapshot by tests/guide-snippets.test.mjs; every block in a quickstart guide must be tagged. Shared build commands and ownership come from the root contributor guide. Translations owns its versioned schemas and protocol inputs in its repository.