gitsocial serve [--addr 127.0.0.1:<port>] [--open]. Start the localbucket handler on loopback, add the serve remote to the process environment only (GIT_CONFIG_* entries, no git config writes), push with client.Push, and serve the site app from the bucket root at <cache-dir>/serve/<urlHash>/. No HTML pages, also with pages true. Open to decide: a fixed default port (proposal 4747) or an ephemeral one, and keep --open or not. Design: .local/design/serve.md.