Introduces Aturi's third top-level product: a navigable PDS browser at /explore that walks any account's collections, identity history, audit log, and backlinks, with OAuth-gated record editing for one's own repo. The extension popup grows a second tab that detects AT URIs on the current page and exposes underlying data plus copy/open tools. Shared protocol layer lives in src/utils/atproto/ (pure fetch, no SDK, isomorphic), so the same modules drive the web app, server-side metadata generation, and the extension's Inspect tab. https://claude.ai/code/session_012r2GyRE12vBhofZQrMdLtS