group modules by AT Protocol domain boundaries (following bluesky-social/indigo): syntax/ — string primitives (did, handle, nsid, tid, rkey, at_uri) crypto/ — jwt, multibase, multicodec identity/ — did_document, did_resolver, handle_resolver repo/ — cbor, car, mst xrpc/ — transport, xrpc client, json helpers streaming/ — firehose, jetstream, sync testing/ — interop tests Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>