agent
3d9b4ce392
First half of the browser-native bus SDK (issue 0001, Phase 1): - crypto.ts: Ed25519 sign/verify (@noble), ChaCha20-Poly1305 AEAD (@noble), endpoint id (sha256+base64url), and the anonymous sealed box for room-key distribution. The sealed-box nonce is BLAKE2b-192 over ephPub||recipientPub, matching Go's nacl/box.SealAnonymous (NOT SHA-512) so a Go-sealed key opens here. - frame.ts: the Frame wire format, reproducing Go encoding/json byte-for-byte — struct field order, omitempty rules, base64-std byte fields, and the default HTML escaping (<, >, &, U+2028/U+2029) — plus sign/verify over canonical bytes. vectors.test.ts checks all of it against the golden vectors generated by unibus cmd/busvectors. 11/11 green: endpoint id, Ed25519 (incl. frame signature), AEAD seal+open, sealed box open + round-trip, and frame signing-bytes + wire marshal. This pins cross-language interop with Go/Kotlin peers. Adds @noble/ciphers, tweetnacl (runtime) and vitest (dev).