feat(gateway)!: switch handshake to req:connect (protocol v2)

scripts/protocol-gen-swift.ts

@@ -146,11 +146,8 @@ function emitStruct(name: string, schema: JsonSchema): string {
 }
 
 function emitGatewayFrame(): string {
-  const cases = ["hello", "hello-ok", "hello-error", "req", "res", "event"];
+  const cases = ["req", "res", "event"];
   const associated: Record<string, string> = {
-    hello: "Hello",
-    "hello-ok": "HelloOk",
-    "hello-error": "HelloError",
     req: "RequestFrame",
     res: "ResponseFrame",
     event: "EventFrame",
@@ -165,12 +162,6 @@ function emitGatewayFrame(): string {
         let typeContainer = try decoder.container(keyedBy: CodingKeys.self)
         let type = try typeContainer.decode(String.self, forKey: .type)
         switch type {
-        case "hello":
-            self = .hello(try Hello(from: decoder))
-        case "hello-ok":
-            self = .helloOk(try HelloOk(from: decoder))
-        case "hello-error":
-            self = .helloError(try HelloError(from: decoder))
         case "req":
             self = .req(try RequestFrame(from: decoder))
         case "res":
@@ -186,9 +177,6 @@ function emitGatewayFrame(): string {
 
     public func encode(to encoder: Encoder) throws {
         switch self {
-        case .hello(let v): try v.encode(to: encoder)
-        case .helloOk(let v): try v.encode(to: encoder)
-        case .helloError(let v): try v.encode(to: encoder)
         case .req(let v): try v.encode(to: encoder)
         case .res(let v): try v.encode(to: encoder)
         case .event(let v): try v.encode(to: encoder)

scripts/protocol-gen.ts

@@ -18,9 +18,6 @@ async function writeJsonSchema() {
     title: "Clawdis Gateway Protocol",
     description: "Handshake, request/response, and event frames for the Gateway WebSocket.",
     oneOf: [
-      { $ref: "#/definitions/Hello" },
-      { $ref: "#/definitions/HelloOk" },
-      { $ref: "#/definitions/HelloError" },
       { $ref: "#/definitions/RequestFrame" },
       { $ref: "#/definitions/ResponseFrame" },
       { $ref: "#/definitions/EventFrame" },
@@ -28,9 +25,6 @@ async function writeJsonSchema() {
     discriminator: {
       propertyName: "type",
       mapping: {
-        hello: "#/definitions/Hello",
-        "hello-ok": "#/definitions/HelloOk",
-        "hello-error": "#/definitions/HelloError",
         req: "#/definitions/RequestFrame",
         res: "#/definitions/ResponseFrame",
         event: "#/definitions/EventFrame",