Spike: PTY-based Claude Code integration with multi-agent concurrency

Proves that spawning `claude -p` in a pseudo-terminal from Rust gets Max
subscription billing (apiKeySource: "none", rateLimitType: "five_hour")
instead of per-token API charges. Concurrent agents run in parallel PTY
sessions with session resumption via --resume for multi-turn conversations.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/api/client.ts

@@ -226,7 +226,7 @@ export class ChatWebSocket {
 
 		const protocol = window.location.protocol === "https:" ? "wss" : "ws";
 		const wsHost = import.meta.env.DEV
-			? "127.0.0.1:3001"
+			? "127.0.0.1:3002"
 			: window.location.host;
 		const wsUrl = `${protocol}://${wsHost}${wsPath}`;
 

frontend/src/components/Chat.tsx

@@ -406,7 +406,8 @@ export function Chat({ projectPath, onCloseProject }: ChatProps) {
 		const messageToSend = messageOverride ?? input;
 		if (!messageToSend.trim() || loading) return;
 
-		if (model.startsWith("claude-")) {
+		const isClaudeCode = model === "claude-code-pty";
+		if (!isClaudeCode && model.startsWith("claude-")) {
 			const hasKey = await api.getAnthropicApiKeyExists();
 			if (!hasKey) {
 				pendingMessageRef.current = messageToSend;
@@ -426,8 +427,13 @@ export function Chat({ projectPath, onCloseProject }: ChatProps) {
 		setStreamingContent("");
 
 		try {
+			const provider = isClaudeCode
+				? "claude-code"
+				: model.startsWith("claude-")
+					? "anthropic"
+					: "ollama";
 			const config: ProviderConfig = {
-				provider: model.startsWith("claude-") ? "anthropic" : "ollama",
+				provider,
 				model,
 				base_url: "http://localhost:11434",
 				enable_tools: enableTools,

frontend/src/components/ChatHeader.tsx

@@ -175,6 +175,11 @@ export function ChatHeader({
 							backgroundSize: "10px",
 						}}
 					>
+						<optgroup label="Claude Code (PTY)">
+							<option value="claude-code-pty">
+								claude-code-pty
+							</option>
+						</optgroup>
 						{(claudeModels.length > 0 || !hasAnthropicKey) && (
 							<optgroup label="Anthropic">
 								{claudeModels.length > 0 ? (

frontend/vite.config.ts

@@ -5,8 +5,9 @@ import { defineConfig } from "vite";
 export default defineConfig(() => ({
   plugins: [react()],
   server: {
+    port: 5174,
     proxy: {
-      "/api": "http://127.0.0.1:3001",
+      "/api": "http://127.0.0.1:3002",
     },
   },
   build: {