Fix slow /model selector by deferring OAuth token refresh

getAvailable() now uses hasAuth() which checks if auth is configured
without triggering OAuth token refresh. Refresh happens later when
the model is actually used.

packages/coding-agent/CHANGELOG.md

@@ -38,6 +38,7 @@
 
 ### Fixed
 
+- `/model` selector now opens instantly instead of waiting for OAuth token refresh. Token refresh is deferred until a model is actually used.
 - Shift+Space, Shift+Backspace, and Shift+Delete now work correctly in Kitty-protocol terminals (Kitty, WezTerm, etc.) instead of being silently ignored ([#411](https://github.com/badlogic/pi-mono/pull/411) by [@nathyong](https://github.com/nathyong))
 - `AgentSession.prompt()` now throws if called while the agent is already streaming, preventing race conditions. Use `steer()` or `followUp()` to queue messages during streaming.
 - Ctrl+C now works like Escape in selector components, so mashing Ctrl+C will eventually close the program ([#400](https://github.com/badlogic/pi-mono/pull/400) by [@mitsuhiko](https://github.com/mitsuhiko))

packages/coding-agent/src/core/auth-storage.ts

@@ -122,12 +122,24 @@ export class AuthStorage {
 	}
 
 	/**
-	 * Check if credentials exist for a provider.
+	 * Check if credentials exist for a provider in auth.json.
 	 */
 	has(provider: string): boolean {
 		return provider in this.data;
 	}
 
+	/**
+	 * Check if any form of auth is configured for a provider.
+	 * Unlike getApiKey(), this doesn't refresh OAuth tokens.
+	 */
+	hasAuth(provider: string): boolean {
+		if (this.runtimeOverrides.has(provider)) return true;
+		if (this.data[provider]) return true;
+		if (getEnvApiKey(provider)) return true;
+		if (this.fallbackResolver?.(provider)) return true;
+		return false;
+	}
+
 	/**
 	 * Get all credentials (for passing to getOAuthApiKey).
 	 */

packages/coding-agent/src/core/model-registry.ts

@@ -350,17 +350,11 @@ export class ModelRegistry {
 	}
 
 	/**
-	 * Get only models that have valid API keys available.
+	 * Get only models that have auth configured.
+	 * This is a fast check that doesn't refresh OAuth tokens.
 	 */
-	async getAvailable(): Promise<Model<Api>[]> {
-		const available: Model<Api>[] = [];
-		for (const model of this.models) {
-			const apiKey = await this.authStorage.getApiKey(model.provider);
-			if (apiKey) {
-				available.push(model);
-			}
-		}
-		return available;
+	getAvailable(): Model<Api>[] {
+		return this.models.filter((m) => this.authStorage.hasAuth(m.provider));
 	}
 
 	/**