fix(ai): disable hidden provider 429 retries (#4991)

packages/coding-agent/src/core/agent-session.ts

@@ -2422,6 +2422,12 @@ export class AgentSession {
 	// Auto-Retry
 	// =========================================================================
 
+	private _isNonRetryableProviderLimitError(errorMessage: string): boolean {
+		return /GoUsageLimitError|FreeUsageLimitError|Monthly usage limit reached|available balance|insufficient_quota|out of budget|quota exceeded|billing/i.test(
+			errorMessage,
+		);
+	}
+
 	/**
 	 * Check if an error is retryable (overloaded, rate limit, server errors).
 	 * Context overflow errors are NOT retryable (handled by compaction instead).
@@ -2434,6 +2440,7 @@ export class AgentSession {
 		if (isContextOverflow(message, contextWindow)) return false;
 
 		const err = message.errorMessage;
+		if (this._isNonRetryableProviderLimitError(err)) return false;
 		// Match: overloaded_error, provider returned error, rate limit, 429, 500, 502, 503, 504, service unavailable, network/connection errors (including connection lost), WebSocket transport closes/errors, fetch failed, premature stream endings, HTTP/2 closed before response, terminated, retry delay exceeded
 		return /overloaded|provider.?returned.?error|rate.?limit|too many requests|429|500|502|503|504|service.?unavailable|server.?error|internal.?error|network.?error|connection.?error|connection.?refused|connection.?lost|websocket.?closed|websocket.?error|other side closed|fetch failed|upstream.?connect|reset before headers|socket hang up|ended without|stream ended before message_stop|http2 request did not get a response|timed? out|timeout|terminated|retry delay/i.test(
 			err,