fallback changes from PR #35

src/fallback-config.js

@@ -0,0 +1,36 @@
+/**
+ * Model Fallback Configuration
+ * 
+ * Defines fallback mappings for when a model's quota is exhausted across all accounts.
+ * Enables graceful degradation to alternative models with similar capabilities.
+ */
+
+/**
+ * Model fallback mapping
+ * Maps primary model ID to fallback model ID
+ */
+export const MODEL_FALLBACK_MAP = {
+    'gemini-3-pro-high': 'claude-sonnet-4-5-thinking',
+    'gemini-3-pro-low': 'claude-sonnet-4-5',
+    'claude-opus-4-5-thinking': 'gemini-3-pro-high',
+    'claude-sonnet-4-5-thinking': 'gemini-3-pro-high',
+    'claude-sonnet-4-5': 'gemini-3-pro-low'
+};
+
+/**
+ * Get fallback model for a given model ID
+ * @param {string} model - Primary model ID
+ * @returns {string|null} Fallback model ID or null if no fallback exists
+ */
+export function getFallbackModel(model) {
+    return MODEL_FALLBACK_MAP[model] || null;
+}
+
+/**
+ * Check if a model has a fallback configured
+ * @param {string} model - Model ID to check
+ * @returns {boolean} True if fallback exists
+ */
+export function hasFallback(model) {
+    return model in MODEL_FALLBACK_MAP;
+}