@@ -155,6 +155,7 @@ describe("fallback-state", () => {
155155fallbackNoticeActiveModel: "claude-cli/claude-opus-4-7",
156156fallbackNoticeReason: "selected model unavailable",
157157},
158+cfg: {},
158159});
159160160161expect(resolved.fallbackActive).toBe(false);
@@ -164,6 +165,47 @@ describe("fallback-state", () => {
164165expect(resolved.nextState.activeModel).toBeUndefined();
165166});
166167168+it("does not repeat runtime alias comparison when persisted fallback refs match", () => {
169+let setupBackendLookups = 0;
170+cliBackendsTesting.setDepsForTest({
171+resolvePluginSetupCliBackend: ({ backend }) => {
172+setupBackendLookups += 1;
173+return backend === "claude-cli"
174+ ? {
175+pluginId: "anthropic",
176+backend: {
177+id: "claude-cli",
178+modelProvider: "anthropic",
179+config: { command: "claude" },
180+bundleMcp: false,
181+},
182+}
183+ : undefined;
184+},
185+resolvePluginSetupRegistry: () => {
186+throw new Error("full setup registry should not load for a single runtime alias");
187+},
188+resolveRuntimeCliBackends: () => [],
189+});
190+191+const resolved = resolveFallbackTransition({
192+selectedProvider: "anthropic",
193+selectedModel: "claude-opus-4-7",
194+activeProvider: "claude-cli",
195+activeModel: "claude-opus-4-7",
196+attempts: [],
197+state: {
198+fallbackNoticeSelectedModel: "anthropic/claude-opus-4-7",
199+fallbackNoticeActiveModel: "claude-cli/claude-opus-4-7",
200+fallbackNoticeReason: "selected model unavailable",
201+},
202+cfg: {},
203+});
204+205+expect(resolved.fallbackActive).toBe(false);
206+expect(setupBackendLookups).toBe(2);
207+});
208+167209it("does not build a fallback notice for equivalent CLI runtime aliases", () => {
168210registerAnthropicCliBackendForTest();
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