fix(providers): keep the settings provider selection under one owner

The selected provider on the Providers settings page shared a field with
the chat's model resolution. Changing the chat model or agent, and
`loadAgents` reconciling a selection, all wrote to it, so the page jumped
to an unrelated provider while the user was reading or editing one.

Only the sidebar click writes it now. A refresh no longer re-derives it
either: a provider missing from a refreshed list is expected while
OpenCode restarts and plugin-registered providers re-register.

packages/ui/src/stores/useConfigStore.test.ts

@@ -405,6 +405,60 @@ describe('useConfigStore provider persistence', () => {
     expect(state.currentVariant).toBe('fast');
   });
 
+  test('the settings provider selection survives a refresh that no longer lists it', async () => {
+    // Plugin-registered providers vanish from the list while OpenCode restarts.
+    // A refresh in that window used to move the user to another provider while
+    // they were reading or editing the one they picked.
+    useConfigStore.setState({
+      activeDirectoryKey: DIRECTORY,
+      currentProviderId: 'live',
+      currentModelId: 'live-model',
+      selectedProviderId: 'plugin-provider',
+      directoryScoped: {},
+    });
+
+    liveProviderId = 'live';
+    await useConfigStore.getState().loadProviders({ source: 'test:missing-selection' });
+
+    const state = useConfigStore.getState();
+    expect(state.providers.map((entry) => entry.id)).toEqual(['live']);
+    expect(state.selectedProviderId).toBe('plugin-provider');
+    expect(state.directoryScoped[DIRECTORY]?.selectedProviderId).toBe('plugin-provider');
+  });
+
+  test('an empty settings provider selection is filled from the refreshed list', async () => {
+    useConfigStore.setState({
+      activeDirectoryKey: DIRECTORY,
+      currentProviderId: '',
+      currentModelId: '',
+      selectedProviderId: '',
+      directoryScoped: {},
+    });
+
+    liveProviderId = 'live';
+    await useConfigStore.getState().loadProviders({ source: 'test:empty-selection' });
+
+    expect(useConfigStore.getState().selectedProviderId).toBe('live');
+  });
+
+  test('changing the chat provider leaves the settings provider selection alone', async () => {
+    useConfigStore.setState({
+      activeDirectoryKey: DIRECTORY,
+      providers: [provider('anthropic'), provider('openai')],
+      currentProviderId: 'anthropic',
+      currentModelId: 'anthropic-model',
+      selectedProviderId: 'openai',
+      directoryScoped: {},
+    });
+
+    useConfigStore.getState().setProvider('anthropic');
+
+    const state = useConfigStore.getState();
+    expect(state.currentProviderId).toBe('anthropic');
+    expect(state.selectedProviderId).toBe('openai');
+    expect(state.directoryScoped[DIRECTORY]?.selectedProviderId).toBe('openai');
+  });
+
   test('provider reload preserves the add-provider sentinel selection', async () => {
     // The user has opened the "Add provider" form, which sets selectedProviderId
     // to the sentinel. A background provider refresh must not navigate them away

packages/ui/src/stores/useConfigStore.ts

@@ -187,10 +187,6 @@ const sanitizePersistedSelectedProviderId = (providerId: string | undefined): st
     providerId === ADD_PROVIDER_SENTINEL ? "" : (providerId ?? "")
 );
 
-const preserveAddProviderSelection = (currentSelectedProviderId: string | undefined, nextProviderId: string): string => (
-    currentSelectedProviderId === ADD_PROVIDER_SENTINEL ? ADD_PROVIDER_SENTINEL : nextProviderId
-);
-
 const normalizeOptionalString = (value: unknown): string | undefined => {
     if (typeof value !== "string") {
         return undefined;
@@ -1609,10 +1605,13 @@ export const useConfigStore = create<ConfigStore>()(
                                 const currentSelectedProviderId = state.activeDirectoryKey === directoryKey
                                     ? state.selectedProviderId
                                     : baseSnapshot.selectedProviderId;
-                                // Preserve the add-provider sentinel so a background refresh does not
+                                // The Providers settings selection belongs to the user, not to this
-                                // navigate the user out of the in-progress add-provider form (issue #1765).
+                                // loader. A refresh may report a different provider set — an OpenCode
-                                const selectedProviderId = currentSelectedProviderId === ADD_PROVIDER_SENTINEL
+                                // restart drops plugin-registered providers until they re-register —
-                                    || processedProviders.some((provider) => provider.id === currentSelectedProviderId)
+                                // and re-deriving a selection here yanked the open provider away
+                                // mid-edit. Keep whatever is selected; only fill in an empty one.
+                                // The add-provider sentinel is kept for the same reason (issue #1765).
+                                const selectedProviderId = currentSelectedProviderId
                                     ? currentSelectedProviderId
                                     : (resolvedModel?.providerId ?? processedProviders[0]?.id ?? "");
 
@@ -1723,12 +1722,17 @@ export const useConfigStore = create<ConfigStore>()(
                                         nextState.currentProviderId = parsed.providerId;
                                         nextState.currentModelId = parsed.modelId;
                                         nextState.currentVariant = currentVariant;
-                                        nextState.selectedProviderId = parsed.providerId;
 
                                         nextSnapshot.currentProviderId = parsed.providerId;
                                         nextSnapshot.currentModelId = parsed.modelId;
                                         nextSnapshot.currentVariant = currentVariant;
-                                        nextSnapshot.selectedProviderId = parsed.providerId;
+
+                                        // Only adopt this as the settings selection when the user has
+                                        // none; a failed refresh must not move an existing one.
+                                        if (!state.selectedProviderId) {
+                                            nextState.selectedProviderId = parsed.providerId;
+                                            nextSnapshot.selectedProviderId = parsed.providerId;
+                                        }
                                     }
                                 }
                             }
@@ -1771,14 +1775,12 @@ export const useConfigStore = create<ConfigStore>()(
                             ...baseSnapshot,
                             currentProviderId: providerId,
                             currentModelId: newModelId,
-                            selectedProviderId: providerId,
                             selectionSource: "manual",
                         };
 
                         return {
                             currentProviderId: providerId,
                             currentModelId: newModelId,
-                            selectedProviderId: providerId,
                             selectionSource: "manual",
                             directoryScoped: {
                                 ...state.directoryScoped,
@@ -2456,7 +2458,6 @@ export const useConfigStore = create<ConfigStore>()(
                                     currentProviderId: providerId,
                                     currentModelId: modelId,
                                     currentVariant: variant,
-                                    selectedProviderId: preserveAddProviderSelection(state.selectedProviderId, providerId),
                                     selectionSource: "manual",
                                 };
 
@@ -2464,7 +2465,6 @@ export const useConfigStore = create<ConfigStore>()(
                                     currentProviderId: providerId,
                                     currentModelId: modelId,
                                     currentVariant: variant,
-                                    selectedProviderId: preserveAddProviderSelection(state.selectedProviderId, providerId),
                                     selectionSource: "manual",
                                     directoryScoped: {
                                         ...state.directoryScoped,
@@ -2616,7 +2616,6 @@ export const useConfigStore = create<ConfigStore>()(
                                     currentProviderId: resolvedProviderId,
                                     currentModelId: resolvedModelId,
                                     currentVariant: resolvedVariant,
-                                    selectedProviderId: preserveAddProviderSelection(state.selectedProviderId, resolvedProviderId),
                                 }
                                 : {}),
                             selectionSource: "auto",
@@ -2635,7 +2634,6 @@ export const useConfigStore = create<ConfigStore>()(
                             nextState.currentProviderId = resolvedProviderId;
                             nextState.currentModelId = resolvedModelId;
                             nextState.currentVariant = resolvedVariant;
-                            nextState.selectedProviderId = preserveAddProviderSelection(state.selectedProviderId, resolvedProviderId);
                         }
 
                         return nextState;
@@ -2717,7 +2715,6 @@ export const useConfigStore = create<ConfigStore>()(
                         const currentProviderId = isActive ? state.currentProviderId : baseSnapshot.currentProviderId;
                         const currentModelId = isActive ? state.currentModelId : baseSnapshot.currentModelId;
                         const currentVariant = isActive ? state.currentVariant : baseSnapshot.currentVariant;
-                        const currentSelectedProviderId = isActive ? state.selectedProviderId : baseSnapshot.selectedProviderId;
                         const nextSelection = resolveSelectionWithManualGuard({
                             agents,
                             providers,
@@ -2742,7 +2739,6 @@ export const useConfigStore = create<ConfigStore>()(
                                     currentProviderId: nextSelection.providerId,
                                     currentModelId: nextSelection.modelId,
                                     currentVariant: nextSelection.variant,
-                                    selectedProviderId: preserveAddProviderSelection(currentSelectedProviderId, nextSelection.providerId),
                                 }
                                 : {}),
                             selectionSource: nextSelection.selectionSource,
@@ -2761,7 +2757,6 @@ export const useConfigStore = create<ConfigStore>()(
                                     state.currentProviderId !== nextSelection.providerId
                                     || state.currentModelId !== nextSelection.modelId
                                     || state.currentVariant !== nextSelection.variant
-                                    || state.selectedProviderId !== preserveAddProviderSelection(currentSelectedProviderId, nextSelection.providerId)
                                 ))
                             ));
 
@@ -2781,7 +2776,6 @@ export const useConfigStore = create<ConfigStore>()(
                                 nextState.currentProviderId = nextSelection.providerId;
                                 nextState.currentModelId = nextSelection.modelId;
                                 nextState.currentVariant = nextSelection.variant;
-                                nextState.selectedProviderId = preserveAddProviderSelection(currentSelectedProviderId, nextSelection.providerId);
                             }
                         }