fix(embeddings): preserve legacy provider default

Author: TheodoreSpeaks

apps/sim/blocks/blocks.test.ts

@@ -899,13 +899,17 @@ describe.concurrent('Blocks Module', () => {
         // Each provider routes to its own registered tool...
         const toolId = block?.tools.config?.tool?.({ provider })
         expect(block?.tools.access).toContain(toolId)
-        // ...and has a model dropdown with at least one option.
+        // ...and has either a static model list or a dynamic model loader.
         const modelSubBlock = block?.subBlocks.find(
           (sb) => sb.id === 'model' && sb.condition?.value === provider
         )
-        expect(
-          Array.isArray(modelSubBlock?.options) ? modelSubBlock.options.length : 0
-        ).toBeGreaterThan(0)
+        if (provider === 'openrouter') {
+          expect(modelSubBlock?.fetchOptions).toBeTypeOf('function')
+        } else {
+          expect(
+            Array.isArray(modelSubBlock?.options) ? modelSubBlock.options.length : 0
+          ).toBeGreaterThan(0)
+        }
       }
     })
 

apps/sim/blocks/blocks/embeddings.test.ts

@@ -146,6 +146,10 @@ describe('Embeddings block', () => {
       expect(EmbeddingsBlock.tools.config?.tool?.({ provider })).toBe(toolId)
     }
     expect(EmbeddingsBlock.tools.access).toHaveLength(Object.keys(TOOL_ID_BY_PROVIDER).length)
+    expect(EmbeddingsBlock.tools.config?.tool?.({})).toBe('embeddings_openai')
+    expect(() => EmbeddingsBlock.tools.config?.tool?.({ provider: 'unknown' })).toThrow(
+      'Unsupported embedding provider: unknown'
+    )
   })
 
   it('loads every OpenRouter embedding model and maps its dedicated key', async () => {

apps/sim/blocks/blocks/embeddings.ts

@@ -209,7 +209,7 @@ export const EmbeddingsBlock: BlockConfig<EmbeddingsResponse> = {
        * `<Block.output>` references.
        */
       tool: (params) => {
-        const provider = params.provider as EmbeddingBlockProvider
+        const provider = (params.provider as EmbeddingBlockProvider | undefined) ?? 'openai'
         const toolId = TOOL_ID_BY_PROVIDER[provider]
         if (!toolId) throw new Error(`Unsupported embedding provider: ${String(params.provider)}`)
         return toolId