fix(provider): type model not found errors (#27334)

packages/opencode/test/cli/error.test.ts

@@ -64,6 +64,23 @@ describe("cli.error", () => {
     expect(formatted).toContain("Check your network, proxy, or VPN configuration and try again.")
   })
 
+  test("formats legacy and tagged provider model errors the same way", () => {
+    const data = {
+      providerID: "anthropic",
+      modelID: "claude-sonet-4",
+      suggestions: ["claude-sonnet-4"],
+    }
+    const expected = [
+      "Model not found: anthropic/claude-sonet-4",
+      "Did you mean: claude-sonnet-4",
+      "Try: `opencode models` to list available models",
+      "Or check your config (opencode.json) provider/model names",
+    ].join("\n")
+
+    expect(FormatError({ name: "ProviderModelNotFoundError", data })).toBe(expected)
+    expect(FormatError({ _tag: "ProviderModelNotFoundError", ...data })).toBe(expected)
+  })
+
   test("formats cancelled UI errors as empty output", () => {
     expect(FormatError(new UI.CancelledError())).toBe("")
   })

packages/opencode/test/provider/provider.test.ts

@@ -1572,8 +1572,8 @@ test("ModelNotFoundError includes suggestions for typos", async () => {
         await getModel(ProviderID.anthropic, ModelID.make("claude-sonet-4")) // typo: sonet instead of sonnet
         expect(true).toBe(false) // Should not reach here
       } catch (e: any) {
-        expect(e.data.suggestions).toBeDefined()
-        expect(e.data.suggestions.length).toBeGreaterThan(0)
+        expect(e.suggestions).toBeDefined()
+        expect(e.suggestions.length).toBeGreaterThan(0)
       }
     },
   })
@@ -1598,8 +1598,8 @@ test("ModelNotFoundError for provider includes suggestions", async () => {
         await getModel(ProviderID.make("antropic"), ModelID.make("claude-sonnet-4")) // typo: antropic
         expect(true).toBe(false) // Should not reach here
       } catch (e: any) {
-        expect(e.data.suggestions).toBeDefined()
-        expect(e.data.suggestions).toContain("anthropic")
+        expect(e.suggestions).toBeDefined()
+        expect(e.suggestions).toContain("anthropic")
       }
     },
   })
@@ -1625,7 +1625,7 @@ test("ModelNotFoundError suggests catalog models for unloaded providers", async
         throw new Error("expected model lookup to fail")
       } catch (e) {
         if (!Provider.ModelNotFoundError.isInstance(e)) throw e
-        expect(e.data.suggestions).toContain("claude-haiku-4-5")
+        expect(e.suggestions).toContain("claude-haiku-4-5")
       }
     },
   })