Detach schemas without provider value limits

schema_file_contract_test.go

@@ -80,6 +80,39 @@ func TestSchemaFilePreparationAndNativeSubmission(t *testing.T) {
 	}
 }
 
+func TestSchemaFilePreparationDetachesLargeAnnotation(t *testing.T) {
+	// Annotation values are not constraints; this array exceeds the former
+	// provider-value copier node limit without requiring a large fixture file.
+	const entries = 100_001
+	path := filepath.Join(t.TempDir(), "schema.json")
+	schema := `{"type":"string","examples":[` + strings.Repeat(`0,`, entries-1) + `0]}`
+	if err := os.WriteFile(path, []byte(schema), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	input := configkit.Input{Source: configkit.Mapping("schema test", map[string]any{
+		"profiles": []any{map[string]any{"id": "profile", "endpoint": "https://example.invalid/v1", "model": "model"}},
+		"prompts":  []any{map[string]any{"id": "prompt", "default_profile": "profile", "messages": []any{map[string]any{"role": "user", "content": "hello"}}, "output": map[string]any{"format": "json", "validation_mode": "json_schema", "schema_path": "schema.json"}}},
+	})}
+	engine, err := promptkit.NewEngine(promptkit.Config{Sources: promptkit.ConfigurationSources{Main: &input}}, promptkit.WithSchemaFile(path))
+	if err != nil {
+		t.Fatal(err)
+	}
+	prepared, err := engine.PrepareExecution(context.Background(), promptkit.RunRequest{PromptID: "prompt"})
+	if err != nil {
+		t.Fatalf("prepare large schema: %v", err)
+	}
+	first := prepared.Details().StructuredOutput.JSONSchema.Schema.(map[string]any)
+	examples := first["examples"].([]any)
+	if len(examples) != entries {
+		t.Fatalf("examples = %d, want %d", len(examples), entries)
+	}
+	examples[0] = "changed"
+	second := prepared.Details().StructuredOutput.JSONSchema.Schema.(map[string]any)
+	if _, ok := second["examples"].([]any)[0].(json.Number); !ok {
+		t.Fatal("schema details share mutable annotation values")
+	}
+}
+
 func TestSchemaFileRejectsInvalidSourcesAndExternalReferences(t *testing.T) {
 	dir := t.TempDir()
 	for _, name := range []string{filepath.Join(dir, "missing.json"), dir} {