refactor(transformations): simplify schema inheritance and split files

apps/whispering/src/lib/services/db/models/index.ts

@@ -20,16 +20,12 @@ export {
 	TransformationStepRunFailed,
 	TransformationStepRunRunning,
 } from './transformation-runs';
-export type {
-	TransformationStepV1,
-	TransformationStepV2,
-	TransformationV1,
-	TransformationV2,
-} from './transformations';
-// Transformations
+// Transformation Steps
+export type { TransformationStepV1, TransformationStepV2 } from './transformation-steps';
 export {
-	generateDefaultTransformation,
 	generateDefaultTransformationStep,
-	Transformation,
 	TransformationStep,
-} from './transformations';
+} from './transformation-steps';
+// Transformations
+export type { TransformationV1, TransformationV2 } from './transformations';
+export { generateDefaultTransformation, Transformation } from './transformations';

apps/whispering/src/lib/services/db/models/transformation-steps.ts

@@ -0,0 +1,136 @@
+import { type } from 'arktype';
+import { nanoid } from 'nanoid/non-secure';
+import { TRANSFORMATION_STEP_TYPES } from '$lib/constants/database';
+import {
+	ANTHROPIC_INFERENCE_MODELS,
+	GOOGLE_INFERENCE_MODELS,
+	GROQ_INFERENCE_MODELS,
+	INFERENCE_PROVIDER_IDS,
+	OPENAI_INFERENCE_MODELS,
+} from '$lib/constants/inference';
+
+/**
+ * The current version of the TransformationStep schema.
+ * Increment this when adding new fields or making breaking changes.
+ */
+const CURRENT_TRANSFORMATION_STEP_VERSION = 2 as const;
+
+// ============================================================================
+// VERSION 1 (FROZEN)
+// ============================================================================
+
+/**
+ * V1: Original schema without Custom provider fields.
+ * Old data has no version field, so we default to 1.
+ *
+ * FROZEN: Do not modify. This represents the historical V1 schema.
+ */
+export const TransformationStepV1 = type({
+	id: 'string',
+	type: type.enumerated(...TRANSFORMATION_STEP_TYPES),
+	'prompt_transform.inference.provider': type.enumerated(
+		...INFERENCE_PROVIDER_IDS,
+	),
+	'prompt_transform.inference.provider.OpenAI.model': type.enumerated(
+		...OPENAI_INFERENCE_MODELS,
+	),
+	'prompt_transform.inference.provider.Groq.model': type.enumerated(
+		...GROQ_INFERENCE_MODELS,
+	),
+	'prompt_transform.inference.provider.Anthropic.model': type.enumerated(
+		...ANTHROPIC_INFERENCE_MODELS,
+	),
+	'prompt_transform.inference.provider.Google.model': type.enumerated(
+		...GOOGLE_INFERENCE_MODELS,
+	),
+	// OpenRouter model is a free string (user can enter any model)
+	'prompt_transform.inference.provider.OpenRouter.model': 'string',
+	'prompt_transform.systemPromptTemplate': 'string',
+	'prompt_transform.userPromptTemplate': 'string',
+	'find_replace.findText': 'string',
+	'find_replace.replaceText': 'string',
+	'find_replace.useRegex': 'boolean',
+	version: '1 = 1',
+});
+
+export type TransformationStepV1 = typeof TransformationStepV1.infer;
+
+// ============================================================================
+// VERSION 2 (CURRENT)
+// ============================================================================
+
+/**
+ * V2: Added Custom provider fields for local LLM endpoints.
+ * Extends V1 with:
+ * - Custom.model: Model name for custom endpoints
+ * - Custom.baseUrl: Per-step base URL (falls back to global setting)
+ *
+ * CURRENT VERSION: This is the latest schema.
+ */
+export const TransformationStepV2 = TransformationStepV1.merge({
+	version: '2',
+	/** Custom provider for local LLM endpoints (Ollama, LM Studio, llama.cpp, etc.) */
+	'prompt_transform.inference.provider.Custom.model': 'string',
+	/**
+	 * Per-step base URL for custom endpoints. Allows different steps to use
+	 * different local services (e.g., Ollama on :11434, LM Studio on :1234).
+	 * Falls back to global `completion.Custom.baseUrl` setting if empty.
+	 */
+	'prompt_transform.inference.provider.Custom.baseUrl': 'string',
+});
+
+export type TransformationStepV2 = typeof TransformationStepV2.infer;
+
+// ============================================================================
+// MIGRATING VALIDATOR
+// ============================================================================
+
+/**
+ * TransformationStep validator with automatic migration.
+ * Accepts V1 or V2 and always outputs V2.
+ */
+export const TransformationStep = TransformationStepV1.or(
+	TransformationStepV2,
+).pipe((step): TransformationStepV2 => {
+	if (step.version === 1) {
+		return {
+			...step,
+			version: 2,
+			'prompt_transform.inference.provider.Custom.model': '',
+			'prompt_transform.inference.provider.Custom.baseUrl': '',
+		};
+	}
+	return step;
+});
+
+export type TransformationStep = TransformationStepV2;
+
+// ============================================================================
+// FACTORY FUNCTION
+// ============================================================================
+
+export function generateDefaultTransformationStep(): TransformationStep {
+	return {
+		version: CURRENT_TRANSFORMATION_STEP_VERSION,
+		id: nanoid(),
+		type: 'prompt_transform',
+		'prompt_transform.inference.provider': 'Google',
+		'prompt_transform.inference.provider.OpenAI.model': 'gpt-4o',
+		'prompt_transform.inference.provider.Groq.model': 'llama-3.3-70b-versatile',
+		'prompt_transform.inference.provider.Anthropic.model': 'claude-sonnet-4-0',
+		'prompt_transform.inference.provider.Google.model': 'gemini-2.5-flash',
+		'prompt_transform.inference.provider.OpenRouter.model':
+			'mistralai/mixtral-8x7b',
+		// Empty strings for Custom provider - user must configure when switching to Custom
+		// baseUrl falls back to global setting in transformer.ts
+		'prompt_transform.inference.provider.Custom.model': '',
+		'prompt_transform.inference.provider.Custom.baseUrl': '',
+
+		'prompt_transform.systemPromptTemplate': '',
+		'prompt_transform.userPromptTemplate': '',
+
+		'find_replace.findText': '',
+		'find_replace.replaceText': '',
+		'find_replace.useRegex': false,
+	};
+}