Add error to LLM output

lib/index.ts

@@ -6,3 +6,4 @@ export * from './utils/llm/grok'
 export * from './utils/llm/structures/zod'
 export * from './utils/prompts'
 export * from './utils/strategies'
+export * from './utils/errors'

lib/types/types.ts

@@ -49,6 +49,7 @@ export type LlmProcessOutput = {
         model: string
     }
     response: Strategy[] | null
+    error?: string | null
 }
 
 export type ProcessAddressProps = {

lib/utils/errors.ts

@@ -0,0 +1,3 @@
+export function stringifyError(error: unknown): string {
+    return error instanceof Error ? error.message : JSON.stringify(error)
+}

lib/utils/llm/gemini.ts

@@ -1,5 +1,6 @@
 import { GoogleGenerativeAI, Schema, SchemaType } from '@google/generative-ai'
 import { LlmProcessOutput, LlmProcessProps, Strategy } from '../../types'
+import { stringifyError } from '../errors'
 
 export const GEMINI_MODELS = {
     // TODO: more pre-config models
@@ -57,6 +58,7 @@ const schema = {
 
 export async function callGemini(llmInput: LlmProcessProps): Promise<LlmProcessOutput> {
     let output = null
+    let error = null
     const model = llmInput.model || GEMINI_MODELS.gemini20flashExp
 
     try {
@@ -74,10 +76,12 @@ export async function callGemini(llmInput: LlmProcessProps): Promise<LlmProcessO
 
         try {
             output = JSON.parse(content || '[]') as Strategy[]
-        } catch (error) {
-            console.error('Invalid JSON in Gemini AI output: ', error)
+        } catch (err) {
+            error = stringifyError(err)
+            console.error(`Invalid JSON in Gemini AI output: ${error}`)
         }
-    } catch (error) {
+    } catch (err) {
+        error = stringifyError(err)
         console.error(`Error querying Gemini AI: ${error}`)
     }
 
@@ -86,6 +90,7 @@ export async function callGemini(llmInput: LlmProcessProps): Promise<LlmProcessO
             provider: 'Google',
             model
         },
-        response: output
+        response: output,
+        error
     }
 }

lib/utils/llm/grok.ts

@@ -2,6 +2,7 @@ import OpenAI from 'openai'
 import { zodResponseFormat } from 'openai/helpers/zod'
 import { LlmProcessOutput, LlmProcessProps, Strategy } from '../../types'
 import { StrategiesZodSchema } from './structures/zod'
+import { stringifyError } from '../errors'
 
 export const XAI_MODELS = {
     grok2latest: 'grok-2-latest'
@@ -14,6 +15,7 @@ const apiClient = new OpenAI({
 
 export async function callGrok(llmInput: LlmProcessProps): Promise<LlmProcessOutput> {
     let output = null
+    let error = null
     const model = llmInput.model || XAI_MODELS.grok2latest
 
     try {
@@ -36,10 +38,12 @@ export async function callGrok(llmInput: LlmProcessProps): Promise<LlmProcessOut
         try {
             const parsed = JSON.parse(outputContent) as { strategies: Strategy[] }
             output = parsed.strategies || []
-        } catch (error) {
-            console.error('Invalid JSON in Grok output: ', error)
+        } catch (err) {
+            error = stringifyError(err)
+            console.error(`Invalid JSON in Grok output: ${error}`)
         }
-    } catch (error) {
+    } catch (err) {
+        error = stringifyError(err)
         console.error(`Error querying Grok: ${error}`)
     }
 
@@ -48,6 +52,7 @@ export async function callGrok(llmInput: LlmProcessProps): Promise<LlmProcessOut
             provider: 'xAI',
             model
         },
-        response: output
+        response: output,
+        error
     }
 }