fix: clear history for inputTooLong errors (#1268)

Author: tsmithsz

server/aws-lsp-codewhisperer/src/language-server/agenticChat/agenticChatController.test.ts

@@ -1081,7 +1081,7 @@ describe('AgenticChatController', () => {
             const typedChatResult = chatResult as ResponseError<ChatResult>
             assert.strictEqual(
                 typedChatResult.data?.body,
-                'Too much context loaded. Please start a new conversation or ask about specific files.'
+                'Too much context loaded. I have cleared the conversation history. Please retry your request with smaller input.'
             )
         })
 

server/aws-lsp-codewhisperer/src/language-server/agenticChat/agenticChatController.ts

@@ -1591,6 +1591,10 @@ export class AgenticChatController implements ChatHandlers {
 
         if (customerFacingErrorCodes.includes(err.code)) {
             this.#features.logging.error(`${loggingUtils.formatErr(err)}`)
+            if (err.code === 'InputTooLong') {
+                // Clear the chat history in the database for this tab
+                this.#chatHistoryDb.clearTab(tabId)
+            }
             return new ResponseError<ChatResult>(LSPErrorCodes.RequestFailed, err.message, {
                 type: 'answer',
                 body: err.message,

server/aws-lsp-codewhisperer/src/language-server/chat/chatSessionService.ts

@@ -143,7 +143,7 @@ export class ChatSessionService {
                         requestId = e.$metadata?.requestId
                     }
                     throw new AgenticChatError(
-                        'Too much context loaded. Please start a new conversation or ask about specific files.',
+                        'Too much context loaded. I have cleared the conversation history. Please retry your request with smaller input.',
                         'InputTooLong',
                         e instanceof Error ? e : undefined,
                         requestId