fix(amazonq): add error message for README update too large (aws#6347)

## Problem
If a request to update a README results in an updated README that
exceeds the size limit, a generic "I'm sorry, I ran into an issue
updating your README" error is displayed.

## Solution
Display a more specific error message when an updated README Exceeds the
size limit

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).
- License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: avi-alpert

packages/amazonq/.changes/next-release/Feature-8a43c3c3-9ecb-44b6-bb0c-34d2065aee26.json

@@ -0,0 +1,4 @@
+{
+	"type": "Feature",
+	"description": "feat(amazonq): Add error message for updated README too large"
+}

packages/core/package.nls.json

@@ -379,6 +379,7 @@
     "AWS.amazonq.doc.error.noFolderSelected": "It looks like you didn't choose a folder. Choose a folder to continue.",
     "AWS.amazonq.doc.error.contentLengthError": "Your workspace is too large for me to review. Your workspace must be within the quota, even if you choose a smaller folder. For more information on quotas, see the <a href=\"https://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/doc-generation.html#quotas\" target=\"_blank\">Amazon Q Developer documentation.</a>",
     "AWS.amazonq.doc.error.readmeTooLarge": "The README in your folder is too large for me to review. Try reducing the size of your README, or choose a folder with a smaller README. For more information on quotas, see the <a href=\"https://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/doc-generation.html#quotas\" target=\"_blank\">Amazon Q Developer documentation.</a>",
+    "AWS.amazonq.doc.error.readmeUpdateTooLarge": "The updated README is too large. Try reducing the size of your README, or asking for a smaller update. For more information on quotas, see the <a href=\"https://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/doc-generation.html#quotas\" target=\"_blank\">Amazon Q Developer documentation.</a>",
     "AWS.amazonq.doc.error.workspaceEmpty": "The folder you chose did not contain any source files in a supported language. Choose another folder and try again. For more information on supported languages, see the <a href=\"https://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/doc-generation.html\" target=\"_blank\">Amazon Q Developer documentation.</a>",
     "AWS.amazonq.doc.error.promptTooVague": "I need more information to make changes to your README. Try providing some of the following details:\n- Which sections you want to modify\n- The content you want to add or remove\n- Specific issues that need correcting\n\nFor more information on prompt best practices, see the <a href=\"https://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/doc-generation.html\" target=\"_blank\">Amazon Q Developer documentation.</a>",
     "AWS.amazonq.doc.error.promptUnrelated": "These changes don't seem related to documentation. Try describing your changes again, using the following best practices:\n- Changes should relate to how project functionality is reflected in the README\n- Content you refer to should be available in your codebase\n\n For more information on prompt best practices, see the <a href=\"https://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/doc-generation.html\" target=\"_blank\">Amazon Q Developer documentation.</a>",

packages/core/src/amazonqDoc/errors.ts

@@ -20,6 +20,14 @@ export class ReadmeTooLargeError extends ToolkitError {
     }
 }
 
+export class ReadmeUpdateTooLargeError extends ToolkitError {
+    constructor() {
+        super(i18n('AWS.amazonq.doc.error.readmeUpdateTooLarge'), {
+            code: ReadmeUpdateTooLargeError.name,
+        })
+    }
+}
+
 export class WorkspaceEmptyError extends ToolkitError {
     constructor() {
         super(i18n('AWS.amazonq.doc.error.workspaceEmpty'), {

packages/core/src/amazonqDoc/session/sessionState.ts

@@ -45,6 +45,7 @@ import {
     PromptTooVagueError,
     PromptUnrelatedError,
     ReadmeTooLargeError,
+    ReadmeUpdateTooLargeError,
     WorkspaceEmptyError,
 } from '../errors'
 import { DocMessenger } from '../messenger'
@@ -149,6 +150,9 @@ abstract class CodeGenBase {
                         case codegenResult.codeGenerationStatusDetail?.includes('README_TOO_LARGE'): {
                             throw new ReadmeTooLargeError()
                         }
+                        case codegenResult.codeGenerationStatusDetail?.includes('README_UPDATE_TOO_LARGE'): {
+                            throw new ReadmeUpdateTooLargeError()
+                        }
                         case codegenResult.codeGenerationStatusDetail?.includes('WORKSPACE_TOO_LARGE'): {
                             throw new ContentLengthError()
                         }