diff --git a/tools/refactoring/error-as-todo/parse-args.ts b/tools/refactoring/error-as-todo/parse-args.ts
new file mode 100644
index 000000000..a8afba710
--- /dev/null
+++ b/tools/refactoring/error-as-todo/parse-args.ts
@@ -0,0 +1,42 @@
+import { Priority } from './types'
+
+export interface ParsedArgs {
+  dryRun: boolean
+  verbose: boolean
+  limit?: number
+  priority?: Priority
+  showHelp: boolean
+}
+
+function printHelp() {
+  console.log('Error-as-TODO Refactoring Runner\n')
+  console.log('Treats all errors as actionable TODO items!\n')
+  console.log('Usage: tsx error-as-todo-refactor.ts [options] [priority]\n')
+  console.log('Options:')
+  console.log('  -d, --dry-run      Preview without writing')
+  console.log('  -v, --verbose      Show detailed output')
+  console.log('  --limit=N          Process only N files')
+  console.log('  high|medium|low    Filter by priority')
+  console.log('  -h, --help         Show help\n')
+  console.log('Examples:')
+  console.log('  tsx error-as-todo-refactor.ts high --limit=5')
+  console.log('  tsx error-as-todo-refactor.ts --dry-run medium')
+}
+
+export function parseArgs(rawArgs: string[]): ParsedArgs {
+  const args = rawArgs.slice()
+  const showHelp = args.includes('--help') || args.includes('-h')
+
+  if (showHelp) {
+    printHelp()
+    return { dryRun: false, verbose: false, showHelp: true }
+  }
+
+  const dryRun = args.includes('--dry-run') || args.includes('-d')
+  const verbose = args.includes('--verbose') || args.includes('-v')
+  const limitArg = args.find(a => a.startsWith('--limit='))
+  const limit = limitArg ? parseInt(limitArg.split('=')[1], 10) : undefined
+  const priority = args.find(a => ['high', 'medium', 'low', 'all'].includes(a)) as Priority | undefined
+
+  return { dryRun, verbose, limit, priority, showHelp }
+}
diff --git a/tools/refactoring/error-as-todo/reporting.ts b/tools/refactoring/error-as-todo/reporting.ts
new file mode 100644
index 000000000..23374cfce
--- /dev/null
+++ b/tools/refactoring/error-as-todo/reporting.ts
@@ -0,0 +1,97 @@
+import * as fs from 'fs/promises'
+import * as path from 'path'
+import { RefactorSession, TodoItem } from './types'
+
+const PROGRESS_PATH = path.join(process.cwd(), 'docs/todo/LAMBDA_REFACTOR_PROGRESS.md')
+const TODO_MARKDOWN_PATH = path.join(process.cwd(), 'docs/todo/REFACTOR_TODOS.md')
+const TODO_JSON_PATH = path.join(process.cwd(), 'docs/todo/REFACTOR_TODOS.json')
+
+type TodoLogger = (todo: TodoItem) => void
+const sectionDivider = '\n## '
+
+export async function loadFilesFromReport(addTodo: TodoLogger): Promise<string[]> {
+  try {
+    const content = await fs.readFile(PROGRESS_PATH, 'utf-8')
+    const files: string[] = []
+    for (const line of content.split('\n')) {
+      if (line.includes('### Skipped')) break
+      const match = line.match(/- \[ \] `([^`]+)`/)
+      if (match) files.push(match[1])
+    }
+    return files
+  } catch (error) {
+    addTodo({
+      file: PROGRESS_PATH,
+      category: 'parse_error',
+      severity: 'high',
+      message: 'Could not load progress report - run refactor-to-lambda.ts first',
+      suggestion: 'npx tsx tools/refactoring/cli/refactor-to-lambda.ts'
+    })
+    return []
+  }
+}
+
+export function generateTodoReport(todos: TodoItem[]): string {
+  const byCategory = todos.reduce<Record<string, number>>((acc, todo) => ({ ...acc, [todo.category]: (acc[todo.category] || 0) + 1 }), {})
+  const bySeverity = todos.reduce<Record<string, number>>((acc, todo) => ({ ...acc, [todo.severity]: (acc[todo.severity] || 0) + 1 }), {})
+  const append = (line: string) => (report += line)
+  let report = '# Lambda Refactoring TODO List\n\n'
+  append(`**Generated:** ${new Date().toISOString()}\n\n`)
+  append('## Summary\n\n')
+  append(`**Philosophy:** Errors are good - they're our TODO list! 🎯\n\n`)
+  append(`- Total items: ${todos.length}\n- 🔴 High priority: ${bySeverity.high || 0}\n- 🟡 Medium priority: ${bySeverity.medium || 0}\n- 🟢 Low priority: ${bySeverity.low || 0}\n- 💡 Successes: ${bySeverity.info || 0}\n\n`)
+
+  append('## By Category\n\n')
+  for (const [category, count] of Object.entries(byCategory).sort((a, b) => b[1] - a[1])) {
+    const emoji = { parse_error: '🔧', type_error: '📘', import_error: '📦', test_failure: '🧪', lint_warning: '✨', manual_fix_needed: '👷', success: '✅' }[category] || '📋'
+    append(`- ${emoji} ${category.replace(/_/g, ' ')}: ${count}\n`)
+  }
+
+  for (const severity of ['high', 'medium', 'low', 'info'] as const) {
+    const items = todos.filter(t => t.severity === severity)
+    if (items.length === 0) continue
+    const emoji = { high: '🔴', medium: '🟡', low: '🟢', info: '💡' }[severity]
+    append(`${sectionDivider}${emoji} ${severity.toUpperCase()} Priority\n\n`)
+    const byFile = items.reduce<Record<string, TodoItem[]>>((acc, todo) => ({ ...acc, [todo.file]: [...(acc[todo.file] || []), todo] }), {})
+    for (const [file, todosForFile] of Object.entries(byFile)) {
+      append(`### \`${file}\`\n\n`)
+      todosForFile.forEach(todo => {
+        const categoryEmoji = { parse_error: '🔧', type_error: '📘', import_error: '📦', test_failure: '🧪', lint_warning: '✨', manual_fix_needed: '👷', success: '✅' }[todo.category] || '📋'
+        append(`- [ ] ${categoryEmoji} **${todo.category.replace(/_/g, ' ')}**: ${todo.message}\n`)
+        if (todo.location) append(`  - 📍 Location: \`${todo.location}\`\n`)
+        if (todo.suggestion) append(`  - 💡 Suggestion: ${todo.suggestion}\n`)
+        if (todo.relatedFiles && todo.relatedFiles.length > 0) append(`  - 📁 Related files: ${todo.relatedFiles.length} files created\n`)
+        append('\n')
+      })
+    }
+  }
+
+  append(`${sectionDivider}Quick Fixes\n\n`)
+  append(
+    `### For "this" references:\n\`\`\`typescript\nconst result = this.helperMethod()\n\nimport { helperMethod } from './helper-method'\nconst result = helperMethod()\n\`\`\`\n\n` +
+      '### For import cleanup:\n```bash\nnpm run lint:fix\n```\n\n' +
+      '### For type errors:\n```bash\nnpm run typecheck\n```\n\n'
+  )
+
+  append('## Next Steps\n\n')
+  append(`1. Address high-priority items first (${bySeverity.high || 0} items)\n2. Fix "this" references in extracted functions\n3. Run \`npm run lint:fix\` to clean up imports\n4. Run \`npm run typecheck\` to verify types\n5. Run \`npm run test:unit\` to verify functionality\n6. Commit working batches incrementally\n\n`)
+  append('## Remember\n\n**Errors are good!** They\'re not failures - they\'re a TODO list telling us exactly what needs attention. ✨\n')
+  return report
+}
+
+export function buildSession(filesProcessed: number, todos: TodoItem[]): RefactorSession {
+  return {
+    timestamp: new Date().toISOString(),
+    filesProcessed,
+    successCount: todos.filter(t => t.category === 'success').length,
+    todosGenerated: todos.filter(t => t.category !== 'success').length,
+    todos
+  }
+}
+
+export async function writeReports(session: RefactorSession, markdown: string): Promise<void> {
+  await fs.writeFile(TODO_MARKDOWN_PATH, markdown, 'utf-8')
+  await fs.writeFile(TODO_JSON_PATH, JSON.stringify(session, null, 2), 'utf-8')
+  console.log(`✅ TODO report saved: ${TODO_MARKDOWN_PATH}`)
+  console.log(`✅ JSON data saved: ${TODO_JSON_PATH}`)
+}
diff --git a/tools/refactoring/error-as-todo/runner.ts b/tools/refactoring/error-as-todo/runner.ts
new file mode 100644
index 000000000..9788f9c86
--- /dev/null
+++ b/tools/refactoring/error-as-todo/runner.ts
@@ -0,0 +1,126 @@
+import * as fs from 'fs/promises'
+import { MultiLanguageLambdaRefactor } from '../multi-lang-refactor'
+import { RunnerOptions, TodoItem } from './types'
+
+type TodoLogger = (todo: TodoItem) => void
+interface RunnerContext extends RunnerOptions { addTodo: TodoLogger }
+const createLogger = (verbose: boolean) => (message: string) => verbose && console.log(message)
+
+async function detectPostRefactorIssues(files: string[], addTodo: TodoLogger, logVerbose: (message: string) => void) {
+  logVerbose('  🔍 Checking for common issues...')
+  for (const file of files) {
+    if (!file.endsWith('.ts')) continue
+    try {
+      const content = await fs.readFile(file, 'utf-8')
+      const checks: Array<[boolean, TodoItem]> = [
+        [
+          content.includes('this.'),
+          {
+            file,
+            category: 'manual_fix_needed',
+            severity: 'high',
+            message: 'Contains "this" reference - needs manual conversion from class method to function',
+            location: file,
+            suggestion: 'Replace "this.methodName" with direct function calls or pass data as parameters'
+          }
+        ],
+        [
+          content.includes('import') && content.split('import').length > 10,
+          {
+            file,
+            category: 'import_error',
+            severity: 'low',
+            message: 'Many imports detected - may need optimization',
+            suggestion: 'Review imports and remove unused ones'
+          }
+        ],
+        [
+          content.split('\n').length > 100,
+          {
+            file,
+            category: 'manual_fix_needed',
+            severity: 'medium',
+            message: 'Extracted function is still large - may need further breakdown',
+            suggestion: 'Consider breaking into smaller functions'
+          }
+        ]
+      ]
+      checks.filter(([condition]) => condition).forEach(([, todo]) => addTodo(todo))
+    } catch (error) {
+      addTodo({
+        file,
+        category: 'parse_error',
+        severity: 'medium',
+        message: `Unexpected issue reading file: ${error instanceof Error ? error.message : String(error)}`,
+        suggestion: 'Verify generated file is accessible'
+      })
+    }
+  }
+}
+
+async function refactorWithTodoCapture(context: RunnerContext, addTodo: TodoLogger) {
+  const { files, dryRun, limit, verbose } = context
+  const logVerbose = createLogger(verbose)
+  const targetFiles = limit ? files.slice(0, limit) : files
+  const refactor = new MultiLanguageLambdaRefactor({ dryRun, verbose: false })
+  console.log('🎯 Error-as-TODO Refactoring Runner')
+  console.log('   Philosophy: Errors are good - they tell us what to fix!\n')
+  console.log(`   Mode: ${dryRun ? '🔍 DRY RUN' : '⚡ LIVE'}`)
+  console.log(`   Files: ${targetFiles.length}\n`)
+
+  for (let i = 0; i < targetFiles.length; i++) {
+    const file = targetFiles[i]
+    console.log(`\n[${i + 1}/${targetFiles.length}] 📝 ${file}`)
+    try {
+      try {
+        await fs.access(file)
+      } catch {
+        addTodo({ file, category: 'parse_error', severity: 'low', message: 'File not found - may have been moved or deleted', suggestion: 'Update progress report or verify file location' })
+        continue
+      }
+
+      const result = await refactor.refactorFile(file)
+      if (result.success) {
+        console.log('  ✅ Refactored successfully')
+        addTodo({ file, category: 'success', severity: 'info', message: `Successfully refactored into ${result.newFiles.length} files`, relatedFiles: result.newFiles })
+      } else if (result.errors.some(e => e.includes('skipping'))) {
+        console.log('  ⏭️  Skipped (not enough functions)')
+        addTodo({ file, category: 'manual_fix_needed', severity: 'low', message: 'File has < 3 functions - manual refactoring may not be needed', suggestion: 'Review file to see if refactoring would add value' })
+      } else {
+        console.log('  ⚠️  Encountered issues')
+        result.errors.forEach(error =>
+          addTodo({ file, category: 'parse_error', severity: 'medium', message: error, suggestion: 'May need manual intervention or tool improvement' })
+        )
+      }
+
+      if (result.success && !dryRun) await detectPostRefactorIssues(result.newFiles, addTodo, logVerbose)
+    } catch (error) {
+      console.log('  ❌ Error occurred')
+      addTodo({ file, category: 'parse_error', severity: 'high', message: `Unexpected error: ${error instanceof Error ? error.message : String(error)}`, suggestion: 'Report this error for tool improvement' })
+    }
+    await new Promise(resolve => setTimeout(resolve, 50))
+  }
+}
+
+export async function runRefactorSession(context: RunnerContext): Promise<TodoItem[]> {
+  const todos: TodoItem[] = []
+  const forwardTodo: TodoLogger = todo => {
+    todos.push(todo)
+    context.addTodo(todo)
+  }
+  await refactorWithTodoCapture({ ...context, addTodo: forwardTodo }, forwardTodo)
+
+  console.log('\n' + '='.repeat(60))
+  console.log('📊 SESSION SUMMARY')
+  console.log('='.repeat(60))
+  const filesProcessed = context.limit ? Math.min(context.limit, context.files.length) : context.files.length
+  const countBy = (predicate: (todo: TodoItem) => boolean) => todos.filter(predicate).length
+  console.log(`Files processed: ${filesProcessed}`)
+  console.log(`✅ Successes: ${countBy(t => t.category === 'success')}`)
+  console.log(`📋 TODOs generated: ${countBy(t => t.category !== 'success')}`)
+  console.log(`  🔴 High: ${countBy(t => t.severity === 'high')}`)
+  console.log(`  🟡 Medium: ${countBy(t => t.severity === 'medium')}`)
+  console.log(`  🟢 Low: ${countBy(t => t.severity === 'low')}`)
+  console.log('\n💡 Remember: Errors are good! They tell us exactly what to fix.')
+  return todos
+}
diff --git a/tools/refactoring/error-as-todo/types.ts b/tools/refactoring/error-as-todo/types.ts
new file mode 100644
index 000000000..ec12c1a52
--- /dev/null
+++ b/tools/refactoring/error-as-todo/types.ts
@@ -0,0 +1,37 @@
+export type TodoCategory =
+  | 'parse_error'
+  | 'type_error'
+  | 'import_error'
+  | 'test_failure'
+  | 'lint_warning'
+  | 'manual_fix_needed'
+  | 'success'
+
+export type TodoSeverity = 'high' | 'medium' | 'low' | 'info'
+
+export interface TodoItem {
+  file: string
+  category: TodoCategory
+  severity: TodoSeverity
+  message: string
+  location?: string
+  suggestion?: string
+  relatedFiles?: string[]
+}
+
+export interface RefactorSession {
+  timestamp: string
+  filesProcessed: number
+  successCount: number
+  todosGenerated: number
+  todos: TodoItem[]
+}
+
+export interface RunnerOptions {
+  files: string[]
+  dryRun: boolean
+  verbose: boolean
+  limit?: number
+}
+
+export type Priority = 'high' | 'medium' | 'low' | 'all'