feat: comprehensive import progress tracking for all 7 formats

Add real-time progress reporting throughout the entire import pipeline with a standardized API that works across all supported formats. Workshop Team Feature Request: - Eliminates "0% complete" hangs during AI extraction - Shows continuous progress with entities/sec, throughput, ETA - Reports contextual messages ("Processing page 5 of 23") - Standardized progress API for CSV, PDF, Excel, JSON, Markdown, YAML, DOCX Core Changes: - Add FormatHandlerProgressHooks interface for extensible progress - Wire up all 3 binary format handlers (CSV, PDF, Excel) with 7+ progress points - Wire up all 4 text format importers (JSON, Markdown, YAML, DOCX) - Add ImportProgress interface with stage, message, counts, throughput, ETA - ImportCoordinator normalizes all format progress to standard interface CLI Improvements: - Import command now uses brain.import() directly with full progress - Add --include-vfs flag to find command (v4.4.0 compatibility) - Add --confidence and --weight options to add command Documentation: - docs/guides/standard-import-progress.md - Universal API guide - docs/guides/import-progress-implementation.md - Developer guide - docs/guides/import-progress-examples.md - Practical examples - JSDoc on brain.import() with universal handler examples Result: ONE progress handler works for ALL 7 formats with zero format-specific code! 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
2025-10-24 14:45:46 -07:00 · 2025-10-24 14:45:46 -07:00 · d5576ffb56
commit d5576ffb56
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--- a/docs/DEVELOPER_LEARNING_PATH.md
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--- a/docs/guides/import-progress-examples.md
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 # Import Progress - Usage Examples
 **How to Use Progress Tracking in Your Applications**
 Brainy v4.5.0+ provides real-time progress tracking for **all 7 supported file formats** (CSV, PDF, Excel, JSON, Markdown, YAML, DOCX).
 > **⚠️ KEY FEATURE:** The progress API is **100% standardized**. Write your progress handler ONCE and it works for ALL formats with zero format-specific code! See [Standard Import Progress API](./standard-import-progress.md) for the complete interface documentation.
 ---
 ## 🚀 Quick Start
 ### Basic Progress Tracking
 ```typescript
 import { Brainy } from '@soulcraft/brainy'
 import * as fs from 'fs'
 const brain = await Brainy.create()
 // Import with progress tracking
 const result = await brain.import(fs.readFileSync('large-file.xlsx'), {
  onProgress: (progress) => {
    console.log(`Progress: ${progress.stage}`)
    console.log(`  Message: ${progress.message}`)
    console.log(`  Entities: ${progress.entities || 0}`)
    console.log(`  Relationships: ${progress.relationships || 0}`)
  }
 })
 console.log(`Import complete: ${result.entities.length} entities created`)
 ```
 **Expected Output:**
 ```
 Progress: detecting
  Message: Detecting format...
  Entities: 0
  Relationships: 0
 Progress: extracting
  Message: Loading Excel workbook...
  Entities: 0
  Relationships: 0
 Progress: extracting
  Message: Reading sheet: Sales (1/3)
  Entities: 0
  Relationships: 0
 Progress: extracting
  Message: Parsing Excel (33%)
  Entities: 0
  Relationships: 0
 Progress: extracting
  Message: Reading sheet: Products (2/3)
  Entities: 0
  Relationships: 0
 ... (more progress updates)
 Progress: complete
  Message: Import complete
  Entities: 1523
  Relationships: 892
 Import complete: 1523 entities created
 ```
 ---
 ## 🎯 Universal Progress Handler (Works for ALL Formats)
 The examples below show format-specific messages, but **you don't need format-specific code**! The `ImportProgress` interface is the same for all formats:
 ```typescript
 // ONE HANDLER FOR ALL FORMATS!
 function universalProgressHandler(progress) {
  console.log(`[${progress.stage}] ${progress.message}`)
  if (progress.processed && progress.total) {
    console.log(`  Progress: ${progress.processed}/${progress.total}`)
  }
  if (progress.entities || progress.relationships) {
    console.log(`  Extracted: ${progress.entities || 0} entities, ${progress.relationships || 0} relationships`)
  }
  if (progress.throughput && progress.eta) {
    console.log(`  Rate: ${progress.throughput.toFixed(1)}/sec, ETA: ${Math.round(progress.eta/1000)}s`)
  }
 }
 // Use it for ANY format!
 await brain.import(csvBuffer, { onProgress: universalProgressHandler })
 await brain.import(pdfBuffer, { onProgress: universalProgressHandler })
 await brain.import(excelBuffer, { onProgress: universalProgressHandler })
 await brain.import(jsonBuffer, { onProgress: universalProgressHandler })
 await brain.import(markdownString, { onProgress: universalProgressHandler })
 await brain.import(yamlBuffer, { onProgress: universalProgressHandler })
 await brain.import(docxBuffer, { onProgress: universalProgressHandler })
 ```
 ---
 ## 📊 What Different Formats Look Like (Same Handler!)
 The examples below show **what messages look like** for different formats using the **same universal handler** above.
 ### CSV Import (Row-by-Row Progress)
 ```typescript
 await brain.import(csvBuffer, {
  format: 'csv',
  onProgress: (progress) => {
    if (progress.stage === 'extracting') {
      // CSV reports: "Parsing CSV (45%)", "Extracted 1000 rows", etc.
      console.log(progress.message)
    }
  }
 })
 ```
 **CSV Progress Messages:**
 - ✅ "Detecting CSV encoding and delimiter..."
 - ✅ "Parsing CSV rows (delimiter: ",")"
 - ✅ "Parsed 75%"  (via bytes processed)
 - ✅ "Extracted 1000 rows"
 - ✅ "Converting types: 5000/10000 rows..."
 - ✅ "CSV processing complete: 10000 rows"
 ---
 ### PDF Import (Page-by-Page Progress)
 ```typescript
 await brain.import(pdfBuffer, {
  format: 'pdf',
  onProgress: (progress) => {
    // PDF reports exact page numbers
    console.log(progress.message)
    // Example: "Processing page 5 of 23"
  }
 })
 ```
 **PDF Progress Messages:**
 - ✅ "Loading PDF document..."
 - ✅ "Processing 23 pages..."
 - ✅ "Processing page 5 of 23"
 - ✅ "Parsed 22%" (via bytes processed)
 - ✅ "Extracted 156 items from PDF"
 - ✅ "PDF complete: 23 pages, 156 items extracted"
 ---
 ### Excel Import (Sheet-by-Sheet Progress)
 ```typescript
 await brain.import(excelBuffer, {
  format: 'excel',
  onProgress: (progress) => {
    // Excel reports sheet names
    console.log(progress.message)
    // Example: "Reading sheet: Q2 Sales (2/5)"
  }
 })
 ```
 **Excel Progress Messages:**
 - ✅ "Loading Excel workbook..."
 - ✅ "Processing 3 sheets..."
 - ✅ "Reading sheet: Sales (1/3)"
 - ✅ "Parsing Excel (33%)" (via bytes processed)
 - ✅ "Extracted 5234 rows from Excel"
 - ✅ "Excel complete: 3 sheets, 5234 rows"
 ---
 ### JSON Import (Node Traversal)
 ```typescript
 await brain.import(jsonBuffer, {
  format: 'json',
  onProgress: (progress) => {
    // JSON reports every 10 nodes
    console.log(`Processed ${progress.processed} nodes, found ${progress.entities} entities`)
  }
 })
 ```
 ---
 ### Markdown Import (Section-by-Section)
 ```typescript
 await brain.import(markdownString, {
  format: 'markdown',
  onProgress: (progress) => {
    console.log(`Section ${progress.processed}/${progress.total}`)
  }
 })
 ```
 ---
 ## 🎯 Building Progress UI Components
 ### React Progress Bar
 ```typescript
 function ImportProgress({ file }: { file: File }) {
  const [progress, setProgress] = useState({
    stage: 'idle',
    message: '',
    percent: 0,
    entities: 0,
    relationships: 0
  })
  const handleImport = async () => {
    const buffer = await file.arrayBuffer()
    await brain.import(Buffer.from(buffer), {
      onProgress: (p) => {
        setProgress({
          stage: p.stage,
          message: p.message,
          // Estimate percentage from stage
          percent: {
            detecting: 10,
            extracting: 50,
            'storing-vfs': 80,
            'storing-graph': 90,
            complete: 100
          }[p.stage] || 0,
          entities: p.entities || 0,
          relationships: p.relationships || 0
        })
      }
    })
  }
  return (
    <div>
      <ProgressBar value={progress.percent} />
      <p>{progress.message}</p>
      <p>Entities: {progress.entities} | Relationships: {progress.relationships}</p>
    </div>
  )
 }
 ```
 ---
 ### CLI Progress Spinner
 ```typescript
 import ora from 'ora'
 const spinner = ora('Starting import...').start()
 await brain.import(buffer, {
  onProgress: (progress) => {
    spinner.text = progress.message
    if (progress.stage === 'complete') {
      spinner.succeed(`Import complete: ${progress.entities} entities`)
    }
  }
 })
 ```
 **CLI Output:**
 ```
 ⠋ Detecting format...
 ⠙ Loading Excel workbook...
 ⠹ Reading sheet: Sales (1/3)
 ⠸ Parsing Excel (33%)
 ⠼ Reading sheet: Products (2/3)
 ...
 ✔ Import complete: 1523 entities
 ```
 ---
 ### Progress Dashboard with ETA
 ```typescript
 let startTime = Date.now()
 let lastUpdate = startTime
 await brain.import(buffer, {
  onProgress: (progress) => {
    const elapsed = Date.now() - startTime
    const rate = progress.entities / (elapsed / 1000)  // entities/sec
    console.clear()
    console.log('Import Progress Dashboard')
    console.log('========================')
    console.log(`Stage: ${progress.stage}`)
    console.log(`Status: ${progress.message}`)
    console.log(`Entities: ${progress.entities}`)
    console.log(`Relationships: ${progress.relationships}`)
    console.log(`Rate: ${rate.toFixed(1)} entities/sec`)
    console.log(`Elapsed: ${(elapsed / 1000).toFixed(1)}s`)
  }
 })
 ```
 ---
 ## 🔧 Advanced: Format-Specific Optimization
 ### Detecting Format to Show Appropriate Progress
 ```typescript
 const formatMessages = {
  csv: (p) => `CSV: ${p.message}`,
  pdf: (p) => `PDF: ${p.message}`,
  excel: (p) => `Excel: ${p.message}`,
  json: (p) => `JSON: ${p.processed} nodes, ${p.entities} entities`,
  markdown: (p) => `Markdown: Section ${p.processed}/${p.total}`,
  yaml: (p) => `YAML: ${p.processed} nodes`,
  docx: (p) => `DOCX: ${p.processed} paragraphs`
 }
 await brain.import(buffer, {
  onProgress: (progress) => {
    // Format is available in progress.stage metadata
    const message = formatMessages[detectedFormat]?.(progress) || progress.message
    console.log(message)
  }
 })
 ```
 ---
 ## ⚡ Performance Tips
 ### Throttle UI Updates
 ```typescript
 let lastUIUpdate = 0
 const THROTTLE_MS = 100  // Update UI max once per 100ms
 await brain.import(buffer, {
  onProgress: (progress) => {
    const now = Date.now()
    if (now - lastUIUpdate < THROTTLE_MS && progress.stage !== 'complete') {
      return  // Skip this update
    }
    lastUIUpdate = now
    updateUI(progress)  // Only update every 100ms
  }
 })
 ```
 **Note:** Brainy already throttles progress callbacks internally, but additional UI throttling can help with heavy rendering.
 ---
 ## 📝 Summary
 ✅ **All 7 formats** have consistent progress reporting
 ✅ **Real-time updates** during long imports (no more "0%" hangs)
 ✅ **Contextual messages** show exactly what's happening
 ✅ **Build reliable tools** with standardized progress callbacks
 ✅ **Workshop team problem SOLVED** - users see progress throughout import
 **Files Modified:**
 - 3 handlers: `csvHandler.ts`, `pdfHandler.ts`, `excelHandler.ts`
 - 7 importers: `SmartCSVImporter.ts`, `SmartPDFImporter.ts`, `SmartExcelImporter.ts`, `SmartJSONImporter.ts`, `SmartMarkdownImporter.ts`, `SmartYAMLImporter.ts`, `SmartDOCXImporter.ts`
 **Result:** Comprehensive, consistent progress tracking across ALL import formats!
--- a/docs/guides/import-progress-implementation.md
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@ -0,0 +1,734 @@
 # Import Progress Implementation Guide
 **For Developers: How to Add Progress Tracking to ANY File Handler**
 > This guide shows the **standard pattern** for implementing rich progress tracking in Brainy import handlers. Follow this template for **all 7 supported formats** (CSV, PDF, Excel, JSON, Markdown, YAML, DOCX) or any future file format.
 ---
 ## 📊 Supported Formats & Consistent Progress Reporting
 > **⚠️ IMPORTANT FOR DEVELOPERS:** The public API (`ImportProgress`) is 100% standardized across all formats. You can build ONE progress handler that works for CSV, PDF, Excel, JSON, Markdown, YAML, and DOCX with **zero format-specific code**. See [Standard Import Progress API](./standard-import-progress.md) for details.
 **ALL 7 formats now have consistent, standardized progress reporting** for building reliable import tools:
 | Format | Category | Progress Points | File Location | Status |
 |--------|----------|-----------------|---------------|--------|
 | **CSV** | Tabular | Parsing → Row extraction → Type conversion → Complete | `handlers/csvHandler.ts` + `SmartCSVImporter.ts` | ✅ Complete |
 | **PDF** | Document | Loading → Page-by-page → Item extraction → Complete | `handlers/pdfHandler.ts` + `SmartPDFImporter.ts` | ✅ Complete |
 | **Excel** | Tabular | Loading → Sheet-by-sheet → Row extraction → Type conversion → Complete | `handlers/excelHandler.ts` + `SmartExcelImporter.ts` | ✅ Complete |
 | **JSON** | Structured | Parsing → Node traversal (every 10 nodes) → Complete | `SmartJSONImporter.ts` | ✅ Complete |
 | **Markdown** | Document | Parsing → Section-by-section → Complete | `SmartMarkdownImporter.ts` | ✅ Complete |
 | **YAML** | Structured | Parsing → Node traversal (every 10 nodes) → Complete | `SmartYAMLImporter.ts` | ✅ Complete |
 | **DOCX** | Document | Parsing → Paragraph-by-paragraph (every 10) → Complete | `SmartDOCXImporter.ts` | ✅ Complete |
 ### The Standard Public API
 **Developers calling `brain.import()` see ONE standardized interface** regardless of format:
 ```typescript
 // THE PUBLIC API - Same for ALL 7 formats!
 brain.import(buffer, {
  onProgress: (progress: ImportProgress) => {
    // These fields work for CSV, PDF, Excel, JSON, Markdown, YAML, DOCX
    progress.stage          // 'detecting' | 'extracting' | 'storing-vfs' | 'storing-graph' | 'complete'
    progress.message        // Human-readable status (varies by format, always readable)
    progress.processed      // Items processed (optional)
    progress.total          // Total items (optional)
    progress.entities       // Entities extracted (optional)
    progress.relationships  // Relationships inferred (optional)
    progress.throughput     // Items/sec (optional, during extraction)
    progress.eta            // Time remaining in ms (optional)
  }
 })
 ```
 **Internal Implementation** (for developers adding new format handlers):
 The table below shows how formats implement progress *internally*. Normal developers don't need to know this - they just use the standard `ImportProgress` interface above!
 ```typescript
 // Internal: Binary formats use handler hooks (you added these!)
 interface FormatHandlerProgressHooks {
  onBytesProcessed?: (bytes: number) => void
  onCurrentItem?: (message: string) => void
  onDataExtracted?: (count: number, total?: number) => void
 }
 // Internal: Text formats use importer callbacks
 interface ImporterProgressCallback {
  onProgress?: (stats: { processed, total, entities, relationships }) => void
 }
 // Both are converted to ImportProgress by ImportCoordinator!
 ```
 ### Developer Benefits
 ✅ **Consistent API** - Same pattern across all 7 formats
 ✅ **Throttled Updates** - Progress reported every 10-1000 items (no spam)
 ✅ **Contextual Messages** - "Processing page 5 of 23", "Reading sheet: Sales (2/5)"
 ✅ **Real-time Estimates** - Users see progress during long imports
 ✅ **Build Monitoring Tools** - Reliable progress data for UIs, dashboards, CLI tools
 ---
 ## 🎯 Overview
 As of v4.5.0, Brainy supports comprehensive, multi-dimensional progress tracking for imports:
 - **Bytes processed** (always available, most deterministic)
 - **Entities extracted** (AI extraction phase)
 - **Stage-specific metrics** (parsing: MB/s, extraction: entities/s)
 - **Time estimates** (remaining time, total time)
 - **Context information** ("Processing page 5 of 23")
 All handlers follow a simple, consistent pattern using **progress hooks**.
 ---
 ## 📋 The Progress Hooks Pattern
 ### 1. Progress Hooks Interface
 ```typescript
 export interface FormatHandlerProgressHooks {
  /**
   * Report bytes processed
   * Call this as you read/parse the file
   */
  onBytesProcessed?: (bytes: number) => void
  /**
   * Set current processing context
   * Examples: "Processing page 5", "Reading sheet: Q2 Sales"
   */
  onCurrentItem?: (item: string) => void
  /**
   * Report structured data extraction progress
   * Examples: "Extracted 100 rows", "Parsed 50 paragraphs"
   */
  onDataExtracted?: (count: number, total?: number) => void
 }
 ```
 ### 2. Handler Options (Automatic)
 Progress hooks are automatically passed to your handler via `FormatHandlerOptions`:
 ```typescript
 export interface FormatHandlerOptions {
  // ... existing options ...
  /**
   * Progress hooks (v4.5.0)
   * Handlers call these to report progress during processing
   */
  progressHooks?: FormatHandlerProgressHooks
  /**
   * Total file size in bytes (v4.5.0)
   * Used for progress percentage calculation
   */
  totalBytes?: number
 }
 ```
 **You don't need to modify FormatHandlerOptions** - it's already done!
 ### 3. Standard Implementation Pattern
 Every handler follows these 5 steps:
 ```typescript
 async process(data: Buffer | string, options: FormatHandlerOptions): Promise<ProcessedData> {
  const progressHooks = options.progressHooks  // Step 1: Get hooks
  // Step 2: Report initial progress
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem('Starting import...')
  }
  // Step 3: Report bytes as you process
  const buffer = Buffer.isBuffer(data) ? data : Buffer.from(data)
  if (progressHooks?.onBytesProcessed) {
    progressHooks.onBytesProcessed(0)  // Start
  }
  // ... do parsing ...
  if (progressHooks?.onBytesProcessed) {
    progressHooks.onBytesProcessed(buffer.length)  // Complete
  }
  // Step 4: Report data extraction
  if (progressHooks?.onDataExtracted) {
    progressHooks.onDataExtracted(data.length, data.length)
  }
  // Step 5: Report completion
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem(`Complete: ${data.length} items processed`)
  }
  return { format, data, metadata }
 }
 ```
 ---
 ## 📚 Complete Example: CSV Handler
 Here's the **ACTUAL implementation** from CSV handler showing all the key progress points:
 ```typescript
 async process(data: Buffer | string, options: FormatHandlerOptions): Promise<ProcessedData> {
  const startTime = Date.now()
  const progressHooks = options.progressHooks  // ✅ Step 1
  // Convert to buffer if string
  const buffer = Buffer.isBuffer(data) ? data : Buffer.from(data, 'utf-8')
  const totalBytes = buffer.length
  // ✅ Step 2: Report start
  if (progressHooks?.onBytesProcessed) {
    progressHooks.onBytesProcessed(0)
  }
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem('Detecting CSV encoding and delimiter...')
  }
  // Detect encoding
  const detectedEncoding = options.encoding || this.detectEncodingSafe(buffer)
  const text = buffer.toString(detectedEncoding as BufferEncoding)
  // Detect delimiter
  const delimiter = options.csvDelimiter || this.detectDelimiter(text)
  // ✅ Progress update: Parsing phase
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem(`Parsing CSV rows (delimiter: "${delimiter}")...`)
  }
  // Parse CSV
  const records = parse(text, { /* options */ })
  // ✅ Step 3: Report bytes processed (entire file parsed)
  if (progressHooks?.onBytesProcessed) {
    progressHooks.onBytesProcessed(totalBytes)
  }
  const data = Array.isArray(records) ? records : [records]
  // ✅ Step 4: Report data extraction
  if (progressHooks?.onDataExtracted) {
    progressHooks.onDataExtracted(data.length, data.length)
  }
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem(`Extracted ${data.length} rows, inferring types...`)
  }
  // Type inference and conversion
  const fields = data.length > 0 ? Object.keys(data[0]) : []
  const types = this.inferFieldTypes(data)
  const convertedData = data.map((row, index) => {
    const converted = this.convertRow(row, types)
    // ✅ Progress update every 1000 rows (avoid spam)
    if (progressHooks?.onCurrentItem && index > 0 && index % 1000 === 0) {
      progressHooks.onCurrentItem(`Converting types: ${index}/${data.length} rows...`)
    }
    return converted
  })
  // ✅ Step 5: Report completion
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem(`CSV processing complete: ${convertedData.length} rows`)
  }
  return {
    format: this.format,
    data: convertedData,
    metadata: { /* ... */ }
  }
 }
 ```
 ### Key Progress Points in CSV Handler
 | Progress Point | Hook Used | Message Example |
 |----------------|-----------|-----------------|
 | **Start** | `onCurrentItem` | "Detecting CSV encoding and delimiter..." |
 | **Start bytes** | `onBytesProcessed(0)` | 0 bytes |
 | **Parsing** | `onCurrentItem` | "Parsing CSV rows (delimiter: \",\")..." |
 | **Bytes complete** | `onBytesProcessed(totalBytes)` | All bytes read |
 | **Data extracted** | `onDataExtracted(count, total)` | Number of rows extracted |
 | **Type conversion** | `onCurrentItem` (every 1000 rows) | "Converting types: 5000/10000 rows..." |
 | **Complete** | `onCurrentItem` | "CSV processing complete: 10000 rows" |
 ---
 ## 📖 Implementation Guide by File Type
 ### Supported Formats
 Brainy supports **7 file formats** with full progress tracking:
 **Binary Formats** (use handlers):
 1. **CSV** - Row-by-row parsing with type inference
 2. **PDF** - Page-by-page extraction with table detection
 3. **Excel** - Sheet-by-sheet processing with formula evaluation
 **Text/Structured Formats** (parse inline):
 4. **JSON** - Recursive traversal of nested structures
 5. **Markdown** - Section-by-section with heading extraction
 6. **YAML** - Hierarchical traversal with relationship inference
 7. **DOCX** - Paragraph-by-paragraph with structure analysis
 ---
 ### PDF Handler (Multi-Page)
 ```typescript
 async process(data: Buffer, options: FormatHandlerOptions): Promise<ProcessedData> {
  const progressHooks = options.progressHooks
  const totalBytes = data.length
  // Report start
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem('Loading PDF document...')
  }
  const pdfDoc = await loadPDF(data)
  const totalPages = pdfDoc.numPages
  const extractedData: any[] = []
  let bytesProcessed = 0
  for (let pageNum = 1; pageNum <= totalPages; pageNum++) {
    // ✅ Report current page
    if (progressHooks?.onCurrentItem) {
      progressHooks.onCurrentItem(`Processing page ${pageNum} of ${totalPages}`)
    }
    const page = await pdfDoc.getPage(pageNum)
    const text = await page.getTextContent()
    extractedData.push(this.processPageText(text))
    // ✅ Estimate bytes processed (pages are sequential)
    bytesProcessed = Math.floor((pageNum / totalPages) * totalBytes)
    if (progressHooks?.onBytesProcessed) {
      progressHooks.onBytesProcessed(bytesProcessed)
    }
    // ✅ Report extraction progress
    if (progressHooks?.onDataExtracted) {
      progressHooks.onDataExtracted(pageNum, totalPages)
    }
  }
  // Final progress
  if (progressHooks?.onBytesProcessed) {
    progressHooks.onBytesProcessed(totalBytes)
  }
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem(`PDF complete: ${totalPages} pages processed`)
  }
  return { format: 'pdf', data: extractedData, metadata: { /* ... */ } }
 }
 ```
 ### Excel Handler (Multi-Sheet)
 ```typescript
 async process(data: Buffer, options: FormatHandlerOptions): Promise<ProcessedData> {
  const progressHooks = options.progressHooks
  const totalBytes = data.length
  // Load workbook
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem('Loading Excel workbook...')
  }
  const workbook = XLSX.read(data)
  const sheetNames = options.excelSheets === 'all'
    ? workbook.SheetNames
    : (options.excelSheets || [workbook.SheetNames[0]])
  const allData: any[] = []
  let bytesProcessed = 0
  for (let i = 0; i < sheetNames.length; i++) {
    const sheetName = sheetNames[i]
    // ✅ Report current sheet
    if (progressHooks?.onCurrentItem) {
      progressHooks.onCurrentItem(`Reading sheet: ${sheetName} (${i + 1}/${sheetNames.length})`)
    }
    const sheet = workbook.Sheets[sheetName]
    const sheetData = XLSX.utils.sheet_to_json(sheet)
    allData.push(...sheetData)
    // ✅ Estimate bytes processed (sheets processed sequentially)
    bytesProcessed = Math.floor(((i + 1) / sheetNames.length) * totalBytes)
    if (progressHooks?.onBytesProcessed) {
      progressHooks.onBytesProcessed(bytesProcessed)
    }
    // ✅ Report data extraction
    if (progressHooks?.onDataExtracted) {
      progressHooks.onDataExtracted(allData.length, undefined) // Total unknown until done
    }
  }
  // Final progress
  if (progressHooks?.onBytesProcessed) {
    progressHooks.onBytesProcessed(totalBytes)
  }
  if (progressHooks?.onCurrentItem) {
    progressHooks.onCurrentItem(`Excel complete: ${sheetNames.length} sheets, ${allData.length} rows`)
  }
  return { format: 'xlsx', data: allData, metadata: { /* ... */ } }
 }
 ```
 ### JSON Importer (Recursive Traversal)
 ```typescript
 async extract(data: any, options: SmartJSONOptions = {}): Promise<SmartJSONResult> {
  // ✅ Report parsing start
  options.onProgress?.({ processed: 0, entities: 0, relationships: 0 })
  // Parse JSON if string
  let jsonData = typeof data === 'string' ? JSON.parse(data) : data
  // ✅ Report parsing complete
  options.onProgress?.({ processed: 0, entities: 0, relationships: 0 })
  // Traverse and extract (reports progress every 10 nodes)
  const entities: ExtractedJSONEntity[] = []
  const relationships: ExtractedJSONRelationship[] = []
  let nodesProcessed = 0
  await this.traverseJSON(
    jsonData,
    entities,
    relationships,
    () => {
      nodesProcessed++
      if (nodesProcessed % 10 === 0) {
        options.onProgress?.({
          processed: nodesProcessed,
          entities: entities.length,
          relationships: relationships.length
        })
      }
    }
  )
  // ✅ Report completion
  options.onProgress?.({
    processed: nodesProcessed,
    entities: entities.length,
    relationships: relationships.length
  })
  return { nodesProcessed, entitiesExtracted: entities.length, ... }
 }
 ```
 ### Markdown Importer (Section-Based)
 ```typescript
 async extract(markdown: string, options: SmartMarkdownOptions = {}): Promise<SmartMarkdownResult> {
  // ✅ Report parsing start
  options.onProgress?.({ processed: 0, total: 0, entities: 0, relationships: 0 })
  // Parse markdown into sections
  const parsedSections = this.parseMarkdown(markdown, options)
  // ✅ Report parsing complete
  options.onProgress?.({ processed: 0, total: parsedSections.length, entities: 0, relationships: 0 })
  // Process each section (reports progress after each section)
  const sections: MarkdownSection[] = []
  for (let i = 0; i < parsedSections.length; i++) {
    const section = await this.processSection(parsedSections[i], options)
    sections.push(section)
    options.onProgress?.({
      processed: i + 1,
      total: parsedSections.length,
      entities: sections.reduce((sum, s) => sum + s.entities.length, 0),
      relationships: sections.reduce((sum, s) => sum + s.relationships.length, 0)
    })
  }
  // ✅ Report completion
  options.onProgress?.({
    processed: sections.length,
    total: sections.length,
    entities: sections.reduce((sum, s) => sum + s.entities.length, 0),
    relationships: sections.reduce((sum, s) => sum + s.relationships.length, 0)
  })
  return { sectionsProcessed: sections.length, ... }
 }
 ```
 ### YAML Importer (Hierarchical)
 ```typescript
 async extract(yamlContent: string | Buffer, options: SmartYAMLOptions = {}): Promise<SmartYAMLResult> {
  // ✅ Report parsing start
  options.onProgress?.({ processed: 0, entities: 0, relationships: 0 })
  // Parse YAML
  const yamlString = typeof yamlContent === 'string' ? yamlContent : yamlContent.toString('utf-8')
  const data = yaml.load(yamlString)
  // ✅ Report parsing complete
  options.onProgress?.({ processed: 0, entities: 0, relationships: 0 })
  // Traverse YAML structure (reports progress every 10 nodes)
  // ... similar to JSON traversal ...
  // ✅ Report completion (already implemented)
  options.onProgress?.({
    processed: nodesProcessed,
    entities: entities.length,
    relationships: relationships.length
  })
  return { nodesProcessed, entitiesExtracted: entities.length, ... }
 }
 ```
 ### DOCX Importer (Paragraph-Based)
 ```typescript
 async extract(buffer: Buffer, options: SmartDOCXOptions = {}): Promise<SmartDOCXResult> {
  // ✅ Report parsing start
  options.onProgress?.({ processed: 0, entities: 0, relationships: 0 })
  // Extract text and HTML using Mammoth
  const textResult = await mammoth.extractRawText({ buffer })
  const htmlResult = await mammoth.convertToHtml({ buffer })
  // ✅ Report parsing complete
  options.onProgress?.({ processed: 0, entities: 0, relationships: 0 })
  // Process paragraphs (reports progress every 10 paragraphs)
  const paragraphs = textResult.value.split(/\n\n+/).filter(p => p.trim().length >= minLength)
  for (let i = 0; i < paragraphs.length; i++) {
    await this.processParagraph(paragraphs[i])
    if (i % 10 === 0) {
      options.onProgress?.({
        processed: i + 1,
        entities: entities.length,
        relationships: relationships.length
      })
    }
  }
  // ✅ Report completion (already implemented)
  options.onProgress?.({
    processed: paragraphs.length,
    entities: entities.length,
    relationships: relationships.length
  })
  return { paragraphsProcessed: paragraphs.length, ... }
 }
 ```
 ---
 ## 🎯 Best Practices
 ### 1. Always Check if Hooks Exist
 Progress hooks are **optional**. Always check before calling:
 ```typescript
 // ✅ Good - safe
 if (progressHooks?.onBytesProcessed) {
  progressHooks.onBytesProcessed(bytes)
 }
 // ❌ Bad - will crash if hooks undefined
 progressHooks.onBytesProcessed(bytes)  // TypeError!
 ```
 ### 2. Report Bytes at Start and End
 ```typescript
 // ✅ Good - clear start and end
 progressHooks?.onBytesProcessed(0)              // Start
 // ... processing ...
 progressHooks?.onBytesProcessed(totalBytes)     // End
 // ❌ Bad - no clear boundaries
 // ... just start processing without reporting start
 ```
 ### 3. Throttle Frequent Updates
 ```typescript
 // ✅ Good - report every 1000 items
 for (let i = 0; i < items.length; i++) {
  processItem(items[i])
  if (i > 0 && i % 1000 === 0) {
    progressHooks?.onCurrentItem(`Processing: ${i}/${items.length}`)
  }
 }
 // ❌ Bad - report EVERY item (spam!)
 for (let i = 0; i < items.length; i++) {
  processItem(items[i])
  progressHooks?.onCurrentItem(`Processing: ${i}/${items.length}`)  // 1M callbacks!
 }
 ```
 ### 4. Provide Contextual Messages
 ```typescript
 // ✅ Good - specific and helpful
 progressHooks?.onCurrentItem('Parsing CSV rows (delimiter: ",")')
 progressHooks?.onCurrentItem('Processing page 5 of 23')
 progressHooks?.onCurrentItem('Reading sheet: Q2 Sales Data')
 // ❌ Bad - vague
 progressHooks?.onCurrentItem('Processing...')
 progressHooks?.onCurrentItem('Working...')
 ```
 ### 5. Report Data Extraction with Totals (if known)
 ```typescript
 // ✅ Good - total known
 progressHooks?.onDataExtracted(100, 1000)  // 100 of 1000 rows
 // ✅ Also good - total unknown (streaming)
 progressHooks?.onDataExtracted(100, undefined)  // 100 rows so far
 // ✅ Also good - complete
 progressHooks?.onDataExtracted(1000, 1000)  // All 1000 rows
 ```
 ---
 ## 🔧 Testing Your Handler
 ### Manual Test
 ```typescript
 import { CSVHandler } from './csvHandler.js'
 import * as fs from 'fs'
 const handler = new CSVHandler()
 const data = fs.readFileSync('./test.csv')
 const result = await handler.process(data, {
  filename: 'test.csv',
  progressHooks: {
    onBytesProcessed: (bytes) => {
      console.log(`Bytes: ${bytes}`)
    },
    onCurrentItem: (item) => {
      console.log(`Status: ${item}`)
    },
    onDataExtracted: (count, total) => {
      console.log(`Extracted: ${count}${total ? `/${total}` : ''}`)
    }
  }
 })
 console.log(`Complete: ${result.data.length} rows`)
 ```
 ### Expected Output
 ```
 Status: Detecting CSV encoding and delimiter...
 Bytes: 0
 Status: Parsing CSV rows (delimiter: ",")...
 Bytes: 52438
 Extracted: 1000/1000
 Status: Extracted 1000 rows, inferring types...
 Status: CSV processing complete: 1000 rows
 Complete: 1000 rows
 ```
 ---
 ## 📊 Progress Flow Diagram
 ```
 User Imports File
       ↓
 ImportManager
       ↓
 Creates ProgressTracker
       ↓
 Calls Handler.process() with progressHooks
       ↓
 Handler Reports Progress:
  ├─ onBytesProcessed(0)          → ProgressTracker → overall_progress calculated
  ├─ onCurrentItem("Parsing...")  → ProgressTracker → stage_message updated
  ├─ onBytesProcessed(bytes)      → ProgressTracker → bytes_per_second calculated
  ├─ onDataExtracted(count)       → ProgressTracker → entities_extracted updated
  └─ onCurrentItem("Complete")    → ProgressTracker → final progress
       ↓
 ProgressTracker emits to callback (throttled 100ms)
       ↓
 User sees:
  "Overall: 45% | PARSING | 12.5 MB/s | Parsing CSV rows..."
 ```
 ---
 ## ✅ Checklist for New Handlers
 When implementing a new file format handler:
 - [ ] Get `progressHooks` from `options`
 - [ ] Get `totalBytes` (if available)
 - [ ] Report `onBytesProcessed(0)` at start
 - [ ] Report `onCurrentItem()` for key stages
 - [ ] Report `onBytesProcessed()` as you process
 - [ ] Report `onDataExtracted()` when you extract data
 - [ ] Throttle frequent updates (every 1000 items max)
 - [ ] Report `onBytesProcessed(totalBytes)` at end
 - [ ] Report final `onCurrentItem()` with summary
 - [ ] Test with progress callback to verify output
 ---
 ## 🎓 Summary
 **The Pattern (5 Steps)**:
 1. Get `progressHooks` from options
 2. Report start (`onBytesProcessed(0)`, `onCurrentItem("Starting...")`)
 3. Report progress as you process (`onBytesProcessed(bytes)`, `onCurrentItem("Page 5...")`)
 4. Report data extraction (`onDataExtracted(count, total)`)
 5. Report completion (`onBytesProcessed(totalBytes)`, `onCurrentItem("Complete")`)
 **Always Check**: `progressHooks?.method()`
 **Throttle**: Report every N items, not every single item
 **Context**: Provide specific, helpful messages
 **Testing**: Use manual test with console.log callbacks
 ---
 **This pattern makes it trivial to add progress tracking to ANY file format. Copy this template and adapt for your handler!**
--- a/docs/guides/standard-import-progress.md
+++ b/docs/guides/standard-import-progress.md
@ -0,0 +1,453 @@
 # Standard Import Progress API
 ## ✅ Build Once, Works for ALL Formats
 **Brainy provides a 100% standardized progress API** - write your UI/tool once, and it works for all 7 supported formats (CSV, PDF, Excel, JSON, Markdown, YAML, DOCX) with **zero format-specific code**.
 ---
 ## 🎯 The Standard Interface
 ### One Interface for Everything
 ```typescript
 import { Brainy } from '@soulcraft/brainy'
 const brain = await Brainy.create()
 // THIS CODE WORKS FOR ALL 7 FORMATS - NO FORMAT-SPECIFIC LOGIC NEEDED!
 await brain.import(anyBuffer, {
  onProgress: (progress) => {
    // Standard fields - ALWAYS available regardless of format
    console.log(progress.stage)          // Current stage
    console.log(progress.message)        // Human-readable status
    // Optional fields - available when relevant
    console.log(progress.processed)      // Items processed so far
    console.log(progress.total)          // Total items (if known)
    console.log(progress.entities)       // Entities extracted
    console.log(progress.relationships)  // Relationships inferred
    console.log(progress.throughput)     // Items/sec (during extraction)
    console.log(progress.eta)            // Time remaining in ms
  }
 })
 ```
 ### The Complete Interface
 ```typescript
 interface ImportProgress {
  // === ALWAYS PRESENT ===
  /** High-level stage (5 stages for all formats) */
  stage: 'detecting' | 'extracting' | 'storing-vfs' | 'storing-graph' | 'complete'
  /** Human-readable status message */
  message: string
  // === AVAILABLE WHEN RELEVANT ===
  /** Items processed (rows, pages, nodes, etc.) */
  processed?: number
  /** Total items to process (if known ahead of time) */
  total?: number
  /** Entities extracted so far */
  entities?: number
  /** Relationships inferred so far */
  relationships?: number
  /** Processing rate (items per second) */
  throughput?: number
  /** Estimated time remaining (milliseconds) */
  eta?: number
  /** Whether data is queryable at this point (v4.2.0+) */
  queryable?: boolean
 }
 ```
 ---
 ## 🎨 Generic UI Components
 ### React Progress Component (Works for ALL Formats)
 ```typescript
 import { useState } from 'react'
 import { Brainy } from '@soulcraft/brainy'
 function UniversalImportProgress({ file }: { file: File }) {
  const [progress, setProgress] = useState({
    stage: 'idle',
    message: 'Ready to import',
    percent: 0,
    entities: 0,
    relationships: 0
  })
  const handleImport = async () => {
    const buffer = await file.arrayBuffer()
    const brain = await Brainy.create()
    await brain.import(Buffer.from(buffer), {
      // THIS WORKS FOR CSV, PDF, EXCEL, JSON, MARKDOWN, YAML, DOCX!
      onProgress: (p) => {
        setProgress({
          stage: p.stage,
          message: p.message,
          // Calculate percentage from stage + processed/total
          percent: calculatePercent(p),
          entities: p.entities || 0,
          relationships: p.relationships || 0
        })
      }
    })
  }
  // Helper: Calculate percentage from progress
  function calculatePercent(p: ImportProgress): number {
    // Use processed/total if available
    if (p.processed && p.total) {
      return Math.round((p.processed / p.total) * 100)
    }
    // Otherwise estimate from stage
    const stagePercents = {
      detecting: 5,
      extracting: 50,
      'storing-vfs': 80,
      'storing-graph': 90,
      complete: 100
    }
    return stagePercents[p.stage] || 0
  }
  return (
    <div className="import-progress">
      {/* Stage Indicator */}
      <div className="stages">
        {['detecting', 'extracting', 'storing-vfs', 'storing-graph', 'complete'].map(s => (
          <span
            key={s}
            className={progress.stage === s ? 'active' : ''}
          >
            {s}
          </span>
        ))}
      </div>
      {/* Progress Bar */}
      <div className="progress-bar">
        <div style={{ width: `${progress.percent}%` }} />
      </div>
      {/* Status Message (format-specific but always readable) */}
      <p className="message">{progress.message}</p>
      {/* Counts */}
      <div className="counts">
        <span>Entities: {progress.entities}</span>
        <span>Relationships: {progress.relationships}</span>
      </div>
    </div>
  )
 }
 ```
 **This component works perfectly for:**
 - ✅ CSV files with 10,000 rows
 - ✅ PDF documents with 200 pages
 - ✅ Excel workbooks with 5 sheets
 - ✅ JSON files with nested structures
 - ✅ Markdown documents with sections
 - ✅ YAML configuration files
 - ✅ DOCX documents with paragraphs
 **No format detection needed. No format-specific rendering. Just works.**
 ---
 ### CLI Progress Indicator (Works for ALL Formats)
 ```typescript
 import ora from 'ora'
 import { Brainy } from '@soulcraft/brainy'
 async function importWithProgress(filePath: string) {
  const spinner = ora('Starting import...').start()
  const brain = await Brainy.create()
  try {
    await brain.import(filePath, {
      // THIS WORKS FOR ALL 7 FORMATS!
      onProgress: (p) => {
        // Update spinner text with current message
        spinner.text = p.message
        // Add counts if available
        if (p.entities || p.relationships) {
          spinner.text += ` (${p.entities || 0} entities, ${p.relationships || 0} relationships)`
        }
        // Add throughput/ETA if available (during extraction)
        if (p.throughput && p.eta) {
          const etaSec = Math.round(p.eta / 1000)
          spinner.text += ` [${p.throughput.toFixed(1)}/sec, ETA: ${etaSec}s]`
        }
        // Change spinner when complete
        if (p.stage === 'complete') {
          spinner.succeed(p.message)
        }
      }
    })
  } catch (error) {
    spinner.fail(`Import failed: ${error.message}`)
  }
 }
 // Works for ANY format!
 await importWithProgress('data.csv')
 await importWithProgress('document.pdf')
 await importWithProgress('workbook.xlsx')
 await importWithProgress('config.yaml')
 ```
 **CLI Output (same code, different formats):**
 ```bash
 # CSV Import
 ⠋ Detecting format...
 ⠙ Parsing CSV rows (delimiter: ",")
 ⠹ Extracting entities from csv (45 rows/sec, ETA: 120s) (150 entities, 45 relationships)
 ⠸ Extracting entities from csv (45 rows/sec, ETA: 60s) (750 entities, 223 relationships)
 ✔ Import complete (1350 entities, 401 relationships)
 # PDF Import
 ⠋ Detecting format...
 ⠙ Loading PDF document...
 ⠹ Processing page 5 of 23
 ⠸ Extracting entities from pdf (2.5 pages/sec, ETA: 30s) (45 entities, 12 relationships)
 ✔ Import complete (156 entities, 89 relationships)
 # Excel Import
 ⠋ Detecting format...
 ⠙ Loading Excel workbook...
 ⠹ Reading sheet: Sales (2/5)
 ⠸ Extracting entities from excel (120 rows/sec, ETA: 45s) (500 entities, 234 relationships)
 ✔ Import complete (2340 entities, 892 relationships)
 ```
 **Same code. Different formats. Perfect progress for all.**
 ---
 ### Dashboard with Real-Time Stats (Works for ALL Formats)
 ```typescript
 function ImportDashboard() {
  const [stats, setStats] = useState({
    stage: '',
    message: '',
    elapsed: 0,
    entities: 0,
    relationships: 0,
    throughput: 0,
    eta: 0
  })
  const startTime = Date.now()
  const handleImport = async (file: File) => {
    await brain.import(await file.arrayBuffer(), {
      // UNIVERSAL PROGRESS HANDLER - WORKS FOR ALL FORMATS!
      onProgress: (p) => {
        setStats({
          stage: p.stage,
          message: p.message,
          elapsed: Date.now() - startTime,
          entities: p.entities || 0,
          relationships: p.relationships || 0,
          throughput: p.throughput || 0,
          eta: p.eta || 0
        })
      }
    })
  }
  return (
    <div className="dashboard">
      <h2>Import Progress</h2>
      <div className="metric">
        <label>Stage</label>
        <value>{stats.stage}</value>
      </div>
      <div className="metric">
        <label>Status</label>
        <value>{stats.message}</value>
      </div>
      <div className="metric">
        <label>Elapsed</label>
        <value>{(stats.elapsed / 1000).toFixed(1)}s</value>
      </div>
      <div className="metric">
        <label>Entities</label>
        <value>{stats.entities.toLocaleString()}</value>
      </div>
      <div className="metric">
        <label>Relationships</label>
        <value>{stats.relationships.toLocaleString()}</value>
      </div>
      {stats.throughput > 0 && (
        <div className="metric">
          <label>Throughput</label>
          <value>{stats.throughput.toFixed(1)} items/sec</value>
        </div>
      )}
      {stats.eta > 0 && (
        <div className="metric">
          <label>ETA</label>
          <value>{(stats.eta / 1000).toFixed(0)}s</value>
        </div>
      )}
    </div>
  )
 }
 ```
 **This dashboard shows live stats for ANY format** - CSV, PDF, Excel, JSON, Markdown, YAML, DOCX.
 ---
 ## 📊 What Messages Look Like (Format-Specific Text, Standard Fields)
 While the **fields are standardized**, the **message text** varies by format to be most helpful:
 ```typescript
 // CSV Import Messages
 "Detecting format..."
 "Parsing CSV rows (delimiter: ",")"
 "Extracted 1000 rows, inferring types..."
 "Extracting entities from csv (45 rows/sec, ETA: 120s)..."
 "Creating VFS structure..."
 "Import complete"
 // PDF Import Messages
 "Detecting format..."
 "Loading PDF document..."
 "Processing page 5 of 23"
 "Extracting entities from pdf (2.5 pages/sec, ETA: 30s)..."
 "Creating VFS structure..."
 "Import complete"
 // Excel Import Messages
 "Detecting format..."
 "Loading Excel workbook..."
 "Reading sheet: Sales (2/5)"
 "Extracting entities from excel (120 rows/sec, ETA: 45s)..."
 "Creating VFS structure..."
 "Import complete"
 ```
 **Key Point:** You can display `progress.message` directly in your UI **without parsing it**. It's always human-readable and contextually appropriate.
 ---
 ## ✅ The 5 Standard Stages (Same for ALL Formats)
 Every import goes through these 5 stages in order:
 | Stage | Duration | Description | Fields Available |
 |-------|----------|-------------|------------------|
 | **detecting** | ~1% | Format detection | `stage`, `message` |
 | **extracting** | ~70% | Parse file + AI extraction | `stage`, `message`, `processed`, `total`, `entities`, `relationships`, `throughput`, `eta` |
 | **storing-vfs** | ~5% | Create file structure | `stage`, `message` |
 | **storing-graph** | ~20% | Create graph nodes | `stage`, `message`, `entities`, `relationships` |
 | **complete** | ~1% | Finalize | `stage`, `message`, `entities`, `relationships` |
 **These 5 stages are the same whether you're importing:**
 - A 10MB CSV file with 50,000 rows
 - A 200-page PDF document
 - A 5-sheet Excel workbook
 - A nested JSON structure
 - A Markdown document
 - A YAML configuration
 - A DOCX document
 ---
 ## 🎯 Why This Matters
 ### Build Tools That Work for Everything
 ```typescript
 // ONE progress handler for your entire application
 function universalProgressHandler(progress: ImportProgress) {
  // Update UI (works for all formats)
  updateProgressBar(progress)
  updateStatusText(progress.message)
  updateCounts(progress.entities, progress.relationships)
  // Log to analytics (works for all formats)
  analytics.track('import_progress', {
    stage: progress.stage,
    processed: progress.processed,
    total: progress.total
  })
  // Send to monitoring (works for all formats)
  monitoring.gauge('import.entities', progress.entities)
  monitoring.gauge('import.throughput', progress.throughput)
 }
 // Use it everywhere
 await brain.import(csvFile, { onProgress: universalProgressHandler })
 await brain.import(pdfFile, { onProgress: universalProgressHandler })
 await brain.import(excelFile, { onProgress: universalProgressHandler })
 await brain.import(jsonFile, { onProgress: universalProgressHandler })
 ```
 ### No Format Detection Needed
 ```typescript
 // ❌ DON'T DO THIS (format-specific handling)
 if (format === 'csv') {
  // CSV-specific progress code
 } else if (format === 'pdf') {
  // PDF-specific progress code
 } else if (format === 'excel') {
  // Excel-specific progress code
 }
 // ✅ DO THIS (universal handling)
 onProgress: (p) => {
  // Works for ALL formats!
  updateUI(p.stage, p.message, p.entities, p.relationships)
 }
 ```
 ---
 ## 📝 Summary
 ✅ **100% Standardized** - Same `ImportProgress` interface for all 7 formats
 ✅ **Build Once** - Your progress UI works for CSV, PDF, Excel, JSON, Markdown, YAML, DOCX
 ✅ **No Format Detection** - No need to check file type in your progress handler
 ✅ **Human-Readable Messages** - Display `progress.message` directly, no parsing needed
 ✅ **Standard Fields** - `stage`, `processed`, `total`, `entities`, `relationships` work everywhere
 ✅ **Optional Enhancements** - `throughput`, `eta` available during extraction (all formats)
 **The Workshop team (and any developer) can now build monitoring tools, dashboards, CLIs, and UIs that work perfectly for all import formats with zero format-specific code!**
--- a/src/augmentations/intelligentImport/handlers/csvHandler.ts
+++ b/src/augmentations/intelligentImport/handlers/csvHandler.ts
@ -34,9 +34,19 @@ export class CSVHandler extends BaseFormatHandler {
  async process(data: Buffer | string, options: FormatHandlerOptions): Promise<ProcessedData> {
    const startTime = Date.now()
    const progressHooks = options.progressHooks
    // Convert to buffer if string
    const buffer = Buffer.isBuffer(data) ? data : Buffer.from(data, 'utf-8')
    const totalBytes = buffer.length
    // v4.5.0: Report total bytes for progress tracking
    if (progressHooks?.onBytesProcessed) {
      progressHooks.onBytesProcessed(0)
    }
    if (progressHooks?.onCurrentItem) {
      progressHooks.onCurrentItem('Detecting CSV encoding and delimiter...')
    }
    // Detect encoding
    const detectedEncoding = options.encoding || this.detectEncodingSafe(buffer)
@ -45,6 +55,11 @@ export class CSVHandler extends BaseFormatHandler {
    // Detect delimiter if not specified
    const delimiter = options.csvDelimiter || this.detectDelimiter(text)
    // v4.5.0: Report progress - parsing started
    if (progressHooks?.onCurrentItem) {
      progressHooks.onCurrentItem(`Parsing CSV rows (delimiter: "${delimiter}")...`)
    }
    // Parse CSV
    const hasHeaders = options.csvHeaders !== false
    const maxRows = options.maxRows
@ -60,23 +75,47 @@ export class CSVHandler extends BaseFormatHandler {
        cast: false // We'll do type inference ourselves
      })
      // v4.5.0: Report bytes processed (entire file parsed)
      if (progressHooks?.onBytesProcessed) {
        progressHooks.onBytesProcessed(totalBytes)
      }
      // Convert to array of objects
      const data = Array.isArray(records) ? records : [records]
      // v4.5.0: Report data extraction progress
      if (progressHooks?.onDataExtracted) {
        progressHooks.onDataExtracted(data.length, data.length)
      }
      if (progressHooks?.onCurrentItem) {
        progressHooks.onCurrentItem(`Extracted ${data.length} rows, inferring types...`)
      }
      // Infer types and convert values
      const fields = data.length > 0 ? Object.keys(data[0]) : []
      const types = this.inferFieldTypes(data)
-      const convertedData = data.map(row => {
+      const convertedData = data.map((row, index) => {
        const converted: Record<string, any> = {}
        for (const [key, value] of Object.entries(row)) {
          converted[key] = this.convertValue(value, types[key] || 'string')
        }
        // v4.5.0: Report progress every 1000 rows
        if (progressHooks?.onCurrentItem && index > 0 && index % 1000 === 0) {
          progressHooks.onCurrentItem(`Converting types: ${index}/${data.length} rows...`)
        }
        return converted
      })
      const processingTime = Date.now() - startTime
      // v4.5.0: Final progress update
      if (progressHooks?.onCurrentItem) {
        progressHooks.onCurrentItem(`CSV processing complete: ${convertedData.length} rows`)
      }
      return {
        format: this.format,
        data: convertedData,
--- a/src/augmentations/intelligentImport/handlers/excelHandler.ts
+++ b/src/augmentations/intelligentImport/handlers/excelHandler.ts
@ -21,9 +21,19 @@ export class ExcelHandler extends BaseFormatHandler {
  async process(data: Buffer | string, options: FormatHandlerOptions): Promise<ProcessedData> {
    const startTime = Date.now()
    const progressHooks = options.progressHooks
    // Convert to buffer if string (though Excel should always be binary)
    const buffer = Buffer.isBuffer(data) ? data : Buffer.from(data, 'binary')
    const totalBytes = buffer.length
    // v4.5.0: Report start
    if (progressHooks?.onBytesProcessed) {
      progressHooks.onBytesProcessed(0)
    }
    if (progressHooks?.onCurrentItem) {
      progressHooks.onCurrentItem('Loading Excel workbook...')
    }
    try {
      // Read workbook
@ -37,11 +47,25 @@ export class ExcelHandler extends BaseFormatHandler {
      // Determine which sheets to process
      const sheetsToProcess = this.getSheetsToProcess(workbook, options)
      // v4.5.0: Report workbook loaded
      if (progressHooks?.onCurrentItem) {
        progressHooks.onCurrentItem(`Processing ${sheetsToProcess.length} sheets...`)
      }
      // Extract data from sheets
      const allData: Array<Record<string, any>> = []
      const sheetMetadata: Record<string, any> = {}
-      for (const sheetName of sheetsToProcess) {
+      for (let sheetIndex = 0; sheetIndex < sheetsToProcess.length; sheetIndex++) {
        const sheetName = sheetsToProcess[sheetIndex]
        // v4.5.0: Report current sheet
        if (progressHooks?.onCurrentItem) {
          progressHooks.onCurrentItem(
            `Reading sheet: ${sheetName} (${sheetIndex + 1}/${sheetsToProcess.length})`
          )
        }
        const sheet = workbook.Sheets[sheetName]
        if (!sheet) continue
@ -92,6 +116,25 @@ export class ExcelHandler extends BaseFormatHandler {
          columnCount: headers.length,
          headers
        }
        // v4.5.0: Estimate bytes processed (sheets are sequential)
        const bytesProcessed = Math.floor(((sheetIndex + 1) / sheetsToProcess.length) * totalBytes)
        if (progressHooks?.onBytesProcessed) {
          progressHooks.onBytesProcessed(bytesProcessed)
        }
        // v4.5.0: Report extraction progress
        if (progressHooks?.onDataExtracted) {
          progressHooks.onDataExtracted(allData.length, undefined) // Total unknown until complete
        }
      }
      // v4.5.0: Report data extraction complete
      if (progressHooks?.onCurrentItem) {
        progressHooks.onCurrentItem(`Extracted ${allData.length} rows, inferring types...`)
      }
      if (progressHooks?.onDataExtracted) {
        progressHooks.onDataExtracted(allData.length, allData.length)
      }
      // Infer types (excluding _sheet field)
@ -99,7 +142,7 @@ export class ExcelHandler extends BaseFormatHandler {
      const types = this.inferFieldTypes(allData)
      // Convert values to appropriate types
-      const convertedData = allData.map(row => {
+      const convertedData = allData.map((row, index) => {
        const converted: Record<string, any> = {}
        for (const [key, value] of Object.entries(row)) {
          if (key === '_sheet') {
@ -108,11 +151,29 @@ export class ExcelHandler extends BaseFormatHandler {
            converted[key] = this.convertValue(value, types[key] || 'string')
          }
        }
        // v4.5.0: Report progress every 1000 rows (avoid spam)
        if (progressHooks?.onCurrentItem && index > 0 && index % 1000 === 0) {
          progressHooks.onCurrentItem(`Converting types: ${index}/${allData.length} rows...`)
        }
        return converted
      })
      // v4.5.0: Final progress - all bytes processed
      if (progressHooks?.onBytesProcessed) {
        progressHooks.onBytesProcessed(totalBytes)
      }
      const processingTime = Date.now() - startTime
      // v4.5.0: Report completion
      if (progressHooks?.onCurrentItem) {
        progressHooks.onCurrentItem(
          `Excel complete: ${sheetsToProcess.length} sheets, ${convertedData.length} rows`
        )
      }
      return {
        format: this.format,
        data: convertedData,
--- a/src/augmentations/intelligentImport/handlers/pdfHandler.ts
+++ b/src/augmentations/intelligentImport/handlers/pdfHandler.ts
@ -46,9 +46,19 @@ export class PDFHandler extends BaseFormatHandler {
  async process(data: Buffer | string, options: FormatHandlerOptions): Promise<ProcessedData> {
    const startTime = Date.now()
    const progressHooks = options.progressHooks
    // Convert to buffer
    const buffer = Buffer.isBuffer(data) ? data : Buffer.from(data, 'binary')
    const totalBytes = buffer.length
    // v4.5.0: Report start
    if (progressHooks?.onBytesProcessed) {
      progressHooks.onBytesProcessed(0)
    }
    if (progressHooks?.onCurrentItem) {
      progressHooks.onCurrentItem('Loading PDF document...')
    }
    try {
      // Load PDF document
@ -64,12 +74,22 @@ export class PDFHandler extends BaseFormatHandler {
      const metadata = await pdfDoc.getMetadata()
      const numPages = pdfDoc.numPages
      // v4.5.0: Report document loaded
      if (progressHooks?.onCurrentItem) {
        progressHooks.onCurrentItem(`Processing ${numPages} pages...`)
      }
      // Extract text and structure from all pages
      const allData: Array<Record<string, any>> = []
      let totalTextLength = 0
      let detectedTables = 0
      for (let pageNum = 1; pageNum <= numPages; pageNum++) {
        // v4.5.0: Report current page
        if (progressHooks?.onCurrentItem) {
          progressHooks.onCurrentItem(`Processing page ${pageNum} of ${numPages}`)
        }
        const page = await pdfDoc.getPage(pageNum)
        const textContent = await page.getTextContent()
@ -110,10 +130,36 @@ export class PDFHandler extends BaseFormatHandler {
            })
          }
        }
        // v4.5.0: Estimate bytes processed (pages are sequential)
        const bytesProcessed = Math.floor((pageNum / numPages) * totalBytes)
        if (progressHooks?.onBytesProcessed) {
          progressHooks.onBytesProcessed(bytesProcessed)
        }
        // v4.5.0: Report extraction progress
        if (progressHooks?.onDataExtracted) {
          progressHooks.onDataExtracted(allData.length, undefined) // Total unknown until complete
        }
      }
      // v4.5.0: Final progress - all bytes processed
      if (progressHooks?.onBytesProcessed) {
        progressHooks.onBytesProcessed(totalBytes)
      }
      if (progressHooks?.onDataExtracted) {
        progressHooks.onDataExtracted(allData.length, allData.length)
      }
      const processingTime = Date.now() - startTime
      // v4.5.0: Report completion
      if (progressHooks?.onCurrentItem) {
        progressHooks.onCurrentItem(
          `PDF complete: ${numPages} pages, ${allData.length} items extracted`
        )
      }
      // Get all unique fields (excluding metadata fields)
      const fields = allData.length > 0
        ? Object.keys(allData[0]).filter(k => !k.startsWith('_'))
--- a/src/augmentations/intelligentImport/types.ts
+++ b/src/augmentations/intelligentImport/types.ts
@ -3,6 +3,34 @@
 * Handles Excel, PDF, and CSV import with intelligent extraction
 */
 import { ImportProgressTracker } from '../../utils/import-progress-tracker.js'
 /**
 * Progress hooks for format handlers
 *
 * Handlers call these hooks to report progress during processing.
 * This enables real-time progress tracking for any file format.
 */
 export interface FormatHandlerProgressHooks {
  /**
   * Report bytes processed
   * Call this as you read/parse the file
   */
  onBytesProcessed?: (bytes: number) => void
  /**
   * Set current processing context
   * Examples: "Processing page 5", "Reading sheet: Q2 Sales"
   */
  onCurrentItem?: (item: string) => void
  /**
   * Report structured data extraction progress
   * Examples: "Extracted 100 rows", "Parsed 50 paragraphs"
   */
  onDataExtracted?: (count: number, total?: number) => void
 }
 export interface FormatHandler {
  /**
   * Format name (e.g., 'csv', 'xlsx', 'pdf')
@ -58,6 +86,18 @@ export interface FormatHandlerOptions {
  /** Whether to stream large files */
  streaming?: boolean
  /**
   * Progress hooks (v4.5.0)
   * Handlers call these to report progress during processing
   */
  progressHooks?: FormatHandlerProgressHooks
  /**
   * Total file size in bytes (v4.5.0)
   * Used for progress percentage calculation
   */
  totalBytes?: number
 }
 export interface ProcessedData {
--- a/src/brainy.ts
+++ b/src/brainy.ts
@ -2039,9 +2039,27 @@ export class Brainy<T = any> implements BrainyInterface<T> {
   *   groupBy: 'type',                   // Organize by entity type
   *   preserveSource: true,              // Keep original file
   *
-   *   // Progress tracking
+   *   // Progress tracking (v4.5.0 - STANDARDIZED FOR ALL 7 FORMATS!)
-   *   onProgress: (p) => console.log(p.message)
+   *   onProgress: (p) => {
   *     console.log(`[${p.stage}] ${p.message}`)
   *     console.log(`Entities: ${p.entities || 0}, Rels: ${p.relationships || 0}`)
   *     if (p.throughput) console.log(`Rate: ${p.throughput.toFixed(1)}/sec`)
   *   }
   * })
   * // THIS SAME HANDLER WORKS FOR CSV, PDF, Excel, JSON, Markdown, YAML, DOCX!
   * ```
   *
   * @example Universal Progress Handler (v4.5.0)
   * ```typescript
   * // ONE handler for ALL 7 formats - no format-specific code needed!
   * const universalProgress = (p) => {
   *   updateUI(p.stage, p.message, p.entities, p.relationships)
   * }
   *
   * await brain.import(csvBuffer, { onProgress: universalProgress })
   * await brain.import(pdfBuffer, { onProgress: universalProgress })
   * await brain.import(excelBuffer, { onProgress: universalProgress })
   * // Works for JSON, Markdown, YAML, DOCX too!
   * ```
   *
   * @example Performance Tuning (Large Files)
@ -2066,6 +2084,7 @@ export class Brainy<T = any> implements BrainyInterface<T> {
   *
   * @see {@link https://brainy.dev/docs/api/import API Documentation}
   * @see {@link https://brainy.dev/docs/guides/migrating-to-v4 Migration Guide}
   * @see {@link https://brainy.dev/docs/guides/standard-import-progress Standard Progress API (v4.5.0)}
   *
   * @remarks
   * **⚠️ Breaking Changes from v3.x:**
@ -2098,7 +2117,7 @@ export class Brainy<T = any> implements BrainyInterface<T> {
  async import(
    source: Buffer | string | object,
    options?: {
-      format?: 'excel' | 'pdf' | 'csv' | 'json' | 'markdown'
+      format?: 'excel' | 'pdf' | 'csv' | 'json' | 'markdown' | 'yaml' | 'docx'
      vfsPath?: string
      groupBy?: 'type' | 'sheet' | 'flat' | 'custom'
      customGrouping?: (entity: any) => string
--- a/src/cli/commands/core.ts
+++ b/src/cli/commands/core.ts
@ -21,6 +21,8 @@ interface AddOptions extends CoreOptions {
  id?: string
  metadata?: string
  type?: string
  confidence?: string
  weight?: string
 }
 interface SearchOptions extends CoreOptions {
@ -35,6 +37,7 @@ interface SearchOptions extends CoreOptions {
  via?: string
  explain?: boolean
  includeRelations?: boolean
  includeVfs?: boolean
  fusion?: string
  vectorWeight?: string
  graphWeight?: string
@ -163,11 +166,21 @@ export const coreCommands = {
      }
      // Add with explicit type
-      const result = await brain.add({
+      const addParams: any = {
        data: text,
        type: nounType,
        metadata
-      })
+      }
      // v4.3.x: Add confidence and weight if provided
      if (options.confidence) {
        addParams.confidence = parseFloat(options.confidence)
      }
      if (options.weight) {
        addParams.weight = parseFloat(options.weight)
      }
      const result = await brain.add(addParams)
      spinner.succeed('Added successfully')
@ -176,11 +189,17 @@ export const coreCommands = {
        if (options.type) {
          console.log(chalk.dim(`  Type: ${options.type}`))
        }
        if (options.confidence) {
          console.log(chalk.dim(`  Confidence: ${options.confidence}`))
        }
        if (options.weight) {
          console.log(chalk.dim(`  Weight: ${options.weight}`))
        }
        if (Object.keys(metadata).length > 0) {
          console.log(chalk.dim(`  Metadata: ${JSON.stringify(metadata)}`))
        }
      } else {
-        formatOutput({ id: result, metadata }, options)
+        formatOutput({ id: result, metadata, confidence: addParams.confidence, weight: addParams.weight }, options)
      }
    } catch (error: any) {
      if (spinner) spinner.fail('Failed to add data')
@ -328,6 +347,11 @@ export const coreCommands = {
        searchParams.includeRelations = true
      }
      // Include VFS files (v4.4.0 - find excludes VFS by default)
      if (options.includeVfs) {
        searchParams.includeVFS = true
      }
      // Triple Intelligence Fusion - custom weighting
      if (options.fusion || options.vectorWeight || options.graphWeight || options.fieldWeight) {
        searchParams.fusion = {
--- a/src/cli/commands/import.ts
+++ b/src/cli/commands/import.ts
@ -149,23 +149,28 @@ export const importCommands = {
        options.recursive = answer.recursive
      }
-      spinner = ora('Initializing neural import...').start()
+      spinner = ora('Initializing import...').start()
      const brain = getBrainy()
      // Load UniversalImportAPI
      const { UniversalImportAPI } = await import('../../api/UniversalImportAPI.js')
      const universalImport = new UniversalImportAPI(brain)
      await universalImport.init()
      spinner.text = 'Processing import...'
      // Handle different source types
      let result: any
      if (isURL) {
-        // URL import
+        // URL import - fetch first
        spinner.text = `Fetching from ${source}...`
-        result = await universalImport.importFromURL(source)
+        const response = await fetch(source)
        const buffer = Buffer.from(await response.arrayBuffer())
        spinner.text = 'Importing...'
        result = await brain.import(buffer, {
          enableNeuralExtraction: options.extractEntities !== false,
          enableRelationshipInference: options.detectRelationships !== false,
          enableConceptExtraction: options.extractConcepts || false,
          confidenceThreshold: options.confidence ? parseFloat(options.confidence) : 0.6,
          onProgress: options.progress ? (p) => {
            spinner.text = `${p.message}${p.entities ? ` (${p.entities} entities)` : ''}`
          } : undefined
        })
      } else if (isDirectory) {
        // Directory import - process each file
        spinner.text = `Scanning directory: ${source}...`
@ -202,34 +207,45 @@ export const importCommands = {
        spinner.succeed(`Found ${files.length} files`)
-        // Process files in batches
+        // Process files with progress
        const batchSize = options.batchSize ? parseInt(options.batchSize) : 100
        let totalEntities = 0
        let totalRelationships = 0
        let filesProcessed = 0
-        for (let i = 0; i < files.length; i += batchSize) {
+        for (const file of files) {
-          const batch = files.slice(i, i + batchSize)
+          try {
            if (options.progress) {
              spinner = ora(`[${filesProcessed + 1}/${files.length}] Importing ${file}...`).start()
            }
-          if (options.progress) {
+            const fileResult = await brain.import(file, {
-            spinner = ora(`Processing batch ${Math.floor(i / batchSize) + 1}/${Math.ceil(files.length / batchSize)} (${filesProcessed}/${files.length} files)...`).start()
+              enableNeuralExtraction: options.extractEntities !== false,
-          }
+              enableRelationshipInference: options.detectRelationships !== false,
              enableConceptExtraction: options.extractConcepts || false,
              confidenceThreshold: options.confidence ? parseFloat(options.confidence) : 0.6,
              onProgress: options.progress ? (p) => {
                spinner.text = `[${filesProcessed + 1}/${files.length}] ${p.message}`
              } : undefined
            })
-          for (const file of batch) {
+            totalEntities += fileResult.entities.length
-            try {
+            totalRelationships += fileResult.relationships.length
-              const fileResult = await universalImport.importFromFile(file)
+            filesProcessed++
-              totalEntities += fileResult.stats.entitiesCreated
+
-              totalRelationships += fileResult.stats.relationshipsCreated
+            if (options.progress) {
-              filesProcessed++
+              spinner.succeed(`[${filesProcessed}/${files.length}] ${file}`)
-            } catch (error: any) {
+            }
-              if (options.verbose) {
+          } catch (error: any) {
-                console.log(chalk.yellow(`⚠️  Failed to import ${file}: ${error.message}`))
+            if (options.verbose) {
-              }
+              if (spinner) spinner.fail(`Failed: ${file}`)
              console.log(chalk.yellow(`⚠️  ${error.message}`))
            }
          }
        }
        result = {
          entities: [],
          relationships: [],
          stats: {
            filesProcessed,
            entitiesCreated: totalEntities,
@ -238,10 +254,22 @@ export const importCommands = {
          }
        }
-        spinner.succeed('Directory import complete')
+        spinner = ora().succeed(`Directory import complete: ${filesProcessed} files`)
      } else {
-        // File import
+        // File import with progress
-        result = await universalImport.importFromFile(source)
+        result = await brain.import(source, {
          format: options.format as any,
          enableNeuralExtraction: options.extractEntities !== false,
          enableRelationshipInference: options.detectRelationships !== false,
          enableConceptExtraction: options.extractConcepts || false,
          confidenceThreshold: options.confidence ? parseFloat(options.confidence) : 0.6,
          onProgress: options.progress ? (p) => {
            spinner.text = `${p.message}${p.entities ? ` (${p.entities} entities, ${p.relationships || 0} relationships)` : ''}`
            if (p.throughput && p.eta) {
              spinner.text += ` - ${p.throughput.toFixed(1)}/sec, ETA: ${Math.round(p.eta / 1000)}s`
            }
          } : undefined
        })
      }
      spinner.succeed('Import complete')
@ -323,18 +351,26 @@ export const importCommands = {
        console.log(chalk.cyan('\n📊 Import Results:\n'))
        console.log(chalk.bold('Statistics:'))
-        console.log(`  Entities created: ${chalk.green(result.stats.entitiesCreated)}`)
+        const entitiesCount = result.stats?.entitiesCreated || result.entities?.length || 0
        const relationshipsCount = result.stats?.relationshipsCreated || result.relationships?.length || 0
-        if (result.stats.relationshipsCreated > 0) {
+        console.log(`  Entities created: ${chalk.green(entitiesCount)}`)
-          console.log(`  Relationships created: ${chalk.green(result.stats.relationshipsCreated)}`)
+
        if (relationshipsCount > 0) {
          console.log(`  Relationships created: ${chalk.green(relationshipsCount)}`)
        }
-        if (result.stats.filesProcessed) {
+        if (result.stats?.filesProcessed) {
          console.log(`  Files processed: ${chalk.green(result.stats.filesProcessed)}`)
        }
-        console.log(`  Average confidence: ${chalk.yellow((result.stats.averageConfidence * 100).toFixed(1))}%`)
+        if (result.stats?.averageConfidence) {
-        console.log(`  Processing time: ${chalk.dim(result.stats.processingTimeMs)}ms`)
+          console.log(`  Average confidence: ${chalk.yellow((result.stats.averageConfidence * 100).toFixed(1))}%`)
        }
        if (result.stats?.processingTimeMs) {
          console.log(`  Processing time: ${chalk.dim(result.stats.processingTimeMs)}ms`)
        }
        if (options.verbose && result.entities && result.entities.length > 0) {
          console.log(chalk.bold('\n📦 Imported Entities (first 10):'))
--- a/src/importers/SmartCSVImporter.ts
+++ b/src/importers/SmartCSVImporter.ts
@ -169,10 +169,44 @@ export class SmartCSVImporter {
    }
    // Parse CSV using existing handler
    // v4.5.0: Pass progress hooks to handler for file parsing progress
    const processedData = await this.csvHandler.process(buffer, {
      ...options,
      csvDelimiter: opts.csvDelimiter,
-      csvHeaders: opts.csvHeaders
+      csvHeaders: opts.csvHeaders,
      totalBytes: buffer.length,
      progressHooks: {
        onBytesProcessed: (bytes) => {
          // Handler reports bytes processed during parsing
          opts.onProgress?.({
            processed: 0,
            total: 0,
            entities: 0,
            relationships: 0,
            phase: `Parsing CSV (${Math.round((bytes / buffer.length) * 100)}%)`
          })
        },
        onCurrentItem: (message) => {
          // Handler reports current processing step
          opts.onProgress?.({
            processed: 0,
            total: 0,
            entities: 0,
            relationships: 0,
            phase: message
          })
        },
        onDataExtracted: (count, total) => {
          // Handler reports rows extracted
          opts.onProgress?.({
            processed: 0,
            total: total || count,
            entities: 0,
            relationships: 0,
            phase: `Extracted ${count} rows`
          })
        }
      }
    })
    const rows = processedData.data
--- a/src/importers/SmartDOCXImporter.ts
+++ b/src/importers/SmartDOCXImporter.ts
@ -187,12 +187,26 @@ export class SmartDOCXImporter {
      await this.init()
    }
    // v4.5.0: Report parsing start
    options.onProgress?.({
      processed: 0,
      entities: 0,
      relationships: 0
    })
    // Extract raw text for entity extraction
    const textResult = await mammoth.extractRawText({ buffer })
    // Extract HTML for structure analysis (headings, tables)
    const htmlResult = await mammoth.convertToHtml({ buffer })
    // v4.5.0: Report parsing complete
    options.onProgress?.({
      processed: 0,
      entities: 0,
      relationships: 0
    })
    // Process the document
    const result = await this.extractFromContent(
      textResult.value,
--- a/src/importers/SmartExcelImporter.ts
+++ b/src/importers/SmartExcelImporter.ts
@ -184,7 +184,43 @@ export class SmartExcelImporter {
    }
    // Parse Excel using existing handler
-    const processedData = await this.excelHandler.process(buffer, options)
+    // v4.5.0: Pass progress hooks to handler for file parsing progress
    const processedData = await this.excelHandler.process(buffer, {
      ...options,
      totalBytes: buffer.length,
      progressHooks: {
        onBytesProcessed: (bytes) => {
          // Handler reports bytes processed during parsing
          opts.onProgress?.({
            processed: 0,
            total: 0,
            entities: 0,
            relationships: 0,
            phase: `Parsing Excel (${Math.round((bytes / buffer.length) * 100)}%)`
          })
        },
        onCurrentItem: (message) => {
          // Handler reports current processing step (e.g., "Reading sheet: Sales (1/3)")
          opts.onProgress?.({
            processed: 0,
            total: 0,
            entities: 0,
            relationships: 0,
            phase: message
          })
        },
        onDataExtracted: (count, total) => {
          // Handler reports rows extracted
          opts.onProgress?.({
            processed: 0,
            total: total || count,
            entities: 0,
            relationships: 0,
            phase: `Extracted ${count} rows from Excel`
          })
        }
      }
    })
    const rows = processedData.data
    if (rows.length === 0) {
--- a/src/importers/SmartJSONImporter.ts
+++ b/src/importers/SmartJSONImporter.ts
@ -167,6 +167,13 @@ export class SmartJSONImporter {
      ...options
    }
    // v4.5.0: Report parsing start
    opts.onProgress({
      processed: 0,
      entities: 0,
      relationships: 0
    })
    // Parse JSON if string
    let jsonData: any
    if (typeof data === 'string') {
@ -179,6 +186,13 @@ export class SmartJSONImporter {
      jsonData = data
    }
    // v4.5.0: Report parsing complete, starting traversal
    opts.onProgress({
      processed: 0,
      entities: 0,
      relationships: 0
    })
    // Traverse and extract
    const entities: ExtractedJSONEntity[] = []
    const relationships: ExtractedJSONRelationship[] = []
@ -214,6 +228,13 @@ export class SmartJSONImporter {
      }
    )
    // v4.5.0: Report completion
    opts.onProgress({
      processed: nodesProcessed,
      entities: entities.length,
      relationships: relationships.length
    })
    return {
      nodesProcessed,
      entitiesExtracted: entities.length,
--- a/src/importers/SmartMarkdownImporter.ts
+++ b/src/importers/SmartMarkdownImporter.ts
@ -174,9 +174,25 @@ export class SmartMarkdownImporter {
      ...options
    }
    // v4.5.0: Report parsing start
    opts.onProgress({
      processed: 0,
      total: 0,
      entities: 0,
      relationships: 0
    })
    // Parse markdown into sections
    const parsedSections = this.parseMarkdown(markdown, opts)
    // v4.5.0: Report parsing complete
    opts.onProgress({
      processed: 0,
      total: parsedSections.length,
      entities: 0,
      relationships: 0
    })
    // Process each section
    const sections: MarkdownSection[] = []
    const entityMap = new Map<string, string>()
@ -202,10 +218,20 @@ export class SmartMarkdownImporter {
      })
    }
    // v4.5.0: Report completion
    const totalEntities = sections.reduce((sum, s) => sum + s.entities.length, 0)
    const totalRelationships = sections.reduce((sum, s) => sum + s.relationships.length, 0)
    opts.onProgress({
      processed: sections.length,
      total: sections.length,
      entities: totalEntities,
      relationships: totalRelationships
    })
    return {
      sectionsProcessed: sections.length,
-      entitiesExtracted: sections.reduce((sum, s) => sum + s.entities.length, 0),
+      entitiesExtracted: totalEntities,
-      relationshipsInferred: sections.reduce((sum, s) => sum + s.relationships.length, 0),
+      relationshipsInferred: totalRelationships,
      sections,
      entityMap,
      processingTime: Date.now() - startTime,
--- a/src/importers/SmartPDFImporter.ts
+++ b/src/importers/SmartPDFImporter.ts
@ -181,7 +181,43 @@ export class SmartPDFImporter {
    }
    // Parse PDF using existing handler
-    const processedData = await this.pdfHandler.process(buffer, options)
+    // v4.5.0: Pass progress hooks to handler for file parsing progress
    const processedData = await this.pdfHandler.process(buffer, {
      ...options,
      totalBytes: buffer.length,
      progressHooks: {
        onBytesProcessed: (bytes) => {
          // Handler reports bytes processed during parsing
          opts.onProgress?.({
            processed: 0,
            total: 0,
            entities: 0,
            relationships: 0,
            phase: `Parsing PDF (${Math.round((bytes / buffer.length) * 100)}%)`
          })
        },
        onCurrentItem: (message) => {
          // Handler reports current processing step (e.g., "Processing page 5 of 23")
          opts.onProgress?.({
            processed: 0,
            total: 0,
            entities: 0,
            relationships: 0,
            phase: message
          })
        },
        onDataExtracted: (count, total) => {
          // Handler reports items extracted (paragraphs + tables)
          opts.onProgress?.({
            processed: 0,
            total: total || count,
            entities: 0,
            relationships: 0,
            phase: `Extracted ${count} items from PDF`
          })
        }
      }
    })
    const data = processedData.data
    const pdfMetadata = processedData.metadata.additionalInfo?.pdfMetadata || {}
--- a/src/importers/SmartYAMLImporter.ts
+++ b/src/importers/SmartYAMLImporter.ts
@ -159,6 +159,13 @@ export class SmartYAMLImporter {
  ): Promise<SmartYAMLResult> {
    const startTime = Date.now()
    // v4.5.0: Report parsing start
    options.onProgress?.({
      processed: 0,
      entities: 0,
      relationships: 0
    })
    // Parse YAML to JavaScript object
    const yamlString = typeof yamlContent === 'string'
      ? yamlContent
@ -171,6 +178,13 @@ export class SmartYAMLImporter {
      throw new Error(`Failed to parse YAML: ${error.message}`)
    }
    // v4.5.0: Report parsing complete
    options.onProgress?.({
      processed: 0,
      entities: 0,
      relationships: 0
    })
    // Process as JSON-like structure
    const result = await this.extractFromData(data, options)
    result.processingTime = Date.now() - startTime
--- a/src/types/brainy.types.ts
+++ b/src/types/brainy.types.ts
@ -385,6 +385,138 @@ export interface BatchResult<T = any> {
  duration: number          // Time taken in ms
 }
 // ============= Import Progress (v4.5.0) =============
 /**
 * Import stage enumeration
 */
 export type ImportStage =
  | 'detecting'   // Detecting file format
  | 'reading'     // Reading file from disk/network
  | 'parsing'     // Parsing file structure (CSV rows, PDF pages, Excel sheets)
  | 'extracting'  // Extracting entities using AI
  | 'indexing'    // Creating graph nodes and relationships
  | 'completing'  // Final cleanup and stats
 /**
 * Overall import status
 */
 export type ImportStatus =
  | 'starting'    // Initializing import
  | 'processing'  // Actively importing
  | 'completing'  // Finalizing
  | 'done'        // Complete
 /**
 * Comprehensive import progress information
 *
 * Provides multi-dimensional progress tracking:
 * - Bytes processed (always deterministic)
 * - Entities extracted and indexed
 * - Stage-specific progress
 * - Time estimates
 * - Performance metrics
 *
 * @since v4.5.0
 */
 export interface ImportProgress {
  // Overall Progress
  overall_progress: number        // 0-100 weighted estimate across all stages
  overall_status: ImportStatus    // High-level status
  // Current Stage
  stage: ImportStage              // What's happening now
  stage_progress: number          // 0-100 within current stage (0 if unknown)
  stage_message: string           // Human-readable: "Extracting entities from PDF..."
  // Bytes (Always Available - most deterministic metric)
  bytes_processed: number         // Bytes read/processed so far
  total_bytes: number             // Total file size (0 if streaming/unknown)
  bytes_percentage: number        // Convenience: bytes_processed / total_bytes * 100
  bytes_per_second?: number       // Processing rate (relevant during parsing)
  // Entities (Available when extraction starts)
  entities_extracted: number      // Entities found during AI extraction
  entities_indexed: number        // Entities added to Brainy graph
  entities_per_second?: number    // Entities/sec (relevant during extraction/indexing)
  estimated_total_entities?: number  // Estimated final count
  estimation_confidence?: number  // 0-1 confidence in estimation
  // Timing
  elapsed_ms: number              // Time since import started
  estimated_remaining_ms?: number // Estimated time remaining
  estimated_total_ms?: number     // Estimated total time
  // Context (helps users understand what's happening)
  current_item?: string           // "Processing page 5 of 23"
  current_file?: string           // "Sheet: Q2 Sales Data"
  file_number?: number            // 3 (when importing multiple files)
  total_files?: number            // 10
  // Performance Metrics (for debugging/optimization)
  metrics?: {
    parsing_rate_mbps?: number              // MB/s during parsing
    extraction_rate_entities_per_sec?: number  // Entities/s during extraction
    indexing_rate_entities_per_sec?: number    // Entities/s during indexing
    memory_usage_mb?: number                // Current memory usage
    peak_memory_mb?: number                 // Peak memory usage
  }
  // Backwards Compatibility (for legacy code)
  current: number  // Alias for entities_indexed
  total: number    // Alias for estimated_total_entities or 0
 }
 /**
 * Import progress callback - backwards compatible
 *
 * Supports both legacy (current, total) and new (ImportProgress object) signatures
 */
 export type ImportProgressCallback =
  | ((progress: ImportProgress) => void)
  | ((current: number, total: number) => void)
 /**
 * Stage weight configuration for overall progress calculation
 *
 * These weights reflect the typical time distribution across stages.
 * Extraction is typically the slowest stage (60% of time).
 */
 export interface StageWeights {
  detecting: number    // Default: 0.01 (1%)
  reading: number      // Default: 0.05 (5%)
  parsing: number      // Default: 0.10 (10%)
  extracting: number   // Default: 0.60 (60% - slowest!)
  indexing: number     // Default: 0.20 (20%)
  completing: number   // Default: 0.04 (4%)
 }
 /**
 * Import result statistics
 */
 export interface ImportStats {
  graphNodesCreated: number     // Entities added to graph
  graphEdgesCreated: number     // Relationships created
  vfsFilesCreated: number       // VFS files created
  duration: number              // Total time in ms
  bytesProcessed: number        // Total bytes read
  averageRate: number           // Average entities/sec
  peakMemoryMB?: number         // Peak memory usage
 }
 /**
 * Import operation result
 */
 export interface ImportResult {
  success: boolean
  stats: ImportStats
  errors?: Array<{
    stage: ImportStage
    message: string
    error?: any
  }>
 }
 // ============= Advanced Operations =============
 /**
--- a/src/utils/import-progress-tracker.ts
+++ b/src/utils/import-progress-tracker.ts
@ -0,0 +1,541 @@
 /**
 * Import Progress Tracker (v4.5.0)
 *
 * Comprehensive progress tracking for imports with:
 * - Multi-dimensional progress (bytes, entities, stages, timing)
 * - Smart estimation (entity count, time remaining)
 * - Stage-specific metrics (bytes/sec vs entities/sec)
 * - Throttled callbacks (avoid spam)
 * - Weighted overall progress
 *
 * @since v4.5.0
 */
 import {
  ImportProgress,
  ImportStage,
  ImportStatus,
  StageWeights,
  ImportProgressCallback
 } from '../types/brainy.types.js'
 /**
 * Default stage weights (reflect typical time distribution)
 */
 const DEFAULT_STAGE_WEIGHTS: StageWeights = {
  detecting: 0.01,   // 1% - very fast
  reading: 0.05,     // 5% - reading file
  parsing: 0.10,     // 10% - parsing structure
  extracting: 0.60,  // 60% - AI extraction (slowest!)
  indexing: 0.20,    // 20% - creating graph
  completing: 0.04   // 4% - cleanup
 }
 /**
 * Stage ordering for progress calculation
 */
 const STAGE_ORDER: ImportStage[] = [
  'detecting',
  'reading',
  'parsing',
  'extracting',
  'indexing',
  'completing'
 ]
 /**
 * Progress tracker for imports
 */
 export class ImportProgressTracker {
  // Configuration
  private readonly stageWeights: StageWeights
  private readonly throttleMs: number
  private readonly callback?: ImportProgressCallback
  // Tracking state
  private startTime: number
  private lastEmitTime: number = 0
  private currentStage: ImportStage = 'detecting'
  private completedStages: Set<ImportStage> = new Set()
  // Metrics
  private totalBytes: number = 0
  private bytesProcessed: number = 0
  private entitiesExtracted: number = 0
  private entitiesIndexed: number = 0
  private parseStartTime?: number
  private extractStartTime?: number
  private indexStartTime?: number
  // Estimation
  private lastBytesCheckpoint: number = 0
  private lastBytesCheckpointTime: number = 0
  private lastEntitiesCheckpoint: number = 0
  private lastEntitiesCheckpointTime: number = 0
  // Context
  private currentItem?: string
  private currentFile?: string
  private fileNumber?: number
  private totalFiles?: number
  // Memory tracking
  private peakMemoryMB: number = 0
  constructor(options: {
    totalBytes?: number
    stageWeights?: Partial<StageWeights>
    throttleMs?: number
    callback?: ImportProgressCallback
  } = {}) {
    this.stageWeights = { ...DEFAULT_STAGE_WEIGHTS, ...options.stageWeights }
    this.throttleMs = options.throttleMs ?? 100  // 100ms default
    this.callback = options.callback
    this.totalBytes = options.totalBytes ?? 0
    this.startTime = Date.now()
    this.lastBytesCheckpointTime = this.startTime
    this.lastEntitiesCheckpointTime = this.startTime
  }
  /**
   * Set total file size (if known later)
   */
  setTotalBytes(bytes: number): void {
    this.totalBytes = bytes
  }
  /**
   * Update current stage
   */
  setStage(stage: ImportStage, message?: string): void {
    // Mark previous stage as complete
    if (this.currentStage !== stage) {
      this.completedStages.add(this.currentStage)
    }
    this.currentStage = stage
    if (message) {
      this.setStageMessage(message)
    }
    // Track stage start times
    const now = Date.now()
    switch (stage) {
      case 'parsing':
        this.parseStartTime = now
        break
      case 'extracting':
        this.extractStartTime = now
        break
      case 'indexing':
        this.indexStartTime = now
        break
    }
    // Force emit on stage change
    this.emit(true)
  }
  /**
   * Update bytes processed
   */
  updateBytes(bytes: number): void {
    this.bytesProcessed = bytes
    this.emit()
  }
  /**
   * Increment bytes processed
   */
  addBytes(bytes: number): void {
    this.bytesProcessed += bytes
    this.emit()
  }
  /**
   * Update entities extracted
   */
  updateEntitiesExtracted(count: number): void {
    this.entitiesExtracted = count
    this.emit()
  }
  /**
   * Increment entities extracted
   */
  addEntitiesExtracted(count: number): void {
    this.entitiesExtracted += count
    this.emit()
  }
  /**
   * Update entities indexed
   */
  updateEntitiesIndexed(count: number): void {
    this.entitiesIndexed = count
    this.emit()
  }
  /**
   * Increment entities indexed
   */
  addEntitiesIndexed(count: number): void {
    this.entitiesIndexed += count
    this.emit()
  }
  /**
   * Set context information
   */
  setContext(context: {
    currentItem?: string
    currentFile?: string
    fileNumber?: number
    totalFiles?: number
  }): void {
    if (context.currentItem !== undefined) this.currentItem = context.currentItem
    if (context.currentFile !== undefined) this.currentFile = context.currentFile
    if (context.fileNumber !== undefined) this.fileNumber = context.fileNumber
    if (context.totalFiles !== undefined) this.totalFiles = context.totalFiles
    this.emit()
  }
  /**
   * Set stage message
   */
  private setStageMessage(message: string): void {
    this.currentItem = message
  }
  /**
   * Calculate stage progress (0-100 within current stage)
   */
  private calculateStageProgress(): number {
    switch (this.currentStage) {
      case 'detecting':
      case 'completing':
        // These are quick, assume 100% once started
        return 100
      case 'reading':
      case 'parsing':
        // Use bytes as proxy for progress
        if (this.totalBytes === 0) return 0
        return Math.min(100, (this.bytesProcessed / this.totalBytes) * 100)
      case 'extracting':
        // Extraction progress is hard to estimate (AI is unpredictable)
        // We can't reliably say % complete, so return 0
        return 0
      case 'indexing':
        // If we have estimated total entities, use that
        if (this.entitiesExtracted > 0) {
          return Math.min(100, (this.entitiesIndexed / this.entitiesExtracted) * 100)
        }
        return 0
      default:
        return 0
    }
  }
  /**
   * Calculate overall progress (0-100 weighted across all stages)
   */
  private calculateOverallProgress(): number {
    // Calculate progress of completed stages
    let completedWeight = 0
    for (const stage of this.completedStages) {
      completedWeight += this.stageWeights[stage]
    }
    // Calculate progress of current stage
    const stageProgress = this.calculateStageProgress()
    const currentStageContribution = this.stageWeights[this.currentStage] * (stageProgress / 100)
    // Overall = completed stages + current stage contribution
    const overall = (completedWeight + currentStageContribution) * 100
    return Math.min(100, Math.max(0, overall))
  }
  /**
   * Calculate bytes per second
   */
  private calculateBytesPerSecond(): number | undefined {
    const now = Date.now()
    const elapsed = now - this.lastBytesCheckpointTime
    // Need at least 1 second of data
    if (elapsed < 1000) return undefined
    const bytesDelta = this.bytesProcessed - this.lastBytesCheckpoint
    const bytesPerSec = (bytesDelta / elapsed) * 1000
    // Update checkpoint
    this.lastBytesCheckpoint = this.bytesProcessed
    this.lastBytesCheckpointTime = now
    return bytesPerSec > 0 ? bytesPerSec : undefined
  }
  /**
   * Calculate entities per second
   */
  private calculateEntitiesPerSecond(): number | undefined {
    const now = Date.now()
    const elapsed = now - this.lastEntitiesCheckpointTime
    // Need at least 1 second of data
    if (elapsed < 1000) return undefined
    // Use appropriate counter based on stage
    const currentCount = this.currentStage === 'indexing'
      ? this.entitiesIndexed
      : this.entitiesExtracted
    const entitiesDelta = currentCount - this.lastEntitiesCheckpoint
    const entitiesPerSec = (entitiesDelta / elapsed) * 1000
    // Update checkpoint
    this.lastEntitiesCheckpoint = currentCount
    this.lastEntitiesCheckpointTime = now
    return entitiesPerSec > 0 ? entitiesPerSec : undefined
  }
  /**
   * Estimate total entities
   */
  private estimateTotalEntities(): { count: number, confidence: number } | undefined {
    // Only estimate if we've processed some bytes and extracted some entities
    if (this.bytesProcessed === 0 || this.entitiesExtracted === 0 || this.totalBytes === 0) {
      return undefined
    }
    // Estimate based on entities per byte
    const bytesPercentage = this.bytesProcessed / this.totalBytes
    const estimatedTotal = Math.ceil(this.entitiesExtracted / bytesPercentage)
    // Confidence increases with more data
    const confidence = Math.min(0.95, bytesPercentage)
    return { count: estimatedTotal, confidence }
  }
  /**
   * Estimate remaining time
   */
  private estimateRemainingTime(): number | undefined {
    const now = Date.now()
    const elapsed = now - this.startTime
    // Need at least 5 seconds of data for reasonable estimate
    if (elapsed < 5000) return undefined
    const overallProgress = this.calculateOverallProgress()
    if (overallProgress === 0) return undefined
    // Estimate total time based on current progress
    const estimatedTotalMs = (elapsed / overallProgress) * 100
    const remainingMs = estimatedTotalMs - elapsed
    return remainingMs > 0 ? remainingMs : undefined
  }
  /**
   * Get current memory usage
   */
  private getCurrentMemoryMB(): number | undefined {
    if (typeof process === 'undefined' || !process.memoryUsage) return undefined
    const usage = process.memoryUsage()
    const currentMB = usage.heapUsed / 1024 / 1024
    // Track peak
    this.peakMemoryMB = Math.max(this.peakMemoryMB, currentMB)
    return currentMB
  }
  /**
   * Build complete progress object
   */
  private buildProgress(): ImportProgress {
    const now = Date.now()
    const elapsed = now - this.startTime
    const stageProgress = this.calculateStageProgress()
    const overallProgress = this.calculateOverallProgress()
    const bytesPerSec = this.calculateBytesPerSecond()
    const entitiesPerSec = this.calculateEntitiesPerSecond()
    const entityEstimate = this.estimateTotalEntities()
    const remainingMs = this.estimateRemainingTime()
    const currentMemoryMB = this.getCurrentMemoryMB()
    // Determine overall status
    let overallStatus: ImportStatus
    if (overallProgress === 0) {
      overallStatus = 'starting'
    } else if (overallProgress === 100) {
      overallStatus = 'done'
    } else if (this.currentStage === 'completing') {
      overallStatus = 'completing'
    } else {
      overallStatus = 'processing'
    }
    // Stage message
    let stageMessage: string
    if (this.currentItem) {
      stageMessage = this.currentItem
    } else {
      // Default messages
      switch (this.currentStage) {
        case 'detecting':
          stageMessage = 'Detecting file format...'
          break
        case 'reading':
          stageMessage = 'Reading file...'
          break
        case 'parsing':
          stageMessage = 'Parsing file structure...'
          break
        case 'extracting':
          stageMessage = 'Extracting entities using AI...'
          break
        case 'indexing':
          stageMessage = 'Creating graph nodes...'
          break
        case 'completing':
          stageMessage = 'Finalizing import...'
          break
        default:
          stageMessage = 'Processing...'
      }
    }
    // Calculate bytes percentage
    const bytesPercentage = this.totalBytes > 0
      ? (this.bytesProcessed / this.totalBytes) * 100
      : 0
    // Build metrics object
    const metrics: ImportProgress['metrics'] = {
      parsing_rate_mbps: this.currentStage === 'parsing' && bytesPerSec
        ? bytesPerSec / 1_000_000
        : undefined,
      extraction_rate_entities_per_sec: this.currentStage === 'extracting'
        ? entitiesPerSec
        : undefined,
      indexing_rate_entities_per_sec: this.currentStage === 'indexing'
        ? entitiesPerSec
        : undefined,
      memory_usage_mb: currentMemoryMB,
      peak_memory_mb: this.peakMemoryMB > 0 ? this.peakMemoryMB : undefined
    }
    const progress: ImportProgress = {
      // Overall
      overall_progress: overallProgress,
      overall_status: overallStatus,
      // Stage
      stage: this.currentStage,
      stage_progress: stageProgress,
      stage_message: stageMessage,
      // Bytes
      bytes_processed: this.bytesProcessed,
      total_bytes: this.totalBytes,
      bytes_percentage: bytesPercentage,
      bytes_per_second: bytesPerSec,
      // Entities
      entities_extracted: this.entitiesExtracted,
      entities_indexed: this.entitiesIndexed,
      entities_per_second: entitiesPerSec,
      estimated_total_entities: entityEstimate?.count,
      estimation_confidence: entityEstimate?.confidence,
      // Timing
      elapsed_ms: elapsed,
      estimated_remaining_ms: remainingMs,
      estimated_total_ms: remainingMs ? elapsed + remainingMs : undefined,
      // Context
      current_item: this.currentItem,
      current_file: this.currentFile,
      file_number: this.fileNumber,
      total_files: this.totalFiles,
      // Metrics
      metrics,
      // Backwards compatibility
      current: this.entitiesIndexed,
      total: entityEstimate?.count ?? 0
    }
    return progress
  }
  /**
   * Emit progress (throttled)
   */
  private emit(force: boolean = false): void {
    if (!this.callback) return
    const now = Date.now()
    const timeSinceLastEmit = now - this.lastEmitTime
    // Throttle unless forced
    if (!force && timeSinceLastEmit < this.throttleMs) {
      return
    }
    const progress = this.buildProgress()
    // Handle both callback types (legacy and new)
    if (this.callback.length === 2) {
      // Legacy callback: (current, total) => void
      ;(this.callback as (current: number, total: number) => void)(
        progress.current,
        progress.total
      )
    } else {
      // New callback: (progress: ImportProgress) => void
      ;(this.callback as (progress: ImportProgress) => void)(progress)
    }
    this.lastEmitTime = now
  }
  /**
   * Force emit (for completion or critical updates)
   */
  forceEmit(): void {
    this.emit(true)
  }
  /**
   * Get current progress (without emitting)
   */
  getProgress(): ImportProgress {
    return this.buildProgress()
  }
  /**
   * Mark import as complete
   */
  complete(): ImportProgress {
    this.currentStage = 'completing'
    this.completedStages.add('completing')
    const progress = this.buildProgress()
    this.forceEmit()
    return progress
  }
 }