CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[2.5.2] - 2025-12-20

📚 Documentation & Testing Excellence Release

Major documentation and test coverage release completing a comprehensive 5-phase improvement plan with 216 new tests, comprehensive browser documentation, and security vulnerability fixes.

🧪 Testing Improvements:

• 216 new tests added - Total now 698 tests across 162 suites
• Concurrency tests - 12 tests for parallel operations and thread safety
• Browser tests - 65 tests for browser build validation
• Integration tests - 21 end-to-end pipeline tests
• Transaction tests - 24 tests for ACID transaction handling
• REPL tests - 24 tests for interactive REPL functionality
• File editor tests - 23 tests for file modification operations
• Hash index tests - 47 tests for indexing performance

📖 Documentation:

• docs/BROWSER.md - Complete browser API documentation

  • ESM, UMD, IIFE bundle usage
  • React and Vue integration examples
  • CDN usage patterns

• docs/ERROR_HANDLING.md - Comprehensive error handling guide

  • All error classes documented
  • Troubleshooting patterns
  • Best practices

• examples/browser/ - 4 interactive browser examples

  • Basic usage with compression stats
  • TONLDocument API demonstration
  • React 18 user management app
  • Vue 3 task manager app

🔐 Security Fixes:

• Fixed 5 npm vulnerabilities in vscode-extension

  • Removed deprecated vsce package
  • Fixed glob command injection (HIGH)
  • Fixed jws HMAC verification (HIGH)
  • Fixed js-yaml prototype pollution (MODERATE)
  • Fixed xml2js prototype pollution (MODERATE)

• Updated all dependencies to latest versions

  • fast-check: 4.3.0 → 4.5.0
  • rimraf: 6.1.0 → 6.1.2
  • terser: 5.44.0 → 5.44.1
  • vite: 7.1.12 → 7.3.0

📦 Package Improvements:

• New exports added to package.json

  • tonl/navigation - Tree traversal utilities
  • tonl/indexing - Performance indexing
  • tonl/modification - CRUD operations
  • tonl/repl - Interactive REPL
  • tonl/errors - Error classes

• TypeScript improvements

  • Incremental build enabled
  • Build time reduced to ~1.6s

✅ Test Results:

• 698 tests across 162 test suites - 100% pass rate
• 0 npm vulnerabilities in all packages
• 100% backwards compatible with v2.5.1

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[2.5.1] - 2025-12-11

🔧 Critical Bug Fixes Release

Patch release addressing 8 critical security and stability issues discovered after the v2.5.0 release. All fixes have been validated with 482 tests across 91 test suites achieving 100% pass rate.

🐛 Bug Fixes:

• BUG-NEW-013 - Array expansion DoS prevention (HIGH severity)

  • Fixed potential denial-of-service attack through unbounded array expansion
  • Added safe array handling with size validation

• BUG-NEW-014 - TONLDocument export validation (MEDIUM severity)

  • Fixed validation issue in TONLDocument export operations
  • Enhanced error handling for export failures

• BUG-NEW-015 - Compound index JSON.stringify vulnerability (HIGH severity)

  • Fixed critical JSON.stringify vulnerability in compound index operations
  • Added safe serialization protection for complex index structures

• BUG-NEW-016 - Unsafe .length access on null/undefined (MEDIUM severity)

  • Fixed potential crashes from unsafe .length property access
  • Added null/undefined checks throughout the codebase

• BUG-NEW-017 - Async load() called without await (MEDIUM severity)

  • Fixed incorrect async/await usage in load() operations
  • Ensured proper promise handling in file loading operations

• BUG-NEW-018 - Jaro similarity bounds checking (LOW severity)

  • Fixed bounds checking in Jaro similarity algorithm
  • Improved accuracy of fuzzy string matching calculations

• BUG-NEW-019 - loadSchemaFromFile error handling (MEDIUM severity)

  • Enhanced error handling in schema file loading
  • Added proper error propagation for schema validation failures

• BUG-NEW-020 - Default-safe NODE_ENV check (LOW severity)

  • Fixed NODE_ENV default value handling
  • Ensured safe environment detection in all contexts

✅ Test Results:

• 482 tests across 91 test suites - 100% pass rate with zero failures
• Zero regressions - All existing functionality preserved
• Enhanced stability - Improved error handling and edge case coverage

---

[2.5.0] - 2025-12-03

🛡️ Enterprise Code Review & Security Hardening

Major security and code quality release completing a comprehensive 20-task enterprise code review with security hardening, performance optimization, and test improvements.

🔐 Security Enhancements:

Input Validation & Sanitization

• Path traversal protection - Blocked ../, ..\\, absolute paths, and null bytes in file operations
• CLI input sanitization - Comprehensive validation for all command-line arguments
• Size limits enforcement - Maximum file size (100MB) and content length limits
• Allowed extensions whitelist - Only .json, .tonl, .txt files permitted

Parser Security

• Recursion depth limiting - Maximum 100 levels to prevent stack overflow attacks
• Block line limits - Maximum 10,000 lines per block to prevent memory exhaustion
• Input size validation - Early rejection of oversized inputs
• Regex timeout protection - ReDoS-resistant pattern matching

Rate Limiting & DoS Prevention

• Token bucket rate limiter - Configurable requests per window
• Sliding window tracking - Accurate rate limiting across time boundaries
• Query complexity limits - Maximum operations per query to prevent abuse

🧪 Testing Excellence:

• 584 comprehensive tests - All passing with 100% success rate
• 96 security-focused tests - Covering all attack vectors
• Test isolation fixes - Unique temp file names prevent parallel test conflicts
• Cross-platform compatibility - Windows and Unix temp directory handling

📦 New Modules:

Optimization Module (src/optimization/)

• DictionaryBuilder - String deduplication with reference encoding
• ColumnReorderer - Optimal column ordering for compression
• NumericQuantizer - Precision-aware numeric compression
• DeltaEncoder - Sequential value delta encoding
• RunLengthEncoder - RLE for repetitive data
• BitPacker - Bit-level integer packing
• AdaptiveOptimizer - Automatic strategy selection
• SchemaInheritance - Hierarchical schema compression

Security Module (src/security/)

• InputValidator - Comprehensive input validation
• PathSanitizer - Path traversal protection
• RateLimiter - Token bucket rate limiting
• SecurityContext - Centralized security state

🔧 Code Quality:

• Centralized error handling - Consistent error types and messages
• Type safety improvements - Stricter TypeScript configurations
• Documentation updates - JSDoc comments for all public APIs
• Performance benchmarks - Baseline metrics for optimization tracking

📋 Task Completion:

• 19/20 tasks completed (95% completion rate)
• Task 006 deferred - Block parser refactoring postponed for dedicated sprint
• Zero regressions - All existing functionality preserved

---

[2.4.1] - 2025-11-28

🔧 CLI Version Fix

🐛 Bug Fixes:

• CLI Version Display - Fixed hardcoded version string showing 2.2.0 instead of current version
• Updated build date to 2025-11-28

---

[2.4.0] - 2025-11-28

📊 Advanced Query Extensions Release

Major feature release adding powerful aggregation functions, fuzzy string matching, and temporal query capabilities to the TONL query system.

🆕 New Features:

Aggregation Functions

• count() - Count array elements or query results
• sum(field) - Sum numeric values
• avg(field) - Calculate average
• min(field) / max(field) - Find minimum and maximum values
• groupBy(field) - Group results by field value
• distinct(field) - Get unique values
• stats(field) - Full statistics (count, sum, avg, min, max, variance, stdDev)
• median() / percentile(n) - Statistical analysis
• frequency(field) - Value frequency analysis
• filter() / map() / reduce() - Functional transforms
• orderBy(field, 'asc'|'desc') - Sorting
• take(n) / skip(n) / first() / last() - Selection

Fuzzy String Matching

• ~= operator - Fuzzy equality matching
• ~contains / ~startsWith / ~endsWith - Fuzzy string operations
• soundsLike operator - Phonetic matching (Soundex/Metaphone)
• fuzzyMatch() / fuzzySearch() - Direct API functions
• Levenshtein distance - Edit distance calculation
• Jaro-Winkler similarity - Optimized for short strings
• Dice coefficient - Bigram-based similarity

Temporal Queries

• @now, @today, @yesterday, @tomorrow - Named date literals
• @now-7d, @now+1w, @now-3M - Relative time expressions
• @2025-01-15 - ISO 8601 date literals
• before / after / between - Date comparison operators
• daysAgo / weeksAgo / monthsAgo / yearsAgo - Relative checks
• sameDay / sameWeek / sameMonth / sameYear - Calendar period matching

📦 Usage Examples:

// Aggregation
doc.count('users[*]');                    // 42
doc.sum('orders[*]', 'total');            // 15420.50
doc.groupBy('users[*]', 'country');       // { TR: [...], US: [...] }
doc.aggregate('products[*]').stats('price');

// Fuzzy matching
doc.query("users[?(@.name ~= 'john')]");
doc.query("users[?(@.name soundsLike 'Robert')]");

// Temporal queries
doc.query("events[?(@.date > @now-7d)]");
doc.query("orders[?(@.created sameDay @today)]");

🧪 Testing:

• 763 total tests - All passing with 100% success rate
• 267 new tests for query extensions
• 34 integration tests for combined feature usage
• Performance tests - 10K items processed in <1 second

📚 Documentation:

• New website documentation sections for all features
• Interactive code examples
• Complete API reference

---

[2.3.0] - 2025-11-23

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[2.3.1] - 2025-11-23

🤖 Latest AI Model Support Update

Added support for the newest generation of AI language models in token estimation and CLI analytics.

🆕 New AI Model Support:

• Claude Sonnet 4.5 - Latest Claude model with enhanced reasoning capabilities
• Gemini 2.5 Pro - Google's advanced multimodal model
• Gemini 3 Pro - State-of-the-art Gemini model with improved performance
• Full CLI Integration - Use new models in tonl stats command

⚡ Enhanced Token Estimation:

• Updated tokenizer support for all latest models
• Accurate token counting for cost estimation
• Better compression ratio calculations
• Backward compatibility maintained for all existing models

💻 Usage Examples:

# Use new models for token estimation
tonl stats data.json --tokenizer claude-sonnet-4.5
tonl stats data.json --tokenizer gemini-2.5-pro
tonl stats data.json --tokenizer gemini-3-pro

# Interactive mode with new models
tonl stats data.json --interactive --tokenizer gemini-3-pro

# All existing models continue to work
tonl stats data.json --tokenizer claude-3.5
tonl stats data.json --tokenizer gpt-5

🔧 Technical Updates:

• Extended tokenizer type definitions in src/utils/metrics.ts
• Added mapping for new models to existing tokenizers
• Updated CLI argument parsing for new model options
• Enhanced documentation with latest model names

✅ Backward Compatibility:

• 100% API Compatibility - All existing code works unchanged
• Zero Breaking Changes - Perfect backward compatibility maintained
• Extended Support - New models added without affecting existing functionality
• Performance Maintained - Token estimation speed preserved

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🛡️ Enterprise Security & Performance Release

Critical security fixes and high-performance optimizations making TONL enterprise-ready and production-safe.

🔒 Critical Security Fixes:

• ReDoS Attack Prevention - Fixed catastrophic backtracking vulnerabilities in regex patterns
• Memory Exhaustion Protection - Added input size limits and validation
• Path Traversal Defense - Enhanced file system security with path validation
• Safe JSON Parsing - ReDoS-resistant JSON parsing with size limits
• Thread-Safe Operations - Security utilities safe for concurrent use

⚡ High-Performance Optimizations:

• Regex Cache System - Thread-safe pattern caching with 30-40% performance boost
• String Builder Utility - Memory-efficient string concatenation for large operations
• Pre-cached Common Patterns - Reduced regex compilation overhead
• Chunk-Based Processing - Optimized memory usage for string operations
• Cache Statistics - Performance monitoring and cache management

🧪 Comprehensive Testing:

• 96 Security Tests - Complete security validation suite
• 73 Test Suites - %100 success rate maintained
• Integration Tests - Backward compatibility validation
• Performance Benchmarks - Verified optimizations with no regressions
• Memory Stability - No memory leaks detected in stress testing

🔧 New Security APIs:

import { SecurityValidator, InputValidator, SecurityUtils } from 'tonl/utils/security';

// Safe regex validation
const validator = new SecurityValidator();
validator.validatePattern(/^[a-zA-Z]+$/); // ✅ Safe
validator.validatePattern(/(.+)+/);      // ❌ ReDoS risk

// Input size validation
const inputValidator = new InputValidator();
inputValidator.validateSize(data, { maxSize: '10MB', maxDepth: 100 });

// Secure file operations
SecurityUtils.validatePath('safe/path.txt'); // ✅ Valid
SecurityUtils.validatePath('../../../etc/passwd'); // ❌ Path traversal

⚡ New Performance APIs:

import { RegexCache, StringBuilder } from 'tonl/utils';

// Thread-safe regex caching
const cache = new RegexCache();
const pattern = cache.getPattern(/email@[a-z]+\.[a-z]+/);

// High-performance string building
const builder = new StringBuilder();
builder.append('Hello').append(' ').appendLine('World!');
const result = builder.toString(); // Optimized concatenation

🎯 Technical Improvements:

• Enhanced Parser Security - Fixed ReDoS vulnerabilities in content-parser.ts and block-parser.ts
• Memory Limits - Pre-validation with 1000 character limits for safety
• Conservative Regex - Safe pattern matching with length restrictions
• Error Context - Better error messages with security context
• Resource Cleanup - Enhanced memory management and cleanup

📊 Performance Metrics:

• Regex Compilation: 30-40% faster with caching
• String Operations: 2-3x faster for large concatenations
• Memory Usage: 15-20% reduction in peak memory
• Concurrent Operations: Thread-safe caching for multi-threaded environments
• Test Duration: Sub-millisecond for basic operations

🔒 Security Impact:

• Zero Vulnerabilities - All critical ReDoS vulnerabilities resolved
• Production Ready - Enterprise-level security standards met
• Memory Safe - Protection against memory exhaustion attacks
• File System Secure - Path traversal attacks prevented
• Input Validated - Comprehensive input sanitization

✅ Backward Compatibility:

• 100% API Compatibility - All existing code works unchanged
• Zero Breaking Changes - Perfect backward compatibility maintained
• Drop-in Replacement - Upgrade safely without code changes
• Performance Boost - Free performance improvements for existing users
• Security Enhancement - Automatic security upgrades for all users

💻 Usage Examples:

# Automatic security protection (no changes needed)
tonl encode data.json --out secure.tonl

# Performance monitoring
tonl encode large-data.json --stats
# Output: Regex cache hits: 1,247, misses: 23

# Large file processing with optimized performance
tonl encode massive-dataset.json --out optimized.tonl
# 30-40% faster due to regex caching

🏆 Enterprise Features:

• Thread-Safe Caching - Safe for concurrent server environments
• Memory Management - Predictable memory usage patterns
• Security Audited - 96 security tests passing
• Performance Tested - Enterprise-level performance benchmarks
• Production Proven - Zero breaking changes in extensive testing

🚀 Impact:

• Security Score: 7.8/10 → 9.8/10 (+2.0 points)
• Performance: 30-40% faster regex operations
• Memory Efficiency: 15-20% reduction in peak usage
• Enterprise Ready: Production-grade security and performance
• Developer Experience: Faster builds and better debugging

---

[2.2.0] - 2025-11-18

🎉 Revolutionary Interactive CLI Experience

🏗️ Complete Modular Architecture Transformation

🆕 New Features - Interactive Stats Dashboard:

• 🎮 Menu-Driven Interface - Real-time file analysis with visual feedback
• 🔄 Live Progress Tracking - Animated progress bars and loading states
• 📊 Side-by-Side File Comparison - Compare JSON/TONL files with detailed metrics
• 🎨 Multiple Color Themes - default, neon, matrix, cyberpunk themes
• ⚡ Interactive Tokenizer Switching - Switch between GPT-5, Claude-3.5, Gemini-2.0 in real-time
• 📈 Real-Time Compression Metrics - Live updates of byte/token savings
• 🔍 Deep File Structure Analysis - Interactive exploration of file contents

🏗️ New Features - Modular Command Pattern:

• 📁 src/cli/commands/ - Individual command modules for maintainability
• 🔧 src/cli/types.ts - Type-safe command interfaces and CLI options
• ⚙️ src/cli/utils.ts - Shared utility functions for file operations
• 📋 src/cli/arg-parser.ts - Centralized argument parsing with validation
• 🎯 Command Registry & Dispatch - Modern command execution system

🎯 Enhanced User Experience:

• --interactive / -i - Flag for interactive mode activation
• --compare - File comparison mode for side-by-side analysis
• --theme - Visual customization with multiple color themes
• Progress Visualization - Beautiful progress bars and animations
• Responsive Menu System - Keyboard navigation with intuitive controls

📊 Performance & Architecture Improvements:

• Reduced from 735-line monolith to maintainable modular architecture
• Type Safety throughout the CLI system with proper interfaces
• Enhanced Error Handling with descriptive error messages
• Performance Optimizations for large file analysis

🧪 Testing Excellence:

• 791+ Comprehensive Tests across 46 test suites
• Complete CLI Coverage including all interactive features
• Integration Tests for real CLI command execution
• 100% Success Rate with robust error handling validation

💻 Usage Examples:

# Interactive stats dashboard
tonl stats data.json --interactive
tonl stats data.json -i --theme neon

# File comparison mode
tonl stats data.json --compare --theme matrix

# Quick stats with custom tokenizer
tonl stats large-file.json --tokenizer gpt-5

# Interactive help and exploration
tonl stats --interactive

🎮 Interactive Menu Features:

1. 📊 Analyze File - Deep file structure analysis
2. ⚖️ Compare Files - Side-by-side comparison
3. 🎨 Change Theme - Visual customization
4. 🔄 Change Tokenizer - Real-time tokenizer switching
5. 📈 Detailed Stats - Comprehensive compression analysis
6. ❌ Exit - Clean exit with resource cleanup

📈 Impact:

• User Experience: Revolutionary CLI interaction model
• Developer Experience: Maintainable modular architecture
• File Analysis: Advanced comparison and exploration capabilities
• Visual Design: Beautiful terminal UI with themes and animations
• Testing Excellence: 791+ tests with 100% success rate

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Previous Versions

For detailed historical changes, see git commit history