Update specs

README.md

@@ -164,6 +164,15 @@ end
 * ```after_session_created```
 * ```after_data_changed```
 
+## Documentation
+
+For detailed documentation on the project, including update guides, fixes, and test infrastructure, see the [docs/](docs/) directory.
+
+Key documents:
+- [open62541 v1.4.14 Update](docs/completed/open62541-update/OPEN62541_V1.4.14_UPDATE_COMPLETE.md) - Library update summary
+- [Test Infrastructure](docs/completed/tests/TEST_INFRASTRUCTURE_SETUP.md) - Testing setup and usage
+- [Documentation Index](docs/README.md) - Complete documentation index
+
 ## Contribute
 
 ### Set up

build.sh

@@ -0,0 +1,7 @@
+#!/bin/sh -e
+
+cd `dirname $0`
+./setup.sh
+
+bundle exec rake
+echo 'Success'

docs/README.md

@@ -0,0 +1,142 @@
+# Documentation Index
+
+This directory contains all project documentation organized by category and status.
+
+---
+
+## 📁 Directory Structure
+
+```
+docs/
+├── completed/          # Completed projects and fixes
+│   ├── open62541-update/  # open62541 library update documentation
+│   ├── fixes/             # Bug fixes and improvements
+│   └── tests/             # Test infrastructure and reports
+├── planning/           # Future plans and investigations
+└── reference/          # Reference materials (currently empty)
+```
+
+---
+
+## ✅ Completed Projects
+
+### 🔄 open62541 Library Update (v0.3.0 → v1.4.14)
+
+**Location:** `completed/open62541-update/`
+
+Major update bringing 6 years of improvements, security patches, and new features.
+
+| File | Description |
+|------|-------------|
+| **OPEN62541_V1.4.14_UPDATE_COMPLETE.md** | ✅ Completion report - All 51 tests passing |
+| **OPEN62541_UPDATE_ANALYSIS.md** | Detailed analysis of changes and migration strategy |
+| **OPEN62541_VERSION_CHANGES.md** | Comprehensive changelog and API changes |
+| **UPDATE_CHECKLIST.md** | Step-by-step checklist (archived - completed) |
+
+**Status:** ✅ Complete locally, awaiting deployment
+- ⏳ Test on GitHub Actions (all Ruby versions 2.4-4.0)
+- ⏳ Merge to main branch
+- ⏳ Release new gem version
+
+---
+
+### 🔧 Fixes and Improvements
+
+**Location:** `completed/fixes/`
+
+| File | Description | Status |
+|------|-------------|--------|
+| **UTF8_ENCODING_FIX.md** | Fixed string encoding to explicitly use UTF-8 | ✅ Complete |
+| **COMPILER_WARNINGS_FIX_GUIDE.md** | Fixed all 7 compiler warnings in opcua_client.c | ✅ Complete |
+| **GITHUB_ACTIONS_FIX.md** | Fixed CI failures for Ruby 2.4-2.6 (debugger compatibility) | ✅ Complete |
+| **C_CONVERSION.md** | Converted test server from C++ to pure C | ✅ Complete |
+| **TEST_SERVER_UPDATE.md** | Updated test server to open62541 v1.4.14 API | ✅ Complete |
+
+---
+
+### 🧪 Test Infrastructure
+
+**Location:** `completed/tests/`
+
+| File | Description | Status |
+|------|-------------|--------|
+| **TEST_INFRASTRUCTURE_SETUP.md** | Comprehensive test infrastructure (11 tests) | ✅ Phase 1 Complete |
+| **STABILITY_TEST_REPORT.md** | 50 consecutive runs - 100% success rate | ✅ Complete |
+
+---
+
+## 📋 Planning & Future Work
+
+**Location:** `planning/`
+
+| File | Description | Priority |
+|------|-------------|----------|
+| **mock-server-testing-approach.md** | Investigation of embedded mock server vs external server | Medium |
+
+**Recommendations:**
+- Embedded mock server (8-12 hours effort) - Best balance of speed and realism
+- Hybrid approach: Unit tests with mock server + Integration tests with external server
+
+---
+
+## 📊 Project Metrics
+
+### Test Coverage
+- **Total Tests:** 51 examples
+- **Success Rate:** 100% (0 failures)
+- **Average Runtime:** ~2.45 seconds
+
+### Code Quality
+- **Compiler Warnings:** 0 (all fixed)
+- **Ruby Versions Supported:** 2.4, 2.5, 2.6, 2.7, 3.0, 3.1, 4.0
+- **Platforms:** Linux, Windows (via GitHub Actions)
+
+### Library Updates
+- **open62541:** v0.3.0 (2018) → v1.4.14 (Oct 2024)
+- **Code Size Increase:** 5.5x (59,565 → 324,804 lines)
+- **Security:** 6 years of patches and improvements
+
+---
+
+## 🎯 Next Steps
+
+### Immediate (High Priority)
+1. Run GitHub Actions to verify all Ruby versions pass
+2. Merge open62541 update to main branch
+3. Release new gem version
+
+### Future Enhancements
+- Phase 2-6 of test infrastructure (data types, multi-ops, error handling, subscriptions)
+- Implement embedded mock server for faster unit tests
+- Consider updating to open62541 v1.5 when stable
+
+---
+
+## 📖 Quick Links
+
+### For Developers
+- [Test Infrastructure Setup](completed/tests/TEST_INFRASTRUCTURE_SETUP.md) - How to run tests
+- [Compiler Warnings Fix](completed/fixes/COMPILER_WARNINGS_FIX_GUIDE.md) - Clean compilation guide
+- [UTF-8 Encoding](completed/fixes/UTF8_ENCODING_FIX.md) - String handling
+
+### For Maintainers
+- [open62541 Update Complete](completed/open62541-update/OPEN62541_V1.4.14_UPDATE_COMPLETE.md) - Update summary
+- [Stability Report](completed/tests/STABILITY_TEST_REPORT.md) - Build reliability
+- [GitHub Actions Fix](completed/fixes/GITHUB_ACTIONS_FIX.md) - CI/CD setup
+
+### For Planning
+- [Mock Server Approach](planning/mock-server-testing-approach.md) - Future testing improvements
+
+---
+
+## 📝 Document Status Legend
+
+- ✅ **Complete** - Work finished and tested
+- ⏳ **Pending** - Awaiting action
+- 📋 **Planning** - Future work under consideration
+- 📚 **Reference** - Background information and analysis
+
+---
+
+**Last Updated:** 2026-01-31
+