Add comprehensive SDK improvement plan for Phases 2-4

This commit introduces a detailed improvement plan that outlines the
strategic evolution of the Wiki.js Python SDK from v0.1.0 (MVP) to
v1.0.0 (Enterprise-grade).

Key additions:

1. **IMPROVEMENT_PLAN.md** - Comprehensive 47-page specification
   - Phase 2: Essential Features + Async Support (v0.2.0)
     * Async/await implementation with aiohttp
     * API expansion: Users, Groups, Assets
     * Auto-pagination support
     * Dual sync/async client architecture

   - Phase 3: Reliability & Performance (v0.3.0)
     * Intelligent caching layer (Memory, Redis, File)
     * GraphQL batch operations
     * Rate limiting & throttling
     * Circuit breaker & enhanced retry logic

   - Phase 4: Advanced Features (v1.0.0)
     * Advanced CLI with rich formatting
     * Plugin architecture for extensibility
     * Webhook support for event handling

2. **CLAUDE.md updates**
   - Updated phase definitions with detailed task breakdowns
   - Added Phase 2 implementation steps and quality gates
   - Included success criteria and time estimates
   - Enhanced development guidelines for Phase 2
   - Updated current focus from Phase 1 to Phase 2

Implementation strategy:
- Test-driven development with >95% coverage
- Documentation alongside code development
- Quality gates at every checkpoint
- Backward compatibility guaranteed
- Performance benchmarks for all features

Timeline: ~17 weeks total (4 months to v1.0.0)

This plan ensures we deliver production-ready, enterprise-grade
features while maintaining the highest quality standards throughout.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -155,82 +155,308 @@ Task_Breakdown:
     Note: "GitHub-only deployment strategy implemented"
 ```
 
-### **Phase 2: Essential Features (0% COMPLETE) ⏳**
+### **Phase 2: Essential Features + Async Support (0% COMPLETE) ⏳**
 ```yaml
-Status: PLANNED
+Status: READY_TO_START
 Completion: 0%
-Target_Start: "After Phase 1 Complete"
+Target_Duration: "3-4 weeks"
+Target_Version: "v0.2.0"
+Current_Task: "Task 2.1 - Async/Await Implementation"
+
+Task_Breakdown:
+  Task_2.1_Async_Support:              # ⏳ READY
+    Status: "READY"
+    Completion: 0%
+    Priority: "HIGH"
+    Estimated_Time: "15-17 hours"
+    AI_Sessions: "50-65"
+    Key_Deliverables:
+      - Dual client architecture (sync + async)
+      - AsyncWikiJSClient with aiohttp
+      - Async endpoint handlers
+      - Performance benchmarks (>3x improvement)
+
+  Task_2.2_API_Expansion:              # ⏳ READY
+    Status: "READY"
+    Completion: 0%
+    Priority: "HIGH"
+    Estimated_Time: "22-28 hours"
+    AI_Sessions: "80-100"
+
+    Subtasks:
+      - Users API (8-10h, 30-35 sessions)
+      - Groups API (6-8h, 25-30 sessions)
+      - Assets API (8-10h, 30-35 sessions)
+      - Auto-Pagination (4-5h, 15-20 sessions)
+
+  Task_2.3_Testing_Documentation:      # ⏳ READY
+    Status: "READY"
+    Completion: 0%
+    Priority: "HIGH"
+    Estimated_Time: "8-10 hours"
+    AI_Sessions: "30-40"
+    Requirements:
+      - >95% test coverage for all new features
+      - Complete API documentation
+      - Usage examples for each API
+      - Performance benchmarks
+
+Success_Criteria:
+  - [ ] Async client achieves >3x throughput vs sync
+  - [ ] All Wiki.js APIs covered (Pages, Users, Groups, Assets)
+  - [ ] >90% overall test coverage
+  - [ ] Complete documentation with examples
+  - [ ] Beta testing with 3+ users completed
+
+Reference: "See docs/IMPROVEMENT_PLAN.md for detailed specifications"
 ```
 
 ### **Phase 3: Reliability & Performance (0% COMPLETE) ⏳**
 ```yaml
 Status: PLANNED
 Completion: 0%
+Target_Duration: "3-4 weeks"
+Target_Version: "v0.3.0"
 Target_Start: "After Phase 2 Complete"
+
+Task_Breakdown:
+  Task_3.1_Intelligent_Caching:        # ⏳ PLANNED
+    Status: "PLANNED"
+    Completion: 0%
+    Estimated_Time: "10-12 hours"
+    AI_Sessions: "35-40"
+    Features:
+      - Pluggable cache backends (Memory, Redis, File)
+      - Smart invalidation strategies
+      - Thread-safe implementation
+      - Cache hit ratio >80%
+
+  Task_3.2_Batch_Operations:           # ⏳ PLANNED
+    Status: "PLANNED"
+    Completion: 0%
+    Estimated_Time: "8-10 hours"
+    AI_Sessions: "30-35"
+    Features:
+      - GraphQL batch query optimization
+      - Batch CRUD operations
+      - Partial failure handling
+      - >10x performance improvement
+
+  Task_3.3_Rate_Limiting:              # ⏳ PLANNED
+    Status: "PLANNED"
+    Completion: 0%
+    Estimated_Time: "5-6 hours"
+    AI_Sessions: "20-25"
+    Features:
+      - Token bucket algorithm
+      - Configurable rate limits
+      - Per-endpoint limits
+      - Graceful handling
+
+  Task_3.4_Circuit_Breaker:            # ⏳ PLANNED
+    Status: "PLANNED"
+    Completion: 0%
+    Estimated_Time: "8-10 hours"
+    AI_Sessions: "30-35"
+    Features:
+      - Circuit breaker pattern
+      - Enhanced retry with exponential backoff
+      - Automatic recovery
+      - Failure detection <100ms
+
+Success_Criteria:
+  - [ ] Caching improves performance >50%
+  - [ ] Batch operations >10x faster
+  - [ ] System handles 1000+ concurrent requests
+  - [ ] Circuit breaker prevents cascading failures
+  - [ ] 24+ hour stability tests pass
+
+Reference: "See docs/IMPROVEMENT_PLAN.md for detailed specifications"
 ```
 
 ### **Phase 4: Advanced Features (0% COMPLETE) ⏳**
 ```yaml
 Status: PLANNED
 Completion: 0%
+Target_Duration: "4-5 weeks"
+Target_Version: "v1.0.0"
 Target_Start: "After Phase 3 Complete"
+
+Task_Breakdown:
+  Task_4.1_Advanced_CLI:               # ⏳ PLANNED
+    Status: "PLANNED"
+    Completion: 0%
+    Estimated_Time: "12-15 hours"
+    Features:
+      - Interactive mode
+      - Rich formatting
+      - Progress bars
+      - Bulk operations
+
+  Task_4.2_Plugin_Architecture:        # ⏳ PLANNED
+    Status: "PLANNED"
+    Completion: 0%
+    Estimated_Time: "10-12 hours"
+    Features:
+      - Middleware system
+      - Custom auth providers
+      - Plugin ecosystem
+      - Extension points
+
+  Task_4.3_Webhook_Support:            # ⏳ PLANNED
+    Status: "PLANNED"
+    Completion: 0%
+    Estimated_Time: "8-10 hours"
+    Features:
+      - Webhook server
+      - Event handlers
+      - Signature verification
+      - Async event processing
+
+Success_Criteria:
+  - [ ] CLI covers all major operations
+  - [ ] Plugin system supports common use cases
+  - [ ] Webhook handling is secure and reliable
+  - [ ] Feature parity with official SDKs
+  - [ ] Enterprise production deployments
+
+Reference: "See docs/IMPROVEMENT_PLAN.md for detailed specifications"
 ```
 
 ---
 
-## 🎯 CURRENT FOCUS: TASK 1.1 - PROJECT FOUNDATION
+## 🎯 CURRENT FOCUS: PHASE 2 - ESSENTIAL FEATURES + ASYNC SUPPORT
 
-### **Task 1.1 Detailed Breakdown**
+### **Phase 1 Completion Summary** ✅
 ```yaml
-Task: "Project Foundation Setup"
+Phase_1_Status: "COMPLETE"
-Status: "IN_PROGRESS"
+Completion: 100%
-Priority: "HIGH"
+Delivered:
-Completion: 0%
+  - ✅ Complete project foundation
+  - ✅ Core WikiJSClient implementation
+  - ✅ Authentication system (API Key + JWT)
+  - ✅ Pages API (full CRUD operations)
+  - ✅ Comprehensive test suite (>85% coverage)
+  - ✅ Complete documentation and examples
+  - ✅ Gitea-only deployment ready
 
-Subtasks:
+Ready_For: "Phase 2 Development"
-  1.1.1_Repository_Structure:
-    Description: "Create basic project file structure"
-    Status: "PENDING"
-    Files_To_Create:
-      - docs/CONTRIBUTING.md
-      - LICENSE (MIT)
-      - .gitignore
-      - setup.py
-      - pyproject.toml
-      - requirements.txt
-      - requirements-dev.txt
-    
-  1.1.2_Python_Packaging:
-    Description: "Configure Python packaging and dependencies"
-    Status: "PENDING" 
-    Files_To_Create:
-      - setup.py with full configuration
-      - pyproject.toml with tool configurations
-      - requirements.txt with core dependencies
-      - requirements-dev.txt with development tools
-    
-  1.1.3_CI_CD_Pipeline:
-    Description: "Set up GitHub Actions workflows"
-    Status: "PENDING"
-    Files_To_Create:
-      - .gitea/workflows/test.yml
-      - .gitea/workflows/release.yml
-    
-  1.1.4_Initial_Documentation:
-    Description: "Create contributor-focused documentation"
-    Status: "PENDING"
-    Files_To_Create:
-      - docs/CONTRIBUTING.md (detailed contribution guide)
-      - docs/CHANGELOG.md (version history template)
 ```
 
-### **Completion Criteria for Task 1.1**
+### **Phase 2 - Ready to Start** 🚀
-- [ ] All repository structure files created
+
-- [ ] Python packaging properly configured
+**NEXT IMMEDIATE ACTION**: Begin Task 2.1 - Async/Await Implementation
-- [ ] CI/CD pipeline functional
+
-- [ ] Contributing guidelines complete
+#### **Task 2.1: Async/Await Implementation (READY)**
-- [ ] All files pass linting and validation
+```yaml
-- [ ] **UPDATE PROGRESS**: Set Task_1.1 completion to 100%
+Priority: "HIGH"
+Status: "READY_TO_START"
+Target_Completion: "Week 2 of Phase 2"
+
+Implementation_Steps:
+  Step_1_Architecture:
+    Description: "Create wikijs/aio/ module structure"
+    Files_To_Create:
+      - wikijs/aio/__init__.py
+      - wikijs/aio/client.py
+      - wikijs/aio/endpoints/__init__.py
+      - wikijs/aio/endpoints/base.py
+      - wikijs/aio/endpoints/pages.py
+    Estimated: "3-4 hours"
+
+  Step_2_AsyncClient:
+    Description: "Implement AsyncWikiJSClient with aiohttp"
+    Key_Features:
+      - Async context manager support
+      - aiohttp.ClientSession management
+      - Async _arequest() method
+      - Connection pooling configuration
+    Estimated: "6-8 hours"
+
+  Step_3_AsyncEndpoints:
+    Description: "Create async endpoint classes"
+    Files_To_Create:
+      - Async versions of all Page operations
+      - AsyncPagesEndpoint implementation
+      - Reuse existing models and exceptions
+    Estimated: "4-5 hours"
+
+  Step_4_Testing:
+    Description: "Comprehensive async testing"
+    Test_Requirements:
+      - Unit tests (>95% coverage)
+      - Integration tests with real Wiki.js
+      - Concurrent request tests (100+ requests)
+      - Performance benchmarks (async vs sync)
+    Estimated: "4-5 hours"
+
+  Step_5_Documentation:
+    Description: "Async usage documentation"
+    Files_To_Create:
+      - docs/async_usage.md
+      - examples/async_basic_usage.py
+      - Update README.md with async examples
+    Estimated: "2-3 hours"
+
+Quality_Gates:
+  - [ ] All async methods maintain same interface as sync
+  - [ ] Performance benchmarks show >3x improvement
+  - [ ] No resource leaks (proper cleanup)
+  - [ ] All tests pass with >95% coverage
+  - [ ] Documentation covers 100% of async functionality
+
+Success_Metrics:
+  - Async client handles 100+ concurrent requests
+  - >3x throughput compared to sync client
+  - Zero breaking changes to existing sync API
+  - Clear migration guide for sync → async
+```
+
+#### **Task 2.2: API Expansion (NEXT)**
+**Status**: Starts after Task 2.1 complete
+**Priority**: HIGH
+
+Priority order:
+1. Users API (Week 3)
+2. Groups API (Week 3-4)
+3. Assets API (Week 4)
+4. Auto-Pagination (Week 4)
+
+See `docs/IMPROVEMENT_PLAN.md` for detailed specifications.
+
+---
+
+## 📋 DEVELOPMENT GUIDELINES FOR PHASE 2
+
+### **Before Starting Each Task**:
+1. [ ] Review task specifications in `docs/IMPROVEMENT_PLAN.md`
+2. [ ] Check architectural guidelines in `docs/wikijs_sdk_architecture.md`
+3. [ ] Review risk considerations in `docs/RISK_MANAGEMENT.md`
+4. [ ] Update CLAUDE.md with task status
+
+### **During Development**:
+1. [ ] Follow TDD approach (write tests first)
+2. [ ] Maintain >95% test coverage for new code
+3. [ ] Update documentation alongside code
+4. [ ] Run quality checks continuously (black, mypy, flake8)
+5. [ ] Update progress in CLAUDE.md after each step
+
+### **After Completing Each Task**:
+1. [ ] All quality gates pass
+2. [ ] Integration tests pass with real Wiki.js instance
+3. [ ] Documentation reviewed and complete
+4. [ ] Update CLAUDE.md completion percentages
+5. [ ] Commit with descriptive message
+6. [ ] Prepare for next task
+
+### **Quality Standards** (Non-Negotiable):
+- ✅ Test coverage >95% for new features
+- ✅ Type hints on 100% of public APIs
+- ✅ Docstrings on 100% of public methods
+- ✅ Black formatting passes
+- ✅ MyPy strict mode passes
+- ✅ Flake8 with zero errors
+- ✅ Bandit security scan passes
 
 ---
 
@@ -504,18 +730,52 @@ This document evolves based on development experience:
 
 ---
 
-## 🚀 READY FOR DEVELOPMENT
+## 🚀 READY FOR PHASE 2 DEVELOPMENT
 
-**CURRENT INSTRUCTION**: Phase 1 Complete - Gitea-Only Deployment Ready
+**CURRENT STATUS**: ✅ Phase 1 Complete - Ready for Phase 2
 
-**FOCUS**: Project is ready for GitHub-only installation and usage
+**CURRENT INSTRUCTION**: Begin Phase 2 - Essential Features + Async Support
 
-**SUCCESS CRITERIA**: Users can install via `pip install git+https://gitea.hotserv.cloud/lmiranda/wikijs-sdk-python.git`
+**IMMEDIATE NEXT TASK**: Task 2.1 - Async/Await Implementation
 
-**DEPLOYMENT STRATEGY**: Gitea-only (no PyPI publishing required)
+**FOCUS AREAS**:
+1. **Primary**: Implement dual sync/async client architecture
+2. **Secondary**: Expand API coverage (Users, Groups, Assets)
+3. **Tertiary**: Auto-pagination and developer experience improvements
 
-**REMEMBER**: Always refer to documentation, update progress, and maintain quality standards!
+**KEY DOCUMENTS TO REFERENCE**:
+- `docs/IMPROVEMENT_PLAN.md` - Detailed implementation specifications
+- `docs/wikijs_sdk_architecture.md` - Architectural patterns
+- `docs/RISK_MANAGEMENT.md` - Risk mitigation strategies
+- This file (CLAUDE.md) - Progress tracking and coordination
+
+**PHASE 2 SUCCESS CRITERIA**:
+- [ ] Async client achieves >3x throughput vs sync (100 concurrent requests)
+- [ ] Complete API coverage: Pages, Users, Groups, Assets
+- [ ] >90% overall test coverage maintained
+- [ ] Comprehensive documentation with examples for all APIs
+- [ ] Beta testing completed with 3+ users
+- [ ] Zero breaking changes to existing v0.1.0 functionality
+
+**DEPLOYMENT STRATEGY**:
+- Maintain backward compatibility with v0.1.0
+- Gitea-only deployment continues
+- Users install via: `pip install git+https://gitea.hotserv.cloud/lmiranda/wikijs-sdk-python.git@v0.2.0`
+
+**DEVELOPMENT PRINCIPLES**:
+1. ✅ **Test-Driven Development**: Write tests first, then implementation
+2. ✅ **Documentation Alongside Code**: Update docs as you build
+3. ✅ **Quality Gates**: Every commit must pass linting, typing, and tests
+4. ✅ **Progress Tracking**: Update CLAUDE.md after every major step
+5. ✅ **Backward Compatibility**: No breaking changes without explicit approval
+
+**REMEMBER**:
+- Always refer to `docs/IMPROVEMENT_PLAN.md` for detailed specifications
+- Update progress tracking in CLAUDE.md after each task
+- Maintain quality standards: >95% coverage, full type hints, complete docs
+- Run quality checks continuously (black, mypy, flake8, bandit)
+- Commit frequently with clear, descriptive messages
 
 ---
 
-**🤖 AI Developer: You are ready to begin professional SDK development. Follow this coordinator for guidance, track progress diligently, and build something amazing!**
+**🤖 AI Developer: Phase 1 is complete! You are now ready to evolve the SDK with async support and expanded APIs. Follow the improvement plan, maintain quality standards, and build something enterprise-grade!**