docs: Comprehensive session wrap-up and project status update

**Session Summary:**
Major milestone achieved with successful Issue #1 implementation and
complete TDD infrastructure restoration. All 32 tests now passing with
validated workflow automation.

**Documentation Updates:**
- ProjectDiary.md: Added comprehensive entry for Issue #1 implementation
  and TDD infrastructure fixes with technical details and achievements
- Next.md: Updated priorities for Issue #2 implementation with clear
  strategy and validated tooling readiness
- ProjectStatusDigest.md: Refreshed status with current metrics, completed
  features, and development progress indicators
- project-assistant.md: Anchored standardized wrap-up routine protocol
  for future session continuity

**Key Accomplishments:**
- Issue #1: Database initialization and front matter parsing (production ready)
- TDD Infrastructure: 100% test success rate (32/32 tests passing)
- Foundation: Solid architecture for implementing remaining issues
- Workflow: Proven TDD cycle with comprehensive coverage analysis

**Next Session Ready:**
Clear roadmap for Issue #2 implementation using validated TDD workflow,
building on proven database foundation with AST integration focus.

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

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

ProjectDiary.md

@@ -4,6 +4,21 @@ This diary tracks major work packages, events, and milestones in the MarkiTect p
 
 ---
 
+## 2025-09-23: Issue #1 Implementation & TDD Infrastructure Restoration
+
+**Progress:** Successfully implemented first core functionality (Issue #1) and resolved complete TDD infrastructure
+**Contributors:** User (bernd.worsch), Claude Code (Sonnet 4)
+**Time Estimate:** ~4-5 hours of development, testing, and debugging
+**AI Resources:** ~35-40 Claude Sonnet 4 conversations, estimated 100K+ tokens
+
+**MAJOR MILESTONE:** Completed the first full production feature implementation using our TDD approach. Issue #1 "Initialize Database and Store Example Markdown File" was successfully implemented with comprehensive test coverage (9 tests) covering database initialization, front matter parsing, and integrated workflows. The implementation includes two new core modules: `markitect/database.py` (DatabaseManager with SQLite operations and JSON front matter storage) and `markitect/frontmatter.py` (FrontMatterParser with YAML parsing and graceful error handling). Key technical achievement was the complete TDD RED→GREEN→REFACTOR cycle validation, proving our development approach is sound. Added PyYAML dependency and comprehensive error handling for production readiness.
+
+**CRITICAL INFRASTRUCTURE FIX:** Resolved 9 failing TDD infrastructure tests that were blocking development productivity. Root cause was API mismatches between test expectations and actual WorkspaceManager implementation, including incorrect config object initialization, return type mismatches (Path vs Workspace objects), and missing methods (add_test_to_workspace, get_workspace_status). The fix involved comprehensive test corrections, API enhancements, and proper enum handling. Result: 100% test success rate (32/32 tests passing) and fully operational TDD infrastructure.
+
+**FOUNDATION ESTABLISHED:** Issue #1 provides the essential database and front matter processing foundation that all subsequent MarkiTect features will build upon. The implementation successfully handles the exact example content specified in the issue requirements and demonstrates the effectiveness of our TDD approach for complex feature development. This validates our technical architecture and establishes confidence in the development methodology for tackling the remaining 10+ issues in the backlog.
+
+---
+
 ## 2025-09-23: Test Coverage Assessment System & Critical Bug Fix
 
 **Progress:** Built comprehensive test coverage analysis system and resolved critical false positive bug