chore: updated header comments for TODO and CHANGELOG

roadmap/README.md

@@ -0,0 +1,18 @@
+# MarkiTect Project Roadmap
+
+This roadmap directory contains planning directories for roadmap topics.
+- When starting to implement a topic its directory will be timestamped
+- If implementing multiple topics in parallel use branches
+- Keep current state of what's next to implement in TODO.md
+- See ../history directory for closed topics
+
+## Purpose
+
+This planning documentation serves multiple purposes:
+
+1. **Implementation State Awareness**: Allow for recovery after breaks or breakdowns
+2. **Minimal Plan-Implement Loop**: Don't complicate agentic coding with issue tracking if unnecessary
+3. **Planning Info Analysis**: Keeping the planning info allows for retrospective analyses to optimize
+4. **Clean Repo Structure**: Using roadmap/ for planning and TODO.md as current state helps stay organized
+
+xxx