release: v3.20.3 - Competitive Analysis Gaps (claudelog.com)

9 gaps filled from claudelog.com competitive analysis (313 pages):
- Section 9.19: Permutation Frameworks (CLAUDE.md-driven variation testing)
- Skeleton Projects workflow (guide/workflows/skeleton-projects.md)
- Task Lists as Diagnostic Tool (instruction clarity mirror)
- Rev the Engine + Mechanic Stacking (multi-round planning patterns)
- Split-Role Sub-Agents (multi-perspective analysis)
- "You Are the Main Thread" mental model (CPU scheduler analogy)
- Continuous Context Update (proactive CLAUDE.md enrichment)
- Smart Hook Dispatching (single entry point routing to handlers)

Guide: 15,771 → 16,293 lines (+522)
New workflow: skeleton-projects.md (208 lines)
Reference: +17 new entries in reference.yaml

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

guide/cheatsheet.md

@@ -6,7 +6,7 @@
 
 **Written with**: Claude (Anthropic)
 
-**Version**: 3.20.2 | **Last Updated**: January 2026
+**Version**: 3.20.3 | **Last Updated**: January 2026
 
 ---
 
@@ -484,4 +484,4 @@ where.exe claude; claude doctor; claude mcp list
 
 **Author**: Florian BRUNIAUX | [@Méthode Aristote](https://methode-aristote.fr) | Written with Claude
 
-*Last updated: January 2026 | Version 3.20.2*
+*Last updated: January 2026 | Version 3.20.3*