release: version 3.17.1 - README V3 with Repository Structure diagram

### Added
- Repository Structure diagram (Mermaid + ASCII collapsible)
- 4 missing guides in Core Documentation table
- Quiz online link (landing site)

### Changed
- README V3: merged best of both versions (WHY/HOW positioning + complete sections)
- Ecosystem positioning: complementary instead of competitive
- Core Documentation: added AI Ecosystem, AI Traceability, Search Tools, Learning with AI

### Removed
- README-new.md (merged into README.md)

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

machine-readable/reference.yaml

@@ -3,7 +3,7 @@
 # Source: guide/ultimate-guide.md
 # Purpose: Condensed index for LLMs to quickly answer user questions about Claude Code
 
-version: "3.17.0"
+version: "3.17.1"
 updated: "2026-01-27"
 
 # ════════════════════════════════════════════════════════════════
@@ -789,7 +789,7 @@ ecosystem:
       - "Cross-links modified → Update all 4 repos"
     history:
       - date: "2026-01-20"
-        event: "Code Landing sync v3.17.0, 66 templates, cross-links"
+        event: "Code Landing sync v3.17.1, 66 templates, cross-links"
         commit: "5b5ce62"
       - date: "2026-01-20"
         event: "Cowork Landing fix (paths, README, UI badges)"