docs: add 2 resource evaluations (Osmani LinkedIn + Beyond Vibe Coding)

Added:
- Resource Evaluation: Addy Osmani LinkedIn Post (scored 2/5, Marginal)
  - Post about Anthropic study (17% comprehension gap)
  - 100% overlap with Shen & Tamkin 2026 already documented
  - Decision: Tracking mention only (mainstream diffusion timeline)
  - New criterion: "Influencer Amplification" pattern documented

- Resource Evaluation: "Beyond Vibe Coding" Book (scored 3/5, Pertinent)
  - Comprehensive O'Reilly book by Addy Osmani
  - 90% overlap analysis (10/14 topics covered 100%)
  - Decision: Minimal integration (tracking mention + cross-refs)
  - Cross-validation with 2 Osmani articles already integrated

Updated:
- CHANGELOG.md: [Unreleased] section with detailed entries
- README.md: Resource evaluations count (36 → 38 assessments)

Files created:
- docs/resource-evaluations/addy-osmani-linkedin-anthropic-study.md
- docs/resource-evaluations/beyond-vibe-coding.md
- docs/resource-evaluations/nick-tune-feedback-loops.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: "3.20.7"
+version: "3.20.8"
 updated: "2026-02-01"
 
 # ════════════════════════════════════════════════════════════════
@@ -927,7 +927,7 @@ ecosystem:
       - "Cross-links modified → Update all 4 repos"
     history:
       - date: "2026-01-20"
-        event: "Code Landing sync v3.20.7, 66 templates, cross-links"
+        event: "Code Landing sync v3.20.8, 66 templates, cross-links"
         commit: "5b5ce62"
       - date: "2026-01-20"
         event: "Cowork Landing fix (paths, README, UI badges)"