diff --git a/CHANGELOG.md b/CHANGELOG.md
index 616d395..2dfbe9c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,35 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Added
 
-(No unreleased changes)
+- **Resource Evaluation: Addy Osmani LinkedIn Post** (scored 2/5, Marginal - Tracking mention only) — Post about Anthropic study (17% comprehension gap) evaluated but not integrated due to 100% overlap with primary source already documented (`docs/resource-evaluations/addy-osmani-linkedin-anthropic-study.md`)
+  - **Content**: LinkedIn post (Feb 1, 2026, 246K reach) citing Shen & Tamkin 2026 study on AI-assisted learning
+  - **Key claims verified**: 17% comprehension gap, 2-minute productivity gain, "thinking partner vs code vending machine" framing
+  - **Overlap**: 100% with arXiv:2601.20245 already cited 3× in `guide/learning-with-ai.md` (lines 114, 868, 890)
+  - **Decision**: Minimal integration (1-2 line tracking mention) to document mainstream diffusion timeline without content duplication
+  - **Challenge phase**: Technical-writer agent confirmed score 2/5 content but noted 3/5 ecosystem context (authority messager + diffusion milestone)
+  - **New criterion documented**: "Influencer Amplification" pattern for future evaluations (reach >100K + timeline awareness)
+- **Resource Evaluation: "Beyond Vibe Coding" Book** (scored 3/5, Pertinent - Minimal integration) — Comprehensive O'Reilly book by Addy Osmani evaluated for 90%+ overlap with existing guide content (`docs/resource-evaluations/beyond-vibe-coding.md`)
+  - **Content**: 6-chapter book (Intro/Principles/Advanced Techniques/CLI Agents/Production/Future Trends) published 2025, paid format ($B0F6S5425Y Amazon), freemium web content at beyond.addy.ie
+  - **Key frameworks**: The 70% Problem (AI accelerates 70%, final 30% needs rigor), Context Engineering as RAM metaphor, Critique-Driven Development, MCP as "USB-C for AI", Multi-Agent Orchestration
+  - **Overlap analysis**: 14 aspects compared — 10/14 already covered 100% (Vibe Coding, Context Engineering, MCP, Multi-Agent, Plan Mode, TDD, Spec-First, Visual Context, Production Safety)
+  - **Gap identified**: Critique-Driven Development framework not explicitly documented (conceptually covered via code review workflows), Few-Shot Prompting technique, Cost-Benefit Analysis Framework
+  - **Cross-validation**: Osmani's "80% Problem" article already evaluated 3/5 (ai-ecosystem.md:2024), "Good Spec" article already integrated 4/5 (workflows/spec-first.md)
+  - **Decision**: Tracking mention (3-5 lines in ai-ecosystem.md:2024) + cross-ref citations (1-2 lines in 4-5 overlapping sections) + "Context as RAM" metaphor note (methodologies.md:192)
+  - **Rationale**: Book = external validation/synthesis, but guide already more comprehensive (11K lines vs paid book). Rejected full integration (paid resource, 90% duplication, 2 Osmani articles already integrated)
+
+## [3.20.8] - 2026-02-01
+
+### Updated
+
+- **RTK (Rust Token Killer) Evaluation** — Major update from v0.2.0 to v0.7.0 (score upgraded from 4/5 to 4.5/5, +0.43 points) (`docs/resource-evaluations/rtk-evaluation.md`)
+  - **All critical gaps resolved**: pnpm support (v0.6.0), npm/vitest (v0.6.0), git arg parsing bug fixed (v0.7.0), grep/ls broken commands fixed (v0.7.0), GitHub CLI support (v0.6.0), Cargo commands (v0.6.0), analytics system (`rtk gain` v0.4.0, `rtk discover` v0.7.0), auto-rewrite hook for Claude Code PreToolUse (v0.7.0)
+  - **Evolution**: 5 major releases in 9 days (2026-01-23 → 2026-02-01) with 10+ community PRs merged (FlorianBruniaux contributions integrated upstream)
+  - **Architecture maturity**: 24 command modules (was 12), 9 filtering strategies (50-99% reduction), SQLite token tracking (`~/.local/share/rtk/history.db`), configuration system (`~/.config/rtk/config.toml`), ARCHITECTURE.md documentation
+  - **Community growth**: 17 stars (+113% from 8), 2 forks (+200% from 0), 1 open issue, 2+ contributors (active development)
+  - **Score breakdown**: Accuracy +1 (3→4, bugs fixed), Comprehensiveness +1 (4→5, full stack coverage), Production Readiness +1 (3→4, architecture docs), Community +1 (2→3, growth trajectory)
+  - **Token reduction**: 72.6% (git only, v0.2.0) → 89.4% (full stack estimate, v0.7.0) with 85% command coverage (was 40%)
+  - **Recommendation updated**: "GOOD (4/5) - git-only, bugs, experimental" → "EXCELLENT (4.5/5) - production-ready for early adopters, full modern dev stack (git, pnpm, npm, cargo, gh)"
+  - **Fork status**: Fork (FlorianBruniaux/rtk) no longer needed — all features merged upstream, use `pszymkowiak/rtk` v0.7.0 directly
 
 ## [3.20.7] - 2026-02-01
 
diff --git a/README.md b/README.md
index a607948..390ce35 100644
--- a/README.md
+++ b/README.md
@@ -424,7 +424,7 @@ cd quiz && npm install && npm start
 </details>
 
 <details>
-<summary><strong>Resource Evaluations</strong> (36 assessments)</summary>
+<summary><strong>Resource Evaluations</strong> (38 assessments)</summary>
 
 Systematic evaluation of external resources (tools, methodologies, articles) before integration into the guide.
 
@@ -485,7 +485,7 @@ See [CONTRIBUTING.md](./CONTRIBUTING.md) for guidelines.
 
 ---
 
-*Version 3.20.7 | February 2026 | Crafted with Claude*
+*Version 3.20.8 | February 2026 | Crafted with Claude*
 
 <!-- SEO Keywords -->
 <!-- claude code, claude code tutorial, anthropic cli, ai coding assistant, claude code mcp,
diff --git a/VERSION b/VERSION
index 8e011b7..c927331 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.20.7
+3.20.8
diff --git a/docs/resource-evaluations/addy-osmani-linkedin-anthropic-study.md b/docs/resource-evaluations/addy-osmani-linkedin-anthropic-study.md
new file mode 100644
index 0000000..ed7cae3
--- /dev/null
+++ b/docs/resource-evaluations/addy-osmani-linkedin-anthropic-study.md
@@ -0,0 +1,162 @@
+# Resource Evaluation: Addy Osmani LinkedIn Post - Anthropic Study
+
+**Date**: 2026-02-01
+**Evaluator**: Claude (Sonnet 4.5)
+**URL**: https://www.linkedin.com/posts/addyosmani_ai-programming-softwareengineering-activity-7423836698100416513-H0W4
+**Author**: Addy Osmani (Engineering Leader, Google)
+**Publication Date**: February 1, 2026
+**Reach**: 246,805 followers
+
+---
+
+## Summary
+
+LinkedIn post by Addy Osmani summarizing Anthropic research on AI-assisted development. Post cites study showing 17% comprehension gap between developers using AI assistance vs manual coding, with conceptual questioning as key differentiator between successful and unsuccessful AI usage patterns.
+
+**Key points**:
+- Developers using AI scored 17% lower on comprehension tests (nearly two letter grades)
+- Productivity gains "super marginal" (about 2 minutes faster)
+- Developers who asked conceptual questions ("why?") matched control group performance
+- Framework: AI as "tutor explaining the journey" vs "code vending machine dispensing answers"
+
+---
+
+## Evaluation Scoring
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| **Relevance** | 2/5 | 100% overlap with primary source already documented |
+| **Originality** | 1/5 | Secondary source citing existing research |
+| **Authority** | 5/5 | Addy Osmani (Google), 246K followers |
+| **Accuracy** | 5/5 | All claims verified in original post |
+| **Media Impact** | 4/5 | Mainstream diffusion of academic research |
+
+**Overall Score**: **2/5 (Marginal - Tracking mention only)**
+
+---
+
+## Gap Analysis
+
+### Already Covered in Guide
+
+| Osmani Post | Guide Coverage | Location |
+|-------------|----------------|----------|
+| 17% comprehension gap | ✅ Documented with methodology | learning-with-ai.md:114, 868, 890 |
+| Conceptual questions pattern | ✅ UVAL protocol | learning-with-ai.md:208-432 |
+| Vibe coding concept | ✅ With Karpathy source | learning-with-ai.md:81-96 |
+| Productivity claims | ✅ Nuanced research review | learning-with-ai.md:100-153 |
+| Thinking partner framing | ⚠️ Conceptually covered | Via UVAL, not exact vocabulary |
+
+### What's New
+
+- **"Thinking partner vs code vending machine"** — Memorable pedagogical framing (vocabulary only, concept covered)
+- **246K reach** — Mainstream diffusion milestone (timeline awareness)
+- **Feb 1, 2026 publication** — Temporal marker for community awareness
+- **References "Beyond Vibe Coding"** — Pointer to book resource (evaluated separately)
+
+---
+
+## Fact-Check Results
+
+| Claim | Verified | Source/Notes |
+|-------|----------|--------------|
+| **17% comprehension gap** | ✅ | Post text: "scored 17% lower on comprehension tests" |
+| **2 minutes faster** | ✅ | Post text: "about 2 minutes faster" |
+| **Anthropic study** | ✅ | Post cites "Anthropic's new study" with link |
+| **Thinking partner framing** | ✅ | Post text: "tutor explaining the journey, not a vending machine" |
+| **Feb 1, 2026 date** | ✅ | JSON timestamp: 2026-02-01T21:16:37.026Z |
+| **"Beyond Vibe Coding" reference** | ✅ | Post mentions previous article (book not found on Substack) |
+| **246K followers** | ✅ | LinkedIn profile verified |
+
+**Confidence**: High (all claims verified in source)
+
+---
+
+## Technical Writer Challenge
+
+Agent challenged evaluation methodology, recommending distinction between content score (2/5) and ecosystem context score (3/5):
+
+**Key arguments**:
+1. **Content pure**: 2/5 justified (100% overlap with Shen & Tamkin arXiv paper)
+2. **Ecosystem value**: 3/5 when considering authority messenger (246K) + diffusion timeline
+3. **Not binary decision**: Tracking mention (1-2 lines) preserves historical context without duplication
+4. **Pattern identification**: "Influencer Amplification" as new evaluation criterion for future resources
+
+**Accepted**: Maintain 2/5 overall, add tracking mention (minimal integration)
+
+---
+
+## Integration Decision
+
+**Action**: **Tracking mention only** (1-2 lines)
+
+**Location**: `guide/learning-with-ai.md:890` (after Shen & Tamkin citation)
+
+**Format**:
+```markdown
+- **AI Impacts on Skill Formation (Shen & Tamkin, 2026)** — [arXiv:2601.20245](https://arxiv.org/abs/2601.20245) — Anthropic Fellows RCT (52 devs learning Python Trio with/without GPT-4o): AI group scored 17% lower on skills quiz (Cohen's d=0.738, p=0.01) with no significant speed gain. Identified 6 interaction patterns — 3 preserving learning (conceptual inquiry, hybrid explanation, generation-then-comprehension) via active cognitive engagement.
+  - **Mainstream coverage**: [Addy Osmani LinkedIn](https://www.linkedin.com/posts/addyosmani_ai-programming-softwareengineering-activity-7423836698100416513-H0W4) (246K reach, Feb 2026) — framed as "thinking partner vs code vending machine"
+```
+
+**Rationale**:
+- Recognizes diffusion value (timeline awareness)
+- Avoids content duplication (primary source already documented)
+- Preserves historical context (when community awareness emerged)
+- Minimal token cost (1 line)
+
+---
+
+## Risks of NOT Integrating
+
+**Low Impact**:
+1. No technical content loss (primary source already documented)
+2. No unique insights missing (framing covered conceptually via UVAL)
+3. Timeline awareness gap (minor — not critical to guide utility)
+
+**Medium Impact**:
+1. Potential inconsistency (Osmani "80% Problem" documented, this post not)
+2. Missing mainstream diffusion marker (6 months from now, useful context)
+
+**Decision**: Minimal integration (tracking mention) = low cost, preserves context
+
+---
+
+## New Evaluation Criterion: Influencer Amplification
+
+**Pattern identified**: Secondary sources with high reach (>100K followers) that amplify academic research warrant tracking mentions even when content is 100% redundant.
+
+**Rationale**:
+- Guide documents ecosystem evolution, not just technical content
+- Timeline awareness = useful historical context
+- Mainstream diffusion ≠ technical novelty but has archival value
+
+**Application for future evaluations**:
+
+| Criterion | Threshold | Action |
+|-----------|-----------|--------|
+| **Reach** | >100K followers | +1 ecosystem score |
+| **Novelty** | 0% (pure citation) | Content score 1/5 |
+| **Authority** | Established practitioner | Credibility validated |
+| **Timeline** | Temporal marker | Tracking mention justified |
+
+**Example**: If 3+ major figures (>100K each) cite same study → "Media Coverage" subsection warranted
+
+---
+
+## Decision
+
+**Final Score**: **2/5 (Marginal - Tracking mention only)**
+
+**Action**: **MINIMAL INTEGRATION**
+- Add 1-2 line tracking mention under Shen & Tamkin citation
+- Document "Influencer Amplification" pattern for methodology
+- Cross-reference "Beyond Vibe Coding" book (evaluated separately)
+
+**Priority**: **Low** (opportunistic, next batch of updates)
+
+**Rationale**: Post has archival value (diffusion timeline, vocabulary framing) but zero technical content beyond primary source already documented. Tracking mention = low cost, preserves completeness without duplication.
+
+---
+
+**Integration Status**: ⏳ **PENDING**
+**Files to Modify**: learning-with-ai.md (+1-2 lines), this evaluation file
diff --git a/docs/resource-evaluations/beyond-vibe-coding.md b/docs/resource-evaluations/beyond-vibe-coding.md
new file mode 100644
index 0000000..b719514
--- /dev/null
+++ b/docs/resource-evaluations/beyond-vibe-coding.md
@@ -0,0 +1,269 @@
+# Resource Evaluation: "Beyond Vibe Coding" - Addy Osmani
+
+**Date**: 2026-02-01
+**Evaluator**: Claude (Sonnet 4.5)
+**URL**: https://beyond.addy.ie
+**Author**: Addy Osmani (Engineering Leader, Google)
+**Publisher**: O'Reilly Media
+**Publication Date**: 2025
+**Format**: Paid book ($B0F6S5425Y Amazon) + freemium web content
+**External References**:
+- Perplexity Deep Research: "Beyond Vibe Coding" book analysis
+- Simon Willison blog post (Sept 4, 2025) on title change from "Vibe Coding"
+- Gergely Orosz (Pragmatic Engineer) podcast interview (Oct 29, 2025)
+
+---
+
+## Summary
+
+Comprehensive book guiding developers from "vibe coding" (rapid AI-assisted prototyping without deep understanding) to professional AI-aided engineering practices. Published by O'Reilly, covers multiple AI coding tools (Claude Code, Cursor, GitHub Copilot, Gemini CLI) with practical strategies for production-ready development.
+
+**Six-chapter structure**:
+1. **Intro & Spectrum** — Defining vibe coding vs AI-assisted engineering
+2. **Principles & Best Practices** — Context, trust, planning, documentation
+3. **Advanced Techniques** — Prompt engineering, context engineering, MCP
+4. **CLI Agents & Orchestrators** — Terminal-based tools and multi-agent systems
+5. **Production-Ready Development** — Security, testing, SDLC integration
+6. **Future Trends** — Autonomous agents, visual development, reasoning models
+
+**Key frameworks**:
+- **The 70% Problem**: AI accelerates 70% of development, final 30% requires engineering rigor
+- **Context Engineering as OS Metaphor**: Context window = CPU RAM (dynamic loading/memory management)
+- **Critique-Driven Development**: Convert code review feedback into AI prompts
+- **MCP as "USB-C for AI"**: Standardized protocol for tool integration
+- **Two-Dimensional Framework**: Technical proficiency × AI abstraction levels
+
+---
+
+## Evaluation Scoring
+
+| Criterion | Score | Notes |
+|-----------|-------|-------|
+| **Relevance** | 3/5 | Pertinent but 90% overlap with existing guide content |
+| **Originality** | 2/5 | Synthesis/expansion of author's previous articles |
+| **Authority** | 5/5 | Addy Osmani (Google, O'Reilly author), well-respected |
+| **Comprehensiveness** | 4/5 | Thorough coverage across 6 chapters |
+| **Actionability** | 4/5 | Practical patterns and templates |
+| **Accessibility** | 2/5 | Paid book (vs open-source guide) |
+
+**Overall Score**: **3/5 (Pertinent - Minimal integration)**
+
+---
+
+## Comparative Analysis
+
+### Overlap with Guide (14 Aspects Analyzed)
+
+| Aspect | Beyond Vibe Coding | Claude Code Ultimate Guide |
+|--------|-------------------|----------------------------|
+| **Vibe Coding** | ✅ Definition + framework | ✅ 100% covered (Karpathy source, UVAL antidote) - learning-with-ai.md:81 |
+| **70/80% Problem** | ✅ Framework (70%) | ✅ 90% covered (80% article evaluated 3/5) - ai-ecosystem.md:2024 |
+| **Context Engineering** | ✅ "RAM CPU" metaphor | ✅ 100% covered (Anthropic sources, patterns) - methodologies.md:192 |
+| **MCP** | ✅ "USB-C for AI" | ✅ 100% covered (506+ line architecture docs) - architecture.md:506 |
+| **Multi-Agent Orchestration** | ✅ Patterns | ✅ 100% covered (Gas Town, multiclaude, agent-chat) - ai-ecosystem.md:1412 |
+| **Plan Mode** | ✅ Plan first principle | ✅ 100% covered (comprehensive workflow) - ultimate-guide.md:2100 |
+| **TDD** | ✅ Mentioned | ✅ 100% covered (complete methodology + workflows) - methodologies.md |
+| **Spec-First** | ✅ Mini-PRD, Spec.md | ✅ 100% covered (Osmani spec article integrated 4/5) - workflows/spec-first.md |
+| **Production Safety** | ✅ Security, testing | ✅ 100% covered (550-line dedicated guide) - production-safety.md |
+| **Visual Context** | ✅ Screenshots for bugs | ✅ 80% covered (wireframing tools) - ultimate-guide.md:422 |
+| **Critique-Driven Dev** | ➕ **NEW** Framework | ❌ Not explicitly documented (conceptually via code review) |
+| **Few-Shot Prompting** | ➕ **NEW** Technique | ⚠️ Mentioned but not developed |
+| **Cost-Benefit Framework** | ➕ **NEW** Decision matrix | ❌ Not documented |
+| **"Context as RAM" metaphor** | ➕ Pedagogical framing | ⚠️ Concept present, metaphor absent |
+
+**Overlap quantified**: 10/14 topics = 100% covered, 2/14 = 80-90%, 2/14 = novel gaps
+
+---
+
+## Gap Analysis
+
+### Net-New Content (Potentially Valuable)
+
+| Gap | Priority | Action Recommended |
+|-----|----------|-------------------|
+| **Critique-Driven Development** | Medium | Research primary sources (Anthropic, research papers) instead of book |
+| **Few-Shot Prompting** | High | Document via Anthropic prompt engineering guides (open-access) |
+| **Cost-Benefit Framework** | Low | Interesting but needs research validation |
+| **"Context as RAM" metaphor** | Low | Add pedagogical note in methodologies.md:192 |
+
+### Already Documented (No Action Needed)
+
+- Vibe coding (Karpathy 2025 source)
+- 70/80% Problem (Osmani Substack article evaluated)
+- Context Engineering (Anthropic sources)
+- MCP architecture (comprehensive coverage)
+- Multi-agent orchestration (Gas Town, multiclaude, etc.)
+- TDD, Spec-First, Production Safety (complete guides)
+
+---
+
+## Cross-Validation with Existing Osmani Evaluations
+
+### Previous Evaluations
+
+1. **"How to write a good spec for AI agents"** (Jan 13, 2026)
+   - **Score**: 4/5 (High Value - Integrated)
+   - **Integration**: 4 sections added to workflows/spec-first.md (+180 lines)
+   - **Status**: ✅ COMPLETED (2026-02-01)
+
+2. **"The 80% Problem in Agentic Coding"** (Jan 28, 2026)
+   - **Score**: 3/5 (Pertinent - Minimal integration)
+   - **Integration**: 30 lines in ai-ecosystem.md:2024
+   - **Status**: ✅ COMPLETED
+
+### Book vs Articles Comparison
+
+| Source | Format | Score | Integration |
+|--------|--------|-------|-------------|
+| **Book** (Beyond Vibe Coding) | Paid, comprehensive | 3/5 | Minimal (tracking mention) |
+| **Article** (Good Spec) | Free blog | 4/5 | Full (180 lines) |
+| **Article** (80% Problem) | Free Substack | 3/5 | Minimal (30 lines) |
+
+**Pattern**: Book = consolidation of articles + expansion, but guide already integrated primary articles. Book adds pedagogical coherence but not new technical content beyond what articles provided.
+
+---
+
+## Integration Decision
+
+**Action**: **Minimal integration** (tracking mention + cross-ref citations)
+
+### Primary Integration: ai-ecosystem.md:2024
+
+**Add after "80% Problem" section** (3-5 lines):
+
+```markdown
+### Addy Osmani (Google Chrome DX Lead)
+
+**"The 80% Problem in Agentic Coding"** ([Substack](https://addyo.substack.com/p/the-80-problem-in-agentic-coding), Jan 28, 2026) — Synthesizes productivity paradox: AI generates 80% fast, final 20% requires human judgment. Introduces "comprehension debt" concept. See [detailed evaluation](../docs/resource-evaluations/024-addy-osmani-80-percent-problem.md).
+
+**"Beyond Vibe Coding"** (O'Reilly, 2025) — Comprehensive book expanding on 70% problem framework, context engineering, and AI-assisted workflows. Covers Claude Code, Cursor, Copilot. Significant overlap with this guide's methodologies (TDD, spec-first, context management). External reference for cross-validation. [Book site](https://beyond.addy.ie)
+```
+
+### Secondary: Cross-Reference Citations
+
+**Add brief notes in overlapping sections** (1-2 lines each, 4-5 locations):
+
+1. **methodologies.md:192** (Context Engineering):
+   ```markdown
+   > Also covered in: Osmani's "Beyond Vibe Coding" (O'Reilly, 2025) — uses "Context as RAM" metaphor for similar concepts.
+   ```
+
+2. **workflows/spec-first.md** (already references Osmani's spec article):
+   ```markdown
+   > Osmani's book "Beyond Vibe Coding" expands these spec-first principles across multiple AI coding tools.
+   ```
+
+3. **learning-with-ai.md:81** (Vibe Coding section):
+   ```markdown
+   > Term coined by Karpathy (2025). See also: Osmani's "Beyond Vibe Coding" (O'Reilly, 2025) for framework transitioning to production-ready practices.
+   ```
+
+4. **ai-ecosystem.md:1412** (Multi-Agent Orchestration):
+   ```markdown
+   > External references: Gas Town, multiclaude, agent-chat. See also: Osmani's "Beyond Vibe Coding" Ch. 4 (CLI Agents & Orchestrators).
+   ```
+
+**Total addition**: ~10-15 lines across 5 files
+
+---
+
+## Rationale for Minimal Integration
+
+### Why NOT Full Integration
+
+1. **Paid resource** — Guide is open-source, privilege free/open-access sources
+2. **90% overlap** — 10/14 topics already covered 100% with primary sources
+3. **2 Osmani articles already integrated**:
+   - Spec-First (4/5, 180 lines added)
+   - 80% Problem (3/5, 30 lines added)
+4. **Guide already more comprehensive** — 11K lines vs book's generalist approach (multi-tool coverage)
+5. **Book = consolidation** — Synthesis of existing articles + moderate expansion, not fundamentally new research
+
+### Why Tracking Mention IS Valuable
+
+1. **External validation** — O'Reilly publication = practitioner credibility for guide's patterns
+2. **Cross-reference utility** — Users familiar with book can map to guide sections
+3. **Ecosystem awareness** — Documents major resources in AI-assisted dev space
+4. **Pedagogical framing** — "Context as RAM", "MCP as USB-C" = memorable metaphors (note-worthy even if concepts covered)
+
+---
+
+## Risks of NOT Integrating
+
+**Low Impact**:
+1. No unique technical content lost (90% already documented)
+2. Gaps (Critique-Driven Dev, Few-Shot Prompting) better addressed via primary sources
+3. Book = synthesis, guide already has more detailed primary coverage
+
+**Medium Impact**:
+1. Missing external validation (O'Reilly = authority signal)
+2. Users familiar with book may not find cross-references
+3. Pedagogical metaphors ("Context as RAM") have teaching value
+
+**Decision**: Minimal integration (tracking mention + cross-refs) = preserves value without duplication
+
+---
+
+## New Gaps to Address (Separate from Book)
+
+Based on book analysis, these topics warrant research via **primary sources** (not book):
+
+| Topic | Action | Priority |
+|-------|--------|----------|
+| **Few-Shot Prompting** | Document via Anthropic prompt engineering guides | High |
+| **Critique-Driven Development** | Research if framework exists in Anthropic/research papers | Medium |
+| **Cost-Benefit Framework** | Validate if research-backed or just author opinion | Low |
+
+**Rationale**: Book identifies gaps, but guide should cite primary research (Anthropic, arXiv) not secondary synthesis (book).
+
+---
+
+## Fact-Check Results
+
+| Claim | Verified | Source/Notes |
+|-------|----------|--------------|
+| **Published O'Reilly** | ✅ | Perplexity search + Goodreads confirmed |
+| **Price $B0F6S5425Y** | ✅ | WebFetch beyond.addy.ie |
+| **Site beyond.addy.ie** | ✅ | WebFetch successful |
+| **70% Problem framework** | ✅ | WebFetch book + Perplexity |
+| **Podcast Gergely Orosz** | ✅ | Perplexity (Pragmatic Engineer, Oct 29, 2025) |
+| **Simon Willison blog** | ✅ | Perplexity (Sept 4, 2025, title change documented) |
+| **Context as RAM metaphor** | ✅ | WebFetch book content |
+| **MCP "USB-C for AI"** | ✅ | WebFetch book content |
+| **6 chapters structure** | ✅ | WebFetch table of contents |
+| **Multi-tool coverage** | ✅ | Claude Code, Cursor, Copilot confirmed in book |
+
+**Confidence**: High (all major claims verified via multiple sources)
+
+---
+
+## Decision
+
+**Final Score**: **3/5 (Pertinent - Minimal integration)**
+
+**Breakdown**:
+- **Content originality**: 2/5 (synthesis of articles + moderate expansion)
+- **Pedagogical value**: 4/5 (strong framing, memorable metaphors)
+- **Authority**: 5/5 (Osmani Google + O'Reilly)
+- **Accessibility**: 2/5 (paid vs open guide)
+- **Overlap**: 90% (10/14 topics 100% covered)
+- **Overall**: 3/5 (useful external reference, not integration target)
+
+**Action**: **MINIMAL INTEGRATION**
+- Tracking mention (3-5 lines in ai-ecosystem.md:2024)
+- Cross-ref citations (1-2 lines in 4-5 overlapping sections)
+- Total: ~10-15 lines across 5 files
+
+**Priority**: **Low** (opportunistic, next batch of updates)
+
+**Rationale**: Book = valuable external validation and pedagogical resource, but 90% content overlap + paid format + 2 Osmani articles already integrated = tracking mention sufficient. Guide already more comprehensive on Claude Code specifics. Cross-refs provide user navigation without duplication.
+
+---
+
+**Integration Status**: ⏳ **PENDING**
+**Files to Modify**:
+- ai-ecosystem.md (+3-5 lines)
+- methodologies.md (+1-2 lines)
+- workflows/spec-first.md (+1-2 lines)
+- learning-with-ai.md (+1-2 lines)
+- ai-ecosystem.md orchestration section (+1-2 lines)
diff --git a/docs/resource-evaluations/nick-tune-feedback-loops.md b/docs/resource-evaluations/nick-tune-feedback-loops.md
new file mode 100644
index 0000000..7706483
--- /dev/null
+++ b/docs/resource-evaluations/nick-tune-feedback-loops.md
@@ -0,0 +1,106 @@
+# Resource Evaluation: Nick Tune - Code Quality Feedback Loops
+
+**Evaluated**: 2026-02-01
+**Score**: 2/5 (Marginal)
+**Decision**: Do not integrate
+
+## Resource Details
+
+- **URL**: https://nick-tune.me/blog/2026-02-01-code-quality-feedback-loops/
+- **Author**: Nick Tune
+- **Date**: February 1, 2026
+- **Type**: Case study / practice guide
+
+## Summary
+
+Article describes a workflow using custom `/post-merge-reflection` command that:
+1. Gathers local reviews and GitHub PR feedback into markdown report
+2. Performs "5 whys" root cause analysis when issues slip through
+3. Implements multi-layered solutions (lint rules, dependency-cruiser, docs)
+4. Uses `--remaining-feedback-items` flag for batching feedback
+
+## Scoring Breakdown
+
+| Criterion | Score | Weight | Weighted | Justification |
+|-----------|-------|--------|----------|---------------|
+| Relevance | 3/5 | 25% | 0.75 | Directly related to code quality workflows |
+| Depth | 2/5 | 20% | 0.40 | Surface-level, no technical depth |
+| Novelty | 1/5 | 15% | 0.15 | 90% overlap with existing guide content |
+| Credibility | 2/5 | 15% | 0.30 | Unverified author, no external validation |
+| Actionability | 3/5 | 15% | 0.45 | Practical examples, but not comprehensive |
+| Evidence Quality | 1/5 | 10% | 0.10 | Zero quantified data or benchmarks |
+| **Total** | **2.15/5** | | **2.15** | **Marginal value** |
+
+## Overlap Analysis
+
+| Aspect | Resource | Guide Coverage | Overlap |
+|--------|----------|----------------|---------|
+| Pre-merge review loops | ❌ | ✅ `iterative-refinement.md:347-478` | N/A |
+| Post-merge reflection | ✅ Focus | ⚠️ `devops-sre.md:774+` (postmortem) | 90% |
+| 5 Whys root cause | ✅ | ✅ `ultimate-guide.md` | 100% |
+| Custom workflow tools | ✅ | ✅ Extensive examples/ | 80% |
+| Batching strategy | ✅ | ⚠️ Implicit in workflows | 70% |
+
+**Overall Overlap**: ~90% with existing content
+
+## Challenge Review
+
+**Agent**: technical-writer
+**Recommendation**: Downgrade to 2/5
+
+**Rationale**:
+- "Post-merge reflection" not truly novel - variant of existing postmortem patterns
+- Batching already documented implicitly in workflows
+- Source credibility unverified (author credentials not established)
+- High risk of content duplication if integrated
+
+## Fact-Check Results
+
+| Claim | Status | Source |
+|-------|--------|--------|
+| Author: Nick Tune | ✅ Verified | Article header |
+| Date: Feb 1, 2026 | ✅ Verified | Article header |
+| `/post-merge-reflection` command | ✅ Verified | Article text |
+| "5 whys" analysis | ✅ Verified | Exact quote found |
+| "2026 huge evolution" claim | ✅ Verified | Exact quote found |
+| Batching strategy | ✅ Verified | `--remaining-feedback-items` flag |
+| Quantified stats/benchmarks | ❌ Not found | None in article |
+
+**Factual accuracy**: Clean (no errors detected)
+
+## Final Decision
+
+**Action**: **Do not integrate**
+
+**Reasoning**:
+1. **High overlap** (90%) with existing documented patterns:
+   - Review loops: `iterative-refinement.md`
+   - Postmortems: `devops-sre.md`
+   - Root cause analysis: Already covered
+2. **Lack of validation**: No quantified data, benchmarks, or case study metrics
+3. **Recency bias**: Published today (Feb 1, 2026) - too early to assess community adoption
+4. **Integration risk**: Would create redundancy without adding substantial new value
+
+**Alternative considered**: Add 1-line mention in `devops-sre.md` → Rejected (not worth the clutter)
+
+## Future Reconsideration
+
+Monitor for:
+- Community adoption signals (GitHub stars, blog citations)
+- Quantified case studies with metrics
+- Author establishing credibility in AI-assisted development space
+
+**Timeline**: Reassess in 3 months (May 2026) if:
+- Article gains >50 citations or significant community discussion
+- Author publishes follow-up with quantified results
+- Pattern becomes widely adopted and referenced
+
+## Integration Plan (if score improves)
+
+*Reserved for future use if resource is re-evaluated with higher score*
+
+---
+
+**Evaluation completed**: 2026-02-01
+**Evaluator**: Claude (technical-writer agent)
+**Status**: Archived - No action required
diff --git a/guide/cheatsheet.md b/guide/cheatsheet.md
index a40ed66..5165791 100644
--- a/guide/cheatsheet.md
+++ b/guide/cheatsheet.md
@@ -6,7 +6,7 @@
 
 **Written with**: Claude (Anthropic)
 
-**Version**: 3.20.7 | **Last Updated**: January 2026
+**Version**: 3.20.8 | **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 3.20.7*
+*Last updated: January 2026 | Version 3.20.8*
diff --git a/guide/ultimate-guide.md b/guide/ultimate-guide.md
index 454b16e..bba9079 100644
--- a/guide/ultimate-guide.md
+++ b/guide/ultimate-guide.md
@@ -10,7 +10,7 @@
 
 **Last updated**: January 2026
 
-**Version**: 3.20.7
+**Version**: 3.20.8
 
 ---
 
@@ -16438,4 +16438,4 @@ We'll evaluate and add it to this section if it meets quality criteria.
 
 **Contributions**: Issues and PRs welcome.
 
-**Last updated**: January 2026 | **Version**: 3.20.7
+**Last updated**: January 2026 | **Version**: 3.20.8
diff --git a/machine-readable/reference.yaml b/machine-readable/reference.yaml
index be5a092..e26830a 100644
--- a/machine-readable/reference.yaml
+++ b/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)"