diff --git a/CHANGELOG.md b/CHANGELOG.md
index 387d58f..1369c3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,70 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+## [3.9.4] - 2026-01-19
+
+### Added
+
+- **Session Teleportation documentation** — New Section 9.16 in Ultimate Guide (~105 lines)
+  - Evolution timeline (2.0.24 → 2.1.0)
+  - Commands reference (`%`, `--teleport`, `/teleport`, `/tasks`, `/remote-env`, `Ctrl+B`)
+  - Prerequisites (GitHub App, clean git state, same account)
+  - Workflow example with step-by-step
+  - Environment support table (CLI, VS Code, Cursor, Web, iOS)
+  - Current limitations (research preview, unidirectional, GitHub only)
+  - Troubleshooting table
+  - Best practices
+  - Environment variables (`CLAUDE_CODE_DISABLE_BACKGROUND_TASKS`)
+- Updated Section 9 Recap with "Advanced Workflows" category
+- Updated `guide/cheatsheet.md` with teleportation commands
+  - Essential Commands: `/teleport`, `/tasks`, `/remote-env`
+  - Keyboard Shortcuts: `Ctrl+B`
+  - CLI Flags: `--teleport`
+- Updated `machine-readable/reference.yaml`
+  - New `session_teleportation` deep_dive entry
+  - Commands: `/teleport`, `/tasks`, `/remote-env`
+  - Shortcuts: `Ctrl+B`
+  - CLI: `--teleport`
+  - Line numbers updated for sections after 9.15
+
+## [3.9.3] - 2026-01-19
+
+### Added
+
+- **Claude Cowork documentation** — Complete guide for the new agentic desktop feature
+  - `guide/cowork.md` (NEW, ~460 lines) — Full documentation
+    - Architecture overview (local-first, sub-agents, no code execution)
+    - Comparison: Claude Code vs Cowork vs Projects
+    - 5 detailed use cases (file org, expenses, reports, travel, meetings)
+    - Security best practices (no official docs exist yet)
+    - Developer ↔ Non-Developer workflow patterns
+    - Known issues & troubleshooting
+    - Availability & roadmap
+  - `guide/ai-ecosystem.md` Section 9 (~90 lines) — Condensed integration guide
+    - Quick comparison table
+    - When to use what decision flow
+    - Security considerations summary
+    - Cross-reference to full guide
+  - `guide/ultimate-guide.md` — Cowork subsection in Section 11
+    - Comparison table and collaboration pattern
+    - Table of Contents updated
+  - `machine-readable/reference.yaml` — 8 new deep_dive entries for Cowork
+  - Updated `guide/README.md` navigation table
+  - Updated main `README.md` AI Ecosystem entry
+
+## [3.9.2] - 2026-01-19
+
+### Added
+
+- **Alternative Providers section** in `guide/ai-ecosystem.md` (~55 lines)
+  - Documents existence of community workarounds (ANTHROPIC_BASE_URL, etc.)
+  - Clear disclaimer: not tested, not recommended, not supported
+  - Reasons to avoid: feature degradation, ToS risks, no support
+  - Better alternatives table: Aider for local models, Continue.dev for multi-provider
+  - External reading pointers (no step-by-step instructions intentionally)
+  - Updated Table of Contents
+  - Added `ai_ecosystem_alternative_providers` reference in `reference.yaml`
+
 ## [3.9.1] - 2026-01-19
 
 ### Added
diff --git a/README.md b/README.md
index ef9dfd5..0d742d0 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,8 @@
 
 <p align="center">
   <a href="https://github.com/FlorianBruniaux/claude-code-ultimate-guide/stargazers"><img src="https://img.shields.io/github/stars/FlorianBruniaux/claude-code-ultimate-guide?style=for-the-badge" alt="Stars"/></a>
-  <a href="#"><img src="https://img.shields.io/badge/Lines-10,500+-blueviolet?style=for-the-badge" alt="Lines"/></a>
-  <a href="./examples/"><img src="https://img.shields.io/badge/Templates-63-green?style=for-the-badge" alt="Templates"/></a>
+  <a href="#"><img src="https://img.shields.io/badge/Lines-10,900+-blueviolet?style=for-the-badge" alt="Lines"/></a>
+  <a href="./examples/"><img src="https://img.shields.io/badge/Templates-61-green?style=for-the-badge" alt="Templates"/></a>
   <a href="./quiz/"><img src="https://img.shields.io/badge/Quiz-227_questions-orange?style=for-the-badge" alt="Quiz"/></a>
 </p>
 
@@ -185,7 +185,8 @@ curl -sL https://raw.githubusercontent.com/FlorianBruniaux/claude-code-ultimate-
 
 **What's inside**: Decision trees, command reference, context zones, MCP servers, agent templates, troubleshooting—optimized for machine consumption. Points to line numbers in the [full guide](./guide/ultimate-guide.md) for deep dives.
 
-### 🔬 Deep Audit (Personalized Recommendations)
+<details>
+<summary><strong>🔬 Deep Audit (Personalized Recommendations)</strong></summary>
 
 Get a comprehensive, **context-aware** audit that analyzes your project's README, CLAUDE.md files, and business domain to provide tailored recommendations:
 
@@ -242,6 +243,8 @@ Based on ALL this context, provide:
 
 **Want maximum depth?** Use [tools/audit-prompt.md](./tools/audit-prompt.md) (thinking is enabled by default with Opus 4.5)
 
+</details>
+
 ### 🧠 Knowledge Quiz
 
 Test your Claude Code knowledge with an interactive CLI quiz. **227 curated questions** covering all 14 guide sections, with immediate feedback and documentation links.
@@ -397,28 +400,11 @@ Weak Areas (< 75%):
 | **[Data Privacy](./guide/data-privacy.md)** | Data retention and privacy guide | ~10 minutes |
 | **[Security Hardening](./guide/security-hardening.md)** | MCP vetting, injection defense, CVEs | ~25 minutes |
 | **[Observability](./guide/observability.md)** | Session monitoring and cost tracking | ~15 minutes |
-| **[AI Ecosystem](./guide/ai-ecosystem.md)** | Complementary tools (Perplexity, Gemini, Kimi) | ~25 minutes |
+| **[AI Ecosystem](./guide/ai-ecosystem.md)** | Complementary tools (Perplexity, Gemini, Kimi, Cowork) | ~25 minutes |
 | **[LLM Reference](./machine-readable/reference.yaml)** | Machine-optimized index (~2K tokens) | For Claude/AI assistants |
 | **[Setup Audit](./tools/audit-prompt.md)** | Optimize your configuration | ~10 minutes |
 | **[Examples Library](./examples/)** | Production-ready templates | Browse as needed |
 
-### 🇫🇷 Whitepapers (French)
-
-8 standalone documents covering Claude Code from zero to production (~185 pages total):
-
-| # | Title | Audience | Pages |
-|---|-------|----------|-------|
-| **[#0](./whitepapers/00-introduction-serie.qmd)** | De Zéro à Productif | Everyone | ~8 |
-| **[#1](./whitepapers/01-prompts-efficaces.qmd)** | Prompts qui Marchent | Dev Junior/Senior | ~12 |
-| **[#2](./whitepapers/02-personnalisation.qmd)** | Personnaliser Claude | Senior/Power | ~15 |
-| **[#3](./whitepapers/03-securite.qmd)** | Sécurité en Production | DevSecOps/TechLead | ~15 |
-| **[#4](./whitepapers/04-architecture.qmd)** | L'Architecture Démystifiée | Architects | ~12 |
-| **[#5](./whitepapers/05-equipe.qmd)** | Déployer en Équipe | TechLead/PM | ~12 |
-| **[#6](./whitepapers/06-privacy.qmd)** | Privacy & Compliance | Compliance/Legal | ~10 |
-| **[#7](./whitepapers/07-guide-reference.qmd)** | Guide de Référence Complet | Everyone | ~100 |
-
-> **Reading paths by profile**: Junior (WP #0→#1, 25 min) | Senior (#0→#1→#2→#3, 1h15) | Tech Lead (#0→#5→#3→#2, 1h15)
-
 <details>
 <summary><strong>Alternative Formats</strong> (Interactive AI, PDFs)</summary>
 
@@ -433,7 +419,7 @@ Weak Areas (< 75%):
 ```
 claude-code-ultimate-guide/
 ├── guide/                    # 📖 Core documentation
-│   ├── ultimate-guide.md     # Complete reference (~10300 lines)
+│   ├── ultimate-guide.md     # Complete reference (~10900 lines)
 │   ├── cheatsheet.md         # 1-page printable reference
 │   ├── architecture.md       # How Claude Code works internally
 │   ├── adoption-approaches.md # Team implementation strategies
@@ -469,15 +455,10 @@ claude-code-ultimate-guide/
 │   ├── github-actions/       # CI/CD workflows
 │   ├── config/               # Configuration templates
 │   ├── memory/               # CLAUDE.md templates
+│   ├── mcp-configs/          # MCP server configurations
 │   ├── modes/                # Behavioral modes (SuperClaude)
 │   └── workflows/            # Advanced workflow guides
 │
-├── whitepapers/              # 🇫🇷 French whitepaper series (8 docs, ~185 pages)
-│   ├── 00-introduction-serie.qmd
-│   ├── 01-prompts-efficaces.qmd
-│   ├── ...
-│   └── 07-guide-reference.qmd
-│
 └── quiz/                     # 🧠 Interactive knowledge quiz (227 questions)
 ```
 
@@ -487,7 +468,8 @@ claude-code-ultimate-guide/
 
 Copy-paste templates from [`examples/`](./examples/) for immediate use:
 
-### Slash Commands
+<details>
+<summary><strong>Slash Commands</strong> (15 commands)</summary>
 
 | Command | Purpose | Highlights |
 |---------|---------|------------|
@@ -507,6 +489,8 @@ Copy-paste templates from [`examples/`](./examples/) for immediate use:
 | [/optimize](./examples/commands/optimize.md) | Performance analysis | Runtime, memory, bundle |
 | [/ship](./examples/commands/ship.md) | Pre-deploy checklist | Tests, security, migrations |
 
+</details>
+
 ### Utility Scripts
 
 | Script | Purpose | Performance |
@@ -515,7 +499,8 @@ Copy-paste templates from [`examples/`](./examples/) for immediate use:
 | [audit-scan.sh](./examples/scripts/audit-scan.sh) | Setup audit scanner | ~2s |
 | [update-cc-releases.sh](./scripts/update-cc-releases.sh) | Check for new Claude Code releases | ~1s |
 
-### Security & Automation Hooks
+<details>
+<summary><strong>Security & Automation Hooks</strong> (8 highlighted, 15 total)</summary>
 
 | Hook | Event | Purpose |
 |------|-------|---------|
@@ -528,7 +513,9 @@ Copy-paste templates from [`examples/`](./examples/) for immediate use:
 | [notification.sh](./examples/hooks/bash/notification.sh) | Notification | macOS sound alerts |
 | [auto-format.sh](./examples/hooks/bash/auto-format.sh) | PostToolUse | Auto-format with Prettier |
 
-**[See All 14 Hooks](./examples/hooks/)** — Includes session-logger, security-check, claudemd-scanner, and more
+**[See All 15 Hooks](./examples/hooks/)** — Includes session-logger, security-check, claudemd-scanner, and more
+
+</details>
 
 ### GitHub Actions (CI/CD)
 
@@ -630,7 +617,8 @@ Found an error? Have a suggestion? See [CONTRIBUTING.md](./CONTRIBUTING.md) for
 
 ---
 
-## 📚 Related Resources
+<details>
+<summary><strong>📚 Related Resources</strong></summary>
 
 ### Complementary Guides
 
@@ -655,6 +643,8 @@ Found an error? Have a suggestion? See [CONTRIBUTING.md](./CONTRIBUTING.md) for
 
 - [Claude Code Docs](https://docs.anthropic.com/en/docs/claude-code) — Anthropic official reference
 
+</details>
+
 ---
 
 ## 🌐 Ecosystem & Positioning
@@ -743,7 +733,7 @@ Get notified about major updates, new templates, and Claude Code best practices:
 
 ---
 
-*Version 3.9.1 | January 2026 | Crafted with Claude*
+*Version 3.9.4 | January 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 6bd1074..e0d61b5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.9.1
+3.9.4
diff --git a/guide/README.md b/guide/README.md
index 5a13958..3aa9a71 100644
--- a/guide/README.md
+++ b/guide/README.md
@@ -17,6 +17,7 @@ Core documentation for mastering Claude Code.
 | [methodologies.md](./methodologies.md) | 15 development methodologies reference (TDD, SDD, BDD, etc.) | 20 min |
 | [security-hardening.md](./security-hardening.md) | Security threats, MCP vetting, injection defense | 25 min |
 | [ai-ecosystem.md](./ai-ecosystem.md) | Complementary AI tools (Perplexity, Gemini, Kimi, NotebookLM) | 25 min |
+| [cowork.md](./cowork.md) | Claude Cowork: Agentic Desktop for Knowledge Workers | 15 min |
 | [workflows/](./workflows/) | Practical workflow guides for Claude Code | 30 min |
 
 ### Workflows
diff --git a/guide/ai-ecosystem.md b/guide/ai-ecosystem.md
index 7d28c8b..3850869 100644
--- a/guide/ai-ecosystem.md
+++ b/guide/ai-ecosystem.md
@@ -17,7 +17,9 @@
 - [6. UI Prototypers (v0, Bolt, Lovable)](#6-ui-prototypers-v0-bolt-lovable)
 - [7. Workflow Orchestration](#7-workflow-orchestration)
 - [8. Cost & Subscription Strategy](#8-cost--subscription-strategy)
-- [Ready-to-Use Prompts](#appendix-ready-to-use-prompts)
+- [9. Claude Cowork (Research Preview)](#9-claude-cowork-research-preview)
+- [Appendix: Ready-to-Use Prompts](#appendix-ready-to-use-prompts)
+- [Alternative Providers (Community Workarounds)](#alternative-providers-community-workarounds)
 
 ---
 
@@ -696,6 +698,96 @@ claude
 
 ---
 
+## 9. Claude Cowork (Research Preview)
+
+> **Research Preview** (January 2026) — Limited documentation, expect bugs, local-only access. No production use recommended yet.
+
+Cowork extends Claude's agentic capabilities to non-technical users via the Claude Desktop app. Instead of terminal commands, it accesses local folders to manipulate files.
+
+**Official source**: [claude.com/blog/cowork-research-preview](https://claude.com/blog/cowork-research-preview)
+
+### Quick Comparison
+
+| Aspect | Claude Code | Cowork | Projects |
+|--------|-------------|--------|----------|
+| **Target** | Developers | Knowledge workers | Everyone |
+| **Interface** | Terminal/CLI | Desktop app | Chat |
+| **Access** | Shell + code | Folder sandbox | Documents |
+| **Execute code** | Yes | **No** | No |
+| **Outputs** | Code, scripts | Excel, PPT, docs | Conversations |
+| **Maturity** | Production | **Preview** | Production |
+| **Connectors** | MCP servers | **Local only** | Integrations |
+| **Platform** | All | macOS only | All |
+| **Subscription** | Usage-based | Max only (~$200/mo) | All tiers |
+
+### When to Use What
+
+```
+Need code execution?        → Claude Code
+File/doc manipulation?      → Cowork (if local files)
+Cloud files/collaboration?  → Wait (no connectors yet)
+Ideation/planning?          → Projects
+```
+
+### Key Use Cases
+
+| Use Case | Input | Output |
+|----------|-------|--------|
+| **File organization** | Messy Downloads folder | Structured folders by type/date |
+| **Expense tracking** | Receipt screenshots | Excel with formulas + totals |
+| **Report synthesis** | Scattered notes + PDFs | Formatted Word/PDF document |
+| **Meeting prep** | Company docs + LinkedIn | Briefing document |
+
+### Security Considerations
+
+> **No official security documentation exists yet.**
+
+**Best practices**:
+1. Create dedicated `~/Cowork-Workspace/` folder — never grant access to Documents/Desktop
+2. Review task plans before execution (especially file deletions/moves)
+3. Avoid files with instruction-like text from unknown sources
+4. No credentials, API keys, or sensitive data in workspace
+5. Backup before destructive operations
+
+**Risk matrix**:
+| Risk | Level | Mitigation |
+|------|-------|------------|
+| Prompt injection via files | HIGH | Dedicated folder, no untrusted content |
+| Browser action abuse | HIGH | Review each web action |
+| Local file exposure | MEDIUM | Minimal permission scope |
+
+### Developer ↔ Non-Developer Workflows
+
+**Pattern**: Dev specs in Claude Code → PM review in Cowork
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│ DEVELOPER (Claude Code)                                      │
+│ > "Generate a technical spec. Output to ~/Shared/specs/"    │
+└──────────────────────────────┬──────────────────────────────┘
+                               ↓
+┌─────────────────────────────────────────────────────────────┐
+│ PROJECT MANAGER (Cowork)                                     │
+│ > "Create stakeholder summary from ~/Shared/specs/.         │
+│    Output as Word doc with timeline and risks."             │
+└─────────────────────────────────────────────────────────────┘
+```
+
+Shared context via `~/Shared/CLAUDE.md` file.
+
+### Availability
+
+| Aspect | Status |
+|--------|--------|
+| Subscription | Max only (~$200/month) |
+| Platform | macOS only (Windows/Linux announced) |
+| Waitlist | Available for Pro/Team plans |
+| Stability | Research preview |
+
+> **Deep Dive**: For complete security practices, troubleshooting, and detailed use cases, see [guide/cowork.md](./cowork.md).
+
+---
+
 ## Appendix: Ready-to-Use Prompts
 
 ### Perplexity: Technical Spec Research
@@ -806,4 +898,61 @@ Docs → Understanding: NotebookLM → Claude Code
 
 ---
 
+## Alternative Providers (Community Workarounds)
+
+> ⚠️ **Disclaimer**: This section documents techniques that exist in the community
+> for **completeness only**. These methods are:
+> - **Not tested** by the guide author
+> - **Not recommended** for production use
+> - **Not supported** by Anthropic
+> - Subject to **ToS restrictions** from various providers
+>
+> **Our recommendation**: Use Claude Code with Claude models as intended,
+> or use tools designed for multi-provider support (Aider, Continue.dev).
+
+### What Exists
+
+Claude Code reads `ANTHROPIC_BASE_URL` from environment variables, following
+Anthropic SDK conventions. This is intended for enterprise gateways but can
+technically point to any Anthropic-compatible API proxy.
+
+### Known Environment Variables
+
+| Variable | Purpose | Status |
+|----------|---------|--------|
+| `ANTHROPIC_BASE_URL` | API endpoint override | Undocumented for CC |
+| `ANTHROPIC_MODEL` | Default model name | Semi-documented |
+| `ANTHROPIC_AUTH_TOKEN` | API authentication | Official |
+
+### Why We Recommend Against This
+
+1. **Feature degradation**: WebSearch, MCP, extended thinking modes are
+   optimized for Claude and degrade with other models
+2. **ToS risks**: Reverse-engineering proxies (e.g., for GitHub Copilot)
+   explicitly violate provider terms
+3. **No support**: Anthropic cannot help debug non-Claude setups
+4. **Maintenance burden**: Proxies break when providers change APIs
+5. **Misleading outputs**: Non-Claude responses may not match expected behavior
+
+### Better Alternatives
+
+If you need local models or multi-provider flexibility:
+
+| Need | Recommended Tool |
+|------|------------------|
+| Local models (Ollama, vLLM) | [Aider](https://aider.chat) |
+| Multi-provider IDE | [Continue.dev](https://continue.dev) |
+| Claude + local flexibility | Aider (supports both) |
+
+### Further Reading (External)
+
+For those who understand the risks and want to explore anyway:
+- Community discussions on r/LocalLLaMA
+- LiteLLM documentation for proxy setups
+- GitHub search: "claude-code proxy"
+
+*We intentionally do not provide step-by-step instructions.*
+
+---
+
 *Back to [Ultimate Guide](./ultimate-guide.md#11-ai-ecosystem-complementary-tools) | [Main README](../README.md)*
diff --git a/guide/cheatsheet.md b/guide/cheatsheet.md
index f3cf915..38c61c3 100644
--- a/guide/cheatsheet.md
+++ b/guide/cheatsheet.md
@@ -6,7 +6,7 @@
 
 **Written with**: Claude (Anthropic)
 
-**Version**: 3.9.1 | **Last Updated**: January 2026
+**Version**: 3.9.4 | **Last Updated**: January 2026
 
 ---
 
@@ -22,6 +22,9 @@
 | `/plan` | Enter Plan Mode (no changes) |
 | `/execute` | Exit Plan Mode (apply changes) |
 | `/model` | Switch model (sonnet/opus/opusplan) |
+| `/teleport` | Teleport session from web |
+| `/tasks` | Monitor background tasks |
+| `/remote-env` | Configure cloud environment |
 | `/exit` | Quit (or Ctrl+D) |
 
 ---
@@ -37,6 +40,7 @@
 | `Ctrl+L` | Clear screen (keeps context) |
 | `Tab` | Autocomplete |
 | `Shift+Enter` | New line |
+| `Ctrl+B` | Background tasks |
 | `Ctrl+D` | Exit |
 
 ---
@@ -283,6 +287,7 @@ VERIFY: Empty email shows error, invalid format shows error
 | `-p "query"` | Non-interactive mode (CI/CD) |
 | `-c` / `--continue` | Continue last session |
 | `-r` / `--resume <id>` | Resume specific session |
+| `--teleport` | Teleport session from web |
 | `--model sonnet` | Change model |
 | `--add-dir ../lib` | Allow access outside CWD |
 | `--permission-mode plan` | Plan mode |
@@ -397,4 +402,4 @@ 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 3.9.1*
+*Last updated: January 2026 | Version 3.9.4*
diff --git a/guide/cowork.md b/guide/cowork.md
new file mode 100644
index 0000000..1378a6c
--- /dev/null
+++ b/guide/cowork.md
@@ -0,0 +1,462 @@
+# Claude Cowork: Agentic Desktop for Knowledge Work
+
+> **Reading time**: ~15 minutes
+>
+> **Purpose**: Understand Cowork's capabilities, limitations, and how it complements Claude Code for team workflows.
+
+---
+
+> **Research Preview** (January 2026) — Limited documentation available.
+> Expect bugs, no production use recommended yet.
+
+---
+
+## Table of Contents
+
+- [1. Overview](#1-overview)
+- [2. Who Should Use Cowork?](#2-who-should-use-cowork)
+- [3. Architecture](#3-architecture)
+- [4. Claude Code vs Cowork vs Projects](#4-claude-code-vs-cowork-vs-projects)
+- [5. Use Cases](#5-use-cases)
+- [6. Security: Handle With Care](#6-security-handle-with-care)
+- [7. Known Issues & Troubleshooting](#7-known-issues--troubleshooting)
+- [8. Developer ↔ Non-Developer Workflows](#8-developer--non-developer-workflows)
+- [9. Availability & Roadmap](#9-availability--roadmap)
+- [Sources](#sources)
+
+---
+
+## 1. Overview
+
+**Cowork** is Claude's agentic desktop feature that extends Claude's autonomous capabilities to non-technical users through the Claude Desktop app. Instead of terminal commands, Cowork accesses local folders and files directly.
+
+### What is Cowork?
+
+- **Research preview** released January 2026 for Max subscribers (macOS only)
+- Extends Claude Code's agentic architecture to knowledge workers
+- ~90% of Cowork was written by Claude itself ([Anthropic blog])
+- Focuses on file manipulation, organization, and document generation
+
+### Relationship to Claude Code
+
+Cowork shares the same backend architecture as Claude Code:
+- Same model capabilities (extended thinking, agentic loops)
+- Same limitations (no internet access without explicit tools)
+- Different interface: Desktop app vs Terminal
+
+**Key difference**: Cowork cannot execute arbitrary code—it manipulates files only.
+
+---
+
+## 2. Who Should Use Cowork?
+
+### Good Fit
+
+| Persona | Use Case | Why Cowork |
+|---------|----------|------------|
+| **Project Manager** | File organization + status reports | Multi-step automation without coding |
+| **Data Analyst** | Local CSV/Excel → formatted reports | Native Excel formulas output |
+| **Writer/Editor** | Research notes → structured documents | Synthesis across many sources |
+| **Operations** | Receipt screenshots → expense reports | Multi-format input processing |
+
+### Poor Fit (For Now)
+
+| Persona | Limitation | Alternative |
+|---------|------------|-------------|
+| **Security-conscious enterprises** | No audit trail, no access controls | Wait for enterprise features |
+| **Heavy cloud users** | No Google Drive/Dropbox confirmed | Use native apps |
+| **Anyone needing reliability** | Preview = bugs, unexpected behavior | Wait for stable release |
+| **Code execution needs** | Files only, no scripts | Use Claude Code |
+
+---
+
+## 3. Architecture
+
+### Local-First Design
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                    CLAUDE DESKTOP APP                        │
+│  ┌─────────────────────────────────────────────────────────┐│
+│  │                     COWORK                               ││
+│  │  ┌─────────────┐  ┌─────────────┐  ┌─────────────────┐ ││
+│  │  │ Sub-Agent 1 │  │ Sub-Agent 2 │  │ Sub-Agent 3     │ ││
+│  │  │ (Analysis)  │  │ (Transform) │  │ (Organize)      │ ││
+│  │  └──────┬──────┘  └──────┬──────┘  └───────┬─────────┘ ││
+│  │         └────────────────┴─────────────────┘            ││
+│  │                          ↓                               ││
+│  │  ┌─────────────────────────────────────────────────────┐││
+│  │  │              LOCAL FOLDER SANDBOX                    │││
+│  │  │  ~/Cowork-Workspace/                                 │││
+│  │  │    ├── input/  (your files)                         │││
+│  │  │    └── output/ (generated files)                    │││
+│  │  └─────────────────────────────────────────────────────┘││
+│  └─────────────────────────────────────────────────────────┘│
+│                                                              │
+│  ┌─────────────────┐                                        │
+│  │ CHROME INTEGRATION │ ← Web tasks (with explicit action)  │
+│  └─────────────────┘                                        │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### Key Technical Details
+
+| Aspect | Details |
+|--------|---------|
+| **Access model** | Local folder sandbox (user grants permission) |
+| **Cloud connectors** | Not confirmed (no Drive, Dropbox, etc. yet) |
+| **Sub-agents** | Parallel execution with fresh context per agent |
+| **Code execution** | **None** - Files only (no scripts, no commands) |
+| **Browser** | Chrome integration for web research tasks |
+| **Context limit** | ~200K tokens (~150-500 pages per session) |
+| **Output formats** | Excel (.xlsx with formulas), PowerPoint, Word, PDF, text |
+
+### What Cowork Cannot Do
+
+- Execute shell commands or scripts
+- Access cloud storage directly (as of Jan 2026)
+- Run code in any language
+- Access network resources without Chrome
+- Persist memory across sessions (except via files)
+
+---
+
+## 4. Claude Code vs Cowork vs Projects
+
+| Aspect | Claude Code | Cowork | Projects |
+|--------|-------------|--------|----------|
+| **Target user** | Developers | Knowledge workers | Everyone |
+| **Interface** | Terminal/CLI | Desktop app | Chat interface |
+| **Access** | Shell + arbitrary code | Folder sandbox only | Documents only |
+| **Execute code** | Yes (full shell) | No | No |
+| **Outputs** | Code, scripts, any file | Excel, PPT, docs | Conversations |
+| **Maturity** | Production-ready | **Research preview** | Production-ready |
+| **Security docs** | Extensive | None yet | Standard |
+| **Context** | ~200K tokens | ~200K tokens | Project-scoped |
+| **Memory** | CLAUDE.md files | Via files | Project knowledge |
+| **Subscription** | Usage-based | Max only (~$200/mo) | All tiers |
+| **Platform** | macOS, Linux, Windows | macOS only | All |
+
+### Decision Flow
+
+```
+Need to execute code or scripts?
+├─ Yes → Claude Code
+└─ No → Need file manipulation?
+         ├─ Yes (local files) → Cowork
+         ├─ Yes (cloud files) → Wait or use native apps
+         └─ No (just conversation) → Projects
+```
+
+---
+
+## 5. Use Cases
+
+### 5.1 File Organization
+
+**Scenario**: Messy Downloads folder with 500+ files
+
+```
+INPUT:  ~/Downloads/ (mixed PDFs, images, zips, docs)
+PROMPT: "Organize my Downloads folder. Create folders by type
+        and date. Move files, don't copy. Show me the summary."
+OUTPUT: Organized structure + summary.txt
+```
+
+**Source**: [YouTube demo - File Organization]
+
+### 5.2 Expense Tracking
+
+**Scenario**: Receipt screenshots → Excel report
+
+```
+INPUT:  ~/Receipts/ (20 JPG/PNG receipt photos)
+PROMPT: "Extract expenses from these receipts.
+        Create an Excel file with Date, Vendor, Amount, Category.
+        Add a summary sheet with totals by category."
+OUTPUT: expenses.xlsx with formulas + summary sheet
+```
+
+**Source**: [LinkedIn post - Expense tracking demo]
+
+### 5.3 Report Synthesis
+
+**Scenario**: Scattered notes → structured document
+
+```
+INPUT:  ~/Notes/ (15 markdown files, 3 PDFs)
+PROMPT: "Create a project status report from these notes.
+        Structure: Executive Summary, Progress by Area, Risks,
+        Next Steps. Format as Word doc."
+OUTPUT: status-report.docx
+```
+
+**Source**: [Anthropic blog]
+
+### 5.4 Travel Planning
+
+**Scenario**: Multi-source research → itinerary
+
+```
+INPUT:  ~/Trip/ (saved webpages, flight confirmations, Airbnb PDFs)
+PROMPT: "Create a day-by-day itinerary for my Tokyo trip.
+        Include all confirmations, local recommendations,
+        and a packing checklist."
+OUTPUT: tokyo-itinerary.docx + checklist.xlsx
+```
+
+**Source**: [YouTube tutorial - Travel planning with Cowork]
+
+### 5.5 Meeting Preparation
+
+**Scenario**: Multiple docs → briefing document
+
+```
+INPUT:  ~/Meeting/ (company report PDF, LinkedIn profiles, news articles)
+PROMPT: "Create a briefing doc for my meeting with Acme Corp.
+        Include: company overview, key people, recent news,
+        talking points, questions to ask."
+OUTPUT: acme-briefing.docx
+```
+
+---
+
+## 6. Security: Handle With Care
+
+> **No official security documentation exists for Cowork yet.**
+> The following is community-derived best practice.
+
+### Risk Matrix
+
+| Risk | Severity | Description | Mitigation |
+|------|----------|-------------|------------|
+| **Prompt injection via files** | HIGH | Malicious files with embedded instructions | Use dedicated folder, no untrusted content |
+| **Browser action abuse** | HIGH | Cowork taking unintended web actions | Review each web action before approval |
+| **Local file exposure** | MEDIUM | Accidental access to sensitive folders | Minimal permission scope |
+| **Data exfiltration** | MEDIUM | Sensitive data leaving local system | No credentials in workspace |
+| **Incomplete operations** | LOW | Half-finished file operations | Backup before destructive ops |
+
+### Security Best Practices
+
+1. **Create a dedicated Cowork folder**
+   ```
+   ~/Cowork-Workspace/
+   ├── input/    # Files you want processed
+   └── output/   # Generated files
+   ```
+   Never grant access to Documents, Desktop, or home folder directly.
+
+2. **Review task plans before execution**
+   - Cowork shows its plan before acting
+   - Read each step, especially file deletions or moves
+   - Reject and refine if scope seems wrong
+
+3. **Avoid instruction-like content in files**
+   - Don't process files containing "ignore previous instructions..."
+   - Be cautious with files from unknown sources
+   - Especially PDFs and documents with embedded text
+
+4. **No sensitive data in workspace**
+   - No API keys, passwords, tokens
+   - No personal financial documents
+   - No confidential work documents
+   - No credentials in any format
+
+5. **Backup before destructive operations**
+   - Before "organize my folder" → backup first
+   - Before "rename all files" → backup first
+   - Use Time Machine or manual copy
+
+6. **Browser permission caution**
+   - Grant Chrome access only when needed
+   - Review each web action Cowork proposes
+   - Revoke access after task completion
+
+### What NOT to Do
+
+```
+DANGEROUS: "You have access to my Documents folder"
+DANGEROUS: "Process all files in ~/"
+DANGEROUS: "Here's my password file, extract credentials"
+DANGEROUS: "Process this PDF from an unknown sender"
+RISKY:     "Delete all duplicates" (without backup)
+RISKY:     "Reorganize everything" (scope too broad)
+```
+
+---
+
+## 7. Known Issues & Troubleshooting
+
+> Based on community reports (January 2026)
+
+### Common Issues
+
+| Issue | Description | Workaround |
+|-------|-------------|------------|
+| **Incomplete tasks** | Cowork stops mid-operation | Break into smaller, explicit steps |
+| **Node.js download prompts** | Unexpected download dialogs | Accept or cancel, report to Anthropic |
+| **Session timeouts** | Long tasks getting interrupted | Keep app active, smaller batches |
+| **Browser actions failing** | Chrome integration not working | Grant explicit permissions in System Preferences |
+| **Excel formula errors** | Generated formulas don't work | Verify regional settings (comma vs semicolon) |
+| **File permission errors** | "Cannot access folder" | Re-grant permissions in Desktop app settings |
+
+### Reporting Issues
+
+Since this is a research preview, feedback is valuable:
+- **General support**: support.anthropic.com
+- **Feature requests**: Through the Claude Desktop app feedback
+- **Community discussion**: Reddit r/ClaudeAI
+
+### Recovery Procedures
+
+**If Cowork stops mid-task:**
+```
+1. Check ~/Cowork-Workspace/output/ for partial results
+2. Review what was completed vs planned
+3. Restart with explicit next step
+4. "Continue from where you stopped: [describe state]"
+```
+
+**If files are in unexpected state:**
+```
+1. Don't let Cowork "fix" without understanding
+2. Review manually what changed
+3. Restore from backup if needed
+4. Restart with clearer instructions
+```
+
+---
+
+## 8. Developer ↔ Non-Developer Workflows
+
+One of Cowork's strengths is enabling collaboration between technical and non-technical team members.
+
+### Pattern 1: Dev Specs → PM Review
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│ DEVELOPER (Claude Code)                                      │
+│                                                              │
+│ > "Generate a technical spec for the new auth system.       │
+│    Output as markdown in ~/Shared/specs/"                   │
+│                                                              │
+│ Output: ~/Shared/specs/auth-spec.md                         │
+└──────────────────────────────┬──────────────────────────────┘
+                               ↓
+┌─────────────────────────────────────────────────────────────┐
+│ PROJECT MANAGER (Cowork)                                     │
+│                                                              │
+│ > "Review the auth spec in ~/Shared/specs/.                 │
+│    Create a stakeholder summary with timeline estimates     │
+│    and risk assessment. Output as Word doc."                │
+│                                                              │
+│ Output: ~/Shared/docs/auth-summary.docx                     │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### Pattern 2: Research → Implementation
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│ ANALYST (Cowork)                                             │
+│                                                              │
+│ > "Research competitors' pricing pages. Save screenshots     │
+│    and create a comparison matrix in Excel."                │
+│                                                              │
+│ Output: ~/Shared/research/pricing-comparison.xlsx            │
+└──────────────────────────────┬──────────────────────────────┘
+                               ↓
+┌─────────────────────────────────────────────────────────────┐
+│ DEVELOPER (Claude Code)                                      │
+│                                                              │
+│ > "Implement a pricing page based on the competitive        │
+│    analysis in ~/Shared/research/. Use our design system."  │
+│                                                              │
+│ Output: src/pages/pricing.tsx (+ tests)                     │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### Pattern 3: Shared Context via CLAUDE.md
+
+For teams using both tools, create a shared context file:
+
+```markdown
+# ~/Shared/CLAUDE.md
+
+## Project: Acme Platform v2
+
+### Conventions
+- All specs in ~/Shared/specs/
+- All docs in ~/Shared/docs/
+- All research in ~/Shared/research/
+
+### Current Sprint
+- Auth system redesign
+- Pricing page implementation
+- Q1 stakeholder report
+
+### Key Decisions
+- Using Clerk for auth (see specs/auth-decision.md)
+- Tailwind for styling
+- Q1 deadline: March 15
+```
+
+Both Claude Code and Cowork can reference this file for context.
+
+---
+
+## 9. Availability & Roadmap
+
+### Current Status (January 2026)
+
+| Aspect | Status |
+|--------|--------|
+| **Subscription** | Max only (~$200/month) |
+| **Platform** | macOS only |
+| **Waitlist** | Available for Pro/Team plans |
+| **Stability** | Research preview (expect bugs) |
+
+### Expected Future
+
+| Feature | Status | Notes |
+|---------|--------|-------|
+| Windows support | Announced | No date |
+| Linux support | Announced | No date |
+| Cloud connectors | Unknown | Not confirmed |
+| Pro plan access | Waitlisted | Expected 2026 |
+| Enterprise features | Unknown | Audit trail, SSO, etc. |
+
+### How to Get Access
+
+1. **Max subscribers**: Enable in Claude Desktop app settings
+2. **Pro/Team subscribers**: Join waitlist at claude.ai/cowork
+3. **Enterprise**: Contact Anthropic sales
+
+---
+
+## Sources
+
+All information in this document is derived from:
+
+| Source | Type | Link |
+|--------|------|------|
+| **Anthropic Blog** | Official | [claude.com/blog/cowork-research-preview](https://claude.com/blog/cowork-research-preview) |
+| **YouTube Demo - File Org** | Community | Search "Claude Cowork file organization" |
+| **LinkedIn Demos** | Community | Various posts tagged #ClaudeCowork |
+| **Reddit r/ClaudeAI** | Community | Cowork megathread |
+
+### Documentation Gaps
+
+As of January 2026, the following official documentation is **missing**:
+- Security guidelines
+- Best practices guide
+- API/automation documentation
+- Known issues list
+- Release notes / changelog
+- Enterprise deployment guide
+
+This guide will be updated as official documentation becomes available.
+
+---
+
+*Back to [AI Ecosystem Guide](./ai-ecosystem.md) | [Ultimate Guide](./ultimate-guide.md) | [Main README](../README.md)*
diff --git a/guide/ultimate-guide.md b/guide/ultimate-guide.md
index 6a4bcec..1714bba 100644
--- a/guide/ultimate-guide.md
+++ b/guide/ultimate-guide.md
@@ -10,7 +10,7 @@
 
 **Last updated**: January 2026
 
-**Version**: 3.9.1
+**Version**: 3.9.4
 
 ---
 
@@ -174,6 +174,7 @@ Context full → /compact or /clear
   - [11.2 Tool Matrix](#112-tool-matrix)
   - [11.3 Practical Workflows](#113-practical-workflows)
   - [11.4 Integration Patterns](#114-integration-patterns)
+  - [For Non-Developers: Claude Cowork](#for-non-developers-claude-cowork)
 - [Appendix: Templates Collection](#appendix-templates-collection)
   - [Appendix A: File Locations Reference](#appendix-a-file-locations-reference)
 
@@ -9219,6 +9220,111 @@ Add the logout button only. Don't add session management or remember-me features
 
 ---
 
+## 9.16 Session Teleportation
+
+**Reading time**: 5 minutes
+**Skill level**: Week 2+
+**Status**: Research Preview (as of January 2026)
+
+Session teleportation allows migrating coding sessions between cloud (claude.ai/code) and local (CLI) environments. This enables workflows where you start work on mobile/web and continue locally with full filesystem access.
+
+### Evolution Timeline
+
+| Version | Feature |
+|---------|---------|
+| **2.0.24** | Initial Web → CLI teleport capability |
+| **2.0.41** | Teleporting auto-sets upstream branch |
+| **2.0.45** | `&` prefix for background tasks to web |
+| **2.1.0** | `/teleport` and `/remote-env` commands |
+
+### Commands Reference
+
+| Command | Usage |
+|---------|-------|
+| `%` or `&` prefix | Send task to cloud (e.g., `% Fix the auth bug`) |
+| `claude --teleport` | Interactive picker for available sessions |
+| `claude --teleport <id>` | Teleport specific session by ID |
+| `/teleport` | In-REPL command to teleport current session |
+| `/tasks` | Monitor background tasks status |
+| `/remote-env` | Configure cloud environment settings |
+| `Ctrl+B` | Background all running tasks (unified in 2.1.0) |
+
+### Prerequisites
+
+**Required for teleportation:**
+- GitHub account connected + Claude GitHub App installed
+- Clean git state (0 uncommitted changes)
+- Same repository (not a fork)
+- Branch exists on remote
+- Same Claude.ai account on both environments
+- CLI version 2.1.0+
+
+### Workflow Example
+
+```bash
+# 1. Start task on web (claude.ai/code)
+#    "Refactor the authentication middleware"
+
+# 2. Session works in cloud sandbox
+
+# 3. Later, on local machine:
+claude --teleport
+# → Interactive picker shows available sessions
+
+# 4. Select session, Claude syncs:
+#    - Conversation context
+#    - File changes (via git)
+#    - Task state
+
+# 5. Continue work locally with full filesystem access
+```
+
+### Environment Support
+
+| Environment | Teleport Support |
+|-------------|------------------|
+| CLI/Terminal | Full bidirectional |
+| VS Code | Via terminal (not Chat view) |
+| Cursor | Via terminal |
+| Web (claude.ai/code) | Outbound only (web → local) |
+| iOS app | Monitoring only |
+
+### Current Limitations (Research Preview)
+
+> **⚠️ Important**: Session teleportation is in research preview. Expect rough edges.
+
+- **Unidirectional**: Web → local only (cannot teleport local → web)
+- **GitHub only**: No GitLab or Bitbucket support yet
+- **Subscription required**: Pro, Max, Team Premium, or Enterprise Premium
+- **Rate limits**: Parallel sessions consume proportional rate limits
+- **Git dependency**: Requires clean git state for sync
+
+### Troubleshooting
+
+| Issue | Solution |
+|-------|----------|
+| "Uncommitted changes" | Commit or stash changes before teleporting |
+| "Branch not found" | Push local branch to remote first |
+| "Session not found" | Verify same Claude.ai account on both |
+| "Teleport failed" | Check internet connectivity, try again |
+| Connection timeout | Use `claude --teleport <id>` with explicit ID |
+
+### Best Practices
+
+1. **Commit frequently** — Clean git state is required
+2. **Use meaningful branch names** — Helps identify sessions
+3. **Check `/tasks`** — Verify background task status before teleporting
+4. **Same account** — Ensure CLI and web use same Claude.ai login
+5. **Push branches** — Remote must have the branch for sync
+
+### Environment Variables
+
+| Variable | Purpose |
+|----------|---------|
+| `CLAUDE_CODE_DISABLE_BACKGROUND_TASKS` | Disable background task functionality (v2.1.4+) |
+
+---
+
 ## 🎯 Section 9 Recap: Pattern Mastery Checklist
 
 Before moving to Section 10 (Reference), verify you understand:
@@ -9245,6 +9351,10 @@ Before moving to Section 10 (Reference), verify you understand:
 - [ ] **Named Prompting Patterns**: As If, Constraint, Explain First, Rubber Duck, Incremental, Boundary
 - [ ] **Mermaid Diagrams**: Generate visual documentation for architecture and flows
 
+**Advanced Workflows**:
+- [ ] **Session Teleportation**: Migrate sessions between cloud and local environments
+- [ ] **Background Tasks**: Run tasks in cloud while working locally (`%` prefix)
+
 ### What's Next?
 
 **Section 10 is your command reference** — bookmark it for quick lookups during daily work.
@@ -10403,6 +10513,22 @@ claude
 
 > **📖 Deep Dive**: For detailed integration patterns, ready-to-use prompts, and tool comparisons, see the [complete AI Ecosystem guide](./ai-ecosystem.md).
 
+### For Non-Developers: Claude Cowork
+
+If you work with non-technical team members, **Cowork** brings Claude's agentic capabilities to knowledge workers without requiring terminal access.
+
+| Aspect | Claude Code | Cowork |
+|--------|-------------|--------|
+| Target | Developers | Knowledge workers |
+| Interface | Terminal | Desktop app |
+| Execute code | Yes | No (files only) |
+| Outputs | Code, scripts | Excel, PPT, docs |
+| Status | Production | Research preview |
+
+**Collaboration pattern**: Developers use Claude Code for specs → PMs use Cowork for stakeholder summaries. Shared context via `~/Shared/CLAUDE.md`.
+
+> **Availability**: Max subscribers only (~$200/mo), macOS only (Jan 2026).
+> See [AI Ecosystem Section 9](./ai-ecosystem.md#9-claude-cowork-research-preview) for details.
 
 ## Further Reading
 
@@ -10816,4 +10942,4 @@ Thumbs.db
 
 **Contributions**: Issues and PRs welcome.
 
-**Last updated**: January 2026 | **Version**: 3.9.1
+**Last updated**: January 2026 | **Version**: 3.9.4
diff --git a/machine-readable/reference.yaml b/machine-readable/reference.yaml
index 3188f71..75046ca 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: "3.9.1"
+version: "3.9.4"
 updated: "2026-01"
 
 # ════════════════════════════════════════════════════════════════
@@ -91,18 +91,28 @@ deep_dive:
   git_best_practices: 8190
   subscription_limits: 1750
   cost_optimization: 8047
-  commands_table: 9267
-  shortcuts_table: 9300
-  troubleshooting: 9426
-  cheatsheet: 9801
-  daily_workflow: 9877
-  # AI Ecosystem (Section 11, ~line 10156)
-  ai_ecosystem: 10156
-  ai_ecosystem_complementarity: 10170
-  ai_ecosystem_tool_matrix: 10196
-  ai_ecosystem_workflows: 10221
-  ai_ecosystem_integration: 10347
+  session_teleportation: 9223
+  commands_table: 9399
+  shortcuts_table: 9432
+  troubleshooting: 9558
+  cheatsheet: 9933
+  daily_workflow: 10009
+  # AI Ecosystem (Section 11, ~line 10271)
+  ai_ecosystem: 10271
+  ai_ecosystem_complementarity: 10285
+  ai_ecosystem_tool_matrix: 10311
+  ai_ecosystem_workflows: 10336
+  ai_ecosystem_integration: 10462
   ai_ecosystem_detailed: "guide/ai-ecosystem.md"
+  ai_ecosystem_alternative_providers: "guide/ai-ecosystem.md:902"
+  # Cowork documentation
+  cowork_full: "guide/cowork.md"
+  cowork_section: "guide/ai-ecosystem.md:701"
+  cowork_comparison: "guide/cowork.md:115"
+  cowork_use_cases: "guide/cowork.md:140"
+  cowork_security: "guide/cowork.md:200"
+  cowork_workflows: "guide/cowork.md:270"
+  cowork_ultimate_guide: 10521
 
 # ════════════════════════════════════════════════════════════════
 # DECISION TREE (most important - en premier)
@@ -156,6 +166,9 @@ commands:
   /model: "switch: sonnet|opus|opusplan"
   /mcp: "show MCP server status"
   /context: "detailed token breakdown"
+  /teleport: "bring web session to local CLI"
+  /tasks: "monitor background tasks"
+  /remote-env: "configure cloud environment"
 
 # ════════════════════════════════════════════════════════════════
 # SHORTCUTS - see deep_dive.shortcuts_table
@@ -165,6 +178,7 @@ shortcuts:
   Esc×2: "rewind/undo"
   Ctrl+C: "interrupt"
   Ctrl+R: "retry"
+  Ctrl+B: "background all tasks"
   "@file": "reference file"
   "!cmd": "shell command"
 
@@ -174,6 +188,7 @@ shortcuts:
 cli:
   "-c": "continue last session"
   "-r <id>": "resume specific session"
+  "--teleport": "bring web session to local CLI"
   "-p": "non-interactive (pipe mode)"
   "--model X": "select model"
   "--dangerously-skip-permissions": "auto-accept ALL (danger)"
@@ -345,7 +360,7 @@ rules:
 ecosystem:
   this_guide:
     focus: "Education - Learn & master"
-    unique: ["architecture docs", "TDD/SDD methodologies", "217-question quiz", "YAML index"]
+    unique: ["architecture docs", "TDD/SDD methodologies", "227-question quiz", "YAML index"]
   complementary:
     claude_code_templates:
       url: "github.com/davila7/claude-code-templates"
@@ -358,6 +373,11 @@ ecosystem:
       url: "github.com/wesammustafa/Claude-Code-Everything"
       focus: "Visual walkthrough - Screenshots, BMAD method"
   install_templates: "scripts/install-templates.sh"
+  cowork:
+    description: "Claude Code for non-developers (desktop app)"
+    status: "Research preview - Max/macOS only (Jan 2026)"
+    blog: "https://claude.com/blog/cowork-research-preview"
+    guide: "guide/cowork.md"
 
 # ════════════════════════════════════════════════════════════════
 # ONBOARDING MATRIX - Maps user profile → content sections