10. 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

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	Pro or Max	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, and 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	Pro ($20/mo) or Max ($100-200/mo)
Platform	macOS only (Windows planned, Linux not announced)
Stability	Research preview

Deep Dive: For complete security practices, troubleshooting, and detailed use cases, see guide/cowork.md.