# Claude Skills Sources (Accessed Feb 2026)

## Anthropic Documentation
- **Building with Claude (overview of capabilities)**  
  https://docs.anthropic.com/claude/docs/overview  
  Focus: high-level capabilities (text, code, vision, tool use), trust/safety positioning.

- **Tool use overview (client tools, server tools, strict tool use, MCP)**  
  https://docs.anthropic.com/claude/docs/agents-and-tools/tool-use/overview  
  Focus: tool schemas, tool use flow, strict tool use, MCP integration.

- **Computer use tool (desktop automation + agent loop + thinking)**  
  https://docs.anthropic.com/claude/docs/agents-and-tools/tool-use/computer-use-tool  
  Focus: computer-use tool actions, agent loop, security considerations, thinking parameter.

- **Web search tool (citations + dynamic filtering)**  
  https://docs.anthropic.com/claude/docs/agents-and-tools/tool-use/web-search-tool  
  Focus: server-side search, citations, dynamic filtering with code execution, prompt caching.

- **Web fetch tool (page/PDF retrieval + citations)**  
  https://docs.anthropic.com/claude/docs/agents-and-tools/tool-use/web-fetch-tool  
  Focus: server-side content retrieval, PDF support, citations, dynamic filtering, security.

## Anthropic Announcements
- **Claude 3 family (reasoning, vision, long context, structured output)**  
  https://www.anthropic.com/news/claude-3-family

- **Claude 3.5 Sonnet (agentic coding, vision, Artifacts, Memory direction)**  
  https://www.anthropic.com/news/claude-3-5-sonnet

- **Claude Sonnet 4.6 (1M context, computer use improvements, extended thinking, compaction)**  
  https://www.anthropic.com/news/claude-sonnet-4-6

## Notes
- Sources above are the only basis for claims in `claude-skills-overview.md` and
  `claude-skills-top-20.md`. No non-Anthropic sources were used.
- Several features are labeled “beta” in the docs; these are treated as optional capabilities.

