fetching-claude-docs

Use PROACTIVELY before writing or modifying any Claude Code component (subagent, skill, hook, rule, slash command, plugin manifest, settings.json, MCP config) to fetch the current official spec from code.claude.com and avoid drifting from up-to-date best practices. Use when user asks 'what is the official spec for X', 'is this the right way to do Y', 'check Anthropic docs for Z'. MUST BE USED at Task 0 of writing-subagents, writing-skills, writing-hooks, writing-rules, writing-claude-md before any design decision.