Add Research mode from Claude.ai to Claude Code

Claude.ai has a powerful "Research" mode that performs extended autonomous web research, synthesizing information from multiple sources over several minutes. This capability should be available in Claude Code.

Why this matters

• Terminal-based workflows are the most versatile for power users
• Research results could feed directly into coding tasks (e.g., "research best practices for X, then implement it")
• Scriptable and composable with other CLI tools
• Fits developer workflows better than switching to web UI

Suggested implementation

• A /research command or --research flag
• Could spawn a background agent that returns results when complete
• Integration with existing Task/Agent infrastructure

Use cases

• Researching API documentation before implementation
• Investigating best practices for a technical approach
• Gathering context on unfamiliar codebases/technologies
• Competitive analysis for product features