feat: Add Perplexity CLI tool for researcher agent

[Steffen025]

Summary

Adds a working Perplexity CLI tool and updates the PerplexityResearcher agent to use it.

Problem

The PerplexityResearcher agent mentions "Perplexity API integration for deep search" but only instructs to "use the research skill" - there's no concrete implementation to actually call the Perplexity API.

Solution

• New CLI tool (.claude/tools/perplexity): A Bun-based wrapper that calls the Perplexity API directly
• Updated agent: Concrete CLI usage instructions with query decomposition methodology

CLI Features

• Loads API key from ~/.claude/.env (PERPLEXITY_API_KEY)
• Supports sonar (fast) and sonar-pro (deep) models
• Returns formatted results with citations
• Simple usage: perplexity "your query" or perplexity --model sonar-pro "deep query"

Example Usage

# Basic query
perplexity "What are the latest developments in AI agents 2025?"

# Deep research with sonar-pro
perplexity --model sonar-pro "Compare different approaches to building AI agent systems"

Test plan

• Tested CLI with valid API key
• Verified citation output formatting
• Tested both sonar and sonar-pro models

🤖 Generated with Claude Code

[danielmiessler]

Hey, thank you so much for this submission. We're about to change the project significantly to solve a number of core issues. Once we do that, let's revisit if it makes sense.