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TaskGraph handles research with Claude Code’s own WebSearch and WebFetch tools. No Perplexity or other research API key is needed.

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CLI

The research role runs through the Claude Code provider with only WebSearch and WebFetch allowed. It has no file or shell tools and loads no MCP servers, so a hostile web page cannot reach your files. It uses your existing Claude Code login and needs no API key. The --research flag on commands such as add-task, expand, and parse-prd uses the same role.

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Claude Code plugin skill

The TaskGraph plugin ships a research skill (skills/research/SKILL.md). Claude Code loads it automatically when you install the plugin, and invokes it when a task needs current information, library documentation, or a comparison of options. It searches, reads the best sources in full, and answers with a short summary and source links.

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Optional: Context7 for library docs

Context7 is an MCP server that serves current library documentation. The research skill uses it when it is available. It is optional: without it, the skill uses the web tools only and nothing breaks. To enable it:
Restart Claude Code afterwards. Context7 applies to the plugin skill in an interactive Claude Code session. taskgraph research does not load MCP servers, so it never uses Context7.