## Summary
- Removed ANTHROPIC_API_KEY from the required environment variables list
- Added clarification that sub-agents spawned via the Task tool
automatically have access to Anthropic

#skip-bugbot

## Test plan
- Verify the documentation accurately reflects the current behavior of
the multi-pr-review skill

🤖 Generated with [Claude Code](https://claude.com/claude-code)
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<!-- This is an auto-generated description by cubic. -->
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## Summary by cubic
Clarified that ANTHROPIC_API_KEY is not required for the multi-pr-review
skill. Updated SKILL.md to note that sub-agents launched via the Task
tool already have Anthropic access, so only GITHUB_TOKEN is needed.

<sup>Written for commit f5735d135face9923420ecfa08ebcbfab60796dd.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>