Introduce 'caveman' Claude plugin: add .claude-plugin/plugin.json with plugin metadata and author, and add skills/caveman/SKILL.md documenting Caveman Mode rules, examples, and boundaries. Also update README install instructions to use the plugin marketplace and install commands for caveman.
Skill that reduces token usage ~75% by making Claude speak like a caveman
while maintaining full technical accuracy. Includes packaged .skill file,
README with install instructions, and MIT license.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>