Linus Level v0.1.5

What's changed

• Adds native Claude Code plugin metadata in .claude-plugin/plugin.json.
• Adds a Claude Code marketplace catalog in .claude-plugin/marketplace.json so users can install with /plugin marketplace add rsoffer/linus-level-skill and /plugin install linus-level@linus-level-skills.
• Documents Claude Code marketplace installation, validation, local testing, and official Anthropic submission paths.
• Bumps plugin distribution metadata to 0.1.5.

Validation

• claude plugin validate .claude-plugin/plugin.json
• claude plugin validate .
• isolated local marketplace add/install test
• claude plugin tag --dry-run
• unzip -t dist/linus-level.zip