Add Claude Code plugin structure for marketplace distribution

[bryan-anthropic]

Summary

Adds .claude-plugin/plugin.json and .claude-plugin/marketplace.json so the clickhouse-best-practices skill can be distributed through the Claude Code plugin marketplace.

This is a skills-only plugin — no MCP server, no .mcp.json, no behavioral changes. The existing skills/clickhouse-best-practices/ directory is referenced as-is.

What's added

File	Purpose
.claude-plugin/plugin.json	Plugin manifest — declares the skill, version, author, license
.claude-plugin/marketplace.json	Marketplace metadata — name, owner, category (database)

Both files pass claude plugin validate . cleanly.

Why

The Claude Code plugin marketplace requires these two files for a plugin to be discoverable and installable via claude plugin install. Without them, the skill works via npx skills add but isn't available in the Claude Code marketplace.

After merge

Once merged, the plugin can be submitted to the Claude Code marketplace for review and distribution. No changes to the existing npx skills add installation path.

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[Copilot]

Pull request overview

This PR adds Claude Code plugin marketplace distribution files for the clickhouse-best-practices skill. The PR introduces two JSON configuration files—plugin.json and marketplace.json—to enable the skill to be discoverable and installable through the Claude Code marketplace while maintaining compatibility with the existing npx skills add installation path.

Changes:

• Adds .claude-plugin/plugin.json with plugin manifest metadata (name, version, author, description, keywords, license, and skills reference)
• Adds .claude-plugin/marketplace.json with marketplace-specific metadata including owner information and categorization

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
.claude-plugin/plugin.json	Plugin manifest declaring the skill metadata and reference to the skill directory
.claude-plugin/marketplace.json	Marketplace distribution metadata with owner info, plugin details, and category classification

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[pjhampton]

Brilliant - thanks @bryan-anthropic. Can you sign the CLA and we will get this merged?

[bryan-anthropic]

@pjhampton should be good! it gave me an error at the end, so let me know if I need to sign it again.