Add a Claude Code agent and skill for applying and verifying Varbase AI Content Review

Problem/Motivation

Applying this recipe has steps that are easy to miss. It needs a default chat model that supports tools. On Canvas pages, AI Content Review 1.0.0-alpha3 gives the review agents only the page's metadata, not its rendered text, so reviews of those pages say little without a patch. Reviewing an unchanged item again returns HTTP 409.

An AI coding assistant working on a site that uses the recipe has no guidance for any of this.

Steps to reproduce

• N/A

Proposed resolution

Ship two files in the recipe repository, written from the recipe's own code:

• .claude/skills/varbase-ai-content-review/SKILL.md: what the recipe installs, the apply commands, the steps after applying, browser checks and known traps.
• .claude/agents/varbase-ai-content-review.md: a thin operator that reads the skill and applies, repairs or verifies the recipe on a DDEV site.

No runtime code or config change. Sites that do not use Claude Code are not affected.

AI-Generated: Yes. Drafted with Claude Code.

Remaining tasks

• ✅ File an issue
• ❌ Addition/Change/Update/Fix
• ❌ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ❌ Developer Documentation support
• ➖ User Guide Documentation support
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ❌ Reviewed by a human
• ❌ Code review by maintainers
• ❌ Full testing and approval
• ❌ Credit contributors
• ❌ Review with the product owner
• ✅ Update Release Notes
• ✅ Release varbase_ai_content_review_base-1.0.0-rc1

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Added a Claude Code agent and skill for applying and verifying Varbase AI Content Review.