Upbound Skills

The Upbound Platform manages a fleet of Kubernetes control planes, Crossplane or otherwise. These skills teach a coding agent to query and change that fleet correctly — which mostly means stopping it from confidently reporting numbers that are wrong.

Agent Skills are instructions an agent loads when a task matches them.

Install

Claude Code is the supported agent today.

/plugin marketplace add upbound/skills
/plugin install upbound@upbound

marketplace add registers the source; install adds the plugin. Once this lands in Anthropic’s plugin directory, /plugin install upbound@claude-plugins-official will be enough on its own.

To try it without installing:

git clone https://github.com/upbound/skills upbound-skills
claude --plugin-dir upbound-skills

Updating

claude plugin marketplace update upbound   # refresh the source
claude plugin update upbound@upbound       # then the plugin; restart to apply

claude plugin list shows the version you are on, and the version here is bumped on every merge that touches skills/.

Worth doing rather than leaving to drift. A skill is instructions, so an out-of-date copy does not fail — it keeps confidently answering from whatever it last knew, including endpoints and field names that have since been corrected.

Other agents

Not supported yet, though the skills carry no vendor-specific frontmatter, so copying skills/upbound-hub/ into another agent’s skills directory should load. Nothing here is tested against another agent, and the scripts assume bash, curl, and jq.

Adding an agent means a manifest alongside .claude-plugin/; the layout is arranged so it moves no files.

Prerequisites

The control-plane-project suite is eight skills that work together: control-plane-project-charter holds the shared rules and per-language references, and author-composition, author-tests, author-configuration-package, verify-configuration, e2e-test-configuration, plan-v2-migration, and execute-v2-migration reference it. Loading a task skill does not load the charter: each one tells the agent to load it as well, and agents often skip that step. Install them together; copying one of them on its own leaves it without the charter.

To review a change, the Crossplane-specific checks are on one page: review.md.

On first run the upbound-hub skill downloads a credential helper from storage.googleapis.com and checks it against a published SHA-256. It asks once for your Hub API endpoint and saves it,