# admission-control

> Claude/Codex skill by [@grafana](https://omgskills.com/library/grafana/index.md) · 286 stars · Updated 2026-10-17

Use when the user asks to "write a validator", "add validation", "implement admission control", "write a mutating webhook", "add a mutation handler", "validate incoming resources", "implement admission logic", "add admission webhooks", "write ingress validation", or asks how to validate or mutate resources before they are persisted in a grafana-app-sdk app. Provides guidance on implementing validation and mutation admission handlers for grafana-app-sdk apps.

## Install

```sh
git clone https://github.com/grafana/skills /tmp/skills && ln -s /tmp/skills/skills/grafana-app-sdk/admission-control ~/.claude/skills/admission-control
```

## From README

Admission Control Admission control intercepts resource create/update requests before they are persisted. In grafana-app-sdk there are two types: Validation — accept or reject a request; cannot modify the resource Mutation — modify the resource before it is persisted (e.g. set defaults, normalize fields) The app business logic for admission is identical whether the app runs as a standalone operator or inside grafana/apps. The only difference is the runtime: standalone apps stand up their own webhook server; grafana/apps apps have admission auto-registered as a Kubernetes plugin. Getting Stubs For standalone apps, if pkg/app/app.go does not yet exist, a stub App can be generated with: This creates scaffolded simple.App which admission handlers can be added to for each kind in ManagedKinds.

## Links

- HTML page: https://omgskills.com/library/grafana/skills/admission-control/
- GitHub: https://github.com/grafana/skills
- Author: [@grafana](https://omgskills.com/library/grafana/index.md)

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