* __Automatic [Google Container Registry](https://cloud.google.com/container-registry/) configuration__ - Keel automatically sets up topic and subscriptions for your deployment images by periodically scanning your environment.
* __[Native, DockerHub, Quay and Azure container registry webhooks](https://keel.sh/v1/guide/documentation.html#Triggers) support__ - once webhook is received impacted deployments will be identified and updated.
*__[Polling](https://keel.sh/v1/guide/documentation.html#Polling)__ - when webhooks and pubsub aren't available - Keel can still be useful by checking Docker Registry for new tags (if current tag is semver) or same tag SHA digest change (ie: `latest`).
* __Notifications__ - out of the box Keel has Slack, Hipchat, Mattermost and standard webhook notifications, more info [here](https://keel.sh/v1/guide/documentation.html#Notifications)
Before starting to work on some big or medium features - raise an issue [here](https://github.com/keel-hq/keel/issues) so we can coordinate our efforts.
If you wish to work on Keel itself, you will need Go 1.9+ installed. Make sure you put Keel into correct Gopath and `go build` (dependency management is done through [dep](https://github.com/golang/dep)).
To test Keel while developing:
1. Launch a Kubernetes cluster like Minikube or Docker for Mac with Kubernetes.
2. Change config to use it: `kubectl config use-context docker-for-desktop`
3. Build Keel from `cmd/keel` directory.
4. Start Keel with: `keel --no-incluster`. This will use Kubeconfig from your home.
