First, create the stream you'd like to use for Jenkins or Hudson notifications, and subscribe all interested parties to this stream. We recommend the name jenkins or hudson.

Install the plugin
Install the "Zulip" plugin by going to Manage Jenkins > Manage Plugins > Available, typing in "Zulip", and clicking "Install without restart". (For historical reasons, the plugin might be named "Humbug Plugin" in some places)

Configure the plugin
Once the plugin is installed, configure it by going to Manage Jenkins > Configure System. Scroll to the section labeled "Zulip Notification Settings", and specify your bot's email address, API key, the stream receiving the notifications, and whether you'd like a notification on every build, or only when the build fails (Smart Notification).

(If you don't see this option, you may first need to restart Jenkins.)

Configure a post-build action for your project
Once you've done that, it's time to configure one of your projects to use the Zulip notification plugin. From your project page, click "Configure" on the left sidebar. Scroll to the bottom until you find the section labeled "Post-build Actions". Click the dropdown and select "Zulip Notification". It should look as below. Then click "Save".

Congratulations! You're done!
When your builds fail or succeed, you'll see a commit message like the following with a topic that matches the project name (in this case "SecretProject"):

Troubleshooting

• Did you set up a post-build action for your project?
• Does the stream you picked (e.g. jenkins) already exist? If not, add yourself to it and try again.
• Are your access key and email address correct? Test them using our curl API.
• Still stuck? Email zulip-devel@googlegroups.com.