> ## Documentation Index
> Fetch the complete documentation index at: https://ravion-b90c0359-devin-1786804702-tf-policy-checks.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Link modules to external systems

> Add custom HTTP links to each Ravion module for quick access to dashboards, runbooks, cloud consoles, and other systems from the module page in the dashboard.

Modules can display custom HTTP links on their page in the dashboard — one-click access to the things you reach for while operating a service: the live service URL, the AWS console, an external monitoring dashboard, a runbook, or anything else with a URL.

## Where links come from

Links are declared in the module's [definition](/modules/overview), so every instance of a module gets them automatically. Each link has two fields:

| Field  | Description                                                                                                                        |
| ------ | ---------------------------------------------------------------------------------------------------------------------------------- |
| `name` | Display name shown in the dashboard.                                                                                               |
| `href` | The URL. Accepts template expressions like `<< output.xxx >>`, so it can reference values that only exist after the stack applies. |

Because `href` is templateable, links resolve **per module instance**. A link built from a stack output — a load balancer DNS name, a CloudFront domain, a function URL — points at that instance's own resource, so the staging instance links to staging and the production instance links to production.

For example, [`rvn-aws-static`](/module-definitions/catalog/rvn-aws-static) links to the site's primary domain: the first domain alias when aliases are configured, otherwise the default `cloudfront.net` domain.

## For module authors

Declare links in the `ui.links` array of your module definition. See [UILink](/module-definitions/definition-schema/ui#uilink) in the definition schema and [template expressions](/module-definitions/definition-schema/template-expressions) for the values you can interpolate into `href`.