You’re right — this is a templating issue. In Prefect 3.x automations, variables use underscores (not hyphens) and

flow_run.state

is an object, so you’ll typically want

.name

or

.type

. Also, your

{{> flow-run.id }}

has an extra

>

and the hyphenated variable name will break rendering. Use these instead: -

flow_run.name

-

flow_run.state.name

(or

flow_run.state.type

) -

deployment.name

-

flow_run.id

Even better, you can avoid hardcoding the UI path by using the built-in

ui_url

filter. If you’re sending a Slack notification (Send Notification action), a good template is:

Flow {{ flow_run.name }} is in state {{ flow_run.state.name }} for deployment {{ deployment.name|default('N/A') }}. <{{ flow_run|ui_url }}|Open run>

If you’re calling a webhook that expects JSON, make sure your payload renders valid JSON. For example:

{
  "text": "Flow {{ flow_run.name }} is in state {{ flow_run.state.name }} for deployment {{ deployment.name|default('N/A') }}. {{ flow_run|ui_url }}"
}

Notes: - Don’t use `flow-run.*`; use

flow_run.*

. - Don’t reference

flow_run.state

directly in strings; pick a field like

.name

or

.type

. - Avoid square brackets around Slack links. Use

<url|text>

format. -

deployment.name

can be missing for ad‑hoc runs, so

|default('N/A')

prevents nulls. If you tell me whether you’re using “Send notification” or “Call webhook” and which destination (Slack, Teams, etc.), I can tailor the exact message/payload for you.