# Spinnaker trigger expressions do not work with Harness Jenkins triggers

## TL;DR

Migrating from Spinnaker to Harness: Jenkins trigger payload expressions will not carry over, because Harness Jenkins triggers cannot receive payloads. Plan on a custom webhook trigger and pass the values (hash, branch) in the webhook body. Context: From the Harness Spinnaker migration prerequisites guide.

Use this when you run into the situation in the title.

**When not to use this skill:** unrelated tasks. It covers only the procedure above.

## Compatibility

The steps above apply to the commands named in them. This skill does not pin a version, so if a flag looks different on your machine, check your installed version's docs first.

## Details

Spinnaker expressions that read Jenkins trigger payloads, like the trigger properties hash expressions, have no equivalent in a Harness Jenkins trigger, which does not natively support passing payloads. The documented workaround is to switch to a custom webhook trigger and POST the payload yourself, then read it from the webhook payload instead.