Flow code warning prompts misleading info

[akeller]

Describe the issue

Screen.Recording.2026-02-26.at.4.25.20.PM.mov

I get an error Validation error: Invalid type: io.kestra.plugin.slack.SlackIncomingWebhook, which is a known issue with plugin aliases and splitting the Slack/notifications plugins. If I hover over the warning in the flow code I get this:

Value must be "io.kestra.plugin.notifications.slack.SlackExecution" | "io.kestra.plugin.notifications.slack.SlackIncomingWebhook".

These are two different plugins and not exactly swappable.

This code is from the extension of the getting started example in the Error Handling tutorial. See flow id: getting_started_category_check.

Environment

• Kestra Version: develop

[proddata]

This seems to be related to some plugins missing in the develop build. works fine on e.g. 1.3-RC1

also see internal conversation https://kestra-io.slack.com/archives/C04HTFM3VL6/p1772194764890939

[akeller]

Moving to 1.3-RC1 did resolve this issue, but I had to navigate away from the flow with the warning and come back to it for the error to finally go away.

[proddata]

The Problem with the develop was that the mentioned plugins were not included.