Hid unchanged plan comment not working

[ggMartinez]

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Overview of the Issue

The option to hide unchanged plan comments via environment variable (ATLANTIS_HIDE_UNCHANGED_PLAN_COMMENTS ) is not working.

https://www.runatlantis.io/docs/server-configuration#hide-unchanged-plan-comments

Would like to being able to enable that so every push on the PR shows the result of atlantis, and does not looks like is not working

Reproduction Steps

Just set that variable in Docker compose. Is not doing anything. If there PR does not implement changes, there is no comment on Gitlab

Logs

{"level":"info","ts":"2026-03-25T04:09:42.967Z","caller":"events/project_command_builder.go:412","msg":"0 projects are to be planned based on their when_modified config","json":{"repo":"terraform/resources/backups","pull":"18"}}

Environment details

• Atlantis version: v0.40.0
• Deployment method: Docker
• If not running the latest Atlantis version have you tried to reproduce this issue on the latest version:
• Atlantis flags:

Repo atlantis.yaml file:

version: 3
projects:
  - dir: .