I have reproduced the issue on the latest CLI version. Yes, I am on the latest version I have searched existing posts and this report is not a duplicate. Yes, this isn’t a duplicate In which of these areas are you experiencing a problem? App Expected behavior Able to run the app Actual behavior T…

Hi folks - we’ve just shipped an update which should resolve this issue. Can you please check to see if this error is no longer appearing.

Liquid syntax error : Unknown tag 'schema' when running shopify app dev

Liam-Shopify December 16, 2025, 10:33am 125

Hi again folks - we’re working on a fix for this now. Will keep this topic updated with our progress.

25 Likes

Missing schema warning in snippets

Topic		Replies	Views
Shopify Theme App Extension deploy fails with Liquid syntax error: Unknown tag 'schema' even though {% schema %} is valid Extensions theme-app-extension	3	154	December 16, 2025
Liquid Syntax Error: Unknown Tag ‘Schema' Extensions theme-app-extension	3	287	December 16, 2025
Deployment failing for Theme App Extension with schema tags in Liquid files Extensions checkout-ui-ext , theme-app-extension	2	91	December 16, 2025
CLI 3.84.1+ Regression: "Unknown tag 'schema'" for app_block with require_remote_ui Shopify CLI and Libraries app-commands	4	361	December 16, 2025
Missing schema warning in snippets Extensions theme-app-extension	15	741	December 16, 2025