Supported regex patterns for generation guide

Machine Learning & AI Foundation Models
grabbou
grabbou OP
Created Jul ’25
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Hey Tried using a few regular expressions and all fail with an error:

Unhandled error streaming response: A generation guide with an unsupported pattern was used.

Is there are a list of supported features? I don't see it in docs, and it takes RegExp. Anything with e.g. [A-Z] fails.

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Apple Staff, DTS Engineer
DTS Engineer OP
Apple
Jul ’25

As of today, custom ranges like [a-Z] aren’t supported. If you don't mind, please file a feedback report and share your report ID here for folks to track. Thanks.

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.

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Supported regex patterns for generation guide
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