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The portable format stores installed family IDs, options and version numbers; it cannot supply a renderer class, callback or arbitrary method name. Import rejects unknown families, unsupported future versions, malformed flags, duplicate slugs and unknown options. It runs only the configuration migrations provided by your installed adapter. A value-version mismatch rejects; saved-value migration is a separate operation. The envelope supports up to 256 definitions and 1 MiB. This opt-in format is separate from the existing built-in schema import/export.

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Extension guides · Definition and registration reference
Last modified on October 16, 2026