JEF — Janome

The Janome / Elna / Kenmore format. Binary header with an offset table pointing to the coordinate blocks; colors via the Janome thread chart.

What it supports

• Trims: supported as a command in the stream.
• Colors: written as threads; the writer snaps them to the Janome chart (warn.COLOR_QUANTIZED).
• Hoop: JEF knows a few standard hoops (hoop code in the header).
• Coordinates: signed 0.1 mm deltas, long-form/multiples.

UI notes

JEF: colors are matched to the nearest Janome threads.

Recognizing

No reliable magic bytes; registry.ts resolves JEF by extension.

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