T01 / T09

Status

Field	Value
Extension(s)	.t01, .t09
Common ecosystem	Wilcom conversion leads
Format family	Headerless stitch streams
Satin Studio status	Researching
Open / import	No
Export	No
Confidence	Low-medium.

What it is

T01 and T09 are tracked as Wilcom-related stitch-stream leads.

Satin Studio direction

Research after DST/VP3-family import foundations.

Versions and variants

Treat each numbered extension separately. The number may identify the underlying stitch encoding.

File identification notes

Reported details:

• .t01: DST-encoded stitch data without the 512-byte DST header.
• .t09: Pfaff-family data lead.

Observed structure notes

• Observed T01 support treats the body as DST three-byte records without the 512-byte DST header.
• T09 remains a Pfaff-family lead with insufficient structure detail here. Treat each numbered extension as its own dialect.

Structure sketch

Treat numbered T files as different leads. T01 is reported as DST body data without the DST header.

struct T01Candidate<'a> {
    dst_records_without_header: &'a [DstRecord], // no 512-byte DST header
}

struct DstRecord {
    b0: u8,
    b1: u8,
    b2: u8,
}

struct T09Candidate<'a> {
    header_or_metadata: &'a [u8],       // Pfaff-family lead, unverified
    payload: &'a [u8],
}

What we still need

Known files, safe signatures, and confirmation of underlying encodings.