Thread charts

Status

Field	Value
Extension(s)	.inf, .txt, .csv
Common ecosystem	Sidecar metadata
Format family	Sidecar/report file
Satin Studio status	Researching
Open / import	No
Export	No
Confidence	Medium.

What it is

Thread chart files may carry color lists, thread order, or production notes beside sparse stitch streams such as DST or EXP.

Satin Studio direction

Treat as optional metadata requiring user review.

Versions and variants

Thread chart sidecars vary widely by software and seller. CSV, TXT, and INF files should be interpreted only after the specific layout is recognized.

File identification notes

Usually text or simple structured data; varies by workflow.

Observed structure notes

• Thread sidecars may be CSV-like rows, INI/INF-style sections, simple line-oriented text, or vendor-specific color files.
• They should be imported as reviewable metadata and matched against stitch-stream color blocks, not treated as authoritative by extension alone.

Structure sketch

Thread-chart sidecars are text-like metadata until a specific layout is recognized.

enum ThreadChartSidecar<'a> {
    Csv { rows: &'a [CsvRow<'a>] },
    Text { lines: &'a [&'a str] },
    Inf { sections: &'a [InfSection<'a>] },
}

struct CsvRow<'a> {
    fields: &'a [&'a str],
}

struct InfSection<'a> {
    name: &'a str,
    key_values: &'a [(&'a str, &'a str)],
}

What we still need

Known sidecar samples and thread-mapping rules.