library/barcode

• wasi:filesystem Filesystem read-only

  ** (ro)

act:tools interface — expand a tool for its input schema.

• decode Decode every barcode in an image. Recognizes QR, Aztec, PDF417, DataMatrix and the 1D families (EAN-8/13, UPC-A/E, Code 39/93/128, ITF, Codabar). Supply exactly one of `data` or `path`. An optional `crop` region ([[x1,y1],[x2,y2]] pixel bounds) decodes just that part of the image, upscaling it first if it is small — useful for a small code in a large photo. Retail 1D results also carry a normalized 14-digit `gtin` and `check_digit_valid`.

  Decode every barcode in an image. Recognizes QR, Aztec, PDF417, DataMatrix and the 1D families (EAN-8/13, UPC-A/E, Code 39/93/128, ITF, Codabar). Supply exactly one of `data` or `path`. An optional `crop` region ([[x1,y1],[x2,y2]] pixel bounds) decodes just that part of the image, upscaling it first if it is small — useful for a small code in a large photo. Retail 1D results also carry a normalized 14-digit `gtin` and `check_digit_valid`.

  Parameter	Type	Description
  crop	array | null	Region to decode, as `[[x1, y1], [x2, y2]]` pixel coordinates (top-left and bottom-right corners) in the source image. Optional; omitting it decodes the whole image, exactly as before. A vision-capable agent that can see roughly where a code sits in a photo can pass its bounds here instead of sending the whole frame — useful when a small code in a large photo fails to decode at full resolution (see SKILL.md).
  data	object | null	Inline image bytes, as a CBOR byte string — or the canonical `{"$bytes": "<base64>"}` envelope over JSON transports.
  path	string | null	Path to an image file on the host. Requires a `wasi:filesystem` read grant covering this path.

  Returns content.

• generate_qr Generate a QR code from text and return it as a PNG image. The QR version is chosen automatically to fit the payload.

  Generate a QR code from text and return it as a PNG image. The QR version is chosen automatically to fit the payload.

  Parameter	Type	Description
  ecc	variant	Error-correction level: l, m (default), q, h
  dark	string | null	Foreground color as #rrggbb (default #000000)
  text*	string	Text to encode
  light	string | null	Background color as #rrggbb (default #ffffff)
  scale	integer | null	Module size in pixels (default 8, clamped to 1..=64)
  quiet_zone	boolean | null	Include the surrounding quiet zone (default true; scanners need it)

  Returns content.