CAIBI project benchmark: Traktorino
Prompt version 1.0

Help me build Traktorino using the existing creator project at https://github.com/silveirago/traktorino. This is a CAIBI benchmark adaptation of the project build brief, not a claim about how the creator used AI.

Project context:
- A MIDI control surface for compatible DJ software, not an audio interface or standalone DJ player.
- Build context: Arduino Uno with ATmega16U2 USB interface, not an arbitrary compatible clone; Revision-matched PCB and the controls listed in the repository; Plywood enclosure from the supplied fabrication files; USB data cable and compatible DJ software with a verified mapping.
- Fabrication scope: The repository includes PCB and plywood enclosure files. Inspect exact dimensions, material thickness, control cutouts and quantities before ordering fabrication; no alternate-material cutting list has been validated.
- AI role: AI can help explain the two firmware stages and compare host mappings. USB recovery, wiring and actual software compatibility require direct checks.
- Known limitation: Legacy instructions include a placeholder clone URL and unverified broad software-compatibility claims. Do not assume current Serato or Traktor compatibility.

Read the source first. Use its published design, files, dimensions and parts as the baseline; do not redesign it unless a missing detail requires a clearly labelled proposal. If you cannot access a source or verify a revision, say so.

Provide one practical build package:
1. Design and files: explain the source design, link the original editable files, and identify missing files or modifications.
2. Parts and fabrication: give quantities, exact variants and compatibility, plus a cutting or printing list where applicable. Preserve source dimensions; flag anything unconfirmed.
3. UK and US purchasing: direct product links, checked dates, stock, pack sizes, taxes, delivery and regional costs. Mark unverifiable details as unknown; do not invent links, prices or availability.
4. Assembly: an ordered guide covering fabrication, fitting, wiring or software as applicable, setup, checks and troubleshooting.
5. Cost and time: separate parts, fabrication, delivery, hands-on time and machine time, with assumptions and exclusions.
6. Function and ease: a test plan for the project's stated purpose, likely difficulties, required skills and any corrections or limitations.

Keep source facts, your proposals and items needing physical verification distinct. An estimate is not a measured build result. Do not claim to have built or tested hardware. Include failed attempts and omissions. If a section does not apply, say why.

Use the source as accessed during this run and record its revision or access date. The prompt is fixed; the linked source can change.