An AI tech pack generator turns a sketch, a reference and a brief into the technical specification a factory works from: flat drawings with callouts, a points-of-measure table, grading across the size range, a bill of materials, construction and finishing notes, and labelling. Most of the free tools online produce something that looks like a tech pack. Very few produce one a factory can use without a round of questions.
The reason is that a tech pack is mostly house knowledge. Where your brand measures the chest from, what your tolerances are on a knit versus a woven, which seam allowance your trouser block uses, which trims are approved. A model that does not have those rules guesses them, and a confident guess on a point of measure is worse than a blank field.
So the build starts with your existing tech packs, blocks and size charts. They become the reference the model drafts from and is checked against, and the output is written into the PLM record (Centric, Backbone, Lectra, or the spreadsheet template you already send) rather than into a new tool.