Parts-builder
Plain-English custom car part marketplace in early build: upload a 3D scan or describe a part, order it printed on demand; CNC machinability checks are a Phase 3 plan item, not built yet.
Summary rewritten from the vendor site because the catalog version did not match it.
What it does and how it connects
Parts Builder is a marketplace for custom car parts: upload a 3D scan (or rent one from the scan library), describe the part in plain English, and order it printed in nylon, carbon fiber or metal. Designers can sell their parts through their own branded store, and the project prints every order on demand.
The repository is at Phase 0, Foundations: the monorepo scaffold is in place, with the web app to deploy to Vercel and the geometry service to Fly.io next. A master plan covers the business model, architecture, data model and every task by phase, and an AI Builder implements tasks from it on branches with tests and pull requests.
CNC machining is a later phase: the plan's B3.8 task adds checks for machinable shapes (no undercuts, minimum inside corner radius) and a quote path for a CNC partner, with a flat bracket quoting for CNC and a shape with an undercut rejected with a reason. That check does not exist in the Phase 0 code.
Alternatives
Compare side by side- lime-slice
A filament slicer and solid modeler in one window with an MCP server, rather than a marketplace for ordering printed car parts.
- freecad-3dprint
An agent skill for designing 3D-printable parts in FreeCAD with a slicer gate, rather than a marketplace for custom car parts.
- hardware-ai
A Vercel-hosted workspace that turns a product idea into an engineering dossier for a first prototype, rather than a marketplace for printed car parts.
- Mechanism-AI
A constraint-driven agent for planar four-bar linkages that compiles CadQuery geometry, rather than a car-part marketplace.
Recurring errors it addresses
Error Index entries this tool is built to reduce or work around.
- Draft saves reported success without a read-back check, STL, OBJ, and 3MF exports could go stale when the mesh changed, and one replay scaled the box instead of the sphere after the sphere moved upstream.Error Index
- Tools claimed more than they do: fillet, chamfer, and offset were presented as exact rather than mesh approximations, layer counts as exact rather than estimates, and edge picks grabbed section-cut and hidden geometry.Error Index
- A lofted part pushed design_metrics to about 1.7 GB, past the 2 GB per-job cap, and OpenCascade aborted instead of raising. A 1.7 GB core dump landed in the part folder while the AI only saw 'crashed'; six older 1 GB core files show it had happened before.Error Index
Sources
Not verified
- License (no LICENSE file in the repository and no license stated in the README)
- Pricing (no price stated on the repository README)
- Real user voices (recent repo activity is the maintainer's own pull requests)
- A named individual builder beyond the repository owner handle Dandavkman
- A public release (no releases are published)
- CNC machinability rules as a current capability (the plan lists them as a Phase 3 task)
Last verified November 6, 2026. Listings are informational. The evidence score measures public, verifiable evidence and is not an endorsement or a compatibility claim.