# How to make a rulebook page keeper with vibe CAD

Keep a thin game rulebook open at a chosen spread using a loose corner sleeve. The design rests over a measured page stack with a wide visible opening, avoiding a tight spring clip or pressure near the book's binding.

Category: Tabletop games. Difficulty: Beginner.

By partsforagents · AI-authored · Updated 2026-11-10.

## Make this project
An unprinted reading accessory; it is not an archival or damage-prevention product.

This recipe has not been physically validated. Create and inspect the exact CAD for your dimensions; a concept image is not an orderable CAD file.

## 1. Measure
- Page-stack thickness at the chosen open spread.
- Width of the blank outer page margin.
- Corner shape and any rounded page edges.
- Desired reach of the keeper along each edge.

## 2. Give your CAD agent this prompt

Design a loose rulebook corner keeper with page_stack_thickness, sleeve_clearance, margin_width, edge_reach, window_width and wall_thickness. Ask for missing dimensions and whether the booklet has a soft cover. Use rounded open edges and a large text-viewing window. Keep the keeper away from the binding and do not create spring pressure. Include a short edge-section coupon for a disposable paper mockup.

## 3. Model and inspect
1. **Choose a blank corner** — Open the booklet at the intended spread and identify a margin without text or diagrams. Measure the page stack there rather than the closed booklet thickness.

2. **Build the loose sleeve** — Create a shallow corner channel with rounded entries. Leave an open window over the page so most of the margin remains visible.

3. **Review removal** — Model the keeper sliding off the outer corner. Keep internal surfaces plain and avoid raised text or small projections that could catch a page.

## 4. Check the prototype
- Try a paper mockup to confirm the keeper does not cover content.
- Review the edge coupon using spare paper before considering the actual booklet.
- Inspect the section for room around the page stack without forced compression.

## Avoid this mistake
A keeper measured on the closed booklet can be much too loose when only a few pages sit beneath it.

## Choose the material
PLA or PETG can be explored. Favor loose geometry and accessible smooth edges rather than relying on material springiness.

## Order this part now

[Submit your CAD](https://partsforagents.com/for-humans?project=rulebook-page-keeper#workspace) or [connect your agent](https://partsforagents.com/guides/cad-to-print#connect).

Have the model ready? Upload the exact customer-approved file. Starting from this guide? Generate the CAD from your measurements, inspect it and export the revision you want made. Include this guide URL in the review notes; the file and approved specification determine the part.

Required inputs:
- Authorized exact CAD file
- Declared units
- Material family and requested grade/color
- Quantity
- Intended use and critical fit requirements
- Contact email
- Destination country and postal code

**No payment at submission.** Submit a nonbinding manufacturing request now; the exact reviewed offer and payment link follow when ready. Current firm production scope is reviewed PLA/PETG for eligible contiguous-US/DC delivery.

### Agent submission steps
1. **upload_cad_request** — Get authorization to store/process the exact exported file, then use its bytes and approved intake fields. Save the returned request ID and file SHA-256.

2. **get_cad_preflight** — Read measured geometry and unknowns for that uploaded file.

3. **set_manufacturing_specification** — Save the customer-approved manufacturing choices and returned specification fingerprint.

4. **place_order** — Submit order_type manufacturing with the real request ID, exact specification fingerprint, acknowledge_nonbinding true and a saved unique idempotency key. Include this guide URL in review_notes along with the approved requirements.

5. **get_order_fulfillment** — Use the returned order ID to read the authoritative offer and manufacturing progress. A recipe URL alone never identifies an order.

Reconcile an uncertain result before retrying. Reuse identical arguments and the same idempotency key; never submit a second request just because its payment link is pending.

## Machine-readable resources

- [This complete guide as JSON](https://partsforagents.com/vibe-cad/rulebook-page-keeper/guide.json)
- [All project guides](https://partsforagents.com/vibe-cad/catalog.json)
- [Exact tool schemas](https://partsforagents.com/tools.json)
- Full workflow MCP: https://partsforagents.com/api/mcp (authenticated)
- Free advice MCP: https://partsforagents.com/api/advice/mcp
- Canonical guide: https://partsforagents.com/vibe-cad/rulebook-page-keeper