# Create a simple part from a brief

> Describe a block with all three sizes and get a checked native part and STEP file. Leave a size out and it asks.

Status: Available · Level: Everyday · About 6 minutes · Canonical: https://paracrux.com/docs/create-a-simple-part

## You need

- The app activated
- Agent connection set to CueCrux Credits or OpenAI Subs (shown beside Send)
- SOLIDWORKS with a default Part template
- A design conversation open in the Solidworks Agent workspace

## You'll come away with

- Brief the Agent for a new rectangular part
- See what it checks before it tells you it is done
- Know where the files are saved

## Step by step

1. **Write the brief.** State every size and its unit. The Agent can create one new shape today: a rectangular block.
   Try saying: "Create a new rectangular box, 100 mm wide, 50 mm deep and 25 mm high."
2. **Watch it convert units.** SOLIDWORKS works in metres, so the Agent sends 0.1, 0.05 and 0.025. Anything outside 0.000001 to 10 m is refused before SOLIDWORKS is touched.
3. **Check the result.** The part is saved, closed and reopened. The reopened body count, volume, area and bounds are compared, and the STEP export gets a recorded fingerprint.
4. **Find the files.** New saves go into the design's own revision folder: Projects, then your project, Designs, your design, Revisions, 001. Use Open output folder from the chat card.
5. **Leave a size out on purpose.** Brief it without a height. It does not invent one. It asks you.
   Try saying: "Create a box 100 mm wide and 50 mm deep. Height is not yet decided."

## Walkthrough

A walk-through of one job. The routing scores are real benchmark answers. The part's numbers are calculated from your brief, not measured in SOLIDWORKS.

- **You:** Create a new rectangular box, 100 mm wide, 50 mm deep and 25 mm high.
- **Route (shadow mode):** Route = create box; Confidence = 0.97, 0.96; Floor to decide = 0.80
- *The typed routing layer (shadow mode) reads the request. In the 28 September benchmark it chose create box with 97% and 96% confidence over two runs.*
- Provenance: recorded

- **Agent:** All three sizes are given. I'll create one rectangular part and save native and STEP copies to this design.
- **Tool call:** `solidworks_create_box` {"width":0.1,"depth":0.05,"height":0.025}
- *Sizes go to SOLIDWORKS in metres.*
- Provenance: illustrative

- **Checks on reopen:** Bodies = 1; Volume = 125,000 mm³; Surface area = 17,500 mm²; Bounds = 100 × 50 × 25 mm; STEP export = fingerprint recorded
- *100 × 50 × 25 = 125,000 mm³, and 2 × (5,000 + 2,500 + 1,250) = 17,500 mm². The real run reads these back from the reopened part.*
- Provenance: calculated

- **Agent:** Saved to Revisions/001 as a native part and a STEP file. The sketch is not fully constrained; add relations if you will edit it.
- Provenance: illustrative

- **You:** Create a box 100 mm wide and 50 mm deep. Height is not yet decided.
- **Route (shadow mode):** Route = clarify; Confidence = 1.00, 1.00
- *The same benchmark case, with the height missing. It routed to clarify at full confidence on both runs.*
- Provenance: recorded

- **Agent:** What height should it be? I won't pick one for you.
- **Gate:** Nothing is created until you answer.
- Provenance: illustrative

## What it won't do

- It creates rectangular blocks only, and never approximates another shape with one.
- The sketch it makes is not fully constrained.
- Checks cover body count, volume, area and bounds. Feature intent and engineering correctness are not checked.
- Routing runs in shadow mode: it records its choice but does not steer the Agent yet.

## Covers

- Projects, designs and intent (Available): Keep each piece of work in a numbered project and design, with the intent and instructions the Agent follows. Where: Home → Solidworks Agent (Open project workspace)
- Create a simple box part (Available): Ask for a rectangular block with all three sizes and get a native part and a STEP file, both checked. Where: Solidworks Agent workspace, in a design conversation
- Typed request routing (Lab): A separate model picks a fixed route for each request, or abstains below 80% confidence. Shadow mode only. Where: How it decides page

## Next

- [Change a dimension on a copy](https://paracrux.com/docs/change-a-dimension-safely.md): Propose a new value, run it on a copy, check the result independently, then accept or reject. Your original is never touched.
- [How a job spends AI credit](https://paracrux.com/docs/how-a-job-spends-credit.md): What leaves your machine, how each step reserves its cost, and where a job always stops.