Text-to-CAD: parametric source, geometry evidence and responsible handoff
Build a CAD review notebook that exposes unknowns instead of inventing readiness
Design a local evidence table linking source revision, document bytes, measurements and snapshots before considering interactive geometry or machine integration.
What you will learn
- Start with evidence relationships
- Use interaction only where it answers a question
- Define an acceptance gate for the notebook itself
Before you start
- Basic Python functions, modules and file paths
- Understanding of units and the difference between a design and a physical part
Plan a bounded CAD exercise and distinguish source freshness, document inspection, visual review and manufacturing decisions.
Key takeaways
- Every observation should identify its artifact and evidence type.
- Spatial interaction complements measurements rather than replacing them.
- Unknown, rendered and manufacturing-ready are not interchangeable.
Start with evidence relationships
A useful extension is a read-only notebook for one sample part. Link its brief, source revision, output identity, measurement results and snapshot. Mark each observation as measured, visually inspected, unavailable or not applicable. The project is a proposal, not an existing Text-to-CAD feature claimed by this series.
For example, a reviewed screenshot can support orientation observations while the width remains unmeasured. An existing STEP can render while its source freshness is unknown. Keeping those states separate prevents a single green badge from overstating what the team actually knows.
Use interaction only where it answers a question
A later viewer can help rotate a model or compare a changed dimension, but it must load the correct artifact and retain textual measurements beside the scene. Three-dimensional interaction is useful for spatial relationships, not as a substitute for test results or as decoration on every article.
The first prototype can be a plain table with source and artifact identifiers plus links to local snapshots. This series supplies static semantic diagrams and the isolated proxy fixture, not an embedded CAD engine or a simulated manufacturing pass. Unknown geometry must not be filled with invented sample measurements.
Define an acceptance gate for the notebook itself
Check that each displayed value names its artifact and evidence source, stale observations remain distinguishable, and missing files are reported. Keep source freshness separate from document rendering and process suitability. A future integration should refuse to summarize absent measurements as successful checks.
Only after the read-only notebook is useful should a project consider controlled rebuilds or external handoffs. Model execution, slicing, uploads and physical operation require distinct decisions. The proposal does not connect to a printer or turn an educational geometry workflow into unattended manufacturing.
Decision guide
| Criterion | Option A | Option B |
|---|---|---|
| Best when | You need predictable behavior and easy auditing | You need adaptive optimization and have reliable telemetry |
| Main risk | May leave performance on the table | Can become difficult to explain or debug |
Implementation steps
- 1
Define evidence fields for one synthetic part.
- 2
Keep source and document identity separate.
- 3
Display missing and stale observations explicitly.
- 4
Validate the read-only notebook before adding actions.
Copy-ready example
{
"proposal": true,
"artifact": "sample.step",
"sourceFreshness": "unknown",
"snapshotReview": "not run",
"widthMeasurement": null,
"processAssessment": "not run",
"machineActionsEnabled": false
}Frequently asked questions
Does this article include a working browser CAD engine?
No. It proposes an evidence notebook and provides static explanatory diagrams.
Should one successful screenshot turn the whole review green?
No. Other required measurements and process checks can still be missing.
Sources
- Text-to-CAD / skills/cad/SKILL.mdSource checked 2026-09-14
- Text-to-CAD / skills/cad-viewer/SKILL.mdSource checked 2026-09-14
- Text-to-CAD / skills/dfam-check/SKILL.mdSource checked 2026-09-14