CAD Skill

Trigger

Use when the task requires one step in an interior-design workflow.

First-Use Reminder

On the first use of this skill in a conversation, remind the user that image generation reads config/image-provider.json, and that it must be filled in before any image can be produced.

Order

1. Confirm the task is an interior-design task.
2. Route the task to one step only: plan, 2d_svg, bom, or images.
3. Collect missing required context for that step.
4. Read the required references.
5. Produce the step artifact.
6. Export preview artifacts when requested.
7. Bundle artifacts when requested.

Classification

• plan
  • design strategy
  • requirement analysis
  • zoning logic
  • room program
• 2d_svg
  • new floorplan drafting
  • floorplan edits
  • redraw requests
• bom
  • bill of materials
  • procurement-ready lists
• images
  • analysis boards
  • renovation drawing boards
  • render sheets

Required References

• references/task-types.md
• references/output-contract.md
• references/image-provider-config.md
• references/image-agents/*.md
• prompts/router.md
• prompts/plan.md
• prompts/svg-router.md
• prompts/svg-patch.md
• prompts/svg-replace.md
• prompts/bom.md
• prompts/overall-analysis-board.md
• prompts/key-strategy-board.md
• prompts/master-renovation-scheme.md
• prompts/renovation-plan-layout.md
• prompts/floor-finish-plan.md
• prompts/reflected-ceiling-plan.md
• prompts/wall-setting-out-plan.md
• prompts/mep-plan.md
• prompts/elevation-index-and-interior-elevations.md
• prompts/detail-drawings.md

Routing Contract

• Route one step at a time.
• Prefer plan when no usable plan exists.
• Use 2d_svg for drawing, redrawing, and localized floorplan edits.
• Use bom only when a plan exists.
• Use images only when the task is to produce analysis boards, drawing boards, or render images.

Plan Contract

• Output one cad_plan artifact only.
• Keep assumptions explicit.
• Keep room names, functional needs, and constraints executable.
• Do not output SVG, BOM, or image tasks in the same step.

2D SVG Contract

• Output one cad_patch artifact or one full SVG result.
• Use patch for small precise edits.
• Use replace for broad redraws or unstable patch cases.
• Keep output limited to the 2D floorplan step.
• Export a local preview image when requested.

BOM Contract

• Output one cad_bom.csv artifact only.
• Base BOM on the current plan and 2D SVG.
• Keep columns normalized and machine-readable.

Images Contract

• Use prompts/overall-analysis-board.md to generate the text-model prompt for the overall analysis board.
• Use prompts/key-strategy-board.md to generate the text-model prompt for the key strategy board.
• Use prompts/master-renovation-scheme.md first to generate the text-model prompt for the master renovation scheme, then lock that JSON as the source of truth.
• After the master scheme, use one dedicated prompt file per sheet to generate seven different text-model prompts:
  • prompts/renovation-plan-layout.md
  • prompts/floor-finish-plan.md
  • prompts/reflected-ceiling-plan.md
  • prompts/wall-setting-out-plan.md
  • prompts/mep-plan.md
  • prompts/elevation-index-and-interior-elevations.md
  • prompts/detail-drawings.md
• Do not reuse one prompt for all seven outputs.
• For every analysis board or sheet, first produce a dedicated image prompt with the host model, then pass that image prompt to the configured image model.
• Require config/image-provider.json before image generation.
• Do not ask the user to paste API keys into chat.
• Stop and tell the user to fill config/image-provider.json when apiKey or model is missing.

Scripts

• scripts/generate-cad-image.mjs
• scripts/export-cad-2d-image.mjs
• scripts/build-cad-bundle.mjs

Deliverables

Preferred:

• cad_plan.json
• floorplan.svg
• floorplan.png
• cad_bom.csv
• generated image files
• metadata JSON

Optional on request:

• floorplan.jpg
• prompt text files