How do I install the Custom Cad skill?

Run npx skillmds@latest add nethrananda21/custom-cad in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Custom Cad safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Custom Cad?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Custom Cad free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Custom Cad?

nethrananda21 (@nethrananda21) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Custom Cad by nethrananda21 — Agent Skill

Name: Custom Cad
Author: nethrananda21

Custom Cad

Fallback skill for custom or unclassified building types that don't match any standard domain. Use when the user requests a layout type not covered by residential, hospital, office, warehouse, restaurant, school, retail, gym, or parking skills — for example: museum, temple, church, mosque, community center, fire station, police station, post office, embassy, data center, recording studio, spa, salon, pet clinic, veterinary hospital, greenhouse, stable, kennel, laboratory, research facility. Use this skill ONLY when no other domain skill matches.

nethrananda21 e55f8a8 2 files · 6.9 KB Updated Sep 17, 2026

File contents

Custom Layout Skill

When no standard domain matches the user's request, use this skill. The LLM decides entity types, sizes, and spatial relationships based on domain knowledge and the user's description.

RULES

RULE C1 — No fixed standards. There are no predefined room standards. Use domain knowledge to estimate sizes.

RULE C2 — Name zones exactly. Name zones exactly as described by the user. Do not rename or abstract them.

RULE C3 — Apply cad-core rules. ALL cad-core geometric rules still apply — wall gaps, overlap detection, boundary containment, door/window validity. Only the room list and adjacency rules are custom.

RULE C4 — Estimate conservatively. When estimating room sizes, prefer larger estimates over smaller. A room that is too large can be shrunk; a room that is too small may not be functional.

RULE C5 — Mark all as estimated. Since there are no standard sizes, set estimated: true on every room and include all room names in flagged_estimated_rooms.

RULE C6 — Research the domain. Before placing rooms, think about what the building type needs:

What is the primary function zone? (e.g., gallery for museum, prayer hall for mosque)
What is the visitor/user flow? (entrance → reception → main area → support)
What needs to be adjacent? (e.g., stage near seating, kitchen near dining)
What needs separation? (e.g., noisy vs quiet, public vs restricted)

REFERENCES TO LOAD

Always load: references/estimation_guide.md — structured estimation approach for unknown building types (functional analogy, size tables, flagging protocol)

ESTIMATION GUIDELINES

Building Type	Primary Zone Size	Support Zone Size	Clearance
Museum/gallery	8000×10000	3000×4000	200
Temple/church	10000×15000	3000×3000	200
Community center	8000×8000	3000×4000	150
Fire station	8000×12000 (bays)	4000×4000	200
Data center	10000×8000	3000×4000	300
Spa/salon	4000×4000 (rooms)	2500×3000	150

These are starting points. Adjust based on the user's specific requirements.

---name: custom-caddescription: Fallback skill for custom or unclassified building types that don't match any standard domain. Use when the user requests a layout type not covered by residential, hospital, office, warehouse, restaurant, school, retail, gym, or parking skills — for example: museum, temple, church, mosque, community center, fire station, police station, post office, embassy, data center, recording studio, spa, salon, pet clinic, veterinary hospital, greenhouse, stable, kennel, laboratory, research facility. Use this skill ONLY when no other domain skill matches.---# Custom Layout SkillWhen no standard domain matches the user's request, use this skill. The LLMdecides entity types, sizes, and spatial relationships based on domain knowledgeand the user's description.---## RULES**RULE C1 — No fixed standards.**There are no predefined room standards. Use domain knowledge to estimate sizes.**RULE C2 — Name zones exactly.**Name zones exactly as described by the user. Do not rename or abstract them.**RULE C3 — Apply cad-core rules.**ALL cad-core geometric rules still apply — wall gaps, overlap detection, boundarycontainment, door/window validity. Only the room list and adjacency rules arecustom.**RULE C4 — Estimate conservatively.**When estimating room sizes, prefer larger estimates over smaller. A room that istoo large can be shrunk; a room that is too small may not be functional.**RULE C5 — Mark all as estimated.**Since there are no standard sizes, set `estimated: true` on every room and includeall room names in `flagged_estimated_rooms`.**RULE C6 — Research the domain.**Before placing rooms, think about what the building type needs:- What is the primary function zone? (e.g., gallery for museum, prayer hall for mosque)- What is the visitor/user flow? (entrance → reception → main area → support)- What needs to be adjacent? (e.g., stage near seating, kitchen near dining)- What needs separation? (e.g., noisy vs quiet, public vs restricted)---## REFERENCES TO LOAD- **Always load:** `references/estimation_guide.md` — structured estimation approach for unknown building types (functional analogy, size tables, flagging protocol)---## ESTIMATION GUIDELINES| Building Type | Primary Zone Size | Support Zone Size | Clearance ||-----------------|--------------------|-------------------|-----------|| Museum/gallery | 8000×10000 | 3000×4000 | 200 || Temple/church | 10000×15000 | 3000×3000 | 200 || Community center| 8000×8000 | 3000×4000 | 150 || Fire station | 8000×12000 (bays) | 4000×4000 | 200 || Data center | 10000×8000 | 3000×4000 | 300 || Spa/salon | 4000×4000 (rooms) | 2500×3000 | 150 |These are starting points. Adjust based on the user's specific requirements.

Frequently asked questions