BOM builder — draft, complete and check a bill of materials

What you get

A skill that turns a tech pack, sketch or style description into a factory-ready bill of materials in a fixed 22-column CSV, fills the gaps from your answers, reviews BOMs written by others and prepares the handover. Unknown suppliers, prices and lead times come back as TBC with a numbered list of questions — nothing is invented. Runs in Claude, ChatGPT, Gemini and Claude Code.

Use it for

• Draft a BOM from a tech pack or sketch, one row per component per placement
• Find the missing rows and wrong units in a BOM before it goes to the factory
• Compute per-unit material cost from consumption × wastage × unit cost, arithmetic shown
• Prepare the factory handover: sorted BOM, TBC note, pending approvals

What's inside

• SKILL.md — the skill: procedure, 22-column output format, self-checks, when to ask
• PROMPTS.md — Start · Fill · Check · Cost view · Handover prompts
• templates/bom.csv — empty BOM with the standard component rows pre-listed
• examples/bom-example.csv — the template filled once for a fictional field jacket
• platforms/chatgpt-instructions.md — Custom GPT / Project instructions
• platforms/gemini-gem.md — Gem instructions
• platforms/claude-code/.claude/skills/bom-builder/SKILL.md — Claude Code drop-in

Quick start

1. Unzip and open README.md.
2. Claude: Settings → Capabilities → Skills → upload SKILL.md. ChatGPT: paste platforms/chatgpt-instructions.md into a Project. Gemini: paste platforms/gemini-gem.md into a Gem. Claude Code: copy platforms/claude-code/.claude/ into your project.
3. Paste the Start prompt from PROMPTS.md and attach your tech pack.

Preview — one prompt from the kit

Review this BOM for {{style}} as a production coordinator would: {{bom}}

Check: every fabric/trim implied by the description has a row; every closure and label is present; units are per unit (not per order); no duplicate component+placement+colour rows; colour references exist for dyed parts; nothing looks invented. Then list findings as "Row → problem → fix", most costly mistake first. Do not rewrite the BOM unless I ask.