Warehouse-to-Van Transfer & Pick Ticket
Build an internal tool that moves parts from the warehouse onto a specific van, prints a pick ticket, and updates both stock balances only after a real person confirms the pick and the tech confirms receipt - so your counts never drift.
A logged-in tool where a transfer request becomes a pick ticket, the warehouse lead confirms the physical pick, the receiving tech confirms receipt, and both warehouse and van balances update in one safe, audited move - with a clean CSV export.
Before you start
- A Google Sheet or CSV of your warehouse stock balances
- A Google Sheet or CSV of your van/truck stock balances
- A parts catalog (part numbers, descriptions, units)
- Free Vercel, Supabase, and Resend accounts
The problem this kills
Parts walk out of the warehouse and onto vans all day, and somehow the numbers never agree. The warehouse spreadsheet says you have twelve of a part; the van says it has three; the truck actually has none because someone grabbed them last Tuesday and nobody wrote it down. When counts drift, techs show up to jobs without the part, the parts coordinator orders things you already own, and month-end inventory becomes a guessing game.
The root cause is almost always the same: stock moves physically before anyone records it, or it gets recorded twice, or it gets recorded but the matching warehouse number never goes down. There's no single moment where "this stack of parts left here and arrived there" is confirmed by both sides.
What you'll build
A small web app your team logs into that turns a loose handoff into a clean, two-sided transaction. Someone requests a transfer of specific parts to a specific van. The tool prints a pick ticket. The warehouse lead physically pulls the parts and confirms the pick - which moves the stock into an "in-transit" state, not yet on the van. The receiving technician confirms receipt - and only then do both balances update: warehouse down, van up. Every step is stamped with who did it and when.
It refuses to let the warehouse go negative, it tracks what's in-transit so nothing is double-counted, and it blocks the same transfer from being processed twice. When you're done, you can export the full transfer log plus the updated balances as a CSV in exactly the columns your system of record expects.
What's inside the Implementation Plan
The plan opens by interviewing you about your actual business - your warehouses and vans, how your part numbers and SKUs are written, your real stock volumes, who is allowed to confirm a pick versus a receipt, and the messy exceptions you hit (partial picks, damaged parts, returns to warehouse). It reflects a short spec back to you for a thumbs-up, then tailors the data model and every build step to your answers. You are not getting a generic template - you're getting your tool.
From there it walks you, prompt by ready-to-paste prompt, through standing up the database, the login, the transfer request screen, the pick ticket, the two-sided confirmation flow, the balance math, and the CSV import/export fallback so you can build it today even if you have no API into your existing system.
The governance it includes (this is the point)
- Login so only your team can touch stock.
- Row-level security so each company only ever sees its own warehouses, vans, and transfers.
- A full audit trail - every request, pick confirmation, and receipt is recorded with the person and timestamp.
- A hard human-in-the-loop gate - balances are never written until a warehouse lead confirms the physical pick and a tech confirms receipt.
- Duplicate guards - a transfer ID can only be processed once, and the warehouse can never be driven negative.
Who it's for
Warehouse leads, parts coordinators, and field-service technicians who are tired of stock counts that lie. If you can fill in a spreadsheet, you can build this.
You've got this - paste the first prompt and let the interview tailor it to your shop.