FEFO Pick Enforcement
Build an internal tool that directs pickers to the earliest-expiring lot of each SKU, blocks out-of-order picks, and routes every override through a supervisor - so product ships before it expires.
A login-protected app that turns pick demand into a FEFO pick list, blocks or flags out-of-order picks, requires supervisor approval (with a reason) for any override, and exports a clean CSV pick list plus a full audit log.
Before you start
- Lot-tracked on-hand with expiry by location (CSV or Google Sheet)
- Pick demand (order lines to fill)
- A free Supabase account and a free Resend account
The problem this kills
You sell lot-tracked, expiry-dated product - food, pharma, cosmetics, chemicals, anything with a shelf life. The rule is simple: ship the earliest-expiring lot first (FEFO - First Expired, First Out). The reality is not. Pickers grab whatever's closest on the shelf. Newer lots go out the door while older ones quietly age past their date in the back. Then you're writing off expired inventory, scrambling on customer minimum-shelf-life complaints, and explaining to quality why a recalled lot wasn't where the system said it was.
Spreadsheets can't enforce this. They show you on-hand by lot, but they don't stop a picker from grabbing the wrong one, and they don't capture why someone broke FEFO when a customer genuinely needed a different lot. So the rule lives in people's heads and breaks under pressure.
What you'll build
A simple internal web app that takes your lot-tracked on-hand (with expiry and location) and your pick demand, and produces a FEFO-enforced pick list: for every order line, it allocates the earliest-expiring available lot first. If someone needs to pick out of order, the app blocks it and forces a supervisor approval with a documented reason before it's allowed. Already-expired lots are flagged for hold, never picked. Customer minimum-remaining-shelf-life rules are honored automatically. Everything is logged - who picked, who approved, which lot, when - and the final pick list exports as a clean CSV in the exact columns your WMS or ERP expects.
What's inside the Implementation Plan
- It starts by interviewing you about your business. Before a single line of code, the plan has the AI agent ask you about your current pick process, your systems and sheets, your real SKU and lot naming conventions, your volumes, your approval rules, and your messy edge cases - then it tailors the data model and every later step to your answers. This is not a generic template; it becomes your tool.
- A clear definition of done, the accounts you'll need, and the full stack.
- An architecture diagram so you understand what you're building.
- The build, step by step, each ending with a ready-to-paste prompt: data model and FEFO allocation logic, the out-of-order block, the supervisor override gate, expired-lot hold flagging, customer shelf-life rules, the audit log, and the CSV export.
- A "No API yet?" fallback so you can build the whole thing today from a Google Sheet or CSV - no integration to your WMS required.
- A verification checklist so you can prove it actually enforces FEFO before you trust it.
The governance it includes (this is the point)
- Login so only your team can use the tool.
- Row-level security so each organization only ever sees its own lots and orders.
- A complete audit trail - every allocation, block, override, and approval, with who and when.
- A hard human-in-the-loop gate: the AI drafts the FEFO pick list, but any out-of-FEFO override must be reviewed and approved by a supervisor with a reason before it's committed.
- Duplicate guards so the same order line + lot allocation can't be processed twice.
Who it's for
Pickers who need to be told exactly which lot to grab, inventory control who own the on-hand accuracy, and quality teams who have to defend FEFO compliance and shelf-life commitments. If you run a warehouse with dated, lot-tracked stock and you're tired of expiry write-offs, this is for you.
You've got this - paste the first prompt and let the agent interview you.