A demo app built with Elements.
Volunteers pick up shifts with live spots left, waitlists and day-before reminders; coordinators set weekly shifts, check people in and export hours.
Demo: Rostergrove
- Agent: Claude Code, Opus 5.5 Medium
- Time: 18 min
- Cost: $5.88 at API rates, September 2026
elements create rostergrove -scaffold=elementscode/demo-rostergroveRostergrove needed shifts with spots that count down as volunteers sign up, waitlists that move people up, day-before reminders, check-in and an hours report for the coordinator. Each of those is a part of Elements, so the agent spent its 18 minutes on the food bank's roster itself.
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Live spots and rosters. Shifts, signups and the coordinator's roster are LiveTables. Spots left change the moment someone signs up, and the roster fills in and checks off as people arrive.
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Waitlists that move people up. Signing up locks the shift first, so the last spot goes to exactly one volunteer and a full shift puts the next one on the waitlist. When someone with a spot leaves, whoever has waited longest is confirmed.
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Day-before reminders. A one-line cron schedule runs a job every hour that emails each confirmed volunteer the day before their shift, in the food bank's time zone, and marks each one as sent.
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Weekly shifts and hours. A coordinator adds a shift once or every week for a set number of weeks, and downloads each volunteer's checked-in hours for the year as a CSV.
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Server calls as function calls. Signing up, leaving, check-in and cancelling a shift call server functions straight from the page with
@rpc. -
Data and roles from SQL. Migrations define the roster and seed one coordinator, fifteen volunteers, sixteen weeks of past shifts with hours served and two weeks of upcoming shifts with signups. Sessions and roles give coordinators check-in and the admin pages.
The project server runs alongside the agent and answers as soon as a file is saved: it type-checks the templates, TypeScript and SQL, applies migrations and reruns the tests, so every question came back right away and the agent kept building.
The app type-checks with zero errors and all 31 tests pass. Every page works on desktop and phone.
The seed creates a food bank's weekly schedule of sorting, packing and delivery driver shifts: sixteen weeks of past shifts with checked-in hours, and the next two weeks with signups, where some shifts are full with a waitlist and some are short of volunteers. The sign-in page lists every account; tap one to sign in.
| Role | Password | |
|---|---|---|
| coordinator@rostergrove.org | coordinator | coordinator |
| maya@example.org | volunteer | volunteer |
| luis@example.org | volunteer | volunteer |
| priya@example.org | volunteer | volunteer |
Twelve more volunteers (tom, aisha, ben, grace, sam, rosa, kwame, hannah,
diego, ellie, marcus and nora, all @example.org) share the volunteer
password.
Reminder emails go to the log in development. To send tomorrow's reminders
now, run elements run scripts/send-reminders.ts.
Demo: Rostergrove
MIT. See LICENSE.