OneSlate: Executive‑Focused Scheduling Platform Built in a Day
Use Claude for strategy and cowork for implementation; iterate with feature flags and real‑device testing to ship 14 features in a day.
Deploy the feature flag system to gate new mobile UI features to alpha users; verify on real devices; iterate before full rollout.
Summary
OneSlate is a scheduling platform that solves the problem of shared calendars polluting executive availability by filtering only primary or owned calendars into busy time calculations. The founder built the MVP in a single month using Next.js 14, Supabase, Tailwind CSS, and SWR, and leveraged Claude for design and cowork for implementation.
In a single day, 14 features were shipped, including a multi‑calendar event creation modal, public booking page bug fixes, a logged‑in viewer overlay, a mobile UI specification, and a lightweight feature‑flag system. The feature‑flag system uses a constant list of alpha emails and a FEATURE_FLAGS map to gate experimental mobile UI changes. OneSlate also introduced a logged‑in viewer feature that overlays a user’s calendars on another user’s booking page without OAuth, and a calendar_kind filter that excludes shared calendars from availability. The product supports multi‑account integration with Google and Microsoft and is hosted on Vercel. The founder’s workflow demonstrates rapid iteration by combining AI strategy, coding agents, real‑device testing, and phased feature rollout.
Key changes
- Introduced calendar_kind filter to exclude shared calendars from availability calculation
- Implemented logged‑in viewer feature that overlays user calendars on others' booking pages without OAuth
- Developed 14 features in a single day, including CreateEventModal, public booking page fixes, scheduling‑pages regression fix, mobile UI specs, and feature‑flag system
- Built a lightweight feature‑flag system with ALPHA_EMAILS and FEATURE_FLAGS constants
- Added mobile‑first UX with Next.js 14, Supabase, Tailwind CSS, and SWR
- Leveraged Claude for design and cowork for coding, enabling rapid iteration
- Integrated multi‑account support for Google and Microsoft calendars
- Created a mobile dashboard and team project UI with phased development