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Format Lab
Design your own fantasy format. Save it. Run leagues on it.
My templates
⭐ Keeper Dome Classic
Last edited Sep 2, 2026
12-team superflex dynasty best ball. 30 rosters, 3 taxi, 3 IR, FAAB waivers, 5-round rookie slow drafts, picks tradeable 3 years out.
⭐ I Play For Keepers — House Format
Last edited Nov 1, 2026
The flagship custom format. Keeper economics, escalating contracts, and custom win conditions. Rules in progress — define them in the builder.
Vampire Best Ball
Last edited Oct 12, 2026
One team starts with no draft picks and builds only through waivers and trades. Everyone else plays best ball. Chaos by design.
Create custom format
1Identity
2Roster rules
3Lineup
A second QB-eligible flex slot
Engine auto-starts the optimal legal lineup
4Keeper rules
Contract years & salary escalators — design TBD
5Scoring
6Standings & win conditions
Each week, your score plays every team
Custom win conditions compile to rules-engine hooks (placeholder).
7Playoffs
Last seed goes to highest PF among the rest
8Draft
Email-draft style, multi-day
9Picks
10Waivers
If bid A fails, try bid B
Templates are stored as structured rules (format_templates) — the same engine that runs The Keeper Dome will run yours.