A library of worlds,
ready to query.
Every scenario ships with perfectly linked tables, an OSI semantic layer, and a generated REST + MCP interface. Pick one and start interacting — or download it as DuckDB.
▶ REPLAY Game of Life
Conway's automaton as a perfectly observable, deterministic grid world.
▶ REPLAY London Underground
A live tube graph — eleven lines, hundreds of trains, platforms held as a mutex.
▶ REPLAY Pac-Man
A self-playing arcade game — ghosts chase a flood-filled distance field.
Claims FNOL
First notice of loss through settlement, with capacity-capped regional adjusters.
Jaffle Shop
dbt's classic Jaffle Shop dataset, regenerated as a live simulation at any scale.
Payment Processor
A European processor — cross-border geographies routed onto SEPA, BACS and AUTOGIRO rails.
Online Shopping
Order fulfilment against live warehouse stock — confirmations, shipments and returns.
Service Queue
Bank-branch queueing — tellers, peak periods, and complexity-driven wait times.
Policy Servicing
High-volume service requests against a growing policy book and a fixed human team.
Submission Intake
The commercial submission-to-bind funnel — extraction, NIGO chase, referral, quote, bind.
Artisan Market
A craft marketplace where every string field is generated by faker.
Programmatic Ads
A real-time-bidding exchange — publishers, slots, bids, impressions and clicks.
▶ REPLAY Tiger POMDP
The canonical POMDP — a hidden tiger, noisy growls, a finite-memory policy.
Cliff Walking
Sutton & Barto's cliff-walking gridworld — three policies, one dangerous edge.
▶ REPLAY Recycling Robot
Sutton & Barto's recycling robot — search, wait or recharge under a battery MDP.
▶ REPLAY Thermostat
A continuous-state HVAC MDP — real-valued temperature, threshold control, noisy dynamics.
▶ REPLAY Prisoner's Dilemma
Iterated Prisoner's Dilemma with truly simultaneous, synchronous moves.
PageRank
PageRank as a random surfer — one six-page graph, three damping factors.
▶ REPLAY GTM Sales Funnel
Opportunities through a B2B SaaS funnel, with capacity-capped reps and solutions engineers.
▶ REPLAY Service Desk
SaaS support tickets through triage and a capacity-capped agent pool to resolution.
▶ REPLAY Turing — First Example
Turing's 1936 first machine — prints 0 1 0 1 … rightward forever, never halting.
▶ REPLAY Turing — Second Example
Turing's 1936 second machine — prints growing blocks of 1s by copying the last block and adding one.
▶ REPLAY Palindrome Recogniser
A decider that erases matching ends and sweeps inward — halting in Accept or Reject.
▶ REPLAY Wolfram (2,3) Universal Machine
Wolfram's 2-state, 3-symbol machine — proved universal in 2007 — running on an infinite alternating tape.
▶ REPLAY Rogozhin (4,6) Universal Machine
Rogozhin's 4-state, 6-symbol universal Turing machine (1996), running on a self-growing tape.
▶ REPLAY Minsky (7,4) Universal Machine
Marvin Minsky's 7-state, 4-symbol universal Turing machine (1967), halting on a demo input.
ERP General Ledger
A multi-subsidiary, multi-currency general ledger, generated by simulating ERP postings.
Single Data Table
One passive Person table that shows off the faker data generators.
Football League
A matchday weekend of league football — staggered kickoffs, minute-by-minute goals, and a league table kept from result messages.
Manufacturing Line
A machine shop's order book — staggered releases, hour-by-hour production, spawned quality inspections, and rework/MRB loops.
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