Mock mode. No model calls are made: any upload maps to the trig sample and games come from recorded fixtures. See FIRST_RUN.md step 3 to go live.

Teaching-mechanic library

Every card is a concept-specific configuration of one mechanic family. Cards are data; families are engine code. A card is playable as soon as its family·mode is implemented.

Cards
316
Playable now
303
Flagships
13
Families
14
Modes
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8 cards

Replication Chamber

playable

replication_chamber · math · simulator.reach_state

Concept: Exponential growth

Player does: Set the growth factor so the colony hits the target on day n

Breaks: Exponential growth is fast linear growth

Exponential growth multiplies by a constant factor each step, which eventually outpaces any linear growth no matter how fast.

Inheritance Machine

playable

inheritance_machine · math · simulator.reach_state

Concept: Recursive sequences

Player does: Set a₁ and the rule so generation 5 matches

Breaks: Recursive and explicit rules can't describe the same sequence

A recursive rule and an explicit formula can generate exactly the same sequence, just computed differently.

Repeat Experiment

playable

repeat_experiment · math · simulator.sample

Concept: Variability

Player does: Rerun the identical experiment; predict the spread

Breaks: Same setup, same result

Random variation means identical setups can still produce different results from trial to trial.

Prediction Stabilizer

playable

prediction_stabilizer · math · simulator.sample

Concept: Law of large numbers

Player does: Choose how many trials until the estimate stays in the band

Breaks: After five heads, tails is due

Independent trials have no memory, so past outcomes don't change future odds; the law of large numbers only stabilizes averages over many trials.

Long-Run Casino

playable

long_run_casino · math · simulator.sample

Concept: Expected value

Player does: Pick the table with the best long-run payoff, then watch 1,000 plays

Breaks: The biggest prize is the best bet

Expected value weighs each payoff by its probability, so a rare huge prize can still be a worse bet than a smaller frequent one.

Population Collector

playable

population_collector · math · simulator.sample

Concept: Sampling bias

Player does: Sample only reachable districts; explain why the estimate drifts

Breaks: A bigger biased sample fixes the bias

A biased sampling method stays biased no matter how large the sample gets; only fixing the method removes the bias.

Capture the Parameter

playable

capture_the_parameter · math · simulator.sample

Concept: Confidence intervals

Player does: Throw interval nets; predict how many catch the hidden true value

Breaks: There's a 95% chance this one interval holds the value

A 95% confidence level describes the method's long-run capture rate across many intervals, not the chance for one already-computed interval.

Odds Forge

playable

odds_forge · math · simulator.sample

Concept: Probability & counting

Player does: Choose the fork with the best odds of loot

Breaks: Two outcomes means 50/50

Probability depends on how many ways each outcome can occur, not just how many outcomes are listed.

Family × genre adapters

Which socket each family mounts on in each genre (LIBRARY §5). The boss socket is always allowed. Hosts built tonight: dungeon, mystery, platformer.

FamilyDungeon crawler
boss: boss
Investigation adventure
boss: accusation
Side-view obstacle course
boss: boss
Grid puzzle / escape room
boss: boss
Management sim
boss: crisis
Truth Finder
chest / boss
Treasure chests; the one bearing the false claim is a mimic
cross_exam / accusation
One witness's claim contradicts the facts; object to the lie
gate / boss
Three doors; the one with the false claim collapses
tile_board / boss
Remove the odd tile to release the chain
event_card / crisis
Advisors' claims; the false one tanks a stat
Sequencer
door / boss
Glyph door pressed in process order
corkboard / accusation
Rebuild the timeline on the corkboard
gap / boss
Bridge planks in order; the wrong order leaves a gap
conveyor / boss
Order the parcels on the conveyor
research_node / crisis
Tech tree order
Tuner
door / boss
Vault rings, catapult, or alchemy dials spinning on the function
lab / accusation
Calibrate the instrument; set the lighthouse sweep
moving_platform / gate / boss
Saw wheels, launch pads, a balloon that only lifts when tuned
lock / beam_board / boss
Dial locks and gear trains
policy_dial / production_line / crisis
Machine settings on the production line
Mapper
altar / enemy / boss
Rune line on the altar floor, or an archery range on a number line
conversation / accusation
At the auction, bid the right magnitude; pin the map
gap / boss
The floor is a number line; land on the value
tile_board / boss
Place the tile at its position on the axis
market / crisis
Place goods on the price line
Sorter
enemy / boss
Type-matched weapons; category-keyed doors
evidence / accusation
File claims into case folders
gate / boss
Only matching-category platforms are solid
goal_pad / boss
Push crates onto category pads
market / crisis
Route goods to districts
Linker
enemy / boss
Chain lightning between pairs
corkboard / accusation
String the board
pickup / boss
Grapple anchors
pipe_board / boss
Flow-style pairing
research_node / crisis
Supply links
Investigator
door / boss
Rooms are hypotheses; clues seal their doors
accusation / corkboard
Pin clues, eliminate suspects, accuse
gate / boss
Clues seal the doors of eliminated hypotheses
tile_board / boss
Logic grid
event_card / crisis
Policy debate with evidence
Function World
altar / boss
Rune track whose floor height is f(x)
lab / accusation
Sensor readings converging on a timestamp
gap / boss
The terrain is y = f(x); the missing tile
tile_board / boss
Track tiles that follow f
market / crisis
Price curve over time
Balance
altar / boss
Alchemy scale; spilled atoms become slimes
archive / accusation
The ledger is off by one entry
switch / boss
Seesaw bridge
lock / boss
Cancel terms, DragonBox-style
ledger / crisis
Balance budgets and flows
Simulator
enemy / boss
Ecology rooms, reactor waves
lab / accusation
Keep the patient stable overnight
moving_platform / boss
Population or glucose lifts
beam_board / boss
Place species so all are fed
crisis / policy_dial
Run the economy or ecosystem
Builder
forge / boss
Craft a molecule, circuit, or golem program
lab / accusation
Build the compound or circuit
switch / boss
Wire the elevator; word-block bridge
tile_board / boss
Valence grid, Lightbot
production_line / crisis
Lay out the factory
Transformer
forge / boss
Crafting-bench machines
lab / accusation
Decode the letter or cipher
pickup / gate / boss
Power-up machine, cipher platforms
conveyor / pipe_board / boss
Route through machines
production_line / crisis
Processing chain
Accumulator
forge / boss
Fill the reservoir to forge the key
archive / accusation
Rebuild totals from rate logs
gap / boss
Fill the pit; velocity ghost
conveyor / boss
Fill tanks
production_line / crisis
Output over time
Recall
enemy / boss
Spells are flashcards, cooldowns are spacing
conversation / accusation
Riddle-keeper interrogation
pickup / boss
Type the term to double-jump
tile_board / boss
Timed word tiles
research_node / crisis
Quick recall boosts research