How this demo works
Every sample below is JSON on this server . Click a row to open the right viewer with that file already loaded. The public demo is browse-first : live Run a scenario needs an operator API key (or run locally with pip install fragility-engine).
Full map of pages and viewers: Demo guide · CLI tutorials: How to Use · Policy: Demo guardrails
Fragility Discovery Engine
Search for fragile conditions in toy institutional simulations, then inspect replays, trade-off charts, and attribution paths.
Replay viewer
Pareto viewer
Attribution viewer
Composite viewer
Past server runs
Step-by-step replays
Scrub timelines of collapse. Opens in the replay viewer .
Sample Domain Open
Flagship benchmark
Aggregate peg
Replay
Aggregate peg
Stablecoin reserves
Replay
Network contagion
32-node graph
Replay
Resource cascade
Dual capacity layers
Replay
Service backlog
Queue vs processing
Replay
Liquidity ladder
Margin stress
Replay
Inventory buffer
Stock level
Replay
Attack trade-off charts (Pareto)
Severity vs attack cost. Opens in the Pareto viewer . Co-evolution runs on Run a scenario produce fresh charts under /runs/<id>/.
Sample Domain Open
Aggregate peg frontier
Charter
Chart
Network contagion
Charter
Chart
Resource cascade
Charter
Chart
Service backlog
Charter
Chart
Liquidity ladder
Charter
Chart
Inventory buffer
Charter
Chart
Attribution and mutation chains
Counterfactuals and stepwise interventions. Opens in the attribution viewer .
Multi-domain composite
One attack genome evaluated on several domains. Opens in the composite viewer (use Presets for twin through hexa).
Sample Domains Open
Hexa composite
All six charter domains
Composite
Preset gallery
Twin · triple · quad · penta · hexa
Composite viewer
Research fork — coupled institution
Peg panic and overload exchange signals inside one simulation step (not the six-domain charter). Opt-in backlog tetra adds liquidity + backlog channels. Policy: Coupled fork notes · raw JSON bundle: coupled_fork_demo .
Operator Intelligence Shorthand
Verified CLI capsules for operators — goldens and certificates dispose; LLM output never enters World.step. Full map: Intelligence Shorthand .
Capsule What it does CLI
coupled-tetra-search
Pinned tetra GA/MC search goldens
fragility shorthand resolve coupled-tetra-search
coupled-worth-it
Two-scalar / triad / tetra worth-it bar
fragility shorthand resolve coupled-worth-it
certify-flagship
Flagship certificate with fork digests
fragility shorthand resolve certify-flagship
List all
Operator task ladder
fragility shorthand list