Pro se litigants walk into court with zero practice — they don't know what to say, how to address the judge, or what to expect. The courtroom is terrifying and unfamiliar. There is no safe space to rehearse, make mistakes, and learn the unwritten rules before facing a real judge.
A full courtroom simulation with AI-powered role-play (judge, opposing counsel), real-time feedback, outcome prediction, and customizable scenarios. Users rehearse hearings in a realistic but forgiving environment so they walk into the real courtroom prepared and confident.
flowchart LR
A[Scenario Selector] --> B[Courtroom Environment]
B --> B1[Virtual Courtroom]
B --> B2[Participant Roles]
B --> C[AI Actors]
C --> C1[Judge AI]
C --> C2[Opposing Counsel AI]
C --> C3[Witness AI]
C --> D[Interaction Engine]
D --> D1[Speech/Text Input]
D --> D2[Turn Management]
D --> E[Feedback Engine]
E --> E1[Real-time Coaching]
E --> E2[Scoring]
E --> F[Outcome Predictor]
F --> G[Performance Report]
- Pro se litigants — rehearse before the real thing
- Law students — practice courtroom skills in a safe environment
- Legal aid training programs — train advocates with realistic simulations
- Court self-help centers — offer preparation tools to unrepresented parties
- AI-powered judge and opposing counsel — realistic courtroom dialogue driven by language models
- Customizable hearing scenarios — custody, eviction, small claims, protective orders, and more
- Real-time courtroom etiquette feedback — learn what to say, when to stand, and how to address the court
- Outcome prediction based on performance — see how your presentation affects likely outcomes
- "Replay and improve" mode — rerun the same scenario and beat your previous score
- Performance scoring and improvement tracking — track growth across sessions with detailed rubrics
npm install @justice-os/court-sandboximport { Courtroom, ScenarioLoader, JudgeAI } from '@justice-os/court-sandbox';
// Load a custody hearing scenario
const scenario = await ScenarioLoader.load('custody-hearing');
// Create the courtroom session
const courtroom = new Courtroom({
scenario,
difficulty: 'beginner',
feedbackLevel: 'verbose',
});
// Start the simulation
const session = await courtroom.startSession();
// The AI judge opens the hearing
const opening = await session.nextTurn();
console.log(`Judge: ${opening.dialogue}`);
// User responds
const feedback = await session.submitResponse({
text: 'Good morning, Your Honor. I am here regarding the custody matter.',
participantId: 'user',
});
console.log(`Etiquette Score: ${feedback.etiquetteScore}/10`);
console.log(`Coaching Tip: ${feedback.tip}`);- Voice input with speech-to-text for realistic oral arguments
- Multiplayer mode for moot court practice with real participants
- VR courtroom environment for immersive preparation
- Jurisdiction-specific courtroom rules and procedures
- Integration with justice-navigator for scenario recommendations
- Exportable preparation reports for legal aid advocates
src/
├── index.ts
├── simulation/
│ ├── courtroom.ts # Courtroom class — session management
│ ├── scenario-loader.ts # ScenarioLoader — load hearing types
│ └── turn-manager.ts # TurnManager — who speaks when
├── actors/
│ ├── judge-ai.ts # JudgeAI — rulings, questions, demeanor
│ ├── opposing-counsel-ai.ts # OpposingCounselAI — objections, arguments
│ └── actor-base.ts # BaseActor — shared AI behavior
├── feedback/
│ ├── coach.ts # RealtimeCoach — etiquette, strategy tips
│ ├── scorer.ts # PerformanceScorer — scoring rubric
│ └── outcome-predictor.ts # OutcomePredictor — likelihood estimation
├── scenarios/
│ └── README.md # How to create custom scenarios
├── components/
│ ├── CourtroomView.tsx # Visual courtroom layout
│ ├── DialogueBox.tsx # Conversation interface
│ └── ScoreCard.tsx # Performance display
└── types/
└── index.ts
This repository is part of the Justice OS open-source ecosystem — 32 interconnected projects building the infrastructure for accessible justice technology.
| Repository | Description |
|---|---|
| justice-os | Core modular platform — the foundation |
| justice-api-gateway | Interoperability layer for courts |
| legal-identity-layer | Universal legal identity and auth |
| case-continuity-engine | Never lose case history across systems |
| offline-justice-sync | Works without internet — local-first sync |
| Repository | Description |
|---|---|
| justice-navigator | Google Maps for legal problems |
| mobile-court-access | Mobile-first court access kit |
| cognitive-load-ui | Design system for stressed users |
| multilingual-justice | Real-time legal translation |
| voice-legal-interface | Justice without reading or typing |
| legal-plain-language | Turn legalese into human language |
| Repository | Description |
|---|---|
| vetted-legal-ai | RAG engine with citation validation |
| justice-knowledge-graph | Open data layer for laws and procedures |
| legal-ai-guardrails | AI safety SDK for justice use |
| emotional-intelligence-ai | Reduce conflict, improve outcomes |
| ai-reasoning-engine | Show your work for AI decisions |
| Repository | Description |
|---|---|
| evidence-vault | Privacy-first secure evidence storage |
| court-notification-engine | Smart deadline and hearing alerts |
| justice-analytics | Bias detection and disparity dashboards |
| evidence-timeline | Evidence timeline builder |
| Repository | Description |
|---|---|
| court-doc-engine | TurboTax for legal filings |
| justice-workflow-engine | Zapier for legal processes |
| pro-se-toolkit | Self-represented litigant tools |
| justice-score-engine | Access-to-justice measurement |
| justice-app-generator | No-code builder for justice tools |
| Repository | Description |
|---|---|
| justice-persona-simulator | Test products against real human realities |
| justice-experiment-lab | A/B testing for justice outcomes |
| Repository | Description |
|---|---|
| digital-literacy-sim | Digital literacy simulator |
| legal-resource-discovery | Find the right help instantly |
| court-simulation-sandbox | Practice before the real thing |
| justice-components | Reusable component library |
| justice-dev-starter-kit | Ultimate boilerplate for justice tech builders |
Built with purpose. Open by design. Justice for all.
This project is provided for informational and educational purposes only and does not constitute legal advice, legal representation, or an attorney-client relationship. No warranty is made regarding accuracy, completeness, or fitness for any particular legal matter. Always consult a licensed attorney in your jurisdiction before making legal decisions. Use of this software does not create any professional-client relationship.
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