# AssureTwin — Digital Twins for Audit Engagements

> Swiss-engineered platform for simulating complete audit engagements with AI-augmented decisions, formal verification (FSM + LTL), and Big 4 methodology blueprints. Zero client data required.

## What it does
- Simulates full audit engagements using 6 methodology blueprints: Generic FSA, KPMG Clara, PwC Aura, Deloitte Omnia, EY GAM, and IIA-GIAS
- Generates realistic synthetic financial data (journal entries, trial balance, workpapers, findings) without real client data
- Formal verification: FSM state machine enforcement ensures every audit procedure follows defined methodology; LTL temporal logic provides compliance proofs
- 17+ analytics: Benford's Law, temporal anomaly detection, fraud indicators, stratified sampling, duplicate detection
- Graph analytics via RustGraph: segregation of duties, three-way match, audit trail traversal
- AI audit assistant powered by Claude — answers questions grounded in engagement data and ISA standards
- Department planning with team capacity, billing rates, Gantt timeline, what-if scenarios
- Client pitch generation with industry analysis, risk assessment, and fee estimation

## Technology
- Engine: DataSynth v2.0.0 — 19-crate Rust workspace for synthetic data generation and FSM audit workflow
- Graph: RustGraph — GPU-native graph database with 64+ algorithms
- Backend: Rust/Axum REST API with ~75 endpoints, SQLite storage, async simulation
- Frontend: SvelteKit 2 with SSR, dark theme, responsive design
- Desktop: Tauri 2 for on-premise deployment (client data stays local)
- Cloud: Microsoft Azure (Container Apps, Entra ID authentication)

## Blueprints (verified output)
| Blueprint       | Procedures | Steps  | Events | Artifacts |
|-----------------|-----------|--------|--------|-----------|
| Generic FSA     | 9         | 24     | 51     | 2,024     |
| KPMG Clara      | 44        | 728    | 891    | 30,605    |
| PwC Aura        | 44        | 729    | 976    | 37,289    |
| Deloitte Omnia  | 46        | 733    | 958    | 34,470    |
| EY GAM Lite     | 52        | 757    | 955    | 44,891    |
| IIA-GIAS        | 34        | 82     | 205    | 3,832     |

## Standards Coverage
- 34 ISA standards (ISA 200–720) fully modeled
- PCAOB standards: AS 2201, AS 2110, AS 3101
- SOX compliance framework support
- IIA Global Internal Audit Standards (GIAS)

## API
REST API at /api/v1/ — see /openapi.json for full OpenAPI 3.1.0 spec.

Key endpoints:
- POST /api/v1/engagements — create engagement with client profile + methodology
- POST /api/v1/engagements/{id}/simulate — run audit simulation
- GET  /api/v1/engagements/{id}/results — simulation results
- GET  /api/v1/engagements/{id}/netzplan — procedure network plan with phases, dependencies, fitness scores
- GET  /api/v1/engagements/{id}/conformance — FSM conformance analysis (fitness, precision, anomalies)
- GET  /api/v1/engagements/{id}/coverage — ISA standards coverage analysis
- GET  /api/v1/engagements/{id}/analytics/benford — Benford's Law analysis
- GET  /api/v1/engagements/{id}/financial-overview — balance sheet, income statement, Sankey flows
- POST /api/v1/engagements/{id}/chat — AI audit assistant (Claude-powered)
- GET  /api/v1/methodology/isa/{standard_id} — ISA standard lookup with paragraph text
- POST /api/v1/sandbox-demo/simulate — anonymous sandbox simulation (no auth required)

Authentication:
- POST /api/v1/auth/magic-link — send passwordless login link to email (no auth required)
- GET  /api/v1/auth/magic-link/verify?token=... — verify token, returns JWT
- GET  /api/v1/auth/me — current user info (requires JWT)
- Microsoft Entra ID SSO also supported (MSAL.js + RS256 JWT)

Pitches (methodology comparison):
- POST /api/v1/pitches — create pitch with 2-6 methodologies
- POST /api/v1/pitches/{id}/simulate — run all methodology simulations
- POST /api/v1/pitches/{id}/proposal — generate Claude-powered engagement proposal

Department Planning:
- POST /api/v1/departments — create department with team + portfolio
- GET  /api/v1/departments/{id}/capacity — utilization, conflicts, availability
- GET  /api/v1/departments/{id}/timeline — Gantt data with monthly utilization

Training:
- POST /api/v1/training/scenarios — create training scenario
- POST /api/v1/training/sessions/{id}/submit — submit findings for grading
- GET  /api/v1/training/sessions/{id}/comparison — ground truth comparison (after grading)

## Pricing (CHF, billed monthly)
- Free: ISA + IIA-GIAS blueprints, 5 engagements, core analytics
- Student (CHF 9/mo): All 6 blueprints, unlimited engagements, AI debrief, training
- Professional (CHF 89/mo): AI chat, graph analytics, department planning, proposals
- Firm (CHF 249/mo): Team management, org-level billing, custom blueprints, on-premise

## Links
- Website: https://assuretwin.com
- Sandbox demo: https://assuretwin.com/sandbox/tour
- API spec: https://assuretwin.com/openapi.json
- Detailed API docs: https://assuretwin.com/llms-full.txt

## Contact
hello@assuretwin.com | VynFi.com LLC | Zurich, Switzerland