# AIMEAT Codebase Analysis Report

**Date:** 2026-03-12
**Version:** 1.2.0
**Stack:** Node.js 24.x, Express 5.2.1, TypeScript 5.9.3, Preact + HTM (no build step)

---

## Executive Summary

The AIMEAT Protocol reference implementation is a large-scale (~80K LOC backend, ~35K LOC frontend) Node.js/TypeScript server with strong architectural fundamentals. The codebase demonstrates professional-grade patterns: strict TypeScript, proper dependency injection, comprehensive storage abstraction, and solid security practices.

### Overall Rating: **8.5 / 10**

| Dimension | Rating | Summary |
|-----------|--------|---------|
| Architecture | 9/10 | Clean separation, modular design, proper abstractions |
| Code Quality | 8/10 | Strong patterns, some large functions need refactoring |
| Security | 8.5/10 | Excellent auth, input validation, CSP; minor gaps in distributed concerns |
| Frontend | 8/10 | Well-organized SPA, proper XSS prevention, good component patterns |
| Testing | 7.5/10 | Good E2E and unit coverage, missing CI/CD, some gaps in error cases |
| Documentation | 8/10 | Comprehensive OpenAPI spec and CLAUDE.md, missing architecture diagrams |

### Key Strengths

- **Zero critical vulnerabilities** found across entire codebase
- **EdDSA (Ed25519)** JWT authentication with session-aware revocation
- **Parameterized queries** throughout — no SQL injection risk
- **Strict TypeScript** with ~95% type safety
- **Pluggable storage** (Memory, SQLite, MongoDB) with clean abstraction
- **288 configuration fields** with multi-source priority (CLI > DB > Consul > File > Env > Defaults)
- **GDPR compliance** with export, delete, consent management, and audit trails
- **Rate limiting** with role-based multipliers and per-endpoint configuration

### Key Risks

- No distributed rate limiting for multi-node deployments
- CSP allows `style-src 'unsafe-inline'` (should use nonce)
- No CI/CD pipeline configured
- Some 300+ LOC functions with high cyclomatic complexity
- Silent error swallowing in federation sync paths

---

## Report Structure

| Document | Contents |
|----------|----------|
| [01-architecture.md](01-architecture.md) | System architecture, module organization, data flow |
| [02-code-quality.md](02-code-quality.md) | Code patterns, complexity, duplication, type safety |
| [03-security.md](03-security.md) | Authentication, authorization, XSS, CSRF, injection, GDPR |
| [04-frontend.md](04-frontend.md) | Frontend architecture, component quality, client-side security |
| [05-testing.md](05-testing.md) | Test coverage, quality, API specification analysis |
| [06-recommendations.md](06-recommendations.md) | Prioritized action items |

---

## Scope

This analysis covers:
- All TypeScript source files in `aimeat/src/` (224 files)
- All frontend files in `aimeat/public/` (101 JS files, 4 HTML files, 12 CSS files)
- Test suite (`test/` — 67 test files)
- OpenAPI specification (`openapi.yaml` — 10,665 lines, 196 paths, 235 operations)
- Configuration system (288 fields across 8 subsystems)
- Dependencies (`package.json` — 35+ runtime, 15+ dev dependencies)

## Metrics

```
Backend TypeScript Files:       224
Backend Lines of Code:          ~80,000
Frontend JS Files:              101
Frontend Lines of Code:         ~35,000
API Routes:                     60+ files
Services:                       70+ files
Storage Repositories:           40+ files
Config Fields:                  288
OpenAPI Paths:                  196
OpenAPI Operations:             235
Test Files:                     67
Unit Tests:                     44 files
E2E Tests:                      19 suites (127+ cases in main suite)
Locales:                        2 (English, Finnish)
```
