CODITECT Development Studio - Architecture Requirements Document (ARD)
Version: 1.0.0
Date: 2026-01-31
Status: Draft
1. Introduction
1.1 Purpose
This document defines the architectural requirements for the CODITECT Development Studio, a browser-based thin client for the CODITECT multi-agent AI platform. It specifies functional and non-functional requirements, constraints, and quality attributes.
1.2 Scope
- In Scope: Web-based thin client architecture, multi-tenancy, session management, multi-LLM orchestration
- Out of Scope: Native mobile apps, on-premises deployment, third-party marketplace integrations
1.3 Definitions
| Term | Definition |
|---|---|
| ARD | Architecture Requirements Document |
| NFR | Non-Functional Requirement |
| FR | Functional Requirement |
| QoS | Quality of Service |
| RTO | Recovery Time Objective |
| RPO | Recovery Point Objective |
2. Stakeholder Requirements
2.1 Stakeholder Matrix
| Stakeholder | Concerns | Priority |
|---|---|---|
| End Users | Performance, reliability, ease of use | Critical |
| Enterprise Customers | Security, compliance, multi-tenancy | Critical |
| Platform Team | Scalability, maintainability, cost | High |
| Security Team | Authentication, authorization, audit | Critical |
| Operations | Monitoring, alerting, deployment | High |
| Executive | Time to market, competitive advantage | Medium |
2.2 User Personas
Persona 1: Senior Developer (Alex)
- Role: Full-stack developer at mid-size tech company
- Needs: Fast session startup, familiar IDE experience, multiple projects
- Pain Points: Context switching between tools, slow environment setup
- Requirements: Keyboard shortcuts, dark theme, file tree navigation
Persona 2: Engineering Manager (Maria)
- Role: Lead of 20-person engineering team
- Needs: Team oversight, resource management, cost control
- Pain Points: No visibility into team usage, unpredictable costs
- Requirements: Team dashboards, usage analytics, budget alerts
Persona 3: Enterprise Architect (James)
- Role: Architect at Fortune 500 company
- Needs: Compliance, security, integration with existing systems
- Pain Points: Shadow IT, data governance, audit trails
- Requirements: SSO, audit logs, data residency, VPC integration
3. Functional Requirements
3.1 Authentication & Authorization
| ID | Requirement | Priority | Acceptance Criteria |
|---|---|---|---|
| FR-AUTH-001 | Support SSO via SAML 2.0 | Critical | Integration with Okta, Azure AD, Auth0 |
| FR-AUTH-002 | Support SSO via OIDC | Critical | OAuth 2.0 / OpenID Connect support |
| FR-AUTH-003 | API key authentication | High | Programmatic access for CI/CD |
| FR-AUTH-004 | Multi-factor authentication | High | TOTP, WebAuthn support |
| FR-AUTH-005 | Role-based access control | Critical | Admin, Developer, Viewer roles |
| FR-AUTH-006 | Resource-level permissions | High | Per-project, per-file access control |
| FR-AUTH-007 | Session timeout management | Medium | Configurable idle timeout |
| FR-AUTH-008 | Concurrent session limits | Medium | Per-user session quotas |
3.2 Multi-Tenancy
| ID | Requirement | Priority | Acceptance Criteria |
|---|---|---|---|
| FR-MT-001 | Organization isolation | Critical | Data segregation between orgs |
| FR-MT-002 | Team workspaces | Critical | Sub-organization team structure |
| FR-MT-003 | Project isolation | Critical | Per-project resource boundaries |
| FR-MT-004 | Custom branding | Medium | Logo, colors per organization |
| FR-MT-005 | Organization-specific settings | Medium | Default providers, quotas |
| FR-MT-006 | Cross-team collaboration | Low | Share sessions across teams |
| FR-MT-007 | Resource quotas per org | High | CPU, memory, storage limits |
| FR-MT-008 | Billing per organization | High | Usage tracking and invoicing |
3.3 Session Management
| ID | Requirement | Priority | Acceptance Criteria |
|---|---|---|---|
| FR-SESS-001 | Ephemeral sandbox creation | Critical | < 10 seconds from request to ready |
| FR-SESS-002 | Session persistence | Critical | Resume session after browser close |
| FR-SESS-003 | Session sharing | High | Share session URL with team |
| FR-SESS-004 | Session recording | Medium | Replay session interactions |
| FR-SESS-005 | Idle timeout | High | Auto-terminate after inactivity |
| FR-SESS-006 | Maximum session duration | Medium | Hard limit (e.g., 8 hours) |
| FR-SESS-007 | Session checkpointing | Critical | Manual and auto-save state |
| FR-SESS-008 | Session restoration | Critical | Restore from any checkpoint |
| FR-SESS-009 | Multiple concurrent sessions | High | User can have 3+ active sessions |
| FR-SESS-010 | Session transfer | Low | Move session to different region |
3.4 Chat & Agent Interface
| ID | Requirement | Priority | Acceptance Criteria |
|---|---|---|---|
| FR-CHAT-001 | Real-time chat | Critical | WebSocket streaming < 100ms latency |
| FR-CHAT-002 | Multi-provider support | Critical | Claude, Gemini, Codex, Kimi |
| FR-CHAT-003 | Provider selection | High | User can choose preferred provider |
| FR-CHAT-004 | Automatic failover | High | Switch provider on failure |
| FR-CHAT-005 | Message history | Critical | Persistent chat logs |
| FR-CHAT-006 | Code block rendering | High | Syntax highlighting, copy button |
| FR-CHAT-007 | File attachments | Medium | Upload/download in chat |
| FR-CHAT-008 | Tool call visualization | Medium | Show tool execution progress |
| FR-CHAT-009 | Message search | Medium | Full-text search across history |
| FR-CHAT-010 | Export conversation | Low | PDF, Markdown export |
3.5 File Management
| ID | Requirement | Priority | Acceptance Criteria |
|---|---|---|---|
| FR-FILE-001 | File tree navigation | Critical | Explorer sidebar with collapse/expand |
| FR-FILE-002 | File editing | Critical | Monaco/CodeMirror integration |
| FR-FILE-003 | Syntax highlighting | Critical | Support 50+ languages |
| FR-FILE-004 | Auto-save | High | Save on type debounce |
| FR-FILE-005 | File search | High | Global search across project |
| FR-FILE-006 | File upload/download | High | Drag & drop, multi-file |
| FR-FILE-007 | Git integration | Critical | Show git status, diff, blame |
| FR-FILE-008 | Terminal access | High | Embedded terminal in sandbox |
| FR-FILE-009 | Collaborative editing | Medium | Real-time multi-user editing |
| FR-FILE-010 | File versioning | Medium | View previous versions |
3.6 Visualization
| ID | Requirement | Priority | Acceptance Criteria |
|---|---|---|---|
| FR-VIZ-001 | Workflow diagrams | High | Mermaid.js integration |
| FR-VIZ-002 | Architecture diagrams | High | C4 model rendering |
| FR-VIZ-003 | Pitch deck viewer | Medium | Slide presentation mode |
| FR-VIZ-004 | Data visualization | Medium | Charts, graphs (Recharts/D3) |
| FR-VIZ-005 | Fullscreen mode | Medium | Expand visualization to full screen |
| FR-VIZ-006 | Export visualization | Low | PNG, SVG, PDF export |
3.7 State Backup & Recovery
| ID | Requirement | Priority | Acceptance Criteria |
|---|---|---|---|
| FR-BACKUP-001 | Automatic checkpoints | Critical | Every 5 minutes or N changes |
| FR-BACKUP-002 | Manual checkpoint | High | User-triggered save |
| FR-BACKUP-003 | Git integration | Critical | Push to GitHub/GitLab |
| FR-BACKUP-004 | Checkpoint listing | High | Browse all checkpoints |
| FR-BACKUP-005 | Point-in-time restore | Critical | Restore any checkpoint |
| FR-BACKUP-006 | Cross-region backup | Medium | Replicate to secondary region |
| FR-BACKUP-007 | Backup encryption | Critical | AES-256 at rest |
| FR-BACKUP-008 | Retention policy | Medium | 30-day default, configurable |
4. Non-Functional Requirements
4.1 Performance
| ID | Requirement | Target | Measurement |
|---|---|---|---|
| NFR-PERF-001 | Page load time | < 2 seconds | Lighthouse TTI |
| NFR-PERF-002 | Time to interactive | < 3 seconds | Lighthouse TTI |
| NFR-PERF-003 | Session startup | < 10 seconds | API response time |
| NFR-PERF-004 | Chat response TTFB | < 1 second | First token received |
| NFR-PERF-005 | File list loading | < 500ms | API response time |
| NFR-PERF-006 | File save | < 1 second | API response time |
| NFR-PERF-007 | WebSocket latency | < 100ms | Ping/pong measurement |
| NFR-PERF-008 | Simultaneous users | 10,000 | Load testing |
| NFR-PERF-009 | Concurrent sessions | 5,000 | Per-region capacity |
| NFR-PERF-010 | LLM throughput | 1000 req/min | Per-provider quota |
4.2 Scalability
| ID | Requirement | Description |
|---|---|---|
| NFR-SCALE-001 | Horizontal scaling | Add workers without downtime |
| NFR-SCALE-002 | Auto-scaling | Scale based on queue depth |
| NFR-SCALE-003 | Database sharding | Tenant-aware sharding strategy |
| NFR-SCALE-004 | Stateless design | No session affinity required |
| NFR-SCALE-005 | Resource pooling | Shared sandbox pool |
| NFR-SCALE-006 | Multi-region | Deploy to 3+ regions |
| NFR-SCALE-007 | Storage scaling | Unlimited R2/GCS storage |
4.3 Availability & Reliability
| ID | Requirement | Target |
|---|---|---|
| NFR-AVAIL-001 | Uptime SLA | 99.9% monthly |
| NFR-AVAIL-002 | Scheduled maintenance | < 4 hours/month |
| NFR-AVAIL-003 | RTO (Recovery Time) | < 1 hour |
| NFR-AVAIL-004 | RPO (Recovery Point) | < 5 minutes |
| NFR-AVAIL-005 | Graceful degradation | Core features on partial outage |
| NFR-AVAIL-006 | Circuit breaker | Automatic failover |
| NFR-AVAIL-007 | Retry logic | Exponential backoff |
| NFR-AVAIL-008 | Health checks | /health endpoint |
4.4 Security
| ID | Requirement | Standard |
|---|---|---|
| NFR-SEC-001 | Data encryption in transit | TLS 1.3 |
| NFR-SEC-002 | Data encryption at rest | AES-256 |
| NFR-SEC-003 | Secret management | HashiCorp Vault / Cloudflare Secrets |
| NFR-SEC-004 | API security | OAuth 2.0, rate limiting |
| NFR-SEC-005 | Input validation | OWASP Top 10 protection |
| NFR-SEC-006 | XSS prevention | Content Security Policy |
| NFR-SEC-007 | CSRF protection | Token-based |
| NFR-SEC-008 | Dependency scanning | Snyk/Dependabot |
| NFR-SEC-009 | Container security | Distroless images, non-root |
| NFR-SEC-010 | Network isolation | VPC, private subnets |
4.5 Compliance
| ID | Requirement | Framework |
|---|---|---|
| NFR-COMP-001 | SOC 2 Type II | Annual audit |
| NFR-COMP-002 | GDPR | Data processing agreements |
| NFR-COMP-003 | Data residency | EU, US, APAC regions |
| NFR-COMP-004 | Audit logging | Immutable logs, 1-year retention |
| NFR-COMP-005 | Data retention | Configurable policies |
| NFR-COMP-006 | Right to deletion | 30-day deletion guarantee |
| NFR-COMP-007 | Breach notification | 72-hour notification |
4.6 Maintainability
| ID | Requirement | Target |
|---|---|---|
| NFR-MAINT-001 | Code coverage | > 80% unit test coverage |
| NFR-MAINT-002 | Documentation | API docs, runbooks |
| NFR-MAINT-003 | Deployment frequency | Multiple times per day |
| NFR-MAINT-004 | Lead time for changes | < 1 day |
| NFR-MAINT-005 | Mean time to recovery | < 1 hour |
| NFR-MAINT-006 | Change failure rate | < 5% |
| NFR-MAINT-007 | Observability | Logs, metrics, traces |
| NFR-MAINT-008 | Feature flags | LaunchDarkly integration |
4.7 Usability
| ID | Requirement | Description |
|---|---|---|
| NFR-UX-001 | Responsive design | Desktop, tablet support |
| NFR-UX-002 | Accessibility | WCAG 2.1 AA compliance |
| NFR-UX-003 | Browser support | Chrome, Firefox, Safari, Edge (last 2 versions) |
| NFR-UX-004 | Keyboard navigation | Full keyboard support |
| NFR-UX-005 | Color contrast | 4.5:1 minimum |
| NFR-UX-006 | Screen reader | ARIA labels, announcements |
| NFR-UX-007 | Onboarding | Interactive tutorial |
| NFR-UX-008 | Error messages | Clear, actionable errors |
5. Constraints
5.1 Technical Constraints
| ID | Constraint | Impact |
|---|---|---|
| CONS-001 | Cloudflare Workers runtime | Limited to V8 isolate capabilities |
| CONS-002 | WebSocket connections | Max 1000 concurrent per Durable Object |
| CONS-003 | R2 object size | Max 5GB per object |
| CONS-004 | Worker execution time | Max 30 seconds (HTTP), unlimited (DO) |
| CONS-005 | Durable Object storage | Max 1GB per object |
| CONS-006 | Browser compatibility | No IE11 support |
5.2 Business Constraints
| ID | Constraint | Impact |
|---|---|---|
| CONS-007 | Budget | $50K/month infrastructure budget |
| CONS-008 | Timeline | MVP in 3 months, GA in 6 months |
| CONS-009 | Team size | 8 engineers |
| CONS-010 | Third-party dependencies | Minimize external services |
5.3 Regulatory Constraints
| ID | Constraint | Impact |
|---|---|---|
| CONS-011 | Data residency | EU data stays in EU |
| CONS-012 | Audit requirements | 7-year log retention |
| CONS-013 | Encryption standards | FIPS 140-2 Level 2 |
6. Quality Attributes
6.1 Quality Attribute Scenarios
QA-1: Performance Under Load
Scenario: Black Friday traffic spike
Stimulus: 10,000 concurrent users
Environment: Production, peak hours
Response: Auto-scale to 50 workers
Measure: < 3s response time maintained
QA-2: Security Breach
Scenario: API key compromised
Stimulus: Unauthorized access attempt
Environment: Production
Response: Automatic key revocation, audit log
Measure: Zero data exfiltration
QA-3: Provider Outage
Scenario: Anthropic API down
Stimulus: Claude API 500 errors
Environment: Production
Response: Automatic failover to Gemini
Measure: < 5s failover time
QA-4: Disaster Recovery
Scenario: Region failure
Stimulus: us-east-1 unavailable
Environment: Production
Response: Failover to us-west-2
Measure: RTO < 1 hour, RPO < 5 minutes
6.2 Quality Attribute Priorities
| Attribute | Priority | Rationale |
|---|---|---|
| Security | Critical | Multi-tenant, enterprise customers |
| Availability | Critical | Development tools must be reliable |
| Performance | High | IDE responsiveness critical |
| Scalability | High | Growth to 10K+ users |
| Maintainability | Medium | Long-term team productivity |
| Usability | Medium | Adoption and retention |
| Portability | Low | Cloud-native, no on-prem |
7. Interface Requirements
7.1 User Interfaces
| Interface | Technology | Responsibilities |
|---|---|---|
| Web Application | Next.js 14 | Main user interface |
| Mobile Web | Responsive CSS | Tablet support (Phase 2) |
| Native Mobile | React Native | iOS/Android (Phase 3) |
7.2 System Interfaces
| Interface | Protocol | Purpose |
|---|---|---|
| LLM APIs | HTTPS/REST | Claude, Gemini, Codex, Kimi |
| Git Providers | HTTPS/SSH | GitHub, GitLab, Bitbucket |
| Identity Providers | SAML/OIDC | SSO integration |
| Storage | S3 API | R2/GCS operations |
| Monitoring | OTLP | Traces to observability platform |
7.3 API Requirements
| Requirement | Description |
|---|---|
| RESTful Design | Standard HTTP methods, resource-oriented URLs |
| Versioning | /api/v1/ prefix |
| Pagination | Cursor-based for large collections |
| Rate Limiting | 1000 req/min per user |
| CORS | Configurable allowed origins |
| Content Types | JSON, optional MessagePack |
8. Deployment Requirements
8.1 Environment Requirements
| Environment | Purpose | SLA |
|---|---|---|
| Development | Feature development | Best effort |
| Staging | Integration testing | 99% |
| Production | Live users | 99.9% |
8.2 Infrastructure Requirements
| Component | Specification |
|---|---|
| CDN | Cloudflare CDN with Argo Smart Routing |
| Edge Compute | Cloudflare Workers (100+ locations) |
| Stateful Compute | Durable Objects (3 regions) |
| Storage | R2 (primary), GCS (backup) |
| Database | Durable Objects (session state), PostgreSQL (metadata) |
| Message Queue | Cloudflare Queues |
| Monitoring | Datadog + Cloudflare Analytics |
8.3 Geographic Requirements
| Region | Locations | Purpose |
|---|---|---|
| Americas | us-east, us-west | Primary |
| Europe | eu-west, eu-central | GDPR compliance |
| APAC | ap-southeast, ap-northeast | Latency optimization |
9. Risk Assessment
9.1 Technical Risks
| Risk | Probability | Impact | Mitigation |
|---|---|---|---|
| LLM provider rate limits | High | Medium | Multi-provider, caching |
| WebSocket connection limits | Medium | High | Connection pooling |
| R2 latency for small files | Medium | Medium | Cache hot files in DO |
| Sandbox cold start time | Medium | High | Pre-warmed pool |
| Browser compatibility issues | Low | Medium | Automated testing |
9.2 Business Risks
| Risk | Probability | Impact | Mitigation |
|---|---|---|---|
| Competition releases first | Medium | High | Agile delivery |
| Enterprise sales cycle | High | Medium | Land-and-expand |
| LLM cost volatility | Medium | Medium | Pass-through pricing |
10. Appendix
10.1 Reference Documents
- ADR-141: Pitch Deck Studio Architecture
- ADR-143: IN-PLACE Document Translation
- MOE-Agents C4 Architecture
- Cloudflare Workers Best Practices
10.2 Glossary
| Term | Definition |
|---|---|
| Thin Client | Browser-based UI with server-side compute |
| Durable Object | Cloudflare's stateful edge compute primitive |
| Sandbox | Isolated ephemeral execution environment |
| Circuit Breaker | Fault tolerance pattern |
| TTFB | Time To First Byte |
| TTI | Time To Interactive |
10.3 Change Log
| Version | Date | Author | Changes |
|---|---|---|---|
| 1.0.0 | 2026-01-31 | Platform Team | Initial version |
Document Owner: Architecture Team
Review Cycle: Per-release
Next Review: 2026-02-28