Functional Requirements v2.0
Version: 2.0.0
Status: DRAFT
Date: 2025-01-29
Supersedes: FUNCTIONAL-REQUIREMENTS-ONBOARDING-CHAT.md v1.0
Purpose
This document defines the functional requirements for Sasha Studio's user-facing features. It uses RFC 2119 keywords (MUST, SHOULD, MAY) to indicate requirement priority.
1. User Onboarding
1.1 Organization Setup (P0)
REQ-1.1.1: The system MUST present an organization setup screen to first-time users.
REQ-1.1.2: The organization setup screen MUST collect:
- Organization name (required, text field)
- Organization domain (required, URL field)
REQ-1.1.3: The system MUST generate a research prompt in the format: "Research {organization} at {domain}"
REQ-1.1.4: The system MUST store the research prompt temporarily for one-time use.
1.2 Automated Research Initiation (P0)
REQ-1.2.1: The system MUST automatically create or select a project named "company-search" after organization setup.
REQ-1.2.2: The system MUST create a new chat session within the company-search project.
REQ-1.2.3: The system MUST automatically submit the research prompt to Claude.
REQ-1.2.4: The system MUST display Claude's research response in the chat interface.
REQ-1.2.5: The research prompt MUST be submitted exactly once per onboarding flow.
1.3 Success Criteria
| Metric | Requirement | Target |
|---|---|---|
| Time to first response | MUST | < 5 seconds |
| Automatic submissions | MUST | Exactly 1 |
| User interactions required | MUST | 0 (fully automated) |
2. Chat Functionality
2.1 Message Sending (P0)
REQ-2.1.1: Users MUST be able to send text messages to Claude.
REQ-2.1.2: The system MUST display user messages immediately in the chat interface.
REQ-2.1.3: The system MUST show Claude's responses as they are generated.
REQ-2.1.4: Messages MUST appear in chronological order.
2.2 Response Time (P0)
REQ-2.2.1: User messages MUST appear in the UI within 100ms of submission.
REQ-2.2.2: Claude's response MUST begin appearing within 2 seconds of message submission.
REQ-2.2.3: The system MUST stream Claude's response in real-time as it is generated (target: <100ms per message update).
2.3 Session Persistence (P0)
REQ-2.3.1: Chat messages MUST persist across page refreshes.
REQ-2.3.2: The system MUST maintain message history for all sessions.
REQ-2.3.3: Users MUST be able to return to previous conversations.
3. Project Management
3.1 Project Creation (P1)
REQ-3.1.1: Users MUST be able to create new projects.
REQ-3.1.2: Project names MUST be unique within a user's workspace.
REQ-3.1.3: The system MUST automatically select newly created projects.
3.2 Project Selection (P0)
REQ-3.2.1: Users MUST be able to switch between projects.
REQ-3.2.2: When selecting a project, the system MUST display that project's most recent session.
REQ-3.2.3: Project selection MUST complete within 500ms.
3.3 File Management (P1)
REQ-3.3.1: Each project MUST have an associated file system directory.
REQ-3.3.2: Users MUST be able to reference project files using @mentions in chat.
REQ-3.3.3: The system MUST display a file tree for each project.
4. Session Management
4.1 Session Creation (P0)
REQ-4.1.1: The system MUST automatically create a session when the first message is sent in a project.
REQ-4.1.2: Each session MUST have a unique identifier.
REQ-4.1.3: Sessions MUST belong to exactly one project.
4.2 Session Navigation (P1)
REQ-4.2.1: Users MUST be able to switch between sessions within a project.
REQ-4.2.2: The system MUST display session timestamps.
REQ-4.2.3: Sessions SHOULD be ordered by most recent activity.
5. User Interface
5.1 Navigation (P1)
REQ-5.1.1: The system MUST update the URL to reflect the current context.
REQ-5.1.2: URLs MUST follow the pattern: /project/{projectName}/chat/{sessionId}
REQ-5.1.3: Browser back/forward buttons MUST work correctly.
REQ-5.1.4: URLs MUST be bookmarkable and shareable.
5.2 Visual Feedback (P0)
REQ-5.2.1: The system MUST provide loading indicators during operations.
REQ-5.2.2: Error messages MUST be displayed when operations fail.
REQ-5.2.3: The UI MUST NOT flash or flicker during updates.
5.3 Responsiveness (P2)
REQ-5.3.1: The interface SHOULD be usable on mobile devices.
REQ-5.3.2: The system SHOULD support keyboard navigation.
REQ-5.3.3: The system MAY provide keyboard shortcuts for common actions.
6. Performance Requirements
6.1 Rendering (P0)
REQ-6.1.1: User actions MUST NOT trigger more than 3 component re-renders (target: 1-2 for message updates).
REQ-6.1.2: File system changes MUST NOT cause full application re-renders.
REQ-6.1.3: The system MUST update only affected UI components.
6.2 Data Loading (P1)
REQ-6.2.1: Project files MUST be fetched at most once per session.
REQ-6.2.2: The system MUST cache project data in memory.
REQ-6.2.3: Cached data MUST be used for subsequent operations.
6.3 Resource Usage (P2)
REQ-6.3.1: CPU usage SHOULD remain below 5% during idle state.
REQ-6.3.2: Memory usage SHOULD not grow unbounded over time.
REQ-6.3.3: The system SHOULD clean up unused resources.
7. Real-time Updates
7.1 WebSocket Communication (P0)
REQ-7.1.1: The system MUST maintain a persistent WebSocket connection.
REQ-7.1.2: The connection MUST automatically reconnect if disconnected.
REQ-7.1.3: Updates MUST be delivered within 500ms of file changes.
7.2 Update Granularity (P1)
REQ-7.2.1: Documentation changes MUST trigger only toast notifications (0 re-renders).
REQ-7.2.2: Session updates MUST update only the chat messages (1-2 re-renders per message).
REQ-7.2.3: File changes MUST update only the file tree (1-3 re-renders).
8. Documentation Processing
8.1 Markdown Support (P2)
REQ-8.1.1: The system MUST detect markdown files in documentation directories.
REQ-8.1.2: Markdown files MUST be converted to HTML for viewing.
REQ-8.1.3: Users MUST be notified when documentation is updated.
8.2 Processing Performance (P2)
REQ-8.2.1: HTML generation SHOULD complete within 1 second.
REQ-8.2.2: Multiple documentation changes SHOULD be batched.
REQ-8.2.3: Documentation updates MUST NOT block the UI.
9. Error Handling
9.1 User Errors (P0)
REQ-9.1.1: The system MUST validate user input before processing.
REQ-9.1.2: Invalid input MUST produce clear error messages.
REQ-9.1.3: Users MUST be able to recover from errors without data loss.
9.2 System Errors (P0)
REQ-9.2.1: The system MUST gracefully handle network failures.
REQ-9.2.2: The system MUST retry failed operations with exponential backoff.
REQ-9.2.3: Persistent failures MUST be reported to the user.
10. Security
10.1 Authentication (P0)
REQ-10.1.1: Users MUST authenticate before accessing the system.
REQ-10.1.2: Authentication tokens MUST be stored securely.
REQ-10.1.3: Sessions MUST expire after inactivity.
10.2 Authorization (P1)
REQ-10.2.1: Users MUST only access their own projects.
REQ-10.2.2: Administrative functions MUST require admin privileges.
REQ-10.2.3: The system MUST validate permissions on each request.
Acceptance Criteria Format
Each requirement can be tested using:
GIVEN: [Initial state]
WHEN: [User action or system event]
THEN: [Expected outcome]
MEASURE: [Quantifiable metric]
Priority Definitions
- P0: Critical - Core functionality, system unusable without it
- P1: Important - Key features, significant user impact
- P2: Nice to have - Enhances experience, not essential
- P3: Future - Consider for later releases
Performance Summary Table
| Operation | Max Re-renders | Max Latency | WebSocket Size |
|---|---|---|---|
| Send message | 1-2 | <100ms | <500 bytes |
| Receive message | 1-2 | <100ms | <500 bytes |
| Switch project | 3 | <500ms | N/A |
| Save document | 0 (toast only) | <1000ms | <1KB |
| Update file tree | 1-3 | <500ms | <5KB |
Change Log
- v2.0.1 (2025-01-29): Added specific performance targets for consistency
- v2.0.0 (2025-01-29): Complete rewrite for clarity and testability
- v1.0.0: Original combined requirements document (deprecated)