Initial commit: Linear-integrated autonomous coding agent with Initializer Bis support

prompts/app_spec.txt

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+<project_specification>
+  <project_name>Claude.ai Clone - AI Chat Interface</project_name>
+
+  <overview>
+    Build a fully functional clone of claude.ai, Anthropic's conversational AI interface. The application should
+    provide a clean, modern chat interface for interacting with Claude via the API, including features like
+    conversation management, artifact rendering, project organization, multiple model selection, and advanced
+    settings. The UI should closely match claude.ai's design using Tailwind CSS with a focus on excellent
+    user experience and responsive design.
+  </overview>
+
+  <technology_stack>
+    <api_key>
+        You can use an API key located at /tmp/api-key for testing. You will not be allowed to read this file, but you can reference it in code.
+    </api_key>
+    <frontend>
+      <framework>React with Vite</framework>
+      <styling>Tailwind CSS (via CDN)</styling>
+      <state_management>React hooks and context</state_management>
+      <routing>React Router for navigation</routing>
+      <markdown>React Markdown for message rendering</markdown>
+      <code_highlighting>Syntax highlighting for code blocks</code_highlighting>
+      <port>Only launch on port {frontend_port}</port>
+    </frontend>
+    <backend>
+      <runtime>Node.js with Express</runtime>
+      <database>SQLite with better-sqlite3</database>
+      <api_integration>Claude API for chat completions</api_integration>
+      <streaming>Server-Sent Events for streaming responses</streaming>
+    </backend>
+    <communication>
+      <api>RESTful endpoints</api>
+      <streaming>SSE for real-time message streaming</streaming>
+      <claude_api>Integration with Claude API using Anthropic SDK</claude_api>
+    </communication>
+  </technology_stack>
+
+  <prerequisites>
+    <environment_setup>
+      - Repository includes .env with VITE_ANTHROPIC_API_KEY configured
+      - Frontend dependencies pre-installed via pnpm
+      - Backend code goes in /server directory
+      - Install backend dependencies as needed
+    </environment_setup>
+  </prerequisites>
+
+  <core_features>
+    <chat_interface>
+      - Clean, centered chat layout with message bubbles
+      - Streaming message responses with typing indicator
+      - Markdown rendering with proper formatting
+      - Code blocks with syntax highlighting and copy button
+      - LaTeX/math equation rendering
+      - Image upload and display in messages
+      - Multi-turn conversations with context
+      - Message editing and regeneration
+      - Stop generation button during streaming
+      - Input field with auto-resize textarea
+      - Character count and token estimation
+      - Keyboard shortcuts (Enter to send, Shift+Enter for newline)
+    </chat_interface>
+
+    <artifacts>
+      - Artifact detection and rendering in side panel
+      - Code artifact viewer with syntax highlighting
+      - HTML/SVG preview with live rendering
+      - React component preview
+      - Mermaid diagram rendering
+      - Text document artifacts
+      - Artifact editing and re-prompting
+      - Full-screen artifact view
+      - Download artifact content
+      - Artifact versioning and history
+    </artifacts>
+
+    <conversation_management>
+      - Create new conversations
+      - Conversation list in sidebar
+      - Rename conversations
+      - Delete conversations
+      - Search conversations by title/content
+      - Pin important conversations
+      - Archive conversations
+      - Conversation folders/organization
+      - Duplicate conversation
+      - Export conversation (JSON, Markdown, PDF)
+      - Conversation timestamps (created, last updated)
+      - Unread message indicators
+    </conversation_management>
+
+    <projects>
+      - Create projects to group related conversations
+      - Project knowledge base (upload documents)
+      - Project-specific custom instructions
+      - Share projects with team (mock feature)
+      - Project settings and configuration
+      - Move conversations between projects
+      - Project templates
+      - Project analytics (usage stats)
+    </projects>
+
+    <model_selection>
+      - Model selector dropdown with the following models:
+        - Claude Sonnet 4.5 (claude-sonnet-4-5-20250929) - default
+        - Claude Haiku 4.5 (claude-haiku-4-5-20251001)
+        - Claude Opus 4.1 (claude-opus-4-1-20250805)
+      - Model capabilities display
+      - Context window indicator
+      - Model-specific pricing info (display only)
+      - Switch models mid-conversation
+      - Model comparison view
+    </model_selection>
+
+    <custom_instructions>
+      - Global custom instructions
+      - Project-specific custom instructions
+      - Conversation-specific system prompts
+      - Custom instruction templates
+      - Preview how instructions affect responses
+    </custom_instructions>
+
+    <settings_preferences>
+      - Theme selection (Light, Dark, Auto)
+      - Font size adjustment
+      - Message density (compact, comfortable, spacious)
+      - Code theme selection
+      - Language preferences
+      - Accessibility options
+      - Keyboard shortcuts reference
+      - Data export options
+      - Privacy settings
+      - API key management
+    </settings_preferences>
+
+    <advanced_features>
+      - Temperature control slider
+      - Max tokens adjustment
+      - Top-p (nucleus sampling) control
+      - System prompt override
+      - Thinking/reasoning mode toggle
+      - Multi-modal input (text + images)
+      - Voice input (optional, mock UI)
+      - Response suggestions
+      - Related prompts
+      - Conversation branching
+    </advanced_features>
+
+    <collaboration>
+      - Share conversation via link (read-only)
+      - Export conversation formats
+      - Conversation templates
+      - Prompt library
+      - Share artifacts
+      - Team workspaces (mock UI)
+    </collaboration>
+
+    <search_discovery>
+      - Search across all conversations
+      - Filter by project, date, model
+      - Prompt library with categories
+      - Example conversations
+      - Quick actions menu
+      - Command palette (Cmd/Ctrl+K)
+    </search_discovery>
+
+    <usage_tracking>
+      - Token usage display per message
+      - Conversation cost estimation
+      - Daily/monthly usage dashboard
+      - Usage limits and warnings
+      - API quota tracking
+    </usage_tracking>
+
+    <onboarding>
+      - Welcome screen for new users
+      - Feature tour highlights
+      - Example prompts to get started
+      - Quick tips and best practices
+      - Keyboard shortcuts tutorial
+    </onboarding>
+
+    <accessibility>
+      - Full keyboard navigation
+      - Screen reader support
+      - ARIA labels and roles
+      - High contrast mode
+      - Focus management
+      - Reduced motion support
+    </accessibility>
+
+    <responsive_design>
+      - Mobile-first responsive layout
+      - Touch-optimized interface
+      - Collapsible sidebar on mobile
+      - Swipe gestures for navigation
+      - Adaptive artifact display
+      - Progressive Web App (PWA) support
+    </responsive_design>
+  </core_features>
+
+  <database_schema>
+    <tables>
+      <users>
+        - id, email, name, avatar_url
+        - created_at, last_login
+        - preferences (JSON: theme, font_size, etc.)
+        - custom_instructions
+      </users>
+
+      <projects>
+        - id, user_id, name, description, color
+        - custom_instructions, knowledge_base_path
+        - created_at, updated_at
+        - is_archived, is_pinned
+      </projects>
+
+      <conversations>
+        - id, user_id, project_id, title
+        - model, created_at, updated_at, last_message_at
+        - is_archived, is_pinned, is_deleted
+        - settings (JSON: temperature, max_tokens, etc.)
+        - token_count, message_count
+      </conversations>
+
+      <messages>
+        - id, conversation_id, role (user/assistant/system)
+        - content, created_at, edited_at
+        - tokens, finish_reason
+        - images (JSON array of image data)
+        - parent_message_id (for branching)
+      </messages>
+
+      <artifacts>
+        - id, message_id, conversation_id
+        - type (code/html/svg/react/mermaid/text)
+        - title, identifier, language
+        - content, version
+        - created_at, updated_at
+      </artifacts>
+
+      <shared_conversations>
+        - id, conversation_id, share_token
+        - created_at, expires_at, view_count
+        - is_public
+      </shared_conversations>
+
+      <prompt_library>
+        - id, user_id, title, description
+        - prompt_template, category, tags (JSON)
+        - is_public, usage_count
+        - created_at, updated_at
+      </prompt_library>
+
+      <conversation_folders>
+        - id, user_id, project_id, name, parent_folder_id
+        - created_at, position
+      </conversation_folders>
+
+      <conversation_folder_items>
+        - id, folder_id, conversation_id
+      </conversation_folder_items>
+
+      <usage_tracking>
+        - id, user_id, conversation_id, message_id
+        - model, input_tokens, output_tokens
+        - cost_estimate, created_at
+      </usage_tracking>
+
+      <api_keys>
+        - id, user_id, key_name, api_key_hash
+        - created_at, last_used_at
+        - is_active
+      </api_keys>
+    </tables>
+  </database_schema>
+
+  <api_endpoints_summary>
+    <authentication>
+      - POST /api/auth/login
+      - POST /api/auth/logout
+      - GET /api/auth/me
+      - PUT /api/auth/profile
+    </authentication>
+
+    <conversations>
+      - GET /api/conversations
+      - POST /api/conversations
+      - GET /api/conversations/:id
+      - PUT /api/conversations/:id
+      - DELETE /api/conversations/:id
+      - POST /api/conversations/:id/duplicate
+      - POST /api/conversations/:id/export
+      - PUT /api/conversations/:id/archive
+      - PUT /api/conversations/:id/pin
+      - POST /api/conversations/:id/branch
+    </conversations>
+
+    <messages>
+      - GET /api/conversations/:id/messages
+      - POST /api/conversations/:id/messages
+      - PUT /api/messages/:id
+      - DELETE /api/messages/:id
+      - POST /api/messages/:id/regenerate
+      - GET /api/messages/stream (SSE endpoint)
+    </messages>
+
+    <artifacts>
+      - GET /api/conversations/:id/artifacts
+      - GET /api/artifacts/:id
+      - PUT /api/artifacts/:id
+      - DELETE /api/artifacts/:id
+      - POST /api/artifacts/:id/fork
+      - GET /api/artifacts/:id/versions
+    </artifacts>
+
+    <projects>
+      - GET /api/projects
+      - POST /api/projects
+      - GET /api/projects/:id
+      - PUT /api/projects/:id
+      - DELETE /api/projects/:id
+      - POST /api/projects/:id/knowledge
+      - GET /api/projects/:id/conversations
+      - PUT /api/projects/:id/settings
+    </projects>
+
+    <sharing>
+      - POST /api/conversations/:id/share
+      - GET /api/share/:token
+      - DELETE /api/share/:token
+      - PUT /api/share/:token/settings
+    </sharing>
+
+    <prompts>
+      - GET /api/prompts/library
+      - POST /api/prompts/library
+      - GET /api/prompts/:id
+      - PUT /api/prompts/:id
+      - DELETE /api/prompts/:id
+      - GET /api/prompts/categories
+      - GET /api/prompts/examples
+    </prompts>
+
+    <search>
+      - GET /api/search/conversations?q=query
+      - GET /api/search/messages?q=query
+      - GET /api/search/artifacts?q=query
+      - GET /api/search/prompts?q=query
+    </search>
+
+    <folders>
+      - GET /api/folders
+      - POST /api/folders
+      - PUT /api/folders/:id
+      - DELETE /api/folders/:id
+      - POST /api/folders/:id/items
+      - DELETE /api/folders/:id/items/:conversationId
+    </folders>
+
+    <usage>
+      - GET /api/usage/daily
+      - GET /api/usage/monthly
+      - GET /api/usage/by-model
+      - GET /api/usage/conversations/:id
+    </usage>
+
+    <settings>
+      - GET /api/settings
+      - PUT /api/settings
+      - GET /api/settings/custom-instructions
+      - PUT /api/settings/custom-instructions
+    </settings>
+
+    <claude_api>
+      - POST /api/claude/chat (proxy to Claude API)
+      - POST /api/claude/chat/stream (streaming proxy)
+      - GET /api/claude/models
+      - POST /api/claude/images/upload
+    </claude_api>
+  </api_endpoints_summary>
+
+  <ui_layout>
+    <main_structure>
+      - Three-column layout: sidebar (conversations), main (chat), panel (artifacts)
+      - Collapsible sidebar with resize handle
+      - Responsive breakpoints: mobile (single column), tablet (two column), desktop (three column)
+      - Persistent header with project/model selector
+      - Bottom input area with send button and options
+    </main_structure>
+
+    <sidebar_left>
+      - New chat button (prominent)
+      - Project selector dropdown
+      - Search conversations input
+      - Conversations list (grouped by date: Today, Yesterday, Previous 7 days, etc.)
+      - Folder tree view (collapsible)
+      - Settings gear icon at bottom
+      - User profile at bottom
+    </sidebar_left>
+
+    <main_chat_area>
+      - Conversation title (editable inline)
+      - Model selector badge
+      - Message history (scrollable)
+      - Welcome screen for new conversations
+      - Suggested prompts (empty state)
+      - Input area with formatting toolbar
+      - Attachment button for images
+      - Send button with loading state
+      - Stop generation button
+    </main_chat_area>
+
+    <artifacts_panel>
+      - Artifact header with title and type badge
+      - Code editor or preview pane
+      - Tabs for multiple artifacts
+      - Full-screen toggle
+      - Download button
+      - Edit/Re-prompt button
+      - Version selector
+      - Close panel button
+    </artifacts_panel>
+
+    <modals_overlays>
+      - Settings modal (tabbed interface)
+      - Share conversation modal
+      - Export options modal
+      - Project settings modal
+      - Prompt library modal
+      - Command palette overlay
+      - Keyboard shortcuts reference
+    </modals_overlays>
+  </ui_layout>
+
+  <design_system>
+    <color_palette>
+      - Primary: Orange/amber accent (#CC785C claude-style)
+      - Background: White (light mode), Dark gray (#1A1A1A dark mode)
+      - Surface: Light gray (#F5F5F5 light), Darker gray (#2A2A2A dark)
+      - Text: Near black (#1A1A1A light), Off-white (#E5E5E5 dark)
+      - Borders: Light gray (#E5E5E5 light), Dark gray (#404040 dark)
+      - Code blocks: Monaco editor theme
+    </color_palette>
+
+    <typography>
+      - Sans-serif system font stack (Inter, SF Pro, Roboto, system-ui)
+      - Headings: font-semibold
+      - Body: font-normal, leading-relaxed
+      - Code: Monospace (JetBrains Mono, Consolas, Monaco)
+      - Message text: text-base (16px), comfortable line-height
+    </typography>
+
+    <components>
+      <message_bubble>
+        - User messages: Right-aligned, subtle background
+        - Assistant messages: Left-aligned, no background
+        - Markdown formatting with proper spacing
+        - Inline code with bg-gray-100 background
+        - Code blocks with syntax highlighting
+        - Copy button on code blocks
+      </message_bubble>
+
+      <buttons>
+        - Primary: Orange/amber background, white text, rounded
+        - Secondary: Border style with hover fill
+        - Icon buttons: Square with hover background
+        - Disabled state: Reduced opacity, no pointer events
+      </buttons>
+
+      <inputs>
+        - Rounded borders with focus ring
+        - Textarea auto-resize
+        - Placeholder text in gray
+        - Error states in red
+        - Character counter
+      </inputs>
+
+      <cards>
+        - Subtle border or shadow
+        - Rounded corners (8px)
+        - Padding: p-4 to p-6
+        - Hover state: slight shadow increase
+      </cards>
+    </components>
+
+    <animations>
+      - Smooth transitions (150-300ms)
+      - Fade in for new messages
+      - Slide in for sidebar
+      - Typing indicator animation
+      - Loading spinner for generation
+      - Skeleton loaders for content
+    </animations>
+  </design_system>
+
+  <key_interactions>
+    <message_flow>
+      1. User types message in input field
+      2. Optional: Attach images via button
+      3. Click send or press Enter
+      4. Message appears in chat immediately
+      5. Typing indicator shows while waiting
+      6. Response streams in word by word
+      7. Code blocks render with syntax highlighting
+      8. Artifacts detected and rendered in side panel
+      9. Message complete, enable regenerate option
+    </message_flow>
+
+    <artifact_flow>
+      1. Assistant generates artifact in response
+      2. Artifact panel slides in from right
+      3. Content renders (code with highlighting or live preview)
+      4. User can edit artifact inline
+      5. "Re-prompt" button to iterate with Claude
+      6. Download or copy artifact content
+      7. Full-screen mode for detailed work
+      8. Close panel to return to chat focus
+    </artifact_flow>
+
+    <conversation_management>
+      1. Click "New Chat" to start fresh conversation
+      2. Conversations auto-save with first message
+      3. Auto-generate title from first exchange
+      4. Click title to rename inline
+      5. Drag conversations into folders
+      6. Right-click for context menu (pin, archive, delete, export)
+      7. Search filters conversations in real-time
+      8. Click conversation to switch context
+    </conversation_management>
+  </key_interactions>
+
+  <implementation_steps>
+    <step number="1">
+      <title>Setup Project Foundation and Database</title>
+      <tasks>
+        - Initialize Express server with SQLite database
+        - Set up Claude API client with streaming support
+        - Create database schema with migrations
+        - Implement authentication endpoints
+        - Set up basic CORS and middleware
+        - Create health check endpoint
+      </tasks>
+    </step>
+
+    <step number="2">
+      <title>Build Core Chat Interface</title>
+      <tasks>
+        - Create main layout with sidebar and chat area
+        - Implement message display with markdown rendering
+        - Add streaming message support with SSE
+        - Build input area with auto-resize textarea
+        - Add code block syntax highlighting
+        - Implement stop generation functionality
+        - Add typing indicators and loading states
+      </tasks>
+    </step>
+
+    <step number="3">
+      <title>Conversation Management</title>
+      <tasks>
+        - Create conversation list in sidebar
+        - Implement new conversation creation
+        - Add conversation switching
+        - Build conversation rename functionality
+        - Implement delete with confirmation
+        - Add conversation search
+        - Create conversation grouping by date
+      </tasks>
+    </step>
+
+    <step number="4">
+      <title>Artifacts System</title>
+      <tasks>
+        - Build artifact detection from Claude responses
+        - Create artifact rendering panel
+        - Implement code artifact viewer
+        - Add HTML/SVG live preview
+        - Build artifact editing interface
+        - Add artifact versioning
+        - Implement full-screen artifact view
+      </tasks>
+    </step>
+
+    <step number="5">
+      <title>Projects and Organization</title>
+      <tasks>
+        - Create projects CRUD endpoints
+        - Build project selector UI
+        - Implement project-specific custom instructions
+        - Add folder system for conversations
+        - Create drag-and-drop organization
+        - Build project settings panel
+      </tasks>
+    </step>
+
+    <step number="6">
+      <title>Advanced Features</title>
+      <tasks>
+        - Add model selection dropdown
+        - Implement temperature and parameter controls
+        - Build image upload functionality
+        - Create message editing and regeneration
+        - Add conversation branching
+        - Implement export functionality
+      </tasks>
+    </step>
+
+    <step number="7">
+      <title>Settings and Customization</title>
+      <tasks>
+        - Build settings modal with tabs
+        - Implement theme switching (light/dark)
+        - Add custom instructions management
+        - Create keyboard shortcuts
+        - Build prompt library
+        - Add usage tracking dashboard
+      </tasks>
+    </step>
+
+    <step number="8">
+      <title>Sharing and Collaboration</title>
+      <tasks>
+        - Implement conversation sharing with tokens
+        - Create public share view
+        - Add export to multiple formats
+        - Build prompt templates
+        - Create example conversations
+      </tasks>
+    </step>
+
+    <step number="9">
+      <title>Polish and Optimization</title>
+      <tasks>
+        - Optimize for mobile responsiveness
+        - Add command palette (Cmd+K)
+        - Implement comprehensive keyboard navigation
+        - Add onboarding flow
+        - Create accessibility improvements
+        - Performance optimization and caching
+      </tasks>
+    </step>
+  </implementation_steps>
+
+  <success_criteria>
+    <functionality>
+      - Streaming chat responses work smoothly
+      - Artifact detection and rendering accurate
+      - Conversation management intuitive and reliable
+      - Project organization clear and useful
+      - Image upload and display working
+      - All CRUD operations functional
+    </functionality>
+
+    <user_experience>
+      - Interface matches claude.ai design language
+      - Responsive on all device sizes
+      - Smooth animations and transitions
+      - Fast response times and minimal lag
+      - Intuitive navigation and workflows
+      - Clear feedback for all actions
+    </user_experience>
+
+    <technical_quality>
+      - Clean, maintainable code structure
+      - Proper error handling throughout
+      - Secure API key management
+      - Optimized database queries
+      - Efficient streaming implementation
+      - Comprehensive testing coverage
+    </technical_quality>
+
+    <design_polish>
+      - Consistent with claude.ai visual design
+      - Beautiful typography and spacing
+      - Smooth animations and micro-interactions
+      - Excellent contrast and accessibility
+      - Professional, polished appearance
+      - Dark mode fully implemented
+    </design_polish>
+  </success_criteria>
+</project_specification>