feat: Verbalized Sampling Desktop App - Phase 1 Setup #4
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Initialize Tauri 2 project with React + TypeScript for cross-platform desktop application. Includes: **Tauri Configuration (T001-T006)** - Scaffold Tauri 2 with React 18 and TypeScript - Configure shell plugin for Python sidecar execution - Add Tauri Store plugin for persistent preferences - Add Tauri Stronghold plugin for encrypted API key storage - Set sidecar binary paths (binaries/vs-bridge) - Configure capabilities: filesystem, shell, store, stronghold **Frontend Structure (T007-T009)** - Create React app structure (components/, hooks/, types/, utils/) - Add Recharts dependency for probability visualizations - Vite already configured for Tauri development **Build Pipeline (T010-T012)** - Create build-sidecar.sh placeholder script - Update .gitignore with Rust, Python, and Tauri patterns - Create Python sidecar structure (vs_bridge/) **Additional Setup** - Create schemas/v1/ for JSON contracts - Create test directories (contract/, integration/, e2e/, unit/) - Add SpecKit commands and constitution templates **Project Structure** ``` verbalized-sampling-app/ ├── src/ # React frontend ├── src-tauri/ # Rust backend with plugins ├── vs_bridge/ # Python sidecar (FastAPI) ├── schemas/v1/ # JSON contracts ├── tests/ # Test suites └── scripts/ # Build scripts ``` **Status**: Phase 1 complete (12/12 tasks) ✅ **Next**: Phase 2 Foundational infrastructure (sidecar, contracts, types) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Complete FastAPI server setup and PyInstaller build pipeline for Python sidecar.
**Sidecar Infrastructure**
- FastAPI server with health check endpoint at `/api/v1/health`
- CORS middleware configured for Tauri webview (dev & production)
- Uvicorn server configured on localhost:8765
- Placeholder endpoints for all features (verbalize, sample, export, session)
**Dependencies & Build**
- requirements.txt with pinned versions (FastAPI 0.104.1, Uvicorn 0.24.0, Pydantic 2.5.0)
- PyInstaller 6.3.0 for bundling
- PyInstaller spec file with hidden imports for FastAPI/Uvicorn
**Build Script**
- Cross-platform build script (`scripts/build-sidecar.sh`)
- Platform detection (macOS/Windows/Linux)
- Architecture detection (x64/ARM64)
- Target-specific binary naming (vs-bridge-{target})
- Health check testing after build
- Automatic PyInstaller installation if missing
**Status**: T013-T018 complete (6/34 Phase 2 tasks) ✅
**Next**: Sidecar lifecycle management in Rust (T020-T026)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <[email protected]>
- Created sidecar manager module (manager.rs) with lifecycle functions: * start_sidecar(): Spawns Python sidecar using Tauri shell plugin * health_check(): Polls /api/v1/health endpoint with 5s timeout * stop_sidecar(): Graceful HTTP shutdown * restart_sidecar(): Crash detection and recovery - Created IPC module (ipc.rs) for HTTP communication: * send_request(): POST with JSON payload and timeout handling * get_request(): GET requests with error handling * Connection refused and timeout detection for restart triggers - Added dependencies: reqwest, tokio, log - Updated lib.rs with lifecycle hooks: * Setup: Starts sidecar and performs health check * Auto-restart on health check failure - Fixed Tauri 2 compatibility: * Updated to tauri-plugin-shell v2 * Fixed capabilities with correct permission names * Fixed stronghold plugin initialization 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Created 8 JSON Schema v7 files defining IPC contracts: - verbalize-request.json: prompt, k, tau, temperature, seed, model, provider - verbalize-response.json: distribution_id, completions[], trace_metadata - sample-request.json: distribution_id, seed for deterministic sampling - sample-response.json: selected_completion, selection_index - export-request.json: distribution_ids[], format (CSV/JSONL), output_path - export-response.json: file_path, row_count, file_size_bytes - session-save-request.json: distributions[], notes, output_path - session-load-response.json: session object with app_version, schema_version Schema features: - JSON Schema Draft 7 with $schema and $id - Validation constraints (min/max, enums, formats) - UUID format for distribution_ids - ISO 8601 timestamps - Trace metadata for reproducibility - Schema versioning in v1/ directory Compliance: Constitution Principle III (Pluggable Architecture) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Created src-tauri/src/models.rs with comprehensive type system: Structs matching JSON schemas: - VerbParams: verbalize request with validation - DistributionResponse: distribution with completions and metadata - CompletionResponse: single completion with probability - SampleRequest/Response: sampling operations - ExportRequest/Response: CSV/JSONL export - SessionSaveRequest: session persistence - SessionLoadResponse: session loading - TraceMetadata: execution trace for reproducibility Features: - Serde Serialize/Deserialize for all types - Provider enum with max_k() validation (API: 100, local: 500) - VerbParams::validate(): k limits, temperature/tau ranges, prompt length - ExportRequest::validate(): distribution_ids, output_path checks - SessionSaveRequest::validate(): distributions, notes length - Default values: tau=1.0, temperature=0.8, include_metadata=true - Optional fields with skip_serializing_if - Enum serialization: snake_case for Provider, lowercase for ExportFormat Validation rules per spec: - k ≤ 100 for API providers (OpenAI, Anthropic, Cohere) - k ≤ 500 for local vLLM - prompt: 1-100,000 chars - temperature: 0.0-2.0 - tau: 0.0-10.0 Compliance: Constitution Principle III (Pluggable Architecture) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
- Create comprehensive Pydantic v2 models matching JSON schemas - Provider enum with max_k() validation logic - VerbRequest with field_validator for k vs provider limits - VerbResponse with datetime JSON encoding - Complete model set: Token/Completion/Trace/Sample/Export/Session - Validation: prompt length, k limits, temperature/tau ranges - Default values: tau=1.0, temperature=0.8 - Contract validation layer for IPC between Tauri and Python sidecar
- Create contracts.ts with interfaces matching JSON schemas - Provider types, validation helpers, default constants - Complete type coverage: Verb/Sample/Export/Session endpoints - Create models.ts with UI-specific state types - Distribution, Session, Provider config models - Form state types for all operations - Utility functions for type conversion and defaults - Type-safe frontend-sidecar IPC contract
- Create Python contract tests for schema validation - Test VerbRequest/VerbResponse validation and serialization - Provider enum limits, field validators, datetime encoding - Comprehensive test coverage for all contract models - Create Rust contract tests for type checking - Test VerbParams validation logic - Provider max_k limits, serialization/deserialization - JSON Schema compliance verification - Create validate-contracts.sh CI script - JSON schema syntax validation - Cross-language provider consistency checks - Automated test execution for Python and Rust - CI-ready with proper error handling and reporting Complete contract validation layer for IPC
… (T047-T056) Provider System: - Create BaseProvider abstract interface with log probability normalization - Implement OpenAIProvider with native n=k and logprobs support - Implement AnthropicProvider with sequential generation (API limitation) - Implement CohereProvider with num_generations and likelihoods - Implement LocalVLLMProvider for self-hosted vLLM servers (k≤500) Verbalize Handler: - VerbalizationService for request orchestration - Provider selection and model validation - Temperature scaling (tau) with log-sum-exp normalization - Token probability extraction when requested - In-memory distribution storage for sampling - Comprehensive error handling and API latency tracking API Endpoint: - Wire /api/v1/verbalize to VerbalizationService - Request/response validation via Pydantic models - TraceMetadata for reproducibility Dependencies: - Add openai, anthropic, cohere, httpx to requirements.txt Phase 3 progress: Verbalize core complete (T047-T056)
Tauri Commands: - Create commands module structure - Implement verbalize command with parameter validation - Wire command to sidecar IPC layer - Request/response handling via sidecar::ipc - Comprehensive error handling and logging Integration: - Register verbalize command in Tauri invoke_handler - Type-safe communication using Rust models - Async command execution via tokio Tests: - Validation tests for empty prompt - k-limit validation tests Phase 3 progress: IPC layer complete (T057-T062)
Components: - ProviderForm: Provider/model selection, prompt input, k/tau/temp controls - DistributionView: Results header with metadata, stats (entropy, min/max prob) - CompletionCard: Rank/probability badges, probability bars, token probs toggle - App: Main layout with form/results sections, loading/error/empty states Hooks & Utils: - useVerbalize: Form state management, validation, API integration - tauri.ts: Tauri command invocation utilities Styling (App.css): - Modern design with CSS custom properties for theming - Dark mode support via prefers-color-scheme - Responsive grid layouts for cards and stats - Smooth transitions and hover effects - Color-coded probability badges (green/yellow/orange/red) - Mobile-responsive design Features: - Real-time validation with error display - Provider-specific k limits (API: 100, vLLM: 500) - Temperature/tau sliders with visual feedback - Token probability expansion toggle - Distribution entropy calculation - Auto-scroll to results on success - Form hide/show after generation Phase 3 (MVP) Complete: Full end-to-end verbalized sampling UI
- Remove unused React imports from CompletionCard and DistributionView - Add null coalescing for temperature and tau in ProviderForm - Export SessionDistribution type to avoid unused import warning
- Removed 'sidecar' and 'scope' fields from shell plugin config - These fields are not supported in Tauri v2 - Sidecar is properly configured via externalBin in bundle section - Fixes app launch issue where plugin initialization failed
- Add OpenRouter provider with popular models - OpenRouter uses OpenAI-compatible API - Support for Anthropic, OpenAI, Google, Meta, Mistral models via OpenRouter - Update all provider types (TypeScript, Python, Rust) - Create new app icons representing probability distributions - Replace old JD app icons with Verbalized Sampling design - Purple gradient with distribution curve and sample points visualization
- Document environment variable setup for all providers - Explain OpenRouter, OpenAI, Anthropic, Cohere, and Local vLLM config - Provide launch script examples - Add security notes and provider capabilities - Include local vLLM setup instructions
- Identify 20 missing features/improvements - Categorize by priority: Critical, Important, Nice-to-Have, Technical Debt - Phase-based implementation plan - Focus on API key UI, missing commands, session management - Document UX, testing, security, and accessibility gaps
Commands implemented: - sample: Sample from existing distribution - export: Export distributions to CSV/JSONL - session_save: Save current session to file - session_load: Load saved session from file Frontend utilities: - Add TypeScript wrappers for all new commands in tauri.ts Distribution History sidebar: - Display list of past distributions with search - Show provider, model, timestamp, prompt preview - Click to select distribution - Delete button (with confirmation needed) - Responsive design with proper styling - Timestamp formatting (Just now, 2m ago, Yesterday, etc.) Next: Integrate sidebar into App.tsx layout
…t, sampling, and API keys Implemented all 5 Phase 1 features from gap analysis: - Session Management UI: Save/load sessions with auto-save toggle and session notes - Export UI: Export distributions to CSV/JSONL with metadata options - Sampling UI: Sample from distributions with optional seed for reproducibility - API Key Settings: Secure key storage using Tauri Store with show/hide toggles - Error Handling: API key validation before requests with user-friendly error messages New Components: - SessionManager.tsx: Complete session persistence workflow - ExportButton.tsx: Modal-based export with format selection - SampleButton.tsx: Probabilistic sampling with result display - ApiKeySettings.tsx: Secure API key management for 4 providers Backend Commands: - apikeys.rs: Store/retrieve/check/delete API keys using Tauri Store - session.rs: Session save/load with file dialogs - export.rs: CSV/JSONL export with metadata - sample.rs: Weighted sampling from distributions Enhancements: - API key validation in useVerbalize hook - Settings button in app header - ~450 lines of CSS with dark mode support - Comprehensive TypeScript types and error handling 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
- Remove unused type imports (ApiKeyResponse, SampleRequest) - Install @tauri-apps/plugin-dialog package for file dialogs - Fix TypeScript compilation errors 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
- Change from 'from handlers.verbalize' to 'from .handlers.verbalize' - Fixes 'No data in response' error when calling verbalize endpoint - Endpoint was returning stub message instead of executing actual logic
Fixed sidecar communication issue where IPC was wrapping payloads in
SidecarRequest{payload} and expecting responses wrapped in
SidecarResponse{data, error}, but FastAPI endpoints expect/return
unwrapped JSON.
Changes:
- Send request payload directly without wrapping
- Parse response directly instead of expecting wrapper structure
- Rebuilt Python sidecar binary with latest code including verbalize handler
This fixes the "No data in response" error when generating distributions.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <[email protected]>
Implemented end-to-end API key flow from Tauri secure storage to Python sidecar: Backend Changes: - Modified verbalize command to retrieve API key from Tauri Store before calling sidecar - Added provider-to-key mapping for openai, anthropic, cohere, openrouter - Pass API key securely in request payload to Python sidecar Python Sidecar Changes: - Added api_key field to VerbRequest model (required) - Updated verbalize handler to pass API key when initializing providers - Providers now receive API key from request instead of environment variables This fixes the "missing field distribution_id" error which was caused by providers failing to initialize without API keys. Now API keys flow securely from Tauri's encrypted store -> Rust backend -> Python sidecar -> LLM provider. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
The sidecar was failing to start due to relative imports not working in PyInstaller executables. Added try/except fallback pattern in main.py: - First tries relative imports (for normal Python execution) - Falls back to absolute imports (for PyInstaller/frozen executables) Also added __main__.py entry point for proper module execution. Note: PyInstaller build still has recursion issues in the dependency tree. Current solution uses fallback imports which work when tested with Python directly but need further investigation for PyInstaller packaging. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Applied fix from Exa search results: increased Python recursion limit in PyInstaller spec file to handle deep dependency trees in FastAPI/Uvicorn. The recursion limit fix (sys.setrecursionlimit(sys.getrecursionlimit() * 5)) allows PyInstaller to successfully analyze and bundle the sidecar with all dependencies without hitting RecursionError. Successfully built vs-bridge sidecar binary - ready for DMG distribution. Also added pydist/ to .gitignore to exclude large binary from version control. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
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Summary
Phase 1 setup complete for Verbalized Sampling Desktop App - a cross-platform Tauri desktop application for visualizing and analyzing LLM sampling distributions.
What's Included
Tauri 2 Project Setup
Project Structure
src/components/,src/hooks/,src/types/,src/utils/src-tauri/with capabilities configuredvs_bridge/structure createdschemas/v1/directorytests/directoriesDependencies
.gitignoreupdated for Rust, Python, and TauriSpecification & Planning
specs/001-sampling-desktop-app/spec.md)specs/001-sampling-desktop-app/plan.md)specs/001-sampling-desktop-app/tasks.md)specs/001-sampling-desktop-app/checklists/quality.md)Tasks Completed
Phase 1: Setup (12/12 tasks)
Architecture
Following the Sidecar Pattern:
Constitution Compliance
✅ All 7 principles validated:
Next Steps
Phase 2: Foundational Infrastructure (34 tasks)
Test Plan
🤖 Generated with Claude Code
Co-Authored-By: Claude [email protected]