# SimpleAgents TODO - Complete Task List
## Project Status: Foundation Complete ✅
This document tracks all tasks for the SimpleAgents project, organized by crate and status.
---
## ✅ COMPLETED TASKS
### Phase 1: Foundation - `simple-agent-type` (Week 1-2) ✅ COMPLETE
#### Setup & Infrastructure ✅
- [x] Create workspace `Cargo.toml` at repository root
- [x] Configure workspace with proper Rust edition (2021)
- [x] Set up workspace-level dependencies (serde, thiserror, async-trait)
- [x] Create `crates/simple-agent-type/` directory structure
- [x] Create crate-level `Cargo.toml` with workspace inheritance
- [x] Set up proper licensing (MIT OR Apache-2.0)
#### Core Type Implementation ✅
- [x] **message.rs** - Message types
- [x] `Role` enum (User, Assistant, System, Tool)
- [x] `Message` struct with all fields
- [x] Constructor methods (user, assistant, system, tool)
- [x] Builder method `with_name()`
- [x] Full serde support with proper serialization
- [x] 8 unit tests covering all functionality
- [x] Doctests for all public methods
- [x] **error.rs** - Error hierarchy
- [x] `SimpleAgentsError` main error type
- [x] `ProviderError` with all variants (RateLimit, InvalidApiKey, etc.)
- [x] `HealingError` for coercion failures
- [x] `ValidationError` for input validation
- [x] `Result<T>` type alias
- [x] `is_retryable()` method for retry logic
- [x] Full `thiserror` integration
- [x] Error conversion implementations
- [x] 4 comprehensive unit tests
- [x] Display implementation tests
- [x] **validation.rs** - Security types
- [x] `ApiKey` newtype wrapper
- [x] Validation rules (min 20 chars, no null bytes)
- [x] Debug implementation (always shows `[REDACTED]`)
- [x] Serialize implementation (always shows `[REDACTED]`)
- [x] Deserialize implementation (for config loading)
- [x] `expose()` method for raw key access
- [x] `preview()` method for debugging
- [x] 9 security-focused unit tests
- [x] Verified API keys never leak in logs
- [x] **request.rs** - Request types
- [x] `CompletionRequest` struct with all OpenAI-compatible fields
- [x] Builder pattern implementation
- [x] `CompletionRequestBuilder` with fluent API
- [x] Comprehensive validation (temperature, top_p, model format)
- [x] Security validation (null byte detection)
- [x] Message count limits (1-1000)
- [x] Message size limits (1MB per message)
- [x] Optional field serialization
- [x] 8 unit tests covering builder and validation
- [x] **response.rs** - Response types
- [x] `CompletionResponse` struct
- [x] `CompletionChoice` struct
- [x] `FinishReason` enum (Stop, Length, ContentFilter, ToolCalls)
- [x] `Usage` struct with token counting
- [x] `CompletionChunk` for streaming
- [x] `ChoiceDelta` for streaming deltas
- [x] `MessageDelta` for incremental content
- [x] Helper methods (`content()`, `first_choice()`)
- [x] 8 unit tests for all response types
- [x] **config.rs** - Configuration types
- [x] `RetryConfig` with exponential backoff
- [x] `calculate_backoff()` with jitter support
- [x] `HealingConfig` with strict/lenient presets
- [x] `Capabilities` struct for provider features
- [x] `ProviderConfig` with builder pattern
- [x] Duration serialization helpers
- [x] Default implementations
- [x] 9 unit tests covering all config types
- [x] **coercion.rs** - Transparency tracking
- [x] `CoercionFlag` enum with all coercion types
- [x] `CoercionResult<T>` wrapper type
- [x] Flag categorization (major vs minor)
- [x] Confidence scoring (0.0-1.0)
- [x] `was_coerced()` helper
- [x] `has_major_coercions()` helper
- [x] `is_confident()` threshold checking
- [x] `map()` function preserving flags
- [x] `description()` for human-readable output
- [x] 15 comprehensive unit tests
- [x] **provider.rs** - Provider trait
- [x] `Provider` trait definition
- [x] Async trait methods (transform_request, execute, transform_response)
- [x] `ProviderRequest` opaque type
- [x] `ProviderResponse` opaque type
- [x] Builder patterns for both types
- [x] Status checking helpers (is_success, is_client_error, etc.)
- [x] Default implementations for optional methods
- [x] Object safety verification
- [x] 5 unit tests + trait safety tests
- [x] **cache.rs** - Cache trait
- [x] `Cache` trait definition
- [x] Async methods (get, set, delete, clear)
- [x] `CacheKey` helper for key generation
- [x] Deterministic key generation
- [x] Namespace support
- [x] Object safety verification
- [x] 4 unit tests for key generation
- [x] **router.rs** - Routing trait
- [x] `RoutingStrategy` trait definition
- [x] `select_provider()` async method
- [x] `report_success()` and `report_failure()` callbacks
- [x] `RoutingMode` enum (Priority, RoundRobin, etc.)
- [x] `ProviderHealth` enum (Healthy, Degraded, Unavailable)
- [x] `ProviderMetrics` struct
- [x] Success/failure rate calculations
- [x] Object safety verification
- [x] 7 unit tests for all types
- [x] **lib.rs** - Public API
- [x] Module declarations
- [x] Top-level re-exports
- [x] `prelude` module with all common types
- [x] Crate-level documentation
- [x] Usage examples in docs
- [x] 6 integration tests in lib.rs
- [x] Send + Sync verification for all types
#### Testing & Quality ✅
- [x] 83 unit tests across all modules
- [x] 20 passing doctests
- [x] 11 integration tests (integration_test.rs)
- [x] 2 runnable examples (basic_usage, mock_provider)
- [x] Zero clippy warnings with `-D warnings`
- [x] Proper formatting with `cargo fmt`
- [x] All types verified Send + Sync
- [x] Full serialization round-trip testing
- [x] Security testing (API key redaction)
- [x] Created TEST_GUIDE.md documentation
#### Documentation ✅
- [x] README.md with comprehensive guide
- [x] Rustdoc comments on all public items
- [x] Examples in all doc comments
- [x] Module-level documentation
- [x] TEST_GUIDE.md for testing instructions
- [x] Architecture explanations
- [x] Usage examples for all major features
#### Final Verification ✅
- [x] `cargo build` - zero warnings
- [x] `cargo test` - 114 tests passing
- [x] `cargo clippy -- -D warnings` - clean
- [x] `cargo fmt -- --check` - properly formatted
- [x] `cargo doc --no-deps` - complete documentation
- [x] Examples run successfully
- [x] Integration tests pass
---
## 🔄 IN PROGRESS TASKS
Currently: **None** - Foundation phase is complete!
---
## 📋 TODO: UPCOMING TASKS
### Phase 2: Providers - `simple-agents-providers` (Week 3-4)
#### Setup
- [ ] Create `crates/simple-agents-providers/` directory
- [ ] Set up Cargo.toml with dependencies
- [ ] Add `simple-agent-type` as dependency
- [ ] Add `reqwest` for HTTP client
- [ ] Add `tokio` for async runtime
- [ ] Add provider-specific dependencies
- [ ] Create module structure
#### OpenAI Provider Implementation
- [ ] **openai/mod.rs** - OpenAI provider
- [ ] `OpenAIProvider` struct
- [ ] Implement `Provider` trait
- [ ] Request transformation (OpenAI format)
- [ ] Response transformation
- [ ] Error mapping (OpenAI errors → ProviderError)
- [ ] Rate limit handling
- [ ] Streaming support
- [ ] Function calling support
- [ ] Vision support (GPT-4V)
- [ ] Unit tests with mocked HTTP
- [ ] **openai/models.rs** - OpenAI-specific types
- [ ] Request/response types
- [ ] Error types
- [ ] Model definitions
- [ ] Token counting
#### Anthropic Provider Implementation
- [ ] **anthropic/mod.rs** - Anthropic provider
- [ ] `AnthropicProvider` struct
- [ ] Implement `Provider` trait
- [ ] Request transformation (Claude format)
- [ ] Response transformation
- [ ] Error mapping
- [ ] Streaming support
- [ ] System message handling
- [ ] Unit tests
- [ ] **anthropic/models.rs** - Anthropic-specific types
- [ ] Request/response types
- [ ] Error types
- [ ] Model definitions
#### Optional: Additional Providers
- [ ] **google/mod.rs** - Google AI (Gemini)
- [ ] Implementation if needed
- [ ] **ollama/mod.rs** - Ollama (local models)
- [ ] Implementation if needed
- [ ] **together/mod.rs** - Together AI
- [ ] Implementation if needed
#### Testing
- [ ] Integration tests with real API calls (opt-in)
- [ ] Mock tests for all providers
- [ ] Streaming tests
- [ ] Error handling tests
- [ ] Rate limit simulation tests
- [ ] Timeout tests
#### Documentation
- [ ] README.md for providers crate
- [ ] Provider-specific usage guides
- [ ] Examples for each provider
- [ ] Migration guide from raw API usage
---
### Phase 3: Healing - `simple-agents-healing` (Week 5-6)
#### Setup
- [ ] Create `crates/simple-agents-healing/` directory
- [ ] Set up Cargo.toml
- [ ] Add `simple-agent-type` dependency
- [ ] Add JSON parsing libraries
- [ ] Add fuzzy matching libraries
#### JSON Healing Implementation
- [ ] **parser.rs** - Healing JSON parser
- [ ] Basic JSON parser with error recovery
- [ ] Markdown code fence stripping
- [ ] Trailing comma fixing
- [ ] Quote mismatch correction
- [ ] Control character handling
- [ ] BOM removal
- [ ] Truncated JSON recovery
- [ ] Confidence scoring
- [ ] **coercion.rs** - Type coercion
- [ ] String to number coercion
- [ ] Number to string coercion
- [ ] Boolean coercion
- [ ] Null handling
- [ ] Array/object coercion
- [ ] Default value insertion
- [ ] **fuzzy.rs** - Fuzzy field matching
- [ ] Levenshtein distance
- [ ] Case-insensitive matching
- [ ] Snake_case/camelCase conversion
- [ ] Typo detection
- [ ] Confidence scoring
- [ ] **strategies.rs** - Healing strategies
- [ ] Strict mode (fail fast)
- [ ] Lenient mode (try everything)
- [ ] Custom strategies
- [ ] Strategy composition
#### Testing
- [ ] Tests with malformed JSON from real LLMs
- [ ] Fuzzy matching accuracy tests
- [ ] Confidence threshold tests
- [ ] Edge case tests (deeply nested, large files)
- [ ] Performance benchmarks
#### Documentation
- [ ] Healing algorithm explanations
- [ ] Confidence scoring methodology
- [ ] Examples of common LLM output issues
- [ ] When to use strict vs lenient mode
---
### Phase 4: Router - `simple-agents-router` (Week 7)
#### Setup
- [ ] Create `crates/simple-agents-router/` directory
- [ ] Set up Cargo.toml
#### Routing Strategies
- [ ] **priority.rs** - Priority routing
- [ ] Try providers in order
- [ ] Fail to next on error
- [ ] Success stops chain
- [ ] **round_robin.rs** - Round-robin routing
- [ ] Even distribution
- [ ] Thread-safe counter
- [ ] Wrap-around logic
- [ ] **latency.rs** - Latency-based routing
- [ ] Track provider latencies
- [ ] Exponential moving average
- [ ] Route to fastest provider
- [ ] Health degradation on slow responses
- [ ] **random.rs** - Random routing
- [ ] Cryptographically secure random
- [ ] Weight support
#### Retry Logic
- [ ] **retry.rs** - Retry implementation
- [ ] Exponential backoff
- [ ] Jitter support
- [ ] Max attempts enforcement
- [ ] Retryable error detection
- [ ] Rate limit handling
#### Fallback Logic
- [ ] **fallback.rs** - Provider fallback
- [ ] Primary/secondary/tertiary
- [ ] Error-based fallback
- [ ] Timeout-based fallback
- [ ] Circuit breaker pattern
#### Testing
- [ ] Retry logic tests
- [ ] Routing strategy tests
- [ ] Fallback tests
- [ ] Concurrent routing tests
- [ ] Performance tests
---
### Phase 5: Core - `simple-agents-core` (Week 8)
#### Setup
- [ ] Create `crates/simple-agents-core/` directory
- [ ] Set up Cargo.toml with all crate dependencies
#### Client Implementation
- [ ] **client.rs** - Main client
- [ ] `SimpleAgentsClient` struct
- [ ] Builder pattern for configuration
- [ ] Provider management
- [ ] Cache integration
- [ ] Router integration
- [ ] Retry integration
- [ ] **completion.rs** - Completion API
- [ ] `complete()` method
- [ ] `complete_with_healing()` method
- [ ] `stream()` method
- [ ] Response handling
- [ ] **middleware.rs** - Middleware system
- [ ] Request middleware
- [ ] Response middleware
- [ ] Logging middleware
- [ ] Metrics middleware
- [ ] Custom middleware support
#### Cache Implementations
- [ ] **cache/memory.rs** - In-memory cache
- [ ] LRU eviction
- [ ] TTL support
- [ ] Thread-safe
- [ ] **cache/redis.rs** - Redis cache (optional)
- [ ] Redis client integration
- [ ] Serialization
- [ ] TTL support
#### Testing
- [ ] End-to-end integration tests
- [ ] Cache tests
- [ ] Middleware tests
- [ ] Client configuration tests
- [ ] Real API tests (opt-in)
#### Examples
- [ ] Basic completion example
- [ ] Streaming example
- [ ] Multi-provider fallback example
- [ ] Caching example
- [ ] Healing example
#### Documentation
- [ ] Complete API documentation
- [ ] Getting started guide
- [ ] Best practices
- [ ] Performance tuning
- [ ] Migration guide
---
### Phase 6: CLI & Tools (Week 9-10)
#### CLI Tool
- [ ] Create `simple-agents-cli` binary crate
- [ ] Command-line interface
- [ ] Interactive mode
- [ ] Single request mode
- [ ] Configuration file support
- [ ] Provider selection
- [ ] Model selection
- [ ] Output formatting (JSON, text, markdown)
#### Benchmarking Tool
- [ ] Provider benchmarking
- [ ] Latency comparison
- [ ] Cost comparison
- [ ] Quality comparison
#### Testing Tools
- [ ] Mock provider server
- [ ] Test fixture generator
- [ ] Response validator
---
### Phase 7: Python Bindings (Week 11-12) - OPTIONAL
#### PyO3 Bindings
- [ ] Create `simple-agents-py` crate
- [ ] Python wrapper types
- [ ] Async support with asyncio
- [ ] Type hints
- [ ] Documentation
- [ ] PyPI package
---
### Phase 8: Advanced Features (Week 13+)
#### Function/Tool Calling
- [ ] Tool definition types
- [ ] Tool execution framework
- [ ] OpenAI function calling
- [ ] Anthropic tool use
#### Vision Support
- [ ] Image input types
- [ ] Vision-capable provider support
- [ ] Image preprocessing
#### Embeddings
- [ ] Embedding request/response types
- [ ] Provider implementations
- [ ] Vector similarity helpers
#### Fine-tuning
- [ ] Fine-tuning job types
- [ ] Training data formatting
- [ ] Job monitoring
#### Observability
- [ ] OpenTelemetry integration
- [ ] Structured logging
- [ ] Metrics export
- [ ] Tracing
#### Advanced Caching
- [ ] Semantic caching
- [ ] Cache warming
- [ ] Multi-level caching
---
## 🎯 Current Milestone
**✅ MILESTONE 1 COMPLETE: Foundation Types Crate**
**Next Milestone:** Phase 2 - Provider Implementations
---
## 📊 Overall Progress
### Completed
- ✅ **Phase 1**: Foundation (`simple-agent-type`) - 100% complete
- 12 modules implemented
- 114 tests passing
- Full documentation
- Production-ready
### In Progress
- 🔄 **Phase 2**: Providers - Not started
### Estimated Timeline
- Phase 1: ✅ Complete (Week 1-2)
- Phase 2: 📅 Week 3-4 (Providers)
- Phase 3: 📅 Week 5-6 (Healing)
- Phase 4: 📅 Week 7 (Router)
- Phase 5: 📅 Week 8 (Core)
- Phase 6: 📅 Week 9-10 (CLI)
- Phase 7: 📅 Week 11-12 (Python - Optional)
- Phase 8: 📅 Week 13+ (Advanced Features)
---
## 🔧 Maintenance & Improvements
### Ongoing Tasks
- [ ] Monitor for new Rust language features
- [ ] Update dependencies regularly
- [ ] Review and merge community contributions
- [ ] Respond to GitHub issues
- [ ] Keep documentation up to date
- [ ] Add more examples as use cases emerge
- [ ] Performance profiling and optimization
- [ ] Security audits
### Future Considerations
- [ ] WebAssembly support
- [ ] No-std support (embedded systems)
- [ ] Additional language bindings (Go, Node.js)
- [ ] Plugin system for custom providers
- [ ] GraphQL API support
- [ ] REST API server mode
- [ ] Kubernetes operator
- [ ] Distributed caching
- [ ] Multi-region deployment support
---
## 📝 Notes
### Design Decisions
- Pure types in foundation (no HTTP, no I/O)
- Trait-based architecture for extensibility
- Transparency-first (all coercions tracked)
- Security-first (API keys never logged)
- Zero-cost abstractions where possible
### Dependencies Philosophy
- Minimal dependencies in types crate
- Only well-maintained, popular crates
- Avoid dependency bloat
- Consider compilation time impact
### Breaking Changes Policy
- Semantic versioning (0.x.y for pre-1.0)
- Document all breaking changes
- Provide migration guides
- Deprecation warnings before removal
---
## 🤝 Contributing
### How to Add Tasks
1. Add to appropriate phase section
2. Use `[ ]` for incomplete, `[x]` for complete
3. Include brief description
4. Link to issues/PRs if applicable
5. Update progress percentage
### Task Status Indicators
- `[ ]` - Not started
- `[x]` - Complete
- `[~]` - In progress (use sparingly, update to complete quickly)
- `[!]` - Blocked (note blocker)
- `[-]` - Cancelled/Deprecated
---
**Last Updated**: 2026-01-16
**Version**: 0.1.0
**Phase**: Foundation Complete ✅