# chie-shared TODO
## Status: ✅ Feature Complete
**Metrics (2026-01-18)**
- Tests: 740 (503 unit, 32 fuzz, 28 property, 17 perf, 25 size, 11 compat, 17 schema, 107 doc)
- Type Modules: 16 (~6,400 lines)
- Utility Modules: 12 (~4,200 lines)
- Core Modules: 4 (~3,600 lines)
- Source Code: ~14,000 lines
---
## Implemented Features
### Type System
- [x] **Core Types** - Type aliases, constants, const functions
- [x] **Enums** - ContentCategory, ProofStatus, NodeStatus
- [x] **Validation Types** - Input validation helpers
- [x] **Content Types** - ContentMetadata with builders
- [x] **Bandwidth Types** - BandwidthProof protocol structures
- [x] **API Types** - Responses, errors, cursor pagination
- [x] **Stats Types** - Statistics and metrics
- [x] **Cache Types** - Cache statistics and metrics
- [x] **Profiling Types** - Performance profiling structures
- [x] **Quota Types** - Quota management
- [x] **Batch Types** - Batch operation structures
- [x] **ID Types** - Strongly-typed ID wrappers (ContentId, PeerId, etc.)
- [x] **Fixed Arrays** - Const-generic fixed-size arrays (Blake3Hash, Ed25519Signature)
- [x] **Experiments** - A/B testing and gradual rollout types
- [x] **State Machine** - Phantom types for compile-time state enforcement
### Utilities
- [x] **Calculations** - Mathematical and business calculations
- [x] **Statistics** - Welford's algorithm, exponential backoff, histograms
- [x] **Validation** - Email, URL, peer ID, CID validation
- [x] **Time Windows** - Sliding window rate limiting
- [x] **Circuit Breaker** - Fault tolerance state machine
- [x] **Formatting** - Byte formatting, duration formatting
- [x] **Collections** - Deduplication, partitioning, grouping
- [x] **Security** - Constant-time comparison, hex encoding
- [x] **Network** - Peer ID extraction, bandwidth parsing
- [x] **Time** - Timestamp validation, duration parsing
- [x] **Content** - MIME type classification, file extension extraction
### Configuration
- [x] **Network Config** - P2P network settings with builder
- [x] **Storage Config** - Storage settings with builder
- [x] **Rate Limit Config** - Rate limiting settings
- [x] **Retry Config** - Retry policy with backoff calculation
- [x] **Timeout Config** - Timeout settings (fast/slow presets)
- [x] **Feature Flags** - Runtime feature toggles
- [x] **Config Diff** - Detect configuration changes
- [x] **Config Merge** - Combine configurations with priority
### Core
- [x] **Result Types** - Generic result with error context and telemetry
- [x] **Encoding** - Compact binary encoding with CRC32 and compression
- [x] **Constants** - Protocol constants
### Performance
- [x] **Const Functions** - 41+ configuration functions made const
- [x] **Compile-Time Evaluation** - Zero-cost abstractions
- [x] **Builder Patterns** - Const-evaluable builders
---
## Quality
- Zero compiler warnings
- Zero clippy warnings
- 740 tests passing
- All files under 2000 lines
- Feature-complete
- Production-ready