# Sprint 49 Progress Tracker

This document tracks the implementation progress for Sprint 49 technical debt reduction.

## Overview

- **Sprint Goal**: Reduce technical debt from 27.2 hours to ≤15 hours
- **Start Date**: October 23, 2025
- **End Date**: October 27, 2025
- **Starting Metrics**:
  - SATD Violations: 46
  - Technical Debt: 27.2 hours
  - High-severity violations: 5
  - Medium-severity violations: 2
  - Low-severity violations: 39

## Implementation Progress

### Phase 1: High Severity Violations

#### 1. Mutation Executor Resilience (HIGH, 3.5 hours)
- **Status**: ✅ Completed
- **File**: `server/src/services/mutation/executor.rs`
- **Tasks**:
  - [x] Implement MutantGuard RAII pattern for file restoration
  - [x] Add signal handler for graceful interruptions
  - [x] Implement state persistence for resumable testing
  - [x] Add detailed progress tracking
  - [x] Update tests to verify file restoration
- **Implementation Details**:
  - Created `guard.rs` with RAII-based MutantGuard for guaranteed file restoration
  - Created `state.rs` with MutationState for resumable testing
  - Added signal handling for SIGINT and SIGTERM
  - Implemented periodic state saving with configurable intervals
  - Added progress reporting with completion percentage

#### 2. Distributed Testing Safety (HIGH, 2 hours)
- **Status**: ✅ Completed
- **File**: `server/src/services/mutation/distributed.rs`
- **Tasks**:
  - [x] Implement WorkerTempFile with RAII cleanup
  - [x] Add worker state monitoring and metrics
  - [x] Implement heartbeat mechanism
  - [x] Add proper error boundaries for workers
  - [x] Add graceful shutdown support
- **Implementation Details**:
  - Created `temp_file.rs` with RAII-based WorkerTempFile for guaranteed cleanup
  - Created `worker_monitor.rs` with comprehensive monitoring system
  - Added worker health tracking with stall detection
  - Implemented heartbeat mechanism using tokio::select
  - Added signal handling for graceful shutdown
  - Added detailed worker metrics and health reporting

#### 3. Deep WASM Analysis (HIGH, 2.5 hours)
- **Status**: ⏳ Not Started
- **File**: `server/src/services/deep_wasm/service.rs`
- **Tasks**:
  - [ ] Implement disassembly support for WASM functions
  - [ ] Add function table analysis
  - [ ] Implement pattern detection
  - [ ] Add WAT text format support
  - [ ] Update tests to verify WASM analysis

### Phase 2: Context.rs Improvements

#### 1. Core Languages (MEDIUM, 5 hours)
- **Status**: ⏳ Not Started
- **File**: `server/src/services/context.rs`
- **Tasks**:
  - [ ] Implement C analyzer (lines 770-775)
  - [ ] Implement C++ analyzer (lines 776-782)
  - [ ] Implement Ruby analyzer (lines 804-816)
  - [ ] Implement Shell script analyzer (lines 854-859)
  - [ ] Add tests for each analyzer

#### 2. Functional Languages (LOW, 4 hours)
- **Status**: ⏳ Not Started
- **File**: `server/src/services/context.rs`
- **Tasks**:
  - [ ] Implement Haskell analyzer (lines 880-885)
  - [ ] Implement OCaml analyzer (lines 887-892)
  - [ ] Implement Erlang analyzer (lines 826-831)
  - [ ] Implement Elixir analyzer (lines 833-838)
  - [ ] Add tests for each analyzer

#### 3. WebAssembly (MEDIUM, 2 hours)
- **Status**: ⏳ Not Started
- **File**: `server/src/services/context.rs`
- **Tasks**:
  - [ ] Implement WebAssembly analyzer (lines 861-866)
  - [ ] Add support for both WAT and WASM formats
  - [ ] Coordinate with deep_wasm improvements
  - [ ] Add tests for WASM analyzer

### Phase 3: Deep Context Enhancements

#### 1. Multi-Language Support (MEDIUM, 3 hours)
- **Status**: ⏳ Not Started
- **File**: `server/src/services/deep_context.rs`
- **Tasks**:
  - [ ] Implement analyze_multi_language_project method
  - [ ] Add language detection by file extension
  - [ ] Create language-specific extension mappings
  - [ ] Build combined project summary across languages

#### 2. Quality Metrics (MEDIUM, 2 hours)
- **Status**: ⏳ Not Started
- **File**: `server/src/services/deep_context.rs`
- **Tasks**:
  - [ ] Implement calculate_multi_language_quality method
  - [ ] Add language-specific metrics tracking
  - [ ] Implement weighted quality scoring
  - [ ] Calculate technical debt estimates by language

## Current Progress

- **SATD Violations Fixed**: 6/46 (13.0%)
- **Technical Debt Reduced**: 5.5/12.2 hours (45.1%)
- **High-severity violations fixed**: 2/5 (40%)
- **Implementation Completed**: 30%

## Blockers and Risks

- None identified yet

## Next Steps

1. Implement WebAssembly disassembly and analysis in deep_wasm/service.rs
2. Begin implementing language analyzers in context.rs, starting with C/C++ and Ruby
3. Implement multi-language support in deep_context.rs

## Conclusion

Sprint 49 technical debt reduction is making excellent progress, with nearly half of the targeted technical debt eliminated. We've successfully addressed the two highest priority issues:

1. **Mutation Executor Resilience**: Implemented MutantGuard RAII pattern and added resumable testing with state persistence, ensuring files are always restored even when processes are interrupted.

2. **Distributed Testing Safety**: Created a comprehensive worker monitoring system with heartbeats, health tracking, and graceful shutdown capabilities. Added WorkerTempFile for safe file handling in distributed environments.

These improvements provide much more resilient mutation testing framework that can handle interruptions, failures, and resource constraints gracefully. The implementation follows modern Rust best practices, using RAII patterns, tokio's async features, and proper error handling throughout.

The next steps will focus on implementing WebAssembly analysis capabilities and the remaining language analyzers to further enhance our multi-language support.