# Codebase Functionality Audit - Quick Start
**Status**: ✅ Complete | **Date**: 2025-11-18 | **Scope**: 45+ TypeScript files in src/
## Start Here
Choose your reading style:
### 🚀 I want the quick summary (15 min)
**→ Read**: `FUNCTIONALITY-SUMMARY.txt`
### 🏗️ I want to implement now (30 min + implementation)
**→ Read**: `CLI-REUSE-GUIDE.md`
### 📚 I want all the details (45 min)
**→ Read**: `CODEBASE-FUNCTIONALITY-AUDIT.md`
### 🧭 I'm not sure where to start
**→ Read**: `AUDIT-INDEX.md` (navigation guide)
---
## What Was Found
| Category | Reusable | Missing | Status |
|----------|----------|---------|--------|
| **File System Operations** | 2 ✅ | 1 ❌ | Partial |
| **Configuration Management** | 3 ✅ | 0 | Complete |
| **Lock File Management** | 0 | 1 ❌ | Missing |
| **Audit Logging** | 2 ✅ | 0 | Complete |
---
## Ready to Copy (No Changes Needed)
1. **AuditLogger** (`src/audit-logger.ts`)
- Daily log rotation
- 30-day retention
- JSONL format
- AsyncLock protected
2. **ConfigDiscoveryService** (`src/config-discovery.ts`)
- Multi-source discovery
- Env var overrides
- Zod validation
- Caching
3. **Path Validation** (`src/utils.ts:isAllowedPath()`)
- Symlink resolution
- Path traversal protection
- Async safe
---
## Need to Build
1. **PID-Based Locking** (45 min)
- See: `CLI-REUSE-GUIDE.md` section "Missing 2"
2. **Config File Write** (20 min)
- See: `CLI-REUSE-GUIDE.md` section "Missing 1"
---
## Quick Links
| Document | Purpose | Size | Read Time |
|----------|---------|------|-----------|
| `FUNCTIONALITY-SUMMARY.txt` | Executive summary | 14 KB | 15 min |
| `CODEBASE-FUNCTIONALITY-AUDIT.md` | Full technical details | 25 KB | 45 min |
| `CLI-REUSE-GUIDE.md` | Implementation guide + code | 13 KB | 30 min |
| `AUDIT-INDEX.md` | Navigation & cross-references | 4 KB | 10 min |
---
## Key Findings
✅ **PRODUCTION-READY** implementations found for:
- Audit logging (complete with rotation)
- Configuration discovery & validation
- Path canonicalization & symlink resolution
❌ **NOT FOUND** (need to build):
- PID-based locking
- Config file write service
📋 **TOTAL CODE TO COPY**: 500+ lines
⏱️ **TOTAL IMPLEMENTATION TIME**: 2-3 hours (with copy-paste)
---
## Implementation Roadmap
```
Phase 1 (2-3h): Copy existing components
├─ AuditLogger
├─ ConfigDiscoveryService
├─ Path validation
└─ Tests
Phase 2 (2-3h): Build missing components
├─ PID-based locking
├─ Config file write
└─ Integration tests
Phase 3 (1-2h): Integration
├─ CLI manager
├─ Full system tests
└─ Documentation
TOTAL: 5-8 hours (including testing)
```
---
## Document Structure
```
All at: /home/alexandrueremia/projects/code-executor-mcp/
START HERE: FUNCTIONALITY-SUMMARY.txt (15 min)
↓
DIVE DEEP: CODEBASE-FUNCTIONALITY-AUDIT.md (45 min)
↓
IMPLEMENT: CLI-REUSE-GUIDE.md (30 min + work)
↓
NAVIGATE: AUDIT-INDEX.md (reference)
```
---
## What's In Each Document
### FUNCTIONALITY-SUMMARY.txt
- TL;DR of all findings
- Copy-paste locations with line numbers
- Environment variable reference
- Gotchas & important notes
- Next steps checklist
### CODEBASE-FUNCTIONALITY-AUDIT.md
- 10 detailed sections
- Code snippets
- Reusability analysis
- File reference guide
- Appendices: AsyncLock, env vars
### CLI-REUSE-GUIDE.md
- 3 ready-to-use solutions
- 2 complete implementations (locking, config write)
- Integration pattern
- File copy checklist
- Testing strategy
### AUDIT-INDEX.md
- Cross-references between docs
- Quick lookup guide
- Verification checklist
- Metrics & recommendations
---
## Reuse Summary
### COPY DIRECTLY (10 min)
```
src/audit-logger.ts → Copy class
src/config-discovery.ts → Copy class
src/config-types.ts → Copy schemas
src/utils.ts → Copy functions (isAllowedPath, normalizeError)
src/interfaces/audit-logger.ts → Copy interface
```
### REFERENCE (20 min)
```
src/config.ts → Study access patterns
src/security.ts → Study validation patterns
src/schema-cache.ts → Study AsyncLock patterns
```
### BUILD NEW (90 min)
```
PID-based locking → See CLI-REUSE-GUIDE.md
Atomic config write → See CLI-REUSE-GUIDE.md
CLI manager integration → See CLI-REUSE-GUIDE.md
```
---
## Environment Variables Supported
**Configuration**:
- `CODE_EXECUTOR_CONFIG_PATH` - Override config location
- `MCP_CONFIG_PATH` - Override MCP config location
- `ALLOWED_PROJECTS` - Colon-separated allowed paths
**Audit Logging**:
- `ENABLE_AUDIT_LOG` - Boolean
- `AUDIT_LOG_PATH` - Log directory
- `AUDIT_LOG_RETENTION_DAYS` - Retention in days (1-365, default 30)
**Executors**:
- `DENO_PATH` - Path to deno
- `POOL_MAX_CONCURRENT` - Connection pool size
- `POOL_QUEUE_SIZE` - Queue size
- `POOL_QUEUE_TIMEOUT_MS` - Queue timeout
---
## Key Code Locations
| Need | File | Lines | Status |
|------|------|-------|--------|
| Audit logging | `src/audit-logger.ts` | 74-278 | ✅ Copy |
| Config discovery | `src/config-discovery.ts` | 46-332 | ✅ Copy |
| Path validation | `src/utils.ts` | 172-205 | ✅ Copy |
| Error handling | `src/utils.ts` | 280-321 | ✅ Copy |
| Config schemas | `src/config-types.ts` | 1-108 | ✅ Reference |
---
## Verification
- [x] 45+ files analyzed
- [x] 1000+ lines of code identified
- [x] All findings code-backed with line numbers
- [x] Copy-paste code ready
- [x] Missing components identified + specced
- [x] Complete documentation provided
- [x] Implementation guide included
- [x] Testing strategy documented
---
## Support
**Questions?**
1. Check AUDIT-INDEX.md for cross-references
2. Search in CODEBASE-FUNCTIONALITY-AUDIT.md
3. Look for specific solution in CLI-REUSE-GUIDE.md
**Ready to start?**
→ Go to FUNCTIONALITY-SUMMARY.txt
---
**Generated**: 2025-11-18 | **Status**: ✅ Production-Ready
