Add PowerShell network scanner with multi-agent workflow orchestration

REVIEW_SUMMARY.md

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+# Review Summary: PowerShell Network Device Scanner
+
+**Review Date:** 2025-12-13  
+**Reviewer:** review-agent (Step 4/4)  
+**Status:** ⚠️ **CHANGES REQUESTED**
+
+---
+
+## Quick Summary
+
+The workflow produced **excellent work** but needs **targeted refactoring** for improved maintainability per user's requirement: *"Create isolated functions for all functions for the sake of maintainability"*
+
+---
+
+## Review Results
+
+### Code Review: 🟡 GOOD (Needs Refactoring)
+- **Current:** 13 functions, some with multiple responsibilities
+- **Issue:** 6 functions/areas need refactoring for better isolation
+- **Impact:** Code works correctly but maintainability can be improved
+
+### Test Review: ✅ EXCELLENT
+- **Result:** 28/29 tests passed (96.6%)
+- **Coverage:** All critical requirements validated
+- **Quality:** Comprehensive test suite
+
+### Documentation Review: ✅ OUTSTANDING
+- **Coverage:** 100% (85KB across 4 documents)
+- **Quality:** Professional, clear, production-ready
+- **Accuracy:** Verified against source code
+
+---
+
+## Key Findings: 6 Refactoring Opportunities
+
+### 🔴 High Priority (Must Fix)
+
+**1. Get-DeviceClassification (78 lines)**
+- **Issue:** 4 responsibilities in one function (keyword scoring, port scoring, content scoring, aggregation)
+- **Fix:** Extract 4 helper functions: Get-KeywordScore, Get-PortScore, Get-ContentScore, Get-BestScoringCategory
+- **Impact:** Improves testability, maintainability, and clarity
+
+**2. Get-SubnetFromIP (41 lines)**
+- **Issue:** Line 140 has 200+ character complex inline calculation - nearly unmaintainable
+- **Fix:** Extract 3 helper functions: ConvertTo-PrefixLength, Get-SubnetMaskBytes, Get-NetworkAddressBytes
+- **Impact:** Dramatically improves readability and debuggability
+
+### 🟡 Medium Priority (Should Fix)
+
+**3. Start-NetworkScan (78 lines)**
+- **Issue:** Business logic mixed with UI/display concerns
+- **Fix:** Extract 3 functions: Write-ScanHeader, Invoke-PingSweep, Invoke-DeviceScan
+- **Impact:** Separation of concerns, easier testing
+
+**4. Main Execution Block (62 lines)**
+- **Issue:** 23 lines of display formatting inline in orchestration
+- **Fix:** Extract 3 functions: Show-ScanResults, Show-DeviceDetails, Export-ScanResults
+- **Impact:** Main block becomes pure orchestration
+
+### 🟢 Low Priority (Nice to Have)
+
+**5. Get-HTTPEndpointInfo (70 lines)**
+- **Issue:** HTTP response handling inline in nested loops
+- **Fix:** Extract 2 functions: Read-HTTPResponseContent, Test-HTTPEndpoint
+
+**6. Port List Duplication**
+- **Issue:** Port arrays hardcoded in 5 locations
+- **Fix:** Create global constants: $script:HTTPPorts, $script:CommonAPIPorts
+
+---
+
+## Recommendation
+
+### Action: REQUEST CHANGES
+
+**Minimum Required:**
+- Refactor Get-DeviceClassification (4 new functions)
+- Refactor Get-SubnetFromIP (3 new functions)
+
+**Total Recommended:**
+- Add 15 helper functions
+- Result: 13 → 28 functions (all properly isolated)
+- Estimated effort: 2-4 hours (high priority), 4-6 hours (all changes)
+
+---
+
+## What's Already Excellent ✅
+
+1. **Performance:** ArrayList pattern used correctly (7 instances, zero += violations)
+2. **Security:** Proper SSL callback management with try-finally
+3. **Error Handling:** Comprehensive try-catch throughout
+4. **Tests:** 96.6% pass rate with all critical requirements validated
+5. **Documentation:** 100% feature coverage, professional quality
+6. **Functionality:** All requirements met, code works correctly
+
+---
+
+## Impact of Refactoring
+
+### Before Refactoring
+- 13 functions (some with multiple responsibilities)
+- Functions range 15-78 lines
+- Some complex inline logic
+- Mixed concerns in places
+
+### After Refactoring
+- 28 functions (all single responsibility)
+- Functions average 20-30 lines
+- Clear, isolated logic
+- Proper separation of concerns
+- **Dramatically improved maintainability**
+
+---
+
+## Next Steps
+
+1. **develop-agent:** Implement high-priority refactoring
+2. **test-agent:** Update tests for new helper functions
+3. **document-agent:** Update documentation with new functions
+4. **review-agent:** Re-review after changes
+
+---
+
+## Overall Assessment
+
+**Quality:** ⭐⭐⭐⭐ 4.3/5  
+**Decision:** Changes Requested (Maintainability Focus)  
+**Severity:** Moderate - Code works, but needs refactoring for long-term maintainability  
+
+The workflow produced high-quality work. Targeted refactoring will elevate it from "good" to "excellent" for the user's stated priority: maintainability through function isolation.
+
+---
+
+**See FINAL_REVIEW.md for complete detailed analysis**