[docs] Consolidate developer specs into dev.md v5.9

scratchpad/dev.md

@@ -1,7 +1,7 @@
 # Developer Instructions
 
-**Version**: 5.8
-**Last Updated**: 2026-04-11
+**Version**: 5.9
+**Last Updated**: 2026-04-13
 **Purpose**: Consolidated development guidelines for GitHub Agentic Workflows
 
 This document consolidates specifications from the scratchpad directory into unified developer instructions. It provides architecture patterns, security guidelines, code organization rules, and testing practices.
@@ -2812,6 +2812,7 @@ These files are loaded automatically by compatible AI tools (e.g., GitHub Copilo
 ---
 
 **Document History**:
+- v5.9 (2026-04-13): Maintenance tone scan — fixed 10 tone issues across 2 spec files: `go-type-patterns.md` (1 fix: "Easy refactoring"→"Supports refactoring"), `engine-review-summary.md` (9 fixes: "Completed comprehensive deep review"→"Completed deep review", "No comprehensive guide"→"No guide", "Created comprehensive documentation"→"Created documentation", "Comprehensive Implementation Guide"→"Implementation Guide", "quick access to comprehensive engine documentation"→"quick access to engine documentation", "Create comprehensive guide"→"Create guide", "Comprehensive Testing"→"Testing", "The only gap was comprehensive documentation"→"The only gap was documentation", "The comprehensive guide provides everything needed"→"The guide provides the steps needed"). Coverage: 75 spec files (no new files).
 - v5.8 (2026-04-11): Maintenance tone scan — fixed 9 tone issues across 2 spec files: `engine-review-summary.md` (6 fixes: `### Strengths ⭐⭐⭐⭐⭐`→`### Strengths`, `### Interface Design: ⭐⭐⭐⭐⭐ (5/5)`→`### Interface Design`, removed Rating column from Implementation Quality table and replaced "Comprehensive single-file implementation" with "Single-file implementation", `### Security: ⭐⭐⭐⭐⭐ (5/5)`→`### Security`, `### Testing: ⭐⭐⭐⭐⭐ (5/5)`→`### Testing`, `### Documentation: ⭐⭐⭐⭐⭐ (5/5) - After Improvements`→`### Documentation - After Improvements`), `engine-architecture-review.md` (3 fixes: removed 3 `**Rating**: ⭐⭐⭐⭐⭐ (5/5)` lines from Copilot, Claude, Codex, and Custom engine sections). Coverage: 75 spec files (no new files).
 - v5.7 (2026-04-10): Maintenance tone scan — fixed 4 tone issues across 2 spec files: `oh-my-code.md` (3 fixes: "Deep Research Comparison"→"Technical Comparison", "Comprehensive Analysis"→"Analysis", "deep research comparison between"→"compares"), `mdflow-comparison.md` (1 fix: "detailed syntax comparison"→"syntax comparison"). Updated Related Documentation description for `oh-my-code.md`. Coverage: 75 spec files (no new files).
 - v5.6 (2026-04-09): Fixed 4 broken links in `scratchpad/README.md` (case-sensitive file name corrections: `MCP_LOGS_GUARDRAIL.md`→`mcp_logs_guardrails.md`, `SCHEMA_VALIDATION.md`→`schema-validation.md`, `SECURITY_REVIEW_TEMPLATE_INJECTION.md`→`security_review.md`; `campaigns-files.md` marked removed). Fixed 3 tone issues in `README.md` ("Detailed comparison"→"Comparison", "Detailed analysis"→"Analysis", "Complete deep-dive statistical analysis"→"Statistical analysis"). Updated `README.md` last-updated date. Added `README.md` to Related Documentation. Coverage: 75 spec files (no new files).

scratchpad/engine-review-summary.md

@@ -2,7 +2,7 @@
 
 ## Overview
 
-Completed comprehensive deep review of the agentic engine architecture, interface design, and all implementations (Copilot, Claude, Codex, Custom). The architecture is structured for extension and follows established ISP patterns.
+Completed deep review of the agentic engine architecture, interface design, and all implementations (Copilot, Claude, Codex, Custom). The architecture is structured for extension and follows established ISP patterns.
 
 ## What Was Reviewed
 
@@ -64,9 +64,9 @@ Completed comprehensive deep review of the agentic engine architecture, interfac
 
 ### Improvement Completed ✅
 
-**Gap Identified**: No comprehensive guide for adding new engines
+**Gap Identified**: No guide for adding new engines
 
-**Solution Delivered**: Created comprehensive documentation:
+**Solution Delivered**: Created documentation:
 
 1. **`scratchpad/adding-new-engines.md`** (500+ lines)
    - Complete interface documentation
@@ -161,7 +161,7 @@ All implementations follow established patterns and are thoroughly tested.
 
 ## Deliverables
 
-### 1. Comprehensive Implementation Guide
+### 1. Implementation Guide
 **File**: `scratchpad/adding-new-engines.md` (500+ lines)
 
 **Contents**:
@@ -203,13 +203,13 @@ All implementations follow established patterns and are thoroughly tested.
 
 **Changes**:
 - Added reference to `adding-new-engines.md` in "AI Engine & Integration" section
-- Provides quick access to comprehensive engine documentation
+- Provides quick access to engine documentation
 
 ## Recommendations
 
 ### Completed ✅
 
-1. ✅ Create comprehensive guide for adding new engines
+1. ✅ Create guide for adding new engines
 2. ✅ Document interface architecture
 3. ✅ Provide step-by-step implementation guide
 4. ✅ Add testing requirements
@@ -278,10 +278,10 @@ The agentic engine architecture follows SOLID principles, has comprehensive test
 1. **Interface Segregation**: Focused interfaces composed together
 2. **BaseEngine Defaults**: Sensible defaults for all methods
 3. **Shared Helpers**: Reduce duplication and ensure consistency
-4. **Comprehensive Testing**: Automated validation of compliance
+4. **Testing**: Automated validation of compliance
 5. **Clear Patterns**: Consistent, well-documented for straightforward implementation
 
-The architecture **requires no structural changes**. The only gap was comprehensive documentation for adding new engines, which has been addressed with:
+The architecture **requires no structural changes**. The only gap was documentation for adding new engines, which has been addressed with:
 
 - 500+ line implementation guide
 - Step-by-step instructions
@@ -312,4 +312,4 @@ For anyone adding a new engine:
 4. Run tests to validate compliance
 5. Update documentation
 
-The comprehensive guide provides everything needed to successfully add a new engine to gh-aw.
+The guide provides the steps needed to add a new engine to gh-aw.

scratchpad/go-type-patterns.md

@@ -37,7 +37,7 @@ type Version string
 - Self-documenting code - the type name explains the purpose
 - Type safety - prevents mixing different concepts that share the same underlying type
 - Clear intent - signals to readers what the value represents
-- Easy refactoring - can change underlying implementation without affecting API
+- Supports refactoring - can change underlying implementation without affecting API
 
 ### Examples in Codebase