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## Changes Overview This commit includes multiple improvements to the Kiro executor for better stability, API compatibility, and code quality. ## Detailed Changes ### 1. Output Token Calculation Improvement (lines 317-330) - Replace simple len(content)/4 estimation with tiktoken-based calculation - Add fallback to character count estimation if tiktoken fails - Improves token counting accuracy for usage tracking ### 2. Stream Handler Panic Recovery (lines 528-533) - Add defer/recover block in streamToChannel goroutine - Prevents single request crashes from affecting the entire service ### 3. Struct Field Reordering (lines 670-673) - Reorder kiroToolResult struct fields: Content, Status, ToolUseID - Ensures consistency with API expectations ### 4. Message Merging Function (lines 778-780, 2356-2483) - Add mergeAdjacentMessages() to combine consecutive messages with same role - Add helper functions: mergeMessageContent(), blockToMap(), createMergedMessage() - Required by Kiro API which doesn't allow adjacent messages from same role ### 5. Empty Content Handling (lines 791-800) - Add default content for empty history messages - User messages with tool results: "Tool results provided." - User messages without tool results: "Continue" ### 6. Assistant Last Message Handling (lines 811-830) - Detect when last message is from assistant - Create synthetic "Continue" user message to satisfy Kiro API requirements - Kiro API requires currentMessage to be userInputMessage type ### 7. Duplicate Content Event Detection (lines 1650-1660) - Track lastContentEvent to detect duplicate streaming events - Skip redundant events to prevent duplicate content in responses - Based on AIClient-2-API implementation for Kiro ### 8. Streaming Token Calculation Enhancement (lines 1785-1817) - Add accumulatedContent buffer for streaming token calculation - Use tiktoken for accurate output token counting during streaming - Add fallback to character count estimation with proper logging ### 9. JSON Repair Enhancement (lines 2665-2818) - Implement conservative JSON repair strategy - First try to parse JSON directly - if valid, return unchanged - Add bracket balancing detection and repair - Only repair when necessary to avoid corrupting valid JSON - Validate repaired JSON before returning ### 10. HELIOS_CHK Filtering Removal (lines 2500-2504, 3004-3039) - Remove filterHeliosDebugInfo function - Remove heliosDebugPattern regex - HELIOS_CHK fields now handled by client-side processing ### 11. Comment Translation - Translate Chinese comments to English for code consistency - Affected areas: token calculation, buffer handling, message processing