Method processDiff

packages/happy-cli/src/codex/utils/diffProcessor.ts:41–78

* Process a turn_diff message and check if the unified_diff has changed

(unifiedDiff: string)

     * Process a turn_diff message and check if the unified_diff has changed
     */
    processDiff(unifiedDiff: string): void {
        // Check if the diff has changed from the previous value
        if (this.previousDiff !== unifiedDiff) {
            logger.debug('[DiffProcessor] Unified diff changed, sending CodexDiff tool call');
            
            // Generate a unique call ID for this diff
            const callId = randomUUID();
            
            // Send tool call for the diff change
            const toolCall: DiffToolCall = {
                type: 'tool-call',
                name: 'CodexDiff',
                callId: callId,
                input: {
                    unified_diff: unifiedDiff
                },
                id: randomUUID()
            };
            
            this.onMessage?.(toolCall);
            
            // Immediately send the tool result to mark it as completed
            const toolResult: DiffToolResult = {
                type: 'tool-call-result',
                callId: callId,
                output: {
                    status: 'completed'
                },
                id: randomUUID()
            };
            
            this.onMessage?.(toolResult);
        }
        
        // Update the stored diff value
        this.previousDiff = unifiedDiff;
        logger.debug('[DiffProcessor] Updated stored diff');
    }

    /**
     * Reset the processor state (called on task_complete or turn_aborted)