Ask Claude to Add Strategic Log Statements at Key Decision Points for Production Debugging

When a production issue hits, the first question is always "what happened?" If your code doesn't log at the right places, you're debugging blind. Claude reads your logic and adds logs where they'll actually help.

"Read the order processing flow and add structured log statements 
at every important decision point"

Claude identifies the moments that matter — where paths diverge, where external services are called, where data changes shape — and adds log statements that capture the context you'll need later:

// Claude adds logs like:
Log::info('Order processing started', ['order_id' => $order->id, 'total' => $order->total]);
Log::info('Payment method selected', ['method' => $method, 'amount' => $amount]);
Log::warning('Inventory check: item low stock', ['product_id' => $id, 'remaining' => 3]);
Log::error('Payment failed', ['order_id' => $order->id, 'error' => $e->getMessage()]);

You can focus on specific areas:

# Authentication flows
"Add logging to the auth flow — every login attempt, token refresh, 
permission check, and session event"

# Payment processing
"Log every step of the payment flow — amount calculation, discount 
application, gateway request, and response handling"

# Background jobs
"Add logging to all queue jobs — when they start, what they process, 
how long they take, and whether they succeed or fail"

# API interactions
"Log every outbound API call — URL, method, request size, response 
status, and latency"

Claude adds logs that are structured and useful:

• Context — includes relevant IDs, amounts, and state so you can trace a request
• Levels — uses info/warning/error appropriately, not everything as info
• Timing — adds duration logging for operations that might be slow
• Structured data — uses key-value pairs, not string concatenation, for searchability

The best time to add logging is before you need it — let Claude instrument the decision points so the logs are there when production breaks at 2am.

via Claude Code