Analyze application logs

Read and analyze structured wide-event logs from the local .evlog/logs/ directory to debug errors, investigate performance issues, and understand application behavior.

When to Use

• User asks to debug an error, investigate a bug, or understand why something failed
• User asks about request patterns, slow endpoints, or error rates
• User asks "what happened" or "what's going on" with their application
• User asks to analyze logs, check recent errors, or review application behavior
• User mentions a specific error message or status code they're seeing

Finding the logs

Logs are written by evlog's file system drain as .jsonl files, organized by date.

Format detection: The drain supports two modes:

• NDJSON (default, pretty: false): One compact JSON object per line. Parse line-by-line.
• Pretty (pretty: true): Multi-line indented JSON per event. Parse by reading the entire file and splitting on top-level objects (e.g. JSON.parse('[' + content.replace(/\}\n\{/g, '},{') + ']')) or use a streaming JSON parser.