Session Log Analyzer

Parse Claude Code JSONL session logs to understand what happened during a session — tool calls, token usage, errors, subagent trees, and compaction events.

Based on patterns from claude-devtools session parsing engine.

When to Invoke

Skill({ skill: 'session-log-analyzer' });

Use when: debugging failed sessions, analyzing cost/token usage, understanding which tools consumed the most context, tracing subagent execution, detecting where compaction occurred.

Workflow

Step 1: Locate Session Logs

Session logs live at ~/.claude/projects/{encoded-path}/*.jsonl where {encoded-path} is the project directory with / replaced by -.