# Building a local viewer for Claude Code sessions

A local session viewer turns Claude Code JSONL logs into checkpoints, tool-call groups, token counts, and side-by-side comparisons.

- Published: 2026-05-12
- Category: case-study
- Tags: claude-code, coding-agents, developer-experience, experiment, observability
- HTML: https://harnez.ai/posts/building-a-session-browser/

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