kno lens

See what Claude Code is actually doing.

AI coding tools read your files, run commands, and edit your code — but you only see the result. kno lens brings observability to AI-assisted development — starting with Claude Code. See every step: what tools ran, what files were touched, what failed, and how each turn unfolded.

Three views for different questions

• Timeline — see the full session laid out. Edit counts, commands, errors, duration, and token usage per turn. Good for reviewing what happened and spotting patterns.
• Lens — follow along as Claude works. Live tool activity, turn-by-turn summaries, elapsed time. Good for monitoring a session in progress.
• Heatmap — see which files were edited across every turn. Good for spotting churn, concentration, and scope creep.

All three support search and filtering by activity type.

Getting started

1. Install the extension
2. Open a workspace where you use Claude Code
3. kno lens connects to your active session automatically

No configuration, no tokens, no accounts. Everything runs locally and read-only.

Use kno lens: Select Session to switch sessions. kno lens: Open Explorer opens the timeline and heatmap.

Privacy

kno lens reads Claude Code's local session files on your machine. It never sends data anywhere. Zero telemetry.

License

MIT