Hi, one of the cofounders here! We work with a ton of different agents in our other open source project, Rover (
https://endor.dev/rover). Sometimes we need to debug how the agents are behaving and we built this tool to make our life easier. It is a web interface in which you can upload sessions logs that you have exported from Claude, Codex or any other coding agent. You can easily navigate them, check the reasoning, tool calls, etc. as well as explore what subagents were doing. Everything happens local to the browser, so no data is sent to any server.
It can also be used to safely share agent session logs with others, either projects you are contributing to or to troubleshoot something. It has an optional, built-in anonymizer so no private information leaks accidentally.