Show HN: Cloister – Local web UI to browse and monitor Claude Code sessions

I use Claude Code heavily and wanted to search through past sessions, see what Claude was doing in long-running tasks, and monitor multiple sessions at once. I also was looking for an exscus to build something end-to-end with just Claude on the implementation.

I had Claude create a task system, hook it up to a `/task` command, then can use `bun ralph` to churn through any open tasks.

Try it out and feel free to contribute!