Two Claude Code sessions, one as PM and one as engineer, built a UI library

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A developer used the cross-session messaging feature in Claude Code, which lets sessions find each other and exchange text messages but not their histories or files. One session acted as product manager, writing specs and reviewing work, while the other implemented them for rind-ui, a headless UI component library. To stop reviews from looping endlessly, the review cap was cut from three rounds to two, and only critical and error findings must be fixed, with warnings moved to a backlog file. Findings were recorded as anchored Reado comments, and tasks closed only when a passing verify command confirmed the fix. The PM session logged 128 tasks, all closed after passing verification.

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