Claude Share uses file leases to coordinate coding agents — but it's no sandbox
Historical_Dinner_69 · reddit · 2026-10-20
A Reddit dev open-sourced Claude Share (session-share), an MIT-licensed plugin for coordinating multiple developers each running their own Claude Code on one feature.
- Three components: shared tasks & contracts, file leases for ownership, and a live board showing coordination state
- A PreToolUse hook checks Edit/Write/MultiEdit/NotebookEdit against the participant's leases — but the author stresses it's not a filesystem sandbox: other write paths bypass it and the hook fails open if the server errors
- Key takeaway: leases help agents coordinate but don't prove branches integrate; separate checkouts, review, and integration testing still matter
- The author is soliciting feedback on where the boundary should live
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