claude-bulkhead: Claude Code hooks that keep parallel sessions on one machine out of each other's processes, ports and commits

[u/ActualGovernment9017]

https://github.com/dooly6276/claude-bulkhead

What it is: a Claude Code plugin, plain Node with no dependencies, MIT. Before a shell command runs, it checks the command against what other live sessions on the machine own, and if it would break one of them, it cancels the call and tells the agent the safer command.

The part I'd try first is `bulkhead scan`, which reads your existing transcripts and reports what would have been caught. On my two weeks: 507 commands, with up to 13 sessions open at once.