I have not used Claude. But my experience with Gemini and aider is that multiple instances of agents will absolutely stomp over each other. Even in a single sessions overwriting my changes after telling the agent that I did modifications will often result in clobbering.

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allan_s 2 days ago | parent | next [-]

See the agent as a coworker ssh-ing on your machine, how would you work efficiently ? By working on the same directory ? No

You give each agent a git worktree and if you want to check, you checkout their branch.

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someguyiguess a day ago | parent | prev | next [-]

You should try Claude opus 4.5 then. I haven’t had that issue. The key is you need to have well defined specs and detailed instructions for each agent.

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adam_patarino 2 days ago | parent | prev [-]

Proper sandboxing can fix this. But I didn’t see op mention it which I thought was weird

	▲	marcsto2 a day ago \| parent [-]
		Op mentions in the follow up comments that he does a separate git checkout, one for each of the 5 Claude Code agents he runs. So each is independent and when PRs get submitted that's where the merging happens.