How to Run Claude Code in Parallel Without Causing Conflicting Edits

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Developers using Claude Code can run parallel AI coding sessions more safely by assigning each task a strictly defined set of files before work begins. If two tasks share a file, they must be sequenced rather than run simultaneously, since separate chat sessions do not prevent conflicting edits on disk. Git worktrees are recommended to create isolated working directories and branches for each task, keeping file state, conversation context, and test execution fully separated. Each session should operate with a tightly scoped prompt that explicitly forbids edits outside its assigned directories, and any session that discovers it needs to touch a shared file should stop and log the blocker instead of expanding scope silently. Handoffs between tasks are documented through recorded file changes and verified test commands rather than chat transcripts, enabling the next engineer or session to resume work from a known, confirmed state.

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