Two Claude Code sessions can work on the same project, but if they edit the same checkout, both operate on the same files. To recover a damaged edit, pause the sessions, inspect Git’s staged and unstaged changes, preserve anything worth keeping, and restore only the affected path from a source you know is correct. For the next parallel task, use a separate Git worktree and branch.
The “60-line fix” in the headline is treated here as an illustrative scenario, not a verified incident or a documented result. Anthropic’s CLI and Git documentation explain the recovery and isolation techniques below, but do not confirm that specific event.
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Can two Claude Code sessions work in the same repo?
Yes. The important distinction is whether the sessions use the same working directory or separate ones. In a shared checkout, both sessions can change the same working files. Session continuity does not protect those files: Anthropic documents commands for continuing a conversation, while its guidance recommends Git as the record of code state and recoverable checkpoints. Anthropic’s CLI reference and prompting best practices cover those respective capabilities.
Git linked worktrees offer a practical alternative for parallel tasks: each task gets its own working directory and can use its own branch. They are not independent clones. A worktree has worktree-specific data such as its HEAD and index, while repository data is shared. The Git worktree manual describes them as “multiple working trees attached to the same repository.”
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| Setup | Working files | Branch and repository relationship | What to coordinate |
|---|---|---|---|
| Two sessions in one checkout | Both use the same directory; edits can overlap directly. | Both affect the checked-out branch and its working tree. | Which session owns each file, and when edits are safe to make. |
| Sessions in separate linked worktrees | Each works in a separate directory. | Tasks can use separate branches, but repository data is shared; worktree-specific HEAD and index are not. |
Branch names, integration of changes, and clean-up after work is complete. |
Separate worktrees reduce direct competition over working files; they do not eliminate integration work or establish a measured reduction in conflicts. Git’s manual illustrates the pattern with an urgent fix in a temporary worktree while development continues elsewhere.
How do I recover a corrupted edit in Git?
First stop both sessions from editing the affected path. Then determine whether the wanted version is in the working tree, the index, or a commit. Git distinguishes the index from the working tree, so “the file” may have more than one relevant version. The Git 2.50.0 restore documentation explains how to restore paths in either place and how to select a source.
1. Pause and preserve
Do not run a restore command until you have saved any uncommitted lines you may need. Copy the file elsewhere or make another suitable backup, and avoid further edits to it during diagnosis. Anthropic recommends Git for tracking state across sessions and emphasizes checkpoints; its guidance says, “Git provides a log of what’s been done and checkpoints that can be restored.” See Anthropic’s state-management guidance.
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2. Inspect the working tree and index
git status --short
git diff -- path/to/file
git diff --cached -- path/to/filegit status --short shows whether the path has changes, while git diff displays unstaged changes and git diff --cached displays staged changes. Use the results to identify which version contains the wanted work before choosing a recovery source.
3. Restore only the damaged path, from a known source
If the version in HEAD is definitely the one you want in the working tree, this restores only that path from HEAD:
git restore --source=HEAD --worktree -- path/to/fileThis discards uncommitted working-tree changes to that path, so preserve or reconcile any useful lines first. The --worktree option makes the target explicit: the command changes the working-tree file, not the index. Without an explicit source, git restore normally takes the working-tree version from the index. To restore the index, use --staged deliberately; by default, that takes the version from HEAD. Git also supports restoring both the index and working tree, but doing so replaces both states. Choose the source and target knowingly rather than treating restore as a general undo button.
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How do I use Git worktrees with Claude Code?
Create a separate linked worktree and branch for the task that needs isolation. The Git manual’s illustrative pattern is:
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git worktree add -b emergency-fix ../temp <base-branch>Replace <base-branch> with the branch or commit you want to start from. Run the second Claude Code session from ../temp, and keep the other task in the original checkout or another worktree. Give each task a clearly defined branch and file ownership so that the separate directories support, rather than obscure, the division of work.
When the fix is complete, review and integrate its branch through your normal Git process. Remove the temporary worktree only after its useful changes are committed or otherwise preserved:
git worktree remove ../tempGit refuses to remove a worktree that has uncommitted changes by default. Check its status before removal; do not force removal as a shortcut around preserving work. Consult the Git worktree manual for the command’s behavior and options.
Can I resume a Claude Code session?
Yes. Anthropic’s CLI reference documents claude -c to continue the most recent conversation and claude -r <session-id> to resume a known session. Resuming brings back conversation context; it does not replace checking the repository’s actual state. Before asking a resumed session to edit, specify the working directory, target branch, files it owns, and expected change. Verify the result with Git status and diffs.
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