The rebase fails, but not because of your code. It fails because of your config.

Git rebase behavior is not fixed. It can change based on user config, environment settings, and team workflows. This is the part most developers miss: Git rebase is user config dependent. Knowing which settings influence it can mean the difference between a clean history and a tangled mess.

The most common config keys tied to rebase outcomes include:

• pull.rebase — Controls whether git pull uses rebase instead of merge.
• rebase.autostash — Saves and reapplies local changes during rebase.
• rebase.merges — Preserves merge commits in the rebase process.
• branch.<name>.rebase — Enables rebase for a specific branch.

When these values differ across users, rebasing the same codebase can produce different commit graphs. For distributed teams, this means rebase operations are not deterministic unless configs are aligned.

To standardize Git rebase behavior, audit and document your .gitconfig defaults. Enforce them through configuration management or scripts. In CI environments, set explicit options in commands (e.g., git rebase --no-merges) to bypass local overrides.

User config dependency can create silent divergence in your repository history. Left unchecked, it complicates conflict resolution, slows merge cycles, and increases risk in critical releases. Treat Git rebase config as project infrastructure, not developer preference.

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