Repren performs simultaneous multi-pattern search-and-replace across files and directories, including case-preserving identifier transforms and file/directory renames. It is designed for large-scale refactors where many overlapping patterns must be applied atomically and safely.
Use repren for bulk renames, swapping identifiers across a codebase, case-preserving renames, and when you need an atomic dry-run followed by a safe apply with backups. Avoid for single-file edits or language-aware AST refactors.
Useful for agents that can run CLI tools or shell commands (Copilot-style agents, CLI-enabled agents, or any automation agent with access to the uvx runtime).
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