Developer releases 'onwrite' to auto-format files written by scripts and AI agents

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A developer has released onwrite, an open-source tool that brings format-on-save functionality to code generators, shell scripts, and AI coding agents — environments where editors like VS Code cannot intervene. The tool detects existing formatter configurations already present in a repository, such as Prettier, Ruff, or gofmt, and runs them automatically on files the moment they are written. For safety, onwrite never modifies source files directly; it pipes content through formatters via stdin/stdout and only replaces the file atomically if the full formatter chain succeeds. It also includes a watcher mode for processes that cannot be wrapped, a diagnostic command for transparency, and a hook for AI agents like Claude Code to re-read files after formatting changes them. Released as v0.1.0 under the MIT license, onwrite is available for macOS, Linux, and Windows, with install scripts and binaries hosted on GitHub.

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