codex-keysmith is a Python 3.10+ command-line utility that manages instruction injection for local Codex instances on macOS and Linux. It runs via a single signed release script or git checkout, letting you preview configuration plans with dry-run flags before writing to disk. The tool modifies only downstream session behavior without reading account credentials or altering the core client binary.
If you manage multiple local AI coding agents and want reproducible, auditable system prompts without manual file edits, it is worth a look. However, Windows support remains experimental and unverified, and macOS users will trip over Gatekeeper due to unsigned binaries. Skip it if you prefer managing environment variables and configuration files by hand.
more: https://github.com/Jia-Ethan/codex-keysmith
my other side: ivo.blogspot.com
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