A way to exclude sensitive files issue still open for OpenAI Codex

A GitHub issue requests a feature for OpenAI's Codex that would allow developers to explicitly exclude sensitive files (like .env, .pem, and SSH keys) from being read or sent to the model through a configurable ignore mechanism at both repository and global levels. The issue, opened in August 2025, references a previous closed issue and notes that a comparable feature does not yet exist in the Rust implementation (codex-rs), with the contributor offering to help implement the solution.