1 rule for Express
Codex instructions for Express: Middleware, Routing and Validation. Append to AGENTS.md. Structure, security, and tests. Express 5.3.0, Nov 2026.
# Express Codex Instructions: Middleware, Routing and Validation
## Install
Install the native export at `AGENTS.md` as an appended section, not a replacement and not a custom agent.
Copy that export, not this catalog file. Catalog fields such as `tools` and `author` are for presets.dev.
Install one skill file per name. Cursor, GitHub Copilot, Codex, Antigravity CLI, and Devin can all read `.agents/skills`, so a second copy with the same name collides.
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# Express Codex Instructions: Middleware, Routing and Validation
Section to append to `AGENTS.md` for Express. This is project guidance, not a custom agent.
## Updated for Express 5.3.0, Nov 2026
Do not upgrade dependencies or the framework version unless the task asks.
## Project shape
Middleware is an ordered ...