Link to the code that reproduces this issue

https://github.com/emonty/next.js

To Reproduce

Run npx @next/codemod agents-md --output AGENTS.md
Inspect the instruction added to AGENTS.md. Execute that command in a clean checkout as-if you are an agent in a sandbox:
npx @next/codemod agents-md --output AGENTS.md

Current vs. Expected behavior

I expect the agent being given the instruction to be able to re-run the instruction successfully.

Provide environment information

Operating System:
  Platform: linux
  Arch: x64
  Version: #12-Ubuntu SMP PREEMPT_DYNAMIC Fri Jan  9 20:46:52 UTC 2026
  Available memory (MB): 31021
  Available CPU cores: 22
Binaries:
  Node: 24.12.0
  npm: 11.6.2
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 16.1.6 // Latest available version is detected (16.1.6).
  eslint-config-next: N/A
  react: 19.2.4
  react-dom: 19.2.4
  typescript: 5.9.3
Next.js Config:
  output: standalone

Which area(s) are affected? (Select all that apply)

Not sure

Which stage(s) are affected? (Select all that apply)

next dev (local)

Additional context

No response