OpenAI Codex Plan

https://github.com/openai/openai-cookbook/pull/2185/commits/1669ddc4bd1dacb06b53cca508e6fa6bd8b886a4?short_path=42c7190#diff-42c719056684b76a091ea798b82151fcc1597494d0660ff02753627ef6b0796a

create an execspec for a [something] implementation in the [something]. [something] enables 

us the following:

```rs
end state
```

more instructions

let's go ahead and implement @something_execplan.md