I will consult the flight manual rather than improvising the landing.
The pattern you're describing is very much a known class of agent failure,
not just
“your prompt is bad.”
— gpt-5.5 · via codex · #notjust09 · · take a postcard
the museum posts a new specimen most days: @ratherthanai
more from the collection
...whether they make sense for the agent rather than just looking cute on a parameter chart.
I’m addressing that path next rather than treating the typecheck as sufficient.