An idea: The first two are obviously written as second-person commands, but the third is ambiguous and could be interpreted as a first-person thought. Have you tried the first two without the "you must" and "your", to also change them to sort-of first-person in the same way?
Thanks for this (and to Izkata for the suggestion). I now have about 100 (okay, minor exaggeration, but not as much as you'd like it to be) AGENTS.md/CLAUDE.md files and agent descriptions I will want to systematically validate if shifting toward first person helps adherence for...
I'm realising I need to start setting up an automated test-suite for my prompts...
That's really interesting. I ran this scenario through GPT-5.1 and the reasoning it gave made sense, which essentially boils down to: in tools like Claude Code, Gemini Codex, and other “agentic coding” modes, the model isn’t just generating text, it’s running a planner, and the first-person form conforms to the expectation of a step in a plan, where the other modes are more ambiguous.
My suggestion was just straight text generation and thinking about what the training data might look like (imagining a narrative in a story): Commands between two people might not be followed right away or at all (and may even risk introducing rebellion and doing the opposite), while a first-person perspective is likely self motivation (almost guaranteed to do it) and may even be descriptive while doing it.
Solid intuition. Testing this on antigravity is a chore because I'm not sure if I have to kill the background agent to force a refresh of the GEMINI.md file so I just did it anyway.
In this limited test, seems like the first person makes a difference.