>discussed with each other

No, the first LLM left a text file that the latter LLMs then read. Since these are memoryless black boxes, any words they happen to pick up along the way is treated as the function to evaluate the output to. There's no fucking collusion here as if it were a rogue hacker group, it's a text predictor that received instructions as it always does and executed those instructions blindly.

You can replace discussed if you want with leaving text files or comments in directory names that other ones then read, if you want, it's just an extremely awkward way of talking.