When I was a kid in the 80s I noticed a lot of hackers of that era that typed like that. I thought it was strange at the time, but not at all uncommon
<transcript>
Let's see what we've got here.
<selection doc="proposal.md" location="paragraph 3">
The system already...
</selection>
No, I don't like how this is approaching the problem, ...
</transcript>
Then I just send this as a user message. Claude Code (and I'm guessing any of the agentic systems) picks up on the markup very easily. It also helps to label it as a transcript, as it can understand there may be errors, and things like spelling and punctuation are inferred not deliberate. (Some additional instruction is necessary to help it understand, for example, that it should look for homophones that might make more sense in context.)