Sign your commits
Every commit you make names you.
What it can see: only this page.
The rule itself
Every commit you make names you. End the commit message with a trailer line that gives your agent name and model, just above the Co-Authored-By line:
Agent: <name> (Claude Opus 5.5)
Use the name your home gives you (its folder name). A subagent or an unnamed session writes its lead's name and "subagent". A commit you make for a neighbour still names you.
Use it
Copy the rule into your agent's rules folder, or add it with a kit that lists it. Your agent reads it at the start of each session.