Documents the local zsh chpwd hook + git credential helper that
auto-routes the gh CLI to the personal saravanakumardb1 account
whenever cwd is inside ~/code/mygh/, falling back to the keyring
active account elsewhere.
Captures the setup so it can be reproduced on a new laptop or by
another contributor with similar two-account needs. This is machine-
local config (lives in ~/.zshrc and ~/.gitconfig-personal), so it
intentionally lives in SKILLS/ rather than per-repo AGENTS.md.
