Constant META_KEY_PTYSHELL_GIT_HOOKS_PATH 

pub const META_KEY_PTYSHELL_GIT_HOOKS_PATH: &str = "ptyshell:githookspath";

Block meta on an agent’s PtyShell: the hooks directory, which the PTY spawn sets through GIT_CONFIG_* (blockcontroller::shell::lifecycle). A PTY shell’s env is built from its own block, not from the agent’s, so the setting travels on that block, as gh_guard’s directory does.