pub fn pi_beside_pi_acp(cmd: &str) -> Option<String>Expand description
The pi installed next to cmd when cmd is pi-acp, for
PI_ACP_PI_COMMAND (blockcontroller/acp.rs) and the auth check (run_auth_check). Without it pi-acp runs whatever pi is on PATH, often
none (the managed install’s .bin isn’t on PATH) or an older one.
SPEC_PI_HARNESS_VIA_PI_ACP_2026_10_06.md.