Development record

2026-10-22 — While driving, a role the person left unrouted runs on runner.fallback_host, and a role a repository pins to the host refuses the start (facilitator, on delegation, itd-2610222215485265; revised after review round 1): runner.fallback_host is the existing key for the runner that runs a role when abcd has no host session, so no second default is added; when it is unset the person's yes may name the claude runner for that one drive, which is the person's own invocation and so a personal route under RN2; a repository's pin to the host has nowhere to run without one, so the drive refuses before its first move and names the role (grounds: internal/core/runner/config.go; RN2; commands/build.md on host pins)