### Added

- `lib/forge.sh` — the forge selector: `forge_detect` names the forge from
  the runner's own environment, `forge_client` names the client it needs, and
  `forge_preflight` refuses loudly before any sweep when the two disagree
  (#188).
- The reconcilers and `labels-scope` run that preflight first, so a
  GitHub-shaped client on a Forgejo instance is a named refusal instead of a
  sweep that reads nothing and reports success (#188).

### Fixed

- `labels-reconcile` and `labels-scope` no longer exit 0 on a Forgejo
  consumer having read zero facts — measured on `heavy-duty/rig`, where the
  sweep printed `reconciled.` over an empty PR list and scope reported "no
  labeler.yml" for a file that exists (#188).