Re-point the re-brand at the new pi-only variant instead of with-pi, so
pi-devbox stays a lean pi-focused image (no opencode) while the pi install
logic still lives in one place upstream. This keeps pi-devbox meaningfully
distinct from opencode-devbox:latest-with-pi.
- Dockerfile: BASE_IMAGE default -> joakimp/opencode-devbox:latest-pi-only.
- smoke-test.sh: size threshold 2900 -> 2750 MB (pi-only = with-pi minus
opencode's ~145 MB binary).
- Docs (README/AGENTS/DOCKER_HUB/CHANGELOG/docker-compose): drop the
'also contains opencode' notes; describe pi-only basis and the distinction
from with-pi.
Publish ordering unchanged: release opencode-devbox first so latest-pi-only
carries the target pi version, then tag here (smoke asserts pi --version).
pi
1d1283f942