063cc6b6e6
Runtime peer to the build-time smoke-test.sh: run inside the container after `docker compose up -d --force-recreate` to confirm the new image is live (opencode version matches Dockerfile.variant), persisted named volumes survived, omos skill symlinks resolve, shell defaults re-seeded, and /opt toolkits intact. smoke-test.sh runs with --entrypoint="" and cannot see the running container's volumes/symlinks, hence a separate runtime check. Not run by CI or the entrypoint (it needs the release-time expected version and a running container). Maintainer tooling, not baked into the image. Registered in AGENTS.md File roles. Doc/script-only — no image rebuild.