The Kubernetes deployment guide now lives only in the wiki
(docs.langbot.app -> Installation -> Kubernetes). Remove the in-repo
docker/README_K8S.md, repoint the README language variants and the
docker-compose / kubernetes.yaml header comments to the wiki, and keep
kubernetes.yaml self-describing via inline comments.
The k8s manifest was missing the Box runtime that backs the sandbox
tools, the activate skill tool, skill add/edit and stdio MCP. Add a
langbot-box Deployment/Service (port 5410), wire langbot to it via
BOX__RUNTIME__ENDPOINT (explicit Service name since the in-container
default langbot_box uses an underscore, invalid for k8s DNS), and share
the Box workspace root as a node hostPath pinned via podAffinity so the
node Docker daemon resolves bind-mount paths consistently. Document the
component, the shared-FS constraint, security implications and readiness
checks in README_K8S.md (zh + en).
