fix(doctor, test-stack-up): no Docker daemon in a cloud container is normal, not a warning

[MendixMau]

What changed and why (one paragraph)

The Claude Code on the web container ships the docker CLI but no running daemon, and the agent cannot start one. bin/doctor.sh (run at scaffold and session start) warned "docker daemon is not responding … sudo systemctl start docker", and its no-runtime text said the build check needs Docker. So sessions tried to start Docker, failed, and reported "cannot start the docker daemon" as a blocker, until the user told them to use mxcli run --local. That contradicted skills/cloud-dev-environment.md, which already says no Docker is needed. Now: in the cloud lane a missing daemon is an ok line saying it is normal, not to start it, the build check is exec.sh's mxbuild gate, and the app runs with ./mxcli run --local (snapshot first). Desktop lanes (Docker or Podman, stopped) keep the WARN and start hint, plus one line that a container is optional. The no-runtime text no longer claims the build check needs Docker. project-bin/test-stack-up.sh, with the app down and no reachable Docker/Podman (bounded probe), stops with the Docker-free route (Studio Pro Run Locally, or ./mxcli run --local) instead of failing inside mxcli docker run.

Field evidence

Run in a real cloud container (docker CLI present, no daemon), same doctor, four combinations:

Lane / runtime	Before	After
cloud, docker, no daemon	WARN + sudo systemctl start docker	ok: "no docker daemon in this cloud container — normal here, and not a blocker. Do not try to start it." + mxbuild gate + mxcli run --local
desktop-like lane, docker stopped	WARN + start hint	unchanged, plus "Not required, if you would rather not run one: …"
desktop-like lane, podman only, stopped	WARN + podman start hint	unchanged, plus the same optional line
cloud, podman only	WARN + podman hint	ok, same cloud text

test-stack-up.sh on a scratch project with the app down and no daemon: stops with "App down and no Docker/Podman reachable …" and the ./mxcli run --local -p <App>.mpr line; mxcli docker run is never called.

Checklist

• No client data (leak guard + denylist grep clean)
• Size cap
• Test tier: tests/wave2/test-doctor-docker-probe.sh updated (desktop cases pin CLAUDE_CODE_REMOTE= so the fixture means the same inside a cloud session; new case 2b asserts the cloud behaviour); its greps replicated by hand against the new doctor output
• Instrument rules: rule 7 in spirit, the report no longer sends the agent at an action it cannot take
• Routing row: n/a
• CHANGELOG line
• Bug entries: n/a

🤖 Generated with Claude Code

https://claude.ai/code/session_01VJgWP5vEoAsNsJYqCDMGNw

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