Nightly Build / build (push) Successful in 7m52s
The connector verify step built 'docker exec -w <wd> <container> -e K=V sh -c …': docker parses everything after the container name as the COMMAND, so any connector whose manifest declares env/secret failed with exec: "-e": executable file not found. The MCP server launch path in mcp-client already uses the correct order. Extract command construction into build_command() and cover the argument order with regression tests.