Test downstream projects

Add messaging docs for optional features and kernel subshells (#1045) #1257

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
ipykernel	49s
jupyter_server	4m 9s
nbclient	2m 6s
jupyter_kernel_test	2m 0s
nbconvert	2m 29s
papermill	2m 6s
qtconsole	1m 35s
downstreams_check	2s
	15m 16s