I found reference to https://f5cloudsolutions.slack.com/, but I can't just log in to it -- looks like it might require an invitation. Is this a public Slack workspace?
Yes, it's public slackware. Try access with this invitation link : https://join.slack.com/t/f5cloudsolutions/shared_invite/zt-1qkowtc1w-XITBGH42qxIW3OovHDAoOw
For reference for anyone stumbling upon this post, that Slack channel is specific to the F5 Automation Toolchain products.
Some guidance from the AS Github repo: https://github.com/F5Networks/f5-appsvcs-extension
We encourage you to use our Slack channel for discussion and assistance on AS3 templates (click the f5-appsvcs-extension channel). There are F5 employees who are members of this community who typically monitor the channel Monday-Friday 9-5 PST and will offer best-effort assistance. This slack channel community support should not be considered a substitute for F5 Technical Support. See the Slack Channel Statement for guidelines on using this channel.