I feel like this is a good use of standups rather than just status updates. "I have started working on X" should ideally be accompanied by "I am planning on doing this using Y and Z" if there is any chance that it could be contentious. There should ideally be no contentions, but the moment any questions come up, they should be tabled for a post-standup huddle amongst the relevant stakeholders.

If you don't do standups, just do the same thing ad-hoc on the team chat channel.

Larger tasks and discussions are probably the purview of RFCs.