<m​ilas900:matrix.org> For Fcmp++ is it hard fork or soft fork and do we expect two chains at the end ?

<v​tnerd:monero.social> Hard fork. Two chains if something is contentious, which remains to be seen. OVK may be the trigger, if reddit comments are an indication

The Reddit comments are AI slop

<k​iersten5821:matrix.org> how will i know when to upgrade? if i don't upgrade and send a tx will it nuke my privacy once i upgrade and have to send it again on the hard forked chain?

The software does it automatically at the agreed-upon block height for the hardfork. You'll have like 6 months to download the software that supports it before the fork actually happens

<j​effro256:monero.social> ^^^

<j​effro256:monero.social> As for the privacy issue, your send privacy may be "nuked" depending on what your definition of "nuked" is. If it has been multiple days / weeks since the HF, and you try to spend an output pre-fork, your wallet will likely choose decoys solely from the ring-specific chain. If you then spend that output on the FCMP-specific chain, then it would reveal the output <-> key image asso<clipped message>

<j​effro256:monero.social> ciation, which ruins spend privacy on both chains. You could mitigate this by doing a churn to oneself on both chains before spending.

<j​effro256:monero.social> The wallet decoy selection should, if aware of the upcoming fork, pick all decoys from before the fork if spending an output before the fork