There is no official timeline for that. Note that Alertmanager is
still pre-1.0. Which officially means there is no guarantee against
breaking changes anyway.
Un-officially, I would expect that the old matchers stay in place
until there will be a grand cleanup of old features that we don't want
to carry into the glorious 1.0 release, after which there will be
official guarantees for the first time.
However, I don't know of any concrete plan when to release
1.0. Personally, I think it should happen soon-ish, but I'm not the
maintainer of the Alertmanager.
--
Björn Rabenstein
[PGP-ID] 0x851C3DA17D748D03
[email]
bjo...@rabenste.in