Provider contract
Small executables speak JSON-in and exit-code-out, so new backends need no nixpush internals.
The problem
Alerting logic is usually hand-rolled per service, so swapping backends means editing every caller.
NixOS operators who want alerting call sites decoupled from notification backends.
Why it matters
A focused part of the Corbet Nix suite
Stateless default
No daemon and no queue unless a channel explicitly opts into durable spooling.
First-party ntfy
A working curl and jq ntfy provider ships alongside the core channel schema.
Evidence and limits
Inspect the claim, then the mechanism.
Bound to a revision-addressed public source; checks are declared in-tree and CNIX has not reproduced their results.
Project cosmos