| __x1__ | Archived | Bash, AWK | Ubuntu 16.04 | Single, synchronous script, saving state in text files |
| __x2__ | In-use | Bash, AWK | Debian 10 | Parallel processes: collectors, cache and reporters; passing messages over pipes |
| __x3__ | Scratched | OCaml | Debian 10 | Re-write and refinement of __x2__ |
-| __x4__ | In-dev | Dash, AWK | Debian 10 | Sensors are completely decoupled daemons, cache is a file tree |
+| __x4__ | Prototype | Dash, AWK | Debian 10 | Sensors are completely decoupled daemons, cache is a file tree |
+| __x5__ | In-dev | C | Debian 10 | Re-implementation of __x4__ in C |