Roughly every three years, the ICAPS conference hosts the International Planning Competition (IPC), in which the participating planning systems compete against each other on a set of planning benchmarks unknown to the participants. In some years, other competitions related to planning are sometimes carried out, for example on proving unsolvability or related ot model engineering.
The planning competitions cover different problem classes like classical planning, planning under uncertainty, planning with time -- or hierarchical planning! These are usually organized in "tracks", so any IPC of a particular years may have multiple tracks, one track per problem class; and multiple sub tracks per main track (such as for partial order HTN systems or total order HTN systems).
The IPC 2027 will again feature tracks on HTN planning. There is no website yet, but it will be linked here once it exist; it will also linked on the overview page of the IPC 2027. Its organizers will be:
The IPC 2023 is the second IPC that features tracks on HTN planning! All information about it can be found on its website: https://ipc2023-htn.github.io/ (or simply ipc2023.hierarchical-task.net). Its organizers were:
In 2020, the IPC covered one track only, which was on Hierarchical Task Network (HTN) planning. It featured however multiple subtracks, one for partially ordered HTN problems, and one for total-order HTN problems. This was the first time HTN planning systems competed against each other in an IPC. For results, competing planning systems (source code and executables), and more -- visit its website: ipc2020.hierarchical-task.net. Its organizers were: