FYI, in case anyone else is looking for an updated version, it does exist:

Fertile Fields PRF Automated Composter
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2833620492

Any chance for 1.3/Ideology update as well? Thanks regardless.

Experimental update for 1.2 posted. 1.1 unchanged. Post comments if you find a problem.

If you take a look at the xml for the auto-composter, you'll see <designationCategory>RFF_Farm</designationCategory>.

All I can suggest is to try it without docworld and see what happens.

Verse.AI.JobDriver:DriverTick()
Verse.AI.Pawn_JobTracker:JobTrackerTick()
Verse.Pawn:DMD<DMD<Tick_Patch2>?1009591424::Tick_Patch2>(Pawn)
AIRobot.X2_AIRobot:Tick()
Verse.TickList:DMD<DMD<Tick_Patch2>?1396368000::Tick_Patch2>(TickList)
Verse.TickManager:DMD<DMD<DoSingleTick_Patch2>?-154396416::DoSingleTick_Patch2>(TickManager)
Verse.TickManager:TickManagerUpdate()
Verse.Game:UpdatePlay()
Verse.Root_Play:Update()
heres the error in question
delete these messages if you feel iike its too spammy
also i hate character limits

RimWorld.Blueprint.DMD<DMD<TryReplaceWithSolidThing_Patch0>?-1170407424::TryReplaceWithSolidThing_Patch0>(RimWorld.Blueprint,Verse.Pawn,Verse.Thing&,bool&)
at RimWorld.Toils_Construct+<>c__DisplayClass0_0.<MakeSolidThingFromBlueprintIfNecessary>b__0 () [0x00059] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
at Verse.AI.JobDriver.TryActuallyStartNextToil () [0x001df] in <0ee2c524c4be441e9b7f8bfcb20aca6f>:0
Verse.Log:Error(String, Boolean)
Verse.AI.JobUtility:TryStartErrorRecoverJob(Pawn, String, Exception, JobDriver)
Verse.AI.JobDriver:TryActuallyStartNextToil()
Verse.AI.JobDriver:ReadyForNextToil()

well when i was checking under rimmsqol the entry for the auto composter listed it catagories as none
https://gist.github.com/4c7dca804d9f5bc4efba7c72a546c2eb here the log
JobDriver threw exception in initAction for pawn Builder Bot 4 driver=JobDriver_HaulToContainer (toilIndex=7) driver.job=(HaulToContainer (Job_1414820) A=Thing_PRFRoboticArm1244928 B=Thing_Blueprint_PRFComposter1222879 C=Thing_Blueprint_PRFComposter1222879)
System.NullReferenceException: Object reference not set to an instance of an object
at (wrapper dynamic-method) Verse.ThingMaker.DMD<DMD<MakeThing_Patch1>?256022784::MakeThing_Patch1>(Verse.ThingDef,Verse.ThingDef)
at (wrapper dynamic-method) RimWorld.Blueprint_Build.DMD<DMD<MakeSolidThing_Patch1>?1036777600::MakeSolidThing_Patch1>(RimWorld.Blueprint_Build)
at (wrapper dynamic-method)

Also, I just got my pawns to build a new one, no problem. Sounds like another mod conflict.

Are you sure docworld didn't stuff it together with the basic composter? According to its workshop page, it does that for some things. I placed the Auto-Composter in the Farming menu. Try without docworld. If that works, you'll know it's his problem.

first while using docworld i had to RIMMSqol it in to a build menu
second ran in to an issue where builders would bring items to the blueprint but not actually be able to add them to the blueprint
could be related
will grab logs if needed

I may be necroing a bit, but I have discovered, Growing Drones from PRF - Drones WILL fertilize fields.

i never used prf - drones so only talking about the cultivator ones. The fertilizing is under farming -> sow fertilize and reclaim ( kina annoying sometimes as terrain reclaims take tons of times if you only put your dedicated farmers on it who doesnt know how to hold a spate with his building 0 ability)

If none of the drones will do fertilizing, we should be able to make them do it by patching in the appropriate worktype.

It depends exactly which drones. The Cultivator drones - no. They only sow and harvest plants. If you're using Drone Stations from PRF - Drones, then yes. What I'm not sure of is which type is needed for that particular task. I can't remember if fertilizing is considered a farming job or a construction job, like terraforming is.

Construction tasks are done by Construction Drone Stations, and Farming is done by Growing Drone Stations.

do the drones also auto appply the fertilizer on fields with the hardcore mode enabled?

updated for PRF compatibility.