Brief Introduction: 
A simple mod that can use Home Plate as a medium to link selected settlements with the vanilla resource-sharing system. (for now 29 vanilla, all DLC, and 4 CC settlements)
Requirements: 
The latest version of Fallout 4
F4SE (New hard requirement)
MCM (New hard requirement)
Automatron (Optional)
Far Harbor  (Optional)
Nuka World  (Optional)
Vault-Tec Workshop  (Optional)
Creation Club Contents (Optional)
Faction Housing Overhaul - All In One (Optional)
The Goodneighbor Condo Player Home

Features: 
Like the vanilla supplyline function, this mod automatically shares specific resources among selected workshops in settlements. I just center Home Plate and register the supplyline keyword from it to all the other settlements. 
Theoretically, all registered linked settlements have vanilla cloudy sharing. 
(New in 1.0) Selected settlements linkings through MCM control. 
(New in 1.0) DLC and CC contents are supported through script checking. Except for "settlements" or "homes" without a properly functioning workshop bench like Fizztop Grille and some locations in FHO, no additional plugins are needed. 
        (New in 1.01) Settlement locations of Creation Club lack functioning keywords as Home Plate does. Optional plugins have been added in the installer. 
(New in 1.03) Add support for Creation Club home Nu Cafe Ola and only supplyline support, beyond building area, for The Goodneighbor Condo Player Home, without damaging its original sorting system.

Supported CC settlements: ccZSEFO4001: Charlestown Condo; ccTOSFO4001: Noir Penthouse; ccZSEFO4002: Shroud Manor; ccTOSFO4002: Neon Flats, cceejfo4002: Nu Cafe Ola. 

If new contents/mods are request, please tell me new settlement's location FormID and plugin name for an update. 


What the mod does NOT provide:
1. Completely register Home plate or some 3rd-party mods as settlements.
This mod only adds the supplylines sharing and they will not appear on the Pipboy, nor modifying building area. 
2. Completely share all the stuff in the workshop container.
Someone tell me that simply linking all the workshops refID to just one container will exceed the limit and crash the game. Acutually linking too many settlement with this mod will somehow stick the game when the protagonist first approach a workbench.
3. Visable supply lines on Pipboy. 
        The actual supplyline keyward function is independent of the visable lines, but the resources will be shared when settlements are linked.
4. Immersion.
Definitely it's a cheat mod.

Upgrade: 
1) Wrong fomod file corrected. Sorry for the trouble.
2) from 1.0 to 1.01: Compatilibity esl plugins for Creation Club contents are still needed. Just re-install and safe to update. 
3) from 0.61 to 1.0: just remove old version mods and use the new one, but a clean save is always recommended. Player can always clean all linked kewords in MCM menu though one click, close MCM mene and then re-link selected settlements.
4) from 0.6beta to 0.61: simply override. 
5) From 0.5beta or previous version: need a clean save
6) From 1.01 to new: need a clean save to refresh the new functions in the script and re-link your settlements. Safe to remove and reinstall.

Compatibility: 
Should be compatible with most mods except those having the function of canceling supplyline keywords. I have not used a provisioner ever before and I do not guarantee that situation. 
Tested on both a new game and my lv78 character; whether built-already or newly cleared settlements, or Home Plate.
Vanilla part of this mod only modifies the DiamondCityPlayerHouseLocation "Home Plate" [LCTN:00003967] and adds a quest. Creation club and 3rd-party mods houses need compatible patches included in the installer. NOTE: Some mods may override creation club content cells like this and disable the vanilla supplyline system toward these houses. 
(New 1.0) In Eli's FHO mod, Prydwen private room is already linked to Boston airport and General's cornor to the Castle respectively. No edits needed for these two rooms any more.
(New in 1.03) Add support for Creation Club home Nu Cafe Ola and The Goodneighbor Condo Player Home, and both patches are included. 

Issues & bugs:
After uninstalling the mod, share storage of HomePlate disappears but other vanilla settlements still have linked resource. 
Player can clean all links in MCM before uninstallation. 
Unlinked settlements will not cost your treasure food items, except potential minor incompatibility using Workshop Framework's specific function.


Credit: 
Creation Kit  XEdit
Bethesda for Fallout 4
Shillianth.com for the picture

[Optional files]Elianora for Faction Housing Overhaul - All In One