TL;DR
Let rocket silos have an item filter that applies to automatic requests, so that silos can be constrained in which items they launch.What?
* Add UI to the rocket silo so that the player can restrict which items a specific silo is allowed to launch when fulfilling automatic logistic requests.* Let this item filter be read from the circuit network, so that silos can be managed in bulk and exports can be restricted by circuit policy.
* Have a mode slider so the filter can operate as either an allow-list or deny-list, similar to inserters' filters.
Why?
This makes it easier to allocate separate rocket silo capacity between bulk exports (science packs, planet-specific resources) and small-run exports (e.g. the outputs of a mall). Specifically I want to be able to control which silos are allowed to export planet-specific resources such as tungsten or holmium plates, and restrict exports during times of scarcity.See viewtopic.php?t=126482 for an earlier suggestion that tried to solve the same problem via a different mechanism (silo names).
edit: I pointed an LLM at the 2.1.20 binary and it was able to produce a shim .so that adds Lua hooks for rocket silo payload dispatch + write a mod against those hooks to add new UI. The body of the shim is ~300 LoC in payload_hook.cpp and filters.cpp.
Even if the feature isn't added to the game as-is, it'd be nice to get some extension points added to the modding API so a pure-Lua mod could implement it.
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