1. The mod's detection time is 1 second. Any item placed within 1 second after crafting will disappear directly. It is recommended to discard the item on the ground instead.
2. The finally built rocket has no recipe selection interface. I have to dismantle the rocket silo and place it again to select other rocket part recipes.

hi
Don't you think this is a bug?

After the construction of each building phase is completed, your code waits until items at the output port are taken out before triggering phase switching. However, it fails to account for items in the input port, which will cause all items stored in the input port to be lost.

Additionally, to enable automated construction, it is recommended to add signal connection support.
if data.raw["assembling-machine"]["rsc-silo-stage1"] then
data.raw["assembling-machine"]["rsc-silo-stage1"].circuit_wire_max_distance = furnace_circuit_wire_max_distance
data.raw["assembling-machine"]["rsc-silo-stage1"].circuit_connector = circuit_connector_definitions["rocket-silo"]
data.raw["assembling-machine"]["rsc-silo-stage1"].allowed_effects = { "consumption", "speed", "pollution" }
data.raw["assembling-machine"]["rsc-silo-stage2"].circuit_wire_max_distance = furnace_circuit_wire_max_distance
data.raw["assembling-machine"]["rsc-silo-stage2"].circuit_connector = circuit_connector_definitions["rocket-silo"]
data.raw["assembling-machine"]["rsc-silo-stage2"].allowed_effects = { "consumption", "speed", "pollution" }
data.raw["assembling-machine"]["rsc-silo-stage3"].circuit_wire_max_distance = furnace_circuit_wire_max_distance
data.raw["assembling-machine"]["rsc-silo-stage3"].circuit_connector = circuit_connector_definitions["rocket-silo"]
data.raw["assembling-machine"]["rsc-silo-stage3"].allowed_effects = { "consumption", "speed", "pollution" }
data.raw["assembling-machine"]["rsc-silo-stage4"].circuit_wire_max_distance = furnace_circuit_wire_max_distance
data.raw["assembling-machine"]["rsc-silo-stage4"].circuit_connector = circuit_connector_definitions["rocket-silo"]
data.raw["assembling-machine"]["rsc-silo-stage4"].allowed_effects = { "consumption", "speed", "pollution" }
data.raw["assembling-machine"]["rsc-silo-stage5"].circuit_wire_max_distance = furnace_circuit_wire_max_distance
data.raw["assembling-machine"]["rsc-silo-stage5"].circuit_connector = circuit_connector_definitions["rocket-silo"]
data.raw["assembling-machine"]["rsc-silo-stage5"].allowed_effects = { "consumption", "speed", "pollution" }
data.raw["assembling-machine"]["rsc-silo-stage6"].circuit_wire_max_distance = furnace_circuit_wire_max_distance
data.raw["assembling-machine"]["rsc-silo-stage6"].circuit_connector = circuit_connector_definitions["rocket-silo"]
data.raw["assembling-machine"]["rsc-silo-stage6"].allowed_effects = { "consumption", "speed", "pollution" }
end

new version released. thanks

When switching phases, the machine's configurations are not preserved. For example, signals used for reading recipes and other related settings have to be manually reconfigured every time.

https://drive.google.com/drive/folders/1uAvNtyvdiKIYZLHnDhkdb_7bwCu_DE6G?usp=drive_link
This is the 2.0 version I modified several months ago. It retains the machine configurations and wiring connections during phase switching, and I hope it will be helpful to you.