fac-place

name	fac-place
description	Place one entity from your Factorio inventory at a position (stone-furnace, iron-chest, burner-inserter, transport-belt, ...). You must be within ~10 tiles; the item must be in your inventory. For belt/pipe/pole RUNS use fac-connect instead.
args	{"prototype":"required string — entity prototype name, e.g. \"stone-furnace\"","x":"required number — target x","y":"required number — target y","direction":"optional string — north | east | south | west (default north)"}

fac-place

Place a single entity via the game bridge.

Behavior

• Consumes one prototype from your inventory (fac-inventory to check).
• Enforces character reach (~10 tiles): walk close first (fac-walk).
• Failure carries a deviation report: world_changed (something appeared there since you observed — coordinate, maybe say something), stale_model (you never observed there recently — fac-observe and retry), infeasible (collision/invalid with current knowledge).
• Inserters: direction is where the inserter FACES; they pick up from the tile behind and drop to the tile in front.
• Catching a machine's output: drills and inserters eject at their outputs to (x, y) tile shown by fac-observe — place the receiving belt/chest EXACTLY there. Entities are wider than one tile (a burner-mining-drill is 2x2); tiles adjacent to its center are usually inside it and will fail with "blocked by: ".
• Placement grid: 1x1 entities (belt, inserter) sit at coordinates ending in .5; 2x2 entities (drill, stone-furnace, chest is 1x1) at whole numbers. Pass observed coordinates through EXACTLY — never round. An off-grid position is rejected with the valid candidates.