# Fac Place

> 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.

- Skill: `bdambrosio/fac-place` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add bdambrosio/fac-place`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bdambrosio/fac-place/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: bdambrosio (https://skillmd.com/u/bdambrosio)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/bdambrosio/fac-place

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# 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: <the entity itself>".
- 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.

```json
{"thought": "furnace goes here", "tool": "fac-place", "args": {"prototype": "stone-furnace", "x": 48, "y": 60, "direction": "east"}}
```