## Construction

The Construction skill lets players saw logs into planks and assemble planks into furniture at a
workbench. Recipes live on the output item's YAML via the `craft:` block — just like every other
crafting skill (see `recipes.md`).

### Required Objects

**Workbench** (`data/objects/workbench.yaml`) — the station where construction happens:

```yaml
name: workbench
color: "AC"
description:
  - text: "A sturdy wooden workbench covered in sawdust, nails, and blueprints."
inroom_description: "A workbench stands against the wall, cluttered with tools and wood shavings."
```

**Estate Directory** (`data/objects/estate_directory.yaml`) — terminal for homeowners:

```yaml
name: Estate Directory
color: "27"
description:
  - text: "A holographic terminal displaying property records."
inroom_description: "An estate directory terminal stands in the center of the neighborhood."
```

The directory is handled by Go code: when a player looks at or uses it, it scans character
YAML files for the `owns_house_local_neighborhood` player flag and lets homeowners teleport
into their house.

### Tools

**Saw** (`data/items/tools/saw.yaml`) — required for log-to-plank recipes:

```yaml
name: saw
color: "98"
description: "A sharp-toothed saw for cutting planks from logs at a workbench."
tool:
  type: saw
value: 30
```

### Planks (4 tiers)

Recipes on each plank item convert logs into planks at the workbench with a saw:

```yaml
# data/items/materials/planks.yaml
name: planks
color: "89"
value: 20
craft:
  - type: construction
    level: 1
    xp: 5
    ticks_per_cycle: 20
    station: [workbench]
    tool: saw
    ingredients:
      - items: [logs]
        quantity: 1
    success_message: "You saw the logs into %n."
```

```yaml
# data/items/materials/oak_planks.yaml
name: oak planks
color: "66"
value: 40
craft:
  - type: construction
    level: 15
    xp: 10
    ticks_per_cycle: 20
    station: [workbench]
    tool: saw
    ingredients:
      - items: [oak_logs]
        quantity: 1
    success_message: "You saw the oak logs into %n."
```

| Item | Level | Logs → | Value |
|------|-------|--------|-------|
| `planks` | 1 | `logs` | 20 |
| `oak_planks` | 15 | `oak_logs` | 40 |
| `teak_planks` | 35 | `teak_logs` | 80 |
| `mahogany_planks` | 50 | `mahogany_logs` | 120 |

### Furniture

Furniture recipes consume planks at the workbench (no saw needed):

```yaml
# data/items/misc/wooden_chair.yaml
name: wooden chair
color: "82"
value: 35
craft:
  - type: construction
    level: 8
    xp: 30
    ticks_per_cycle: 6
    station: [workbench]
    ingredients:
      - items: [planks]
        quantity: 2
```

```yaml
# data/items/misc/wooden_table.yaml
name: wooden table
color: "82"
value: 50
craft:
  - type: construction
    level: 6
    xp: 25
    ticks_per_cycle: 6
    station: [workbench]
    ingredients:
      - items: [planks]
        quantity: 3
```

```yaml
# data/items/misc/oak_table.yaml
name: oak table
color: "5E"
value: 100
craft:
  - type: construction
    level: 20
    xp: 50
    ticks_per_cycle: 6
    station: [workbench]
    ingredients:
      - items: [oak_planks]
        quantity: 3
```

| Item | Level | Planks | XP |
|------|-------|--------|----|
| `wooden_shelf` | 4 | 2 planks | 15 |
| `wooden_table` | 6 | 3 planks | 25 |
| `wooden_chair` | 8 | 2 planks | 30 |
| `oak_shelf` | 18 | 2 oak planks | 35 |
| `oak_table` | 20 | 3 oak planks | 50 |
| `teak_table` | 38 | 3 teak planks | 75 |
| `mahogany_table` | 52 | 3 mahogany planks | 100 |

### NPCs

**Estate Broker** — sells a house plot for 10 credits. Talk node action uses `credits` (negative = charge) and `set_player_flags`:

```yaml
name: estate broker
protected: true
unique: true
talk:
    nodes:
        start:
            messages:
                - "Welcome! I'm selling housing plots for 10 credits. Interested?"
            options:
                - text: "Yes, I'd like to buy a house."
                  condition:
                    player_flag: owns_house_local_neighborhood
                    not: true
                  action:
                    credits: -10
                    set_player_flags:
                      owns_house_local_neighborhood: local_neighborhood
                  goto: purchased
                - text: "No thanks."
                  goto: goodbye
        purchased:
            messages:
                - "The plot is yours. Use the Estate Directory to enter."
            options:
                - text: "Thanks!"
                  goto: start
        goodbye:
            messages:
                - "Come back anytime!"
```

**Sawmill Operator** — converts logs to planks for credits via dialog. Fees per log: regular (5cr), oak (10cr), teak (20cr), mahogany (40cr). Use option conditions with `any_of` + `has_item` to gate the "process my logs" choice.

### Player Houses

Player houses are real YAML rooms in `data/rooms/player_housing/`. Each area has entrance + workshop rooms.
House room files follow the same format as world rooms:

```yaml
name: "Player House: Entrance Hall"
description: "A modest but welcoming entrance hall."
exits:
  south: 170
  north: 201
objects:
  - id: workbench
```

Ownership is tracked via player flags. The Estate Directory scans character files for flags
like `owns_house_local_neighborhood` to show registered homeowners.