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*"Objects don't wait to be used — they announce what they can do."*
What Is It?
Advertisement is The Sims-style object interaction: every object in a room broadcasts its available actions, scored by relevance to the current context.
Instead of the user memorizing commands, objects advertise what's possible:
You approach the workbench.
Available actions (sorted by relevance):
⭐ CRAFT tool (you have materials)
• EXAMINE blueprints
• ORGANIZE parts
• MORE options...The Sims Connection
In The Sims, objects have "advertisements" — each interaction scores based on:
- The Sim's current needs (hunger, fun, social)
- Object properties (a fridge scores high for hunger)
- Context (can't use stove if broken)
This extensible object architecture was key to The Sims' massive success:
- User-created objects — anyone could make new furniture, appliances, characters
- Expansion packs — just drop in new objects with their advertisements
- No code changes — objects self-describe their behaviors
- Infinite variety — the community created millions of objects
The same YAML file that defines what an object *is* also defines what it *can do*. Plug-in architecture for free.
MOOLLM applies this to any object:
# workbench.yml
type: object
advertisements:
- action: CRAFT
score_if: "has_materials AND has_skill"
satisfies: [productivity, creativity]
- action: EXAMINE
score_if: "always"
satisfies: [curiosity]
- action: MORE
score_if: "always"
satisfies: [exploration]How It Works
1. Objects Broadcast
Every object in the room has an advertisements list:
advertisements:
- action: USE
description: "Activate this tool"
preconditions: [in_inventory, charged]
score: 80
- action: EXAMINE
description: "Look closely"
preconditions: [] # always available
score: 502. Context Scores
Scores adjust based on:
- Character needs — hungry character scores FOOD higher
- Current goals — research goal scores EXAMINE higher
- Environment — dark room scores LIGHT higher
3. Pie Menu Appears
Top actions surface in the PIE-MENU:
[CRAFT]
⭐
[ORGANIZE] • [EXAMINE]
•
[MORE]Center = highest score = default action.
Autonomous Selection
For autonomous agents, advertisements enable self-direction:
Agent evaluates all objects in room:
workbench: CRAFT (85), EXAMINE (50)
bookshelf: READ (70), ORGANIZE (30)
door: EXIT (40)
Agent selects: CRAFT at workbench (score 85)No hardcoded behavior. Objects define possibilities. Agent selects based on goals.
Example: Smart Room
# research-lab/ROOM.yml
objects:
- microscope:
advertisements:
- action: ANALYZE_SAMPLE
score_if: "has_sample"
score: 90
- action: CALIBRATE
score_if: "accuracy < 0.9"
score: 60
- notebook:
advertisements:
- action: WRITE_NOTES
score_if: "has_observations"
score: 75
- action: REVIEW
score: 40
- coffee_maker:
advertisements:
- action: BREW
score_if: "fatigue > 0.3"
score: 65
- action: CLEAN
score_if: "uses > 5"
score: 30Agent enters, sees:
Top actions:
1. ANALYZE_SAMPLE at microscope (90) — you have a sample!
2. WRITE_NOTES at notebook (75) — observations pending
3. BREW at coffee_maker (65) — you're a bit tiredSimAntics Heritage
This is SimAntics — The Sims' behavioral engine:
| SimAntics | MOOLLM |
|---|---|
| Object advertisement | advertisements: list in YAML |
| Motive scores | Context-based scoring |
| Autonomous selection | Agent picks highest-scored action |
| Pie menu | PIE-MENU for user interaction |
Don Hopkins worked on SimAntics. This is that tradition, for LLM agents.
HyperCard-Style Event Bubbling
When you click an advertised action, it triggers a symbolic event that bubbles up:
Click CRAFT on workbench
Event path:
1. workbench (object) → handles CRAFT? no, pass up
2. workshop/ (room) → handles CRAFT? no, pass up
3. building/ (parent) → handles CRAFT? no, pass up
4. world/ (root) → handles CRAFT? no, check inheritance
5. workbench-prototype → handles CRAFT? YES → executeJust like HyperCard: events bubble from button → card → background → stack.
Containment Tree (Spatial)
Events bubble up the room hierarchy:
object in room in parent-room in world
↑ ↑ ↑ ↑
event bubbles upInheritance Graph (Prototype)
If no handler in containment tree, check the prototype chain:
workbench
↓ inherits from
furniture-prototype
↓ inherits from
object-prototype → has default CRAFT handler!Combined Path
# Event resolution order:
1. The object itself
2. Parent room
3. Grandparent room
4. ... up to world root
5. Object's prototype
6. Prototype's prototype
7. ... up to root prototypeFirst handler that responds wins. Unhandled events can:
- Log a warning
- Trigger POSTEL (charitable interpretation)
- Invoke a default handler
Example: Custom Behavior
# workshop/ROOM.yml
handles:
CRAFT: |
# Room-level craft handler
Check if character has required skill.
Check if materials available in room.
If conditions met, delegate to object.
Otherwise, suggest where to get materials.The room intercepts CRAFT before it reaches the object, adding room-specific logic.
Dovetails With
- Room — Where objects live and advertise
- PIE-MENU — How advertisements surface to users
- SNAP-CURSOR — Context-aware object interaction
- Coherence Engine — Evaluates and selects actions
- Trading Card — Cards can advertise too
- Rubric — Scoring criteria for advertisement evaluation
- Scoring — How scores are calculated and valued
Protocol Symbols
ADVERTISEMENT — Objects announce available actions
AUTONOMOUS-SELECTION — Agent picks based on scores
SIMANTICS — The Sims behavioral model
PIE-MENU — Radial display of options
FLY-UNDER-RADAR — Normalize through defaults
PROCEDURAL-RHETORIC — Rules carry ideologySee: PROTOCOLS.yml
The Deep Insight
From SIMANTICS:
*"The Sims' AI isn't centralized — it's distributed throughout objects."* *"A refrigerator knows it offers food. A bed knows it offers sleep."* *"The Sim chooses from what's advertised nearby."*
This IS MOOLLM's architecture. Objects self-describe. The coherence engine orchestrates. Intelligence is distributed throughout the world.
The advertisements ARE the AI.