Skill: Object Locator for ALFWorld

When to Use

Trigger this skill when:

1. Your goal requires a specific object (e.g., knife, cellphone, apple)
2. The object is not in your inventory
3. The current observation does not explicitly state the object's location

Core Workflow

1. Parse the Environment

Extract all visible receptacles from the observation text. Typical ALFWorld receptacles include:

• Surfaces: countertop, desk, dresser, bed, shelf, sidetable, coffeetable, diningtable
• Containers: drawer, cabinet, safe, fridge, microwave, garbagecan
• Appliances: sinkbasin, bathtub, stoveburner, toaster

2. Rank by Likelihood

Use common-sense reasoning to prioritize where the target object is most likely found:

Object Type	High-Probability Receptacles
Kitchen items (knife, spatula, pan)	countertop, drawer, diningtable, stoveburner
Food (apple, potato, tomato, bread)	fridge, countertop, diningtable, microwave
Bathroom items (sponge, cloth, soap)	sinkbasin, bathtub, cart, shelf
Electronics (cellphone, laptop, remote)	desk, sidetable, dresser, bed, coffeetable
Stationery (pen, pencil, book)	desk, shelf, drawer, sidetable
Lighting (candle, desklamp)	sidetable, shelf, desk, dresser

3. Navigate and Search

For each candidate receptacle (in priority order):

1. go to {receptacle}
2. Read the observation, does it mention the target object?
   • YES: take {object} from {receptacle}, object found
   • NO: If the receptacle is closed, open {receptacle} and re-check
   • Still NO: Move to the next candidate receptacle

4. Track Searched Locations

Maintain a list of already-searched receptacles to avoid revisiting them. If all high-probability locations are exhausted, expand the search to remaining receptacles.

Example