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alfworld-object-state-inspector

Inspects a receptacle's contents by navigating to it and reading the observation. Use when you need to check what is on or inside a receptacle (e.g., "what's on the shelf", "is the holder empty", "check the table for items"). Executes `go to {receptacle}`, parses the observation listing items present, and decides whether to take an item, search elsewhere, or proceed.

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zjunlp/SkillNet
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March 16, 2026 at 16:23
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name
alfworld-object-state-inspector
description
Inspects a receptacle's contents by navigating to it and reading the observation. Use when you need to check what is on or inside a receptacle (e.g., "what's on the shelf", "is the holder empty", "check the table for items"). Executes `go to {receptacle}`, parses the observation listing items present, and decides whether to take an item, search elsewhere, or proceed.
# Instructions Inspect the state or contents of a target receptacle by navigating to it and parsing the environment's observation feedback. ## Workflow 1. **Navigate:** Execute `go to {target_receptacle}` 2. **Read observation:** The environment automatically reports what is on/in the receptacle -- no additional inspection action is needed 3. **Parse contents:** Look for patterns: - `"On the {receptacle}, you see nothing."` -- receptacle is empty - `"On the {receptacle}, you see a {item1}, and a {item2}."` -- items are present 4. **Decide next action** based on the observation: - Empty: search elsewhere for the needed item - Item found: `take {item} from {receptacle}` - Wrong items: move on to the next receptacle ## Error Recovery - "Nothing happened": the `go to` target name is invalid -- verify the receptacle name from your environment scan - This skill uses only `go to` for navigation; it does not use `open`, `close`, or `toggle` ## Example **Scenario 1:** Check if a toiletpaperhanger has toilet paper. ``` Action: go to toiletpaperhanger 1 Observation: On the toiletpaperhanger 1, you see nothing. ``` **Decision:** Holder is empty. Find a toiletpaper roll elsewhere and bring it here. **Scenario 2:** Check a toilet for available items. ``` Action: go to toilet 1 Observation: On the toilet 1, you see a soapbottle 1, and a toiletpaper 1. ``` **Decision:** toiletpaper 1 is available. Execute `take toiletpaper 1 from toilet 1`.
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