zjunlp/alfworld-receptacle-navigator

Skill: Receptacle Navigator

Purpose

Navigate to a specified receptacle (e.g., fridge 1, garbagecan 1, diningtable 1) in an ALFWorld household environment. This is a foundational skill for positioning the agent to perform subsequent object interactions.

When to Use

Trigger this skill when the agent's plan requires:

1. Accessing a location to interact with an object there (e.g., "go to fridge to cool an item").
2. Interacting with the receptacle itself (e.g., "go to garbagecan to dispose of an item").

Core Logic

1. Input Parsing: Extract the target receptacle name (e.g., fridge 1) from the current task context or observation.
2. Action Execution: Output the ALFWorld action: go to {target_receptacle}.
3. Success Verification: Confirm the action was successful by checking the observation for evidence of arrival (e.g., "You are at the {receptacle}" or the receptacle is now in the observable list).

Instructions

1. Identify the target receptacle from the goal or current observation.
2. Execute the go to action.
3. If the environment responds with "Nothing happened", the action was invalid. Consult the references/common_receptacles.md list and the latest observation to formulate a new go to target.
4. Upon successful navigation, proceed with the next skill in the plan (e.g., alfworld-object-interactor).

Example

Input: target_receptacle: fridge 1

Sequence:

1. go to fridge 1 → Observation: "You are at fridge 1. On the fridge 1, you see nothing."

Output: Agent has arrived at fridge 1 and can now interact with it (open, take items, cool objects, etc.).

Error Handling

• Invalid Target: If "Nothing happened" is observed, the receptacle may be unreachable or incorrectly named. Re-analyze the scene description to find a valid path or alternative receptacle.
• Already at Location: If the observation indicates you are already at the target, skip the go to action and proceed.