alfworld-task-verifier

1# Skill: Task Verifier for ALFWorld
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3## When to Use
4Trigger this skill when:
51. The agent has just completed a key sub-action (e.g., `put {obj} in/on {recep}`)
62. The agent needs to determine whether the overall task goal is satisfied
73. The agent must decide whether to continue searching or conclude the task
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9## Core Workflow
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11### 1. Parse the Task Goal
12Extract from the original task description:
13- **Target object(s)**: What needs to be found/placed (including quantity)
14- **Target receptacle**: Where objects must end up
15- **Required transformations**: Any cleaning, heating, or cooling steps
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17### 2. Analyze the Observation
18Evaluate the most recent `Observation:` text from the environment:
19- Look for evidence that required objects are present in the target receptacle
20- Count how many target objects have been successfully placed
21- Note: Other items in the receptacle do not invalidate success
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23### 3. Make a Verification Decision
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25| Condition | Decision | Output |
26|-----------|----------|--------|
27| All required objects confirmed in target receptacle | Complete | `Verification: Task complete. No further action needed.` |
28| Some but not all objects placed | Incomplete | `Verification: Task incomplete. Continue searching for {missing object(s)}.` |
29| Observation says "Nothing happened" | Ineffective | `Verification: Last action was ineffective. Re-assess and try a different approach.` |
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