SkillNet is infrastructure for finding, creating, evaluating, combining, and coordinating reusable capabilities for AI agents. Agent developers use it as a searchable and installable library of skills and as a system for selecting skills for particular tasks. The catalogue contains skills that can be discovered, installed, or used with SkillNet.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/zjunlp/skillnet/alfworld-tool-usernpx skills add zjunlp/SkillNet --skill alfworld-tool-usergit clone --depth 1 https://github.com/zjunlp/SkillNetWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/zjunlp/skillnet/alfworld-tool-user)<a href="https://agentmods.dev/skills/zjunlp/skillnet/alfworld-tool-user"><img src="https://agentmods.dev/badge/skills/zjunlp/skillnet/alfworld-tool-user.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00075 | $0.00755 |
| Opus 5 | $0.00037 | $0.00378 |
| Sonnet 5 | $0.00015 | $0.00151 |
| Haiku 4.5 | $0.00007 | $0.00076 |
Grade A, and why
alfworld-tool-user scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill: Tool User for ALFWorld
When to Use
Trigger this skill when:
- A task requires applying a tool to an object (e.g., cleaning a knife with a sinkbasin, heating food with a microwave)
- Both the tool and target object are in the agent's possession or within reach
- The agent knows which interaction verb to use for the task context
Core Workflow
1. Identify Requirements
- Parse the task to determine:
- Target object: The item to be acted upon (e.g.,
knife 1,potato 2) - Required tool: The appliance or instrument needed (e.g.,
sinkbasin 1,microwave 1) - Interaction type: The action verb (
clean,heat,cool,use,examine)
- Target object: The item to be acted upon (e.g.,
2. Locate and Acquire
- Target object: If not in inventory, navigate to its location and
take {object} from {receptacle} - Tool: Navigate to the tool's location (tools are typically stationary appliances)
3. Execute Interaction
Apply the tool to the object using the correct action syntax:
| Interaction | Action Command | Example |
|---|---|---|
| Clean | clean {obj} with {tool} |
clean knife 1 with sinkbasin 1 |
| Heat | heat {obj} with {tool} |
heat potato 2 with microwave 1 |
| Cool | cool {obj} with {tool} |
cool apple 1 with fridge 1 |
| Examine | examine {obj} |
examine book 3 |
| Use | use {tool} |
use desklamp 1 |
4. Verify Outcome
- Check the environment observation after the action
- A successful interaction changes the object state (e.g.,
knife 1becomes clean) - If the observation says "Nothing happened," the action was invalid
Error Handling
- "Nothing happened": Reassess whether the agent is at the correct location and holding the correct object. Verify the action verb matches the task context.
- Wrong tool: If the tool does not match the interaction type, search for the correct appliance (e.g., use
sinkbasinfor cleaning, notbathtub). - Object not held: The agent must be holding the target object before most interactions. Use
takefirst.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 62 lines · 75 tokens per session scan A b3fbd0329f06
alfworld-tool-user is a skill published in the GitHub repository zjunlp/SkillNet (1,253 stars, last pushed 15d ago), licensed MIT. It adds 75 tokens to every session and 755 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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