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 skills add zjunlp/SkillNet --skill scienceworld-container-item-retrievergit 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/scienceworld-container-item-retriever)<a href="https://agentmods.dev/skills/zjunlp/skillnet/scienceworld-container-item-retriever"><img src="https://agentmods.dev/badge/skills/zjunlp/skillnet/scienceworld-container-item-retriever/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/zjunlp/skillnet/scienceworld-container-item-retriever"><img src="https://agentmods.dev/badge/skills/zjunlp/skillnet/scienceworld-container-item-retriever.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 5.1 | $0.00092 | $0.00502 |
| Opus 5 | $0.00046 | $0.00251 |
| Sonnet 5 | $0.00018 | $0.00100 |
| Haiku 4.5 | $0.00009 | $0.00050 |
Grade A, and why
scienceworld-container-item-retriever 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 10d 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.
What it actually says
Skill: Retrieve Item from Container
Purpose
Transfer a specified item from an open, accessible container into the agent's inventory using the pick up action.
Trigger Conditions
Use this skill when all of the following are true:
- The agent has identified a specific item needed for a task.
- The item is located inside a container (e.g., jar, box, hive, closet).
- The container is already open and accessible (no
openaction required). - The agent's immediate goal is to possess the item for later use.
Core Action
Execute the pick up <ITEM> action, where <ITEM> is the exact name of the target object as observed in the environment.
Execution Workflow
- Verify Context: Ensure the target item is present in the current room's observation and is inside an open container.
- Execute Transfer: Perform the
pick up <ITEM>action. - Confirm Success: The expected observation is:
"You move the <ITEM> to the inventory."If a different result occurs, consult the troubleshooting guide.
Important Notes
- Pre-condition: This skill assumes the container is already open. If the container is closed, you must use the
openaction first. - Ambiguity: If multiple identical items exist (e.g., "avocado seed, avocado seed, avocado seed"), the
pick upaction will typically retrieve one. The skill does not handle selecting a specific instance. - Post-condition: After successful execution, the item is in the agent's inventory and can be used in subsequent steps.
Example
Task: Retrieve an avocado seed from a jar for planting.
look around— observe: "a jar (containing an avocado seed)"pick up avocado seed- Expected observation: "You move the avocado seed to the inventory."
What ships with it
1 file 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.
- 10d ago First seen · 35 lines · 92 tokens per session scan A 7bdc5419b842
scienceworld-container-item-retriever is a skill published in the GitHub repository zjunlp/SkillNet (1,256 stars, last pushed yesterday), licensed MIT. It adds 92 tokens to every session and 502 once invoked, about $0.0005 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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