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/scienceworld-object-retrievernpx skills add zjunlp/SkillNet --skill scienceworld-object-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-object-retriever)<a href="https://agentmods.dev/skills/zjunlp/skillnet/scienceworld-object-retriever"><img src="https://agentmods.dev/badge/skills/zjunlp/skillnet/scienceworld-object-retriever.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 5.1 | $0.00070 | $0.00396 |
| Opus 5 | $0.00035 | $0.00198 |
| Sonnet 5 | $0.00014 | $0.00079 |
| Haiku 4.5 | $0.00007 | $0.00040 |
Grade A, and why
scienceworld-object-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 2d 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: Object Retriever
Purpose
Acquire a target object from the environment and place it into your inventory for further use.
When to Use
- You need an object for testing, measuring, or transporting.
- The object is visible in the room but not yet in your inventory.
- A downstream skill (e.g., tool-user, object-placer) requires the object in inventory.
Core Workflow
- Navigate:
teleport to LOCif needed to reach the room containing the object. - Survey:
look aroundto confirm the object is present and identify its exact name. - Acquire:
pick up OBJusing the exact name from the environment description. - Verify: Check the observation feedback confirms "You move the [object] to the inventory."
Example
Task: Retrieve a metal fork from the kitchen for conductivity testing.
teleport to kitchenlook around— see "a metal fork" on the counterpick up metal fork- Observation: "You move the metal fork to the inventory."
Important Notes
- Ensure you are in the correct room before attempting
pick up. Useteleport to LOCif necessary. - If
look arounddoes not reveal the object, useexamineon containers or furniture (e.g.,examine table). - If a container is closed, use
open OBJfirst. - After acquisition, the object is ready for the next skill in the task sequence.
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.
- 2d ago First seen · 34 lines · 70 tokens per session scan A ba38171ce15a
scienceworld-object-retriever is a skill published in the GitHub repository zjunlp/SkillNet (1,253 stars, last pushed yesterday), licensed MIT. It adds 70 tokens to every session and 396 once invoked, about $0.0003 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 2026-09-03.
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