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-tool-fetchernpx skills add zjunlp/SkillNet --skill scienceworld-tool-fetchergit 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-tool-fetcher)<a href="https://agentmods.dev/skills/zjunlp/skillnet/scienceworld-tool-fetcher"><img src="https://agentmods.dev/badge/skills/zjunlp/skillnet/scienceworld-tool-fetcher.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 | $0.00068 | $0.00549 |
| Opus 5 | $0.00034 | $0.00275 |
| Sonnet 5 | $0.00014 | $0.00110 |
| Haiku 4.5 | $0.00007 | $0.00055 |
Grade A, and why
scienceworld-tool-fetcher 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
Instructions
Primary Goal: Locate a specified tool and move it to your inventory.
1. Identify the Target Tool
- The required tool will be specified in the user's task or request (e.g., "thermometer", "stopwatch", "lighter").
- Confirm the exact name of the tool object.
2. Locate the Tool via Exploration
- If you are not in the correct room, use
teleport to [ROOM_NAME]to go to the most likely location (e.g.,kitchen,workshop). - Use
look aroundto survey the current room. - Scan the observation for the target tool name. It may be:
- Listed directly in the room description (e.g., "a thermometer").
- Inside an open container (e.g., "a fridge. In the fridge is: chocolate, a wood cup...").
- If the tool is not immediately visible, examine likely containers using
look at [CONTAINER](e.g.,look at counter,look at cupboard).
3. Execute the Pick-up
- Once the tool is located, execute the action:
pick up [TOOL_NAME]. - Example:
pick up thermometer. - Verify the action was successful by checking the observation for confirmation (e.g., "You move the thermometer to the inventory.").
4. Post-Action Verification (Optional)
- If required by the broader task, you may perform a secondary action to signal readiness, such as
focus on [TOOL_NAME] in inventory.
Key Constraints & Notes
- Containers are Open: All containers are pre-opened. Do not use
openorcloseactions. - Direct Action: Proceed directly to
pick up. Do not attempt to move the tool to an intermediate location first. - Tool Not Found: If the tool is not in the initial room, systematically
teleportto other relevant rooms and repeat thelook aroundsearch pattern. - Single Tool: This skill fetches one specified tool. For multiple tools, trigger the skill sequentially.
Output: The target tool will be in your inventory, ready for use in subsequent task steps.
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.
- 2d ago First seen · 36 lines · 68 tokens per session scan A a6847144d168
scienceworld-tool-fetcher is a skill published in the GitHub repository zjunlp/SkillNet (1,254 stars, last pushed 2d ago), licensed MIT. It adds 68 tokens to every session and 549 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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