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Agent skill

Scienceworld Object Placer

by zjunlp in zjunlp/SkillNet

Moves a specified object from the environment or inventory into a target container based on a classification decision.

MITAuto-check passed

Install Scienceworld Object Placer

skills CLI
$ npx skills add zjunlp/SkillNet --skill scienceworld-object-placer -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install zjunlp/SkillNet scienceworld-object-placer --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/zjunlp/SkillNet.git skills-src && mkdir -p .claude/skills && cp -r skills-src/experiments/src/skills/scienceworld/scienceworld-object-placer .claude/skills/scienceworld-object-placer && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
scienceworld-object-placer
GitHub stars
1.4k
Token cost
~468 tokens
SKILL.md length
221 words
Files
2 (incl. references)
Skills in repo
122
Repo updated
First seen
Licence
MIT

At a glance

Moves a specified object from the environment or inventory into a target container based on a classification decision.

  • Works in 4 steps: Confirm Assessment Result: Know which… → Acquire Object (if needed): pick up OBJ… → Execute Placement: move OBJ to OBJ —… → …
  • A task requires sorting
  • SKILL.md covers Purpose, Core Workflow, Key Actions and Example, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Scienceworld Object Placer is an agent skill from zjunlp/SkillNet. Moves a specified object from the environment or inventory into a target container based on a classification decision. Use this skill when a task requires sorting or storing an object in a specific location after an assessment (e.g., placing a conductive object in the blue box or a non-conductive object in the orange box).

Its SKILL.md is about 470 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/action_primer.md`).

The repository describes itself as: Create, Evaluate, and Connect AI Skills. The licence is MIT.

When your agent uses it

  • A task requires sorting
  • Storing an object in a specific location after an assessment (e.g.
  • Placing a conductive object in the blue box
  • A non-conductive object in the orange box)

Example prompts

  • “Use the scienceworld-object-placer skill to move a specified object from the environment or inventory into a target container based on a…”
  • “/scienceworld-object-placer”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Confirm Assessment Result: Know which container corresponds to which classification (e.g., "blue box" = conductive, "orange box" =…
  2. Acquire Object (if needed): pick up OBJ if the target is not already in inventory.
  3. Execute Placement: move OBJ to OBJ — place the object in the correct container.
  4. Verify Placement: look at to confirm the object is now inside.

What it can do on your machine

Read from SKILL.md and the folder at commit c527136. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Scienceworld Object Placer loads about 468 tokens when it runs, and up to ~854 if it reads all its reference files. Until then it costs about 88 tokens; SKILL.md has 221 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~88
When it runs · the whole SKILL.md, loaded when a task matches
~468
With references · SKILL.md plus every file in references/, read only if the agent opens them
~854

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from zjunlp/SkillNet at commit c527136, republished under its MIT licence (© zjunlp). 221 words, ~468 tokens.

Download SKILL.mdSave it as .claude/skills/scienceworld-object-placer/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
scienceworld-object-placer
description
Moves a specified object from the environment or inventory into a target container based on a classification decision. Use this skill when a task requires sorting or storing an object in a specific location after an assessment (e.g., placing a conductive object in the blue box or a non-conductive object in the orange box).

Skill: Object Placer

Purpose

Move an object into the correct container based on a prior classification or assessment result. This is the final step in conditional sorting workflows.

Core Workflow

  1. Confirm Assessment Result: Know which container corresponds to which classification (e.g., "blue box" = conductive, "orange box" = non-conductive).
  2. Acquire Object (if needed): pick up OBJ if the target is not already in inventory.
  3. Execute Placement: move OBJ to OBJ — place the object in the correct container.
  4. Verify Placement: look at <CONTAINER> to confirm the object is now inside.

Key Actions

ActionPurpose
pick up OBJAcquire object if not in inventory
move OBJ to OBJPlace object into destination container
look at OBJVerify placement succeeded

Example

Task: "Determine if metal pot is electrically conductive. If conductive, place in the blue box. If nonconductive, place in the orange box."

  1. Assessment complete: circuit test confirmed metal pot is conductive.
  2. pick up metal pot (if not already held)
  3. move metal pot to blue box
  4. look at blue box — confirms: "In the blue box is: a metal pot"

Important Notes

  • The classification or assessment must be completed before invoking this skill.
  • Always verify placement with look at — do not assume success.
  • Container names vary per task (blue box, orange box, etc.) — match them to the task instructions.

© zjunlp, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in experiments/src/skills/scienceworld/scienceworld-object-placer of zjunlp/SkillNet.

  • SKILL.md
  • references/action_primer.md

Open the folder on GitHubat commit c527136

Compare with similar skills

Scienceworld Object Placer next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Scienceworld Object Placer compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Scienceworld Object Placer this skillzjunlp/SkillNet1.4k—~468Automated safety check: PassMIT
Object Altthedaviddias/Front-End-Checklist74k—~429Automated safety check: PassMIT
Asset Inventorysickn33/agentic-awesome-skills47k2 repos~3.4kAutomated safety check: PassMIT
Object Storagesickn33/agentic-awesome-skills47k2 repos~2.6kAutomated safety check: PassMIT
Move Code Qualitydavila7/claude-code-templates32k2 repos~3.2kAutomated safety check: PassMIT
Zoho Inventory AutomationComposioHQ/awesome-claude-skills77k3 repos~757Automated safety check: PassNone

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Questions about Scienceworld Object Placer

What does Scienceworld Object Placer do?

Moves a specified object from the environment or inventory into a target container based on a classification decision. Scienceworld Object Placer is an agent skill from zjunlp/SkillNet. Moves a specified object from the environment or inventory into a target container based on a classification decision.

When should I use Scienceworld Object Placer?

Scienceworld Object Placer fits situations like: A task requires sorting; storing an object in a specific location after an assessment (e.g; placing a conductive object in the blue box; A non-conductive object in the orange box).

How do I install Scienceworld Object Placer in Claude Code?

Run `npx skills add zjunlp/SkillNet --skill scienceworld-object-placer -a claude-code`. Or copy the skill folder (experiments/src/skills/scienceworld/scienceworld-object-placer in zjunlp/SkillNet) into .claude/skills/scienceworld-object-placer in your project. Claude Code loads it when a task matches its description.

How do I install Scienceworld Object Placer in Codex?

Run `npx skills add zjunlp/SkillNet --skill scienceworld-object-placer -a codex`. Or copy the skill folder (experiments/src/skills/scienceworld/scienceworld-object-placer in zjunlp/SkillNet) into .agents/skills/scienceworld-object-placer in your project. Codex loads it when a task matches its description.

Can I use Scienceworld Object Placer in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add zjunlp/SkillNet --skill scienceworld-object-placer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/scienceworld-object-placer, .gemini/skills/scienceworld-object-placer, .github/skills/scienceworld-object-placer and .opencode/skills/scienceworld-object-placer in your project.

What does Scienceworld Object Placer need to run?

SKILL.md names no scripts, command-line tools or credentials: Scienceworld Object Placer is instructions for the agent only.

Does Scienceworld Object Placer access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Scienceworld Object Placer safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Scienceworld Object Placer use?

Scienceworld Object Placer is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Scienceworld Object Placer use?

About 468 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 386 tokens, read only when the agent opens those files.

What are the alternatives to Scienceworld Object Placer?

Skills that share tags, products or a category with Scienceworld Object Placer: Object Alt (thedaviddias/Front-End-Checklist, 74k stars), Asset Inventory (sickn33/agentic-awesome-skills, 47k stars), Object Storage (sickn33/agentic-awesome-skills, 47k stars) and Move Code Quality (davila7/claude-code-templates, 32k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Scienceworld Object Placer?

zjunlp (a GitHub organization) maintains it in zjunlp/SkillNet, which has 1,394 GitHub stars. The repository holds 122 skills in this directory. The repository was last updated on October 9, 2026.

Source: zjunlp/SkillNet on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.