Brief
alirezarezvani/claude-skills
/cs:brief <topic — Generate a one-page strategy brief from an office-hours intake.
Turn a user's brief into an editable voxel environment or asset kit in Voxel Worlds.
MITAuto-check passed
Install World Builder
$ npx skills add autonomous-ai/openharness --skill world-builder -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install autonomous-ai/openharness world-builder --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/autonomous-ai/openharness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/store/agents/voxel-worlds/skills/world-builder .claude/skills/world-builder && rm -rf skills-srcUse ~/.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/
Install the "world-builder" agent skill from https://github.com/autonomous-ai/openharness/tree/main/store/agents/voxel-worlds/skills/world-builder into .claude/skills/world-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "world-builder", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/autonomous-ai/openharness/tree/main/store/agents/voxel-worlds/skills/world-builderType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add autonomous-ai/openharness --skill world-builder -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install autonomous-ai/openharness world-builder --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/autonomous-ai/openharness.git skills-src && mkdir -p .agents/skills && cp -r skills-src/store/agents/voxel-worlds/skills/world-builder .agents/skills/world-builder && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "world-builder" agent skill from https://github.com/autonomous-ai/openharness/tree/main/store/agents/voxel-worlds/skills/world-builder into .agents/skills/world-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "world-builder", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add autonomous-ai/openharness --skill world-builder -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install autonomous-ai/openharness world-builder --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/autonomous-ai/openharness.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/store/agents/voxel-worlds/skills/world-builder .cursor/skills/world-builder && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "world-builder" agent skill from https://github.com/autonomous-ai/openharness/tree/main/store/agents/voxel-worlds/skills/world-builder into .cursor/skills/world-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "world-builder", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/autonomous-ai/openharness.git --path store/agents/voxel-worlds/skills/world-builder--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add autonomous-ai/openharness --skill world-builder -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install autonomous-ai/openharness world-builder --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/autonomous-ai/openharness.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/store/agents/voxel-worlds/skills/world-builder .gemini/skills/world-builder && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "world-builder" agent skill from https://github.com/autonomous-ai/openharness/tree/main/store/agents/voxel-worlds/skills/world-builder into .gemini/skills/world-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "world-builder", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install autonomous-ai/openharness world-builderInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add autonomous-ai/openharness --skill world-builder -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/autonomous-ai/openharness.git skills-src && mkdir -p .github/skills && cp -r skills-src/store/agents/voxel-worlds/skills/world-builder .github/skills/world-builder && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "world-builder" agent skill from https://github.com/autonomous-ai/openharness/tree/main/store/agents/voxel-worlds/skills/world-builder into .github/skills/world-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "world-builder", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add autonomous-ai/openharness --skill world-builder -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install autonomous-ai/openharness world-builder --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/autonomous-ai/openharness.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/store/agents/voxel-worlds/skills/world-builder .opencode/skills/world-builder && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "world-builder" agent skill from https://github.com/autonomous-ai/openharness/tree/main/store/agents/voxel-worlds/skills/world-builder into .opencode/skills/world-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "world-builder", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
world-builder- GitHub stars
- 1.1k
- Token cost
- ~1.1k tokens
- SKILL.md length
- 613 words
- Files
- 3 (incl. scripts, references)
- Skills in repo
- 100
- Repo updated
- First seen
- Licence
- MIT
At a glance
Turn a user's brief into an editable voxel environment or asset kit in Voxel Worlds.
- Works in 5 steps: Read the existing project and… → Author boxes and cell edits, with… → Build: node tools/build.mjs. For a… → …
- Original scene design
- SKILL.md covers Build and revise, Supply and save and Export and verify
- Runs Shell scripts from its folder; calls node
What it does
World Builder is an agent skill from autonomous-ai/openharness. Turn a user's brief into an editable voxel environment or asset kit in Voxel Worlds. Use for original scene design, modular assets, terrain sculpting, walkable spaces, importing VOX assets and delivering GLB/VOX files with an offline studio.
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including scripts and reference files (for example `references/project.md` and `scripts/seed-verdict.sh`).
The repository describes itself as: The ultimate harness for coding agents and beyond. All your agents. All your machines. One command center. Start with code, then follow your curiosity and build across… The licence is MIT.
When your agent uses it
- Original scene design
- Terrain sculpting
- Walkable spaces
- Importing VOX assets and delivering GLB/VOX files with an offline studio
Example prompts
- “/world-builder”
Requirements
- A Bash shell
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Read the existing project and world/DESIGN.md. Preserve supplied assets, approved objects,
- Author boxes and cell edits, with generous readable forms at the chosen voxel scale. Shape
- Build: node tools/build.mjs. For a workspace outside the package, VOXEL_DSH_DIR is provided
- Open the actual viewer. Test object selection, transforms, sculpting, materials and save.
- A targeted revision should touch only the requested objects or decisions. Compare preserved
What it can do on your machine
Read from SKILL.md and the folder at commit 50da5db. 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
Ships 1 file in scripts/ (Shell), which the agent can run.
Shell commands in SKILL.md call:
node
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
World Builder loads about 1.1k tokens when it runs, and up to ~1.8k if it reads all its reference files. Until then it costs about 64 tokens; SKILL.md has 613 words of instructions outside code blocks.
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); the scripts in this folder are not scanned.
SKILL.md
The full file from autonomous-ai/openharness at commit 50da5db, republished under its MIT licence (© autonomous-ai). 613 words, ~1,140 tokens.
Download SKILL.mdSave it as
.claude/skills/world-builder/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- world-builder
- description
- Turn a user's brief into an editable voxel environment or asset kit in Voxel Worlds. Use for original scene design, modular assets, terrain sculpting, walkable spaces, importing VOX assets and delivering GLB/VOX files with an offline studio.
From an idea to a world the user can keep building
Understand the place, purpose and deliverable. A game environment, architectural massing study, tabletop kit and miniature scene need different geometry. State sensible assumptions and produce an original first version. Do not funnel the person into the harbor, a style enum or a seed picker.
Read the project contract. The editable source is world/project.json.
Create meaningful named objects with local geometry; use custom palettes and physical scale.
The coding agent authors new geometry and layouts from the brief. The studio's controls edit
that geometry directly; there is no pretend generation button or remote model dependency.
Build and revise
- Read the existing project and
world/DESIGN.md. Preserve supplied assets, approved objects, names, physical scale and decisions unless the user asks to change them. - Author boxes and cell edits, with generous readable forms at the chosen voxel scale. Shape roofs, openings, terrain and paths deliberately. Ensure that different briefs produce different useful structures, not recolored copies of the same scene.
- Build:
node tools/build.mjs. For a workspace outside the package,VOXEL_DSH_DIRis provided by the harness and resolves the installed tools. Setup installs Node and pinned local tools. - Open the actual viewer. Test object selection, transforms, sculpting, materials and save. Walk critical entrances, slopes and destinations with keyboard or touch controls. Check the result from the visitor's viewpoint as well as the overview. Correct geometry, not requirements.
- A targeted revision should touch only the requested objects or decisions. Compare preserved
objects in source and, for an approved asset, its isolated GLB/VOX export before and after.
The studio keeps undo history; workspace saves retain prior sources in
.harness/history/.
Supply and save
The studio can import one static .vox model, including a single-instance transform graph.
Geometry, palette and orientation are preserved; the imported object is rebased for placement in
this world, at this project's physical voxel scale. Multi-model scenes, animation, absent palettes
and hidden assets fail explicitly. Specialized MagicaVoxel shaders are not reproduced.
Save to workspace writes the actual source with a revision check and rebuilds the offline artifact.
An agent revision arriving during a browser edit offers both versions instead of silently replacing
one. Keep the draft download before restoring the source. Open accepts a project file; the local
viewer also offers recent home-folder projects and an explicit path field. Portable HTML uses the
browser file picker. Save a complete .tidelands.json to retain editable object structure.
Show full SKILL.md (207 more words)Show less
Export and verify
Run node tools/check.mjs for geometry, a VOX round trip and finite walking-route checks. It writes
.harness/world-check.json, not a ready verdict. Run node tools/export.mjs for the delivery folder:
- GLB: Y-up, meters, named visible meshes, palette materials and emissive/transparent surfaces.
- VOX: Z-up, flattened visible cells and RGBA palette. Source object boundaries are not in VOX.
- Project JSON: named source objects, rotations, edits, locks, palette, scale, start and destinations.
studio.htmlandwalkthrough.html: standalone files with their runtime embedded, usable offline.- ZIP and README: the files above, plus a finite route-check report.
Browser exports use the current draft, including unsaved changes. Isolated object exports include all of that object's faces, even where it touches other objects. Whole-scene GLB removes buried faces; it is not a collision mesh or physics setup for another engine. Reopen GLB/VOX with an independent reader, inspect scale/orientation/materials, and test the offline files. Report which checks were actually performed; geometry checks do not establish visual quality or a user's “wow.”
Do not publish a world as ready based on file presence or a screenshot alone. Keep the old working handoff while resolving a failing requirement. Return concrete files and concrete revision options in the user's language, without requiring them to learn a 3D editor first.
© autonomous-ai, 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 2 other files (scripts, references) in store/agents/voxel-worlds/skills/world-builder of autonomous-ai/openharness.
- SKILL.md
- references/project.md
- scripts/seed-verdict.sh
Open the folder on GitHubat commit 50da5db
Compare with similar skills
World Builder 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| World Builder this skillautonomous-ai/openharness | 1.1k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Briefalirezarezvani/claude-skills | 28k | — | ~967 | Automated safety check: Pass | MIT | |
| Brief Buildermohitagw15856/pm-claude-skills | 1.4k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Threejs World Generationcalesthio/OpenMontage | 65k | — | ~2k | Automated safety check: Pass | AGPL-3.0 | |
| Copy Editingcoreyhaines31/marketingskills | 54k | — | ~4.5k | Automated safety check: Pass | MIT | |
| Venice Image Editnexu-io/open-design | 100k | — | ~263 | Automated safety check: Pass | Apache-2.0 |
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Brief Builder
mohitagw15856/pm-claude-skills
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calesthio/OpenMontage
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Copy Editing
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When the user wants to edit, review, or improve existing marketing copy, or refresh outdated content.
Venice Image Edit
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Image edits, upscaling, and background removal via the Venice.ai API.
Fal Image Edit
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Questions about World Builder
What does World Builder do?
Turn a user's brief into an editable voxel environment or asset kit in Voxel Worlds. World Builder is an agent skill from autonomous-ai/openharness. Turn a user's brief into an editable voxel environment or asset kit in Voxel Worlds.
When should I use World Builder?
World Builder fits situations like: original scene design; terrain sculpting; walkable spaces; importing VOX assets and delivering GLB/VOX files with an offline studio.
How do I install World Builder in Claude Code?
Run `npx skills add autonomous-ai/openharness --skill world-builder -a claude-code`. Or copy the skill folder (store/agents/voxel-worlds/skills/world-builder in autonomous-ai/openharness) into .claude/skills/world-builder in your project. Claude Code loads it when a task matches its description.
How do I install World Builder in Codex?
Run `npx skills add autonomous-ai/openharness --skill world-builder -a codex`. Or copy the skill folder (store/agents/voxel-worlds/skills/world-builder in autonomous-ai/openharness) into .agents/skills/world-builder in your project. Codex loads it when a task matches its description.
Can I use World Builder 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 autonomous-ai/openharness --skill world-builder -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/world-builder, .gemini/skills/world-builder, .github/skills/world-builder and .opencode/skills/world-builder in your project.
What does World Builder need to run?
Going by SKILL.md and its folder, World Builder needs a shell for the scripts in its folder and the command-line tools its instructions call (node). Our summary lists: A Bash shell.
Does World Builder 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 World Builder 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does World Builder use?
World Builder 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 World Builder use?
About 1.1k tokens (SKILL.md is roughly 4.6k 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 663 tokens, read only when the agent opens those files.
What are the alternatives to World Builder?
Skills that share tags, products or a category with World Builder: Brief (alirezarezvani/claude-skills, 28k stars), Brief Builder (mohitagw15856/pm-claude-skills, 1.4k stars), Threejs World Generation (calesthio/OpenMontage, 65k stars) and Copy Editing (coreyhaines31/marketingskills, 54k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains World Builder?
autonomous-ai (a GitHub organization) maintains it in autonomous-ai/openharness, which has 1,149 GitHub stars. The repository holds 100 skills in this directory. The repository was last updated on October 8, 2026.
Source: autonomous-ai/openharness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.