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A skill your agent uses when hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models, parsing each immediately, deleting clean files, and retaining only actionable…
MITAuto-check passed
Install Compat Hunter
$ npx skills add layoutit/polycss --skill compat-hunter -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install layoutit/polycss compat-hunter --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/layoutit/polycss.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/compat-hunter .claude/skills/compat-hunter && 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 "compat-hunter" agent skill from https://github.com/layoutit/polycss/tree/main/.agents/skills/compat-hunter into .claude/skills/compat-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "compat-hunter", 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/layoutit/polycss/tree/main/.agents/skills/compat-hunterType 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 layoutit/polycss --skill compat-hunter -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install layoutit/polycss compat-hunter --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/layoutit/polycss.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/compat-hunter .agents/skills/compat-hunter && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "compat-hunter" agent skill from https://github.com/layoutit/polycss/tree/main/.agents/skills/compat-hunter into .agents/skills/compat-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "compat-hunter", 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 layoutit/polycss --skill compat-hunter -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install layoutit/polycss compat-hunter --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/layoutit/polycss.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/compat-hunter .cursor/skills/compat-hunter && 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 "compat-hunter" agent skill from https://github.com/layoutit/polycss/tree/main/.agents/skills/compat-hunter into .cursor/skills/compat-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "compat-hunter", 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/layoutit/polycss.git --path .agents/skills/compat-hunter--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 layoutit/polycss --skill compat-hunter -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install layoutit/polycss compat-hunter --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/layoutit/polycss.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/compat-hunter .gemini/skills/compat-hunter && 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 "compat-hunter" agent skill from https://github.com/layoutit/polycss/tree/main/.agents/skills/compat-hunter into .gemini/skills/compat-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "compat-hunter", 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 layoutit/polycss compat-hunterInstalls 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 layoutit/polycss --skill compat-hunter -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/layoutit/polycss.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/compat-hunter .github/skills/compat-hunter && 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 "compat-hunter" agent skill from https://github.com/layoutit/polycss/tree/main/.agents/skills/compat-hunter into .github/skills/compat-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "compat-hunter", 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 layoutit/polycss --skill compat-hunter -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install layoutit/polycss compat-hunter --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/layoutit/polycss.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/compat-hunter .opencode/skills/compat-hunter && 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 "compat-hunter" agent skill from https://github.com/layoutit/polycss/tree/main/.agents/skills/compat-hunter into .opencode/skills/compat-hunter/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "compat-hunter", 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
compat-hunter- GitHub stars
- 757
- Token cost
- ~999 tokens
- SKILL.md length
- 308 words
- Files
- 3 (incl. scripts)
- Skills in repo
- 3
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models, parsing each immediately, deleting clean files, and retaining only actionable…
- Works in 5 steps: In the repo, prefer the reusable script → Let the script stream remote… → Treat these as known non-actionable… → …
- Hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models
- SKILL.md covers Workflow, Useful Commands and Reporting
- Runs JavaScript scripts from its folder; calls pnpm and node
What it does
Compat Hunter is an agent skill from layoutit/polycss. Use when hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models, parsing each immediately, deleting clean files, and retaining only actionable failures, unknown warnings, or unexplained zero-polygon outputs. Especially useful in the polycss repo with scripts/compat-hunter.mjs.
Its SKILL.md is about 1000 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including scripts (for example `agents/openai.yaml`).
It works with GitHub. The repository describes itself as: A CSS 3D engine for the DOM. Renders polygon meshes in HTML by leveraging matrix3d transforms. The licence is MIT.
When your agent uses it
- Hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models
- Parsing each immediately
- Deleting clean files
- Retaining only actionable failures
Example prompts
- “/compat-hunter”
Requirements
- Node.js
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- In the repo, prefer the reusable script
- Let the script stream remote OBJ/GLB/glTF/VOX candidates, parse each model, and discard clean files. Reports are written under…
- Treat these as known non-actionable unless the user asks to support them
- Stop and inspect anything classified as
- If an actionable parser issue is found, keep the saved file under the report's interesting/ directory, add a focused parser test using…
What it can do on your machine
Read from SKILL.md and the folder at commit 04a1b66. 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/ (JavaScript), which the agent can run.
Shell commands in SKILL.md call:
pnpmnode
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pnpm, which can reach the network depending on how they are called.
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
Compat Hunter loads about 999 tokens when it runs. Until then it costs about 81 tokens; SKILL.md has 308 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 layoutit/polycss at commit 04a1b66, republished under its MIT licence (© layoutit). 308 words, ~999 tokens.
Download SKILL.mdSave it as
.claude/skills/compat-hunter/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- compat-hunter
- description
- Use when hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models, parsing each immediately, deleting clean files, and retaining only actionable failures, unknown warnings, or unexplained zero-polygon outputs. Especially useful in the polycss repo with scripts/compat-hunter.mjs.
Compat Hunter
Use this skill when the user wants to keep digging for parser compatibility issues without building a fixed local corpus.
Workflow
In the repo, prefer the reusable script:
bash pnpm compat-hunter -- --max-models 2000Equivalent explicit form:
bash pnpm --filter @layoutit/polycss-core build node .agents/skills/compat-hunter/scripts/compat-hunter.mjs --max-models 2000Let the script stream remote OBJ/GLB/glTF/VOX candidates, parse each model, and discard clean files. Reports are written under
bench/results/, which is ignored by git.Treat these as known non-actionable unless the user asks to support them:
- glTF POINTS/LINES/LINE_LOOP/LINE_STRIP primitives.
- Required Draco or meshopt compressed primitives skipped with a warning.
- STL source-quality diagnostics that the parser already handles: degenerate triangles, repaired winding, component orientation, non-manifold/shared-edge topology, supplied-normal mismatches, malformed normals/facets, overdeclared binary triangle counts, trailing binary bytes, and ignored non-Magics binary attribute bytes.
- Empty/corrupt STL containers with no complete triangle records or no valid ASCII facets.
Stop and inspect anything classified as:
throwunknown-warningobj-zero-no-warningglb-zero-no-warning
If an actionable parser issue is found, keep the saved file under the report's
interesting/directory, add a focused parser test using that behavior, implement the smallest fix, and rerun the focused parser tests plus the hunter on the saved file or source class.
Useful Commands
Fresh Objaverse and expanded GitHub stream:
pnpm compat-hunter -- --max-models 5000 --max-bytes 10mb --timeout-ms 30000Objaverse only, later shards:
pnpm compat-hunter -- --sources objaverse --objaverse-shards 120:220 --max-models 5000GitHub only:
pnpm compat-hunter -- --sources github --max-models 500Poly Haven only:
pnpm compat-hunter -- --sources polyhaven --polyhaven-limit 250 --max-models 200VOX-heavy GitHub sources:
pnpm compat-hunter -- --sources github --github-repos ephtracy/voxel-model@master:vox/,mikelovesrobots/mmmm@master:vox/ --max-models 1000Local directory:
pnpm compat-hunter -- --sources local --local-root /tmp/models --max-models 1000Keep known-warning files too:
pnpm compat-hunter -- --keep-known --max-models 500For STL hunts, --keep-known keeps warning-only models under known/ and the report includes warningCategoriesByKind plus stlDiagnostics on retained rows. Unknown STL warning text, throws, zero-polygon outputs, and suspicious DOM collapses remain interesting/.
Avoid repeating the same shuffled queue:
pnpm compat-hunter -- --sources thingi10k --exts stl --max-models 5000 --seed "$(date +%s)" --queue-offset 5000Skip models already attempted by prior reports:
pnpm compat-hunter -- --sources thingi10k --exts stl --max-models 5000 --skip-report bench/results/<previous-run>/report.jsonContinue after interesting cases:
pnpm compat-hunter -- --no-stop-on-interesting --max-models 2000Reporting
Summarize the final report.json with:
pnpm compat-hunter -- --report bench/results/<run>/report.jsonIn the final response, state the attempted/parsed counts, whether any interesting files were retained, and whether the findings are actionable. Do not imply a clean stream proves full compatibility; it only means this pass found no new actionable parser issue.
© layoutit, 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) in .agents/skills/compat-hunter of layoutit/polycss.
- SKILL.md
- agents/openai.yaml
- scripts/compat-hunter.mjs
Open the folder on GitHubat commit 04a1b66
Compare with similar skills
Compat Hunter 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 |
|---|---|---|---|---|---|---|
| Compat Hunter this skilllayoutit/polycss | 757 | — | ~999 | Automated safety check: Pass | MIT | |
| PR Babysitteropeninterpreter/openinterpreter | 69k | 3 repos | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Diagnosing Superpowers Sessionsobra/superpowers | 296k | 3 repos | ~1.7k | Automated safety check: Pass | MIT | |
| GitHub Deep Researchbytedance/deer-flow | 83k | 5 repos | ~1.3k | Automated safety check: Pass | MIT | |
| Greplooponyx-dot-app/onyx | 32k | 4 repos | ~3.3k | Automated safety check: Pass | MIT | |
| Update V8 Versionopeninterpreter/openinterpreter | 69k | 2 repos | ~845 | Automated safety check: Pass | Apache-2.0 |
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Questions about Compat Hunter
What does Compat Hunter do?
A skill your agent uses when hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models, parsing each immediately, deleting clean files, and retaining only actionable…. Compat Hunter is an agent skill from layoutit/polycss. Use when hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models, parsing each immediately, deleting clean files, and retaining only actionable failures, unknown warnings, or unexplained zero-polygon outputs.
When should I use Compat Hunter?
Compat Hunter fits situations like: hunting for OBJ/GLB/glTF/VOX parser compatibility issues by streaming candidate models; parsing each immediately; deleting clean files; retaining only actionable failures.
How do I install Compat Hunter in Claude Code?
Run `npx skills add layoutit/polycss --skill compat-hunter -a claude-code`. Or copy the skill folder (.agents/skills/compat-hunter in layoutit/polycss) into .claude/skills/compat-hunter in your project. Claude Code loads it when a task matches its description.
How do I install Compat Hunter in Codex?
Run `npx skills add layoutit/polycss --skill compat-hunter -a codex`. Or copy the skill folder (.agents/skills/compat-hunter in layoutit/polycss) into .agents/skills/compat-hunter in your project. Codex loads it when a task matches its description.
Can I use Compat Hunter 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 layoutit/polycss --skill compat-hunter -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/compat-hunter, .gemini/skills/compat-hunter, .github/skills/compat-hunter and .opencode/skills/compat-hunter in your project.
What does Compat Hunter need to run?
Going by SKILL.md and its folder, Compat Hunter needs JavaScript for the scripts in its folder and the command-line tools its instructions call (pnpm and node). Our summary lists: Node.js.
Does Compat Hunter 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 Compat Hunter 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 Compat Hunter use?
Compat Hunter 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 Compat Hunter use?
About 999 tokens (SKILL.md is roughly 4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Compat Hunter?
Skills that share tags, products or a category with Compat Hunter: PR Babysitter (openinterpreter/openinterpreter, 69k stars), Diagnosing Superpowers Sessions (obra/superpowers, 296k stars), GitHub Deep Research (bytedance/deer-flow, 83k stars) and Greploop (onyx-dot-app/onyx, 32k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Compat Hunter?
layoutit (a GitHub organization) maintains it in layoutit/polycss, which has 757 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on August 25, 2026.
Source: layoutit/polycss on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.