Video Understand
calesthio/OpenMontage
Understand video content locally using ffmpeg frame extraction and Whisper transcription.
Guide to understanding and modifying GnollHack game data files including level descriptions (.des), dungeon definitions, text databases, and the data compilation pipeline from source text to nhdat…
Custom licenceAuto-check passed
Install Game Data Files
$ npx skills add hyvanmielenpelit/GnollHack --skill game-data-files -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install hyvanmielenpelit/GnollHack game-data-files --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/hyvanmielenpelit/GnollHack.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/game-data-files .claude/skills/game-data-files && 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 "game-data-files" agent skill from https://github.com/hyvanmielenpelit/GnollHack/tree/master/.claude/skills/game-data-files into .claude/skills/game-data-files/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "game-data-files", 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/hyvanmielenpelit/GnollHack/tree/master/.claude/skills/game-data-filesType 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 hyvanmielenpelit/GnollHack --skill game-data-files -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install hyvanmielenpelit/GnollHack game-data-files --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hyvanmielenpelit/GnollHack.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/game-data-files .agents/skills/game-data-files && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "game-data-files" agent skill from https://github.com/hyvanmielenpelit/GnollHack/tree/master/.claude/skills/game-data-files into .agents/skills/game-data-files/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "game-data-files", 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 hyvanmielenpelit/GnollHack --skill game-data-files -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install hyvanmielenpelit/GnollHack game-data-files --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hyvanmielenpelit/GnollHack.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/game-data-files .cursor/skills/game-data-files && 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 "game-data-files" agent skill from https://github.com/hyvanmielenpelit/GnollHack/tree/master/.claude/skills/game-data-files into .cursor/skills/game-data-files/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "game-data-files", 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/hyvanmielenpelit/GnollHack.git --path .claude/skills/game-data-files--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 hyvanmielenpelit/GnollHack --skill game-data-files -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install hyvanmielenpelit/GnollHack game-data-files --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hyvanmielenpelit/GnollHack.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/game-data-files .gemini/skills/game-data-files && 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 "game-data-files" agent skill from https://github.com/hyvanmielenpelit/GnollHack/tree/master/.claude/skills/game-data-files into .gemini/skills/game-data-files/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "game-data-files", 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 hyvanmielenpelit/GnollHack game-data-filesInstalls 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 hyvanmielenpelit/GnollHack --skill game-data-files -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/hyvanmielenpelit/GnollHack.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/game-data-files .github/skills/game-data-files && 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 "game-data-files" agent skill from https://github.com/hyvanmielenpelit/GnollHack/tree/master/.claude/skills/game-data-files into .github/skills/game-data-files/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "game-data-files", 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 hyvanmielenpelit/GnollHack --skill game-data-files -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install hyvanmielenpelit/GnollHack game-data-files --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hyvanmielenpelit/GnollHack.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/game-data-files .opencode/skills/game-data-files && 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 "game-data-files" agent skill from https://github.com/hyvanmielenpelit/GnollHack/tree/master/.claude/skills/game-data-files into .opencode/skills/game-data-files/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "game-data-files", 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
game-data-files- GitHub stars
- 161
- Token cost
- ~152 tokens
- SKILL.md length
- 51 words
- Files
- 1
- Skills in repo
- 11
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Guide to understanding and modifying GnollHack game data files including level descriptions (.des), dungeon definitions, text databases, and the data compilation pipeline from source text to nhdat…
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Game Data Files is an agent skill from hyvanmielenpelit/GnollHack. Guide to understanding and modifying GnollHack game data files including level descriptions (.des), dungeon definitions, text databases, and the data compilation pipeline from source text to nhdat archive.
Its SKILL.md is about 150 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: Modern evolution of the classic roguelike game NetHack.
Example prompts
- “/game-data-files”
What it can do on your machine
Read from SKILL.md and the folder at commit 4f76e12. 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
Game Data Files loads about 152 tokens when it runs. Until then it costs about 55 tokens; SKILL.md has 51 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); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 51 words (~152 tokens).
“The full skill lives in this repository's tool-neutral agent directory (.agents/), which is shared with other AI coding agents. This file is only a pointer.”
- name
- game-data-files
Files
Just SKILL.md in .claude/skills/game-data-files of hyvanmielenpelit/GnollHack.
Open the folder on GitHubat commit 4f76e12
Compare with similar skills
Game Data Files 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 |
|---|---|---|---|---|---|---|
| Game Data Files this skillhyvanmielenpelit/GnollHack | 161 | — | ~152 | Automated safety check: Pass | Custom licence | |
| Video Understandcalesthio/OpenMontage | 66k | — | ~841 | Automated safety check: Pass | AGPL-3.0 | |
| Understand ExplainEgonex-AI/Understand-Anything | 86k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Understanding by Design PlannerTHU-MAIC/OpenMAIC | 40k | — | ~548 | Automated safety check: Pass | MIT | |
| Understand Diff AnalysisEgonex-AI/Understand-Anything | 86k | — | ~1.4k | Automated safety check: Pass | MIT | |
| Understand Issuemastra-ai/mastra | 29k | — | ~3.1k | Automated safety check: Pass | Custom licence |
Similar skills
Understand Explain
Egonex-AI/Understand-Anything
Gives an in-depth explanation of one file, function or module by reading the project's knowledge graph and checking that the graph is still fresh.
Understanding by Design Planner
THU-MAIC/OpenMAIC
Plans an OpenMAIC lesson or course series by backward design: enduring understandings and essential questions first, then performance evidence, then learning activities.
Understand Diff Analysis
Egonex-AI/Understand-Anything
Reads your git changes or a pull request against a prebuilt knowledge graph of the project to explain what changed, which components are affected and what is risky.
Understand Issue
mastra-ai/mastra
Investigate a GitHub issue or reported bug the way a seasoned maintainer would — form an independent model before reading the thread's theories, trace the mechanism and history, verify the…
Understand PR
mastra-ai/mastra
Review a PR the way a seasoned maintainer would — build an independent model before seeing the diff, investigate the implementation and history, verify material claims, and return a concise briefing.
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Implementation planning overlay for the GnollHack client repository.
Sentry Crash Analysis
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Systematic methodology for diagnosing GnollHack crash reports from the Sentry MCP server.
Adding Game Content
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Patterns for adding monsters, objects, and artifacts to GnollHack.
Build Pipeline
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Guide on building GnollHack native C libraries, processing assets with makedefs/levcomp/dgncomp/dlb, packaging nhdat, and compiling the C .NET MAUI frontend for Android, iOS, and Windows.
C Code Documentation
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Best practices for AI agents documenting the GnollHack C codebase.
Client Subagent Guidelines
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Subagent constraints specific to the GnollHack client repository.
Questions about Game Data Files
What does Game Data Files do?
Guide to understanding and modifying GnollHack game data files including level descriptions (.des), dungeon definitions, text databases, and the data compilation pipeline from source text to nhdat…. Game Data Files is an agent skill from hyvanmielenpelit/GnollHack.des), dungeon definitions, text databases, and the data compilation pipeline from source text to nhdat archive.
How do I install Game Data Files in Claude Code?
Run `npx skills add hyvanmielenpelit/GnollHack --skill game-data-files -a claude-code`. Or copy the skill folder (.claude/skills/game-data-files in hyvanmielenpelit/GnollHack) into .claude/skills/game-data-files in your project. Claude Code loads it when a task matches its description.
How do I install Game Data Files in Codex?
Run `npx skills add hyvanmielenpelit/GnollHack --skill game-data-files -a codex`. Or copy the skill folder (.claude/skills/game-data-files in hyvanmielenpelit/GnollHack) into .agents/skills/game-data-files in your project. Codex loads it when a task matches its description.
Can I use Game Data Files 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 hyvanmielenpelit/GnollHack --skill game-data-files -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/game-data-files, .gemini/skills/game-data-files, .github/skills/game-data-files and .opencode/skills/game-data-files in your project.
What does Game Data Files need to run?
SKILL.md names no scripts, command-line tools or credentials: Game Data Files is instructions for the agent only.
Does Game Data Files 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 Game Data Files 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 Game Data Files use?
Game Data Files has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Game Data Files use?
About 152 tokens (SKILL.md is roughly 608 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 Game Data Files?
Skills that share tags, products or a category with Game Data Files: Video Understand (calesthio/OpenMontage, 66k stars), Understand Explain (Egonex-AI/Understand-Anything, 86k stars), Understanding by Design Planner (THU-MAIC/OpenMAIC, 40k stars) and Understand Diff Analysis (Egonex-AI/Understand-Anything, 86k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Game Data Files?
hyvanmielenpelit (a GitHub organization) maintains it in hyvanmielenpelit/GnollHack, which has 161 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on October 9, 2026.
Source: hyvanmielenpelit/GnollHack on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.