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openclaw/openclaw
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D&D-kit combat mechanics — initiative, attack/damage resolution, XP-by-CR awards, combat modifiers, and death saves.
Custom licenceAuto-check passed
Install Gm Combat
$ npx skills add Sstobo/Claude-Code-Game-Master --skill gm-combat -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-combat --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/Sstobo/Claude-Code-Game-Master.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/gm-combat .claude/skills/gm-combat && 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 "gm-combat" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-combat into .claude/skills/gm-combat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-combat", 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/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-combatType 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 Sstobo/Claude-Code-Game-Master --skill gm-combat -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-combat --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Sstobo/Claude-Code-Game-Master.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/gm-combat .agents/skills/gm-combat && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "gm-combat" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-combat into .agents/skills/gm-combat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-combat", 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 Sstobo/Claude-Code-Game-Master --skill gm-combat -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-combat --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Sstobo/Claude-Code-Game-Master.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/gm-combat .cursor/skills/gm-combat && 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 "gm-combat" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-combat into .cursor/skills/gm-combat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-combat", 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/Sstobo/Claude-Code-Game-Master.git --path .claude/skills/gm-combat--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 Sstobo/Claude-Code-Game-Master --skill gm-combat -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-combat --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Sstobo/Claude-Code-Game-Master.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/gm-combat .gemini/skills/gm-combat && 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 "gm-combat" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-combat into .gemini/skills/gm-combat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-combat", 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 Sstobo/Claude-Code-Game-Master gm-combatInstalls 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 Sstobo/Claude-Code-Game-Master --skill gm-combat -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Sstobo/Claude-Code-Game-Master.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/gm-combat .github/skills/gm-combat && 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 "gm-combat" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-combat into .github/skills/gm-combat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-combat", 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 Sstobo/Claude-Code-Game-Master --skill gm-combat -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-combat --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Sstobo/Claude-Code-Game-Master.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/gm-combat .opencode/skills/gm-combat && 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 "gm-combat" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-combat into .opencode/skills/gm-combat/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-combat", 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
gm-combat- GitHub stars
- 155
- Token cost
- ~686 tokens
- SKILL.md length
- 350 words
- Files
- 1
- Skills in repo
- 8
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
D&D-kit combat mechanics — initiative, attack/damage resolution, XP-by-CR awards, combat modifiers, and death saves.
- Works in 4 steps: Get enemy stats… → Initiative: uv run python lib/dice.py… → Each turn: attack 1d20+bonus vs AC; on… → …
- SKILL.md covers Flow, XP by Challenge Rating, Modifiers and Death & Dying
- Calls bash and uv
What it does
Gm Combat is an agent skill from Sstobo/Claude-Code-Game-Master. D&D-kit combat mechanics — initiative, attack/damage resolution, XP-by-CR awards, combat modifiers, and death saves. Load when a hostile action is declared or combat starts in a campaign whose World Kit is dnd5e. For non-D&D kits, use the generic core (gamecore.py) and the active ruleset instead.
Its SKILL.md is about 690 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: Total conversion for Claude Code. Use RAG and the RPG ruleset apis to play a persistent adventure in any book or world of your choosing.
Example prompts
- “/gm-combat”
Requirements
- Python 3
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Get enemy stats (features/dnd-api/monsters/dnd_monster.py "[creature]" --combat or quick: AC 13, HP 15, +3, 1d6+1).
- Initiative: uv run python lib/dice.py "1d20+[dex]" per combatant; order high→low.
- Each turn: attack 1d20+bonus vs AC; on hit roll damage; update HP via gm-combat.sh hp.
- Resolution: award XP, handle loot (persist BEFORE narrating), advance time.
What it can do on your machine
Read from SKILL.md and the folder at commit dea9931. 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
Shell commands in SKILL.md call:
bashuv
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uv, 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
Gm Combat loads about 686 tokens when it runs. Until then it costs about 77 tokens; SKILL.md has 350 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 350 words (~686 tokens).
“STEP 0 — KIT GUARD. If the scene-context KIT block is not dnd5e, close this skill and resolve the fight through the generic core (game_core) and the active ruleset.”
- name
- gm-combat
Files
Just SKILL.md in .claude/skills/gm-combat of Sstobo/Claude-Code-Game-Master.
Open the folder on GitHubat commit dea9931
Compare with similar skills
Gm Combat 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 |
|---|---|---|---|---|---|---|
| Gm Combat this skillSstobo/Claude-Code-Game-Master | 155 | — | ~686 | Automated safety check: Pass | Custom licence | |
| Block Kitopenclaw/openclaw | 392k | — | ~624 | Automated safety check: Pass | MIT | |
| Kit AutomationComposioHQ/awesome-claude-skills | 77k | 3 repos | ~715 | Automated safety check: Pass | None | |
| Context Kitsickn33/agentic-awesome-skills | 47k | 1 repos | ~1.5k | Automated safety check: Pass | MIT | |
| Initiate SetupNousResearch/hermes-agent | 252k | — | ~2.3k | Automated safety check: Pass | MIT | |
| Attack Tree Constructionwshobson/agents | 40k | 8 repos | ~623 | Automated safety check: Pass | MIT |
Similar skills
Kit Automation
ComposioHQ/awesome-claude-skills
Automate Kit tasks via Rube MCP (Composio). An agent skill from ComposioHQ/awesome-claude-skills.
Context Kit
sickn33/agentic-awesome-skills
Evaluate, adapt, and safely install Context Kit personal context artifacts for Claude Code or adjacent agent workflows.
Initiate Setup
NousResearch/hermes-agent
Run the first-run setup chat in the Hermes desktop app. An agent skill from NousResearch/hermes-agent.
Attack Tree Construction
wshobson/agents
Builds attack trees that map how an attacker could reach a goal, with AND and OR nodes and cost, time, skill and detection ratings, to find defense gaps.
Detecting Kerberoasting Attacks
mukul975/Anthropic-Cybersecurity-Skills
Detect Kerberoasting attacks by monitoring for anomalous Kerberos TGS requests (Event ID 4769) targeting service accounts with SPNs, which attackers request offline to crack service account passwords.
More from Sstobo/Claude-Code-Game-Master
All 8 skills in this repoGm Social
Sstobo/Claude-Code-Game-Master
Social / NPC interaction workflow — load NPC context, attitude check, social mechanics (Persuasion/Deception/Intimidation/Insight DCs), and persisting NPC memory + consequences.
Gm Skills
Sstobo/Claude-Code-Game-Master
Skill-check resolution — when to roll, the DC ladder, fail-forward philosophy, and margin-based consequences.
Gm Dungeon
Sstobo/Claude-Code-Game-Master
Dungeon exploration — lightweight (narrative, default) vs structured (per-room JSON) modes, exit/obstacle handling, and ASCII map symbols.
Gm Craft
Sstobo/Claude-Code-Game-Master
The Art of Game Mastering — narration, NPC, pacing, and improvisation wisdom that makes a session feel magical.
Gm Levelup
Sstobo/Claude-Code-Game-Master
D&D-kit leveling — XP thresholds, the level-up ceremony, hit dice by class, and ASI/feat/subclass handling.
Gm Spellcasting
Sstobo/Claude-Code-Game-Master
D&D-kit spellcasting mechanics — spell slots by level, casting resolution, and concentration.
Questions about Gm Combat
What does Gm Combat do?
D&D-kit combat mechanics — initiative, attack/damage resolution, XP-by-CR awards, combat modifiers, and death saves. Gm Combat is an agent skill from Sstobo/Claude-Code-Game-Master. D&D-kit combat mechanics — initiative, attack/damage resolution, XP-by-CR awards, combat modifiers, and death saves.
How do I install Gm Combat in Claude Code?
Run `npx skills add Sstobo/Claude-Code-Game-Master --skill gm-combat -a claude-code`. Or copy the skill folder (.claude/skills/gm-combat in Sstobo/Claude-Code-Game-Master) into .claude/skills/gm-combat in your project. Claude Code loads it when a task matches its description.
How do I install Gm Combat in Codex?
Run `npx skills add Sstobo/Claude-Code-Game-Master --skill gm-combat -a codex`. Or copy the skill folder (.claude/skills/gm-combat in Sstobo/Claude-Code-Game-Master) into .agents/skills/gm-combat in your project. Codex loads it when a task matches its description.
Can I use Gm Combat 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 Sstobo/Claude-Code-Game-Master --skill gm-combat -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gm-combat, .gemini/skills/gm-combat, .github/skills/gm-combat and .opencode/skills/gm-combat in your project.
What does Gm Combat need to run?
Going by SKILL.md and its folder, Gm Combat needs the command-line tools its instructions call (bash and uv). Our summary lists: Python 3.
Does Gm Combat access the network?
SKILL.md contains no URLs. Its commands use uv, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Gm Combat 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 Gm Combat use?
Gm Combat 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 Gm Combat use?
About 686 tokens (SKILL.md is roughly 2.7k 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 Gm Combat?
Skills that share tags, products or a category with Gm Combat: Block Kit (openclaw/openclaw, 392k stars), Kit Automation (ComposioHQ/awesome-claude-skills, 77k stars), Context Kit (sickn33/agentic-awesome-skills, 47k stars) and Initiate Setup (NousResearch/hermes-agent, 252k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Gm Combat?
Sstobo (a GitHub user) maintains it in Sstobo/Claude-Code-Game-Master, which has 155 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on August 16, 2026.
Source: Sstobo/Claude-Code-Game-Master on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.