Hook Development for Claude Code Plugins
anthropics/claude-plugins-official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
Social / NPC interaction workflow — load NPC context, attitude check, social mechanics (Persuasion/Deception/Intimidation/Insight DCs), and persisting NPC memory + consequences.
Custom licenceAuto-check passed
Install Gm Social
$ npx skills add Sstobo/Claude-Code-Game-Master --skill gm-social -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-social --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-social .claude/skills/gm-social && 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-social" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-social into .claude/skills/gm-social/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-social", 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-socialType 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-social -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-social --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-social .agents/skills/gm-social && 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-social" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-social into .agents/skills/gm-social/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-social", 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-social -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-social --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-social .cursor/skills/gm-social && 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-social" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-social into .cursor/skills/gm-social/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-social", 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-social--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-social -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Sstobo/Claude-Code-Game-Master gm-social --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-social .gemini/skills/gm-social && 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-social" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-social into .gemini/skills/gm-social/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-social", 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-socialInstalls 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-social -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-social .github/skills/gm-social && 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-social" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-social into .github/skills/gm-social/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-social", 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-social -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-social --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-social .opencode/skills/gm-social && 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-social" agent skill from https://github.com/Sstobo/Claude-Code-Game-Master/tree/main/.claude/skills/gm-social into .opencode/skills/gm-social/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "gm-social", 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-social- GitHub stars
- 155
- Token cost
- ~1k tokens
- SKILL.md length
- 510 words
- Files
- 1
- Skills in repo
- 8
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Social / NPC interaction workflow — load NPC context, attitude check, social mechanics (Persuasion/Deception/Intimidation/Insight DCs), and persisting NPC memory + consequences.
- Works in 5 steps: Load NPC context → Attitude → Social mechanics — when to roll → …
- SKILL.md covers 1. Load NPC context, 1b. Flesh a stub on first real…, 2. Attitude and 3. Social mechanics — when to…, plus 5 more sections
- Calls bash
What it does
Gm Social is an agent skill from 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. Load whenever the player talks to, persuades, or reads an NPC ("I talk to...", "I ask...").
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with Bash. 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
- “I talk to...”
- “I ask...”
- “/gm-social”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Load NPC context
- Attitude
- Social mechanics — when to roll
- Persist NPC memory
- Consequences
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:
bash
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
Gm Social loads about 1k tokens when it runs. Until then it costs about 70 tokens; SKILL.md has 510 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 510 words (~1,025 tokens).
“The DCs below are 5e — use them only when the scene-context KIT block says dnd5e.”
- name
- gm-social
Files
Just SKILL.md in .claude/skills/gm-social of Sstobo/Claude-Code-Game-Master.
Open the folder on GitHubat commit dea9931
Compare with similar skills
Gm Social 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 Social this skillSstobo/Claude-Code-Game-Master | 155 | — | ~1k | Automated safety check: Pass | Custom licence | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 10 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Plugin Settings Patternanthropics/claude-plugins-official | 38k | 7 repos | ~3k | Automated safety check: Pass | Apache-2.0 | |
| E2Ecallstack/react-native-pager-view | 3.4k | 3 repos | ~2.1k | Automated safety check: Pass | MIT | |
| Mole Bug Patternstw93/Mole | 70k | — | ~2k | Automated safety check: Pass | GPL-3.0 | |
| Neat-Freak Knowledge CloseoutKKKKhazix/khazix-skills | 21k | — | ~1.9k | Automated safety check: Pass | MIT |
Similar skills
- Official
- Official
Plugin Settings Pattern
anthropics/claude-plugins-official
Shows how Claude Code plugins keep per-project settings and state in .claude/plugin-name.local.md files with YAML frontmatter and a markdown body.
E2E
callstack/react-native-pager-view
Agentic end-to-end tests with e2e, the e2e runner. An agent skill from callstack/react-native-pager-view.
Mole Bug Patterns
tw93/Mole
A catalog of recurring bug shapes in the Mole Mac cleaner, used to review safety-sensitive diffs for deletion safety, unbounded commands, shell traps and weak tests.
Neat-Freak Knowledge Closeout
KKKKhazix/khazix-skills
Brings project docs, agent rule files, authorized memory and leftover workspace files back in line with what the code and runtime actually do at the end of a work session.
CCPM Project Management
automazeio/ccpm
Runs a spec-driven workflow from PRD to epic to GitHub issues to parallel agents, with status, standup and blocked-work reports from bundled scripts.
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Gm Skills
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Skill-check resolution — when to roll, the DC ladder, fail-forward philosophy, and margin-based consequences.
Gm Dungeon
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Dungeon exploration — lightweight (narrative, default) vs structured (per-room JSON) modes, exit/obstacle handling, and ASCII map symbols.
Gm Craft
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The Art of Game Mastering — narration, NPC, pacing, and improvisation wisdom that makes a session feel magical.
Gm Levelup
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D&D-kit leveling — XP thresholds, the level-up ceremony, hit dice by class, and ASI/feat/subclass handling.
Gm Spellcasting
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D&D-kit spellcasting mechanics — spell slots by level, casting resolution, and concentration.
Related
Works with
Questions about Gm Social
What does Gm Social do?
Social / NPC interaction workflow — load NPC context, attitude check, social mechanics (Persuasion/Deception/Intimidation/Insight DCs), and persisting NPC memory + consequences. Gm Social is an agent skill from 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.
How do I install Gm Social in Claude Code?
Run `npx skills add Sstobo/Claude-Code-Game-Master --skill gm-social -a claude-code`. Or copy the skill folder (.claude/skills/gm-social in Sstobo/Claude-Code-Game-Master) into .claude/skills/gm-social in your project. Claude Code loads it when a task matches its description.
How do I install Gm Social in Codex?
Run `npx skills add Sstobo/Claude-Code-Game-Master --skill gm-social -a codex`. Or copy the skill folder (.claude/skills/gm-social in Sstobo/Claude-Code-Game-Master) into .agents/skills/gm-social in your project. Codex loads it when a task matches its description.
Can I use Gm Social 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-social -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-social, .gemini/skills/gm-social, .github/skills/gm-social and .opencode/skills/gm-social in your project.
What does Gm Social need to run?
Going by SKILL.md and its folder, Gm Social needs the command-line tools its instructions call (bash).
Does Gm Social 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 Gm Social 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 Social use?
Gm Social 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 Social use?
About 1k tokens (SKILL.md is roughly 4.1k 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 Social?
Skills that share tags, products or a category with Gm Social: Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Plugin Settings Pattern (anthropics/claude-plugins-official, 38k stars), E2E (callstack/react-native-pager-view, 3.4k stars) and Mole Bug Patterns (tw93/Mole, 70k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Gm Social?
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.