MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Guide for writing MoonBit bindings to C libraries using native FFI.
Install Moonbit C Binding
$ npx skills add golemcloud/golem --skill moonbit-c-binding -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install golemcloud/golem moonbit-c-binding --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/golemcloud/golem.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/moonbit-c-binding .claude/skills/moonbit-c-binding && 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 "moonbit-c-binding" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-c-binding into .claude/skills/moonbit-c-binding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-c-binding", 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/golemcloud/golem/tree/main/.agents/skills/moonbit-c-bindingType 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 golemcloud/golem --skill moonbit-c-binding -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install golemcloud/golem moonbit-c-binding --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/golemcloud/golem.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/moonbit-c-binding .agents/skills/moonbit-c-binding && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "moonbit-c-binding" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-c-binding into .agents/skills/moonbit-c-binding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-c-binding", 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 golemcloud/golem --skill moonbit-c-binding -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install golemcloud/golem moonbit-c-binding --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/golemcloud/golem.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/moonbit-c-binding .cursor/skills/moonbit-c-binding && 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 "moonbit-c-binding" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-c-binding into .cursor/skills/moonbit-c-binding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-c-binding", 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/golemcloud/golem.git --path .agents/skills/moonbit-c-binding--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 golemcloud/golem --skill moonbit-c-binding -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install golemcloud/golem moonbit-c-binding --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/golemcloud/golem.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/moonbit-c-binding .gemini/skills/moonbit-c-binding && 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 "moonbit-c-binding" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-c-binding into .gemini/skills/moonbit-c-binding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-c-binding", 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 golemcloud/golem moonbit-c-bindingInstalls 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 golemcloud/golem --skill moonbit-c-binding -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/golemcloud/golem.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/moonbit-c-binding .github/skills/moonbit-c-binding && 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 "moonbit-c-binding" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-c-binding into .github/skills/moonbit-c-binding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-c-binding", 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 golemcloud/golem --skill moonbit-c-binding -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install golemcloud/golem moonbit-c-binding --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/golemcloud/golem.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/moonbit-c-binding .opencode/skills/moonbit-c-binding && 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 "moonbit-c-binding" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-c-binding into .opencode/skills/moonbit-c-binding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-c-binding", 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
moonbit-c-binding- GitHub stars
- 1.5k
- Token cost
- ~3k tokens
- SKILL.md length
- 1,091 words
- Files
- 7 (incl. scripts, references)
- Skills in repo
- 289
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Guide for writing MoonBit bindings to C libraries using native FFI.
- Works in 4 steps: Project Setup → FFI Layer → MoonBit API → …
- Adding extern c declarations
- SKILL.md covers When To Use, Plan Mode Instructions, Type Mapping and Workflow, plus 3 more sections
- Runs Python scripts from its folder; calls python3
What it does
Moonbit C Binding is an agent skill from golemcloud/golem. Guide for writing MoonBit bindings to C libraries using native FFI. Use when adding extern "c" declarations, writing C stubs with moonbit.h, configuring native-stub and link.native in moon.pkg, choosing
Its SKILL.md is about 3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including scripts and reference files (for example `references/asan-validation.md`, `references/callbacks.md` and `references/including-c-sources.md`).
It sits in Agent Workflows. The repository describes itself as: Golem Cloud is the agent-native platform for building AI agents and distributed applications that never lose state, never duplicate work, and never require you to build…
When your agent uses it
- Adding extern c declarations
- Writing C stubs with moonbit.h
- Configuring native-stub and link.native in moon.pkg
Example prompts
- “/moonbit-c-binding”
Requirements
- Python 3
Workflow steps
4 steps, taken from the step headings in SKILL.md.
- Project Setup
- FFI Layer
- MoonBit API
- Testing
What it can do on your machine
Read from SKILL.md and the folder at commit c6a3029. 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 2 files in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
python3
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
Moonbit C Binding loads about 3k tokens when it runs, and up to ~6.9k if it reads all its reference files. Until then it costs about 55 tokens; SKILL.md has 1,091 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,091 words (~3,036 tokens).
“Step-by-step workflow for binding any C library to MoonBit using native FFI.”
- name
- moonbit-c-binding
Files
SKILL.md and 6 other files (scripts, references) in .agents/skills/moonbit-c-binding of golemcloud/golem.
- SKILL.md
- references/asan-validation.md
- references/callbacks.md
- references/including-c-sources.md
- references/ownership-and-memory.md
- scripts/.gitignore
- scripts/run-asan.py
Open the folder on GitHubat commit c6a3029
Compare with similar skills
Moonbit C Binding 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 |
|---|---|---|---|---|---|---|
| Moonbit C Binding this skillgolemcloud/golem | 1.5k | — | ~3k | Automated safety check: Pass | Custom licence | |
| MCP Server Builderanthropics/skills | 180k | 64 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 11 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 35 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 296k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 8 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 |
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Categories
Questions about Moonbit C Binding
What does Moonbit C Binding do?
Guide for writing MoonBit bindings to C libraries using native FFI. Moonbit C Binding is an agent skill from golemcloud/golem. Guide for writing MoonBit bindings to C libraries using native FFI.
When should I use Moonbit C Binding?
Moonbit C Binding fits situations like: adding extern c declarations; writing C stubs with moonbit.h; configuring native-stub and link.native in moon.pkg.
How do I install Moonbit C Binding in Claude Code?
Run `npx skills add golemcloud/golem --skill moonbit-c-binding -a claude-code`. Or copy the skill folder (.agents/skills/moonbit-c-binding in golemcloud/golem) into .claude/skills/moonbit-c-binding in your project. Claude Code loads it when a task matches its description.
How do I install Moonbit C Binding in Codex?
Run `npx skills add golemcloud/golem --skill moonbit-c-binding -a codex`. Or copy the skill folder (.agents/skills/moonbit-c-binding in golemcloud/golem) into .agents/skills/moonbit-c-binding in your project. Codex loads it when a task matches its description.
Can I use Moonbit C Binding 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 golemcloud/golem --skill moonbit-c-binding -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/moonbit-c-binding, .gemini/skills/moonbit-c-binding, .github/skills/moonbit-c-binding and .opencode/skills/moonbit-c-binding in your project.
What does Moonbit C Binding need to run?
Going by SKILL.md and its folder, Moonbit C Binding needs Python for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3.
Does Moonbit C Binding 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 Moonbit C Binding 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 Moonbit C Binding use?
Moonbit C Binding 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 Moonbit C Binding use?
About 3k tokens (SKILL.md is roughly 12k 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 3.8k tokens, read only when the agent opens those files.
What are the alternatives to Moonbit C Binding?
Skills that share tags, products or a category with Moonbit C Binding: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 296k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Moonbit C Binding?
golemcloud (a GitHub organization) maintains it in golemcloud/golem, which has 1,507 GitHub stars. The repository holds 289 skills in this directory. The repository was last updated on October 8, 2026.
Source: golemcloud/golem on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.