Guidelines
akash-network/node
Behavioral guidelines to reduce common LLM coding mistakes. An agent skill from akash-network/node.
A skill your agent uses when writing or refactoring proof-carrying code in MoonBit, especially for Why3-backed specifications, abstraction functions, representation invariants, proof assertions…
Install Moonbit Proof
$ npx skills add golemcloud/golem --skill moonbit-proof -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install golemcloud/golem moonbit-proof --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-proof .claude/skills/moonbit-proof && 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-proof" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-proof into .claude/skills/moonbit-proof/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-proof", 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-proofType 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-proof -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install golemcloud/golem moonbit-proof --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-proof .agents/skills/moonbit-proof && 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-proof" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-proof into .agents/skills/moonbit-proof/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-proof", 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-proof -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install golemcloud/golem moonbit-proof --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-proof .cursor/skills/moonbit-proof && 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-proof" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-proof into .cursor/skills/moonbit-proof/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-proof", 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-proof--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-proof -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install golemcloud/golem moonbit-proof --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-proof .gemini/skills/moonbit-proof && 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-proof" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-proof into .gemini/skills/moonbit-proof/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-proof", 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-proofInstalls 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-proof -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-proof .github/skills/moonbit-proof && 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-proof" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-proof into .github/skills/moonbit-proof/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-proof", 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-proof -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-proof --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-proof .opencode/skills/moonbit-proof && 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-proof" agent skill from https://github.com/golemcloud/golem/tree/main/.agents/skills/moonbit-proof into .opencode/skills/moonbit-proof/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "moonbit-proof", 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-proof- GitHub stars
- 1.5k
- Token cost
- ~3.8k tokens
- SKILL.md length
- 1,528 words
- Files
- 2
- Skills in repo
- 289
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A skill your agent uses when writing or refactoring proof-carrying code in MoonBit, especially for Why3-backed specifications, abstraction functions, representation invariants, proof assertions…
- Works in 11 steps: Pick the Right Abstract Model → Keep the Invariant Small → Use Named Postconditions → …
- Refactoring proof-carrying code in MoonBit
- SKILL.md covers Goal, Naming, Default Structure and Recommended Workflow, plus 15 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Moonbit Proof is an agent skill from golemcloud/golem. Use when writing or refactoring proof-carrying code in MoonBit, especially for Why3-backed specifications, abstraction functions, representation invariants, proof assertions, recursive verified data structures, or reducing trusted proof bridges.
Its SKILL.md is about 3.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).
It sits in Development, covering Refactoring. 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
- Refactoring proof-carrying code in MoonBit
- Especially for Why3-backed specifications
- Abstraction functions
- Representation invariants
Example prompts
- “/moonbit-proof”
Workflow steps
11 steps, taken from the step headings in SKILL.md.
- Pick the Right Abstract Model
- Keep the Invariant Small
- Use Named Postconditions
- Put the Math in .mbtp
- Guide the Solver in .mbt
- Write Loop Invariants Early
- Verify the Natural API Surface
- Use Structural Proof Shape for Recursive Code
- For Packed or Indexed Representations, Prove Concrete Updates Before Semantic Meaning
- Keep Shared Shim Packages Small
- Treat Trust as Temporary
What it can do on your machine
Read from SKILL.md and the folder at commit 2dea6b9. 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 (its code samples are moonbit).
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 Proof loads about 3.8k tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 1,528 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 1,528 words (~3,776 tokens).
“Use this skill when the task is to write, extend, or debug verified MoonBit code.”
- name
- moonbit-proof
Files
SKILL.md and 1 other file in .agents/skills/moonbit-proof of golemcloud/golem.
- SKILL.md
- agents/openai.yaml
Open the folder on GitHubat commit 2dea6b9
Compare with similar skills
Moonbit Proof 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 Proof this skillgolemcloud/golem | 1.5k | — | ~3.8k | Automated safety check: Pass | Custom licence | |
| Guidelinesakash-network/node | 1.1k | 22 repos | ~577 | Automated safety check: Pass | MIT | |
| Component Refactoringlangflow-ai/langflow | 156k | — | ~3.5k | Automated safety check: Pass | MIT | |
| Migrate Core Code to Submodulestinyhumansai/openhuman | 41k | — | ~2.6k | Automated safety check: Pass | GPL-3.0 | |
| ast-grep Structural Searchcode-yeongyu/oh-my-openagent | 70k | — | ~3.3k | Automated safety check: Pass | MIT | |
| Systematic Code Refactoringluongnv89/claude-howto | 42k | — | ~3k | Automated safety check: Pass | MIT |
Similar skills
Component Refactoring
langflow-ai/langflow
Refactor high-complexity React components in Langflow frontend.
Migrate Core Code to Submodules
tinyhumansai/openhuman
Plans and carries out moving non-host-specific code and its tests from the OpenHuman core into vendored tiny submodule libraries, then releases the submodule and re-pins the host.
ast-grep Structural Search
code-yeongyu/oh-my-openagent
Searches and rewrites code by syntax-tree shape across 25 languages with ast-grep, for codemods, structural queries and YAML lint rules, using a Python wrapper script.
Systematic Code Refactoring
luongnv89/claude-howto
Guides refactoring in phases based on Martin Fowler's method: research, test coverage check, planning and small tested steps, with your approval at each phase.
Codex
skills-directory/skill-codex
A skill your agent uses when the user asks to run Codex CLI (codex exec, codex resume) or references OpenAI Codex for code analysis, refactoring, or automated editing
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Related
Categories
Questions about Moonbit Proof
What does Moonbit Proof do?
A skill your agent uses when writing or refactoring proof-carrying code in MoonBit, especially for Why3-backed specifications, abstraction functions, representation invariants, proof assertions…. Moonbit Proof is an agent skill from golemcloud/golem. Use when writing or refactoring proof-carrying code in MoonBit, especially for Why3-backed specifications, abstraction functions, representation invariants, proof assertions, recursive verified data structures, or reducing trusted proof bridges.
When should I use Moonbit Proof?
Moonbit Proof fits situations like: refactoring proof-carrying code in MoonBit; especially for Why3-backed specifications; abstraction functions; representation invariants.
How do I install Moonbit Proof in Claude Code?
Run `npx skills add golemcloud/golem --skill moonbit-proof -a claude-code`. Or copy the skill folder (.agents/skills/moonbit-proof in golemcloud/golem) into .claude/skills/moonbit-proof in your project. Claude Code loads it when a task matches its description.
How do I install Moonbit Proof in Codex?
Run `npx skills add golemcloud/golem --skill moonbit-proof -a codex`. Or copy the skill folder (.agents/skills/moonbit-proof in golemcloud/golem) into .agents/skills/moonbit-proof in your project. Codex loads it when a task matches its description.
Can I use Moonbit Proof 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-proof -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-proof, .gemini/skills/moonbit-proof, .github/skills/moonbit-proof and .opencode/skills/moonbit-proof in your project.
What does Moonbit Proof need to run?
SKILL.md names no scripts, command-line tools or credentials: Moonbit Proof is instructions for the agent only.
Does Moonbit Proof 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 Proof 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 Moonbit Proof use?
Moonbit Proof 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 Proof use?
About 3.8k tokens (SKILL.md is roughly 15k 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 Moonbit Proof?
Skills that share tags, products or a category with Moonbit Proof: Guidelines (akash-network/node, 1.1k stars), Component Refactoring (langflow-ai/langflow, 156k stars), Migrate Core Code to Submodules (tinyhumansai/openhuman, 41k stars) and ast-grep Structural Search (code-yeongyu/oh-my-openagent, 70k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Moonbit Proof?
golemcloud (a GitHub organization) maintains it in golemcloud/golem, which has 1,506 GitHub stars. The repository holds 289 skills in this directory. The repository was last updated on October 7, 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.