Guidelines
akash-network/node
Behavioral guidelines to reduce common LLM coding mistakes. An agent skill from akash-network/node.
Use the neverthrow Result / ResultAsync pattern instead of try/catch for recoverable failures.
Install Fantasia Neverthrow
$ npx skills add vishiri/fantasia-archive --skill fantasia-neverthrow -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install vishiri/fantasia-archive fantasia-neverthrow --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/vishiri/fantasia-archive.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.cursor/skills/fantasia-neverthrow .claude/skills/fantasia-neverthrow && 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 "fantasia-neverthrow" agent skill from https://github.com/vishiri/fantasia-archive/tree/master/.cursor/skills/fantasia-neverthrow into .claude/skills/fantasia-neverthrow/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fantasia-neverthrow", 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/vishiri/fantasia-archive/tree/master/.cursor/skills/fantasia-neverthrowType 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 vishiri/fantasia-archive --skill fantasia-neverthrow -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install vishiri/fantasia-archive fantasia-neverthrow --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vishiri/fantasia-archive.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.cursor/skills/fantasia-neverthrow .agents/skills/fantasia-neverthrow && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "fantasia-neverthrow" agent skill from https://github.com/vishiri/fantasia-archive/tree/master/.cursor/skills/fantasia-neverthrow into .agents/skills/fantasia-neverthrow/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fantasia-neverthrow", 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 vishiri/fantasia-archive --skill fantasia-neverthrow -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install vishiri/fantasia-archive fantasia-neverthrow --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vishiri/fantasia-archive.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.cursor/skills/fantasia-neverthrow .cursor/skills/fantasia-neverthrow && 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 "fantasia-neverthrow" agent skill from https://github.com/vishiri/fantasia-archive/tree/master/.cursor/skills/fantasia-neverthrow into .cursor/skills/fantasia-neverthrow/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fantasia-neverthrow", 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/vishiri/fantasia-archive.git --path .cursor/skills/fantasia-neverthrow--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 vishiri/fantasia-archive --skill fantasia-neverthrow -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install vishiri/fantasia-archive fantasia-neverthrow --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vishiri/fantasia-archive.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.cursor/skills/fantasia-neverthrow .gemini/skills/fantasia-neverthrow && 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 "fantasia-neverthrow" agent skill from https://github.com/vishiri/fantasia-archive/tree/master/.cursor/skills/fantasia-neverthrow into .gemini/skills/fantasia-neverthrow/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fantasia-neverthrow", 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 vishiri/fantasia-archive fantasia-neverthrowInstalls 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 vishiri/fantasia-archive --skill fantasia-neverthrow -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/vishiri/fantasia-archive.git skills-src && mkdir -p .github/skills && cp -r skills-src/.cursor/skills/fantasia-neverthrow .github/skills/fantasia-neverthrow && 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 "fantasia-neverthrow" agent skill from https://github.com/vishiri/fantasia-archive/tree/master/.cursor/skills/fantasia-neverthrow into .github/skills/fantasia-neverthrow/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fantasia-neverthrow", 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 vishiri/fantasia-archive --skill fantasia-neverthrow -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install vishiri/fantasia-archive fantasia-neverthrow --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vishiri/fantasia-archive.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.cursor/skills/fantasia-neverthrow .opencode/skills/fantasia-neverthrow && 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 "fantasia-neverthrow" agent skill from https://github.com/vishiri/fantasia-archive/tree/master/.cursor/skills/fantasia-neverthrow into .opencode/skills/fantasia-neverthrow/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fantasia-neverthrow", 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
fantasia-neverthrow- GitHub stars
- 409
- Token cost
- ~339 tokens
- SKILL.md length
- 90 words
- Files
- 1
- Skills in repo
- 35
- Repo updated
- First seen
- Licence
- GPL-3.0
At a glance
Use the neverthrow Result / ResultAsync pattern instead of try/catch for recoverable failures.
- Tasks that involve Refactoring
- SKILL.md covers When to follow, Core API (Neverthrow v8), Preload exclusion and Links
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Fantasia Neverthrow is an agent skill from vishiri/fantasia-archive. Use the neverthrow Result / ResultAsync pattern instead of try/catch for recoverable failures. Apply when touching error paths, IPC wrappers, parsers, or refactors around thrown errors.
Its SKILL.md is about 340 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Refactoring. The repository describes itself as: A world-builder's best friend! The licence is GPL-3.0.
When your agent uses it
- Tasks that involve Refactoring
Example prompts
- “/fantasia-neverthrow”
What it can do on your machine
Read from SKILL.md and the folder at commit 26d4648. 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
Links to these hosts (documentation or services it may open):
npmjs.com
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
Fantasia Neverthrow loads about 339 tokens when it runs. Until then it costs about 51 tokens; SKILL.md has 90 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
The full file from vishiri/fantasia-archive at commit 26d4648, republished under its GPL-3.0 licence (© vishiri). 90 words, ~339 tokens.
Download SKILL.mdSave it as
.claude/skills/fantasia-neverthrow/SKILL.md (or your agent's skills folder).- name
- fantasia-neverthrow
- description
- Use the neverthrow Result / ResultAsync pattern instead of try/catch for recoverable failures. Apply when touching error paths, IPC wrappers, parsers, or refactors around thrown errors.
Neverthrow error handling
When to follow
- Anticipated failures: IPC, parse edge cases, cancellation, clipboard, optional APIs
- Refactoring legacy
try/catchor swallowed.catch
See neverthrow.mdc.
Core API (Neverthrow v8)
ok(value),err(error)Result.fromThrowable(fn, mapError)ResultAsync.fromPromise(promise, mapError);fromSafePromisewhen rejection unexpectedmatch,unwrapOr,map,mapErr,andThen,orElsesafeTry: generatoryield* resultfor sequential steps
Prefer finally on Promise chains for cleanup-only side effects.
Preload exclusion
src-electron/contentBridgeAPIs/** — sandboxed preload bundle. No neverthrow import. Use Promise.then/.catch, URL.canParse, early returns. src-electron/shared/** reachable from preload: same rule. Renderer, main, helpers/ still prefer Result / ResultAsync.
Links
© vishiri, GPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .cursor/skills/fantasia-neverthrow of vishiri/fantasia-archive.
Open the folder on GitHubat commit 26d4648
Compare with similar skills
Fantasia Neverthrow 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 |
|---|---|---|---|---|---|---|
| Fantasia Neverthrow this skillvishiri/fantasia-archive | 409 | — | ~339 | Automated safety check: Pass | GPL-3.0 | |
| Guidelinesakash-network/node | 1.1k | 20 repos | ~577 | Automated safety check: Pass | MIT | |
| Migrate Core Code to Submodulestinyhumansai/openhuman | 42k | — | ~2.6k | Automated safety check: Pass | GPL-3.0 | |
| Component Refactoringlangflow-ai/langflow | 155k | — | ~3.5k | Automated safety check: Pass | MIT | |
| Ponytail Lazy Developer ModeDietrichGebert/ponytail | 160k | 1 repos | ~873 | Automated safety check: Pass | MIT | |
| ast-grep Structural Searchcode-yeongyu/oh-my-openagent | 70k | — | ~3.3k | Automated safety check: Pass | MIT |
Similar skills
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.
Component Refactoring
langflow-ai/langflow
Refactor high-complexity React components in Langflow frontend.
Ponytail Lazy Developer Mode
DietrichGebert/ponytail
Makes the agent pick the laziest solution that works: skip unneeded work, reuse what exists, prefer the standard library and platform features, and keep diffs small.
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.
More from vishiri/fantasia-archive
All 35 skills in this repoCaveman Commit
vishiri/fantasia-archive
Ultra-compressed commit message generator. An agent skill from vishiri/fantasia-archive.
Caveman Review
vishiri/fantasia-archive
Ultra-compressed code review comments. An agent skill from vishiri/fantasia-archive.
Caveman Compress
vishiri/fantasia-archive
Compress natural language memory files (CLAUDE.md, todos, preferences) into caveman format to save input tokens.
Cavecrew
vishiri/fantasia-archive
Decision guide for delegating to caveman-style subagents. An agent skill from vishiri/fantasia-archive.
Caveman Help
vishiri/fantasia-archive
Quick-reference card for all caveman modes, skills, and commands.
Fantasia Context Menu Dividers
vishiri/fantasia-archive
Context menu divider policy: full primary-bright group separators vs low-opacity separatorAlt between consecutive items in the same group.
Related
Categories
Questions about Fantasia Neverthrow
What does Fantasia Neverthrow do?
Use the neverthrow Result / ResultAsync pattern instead of try/catch for recoverable failures. Fantasia Neverthrow is an agent skill from vishiri/fantasia-archive. Use the neverthrow Result / ResultAsync pattern instead of try/catch for recoverable failures.
When should I use Fantasia Neverthrow?
Fantasia Neverthrow fits situations like: tasks that involve Refactoring.
How do I install Fantasia Neverthrow in Claude Code?
Run `npx skills add vishiri/fantasia-archive --skill fantasia-neverthrow -a claude-code`. Or copy the skill folder (.cursor/skills/fantasia-neverthrow in vishiri/fantasia-archive) into .claude/skills/fantasia-neverthrow in your project. Claude Code loads it when a task matches its description.
How do I install Fantasia Neverthrow in Codex?
Run `npx skills add vishiri/fantasia-archive --skill fantasia-neverthrow -a codex`. Or copy the skill folder (.cursor/skills/fantasia-neverthrow in vishiri/fantasia-archive) into .agents/skills/fantasia-neverthrow in your project. Codex loads it when a task matches its description.
Can I use Fantasia Neverthrow 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 vishiri/fantasia-archive --skill fantasia-neverthrow -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fantasia-neverthrow, .gemini/skills/fantasia-neverthrow, .github/skills/fantasia-neverthrow and .opencode/skills/fantasia-neverthrow in your project.
What does Fantasia Neverthrow need to run?
SKILL.md names no scripts, command-line tools or credentials: Fantasia Neverthrow is instructions for the agent only.
Does Fantasia Neverthrow access the network?
SKILL.md names 1 domain. As links in the text: npmjs.com. This is read from the text; nothing was executed.
Is Fantasia Neverthrow 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 Fantasia Neverthrow use?
Fantasia Neverthrow is published under the GPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Fantasia Neverthrow use?
About 339 tokens (SKILL.md is roughly 1.4k 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 Fantasia Neverthrow?
Skills that share tags, products or a category with Fantasia Neverthrow: Guidelines (akash-network/node, 1.1k stars), Migrate Core Code to Submodules (tinyhumansai/openhuman, 42k stars), Component Refactoring (langflow-ai/langflow, 155k stars) and Ponytail Lazy Developer Mode (DietrichGebert/ponytail, 160k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Fantasia Neverthrow?
vishiri (a GitHub user) maintains it in vishiri/fantasia-archive, which has 409 GitHub stars. The repository holds 35 skills in this directory. The repository was last updated on October 7, 2026.
Source: vishiri/fantasia-archive on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.