React18 String Refs
github/awesome-copilot
Provides exact migration patterns for React string refs (ref="name" + this.refs.name) to React.createRef() in class components.
Quick reference for Either type. An agent skill from sickn33/agentic-awesome-skills.
MITAuto-check passed
Install Fp Either Ref
$ npx skills add sickn33/agentic-awesome-skills --skill fp-either-ref -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sickn33/agentic-awesome-skills fp-either-ref --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/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/fp-either-ref .claude/skills/fp-either-ref && 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 "fp-either-ref" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/fp-either-ref into .claude/skills/fp-either-ref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fp-either-ref", 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/sickn33/agentic-awesome-skills/tree/main/skills/fp-either-refType 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 sickn33/agentic-awesome-skills --skill fp-either-ref -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sickn33/agentic-awesome-skills fp-either-ref --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/fp-either-ref .agents/skills/fp-either-ref && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "fp-either-ref" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/fp-either-ref into .agents/skills/fp-either-ref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fp-either-ref", 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 sickn33/agentic-awesome-skills --skill fp-either-ref -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sickn33/agentic-awesome-skills fp-either-ref --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/fp-either-ref .cursor/skills/fp-either-ref && 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 "fp-either-ref" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/fp-either-ref into .cursor/skills/fp-either-ref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fp-either-ref", 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/sickn33/agentic-awesome-skills.git --path skills/fp-either-ref--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 sickn33/agentic-awesome-skills --skill fp-either-ref -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sickn33/agentic-awesome-skills fp-either-ref --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/fp-either-ref .gemini/skills/fp-either-ref && 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 "fp-either-ref" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/fp-either-ref into .gemini/skills/fp-either-ref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fp-either-ref", 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 sickn33/agentic-awesome-skills fp-either-refInstalls 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 sickn33/agentic-awesome-skills --skill fp-either-ref -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/fp-either-ref .github/skills/fp-either-ref && 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 "fp-either-ref" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/fp-either-ref into .github/skills/fp-either-ref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fp-either-ref", 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 sickn33/agentic-awesome-skills --skill fp-either-ref -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sickn33/agentic-awesome-skills fp-either-ref --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/fp-either-ref .opencode/skills/fp-either-ref && 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 "fp-either-ref" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/fp-either-ref into .opencode/skills/fp-either-ref/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fp-either-ref", 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
fp-either-ref- GitHub stars
- 47k
- Used in
- 2 other repos
- Token cost
- ~655 tokens
- SKILL.md length
- 111 words
- Files
- 1
- Skills in repo
- 1,493
- Repo updated
- First seen
- Licence
- MIT
At a glance
Quick reference for Either type. An agent skill from sickn33/agentic-awesome-skills.
- User needs error handling
- SKILL.md covers When to Use, Create, Transform and Extract, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Operations that can fail with typed errors
What it does
Fp Either Ref is an agent skill from sickn33/agentic-awesome-skills. Quick reference for Either type. Use when user needs error handling, validation, or operations that can fail with typed errors.
Its SKILL.md is about 660 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: AAS Core is the local, agent-first control plane for complete catalog discovery, agent-owned selection, stack validation, and planning, backed by 2,400+ agentic skills. Includes… The licence is MIT.
When your agent uses it
- User needs error handling
- Operations that can fail with typed errors
Example prompts
- “/fp-either-ref”
What it can do on your machine
Read from SKILL.md and the folder at commit 680176d. 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 typescript).
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
Fp Either Ref loads about 655 tokens when it runs. Until then it costs about 35 tokens; SKILL.md has 111 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 sickn33/agentic-awesome-skills at commit 680176d, republished under its MIT licence (© sickn33). 111 words, ~655 tokens.
Download SKILL.mdSave it as
.claude/skills/fp-either-ref/SKILL.md (or your agent's skills folder).- name
- fp-either-ref
- description
- Quick reference for Either type. Use when user needs error handling, validation, or operations that can fail with typed errors.
- risk
- none
- source
- community
- date_added
- 2026-09-04
- version
- 1.0.0
- tags
- fp-ts, either, error-handling, validation, quick-reference
Either Quick Reference
Either = success or failure. Right(value) or Left(error).
When to Use
- You need a quick fp-ts reference for typed synchronous error handling.
- The task involves validation, fallible operations, or converting throwing code to
Either. - You want a compact cheat sheet rather than a long tutorial.
Create
import * as E from 'fp-ts/Either'
E.right(value) // Success
E.left(error) // Failure
E.fromNullable(err)(x) // null → Left(err), else Right(x)
E.tryCatch(fn, toError) // try/catch → EitherTransform
E.map(fn) // Transform Right value
E.mapLeft(fn) // Transform Left error
E.flatMap(fn) // Chain (fn returns Either)
E.filterOrElse(pred, toErr) // Right → Left if pred failsExtract
E.getOrElse(err => default) // Get Right or default
E.match(onLeft, onRight) // Pattern match
E.toUnion(either) // E | A (loses type info)Common Patterns
import { pipe } from 'fp-ts/function'
import * as E from 'fp-ts/Either'
// Validation
const validateEmail = (s: string): E.Either<string, string> =>
s.includes('@') ? E.right(s) : E.left('Invalid email')
// Chain validations (stops at first error)
pipe(
E.right({ email: 'test@example.com', age: 25 }),
E.flatMap(d => pipe(validateEmail(d.email), E.map(() => d))),
E.flatMap(d => d.age >= 18 ? E.right(d) : E.left('Must be 18+'))
)
// Convert throwing code
const parseJson = (s: string) => E.tryCatch(
() => JSON.parse(s),
(e) => `Parse error: ${e}`
)vs try/catch
// ❌ try/catch - errors not in types
try {
const data = JSON.parse(input)
process(data)
} catch (e) {
handleError(e)
}
// ✅ Either - errors explicit in types
pipe(
E.tryCatch(() => JSON.parse(input), String),
E.map(process),
E.match(handleError, identity)
)Use Either when error type matters and you want to chain operations.
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
© sickn33, MIT. 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 skills/fp-either-ref of sickn33/agentic-awesome-skills.
Open the folder on GitHubat commit 680176d
Used in 2 other repositories
We found 11 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Fp Either Ref 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 |
|---|---|---|---|---|---|---|
| Fp Either Ref this skillsickn33/agentic-awesome-skills | 47k | 2 repos | ~655 | Automated safety check: Pass | MIT | |
| React18 String Refsgithub/awesome-copilot | 40k | 1 repos | ~527 | Automated safety check: Pass | MIT | |
| Octopus Quicknyldn/claude-octopus | 4.2k | 1 repos | ~2.2k | Automated safety check: Pass | MIT | |
| GSD Quick Batchopen-gsd/gsd-core | 10k | — | ~1.4k | Automated safety check: Notes | MIT | |
| Quick Design SpecDonchitos/Claude-Code-Game-Studios | 26k | — | ~2.9k | Automated safety check: Pass | MIT | |
| Quicknotque/vexjoy-agent | 439 | — | ~1.9k | Automated safety check: Notes | MIT |
Similar skills
- Official
Octopus Quick
nyldn/claude-octopus
Quick execution for ad-hoc tasks without full workflow overhead — use for small, self-contained requests
GSD Quick Batch
open-gsd/gsd-core
Runs several small /gsd-quick tasks as one batch, with a single coordinator that plans them, dispatches workers per item and owns all shared writes and worktree merges.
Quick Design Spec
Donchitos/Claude-Code-Game-Studios
Writes a short design spec for small gameplay adjustments such as tuning, tweaks and minor additions, and redirects anything larger to a full design document.
Quick
notque/vexjoy-agent
Tracked lightweight execution with composable rigor flags: --trivial, --discuss, --research, --full.
Dep Refs
zai-org/ZCode
A skill your agent uses when needs to inspect TypeScript export references in the z-code workspace, list exports from a file, verify whether an export is unused before deletion, investigate who…
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Questions about Fp Either Ref
What does Fp Either Ref do?
Quick reference for Either type. An agent skill from sickn33/agentic-awesome-skills. Fp Either Ref is an agent skill from sickn33/agentic-awesome-skills. Quick reference for Either type.
When should I use Fp Either Ref?
Fp Either Ref fits situations like: user needs error handling; operations that can fail with typed errors.
How do I install Fp Either Ref in Claude Code?
Run `npx skills add sickn33/agentic-awesome-skills --skill fp-either-ref -a claude-code`. Or copy the skill folder (skills/fp-either-ref in sickn33/agentic-awesome-skills) into .claude/skills/fp-either-ref in your project. Claude Code loads it when a task matches its description.
How do I install Fp Either Ref in Codex?
Run `npx skills add sickn33/agentic-awesome-skills --skill fp-either-ref -a codex`. Or copy the skill folder (skills/fp-either-ref in sickn33/agentic-awesome-skills) into .agents/skills/fp-either-ref in your project. Codex loads it when a task matches its description.
Can I use Fp Either Ref 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 sickn33/agentic-awesome-skills --skill fp-either-ref -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fp-either-ref, .gemini/skills/fp-either-ref, .github/skills/fp-either-ref and .opencode/skills/fp-either-ref in your project.
What does Fp Either Ref need to run?
SKILL.md names no scripts, command-line tools or credentials: Fp Either Ref is instructions for the agent only.
Does Fp Either Ref 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 Fp Either Ref 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 Fp Either Ref use?
Fp Either Ref is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Fp Either Ref use?
About 655 tokens (SKILL.md is roughly 2.6k 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 Fp Either Ref?
Skills that share tags, products or a category with Fp Either Ref: React18 String Refs (github/awesome-copilot, 40k stars), Octopus Quick (nyldn/claude-octopus, 4.2k stars), GSD Quick Batch (open-gsd/gsd-core, 10k stars) and Quick Design Spec (Donchitos/Claude-Code-Game-Studios, 26k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Fp Either Ref?
sickn33 (a GitHub user) maintains it in sickn33/agentic-awesome-skills, which has 47,379 GitHub stars. The repository holds 1,493 skills in this directory. The repository was last updated on October 9, 2026.
Source: sickn33/agentic-awesome-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.