Agent skill

Rtk Query API

“RTK Query createApi best practices”

— description from SKILL.md by LedgerHQ

Install Rtk Query API

skills CLI

$ npx skills add LedgerHQ/ledger-live --skill rtk-query-api -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install LedgerHQ/ledger-live rtk-query-api --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/LedgerHQ/ledger-live.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/rtk-query-api .claude/skills/rtk-query-api && rm -rf skills-src

Use ~/.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/

Paste into Claude Code

Install the "rtk-query-api" agent skill from https://github.com/LedgerHQ/ledger-live/tree/develop/.agents/skills/rtk-query-api into .claude/skills/rtk-query-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rtk-query-api", 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

$skill-installer install https://github.com/LedgerHQ/ledger-live/tree/develop/.agents/skills/rtk-query-api

Type 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.

skills CLI

$ npx skills add LedgerHQ/ledger-live --skill rtk-query-api -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install LedgerHQ/ledger-live rtk-query-api --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/LedgerHQ/ledger-live.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/rtk-query-api .agents/skills/rtk-query-api && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "rtk-query-api" agent skill from https://github.com/LedgerHQ/ledger-live/tree/develop/.agents/skills/rtk-query-api into .agents/skills/rtk-query-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rtk-query-api", 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.

skills CLI

$ npx skills add LedgerHQ/ledger-live --skill rtk-query-api -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install LedgerHQ/ledger-live rtk-query-api --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/LedgerHQ/ledger-live.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/rtk-query-api .cursor/skills/rtk-query-api && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "rtk-query-api" agent skill from https://github.com/LedgerHQ/ledger-live/tree/develop/.agents/skills/rtk-query-api into .cursor/skills/rtk-query-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rtk-query-api", 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

$ gemini skills install https://github.com/LedgerHQ/ledger-live.git --path .agents/skills/rtk-query-api

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add LedgerHQ/ledger-live --skill rtk-query-api -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install LedgerHQ/ledger-live rtk-query-api --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/LedgerHQ/ledger-live.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/rtk-query-api .gemini/skills/rtk-query-api && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "rtk-query-api" agent skill from https://github.com/LedgerHQ/ledger-live/tree/develop/.agents/skills/rtk-query-api into .gemini/skills/rtk-query-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rtk-query-api", 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.

GitHub CLI

$ gh skill install LedgerHQ/ledger-live rtk-query-api

Installs 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).

skills CLI

$ npx skills add LedgerHQ/ledger-live --skill rtk-query-api -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/LedgerHQ/ledger-live.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/rtk-query-api .github/skills/rtk-query-api && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "rtk-query-api" agent skill from https://github.com/LedgerHQ/ledger-live/tree/develop/.agents/skills/rtk-query-api into .github/skills/rtk-query-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rtk-query-api", 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.

skills CLI

$ npx skills add LedgerHQ/ledger-live --skill rtk-query-api -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install LedgerHQ/ledger-live rtk-query-api --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/LedgerHQ/ledger-live.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/rtk-query-api .opencode/skills/rtk-query-api && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "rtk-query-api" agent skill from https://github.com/LedgerHQ/ledger-live/tree/develop/.agents/skills/rtk-query-api into .opencode/skills/rtk-query-api/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "rtk-query-api", 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: rtk-query-api
GitHub stars: 621
Token cost: ~1.6k tokens
SKILL.md length: 570 words
Files: 1
Skills in repo: 50
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

SKILL.md covers Structure, Splitting backend access from…, Endpoints and Caching & Tags, plus 3 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

About this skill

Rtk Query API is a skill in LedgerHQ/ledger-live (621 stars). Its SKILL.md is about 1.6k tokens. Licence: MIT.

What it can do on your machine

Read from SKILL.md and the folder at commit a3861a2. 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
Links to these hosts (documentation or services it may open):
- redux-toolkit.js.org
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

Rtk Query API loads about 1.6k tokens when it runs. Until then it costs about 12 tokens; SKILL.md has 570 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~12
When it runs · the whole SKILL.md, loaded when a task matches: ~1.6k

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 LedgerHQ/ledger-live at commit a3861a2, republished under its MIT licence (© LedgerHQ). 570 words, ~1,599 tokens.

Download SKILL.mdSave it as .claude/skills/rtk-query-api/SKILL.md (or your agent's skills folder).

name: rtk-query-api
description: RTK Query createApi best practices

RTK Query - createApi

Structure

One API slice per base URL / data source — never two createApi calls against the same backend
Export generated hooks alongside the API

typescript

// ✅ GOOD - state-manager/api.ts
import { createApi, fetchBaseQuery } from "@reduxjs/toolkit/query/react";
import { EntityTags } from "./types";

export const myApi = createApi({
  reducerPath: "myApi",
  baseQuery: fetchBaseQuery({ baseUrl: "/api" }),
  tagTypes: [EntityTags.Entity, EntityTags.Entities],
  endpoints: (build) => ({
    getEntity: build.query<Entity, string>({
      query: (id) => `entities/${id}`,
      providesTags: [EntityTags.Entity],
    }),
  }),
});

export const { useGetEntityQuery } = myApi;

Define tags as enums in state-manager/types.ts:

typescript

export enum EntityTags {
  Entity = "Entity",
  Entities = "Entities",
}

Splitting backend access from use case

In domain/api/, this is the default — not something you reach for once a second use case appears. Always split reaching the backend from what you ask it for:

Half	Owner	Contains
Reaching a backend	`@shared/api-services` — one dir per backend	Base URL, base query, retry, `reducerPath`, `extraArgument` contract
What you ask it for	`@domain/api-<name>`	Endpoints, wire schemas, transforms, cache tags, hooks

Doing it upfront costs nothing and means the second use case is a one-line addition rather than a migration. Two createApi calls against one backend would give you two store slices, two caches and two middlewares for one service.

The shared half declares an empty api. The use-case half adds to it with injectEndpoints for endpoints and enhanceEndpoints({ addTagTypes }) for tags. Both mutate and return the same api object, so one reducer, one middleware and one cache serve every use case.

There are no exceptions. If a backend's base query currently needs use-case knowledge — mock handlers keyed by endpoint URL, endpoint-name lookups, response types from its own wire schemas — that is a problem to fix in the base query, not a reason to keep a second createApi.

typescript

// ✅ GOOD - the service api: base query + config. No endpoints, no tags.
export const myServiceApi = createApi({
  reducerPath: "myServiceApi",
  baseQuery: myServiceBaseQuery,
  tagTypes: [],
  endpoints: () => ({}),
});

typescript

// ✅ GOOD - a use case adds its own tags, then its endpoints
export const FIRST_USE_CASE_TAGS = ["Entity"] as const;

export const firstUseCaseApi = myServiceApi
  .enhanceEndpoints({ addTagTypes: FIRST_USE_CASE_TAGS })
  .injectEndpoints({
    endpoints: build => ({
      getEntity: build.query<Entity, string>({
        query: id => `entities/${id}`,
        providesTags: [...FIRST_USE_CASE_TAGS],
      }),
    }),
  });

export const { useGetEntityQuery } = firstUseCaseApi;

Cache tags belong to the use case, not the shared api. injectEndpoints does not accept tagTypes, which makes it tempting to declare every tag upfront in the shared file — don't. enhanceEndpoints({ addTagTypes }) widens the tag union in place, so a tag stays next to the endpoints that provide it and adding a use case never means editing a shared file.
Register the service api; call endpoints on the use case. Only the injected reference is typed with the endpoints — injectEndpoints cannot retype the original.
Injection is a module-level side effect. An endpoint exists only once its use-case module has been evaluated as a value import; a type-only import will not trigger it. Never import an api from @shared/api-services in order to call endpoints on it.
A tag-less api has a narrower state type. The registered api declares no tags, so a helper typed on an injected reference (whose use case added some) will not accept an app's State. Type such helpers on the service api.
overrideExisting defaults to false — injecting an endpoint name that already exists is silently ignored unless you opt in.

Show full SKILL.md (162 more words)Show less

Endpoints

Use build.query for GET requests
Use build.mutation for POST/PUT/DELETE
Type both response and argument: build.query<ResponseType, ArgType>
Use void for no arguments: build.query<Data[], void>

Caching & Tags

Define tags as enums in types.ts
Use providesTags on queries for cache invalidation
Use invalidatesTags on mutations to trigger refetch
Use keepUnusedDataFor for custom cache duration

typescript

endpoints: (build) => ({
  getItems: build.query<Item[], void>({
    query: () => "items",
    providesTags: [ItemTags.Items],
    keepUnusedDataFor: 60, // seconds
  }),
  addItem: build.mutation<Item, Partial<Item>>({
    query: (body) => ({ url: "items", method: "POST", body }),
    invalidatesTags: [ItemTags.Items],
  }),
}),

Transform Responses

Use transformResponse to reshape API data
Use transformErrorResponse for custom error handling

typescript

getItems: build.query<Item[], void>({
  query: () => "items",
  transformResponse: (response: ApiResponse) => response.data.items,
}),

Error Handling

Always catch errors in custom baseQuery or queryFn
Return { data } on success, { error } on failure

typescript

// ✅ GOOD - errors are caught and returned
queryFn: async (arg) => {
  try {
    const data = await fetchData(arg);
    return { data };
  } catch (error) {
    return { error: { status: "CUSTOM_ERROR", data: error } };
  }
},

Registration

Register APIs in reducers/rtkQueryApi.ts, keyed by reducerPath. For a shared backend, register the service api — its endpoints arrive via the use-case packages the view-models import. The registry then reads as a list of the backends the app talks to:

typescript

const APIs = {
  [myApi.reducerPath]: myApi,
  [myServiceApi.reducerPath]: myServiceApi,
};

Two entries whose reducerPath resolves to the same string is a compile error (TS1117: An object literal cannot have multiple properties with the same name), even for computed properties — which is what catches an accidental double-registration of one backend.

Files

Just SKILL.md in .agents/skills/rtk-query-api of LedgerHQ/ledger-live.

Open the folder on GitHubat commit a3861a2

Compare with similar skills

Rtk Query API 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.

Rtk Query API compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Rtk Query API this skillLedgerHQ/ledger-live	621	—	~1.6k	Automated safety check: Pass	MIT	today
React State Managementinvolvex/youtube-music-cli	456	12 repos	~3k	Automated safety check: Pass	MIT	yesterday
Frontendredis/RedisInsight	8.9k	—	~3.2k	Automated safety check: Pass	Custom licence	3 days ago
Reactvalkey-io/valkey-admin	148	—	~766	Automated safety check: Pass	Apache-2.0	2 days ago
Nekocap Redux Featurenopol10/nekocap	105	—	~939	Automated safety check: Pass	GPL-3.0	4 days ago
React ExpertJeffallan/claude-skills	12k	—	~1.4k	Automated safety check: Pass	MIT	4 days ago

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Questions about Rtk Query API

How do I install Rtk Query API in Claude Code?

Run `npx skills add LedgerHQ/ledger-live --skill rtk-query-api -a claude-code`. Or copy the skill folder (.agents/skills/rtk-query-api in LedgerHQ/ledger-live) into .claude/skills/rtk-query-api in your project. Claude Code loads it when a task matches its description.

How do I install Rtk Query API in Codex?

Run `npx skills add LedgerHQ/ledger-live --skill rtk-query-api -a codex`. Or copy the skill folder (.agents/skills/rtk-query-api in LedgerHQ/ledger-live) into .agents/skills/rtk-query-api in your project. Codex loads it when a task matches its description.

Can I use Rtk Query API 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 LedgerHQ/ledger-live --skill rtk-query-api -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/rtk-query-api, .gemini/skills/rtk-query-api, .github/skills/rtk-query-api and .opencode/skills/rtk-query-api in your project.

What does Rtk Query API need to run?

SKILL.md names no scripts, command-line tools or credentials: Rtk Query API is instructions for the agent only.

Does Rtk Query API access the network?

SKILL.md names 1 domain. As links in the text: redux-toolkit.js.org. This is read from the text; nothing was executed.

Is Rtk Query API 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 Rtk Query API use?

Rtk Query API 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 Rtk Query API use?

About 1.6k tokens (SKILL.md is roughly 6.4k 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 Rtk Query API?

Skills that share tags, products or a category with Rtk Query API: React State Management (involvex/youtube-music-cli, 456 stars), Frontend (redis/RedisInsight, 8.9k stars), React (valkey-io/valkey-admin, 148 stars) and Nekocap Redux Feature (nopol10/nekocap, 105 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Rtk Query API?

LedgerHQ (a GitHub organization) maintains it in LedgerHQ/ledger-live, which has 621 GitHub stars. The repository holds 50 skills in this directory. The repository was last updated on October 7, 2026.

Source: LedgerHQ/ledger-live on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Rtk Query API

Install Rtk Query API

Facts

At a glance

About this skill

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

RTK Query - createApi

Structure

Splitting backend access from use case

Endpoints

Caching & Tags

Transform Responses

Error Handling

Registration

Files

Compare with similar skills

Similar skills

React State Management

Frontend

React

Nekocap Redux Feature

React Expert

Sentry React SDK

More from LedgerHQ/ledger-live

Impacting PRs

Cloud Sync Module

Codeownership

Coin Families Contract

Data Layer Advanced

Debug Rn Native Crash

Questions about Rtk Query API

Install Rtk Query API

Facts

At a glance

About this skill

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

RTK Query - createApi

Structure

Splitting backend access from use case

Endpoints

Caching & Tags

Transform Responses

Error Handling

Registration

Files

Compare with similar skills

Similar skills

More from LedgerHQ/ledger-live

Related

Questions about Rtk Query API