What is tanstack-pacer?

A React toolkit for controlling when functions run, using techniques such as waiting for typing to stop, limiting repeated calls, queuing work, or grouping updates.

Use it for search fields, scroll handlers, API rate limits, task queues, and bulk operations with controlled timing.

It helps reduce unnecessary API requests, event-handler work, and bursts of tasks that can slow an application or exceed a service limit.

tanstack-pacer — Skill for Claude Code and Codex by fellipeutaka/leon

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add fellipeutaka/leon --skill tanstack-pacer

Clone the repo

git clone --depth 1 https://github.com/fellipeutaka/leon

Made for: Claude Code, Codex.

Or install frontend, the plugin that ships this one along with the rest of its 35 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/fellipeutaka/leon/tanstack-pacer/github.svg)](https://agentmods.dev/skills/fellipeutaka/leon/tanstack-pacer)

Your own site

<a href="https://agentmods.dev/skills/fellipeutaka/leon/tanstack-pacer"><img src="https://agentmods.dev/badge/skills/fellipeutaka/leon/tanstack-pacer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/fellipeutaka/leon/tanstack-pacer"><img src="https://agentmods.dev/badge/skills/fellipeutaka/leon/tanstack-pacer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,515 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00062	$0.01515
Opus 5.5	$0.00025	$0.00606
Sonnet 5.5	$0.00012	$0.00303
Haiku 4.5	$0.00006	$0.00152

Measured 2mo ago against content hash 79c701f3ed62, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tanstack-pacer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/tanstack-pacer/SKILL.md · 167 lines

How it starts

The opening of the file, as written. The whole thing — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TanStack Pacer

Version: @tanstack/react-pacer@latest Requires: React 16.8+, TypeScript recommended

Quick Setup

npm install @tanstack/react-pacer

import { useDebouncedCallback } from '@tanstack/react-pacer'

function SearchInput() {
  const debouncedSearch = useDebouncedCallback(
    (query: string) => fetchResults(query),
    { wait: 300 },
  )

  return <input onChange={(e) => debouncedSearch(e.target.value)} />
}

4 Hook Variants Per Utility

Each utility (Debouncer, Throttler, RateLimiter, Queuer, Batcher) provides 4 React hooks:

Hook	Returns	Use Case
`use[Utility]`	Instance	Full control, custom state subscriptions
`use[Utility]Callback`	Wrapped function	Simple event handler wrapping
`use[Utility]State`	`[value, setValue, instance]`	Debounced/throttled React state
`use[Utility]Value`	`[derivedValue, instance]`	Read-only derived value from props/state

PacerProvider (Optional)

import { PacerProvider } from '@tanstack/react-pacer'

<PacerProvider
  defaultOptions={{
    debouncer: { wait: 300 },
    throttler: { wait: 200 },
  }}
>
  <App />
</PacerProvider>

Devtools

npm install -D @tanstack/react-devtools @tanstack/react-pacer-devtools

import { TanStackDevtools } from '@tanstack/react-devtools'
import { pacerDevtoolsPlugin } from '@tanstack/react-pacer-devtools'

<TanStackDevtools plugins={[pacerDevtoolsPlugin()]} />

Utilities must have a key option to appear in devtools.

Rule Categories

Priority	Category	Rule File	Impact
CRITICAL	Hook Selection	`rules/hook-selection.md`	Correct hook choice per use case
CRITICAL	Debouncing	`rules/deb-debouncing.md`	Prevents wasted API calls and flickering UI
HIGH	Throttling	`rules/thr-throttling.md`	Smooth, evenly-spaced execution
HIGH	State & Reactivity	`rules/state-reactivity.md`	Prevents unnecessary re-renders
HIGH	Async Patterns	`rules/async-patterns.md`	Correct async execution with retry, abort, error handling
MEDIUM	Rate Limiting	`rules/rl-rate-limiting.md`	Enforces execution budgets
MEDIUM	Queuing	`rules/que-queuing.md`	Lossless ordered/priority task processing
MEDIUM	Batching	`rules/bat-batching.md`	Groups operations for bulk processing
LOW	Configuration	`rules/config-options.md`	Dynamic options, providers, shared config
LOW	Devtools	`rules/devtools.md`	Debugging and monitoring utilities

Read the full file on GitHub · 167 lines

Files

What ships with it

11 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 167 lines · 62 tokens per session scan A 79c701f3ed62

Subscribe to this mod's changes

tanstack-pacer is a skill published in the GitHub repository fellipeutaka/leon (5 stars, last pushed yesterday), licensed MIT. It adds 62 tokens to every session and 1,515 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Frontend React

tanstack-pacer next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
tanstack-pacerfellipeutaka/leon	Skill	5	yesterday	MIT	A	62	Claude Code, Codex
build-ghost-appTryGhost/Ghost	Skill	56k	yesterday	MIT	A	44	Claude Code, Codex
chakra-ui-builderchakra-ui/chakra-ui	Skill	41k	yesterday	MIT	A	214	Claude Code, Codex
material-ui-tailwindmui/material-ui	Skill	99k	yesterday	MIT	A	67	Claude Code, Codex
fuzzy-rankingTanStack/table	Skill	29k	4d ago	MIT	A	62	Claude Code, Codex
r3f-best-practiceszebbern/claude-code-guide	Skill	4.7k	3d ago	MIT	A	74	Claude Code, Codex
git-safetytamagui/tamagui	Skill	14k	today	MIT	A	0	Claude Code