eslint

eslint is a skill for Claude Code, Codex from ashish7802/awesome-api-skills. It costs 0 tokens per session (658 once invoked), scanned A, original, MIT.

A guide to ESLint, a tool that examines JavaScript code and reports problems before the code runs.

In plain words
What is it for?
Use it to create project rules, check JavaScript and TypeScript files, and combine code checks with formatting tools such as Prettier.
Why use it?
It catches common code issues automatically and gives teams consistent rules for reviewing changes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to create project rules, check JavaScript and TypeScript files, and combine code checks with formatting tools such as Prettier.

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Install with agentmods
npx agentmods add skills/ashish7802/awesome-api-skills/eslint
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 ashish7802/awesome-api-skills --skill eslint
Clone the repo
git clone --depth 1 https://github.com/ashish7802/awesome-api-skills

Made for: Claude Code, Codex.

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.

agentmods badge for eslint

README.md
[![agentmods](https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/eslint/github.svg)](https://agentmods.dev/skills/ashish7802/awesome-api-skills/eslint)
Your own site
<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/eslint"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/eslint/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.

agentmods 80×15 button for eslint

Your own site · 80×15
<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/eslint"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/eslint.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 658 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00658
Opus 5 $0.00000 $0.00329
Sonnet 5 $0.00000 $0.00132
Haiku 4.5 $0.00000 $0.00066

Measured 10d ago against content hash e0308f3027ff, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

eslint 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 10d 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/eslint/SKILL.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ESLint Skill

Find and fix problems in your JavaScript code.

Ecosystem Graph Preview

graph LR
  eslint["eslint"]:::core
  classDef core fill:#f9f,stroke:#333,stroke-width:4px;
  biome -- "replaces" --> eslint
  eslint -- "alternative to" --> biome
  eslint -- "works well with" --> prettier
  eslint -- "works well with" --> typescript
  prettier -- "works well with" --> eslint
  • biome (Score: 0.95) Why: Direct relationship, Both are Developer Tools, Shared ecosystem (javascript), Can deploy to any, Similar network profile
  • prettier (Score: 0.92) Why: Direct relationship, Both are Developer Tools, Shared ecosystem (javascript), Can deploy to any, Similar network profile
  • bullmq (Score: 0.35) Why: Both are Developer Tools, Shared ecosystem (javascript), Logical next step

Quick Start

ESLint statically analyzes your code to quickly find problems. It is highly extensible via plugins.

npm init @eslint/config@latest

Production Patterns

Flat Config

ESLint v9 exclusively uses the new Flat Config system (eslint.config.js). It drops the complex cascading .eslintrc files in favor of a single array of configuration objects.

Architecture & Scaling

AST Parsing

ESLint parses JavaScript into an Abstract Syntax Tree (AST) and evaluates rules against it. When using TypeScript, you must configure @typescript-eslint/parser to allow ESLint to understand TS-specific syntax.

Error Recovery

If linting becomes extremely slow, it is usually due to rules that require type information. Run type-aware linting only in CI, and disable those specific rules for your local IDE experience if the project is massive.

Security Notes

Use eslint-plugin-security to detect potential vulnerabilities like Regex Denial of Service (ReDoS) or eval() usage directly in your source code.

References

Read the full file on GitHub · 71 lines

Files

What ships with it

2 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.

  1. 10d ago First seen · 71 lines · 0 tokens per session scan A e0308f3027ff

Subscribe to this mod's changes

eslint is a skill published in the GitHub repository ashish7802/awesome-api-skills (13 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 658 tokens. 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 2026-08-30.