Eslint Plugin Custom Rule

Organization

coinbase

eslint-plugin-custom-rule

USE THIS when asked to create a new eslint plugin rule for the eslint-plugin-cds package

Overview

Publisher	coinbase
Repository	`cds`
Skill name	`eslint-plugin-custom-rule`
Stars	506
Forks	114
Bundled files	Instructions only
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
Self-contained
Everything the model needs lives in the instructions — no extra files to sync.
Open source
Published by coinbase on GitHub. Read the source before you install it.

Installation

Install the Eslint Plugin Custom Rule AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/coinbase/cds/tree/master/.claude/skills/eslint-plugin-custom-rule
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/coinbase/cds.git /tmp/cds
mkdir -p .claude/skills
cp -r /tmp/cds/.claude/skills/eslint-plugin-custom-rule .claude/skills/eslint-plugin-custom-rule

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Eslint Plugin Custom Rule in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Eslint Plugin Custom Rule on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Eslint Plugin Custom Rule is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Writing new rules

Process

When asked to create a new custom rule for the package, follow these steps in order:

Run the scaffold-new-rule.mjs script found at packages/eslint-plugin-cds/scripts/scaffold-new-rule.mjs. The script should be used every time a new rule is created. This script will ensure that the same format is used for all custom rules created.
Ask the user what the custom rule should do. If the user doesn't provide enough context in the prompt, ask for clarification or follow up. Do not make assumptions about how a custom rule is meant to behave or what guideline it's supposed to enforce. After gathering the needed context, ask the user which package(s) the rule should be applied to.
Once you have all the needed context, ask the user to provide at least one valid and one invalid example demonstrating when the custom rule is being followed or not. This will help you to write tests for the custom rule in a future step. Similar to step 2, if the provided examples do not give you enough context to understand the difference between a valid versus invalid example, ask the user for clarification. Do not proceed until the user has provided at least one valid and one invalid example and you have enough needed context to understand a valid and invalid example.
Based on the user's provided context, fill in the rule file generated under the src/rules directory. The main section you should fill out is the create() function key that's in the rule object. You can refer to packages/eslint-plugin-cds/src/rules/custom-rule.ts for more documentation on how custom rules are formatted and information to enter. Custom rules should use the AST visitor methods to determine when rules have been violated and should report warnings in the linter. Custom rules should also verify the packages being imported before performing AST parsing. If a file doesn't import a package specified in step 2, do not report an error in the custom rule. Most custom rules already do this. As an example, you can refer to the ImportDeclaration() function in the no-v7-imports rule found here: packages/eslint-plugin-cds/src/rules/no-v7-imports.ts. The rule only reports an error when one of the CDS_PACKAGES packages is used,
Using the context from step 3, write in valid and invalid test cases for the test file generated from the scaffold-new-rule.mjs script. The valid and invalid examples provided in step 3 should be included. Based off those examples and the rule criteria provided in step 2, you can add additional valid or invalid examples.

Directory placement

Custom rules should always be placed in the packages/eslint-plugin-cds/src/rules directory. Tests for each custom rule should be placed in the packages/eslint-plugin-cds/tests directory.

Frequently asked questions

What does the Eslint Plugin Custom Rule AI skill do?

USE THIS when asked to create a new eslint plugin rule for the eslint-plugin-cds package

Why use Eslint Plugin Custom Rule on TypingMind?

Because you install it once and use it with any model. Eslint Plugin Custom Rule is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Eslint Plugin Custom Rule in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/coinbase/cds/tree/master/.claude/skills/eslint-plugin-custom-rule. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Eslint Plugin Custom Rule?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Eslint Plugin Custom Rule?

As many as you like. As long as a model supports skills, you can use Eslint Plugin Custom Rule with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Eslint Plugin Custom Rule AI skill free?

It is published on GitHub by coinbase. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Deslop

openclaw

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Discrawl

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Gitcrawl

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Writing new rules

Process

Directory placement

Frequently asked questions

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