no-case-insensitive-input-id-collision

Rule catalog ID: R048

Targeted pattern scope

Action metadata input ID keys under inputs.

What this rule reports

Reports input IDs that collide when normalized case-insensitively.

Why this rule exists

Case-variant IDs are confusing for callers and easy to misread in workflow with: blocks.

❌ Incorrect

inputs:
  Token:
    description: First input
  token:
    description: Second input

✅ Correct

inputs:
  token:
    description: Access token

Additional examples

For larger repositories, this rule is often enabled together with one of the published presets so violations are caught in pull requests before workflow changes are merged.

ESLint flat config example

import githubActions from "eslint-plugin-github-actions-2";

export default [
  {
    files: ["**/*.{yml,yaml}"],
    plugins: {
      "github-actions": githubActions,
    },
    rules: {
      "github-actions/no-case-insensitive-input-id-collision": "error",
    },
  },
];

When not to use it

You can disable this rule when its policy does not match your repository standards, or when equivalent enforcement is already handled by another policy tool.

Targeted pattern scope​

What this rule reports​

Why this rule exists​

❌ Incorrect​

✅ Correct​

Additional examples​

ESLint flat config example​

When not to use it​

Further reading​