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Agent skill

Es X Major Version Prep

by eslint-community in eslint-community/eslint-plugin-es-x

Prepare eslint-plugin-es-x for a major version release from a broad instruction such as "prepare the major version upgrade" or "prepare the next major release".

MITAuto-check passedDevelopment

Install Es X Major Version Prep

skills CLI
$ npx skills add eslint-community/eslint-plugin-es-x --skill es-x-major-version-prep -a claude-code

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

GitHub CLI
$ gh skill install eslint-community/eslint-plugin-es-x es-x-major-version-prep --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/eslint-community/eslint-plugin-es-x.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/es-x-major-version-prep .claude/skills/es-x-major-version-prep && 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/

Facts

Skill name
es-x-major-version-prep
GitHub stars
157
Token cost
~801 tokens
SKILL.md length
342 words
Files
1
Skills in repo
6
Repo updated
First seen
Licence
MIT

At a glance

Prepare eslint-plugin-es-x for a major version release from a broad instruction such as "prepare the major version upgrade" or "prepare the next major release".

  • Works in 9 steps: Inspect the starting state → Identify why this is a major release → Split the work into separate PR-sized… → …
  • Split the release-prep work into PR-sized tasks: inspect release policy and repo state
  • SKILL.md covers Checklist, Guardrails and Common ES Snapshot Path
  • Calls npm, git and changeset

What it does

Es X Major Version Prep is an agent skill from eslint-community/eslint-plugin-es-x. Prepare eslint-plugin-es-x for a major version release from a broad instruction such as "prepare the major version upgrade" or "prepare the next major release". Use to split the release-prep work into PR-sized tasks: inspect release policy and repo state, schedule old Node.js support drops and old ESLint support drops as separate PRs, decide whether the yearly ECMAScript snapshot config update is needed, regenerate generated files for one coherent task, add a major Changesets entry through the generic Changesets…

Its SKILL.md is about 800 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Linting and formatting and Code migrations. It works with ESLint, JavaScript, Node.js and npm. The repository describes itself as: ESLint plugin about ECMAScript syntactic features. The licence is MIT.

When your agent uses it

  • Split the release-prep work into PR-sized tasks: inspect release policy and repo state
  • Schedule old Node.js support drops and old ESLint support drops as separate PRs
  • Decide whether the yearly ECMAScript snapshot config update is needed
  • Regenerate generated files for one coherent task

Example prompts

  • “prepare the major version upgrade”
  • “prepare the next major release”
  • “/es-x-major-version-prep”

Requirements

  • Node.js

Workflow steps

9 steps, taken from the first numbered list in SKILL.md.

  1. Inspect the starting state
  2. Identify why this is a major release
  3. Split the work into separate PR-sized tasks. Do not combine Node.js support drops, ESLint support drops, and annual snapshot config…
  4. For the Node.js support-drop PR, use .agents/es-x-node-support-update/SKILL.md.
  5. For the ESLint support-drop PR, use .agents/es-x-eslint-support-update/SKILL.md.
  6. For the annual snapshot config PR, use .agents/es-x-snapshot-config-update/SKILL.md.
  7. For each PR-sized task, add or update that task's own major Changesets entry using .agents/es-x-changeset/SKILL.md.
  8. For each PR-sized task, verify that task's own result using .agents/es-x-release-verification/SKILL.md.
  9. Final response should state

What it can do on your machine

Read from SKILL.md and the folder at commit b80ba91. 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

    Shell commands in SKILL.md call:

    • npm
    • git
    • changeset

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npm and git, which can reach the network depending on how they are called.

    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

Es X Major Version Prep loads about 801 tokens when it runs. Until then it costs about 151 tokens; SKILL.md has 342 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~151
When it runs · the whole SKILL.md, loaded when a task matches
~801

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 eslint-community/eslint-plugin-es-x at commit b80ba91, republished under its MIT licence (© eslint-community). 342 words, ~801 tokens.

Download SKILL.mdSave it as .claude/skills/es-x-major-version-prep/SKILL.md (or your agent's skills folder).
name
es-x-major-version-prep
description
Prepare eslint-plugin-es-x for a major version release from a broad instruction such as "prepare the major version upgrade" or "prepare the next major release". Use to split the release-prep work into PR-sized tasks: inspect release policy and repo state, schedule old Node.js support drops and old ESLint support drops as separate PRs, decide whether the yearly ECMAScript snapshot config update is needed, regenerate generated files for one coherent task, add a major Changesets entry through the generic Changesets skill, run verification, and summarize remaining follow-up PRs.

ES-X Major Version Prep

Checklist

Use this as the entry-point skill when the user gives a broad major-version-prep request.

  1. Inspect the starting state:
    • git status --short
    • current branch
    • package.json
    • .changeset/config.json
    • README semantic versioning policy
  2. Identify why this is a major release:
    • yearly ECMAScript/ECMA-402 snapshot config update
    • supported Node.js or ESLint range change
    • breaking config behavior change
    • packaging/API break
  3. Split the work into separate PR-sized tasks. Do not combine Node.js support drops, ESLint support drops, and annual snapshot config updates unless the user explicitly asks for a combined PR.
  4. For the Node.js support-drop PR, use .agents/es-x-node-support-update/SKILL.md.
  5. For the ESLint support-drop PR, use .agents/es-x-eslint-support-update/SKILL.md.
  6. For the annual snapshot config PR, use .agents/es-x-snapshot-config-update/SKILL.md.
  7. For each PR-sized task, add or update that task's own major Changesets entry using .agents/es-x-changeset/SKILL.md.
  8. For each PR-sized task, verify that task's own result using .agents/es-x-release-verification/SKILL.md.
  9. Final response should state:
    • what changed
    • which major-prep task this PR covers
    • which related major-prep tasks should be separate follow-up PRs
    • which checks passed
    • any checks that could not run or failed for an unrelated dependency/tooling reason

Guardrails

Do not run changeset version, npm version, publish commands, tag commands, or pushes unless the user explicitly asks for the actual release/versioning step.

Do not directly edit generated config/docs output when the generator can produce it. Prefer changing the source input and running npm run update.

Do not silently ignore unrelated dirty worktree files. Work around unrelated changes; mention blockers only if they prevent the major-prep task.

Common ES Snapshot Path

For the annual ECMAScript snapshot major release, the usual concrete work is:

  1. Keep it separate from the Node.js support-drop PR and the ESLint support-drop PR.
  2. Update LATEST_ES_YEAR in scripts/rules.ts.
  3. Run npm run update.
  4. Confirm new no-new-in-esYYYY and restrict-to-es{YYYY-1} configs exist for both legacy and flat config surfaces.
  5. Confirm lib/index.ts exposes the new config keys.
  6. Confirm docs moved ESYYYY rules from no-new-in-esnext* to stable config links.
  7. Add a .changeset/*.md entry with a major bump.
  8. Run verification checks for this snapshot-config PR.

© eslint-community, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/es-x-major-version-prep of eslint-community/eslint-plugin-es-x.

Open the folder on GitHubat commit b80ba91

Compare with similar skills

Es X Major Version Prep 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.

Es X Major Version Prep compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Es X Major Version Prep this skilleslint-community/eslint-plugin-es-x157—~801Automated safety check: PassMIT
Typescript Tooling MigrationArize-ai/phoenix12k—~2.8kAutomated safety check: PassApache-2.0
Static Code Analysis Typescriptjaktestowac/awesome-copilot-for-testers116—~4.2kAutomated safety check: PassMIT
Eslintmanagedcode/dotnet-skills486—~1.5kAutomated safety check: PassMIT
Webhintmanagedcode/dotnet-skills486—~1.3kAutomated safety check: PassMIT
Install Anti-Slop Oxlint Rulesdmmulroy/anti-slop5.3k—~2.2kAutomated safety check: PassMIT

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More from eslint-community/eslint-plugin-es-x

  • Es X Changeset

    eslint-community/eslint-plugin-es-x

    Add or update Changesets entries for eslint-plugin-es-x. An agent skill from eslint-community/eslint-plugin-es-x.

    157 GitHub stars~383 tokensUpdated 14 days ago
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  • Es X Snapshot Config Update

    eslint-community/eslint-plugin-es-x

    Update eslint-plugin-es-x for a newly finalized yearly ECMAScript/ECMA-402 snapshot in its own dedicated PR.

    157 GitHub stars~550 tokensUpdated 14 days ago
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  • Es X Eslint Support Update

    eslint-community/eslint-plugin-es-x

    Update eslint-plugin-es-x ESLint peer support in its own dedicated PR.

    157 GitHub stars~798 tokensUpdated 14 days ago
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  • Es X Node Support Update

    eslint-community/eslint-plugin-es-x

    Update eslint-plugin-es-x Node.js support in its own dedicated PR.

    157 GitHub stars~980 tokensUpdated 14 days ago
    Auto-check passed

  • Es X Release Verification

    eslint-community/eslint-plugin-es-x

    Verify eslint-plugin-es-x changes before handoff or release preparation.

    157 GitHub stars~388 tokensUpdated 14 days ago
    Auto-check passed

Works with

Categories

Questions about Es X Major Version Prep

What does Es X Major Version Prep do?

Prepare eslint-plugin-es-x for a major version release from a broad instruction such as "prepare the major version upgrade" or "prepare the next major release". Es X Major Version Prep is an agent skill from eslint-community/eslint-plugin-es-x. Prepare eslint-plugin-es-x for a major version release from a broad instruction such as "prepare the major version upgrade" or "prepare the next major release".

When should I use Es X Major Version Prep?

Es X Major Version Prep fits situations like: split the release-prep work into PR-sized tasks: inspect release policy and repo state; schedule old Node.js support drops and old ESLint support drops as separate PRs; decide whether the yearly ECMAScript snapshot config update is needed; regenerate generated files for one coherent task.

How do I install Es X Major Version Prep in Claude Code?

Run `npx skills add eslint-community/eslint-plugin-es-x --skill es-x-major-version-prep -a claude-code`. Or copy the skill folder (.agents/skills/es-x-major-version-prep in eslint-community/eslint-plugin-es-x) into .claude/skills/es-x-major-version-prep in your project. Claude Code loads it when a task matches its description.

How do I install Es X Major Version Prep in Codex?

Run `npx skills add eslint-community/eslint-plugin-es-x --skill es-x-major-version-prep -a codex`. Or copy the skill folder (.agents/skills/es-x-major-version-prep in eslint-community/eslint-plugin-es-x) into .agents/skills/es-x-major-version-prep in your project. Codex loads it when a task matches its description.

Can I use Es X Major Version Prep 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 eslint-community/eslint-plugin-es-x --skill es-x-major-version-prep -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/es-x-major-version-prep, .gemini/skills/es-x-major-version-prep, .github/skills/es-x-major-version-prep and .opencode/skills/es-x-major-version-prep in your project.

What does Es X Major Version Prep need to run?

Going by SKILL.md and its folder, Es X Major Version Prep needs the command-line tools its instructions call (npm, git and changeset). Our summary lists: Node.js.

Does Es X Major Version Prep access the network?

SKILL.md contains no URLs. Its commands use npm and git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Es X Major Version Prep 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 Es X Major Version Prep use?

Es X Major Version Prep 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 Es X Major Version Prep use?

About 801 tokens (SKILL.md is roughly 3.2k 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 Es X Major Version Prep?

Skills that share tags, products or a category with Es X Major Version Prep: Typescript Tooling Migration (Arize-ai/phoenix, 12k stars), Static Code Analysis Typescript (jaktestowac/awesome-copilot-for-testers, 116 stars), Eslint (managedcode/dotnet-skills, 486 stars) and Webhint (managedcode/dotnet-skills, 486 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Es X Major Version Prep?

eslint-community (a GitHub organization) maintains it in eslint-community/eslint-plugin-es-x, which has 157 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on September 25, 2026.

Source: eslint-community/eslint-plugin-es-x on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.