What is migrate-oxfmt?

A migration guide for replacing Prettier or Biome with Oxfmt in a JavaScript or TypeScript project. A code formatter automatically rearranges source files into a consistent style.

Use it to generate Oxfmt configuration from Prettier or Biome, migrate formatting and ignore rules, and identify options that need further attention.

It reduces manual configuration work and helps preserve existing formatting preferences during the switch. It also maps settings and ignored files from the old formatter.

How Ohh-889/skyroc configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to Ohh-889/skyroc. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Ohh-889/skyroc/master/.agents/skills/migrate-oxfmt/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/Ohh-889/skyroc

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ohh-889/skyroc/migrate-oxfmt/github.svg)](https://agentmods.dev/skills/ohh-889/skyroc/migrate-oxfmt)

Your own site

<a href="https://agentmods.dev/skills/ohh-889/skyroc/migrate-oxfmt"><img src="https://agentmods.dev/badge/skills/ohh-889/skyroc/migrate-oxfmt/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/ohh-889/skyroc/migrate-oxfmt"><img src="https://agentmods.dev/badge/skills/ohh-889/skyroc/migrate-oxfmt.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,066 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 warn 7 Sept 2026

SkillSpector: 11 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium MCP Rug Pull · line 19
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 33
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 169
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 170
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 188
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 193
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 196
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 161
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 162
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 165
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 166
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]

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.

Model	Per session	Once invoked
Fable 5.1	$0.00053	$0.02066
Opus 5.5	$0.00021	$0.00826
Sonnet 5.5	$0.00011	$0.00413
Haiku 4.5	$0.00005	$0.00207

Measured 1mo ago against content hash ecfea98040b9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

migrate-oxfmt 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 1mo 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.

.agents/skills/migrate-oxfmt/SKILL.md · 203 lines

How it starts

The opening of the file, as written. The whole thing — 203 lines — stays where its author put it; the contents beside it link to each section on GitHub.

This skill guides you through migrating a JavaScript/TypeScript project from Prettier or Biome to Oxfmt.

Overview

Oxfmt is a high-performance, Prettier-compatible code formatter. Most Prettier options are supported directly.

An automated migration tool is built into oxfmt, supporting both Prettier and Biome as migration sources.

Step 1: Run Automated Migration

From Prettier

npx oxfmt@latest --migrate prettier

This will:

Find and read your Prettier config (any format Prettier supports)
Create .oxfmtrc.json with migrated options
Migrate .prettierignore patterns to ignorePatterns
Migrate prettier-plugin-tailwindcss options to sortTailwindcss
Detect prettier-plugin-packagejson and enable sortPackageJson

From Biome

npx oxfmt@latest --migrate biome

This will:

Find and read biome.json or biome.jsonc
Create .oxfmtrc.json with migrated options
Migrate negated patterns from files.includes to ignorePatterns
Map Biome's two-level config (formatter.* and javascript.formatter.*) to oxfmt options

Biome option mapping:

Biome	oxfmt
`formatter.indentStyle` (`"tab"`/`"space"`)	`useTabs` (`true`/`false`)
`formatter.indentWidth`	`tabWidth`
`formatter.lineWidth`	`printWidth`
`javascript.formatter.quoteStyle`	`singleQuote`
`javascript.formatter.jsxQuoteStyle`	`jsxSingleQuote`
`javascript.formatter.quoteProperties` (`"asNeeded"`)	`quoteProps` (`"as-needed"`)
`javascript.formatter.trailingCommas`	`trailingComma`
`javascript.formatter.semicolons` (`"always"`/`"asNeeded"`)	`semi` (`true`/`false`)
`javascript.formatter.arrowParentheses` (`"asNeeded"`)	`arrowParens` (`"avoid"`)
`formatter.bracketSameLine`	`bracketSameLine`
`formatter.bracketSpacing`	`bracketSpacing`
`formatter.attributePosition` (`"multiline"`)	`singleAttributePerLine` (`true`)

Read the full file on GitHub · 203 lines

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.

1mo ago First seen · 203 lines · 53 tokens per session scan A ecfea98040b9

Subscribe to this mod's changes

migrate-oxfmt is a skill published in the GitHub repository Ohh-889/skyroc (797 stars, last pushed 1mo ago), licensed MIT. It adds 53 tokens to every session and 2,066 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 2026-08-30.

Languages admin antd react-admin react19 tanstack-query

antd

Use when the user's task involves Ant Design (antd) — writing antd components, debugging antd issues, querying antd APIs/props/tokens/demos, migrating between antd versions, or analyzing antd usage in a project. Triggers on antd-related code, imports from 'antd', or explicit antd questions.

ant-design/ant-design-pro · 69 tokens

skyroc: Skill for Claude Code

Borrowing it

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

Overview

Step 1: Run Automated Migration

From Prettier

From Biome

What this file has done since we first saw it

Other skills, from other repositories

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owl-admin-devtools-generator

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