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/flow

@a056625 official
by Metafacebook/react251k stars
51,417

Use when you need to run Flow type checking, or when seeing Flow type errors in React code.

Ask your Agent

Use this Skill: https://skilld.dev/gh/facebook/react/flow

This session only. Nothing lands on disk.

SKILL.md

≈24 tokens always: the name and description. ≈190 when used: this file.

Flow Type Checking

Arguments:

  • $ARGUMENTS: Renderer to check (default: dom-node)

Renderers

Renderer When to Use
dom-node Default, recommended for most changes
dom-browser Browser-specific DOM code
native React Native
fabric React Native Fabric

Instructions

  1. Run yarn flow $ARGUMENTS (use dom-node if no argument)
  2. Report type errors with file locations
  3. For comprehensive checking (slow), use yarn flow-ci

Common Mistakes

  • Running without a renderer - Always specify or use default dom-node
  • Ignoring suppressions - Check if $FlowFixMe comments are masking real issues
  • Missing type imports - Ensure types are imported from the correct package

Source: SKILL.md on GitHub

Third-party checks

1 warning3mo5 checks · Risk MEDIUM
  • Gen Agent Trust Hub3mo

    The skill allows running Flow type checks but contains a potential command injection vulnerability where user-supplied arguments are passed directly to a shell command without validation.

  • Socket3mo

    No alerts

  • Snyk3mo

    Risk: LOW · No issues

  • Runlayer7mo

    1 file scanned · No issues

  • ZeroLeaks5mo

    Score: 93/100 · 2 sections analyzed

Provenance

Signed by skilld at a056625. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.

Last checked against GitHub yesterday.

Activeupdated 8 months ago

Topics

  • React
  • flow
  • type-checking
  • react-native
  • typescript-alternative
  • dom
  • yarn

README badge

README badge for facebook/react/flow

What it does

Runs Flow type checking on React code with configurable renderers for DOM, browser, or React Native targets. Use this when encountering Flow errors in Facebook's React codebase or need to validate type safety across dom-node, dom-browser, native, and fabric renderers.

Generated from the current SKILL.md.

Frequently asked

What renderers does this skill support?
Four renderers: dom-node (default), dom-browser (for browser-specific code), native (React Native), and fabric (React Native Fabric).
Do I need to specify a renderer every time?
No. The skill defaults to dom-node if no renderer argument is provided, which is recommended for most changes.
When should I use yarn flow-ci instead of yarn flow?
Use yarn flow-ci for comprehensive type checking, though it runs slower than the standard yarn flow command.
What should I watch out for when using this skill?
Avoid running without a renderer, check if $FlowFixMe comments are hiding real issues, and ensure types are imported from the correct package.

Generated from the current SKILL.md. These answers refresh after source changes.