Skill
extract-errors
Use when adding new error messages to React, or seeing "unknown error code" warnings.
Development
Skill
/flags
Use when you need to check feature flag states, compare channels, or debug why a feature behaves differently across release channels.
Install
$ npx -y skills add facebook/react --skill flags --agent claude-codeHow it fires
How this skill gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.Auto-invocation is when the right skill fires by itself at the right moment, driven by a FLOW.md router and a hook, instead of you invoking it by name. It is the difference between a skill being installed and a skill actually getting used.Read the full definition →
- You can call itInvoke it directly when you want it.
- Slash command
/flags
Context preview
The summary Claude sees to decide when to auto-load this skill.
Use when you need to check feature flag states, compare channels, or debug why a feature behaves differently across release channels.
SKILL.md
flags.SKILL.mdname: flags description: Use when you need to check feature flag states, compare channels, or debug why a feature behaves differently across release channels.
Feature Flags
Arguments:
- $ARGUMENTS: Optional flags
Options
| Option | Purpose | |--------|---------| | (none) | Show all flags across all channels | | `--diff <ch1> <ch2>` | Compare flags between channels | | `--cleanup` | Show flags grouped by cleanup status | | `--csv` | Output in CSV format |
Channels
- `www`, `www-modern` - Meta internal
- `canary`, `next`, `experimental` - OSS channels
- `rn`, `rn-fb`, `rn-next` - React Native
Legend
✅ enabled, ❌ disabled, 🧪 `__VARIANT__`, 📊 profiling-only
Instructions
1. Run `yarn flags $ARGUMENTS` 2. Explain the output to the user 3. For --diff, highlight meaningful differences
Common Mistakes
- **Forgetting `__VARIANT__` flags** - These are tested both ways in www; check both variants
- **Comparing wrong channels** - Use `--diff` to see exact differences
Ships withreact
React is a JavaScript library for building user interfaces. Declarative: React makes it painless to create interactive UIs.
Get the whole plugin
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Active
Maintenance
JavaScript
Language
MIT
License
11h ago
Last commit
13y ago
Created
Repo: facebook/react
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