feature-flags

Use when feature flag tests fail, flags need updating, understanding @gate pragmas, debugging channel-specific test failures, or adding new flags to React.

1.66x

Quality

80%

Does it follow best practices?

Impact

98%

1.66x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./.claude/skills/feature-flags/SKILL.md

Evaluation results

97%

28%

Register a New React Feature Flag

New flag registration across all channels

Criteria

Without context

With context

Flag in main file

100%

Default value set

100%

www fork file created

100%

native-fb fork file created

100%

test-renderer fork file created

100%

57%

__VARIANT__ in www fork

100%

__VARIANT__ in native-fb fork

100%

test-renderer not __VARIANT__

100%

Flag name consistent

100%

Fork files re-export main

87%

100%

All four files present

100%

33%

Write Feature-Flag-Aware Tests for a React Component

Correct @gate pragma vs gate() inline usage

Criteria

Without context

With context

@gate pragma used

100%

@gate on unavailable-feature tests

100%

gate() inline used

100%

gate() on behavior-difference tests

100%

Correct gate() syntax

100%

No @gate on behavior-difference tests

100%

3+ @gate tests

100%

2+ inline gate() tests

100%

No jest.skip substitution

100%

Correct flag names in gating

57%

100%

98%

56%

Investigate a React CI Failure in the www Channel

Channel-specific failure debugging workflow

Criteria

Without context

With context

/flags --diff command

100%

/test www command

72%

100%

__VARIANT__ double-test

100%

Fork file completeness check

53%

100%

@gate condition check

81%

100%

__VARIANT__ explanation

100%

/flags view step

71%

Checklist file present

100%

Structured steps

100%

Concrete commands

100%

Repository: facebook/react
Commit: 705268d

Evaluated: about 1 month ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Register a New React Feature Flag Write Feature-Flag-Aware Tests for a React Component Investigate a React CI Failure in the www Channel

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