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Test · react | DecimalAI

testingby react

Test

react/test

Source react/react ↗License MIT

Use when you need to run tests for React core. Supports source, www, stable, and experimental channels.

SkillScore77Maintained

Automatic

QA & Test Engineering pack

Last verified 9/26/2026

What it changes

Passed 13 of 17 test cases with the skill, and 5 of 17 without it.

Without skill27%

With skill77%

Checks it passed that the model alone missed

The response includes `--silent`.
The response includes `--no-watchman`.
The response uses `test-www` as the script name.

and 12 more in the full report

12 fixed5 passed either way4 still failing1 broke

Pass-rate lift: +50 pp
Tokens: -31%
Agent turns: 0%
Response time: -49%

Model gemini-3.6-flashMeasured 9/26/2026v117 of 22 cases passed with skill · 17 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/react-test/SKILL.md https://app.decimal.ai/s/react-test/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add react-test, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/react-test/ and pins it in .decimal/skills.lock

decimalai skills add react-test

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/react-test/SKILL.md https://app.decimal.ai/s/react-test/SKILL.md

Raw file: /s/react-test/SKILL.md ↗ · machine-readable summary at /s/react-test.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

What is the command to run unit tests for ReactPortal under the standard www-modern release target?

What was checked, without and with the skill
Checked	Without skill	With skill
The response specifies `yarn test-www --silent --no-watchman ReactPortal`.	Missed	Passed

case-19 · gemini-3.6-flash · 9/26/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md41 linessingle file

Run tests for the React codebase.

Arguments:

$ARGUMENTS: Channel, flags, and test pattern

Usage Examples:

/test ReactFiberHooks - Run with source channel (default)
/test experimental ReactFiberHooks - Run with experimental channel
/test www ReactFiberHooks - Run with www-modern channel
/test www variant false ReactFiberHooks - Test VARIANT=false
/test stable ReactFiberHooks - Run with stable channel
/test classic ReactFiberHooks - Run with www-classic channel
/test watch ReactFiberHooks - Run in watch mode (TDD)

Release Channels:

(default) - Source/canary channel, uses ReactFeatureFlags.js defaults
experimental - Source/experimental channel with EXPERIMENTAL flags = true
www - www-modern channel with VARIANT flags = true
www variant false - www channel with VARIANT flags = false
stable - What ships to npm
classic - Legacy www-classic (rarely needed)

Instructions:

Parse channel from arguments (default: source)
Map to yarn command:
- (default) → yarn test --silent --no-watchman <pattern>
- experimental → yarn test -r=experimental --silent --no-watchman <pattern>
- stable → yarn test-stable --silent --no-watchman <pattern>
- classic → yarn test-classic --silent --no-watchman <pattern>
- www → yarn test-www --silent --no-watchman <pattern>
- www variant false → yarn test-www --variant=false --silent --no-watchman <pattern>
Report test results and any failures

Hard Rules:

Use --silent to see failures - This limits the test output to only failures.
Use --no-watchman - This is a common failure in sandboxing.

Common Mistakes:

Running without a pattern - Runs ALL tests, very slow. Always specify a pattern.
Forgetting both www variants - Test www AND www variant false for __VARIANT__ flags.

Track record

Benchmark

13 / 17

test cases passed, vs 5 / 17 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 8/31/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

react / react

.claude/skills/test/SKILL.md

View on GitHub ↗

License MITImported 8/31/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.