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Compiler Verify · react | DecimalAI

testingby react

Compiler Verify

react/compiler-verify

Source react/react ↗License MIT

Use when you need to run all compiler checks (tests, lint, format) before committing. Detects whether TS or Rust code changed and runs the appropriate checks.

SkillScore74Maintained

Automatic

Coding pack

Last verified 9/26/2026

What it changes

Passed 13 of 17 test cases with the skill, and 6 of 17 without it.

Without skill35%

With skill74%

Checks it passed that the model alone missed

The response specifies yarn snap -p inline-jsx.
The response specifies bash compiler/scripts/test-babel-ast.sh.
The response states that test-rust-port.sh must have zero failures.

and 6 more in the full report

9 fixed8 passed either way6 still failing0 broke

Pass-rate lift: +39 pp
Tokens: -45%
Agent turns: 0%
Response time: -64%

Model gemini-3.6-flashMeasured 9/26/2026v117 of 23 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-compiler-verify/SKILL.md https://app.decimal.ai/s/react-compiler-verify/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add react-compiler-verify, 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-compiler-verify/ and pins it in .decimal/skills.lock

decimalai skills add react-compiler-verify

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

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

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

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 9

Prompt

I modified a JSX transforms pass in `compiler/packages/` and want to run snapshot tests specifically for the 'inline-jsx' pattern without running all snapshot fixtures. What exact command should I run?

What was checked, without and with the skill
Checked	Without skill	With skill
The response specifies yarn snap -p inline-jsx.	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.md39 linessingle file

Compiler Verify

Run all verification steps for compiler changes.

Arguments:

$ARGUMENTS: Optional test pattern for yarn snap -p <pattern>

Instructions

Detect what changed by running git diff --name-only HEAD (or vs the base branch). Categorize changes:
- TS changes: files in compiler/packages/
- Rust changes: files in compiler/crates/
- Both: run all checks
If TS changed, run these sequentially (stop on failure):
- yarn snap (or yarn snap -p <pattern> if a pattern was provided) — compiler tests
- yarn test — test full compiler
- yarn workspace babel-plugin-react-compiler lint — lint compiler source
If Rust changed, run these sequentially (stop on failure):
- bash compiler/scripts/test-babel-ast.sh — Babel AST round-trip tests
- bash compiler/scripts/test-rust-port.sh — full Rust port test suite (compares Rust vs TS compiler output across all passes; must have 0 failures — do not regress)
- yarn snap --rust — end-to-end snap tests using the Rust compiler (compares compiled output and logger events against .expect.md fixtures; use yarn snap --rust -p <pattern> for focused checks)
Always run (from the repo root):
- yarn prettier-all — format all changed files
If implementing a plan doc, check:
- Plan doc has no unaddressed "Remaining Work" items
- Plan doc status is updated to reflect current state
Report results: list each step as passed/failed. On failure, stop and show the error with suggested fixes.

Common Mistakes

Running yarn snap without -p is fine for full verification, but slow. Use -p for focused checks.
Running prettier from compiler/ — must run from the repo root.
Forgetting Rust tests — if you touched .rs files, always run the round-trip test and yarn snap --rust.

Track record

Benchmark

13 / 17

test cases passed, vs 6 / 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

compiler/.claude/skills/compiler-verify/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.

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See it in action

What's inside

Compiler Verify

Instructions

Common Mistakes

Track record

Benchmark

Adoption

SkillSafety

Source

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