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Port Compiler Pass · react | DecimalAI

codingby react

Port Compiler Pass

react/compiler-port

Source react/react ↗License MIT

Port a compiler pass from TypeScript to Rust. Gathers context, plans the port, implements in a subagent with test-fix loop, then reviews.

SkillScore58Maintained

Automatic

Coding pack

Last verified 9/27/2026

What it changes

Passed 10 of 17 test cases with the skill, and 4 of 17 without it.

Without skill25%

With skill58%

Checks it passed that the model alone missed

Maps HIRBuilder.ts to crate react_compiler_lowering.
Maps src/Validation/ to crate react_compiler_validation.
Passes the implementation plan from step 3 to the agent.

and 6 more in the full report

8 fixed6 passed either way10 still failing0 broke

Pass-rate lift: +33 pp
Tokens: -15%
Agent turns: 0%
Response time: -64%

Model gemini-3.6-flashMeasured 9/27/2026v114 of 24 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-port/SKILL.md https://app.decimal.ai/s/react-compiler-port/SKILL.md

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

decimalai skills add react-compiler-port

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

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

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

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 8 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 8

Prompt

We are porting passes inside `src/ReactiveScopes/` to Rust. What is the target crate name?

What was checked, without and with the skill
Checked	Without skill	With skill
Maps src/ReactiveScopes/ to crate react_compiler_reactive_scopes.	Missed	Passed

case-10 · gemini-3.6-flash · 9/27/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md96 linessingle file

Port Compiler Pass

Port a compiler pass from TypeScript to Rust end-to-end.

Arguments:

$ARGUMENTS: Pass name exactly as it appears in Pipeline.ts log entries (e.g., PruneMaybeThrows, SSA, ConstantPropagation)

Step 0: Validate pass name

Read compiler/packages/babel-plugin-react-compiler/src/Entrypoint/Pipeline.ts
Search for name: '$ARGUMENTS' in log entries
If not found, list all available pass names from the log({...name: '...'}) calls and stop
Check the kind field of the matching log entry:
- If kind: 'ast', report that test-rust-port only supports hir and reactive kind passes currently and stop
- If kind: 'hir' or kind: 'reactive', proceed

Step 1: Determine TS source files and Rust crate

Follow the import in Pipeline.ts to find the actual TypeScript file(s) for the pass
Map the TS folder to a Rust crate using this mapping:

TypeScript Path	Rust Crate
`src/HIR/` (excluding `BuildHIR.ts`, `HIRBuilder.ts`)	`react_compiler_hir`
`src/HIR/BuildHIR.ts`, `src/HIR/HIRBuilder.ts`	`react_compiler_lowering`
`src/Babel/`, `src/Entrypoint/`	`react_compiler`
`src/CompilerError.ts`	`react_compiler_diagnostics`
`src/ReactiveScopes/`	`react_compiler_reactive_scopes`
`src/<Name>/`	`react_compiler_<name>` (1:1, e.g., `src/Optimization/` -> `react_compiler_optimization`)

Check if the pass is already ported:
- Check if the corresponding Rust file exists in the target crate
- Check if compiler/crates/react_compiler/src/entrypoint/pipeline.rs already calls it
- If both are true, report the pass is already ported and stop

Step 2: Gather context

Read the following files (all reads happen in main context):

Architecture guide: compiler/docs/rust-port/rust-port-architecture.md

Track record

Benchmark

10 / 17

test cases passed, vs 4 / 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-port/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.

Ready to supercharge your AI agents?

See it in action

What's inside

Port Compiler Pass

Step 0: Validate pass name

Step 1: Determine TS source files and Rust crate

Step 2: Gather context

Track record

Benchmark

Adoption

SkillSafety

Source

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