Javascript LanguageSAFE

A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages

The instruction file, verbatim from the audited commit — this is the text the model reads, and the surface the audit's instruction layer examines. Quoted here so you can judge it without cloning anything.

---
name: javascript-language
description: Modern JavaScript (ES2022+) patterns for clean, maintainable code. Use when working with modern JavaScript features like optional chaining, nullish coalescing, or ESM.
metadata:
  triggers:
    files:
    - '**/*.js'
    - '**/*.mjs'
    - '**/*.cjs'
    keywords:
    - const
    - let
    - arrow
    - async
    - await
    - promise
    - destructuring
    - spread
    - class
---
# JavaScript Language Patterns

## **Priority: P0 (CRITICAL)**

## Implementation Guidelines

- **Variables**: const default. let if needed. No var — block scope only.
- **Functionality**: Use **`Arrow Functions`** for callbacks/inlines; **`Function Declaration`** for core logic.
- **Async Logic**: Use async/await with try/catch and Promise.all() for parallel operations. ESM import/export only. No Callbacks — promisify everything.
- **Modern Syntax**: Use Destructuring, Spread (...), Optional Chain ?. and Nullish ?? coalescing.
- **String Handling**: Use **`Template Literals`** (backticks) for interpolation and multi-line strings.
- **Data Collections**: Prefer **`map`**, **`filter`**, and **`reduce`** over imperative `for` loops.
- **Modules**: Standardize on ESM import/export; use Named Exports over Default.
- **Encapsulation**: Leverage **`#private`** class fields for encapsulation.
- **Error States**: Throw **`new Error()`** with descriptive messages; never throw strings.

## Anti-Patterns

- No var — Block scope only.
- **No `==`**: Strict `===`.
- **No `new Object()`**: Use literals `{}`.
- No Callbacks: Promisify everything.
- **No Mutation**: Immutability first.

## Code & Reference

See [references/REFERENCE.md](references/REFERENCE.md) for modern syntax, async patterns, private fields, and functional programming examples.

## Related Topics

best-practices | tooling

## Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:
- ESM import/export
- No Callbacks
- No var
- Nullish ??
- Optional Chain ?.
- async/await
- const default
- let if needed
- user?.profile?.name

- Additional task-grounded exact anchors: try/catch

SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.

What the source does

Filesystem

none-observed

Network

none-observed

Shell

none-observed

Dependencies

pinned

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none-found

Findings (0)

No findings outside the package's declared scope.

Gates applied: no_behavioural_pass.