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RulePort: Instructions file for GitHub Copilot

.github/instructions/javascript-standards.instructions.md

RulePort javascript-standards.instructions.md is an instructions file for GitHub Copilot from lewiesnyder/RulePort. It costs 219 tokens per session, scanned A, original, MIT.

Node.js and JavaScript coding rules for a project that uses CommonJS modules and standard Node.js environments without a build step.

In plain words
What is it for?
They guide module syntax, variable declarations, async/await usage, fatal-error handling, dependency choices, and terminal error messages.
Why use it?
They create consistent expectations for syntax, asynchronous code, error handling, dependencies, and command-line failures. This makes contributions easier to review and run.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is lewiesnyder/RulePort's own configuration. It tells GitHub Copilot how to work on RulePort itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything RulePort configures →

not rated 2repo 8mo ago A scan 219 tokens original MIT
View source ↗ lewiesnyder/RulePort
Reuse

Borrowing it

Nothing to install: this file belongs to lewiesnyder/RulePort. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/lewiesnyder/RulePort/main/.github/instructions/javascript-standards.instructions.md
Clone the repo
git clone --depth 1 https://github.com/lewiesnyder/RulePort

Made for: GitHub Copilot.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for RulePort javascript-standards.instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/lewiesnyder/ruleport/javascript-standards/github.svg)](https://agentmods.dev/instructions/lewiesnyder/ruleport/javascript-standards)
Your own site
<a href="https://agentmods.dev/instructions/lewiesnyder/ruleport/javascript-standards"><img src="https://agentmods.dev/badge/instructions/lewiesnyder/ruleport/javascript-standards/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for RulePort javascript-standards.instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/lewiesnyder/ruleport/javascript-standards"><img src="https://agentmods.dev/badge/instructions/lewiesnyder/ruleport/javascript-standards.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 219 This file is loaded in full into every session.
When invoked 219 The same file — it is already loaded in full.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00219 $0.00219
Opus 5.5 $0.00088 $0.00088
Sonnet 5.5 $0.00044 $0.00044
Haiku 4.5 $0.00022 $0.00022

Measured 2mo ago against content hash a16b3b443be9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

RulePort javascript-standards.instructions.md scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- Minimize external dependencies. Usage of native `fs`, `path`, and `child_process` is preferred.
.github/instructions/javascript-standards.instructions.md · 25 lines

What it actually says

JavaScript Standards

Syntax

  • Use CommonJS (require) for this project to maintain compatibility with standard Node.js environments without build steps.
  • Use const for variables that don't change, let for those that do. Avoid var.
  • Use String Interpolation (Template Literals) over concatenation.

Async Patterns

  • Prefer async/await over raw .then() chains.
  • Always wrap top-level await implementations or main execution logic in try/catch blocks.

Error Handling

  • Scripts must exit with process.exit(1) on fatal errors.
  • console.error messages should be prefixed with an emoji (e.g., ❌) for visibility in terminal logs.

Dependencies

  • Minimize external dependencies. Usage of native fs, path, and child_process is preferred.
  • yaml is the only strictly required 3rd party dependency.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 25 lines · 219 tokens per session scan A a16b3b443be9

Subscribe to this mod's changes

RulePort javascript-standards.instructions.md is an instructions file published in the GitHub repository lewiesnyder/RulePort (2 stars, last pushed 8mo ago), licensed MIT. It adds 219 tokens to every session, about $0.0009 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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