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RulePort: Instructions file for GitHub Copilot

.github/instructions/typescript-standards.instructions.md

RulePort typescript-standards.instructions.md is an instructions file for GitHub Copilot from lewiesnyder/RulePort. It costs 242 tokens per session, scanned A, original, MIT.

A set of coding rules for TypeScript, a programming language commonly used for JavaScript projects with type checking. It defines preferred syntax, asynchronous code, errors, dependencies, and testing tools.

In plain words
What is it for?
Use it when writing or reviewing TypeScript, especially scripts that use async operations, command-line errors, native modules, YAML, or Vitest tests.
Why use it?
It reduces inconsistent code and makes scripts easier to understand, test, and maintain.

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 242 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/typescript-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 typescript-standards.instructions.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/lewiesnyder/ruleport/typescript-standards"><img src="https://agentmods.dev/badge/instructions/lewiesnyder/ruleport/typescript-standards.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 242 This file is loaded in full into every session.
When invoked 242 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 $0.00242 $0.00242
Opus 5.5 $0.00097 $0.00097
Sonnet 5.5 $0.00048 $0.00048
Haiku 4.5 $0.00024 $0.00024

Measured 2mo ago against content hash 40445f25e17a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

RulePort typescript-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/typescript-standards.instructions.md · 27 lines

What it actually says

TypeScript Standards

Syntax

  • Use ES Modules (import / export) for all TypeScript files.
  • Use const for variables that don't change, let for those that do. Avoid var.
  • Use String Interpolation (Template Literals) over concatenation.
  • Use Interfaces for object definitions and public contracts.
  • Use Explicit Return Types for public functions to ensure stable contracts.

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 for parsing.
  • Use vitest for testing.
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 · 27 lines · 242 tokens per session scan A 40445f25e17a

Subscribe to this mod's changes

RulePort typescript-standards.instructions.md is an instructions file published in the GitHub repository lewiesnyder/RulePort (2 stars, last pushed 8mo ago), licensed MIT. It adds 242 tokens to every session, about $0.0010 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.

LanguagesTypeScript
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