rulesync copilot-instructions.md

A set of repository instructions for AI coding assistants, including GitHub Copilot. It defines TypeScript style rules, testing expectations, and security practices for a codebase.

In plain words
What is it for?
Guiding TypeScript changes, requiring tests for business logic, and preventing unsafe practices such as hardcoded credentials or destructive shell commands.
Why use it?
It gives coding assistants consistent project-specific rules instead of leaving choices about style, tests, and secrets to guesswork.

Instructions file for GitHub Copilot

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/juwonllee2024-dotcom/rulesync/copilot-instructions
Clone the repo
git clone --depth 1 https://github.com/juwonllee2024-dotcom/rulesync

Made for: GitHub Copilot.

Per session 237 This file is loaded in full into every session.
When invoked 237 The same file — it is already loaded in full.
Security scan B 2 findings. Scan, not verified.
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 $0.00237 $0.00237
Opus 5 $0.00118 $0.00118
Sonnet 5 $0.00047 $0.00047
Haiku 4.5 $0.00024 $0.00024

Measured 2d ago against content hash f4c7823822a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

rulesync copilot-instructions.md scanned grade B with 2 findings 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 2d 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.

Asks for rootlowPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- Do not execute destructive shell commands (`rm -rf`, `chmod 777`).

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- Do not execute destructive shell commands (`rm -rf`, `chmod 777`).

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

.github/copilot-instructions.md · 28 lines

What it actually says

Repository AI Rules

Canonical repository instructions for AI coding assistants (Claude Code, Cursor, Copilot, Cline, Windsurf).

GitHub Copilot Repository Instructions

Code Style & Standards

Applicable files: **/*.ts, **/*.tsx

  • Always use TypeScript strict mode with explicit return types.
  • Prefer named exports over default exports.
  • Use immutable state updates and modern ES2022+ syntax.

Testing & Quality

Applicable files: tests/**/*.ts, **/*.spec.ts

  • Write unit tests for all business logic using Vitest or Jest.
  • Maintain high test coverage and test edge cases and error paths explicitly.

Security & Privacy Guidelines

  • Never hardcode API keys, access tokens, or secrets in source code.
  • Always validate external input and check path resolution bounds.
  • Do not execute destructive shell commands (rm -rf, chmod 777).
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. 2d ago First seen · 28 lines · 237 tokens per session scan B f4c7823822a9

Subscribe to this mod's changes

rulesync copilot-instructions.md is an instructions file published in the GitHub repository juwonllee2024-dotcom/rulesync (3 stars, last pushed 11d ago), licensed MIT. It adds 237 tokens to every session, about $0.0012 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.