AI-MarkDone: Instructions file for GitHub Copilot

.github/copilot-instructions.md

AI-MarkDone copilot-instructions.md is an instructions file for GitHub Copilot from zhaoliangbin42/AI-MarkDone. It costs 1,337 tokens per session, scanned A, original, MIT.

Repository instructions for a browser extension that improves copying Markdown from ChatGPT and Gemini. They describe how the extension handles formulas, tables, code, multiple websites, and isolated interface components.

In plain words
What is it for?
Use them when adding support for a website, changing content extraction or Markdown conversion, or updating the extension's toolbar and dialogs.
Why use it?
They show the agent where platform-specific behavior belongs and how to avoid conflicts with the pages the extension modifies.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is zhaoliangbin42/AI-MarkDone's own configuration. It tells GitHub Copilot how to work on AI-MarkDone 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 AI-MarkDone configures →

Reuse

Borrowing it

Nothing to install: this file belongs to zhaoliangbin42/AI-MarkDone. 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/zhaoliangbin42/AI-MarkDone/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/zhaoliangbin42/AI-MarkDone

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 AI-MarkDone copilot-instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/zhaoliangbin42/ai-markdone/copilot-instructions.svg)](https://agentmods.dev/instructions/zhaoliangbin42/ai-markdone/copilot-instructions)
Your own site
<a href="https://agentmods.dev/instructions/zhaoliangbin42/ai-markdone/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/zhaoliangbin42/ai-markdone/copilot-instructions.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,337 This file is loaded in full into every session.
When invoked 1,337 The same file — it is already loaded in full.
Security scan A 0 findings. 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 $0.01337 $0.01337
Opus 5 $0.00668 $0.00668
Sonnet 5 $0.00267 $0.00267
Haiku 4.5 $0.00134 $0.00134

Measured 8d ago against content hash daee12f79332, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

AI-MarkDone copilot-instructions.md scanned grade A with 0 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 8d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.github/copilot-instructions.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AI Copy Enhance - AI Coding Agent Instructions

Project Overview

Chrome Extension (Manifest V3) that enhances ChatGPT/Gemini with robust Markdown export. Extracts LaTeX from KaTeX, handles rendering failures, converts tables/code to Markdown, and provides click-to-copy math formulas.

Architecture Patterns

Adapter Pattern for Multi-Platform Support

  • Registry: src/content/adapters/registry.ts manages platform adapters
  • Base: SiteAdapter abstract class defines interface (selectors, HTML extraction, streaming detection)
  • Implementations: ChatGPTAdapter, GeminiAdapter (each 100 lines)
  • Critical: New platforms extend SiteAdapter and register in AdapterRegistry constructor
  • Adapters provide DOM selectors specific to each platform's structure

Shadow DOM Isolation

  • All UI components use Shadow DOM to avoid CSS conflicts with host pages
  • See src/content/components/toolbar.ts, modal.ts - each creates shadow root and injects styles
  • Styles defined in src/styles/*.css.ts as template literals for Shadow DOM injection
  • Toolbar: Icon-only buttons with hover tooltips, auto-updating word/char count on right
  • Never use global CSS - it won't reach Shadow DOM components

Parser Pipeline Architecture

MarkdownParser orchestrates specialized extractors in sequence:

  1. CodeExtractor: <pre><code> → fenced code blocks with language tags
  2. TableParser: HTML tables → Markdown pipes
  3. Turndown: HTML → Markdown (with custom rules for KaTeX)
  4. Post-processing: Cleanup and normalization

Critical: Math formulas are handled by Turndown rules that extract LaTeX from <annotation encoding="application/x-tex"> tags.

MutationObserver Pattern

  • src/observers/mutation-observer.ts watches for new messages with 200ms debounce
  • Uses WeakSet to track processed messages (avoid duplicate toolbars)
  • Container selection: tries multiple selectors (main, main > div, etc.) - see getObserverContainer()

Read the full file on GitHub · 106 lines

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. 8d ago First seen · 106 lines · 1,337 tokens per session scan A daee12f79332

Subscribe to this mod's changes

AI-MarkDone copilot-instructions.md is an instructions file published in the GitHub repository zhaoliangbin42/AI-MarkDone (183 stars, last pushed 12d ago), licensed MIT. It adds 1,337 tokens to every session, about $0.0067 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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