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mcp-async: Instructions file for GitHub Copilot

.github/copilot-instructions.md

mcp-async copilot-instructions.md is an instructions file for GitHub Copilot from mako10k/mcp-async. It costs 423 tokens per session, scanned A, original, MIT.

Project instructions for building an MCP server that proxies existing MCP servers and runs their tools asynchronously. Asynchronous work continues in the background while the agent receives a handle for checking its status later.

In plain words
What is it for?
Use it when developing or maintaining the MCP Async Bridge Server, including its proxy, task manager, timeout handling, status checks, and cancellation tools.
Why use it?
It describes how to avoid waiting indefinitely for slow tool calls and how to manage unfinished work, timeouts, and cancellation.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is mako10k/mcp-async's own configuration. It tells GitHub Copilot how to work on mcp-async 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 mcp-async configures →

not rated 0repo 1y ago A scan 423 tokens original MIT
View source ↗ mako10k/mcp-async
Reuse

Borrowing it

Nothing to install: this file belongs to mako10k/mcp-async. 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/mako10k/mcp-async/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/mako10k/mcp-async

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.

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/mako10k/mcp-async/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/mako10k/mcp-async/copilot-instructions/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/mako10k/mcp-async/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/mako10k/mcp-async/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 423 This file is loaded in full into every session.
When invoked 423 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 $0.00423 $0.00423
Opus 5.5 $0.00169 $0.00169
Sonnet 5.5 $0.00085 $0.00085
Haiku 4.5 $0.00042 $0.00042

Measured 2mo ago against content hash 2f67e49ee64b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-async 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 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.

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 · 31 lines

What it actually says

MCP Async Bridge Server Instructions

このプロジェクトは、既存のMCPサーバをブリッジし、非同期処理機能を追加するMCPサーバです。

プロジェクト要件

  • TypeScriptベースのMCPサーバ実装
  • 既存MCPサーバへのプロキシ機能
  • すべてのツールに sync パラメータを追加（デフォルト：async）
  • 1秒タイムアウト処理とハンドル返却機能
  • 非同期ツール管理機能（一覧、詳細取得、キャンセル）

機能設計

  1. 非同期化 - すべてのツールにsyncパラメータ追加
  2. タイムアウト処理 - 1秒で応答がない場合はハンドル返却
  3. 状況確認ツール - 未回収応答管理、実行状況確認、キャンセル機能

実装済み機能

  • プロジェクト構造とビルド環境
  • TypeScript + MCP SDK セットアップ
  • TargetServerProxy（既存MCPサーバーへのプロキシ）
  • TaskManager（非同期タスク管理）
  • TimeoutHandler（タイムアウト処理）
  • AsyncBridgeServer（メインブリッジサーバー）
  • 管理ツール（list/get/cancel）
  • テスト用サーバー例

アーキテクチャ

  • AsyncBridgeServer: メインのMCPサーバー
  • TargetServerProxy: 既存MCPサーバーとの通信
  • TaskManager: 非同期タスクのライフサイクル管理
  • TimeoutHandler: タイムアウト処理とハンドル管理
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 · 31 lines · 423 tokens per session scan A 2f67e49ee64b

Subscribe to this mod's changes

mcp-async copilot-instructions.md is an instructions file published in the GitHub repository mako10k/mcp-async (0 stars, last pushed 1y ago), licensed MIT. It adds 423 tokens to every session, about $0.0017 per session on Opus 5.5. 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 2026-08-31.

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