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rayfin: Instructions file for GitHub Copilot

.github/instructions/rush.instructions.md

rayfin rush.instructions.md is an instructions file for GitHub Copilot from microsoft/rayfin. It costs 1,545 tokens per session, scanned A, original, MIT.

Repository-specific instructions for Rush, a tool for managing JavaScript and TypeScript monorepos, where one repository contains multiple related packages. They describe configuration files, isolated subspaces, project groups, and command conventions.

In plain words
What is it for?
Use them when working on Rayfin's packages, command-line tools, samples, documentation site, or end-to-end tests through Rush.
Why use it?
They help commands run against the correct package group and dependency setup. This reduces mistakes in a repository with several independently managed areas.

Instructions file for GitHub Copilot ✓ vendor

Written for GitHub Copilot: a Copilot instructions file.

This is microsoft/rayfin's own configuration. It tells GitHub Copilot how to work on rayfin 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 rayfin configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is node common/scripts/install-run-rush.js <command>.

not rated 641repo +3 3d ago A scan 1,545 tokens original MIT
View source ↗ microsoft/rayfin
About the project

Rayfin is a managed Backend-as-a-Service platform that creates and operates application backends from data models defined with TypeScript decorators. It provides databases, authentication, APIs, storage, and hosting for teams building applications. Its catalogue skill and plugin help coding agents create and work with Rayfin projects.

microsoft/rayfin · 641 stars · on GitHub

Reuse

Borrowing it

Nothing to install: this file belongs to microsoft/rayfin. 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/microsoft/rayfin/main/.github/instructions/rush.instructions.md
Clone the repo
git clone --depth 1 https://github.com/microsoft/rayfin

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 rayfin rush.instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/microsoft/rayfin/rush/github.svg)](https://agentmods.dev/instructions/microsoft/rayfin/rush)
Your own site
<a href="https://agentmods.dev/instructions/microsoft/rayfin/rush"><img src="https://agentmods.dev/badge/instructions/microsoft/rayfin/rush/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 rayfin rush.instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/microsoft/rayfin/rush"><img src="https://agentmods.dev/badge/instructions/microsoft/rayfin/rush.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,545 This file is loaded in full into every session.
When invoked 1,545 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 $0.01545 $0.01545
Opus 5.5 $0.00618 $0.00618
Sonnet 5.5 $0.00309 $0.00309
Haiku 4.5 $0.00154 $0.00154

Measured 8d ago against content hash e30815fbf247, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rayfin rush.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/instructions/rush.instructions.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Rush monorepo expert for the Rayfin project. Assist with Rush tasks following project conventions.

1. Configuration Files

2. Subspaces

Rayfin uses four subspaces for isolated dependency management:

  • default: SDK packages (@microsoft/rayfin-* under packages/typescript-sdk/)
  • rayfin-cli: CLI, MCP, docs tooling, package-doc projects, and E2E tests (@microsoft/rayfin-cli, rayfin-cli-e2e, @microsoft/create-rayfin, @microsoft/rayfin-mcp, @microsoft/rayfin-docs, @microsoft/rayfin-guide, @microsoft/rayfin-host-docs, @microsoft/rayfin-tools-common)
  • samples: Sample apps (todo-app, eshop, events-app under samples/)
  • docs: Docusaurus site (docs/site)

Each subspace has independent pnpm-lock.yaml and common-versions.json in common/config/subspaces/<name>/.

3. Project Categories

Projects organized under projectFolderMaxDepth: 3:

  • packages/typescript-sdk/: SDK packages (auth, client, core, data, functions, storage, lib)
  • packages/tools/: CLI, MCP, docs library, and shared tooling (cli, cli-e2e, create-rayfin, mcp, docs-lib)
  • packages/guide/, packages/host-docs/: package-owned docs discovered through the rayfinDocs package.json convention
  • samples/: Sample applications (not published)
  • docs/site/: Docusaurus documentation site (Contributor tooling, not published)

View all projects in rush.json under "projects" field.

4. Command Usage

4.1 Command Tools

Read the full file on GitHub · 153 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 · 153 lines · 1,545 tokens per session scan A e30815fbf247

Subscribe to this mod's changes

rayfin rush.instructions.md is an instructions file published in the GitHub repository microsoft/rayfin (641 stars, last pushed 3d ago), licensed MIT. It adds 1,545 tokens to every session, about $0.0062 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 2026-10-09.

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