ossec: Instructions file for GitHub Copilot

.github/copilot-instructions.md

ossec copilot-instructions.md is an instructions file for GitHub Copilot from sous-chefs/ossec. It costs 1,017 tokens per session, scanned A, a copy of postfix copilot-instructions.md, Apache-2.0.

Project instructions for a Sous Chefs Chef cookbook, including its Ruby code, file layout, setup, and tests. Chef cookbooks are files that automate software installation and system configuration.

In plain words
What is it for?
Use them when editing recipes, resources, configuration, templates, or tests in the cookbook.
Why use it?
They show the agent how this cookbook is organized and how to check changes across supported systems.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is sous-chefs/ossec's own configuration. It tells GitHub Copilot how to work on ossec 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 ossec configures →

Reuse

Borrowing it

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

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 ossec copilot-instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/sous-chefs/ossec/copilot-instructions/github.svg)](https://agentmods.dev/instructions/sous-chefs/ossec/copilot-instructions)
Your own site
<a href="https://agentmods.dev/instructions/sous-chefs/ossec/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/sous-chefs/ossec/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.

agentmods 80×15 button for ossec copilot-instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/sous-chefs/ossec/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/sous-chefs/ossec/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,017 This file is loaded in full into every session.
When invoked 1,017 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 92% copy Near-identical to another mod 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 $0.01017 $0.01017
Opus 5.5 $0.00407 $0.00407
Sonnet 5.5 $0.00203 $0.00203
Haiku 4.5 $0.00102 $0.00102

Measured 1mo ago against content hash dff33dcc80aa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ossec 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 1mo 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.

Origin

This is a copy

92% identical to postfix copilot-instructions.md — 10 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.github/copilot-instructions.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Copilot Instructions for Sous Chefs Cookbooks

Repository Overview

Chef cookbook for managing software installation and configuration. Part of the Sous Chefs cookbook ecosystem.

Key Facts: Ruby-based, Chef >= 16 required, supports various OS platforms (check metadata.rb, kitchen.yml and .github/workflows/ci.yml for which platforms to specifically test)

Project Structure

Critical Paths:

  • recipes/ - Chef recipes for cookbook functionality (if this is a recipe-driven cookbook)
  • resources/ - Custom Chef resources with properties and actions (if this is a resource-driven cookbook)
  • spec/ - ChefSpec unit tests
  • test/integration/ - InSpec integration tests (tests all platforms supported)
  • test/cookbooks/ or test/fixtures/ - Example cookbooks used during testing that show good examples of custom resource usage
  • attributes/ - Configuration for recipe driven cookbooks (not applicable to resource cookbooks)
  • libraries/ - Library helpers to assist with the cookbook. May contain multiple files depending on complexity of the cookbook.
  • templates/ - ERB templates that may be used in the cookbook
  • files/ - files that may be used in the cookbook
  • metadata.rb, Policyfile.rb - Cookbook dependency resolution

Build and Test System

Environment Setup

MANDATORY: Install Chef Workstation first - provides chef, cookstyle, kitchen tools.

Essential Commands (strict order)

chef install Policyfile.rb                   # Install dependencies (always first)
cookstyle                       # Ruby/Chef linting
yamllint .                      # YAML linting
markdownlint-cli2 '**/*.md'     # Markdown linting
chef exec rspec                 # Unit tests (ChefSpec)
# Integration tests will be done via the ci.yml action. Do not run these. Only check the action logs for issues after CI is done running.

Critical Testing Details

  • Kitchen Matrix: Multiple OS platforms × software versions (check kitchen.yml for specific combinations)
  • Docker Required: Integration tests use Dokken driver
  • CI Environment: Set CHEF_LICENSE=accept-no-persist
  • Full CI Runtime: 30+ minutes for complete matrix

Read the full file on GitHub · 96 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. 1mo ago First seen · 96 lines · 1,017 tokens per session scan A dff33dcc80aa

Subscribe to this mod's changes

ossec copilot-instructions.md is an instructions file published in the GitHub repository sous-chefs/ossec (46 stars, last pushed 8d ago), licensed Apache-2.0. It adds 1,017 tokens to every session, about $0.0041 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to postfix copilot-instructions.md, differing in 10 lines, and is treated as a copy.

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