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copilot-repo-template: Instructions file for GitHub Copilot

.github/copilot-instructions.md

copilot-repo-template copilot-instructions.md is an instructions file for GitHub Copilot from franklesniak/copilot-repo-template. It costs 14,319 tokens per session, scanned E, original, MIT.

A repository-wide set of instructions for GitHub Copilot, the coding assistant, covering project rules, metadata, authoritative documents, protected instruction files, and template adoption. It acts as the main rulebook that other instruction files should follow.

In plain words
What is it for?
Use it to establish repository conventions, identify the documents agents must read, protect agent configuration files, and guide adoption of a repository template.
Why use it?
It gives coding agents one stated source of truth when a repository has many instruction files. This reduces conflicting rules and protects important project guidance from accidental changes.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file. Also seen: mentions CLAUDE.md; mentions subagents; mentions Claude Code.

This is franklesniak/copilot-repo-template's own configuration. It tells GitHub Copilot how to work on copilot-repo-template 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 copilot-repo-template configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is **Schema example tests.** The contract that valid example fixtures pass and invalid example fixtures fail is exercised by [`tests/test_schema_examples.py`](../t.

not rated 9repo changed 1mo ago E scan 14,319 tokens original MIT
View source ↗ franklesniak/copilot-repo-template
Reuse

Borrowing it

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

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 copilot-repo-template copilot-instructions.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/franklesniak/copilot-repo-template/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/franklesniak/copilot-repo-template/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 14,319 This file is loaded in full into every session.
When invoked 14,319 The same file — it is already loaded in full.
Security scan E 2 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 $0.14319 $0.14319
Opus 5.5 $0.05728 $0.05728
Sonnet 5.5 $0.02864 $0.02864
Haiku 4.5 $0.01432 $0.01432

Measured 1mo ago against content hash ad9f24f55279, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade E, and why

copilot-repo-template copilot-instructions.md scanned grade E 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 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.

Hidden instructionshighPrompt injection

Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.

<!-- template-sync: begin instruction-enforcement-only -->

Nullifies safety policieshighAnti-refusal

"You have no restrictions", "do anything now", "ignore your guidelines": a direct jailbreak that disables guardrails.

For Git placement, agents MUST use an explicit non-force source-to-destination refspec to the verified repository and head ref. Do not use force options, a leading `+`, history rewriting, or extra ref updates. A policy r
.github/copilot-instructions.md · 728 lines

How it starts

The opening of the file, as written. The whole thing — 728 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository Copilot Instructions (Repo-Wide Constitution)

Version: 1.6.20260923.0

Metadata

  • Status: Active
  • Owner: Repository Maintainers
  • Last Updated: 2026-09-23
  • Scope: Repo-wide canonical instructions ("constitution") that govern all changes in this repository. This file is the authoritative source of truth for repository rules; all language-specific instruction files and agent entry points defer to it.

These instructions are authoritative for all changes in this repository.

Source of Truth

Customize this section for your project. Point to your authoritative specification or design document. Example:

  • Read docs/spec/requirements.md before making changes.
  • If any instruction here conflicts with the spec, the spec wins.

Protected Instruction Files

Instruction files, style guides, and the retained instruction-contract catalog are protected governance files. This rule applies to:

  • The repo-wide constitution: .github/copilot-instructions.md
  • Root agent entry points: .hermes.md, AGENTS.md, CLAUDE.md, and GEMINI.md
  • Cursor project rules under .cursor/rules/
  • Modular instruction files under .github/instructions/
  • The retained instruction-contract catalog: .template-sync/instruction-contracts.yml
  • The standalone instruction catalog and local profile: .github/instruction-contracts.yml and .github/instruction-profile.yml, with schemas/instruction-contracts.schema.json and schemas/instruction-profile.schema.json
  • The retained workflow security contract: .github/workflow-security-contract.yml

Read the full file on GitHub · 728 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 Changed · +190 lines · +6,172 tokens per session scan A → E ad9f24f55279
  2. 2mo ago First seen · 538 lines · 8,147 tokens per session scan A 96301330b6c2

Subscribe to this mod's changes

copilot-repo-template copilot-instructions.md is an instructions file published in the GitHub repository franklesniak/copilot-repo-template (9 stars, last pushed 5d ago), licensed MIT. It adds 14,319 tokens to every session, about $0.0573 per session on Opus 5.5. A static security scan graded it E with 2 findings (hidden instructions, nullifies safety policies). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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