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rails_ai_agents: Instructions file for GitHub Copilot

.github/copilot-instructions.md

rails_ai_agents copilot-instructions.md is an instructions file for GitHub Copilot from ThibautBaissac/rails_ai_agents. It costs 273 tokens per session, scanned A, original, MIT.

A set of instructions that lets GitHub Copilot use this Rails project's existing rules, skills, and architecture guidance.

In plain words
What is it for?
It helps configure Copilot instruction bridges, mirror skills, and keep those copies synchronized as the project changes.
Why use it?
It keeps Copilot aligned with the project's canonical documentation instead of maintaining separate, potentially conflicting instructions.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file. Also seen: reads .claude/ paths; mentions AGENTS.md.

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

not rated 672repo +1 5mo ago A scan 273 tokens original MIT
View source ↗ ThibautBaissac/rails_ai_agents thibautbaissac.github.io
Reuse

Borrowing it

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

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 rails_ai_agents copilot-instructions.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/thibautbaissac/rails_ai_agents/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/thibautbaissac/rails_ai_agents/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 273 This file is loaded in full into every session.
When invoked 273 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 $0.00273 $0.00273
Opus 5.5 $0.00109 $0.00109
Sonnet 5.5 $0.00055 $0.00055
Haiku 4.5 $0.00027 $0.00027

Measured 2mo ago against content hash bb44b42cae0d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rails_ai_agents 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 · 34 lines

What it actually says

GitHub Copilot Instructions

Use these instructions as a compatibility bridge so GitHub Copilot can reuse this repo's Claude-oriented assets without duplicating them.

Canonical Sources

  • Architecture and workflow conventions: AGENTS.md
  • Canonical Claude instructions and rules: .claude/
  • Copilot-friendly mirrored skills: .agents/skills/

Rule Loading Strategy

  • Path-scoped Copilot bridge files live in .github/instructions/claude-rules/.
  • Each bridge points to a canonical .claude/rules/*.md file.
  • Follow the canonical .claude/rules/*.md content, not the bridge text.

Skills Strategy

  • Treat .agents/skills/*/SKILL.md as Copilot-facing skills.
  • .claude/skills/ remains the source of truth.

Maintenance Rules

  • Do not rewrite or duplicate .claude/rules/* content into .github/instructions/*.
  • Do not manually copy .claude/skills/* into .agents/skills/*.
  • Keep bridges and mirrors in sync via scripts:
scripts/sync_claude_rules_to_copilot.sh
scripts/sync_claude_skills_to_codex.sh

Run both scripts after adding, removing, or renaming a rule or skill.

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 · 34 lines · 273 tokens per session scan A bb44b42cae0d

Subscribe to this mod's changes

rails_ai_agents copilot-instructions.md is an instructions file published in the GitHub repository ThibautBaissac/rails_ai_agents (672 stars, last pushed 5mo ago), licensed MIT. It adds 273 tokens to every session, about $0.0011 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 2026-09-03.

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