What is rails-ai-bridge copilot-instructions.md?

A high-level Copilot instruction file describing a Rails application's structure, conventions, and safety rules.

Use it when Copilot writes or edits Rails models, controllers, routes, or related application code.

It gives Copilot verified project context and tells it to inspect the application before inventing columns, routes, inheritance, or dependencies.

rails-ai-bridge copilot-instructions.md — Instructions file for GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/igmarin/rails-ai-bridge

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/igmarin/rails-ai-bridge/copilot-instructions/github.svg)](https://agentmods.dev/instructions/igmarin/rails-ai-bridge/copilot-instructions)

Your own site

<a href="https://agentmods.dev/instructions/igmarin/rails-ai-bridge/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/igmarin/rails-ai-bridge/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/igmarin/rails-ai-bridge/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/igmarin/rails-ai-bridge/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,820 This file is loaded in full into every session.

When invoked 1,820 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.

Model	Per session	Once invoked
Fable 5.1	$0.01820	$0.01820
Opus 5	$0.00910	$0.00910
Sonnet 5	$0.00364	$0.00364
Haiku 4.5	$0.00182	$0.00182

Measured today against content hash e1364ddd7b7d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-15, from the pricing page.

Security

Grade A, and why

rails-ai-bridge 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 today.

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.

examples/demo_app/.github/copilot-instructions.md · 137 lines

How it starts

The opening of the file, as written. The whole thing — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.

DemoApp — Copilot Context

Auto-generated by rails-ai-bridge v5.2.0 Generated: 2026-09-15T03:10:26Z Rails 8.1.3.1 | Ruby 4.0.7

This file provides a high-level overview of this Rails application's structure, patterns, and conventions. As an AI assistant, use this context to quickly understand the project and generate idiomatic code that adheres to its design decisions. For deeper dives, use the live MCP tools referenced throughout this document.

Anti-hallucination rules

Verify before you write (column, association, route, helper, gem).
Mark assumptions with [ASSUMPTION]. Silent guesses are forbidden.
This app is not average Rails. Query conventions and gems before scaffolding.
Check the inheritance chain (filters, concerns, STI) before editing a controller or model.
Empty tool output is information, not permission to invent.
Re-query after writes. Stale tool output lies.

Engineering rules (read first)

Defaults for this codebase unless existing files clearly show a different pattern.

Controllers & strong parameters

Permit attributes explicitly; never pass raw params into Model.new, update, or assign_attributes.
Extend permit lists deliberately when adding fields; mirror neighboring actions in the same controller.

Authentication & authorization

Guard mutating and sensitive reads with the app's existing auth (e.g. before_action filters, policies). A public route does not imply public data.
Use rails_get_controllers for filters and rails_get_conventions for architecture hints when unsure.

Data access & performance

Avoid N+1: use includes / preload / eager_load for associations used in views or serializers.
Do not load unbounded collections: paginate list endpoints, use find_each in jobs, stream large exports.
Large or hot tables: check indexes before new WHERE/ORDER BY; use rails_get_schema before heavy queries.

Read the full file on GitHub · 137 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.

today First seen · 137 lines · 1,820 tokens per session scan A e1364ddd7b7d

Subscribe to this mod's changes

rails-ai-bridge copilot-instructions.md is an instructions file published in the GitHub repository igmarin/rails-ai-bridge (14 stars, last pushed today), licensed MIT. It adds 1,820 tokens to every session, about $0.0091 per session on Opus 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 2026-09-15.

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Instructions for KhazP/vibe-coding-prompt-template: Read AGENTS.md, agentdocs/techstack.md, and agentdocs/codepatterns.md.

KhazP/vibe-coding-prompt-template · 139 tokens

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

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rails-ai-bridge copilot-instructions.md