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.
curl -O https://raw.githubusercontent.com/ThibautBaissac/rails_ai_agents/main/AGENTS.mdgit clone --depth 1 https://github.com/ThibautBaissac/rails_ai_agentsWrote 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.
[](https://agentmods.dev/instructions/thibautbaissac/rails_ai_agents/agents-md)<a href="https://agentmods.dev/instructions/thibautbaissac/rails_ai_agents/agents-md"><img src="https://agentmods.dev/badge/instructions/thibautbaissac/rails_ai_agents/agents-md.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00798 | $0.00798 |
| Opus 5 | $0.00399 | $0.00399 |
| Sonnet 5 | $0.00160 | $0.00160 |
| Haiku 4.5 | $0.00080 | $0.00080 |
Grade A, and why
rails_ai_agents AGENTS.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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Project Configuration
Tech Stack
- Ruby 3.3, Rails 8.1, PostgreSQL
- Frontend: Hotwire (Turbo + Stimulus), Tailwind CSS 4, ViewComponent
- Testing: RSpec, FactoryBot, Shoulda Matchers, Capybara
- Auth:
has_secure_password(Rails 8 built-in), Pundit (authorization) - Background Jobs: Solid Queue (database-backed, no Redis)
- Caching: Solid Cache | WebSockets: Solid Cable
- Assets: Propshaft + Import Maps (no Node.js)
- Deployment: Kamal 2 + Thruster
Architecture
app/
controllers/ # Thin. Delegates to services. Renders responses.
models/ # Persistence: validations, associations, scopes, simple predicates.
views/ # ERB markup only. No logic.
services/ # Business logic. Orchestrates models, APIs, side effects.
queries/ # Complex database queries. Returns relations or hashes.
forms/ # Multi-model form objects.
policies/ # Pundit authorization. Default deny.
presenters/ # View formatting (SimpleDelegator).
components/ # ViewComponents (reusable UI with tests).
jobs/ # Background jobs (Solid Queue). Must be idempotent.
mailers/ # Email delivery. Always HTML + text templates.
Key Commands
# Tests
bundle exec rspec # Full suite
bundle exec rspec spec/path/to_spec.rb # Specific file
bundle exec rspec spec/path/to_spec.rb:25 # Specific line
# Linting
bundle exec rubocop -a # Auto-fix Ruby
bundle exec rubocop -a app/models/ # Specific directory
# Security
bin/brakeman --no-pager # Static analysis
bundle exec bundler-audit check --update # Gem vulnerabilities
# Database
bin/rails db:migrate # Run migrations
bin/rails db:migrate:status # Check status
bin/rails console # Interactive console
Development Workflow
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.
- 4d ago First seen · 82 lines · 798 tokens per session scan A 700ab6ae2436
rails_ai_agents AGENTS.md is an instructions file published in the GitHub repository ThibautBaissac/rails_ai_agents (659 stars, last pushed 3mo ago), licensed MIT. It adds 798 tokens to every session, about $0.0040 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 2026-09-03.
Other instructions, from other repositories
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.