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/.github/copilot-instructions.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/copilot-instructions)<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="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 | $0.00273 | $0.00273 |
| Opus 5 | $0.00137 | $0.00137 |
| Sonnet 5 | $0.00055 | $0.00055 |
| Haiku 4.5 | $0.00027 | $0.00027 |
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 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.
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/*.mdfile. - Follow the canonical
.claude/rules/*.mdcontent, not the bridge text.
Skills Strategy
- Treat
.agents/skills/*/SKILL.mdas 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.
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 · 34 lines · 273 tokens per session scan A bb44b42cae0d
rails_ai_agents copilot-instructions.md is an instructions file published in the GitHub repository ThibautBaissac/rails_ai_agents (659 stars, last pushed 3mo ago), licensed MIT. It adds 273 tokens to every session, about $0.0014 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.
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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).
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).
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.