robin: Instructions file for Codex

AGENTS.md

robin AGENTS.md is an instructions file for Codex, OpenCode from antongulin/robin. It costs 2,767 tokens per session, scanned A, original, MIT.

An AGENTS.md guide for adding Robin, an automated pull-request workflow, to another GitHub repository.

In plain words
What is it for?
Configure Robin in GitHub Actions, choose a stable workflow release, provide an LLM API key and model settings, and respond to pull-request events and comments.
Why use it?
It records the supported workflow versions, required secrets, permissions, and unsafe configuration choices so the integration is less likely to fail or expose secrets.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is antongulin/robin's own configuration. It tells Codex and OpenCode how to work on robin 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 robin configures →

Reuse

Borrowing it

Nothing to install: this file belongs to antongulin/robin. 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/antongulin/robin/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/antongulin/robin

Made for: Codex, OpenCode.

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 robin AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/antongulin/robin/agents-md/github.svg)](https://agentmods.dev/instructions/antongulin/robin/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/antongulin/robin/agents-md"><img src="https://agentmods.dev/badge/instructions/antongulin/robin/agents-md/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 robin AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/antongulin/robin/agents-md"><img src="https://agentmods.dev/badge/instructions/antongulin/robin/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,767 This file is loaded in full into every session.
When invoked 2,767 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 $0.02767 $0.02767
Opus 5.5 $0.01107 $0.01107
Sonnet 5.5 $0.00553 $0.00553
Haiku 4.5 $0.00277 $0.00277

Measured today against content hash c754ff05db92, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

robin 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 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.

AGENTS.md · 222 lines

How it starts

The opening of the file, as written. The whole thing — 222 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Instructions for AI coding agents

Use this file when adding Robin to another repository.

Required workflow reference

Default (latest):

uses: antongulin/robin/.github/workflows/review.yml@main

Floating v2 workflow ref:

uses: antongulin/robin/.github/workflows/review.yml@v2

The reusable workflows at main, v2 and v2.12.4 call antongulin/robin@main internally. A workflow tag or SHA pins only that workflow, not the nested action. For a direct action step, antongulin/robin@main follows main and @v2 follows the latest v2 release; an exact action release or full SHA pins its implementation. Do not present a reusable-workflow pin as an implementation pin.

Unset agent-mode now defaults to auto (planned v2.13.0). Keep the action and workflow input defaults blank so base-branch .github/robin.yml can select off. Explicit mode input overrides that config. For weak/local/small-context models, recommend explicit off until tool behavior, quality and context capacity have been checked; fallback is bounded and can fail. See migration guidance.

Do not use

  • @v0, v0, or any v0 release tag — workflows fail or point at stale code.
  • pull_request_target — not supported; security risk with secrets.
  • synchronize on pull_request unless the user explicitly wants review on every push.

Required secrets (in the consumer repo)

Secret Purpose
LLM_API_KEY Provider API key
LLM_BASE_URL OpenAI-compatible base URL
LLM_MODEL Model id

Optional custom identity: reusable-workflow callers may pass ROBIN_TOKEN. Omitted or empty keeps github.token; do not add it to default installer templates. GitHub App examples must create and use their token in the same job via the direct action, never pass a masked token through job outputs. See Custom review identity.

Free OpenRouter example:

  • LLM_BASE_URL: https://openrouter.ai/api/v1
  • LLM_MODEL: openrouter/free

Read the full file on GitHub · 222 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. today Changed · +32 lines · +567 tokens per session c754ff05db92
  2. yesterday Changed · +5 lines · +75 tokens per session fe4d990e06a3
  3. 9d ago Changed · +7 lines · +100 tokens per session d7d0df154e93
  4. 14d ago Changed · +9 lines · +223 tokens per session c72c592c6b41
  5. 15d ago Changed · +10 lines · +193 tokens per session 14763a395a36
  6. 23d ago Changed · +10 lines · +151 tokens per session 7791adf403de
  7. 29d ago Changed · +45 lines · +676 tokens per session 74dde73fcf54
  8. 2mo ago First seen · 104 lines · 782 tokens per session scan A d701ecf4e57e

Subscribe to this mod's changes

robin AGENTS.md is an instructions file published in the GitHub repository antongulin/robin (49 stars, last pushed today), licensed MIT. It adds 2,767 tokens to every session, about $0.0111 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 2026-08-30.

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