rover: Instructions file for Codex

AGENTS.md

rover AGENTS.md is an instructions file for Codex, OpenCode from endorhq/rover. It costs 2,138 tokens per session, scanned A, original, Apache-2.0.

Instructions for Rover, a TypeScript monorepo—a repository containing multiple related packages—covering its structure and development commands. The packages include a command-line tool, a VS Code extension, and a telemetry library.

In plain words
What is it for?
Use them when developing Rover, running all packages together, or working on its CLI, extension, or telemetry package.
Why use it?
They explain how the packages fit together and which commands build, test, check, lint, or run the whole workspace.

Instructions file for CodexOpenCode

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

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

Reuse

Borrowing it

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

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.

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README.md
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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.

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Per session 2,138 This file is loaded in full into every session.
When invoked 2,138 The same file — it is already loaded in full.
Security scan A 1 finding. 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 $0.02138 $0.02138
Opus 5.5 $0.00855 $0.00855
Sonnet 5.5 $0.00428 $0.00428
Haiku 4.5 $0.00214 $0.00214

Measured 2mo ago against content hash 37d8cab0d0aa, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rover AGENTS.md scanned grade A with 1 finding 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

**Always use `launch` (async) and `launchSync` from `packages/core/src/os.ts` to spawn processes. Do not use the Node.js `child_process` API directly.**
AGENTS.md · 258 lines

How it starts

The opening of the file, as written. The whole thing — 258 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file provides guidance to AI agents (Claude Code, Cursor, etc.) when working with code in this repository.

Project Overview

Rover is a TypeScript-based workspace that helps developers and AI agents spin up services instantly. The project is organized as a monorepo with multiple packages, each serving different purposes in the Rover ecosystem.

Repository Structure

rover/
├── packages/
│   ├── cli/          # Main CLI tool (TypeScript)
│   ├── extension/    # VS Code extension (TypeScript)
│   └── telemetry/    # Telemetry library (TypeScript)
├── package.json      # Root workspace configuration
└── AGENTS.md        # This file

Essential Development Commands

Workspace Commands (run from root)

# Development workflow
pnpm dev              # Start all packages in development mode

# Building
pnpm build            # Build all packages

# Testing
pnpm test             # Run tests for all packages

# Type checking
pnpm check            # TypeScript type checking for all packages

# Linting & Formatting
pnpm lint             # Lint all files (with auto-fix)
pnpm format           # Format all files

Package-Specific Commands

# CLI package (packages/cli/)
cd packages/cli
pnpm dev           # Development mode with watch
pnpm build         # Type-check and build
pnpm check         # TypeScript type checking
pnpm test          # Run tests with Vitest
pnpm test:watch    # Run tests in watch mode
pnpm test:ui       # Open Vitest UI
pnpm test:coverage # Run tests with coverage

# Extension package (packages/extension/)
cd packages/extension
pnpm compile       # Compile TypeScript
pnpm watch         # Watch mode for development
pnpm package       # Build for production
pnpm test          # Run VS Code extension tests

# Telemetry package (packages/telemetry/)
cd packages/telemetry
pnpm dev           # Development mode with watch
pnpm build         # Build for production
pnpm check         # TypeScript type checking

Read the full file on GitHub · 258 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. 2mo ago First seen · 258 lines · 2,138 tokens per session scan A 37d8cab0d0aa

Subscribe to this mod's changes

rover AGENTS.md is an instructions file published in the GitHub repository endorhq/rover (273 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 2,138 tokens to every session, about $0.0086 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

rover AGENTS.md compared with instructions from other repositories

rover AGENTS.md next to 6 instructions from other repositories
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rover AGENTS.mdendorhq/roverInstructions file2737mo agoApache-2.0A2,138Codex, OpenCode
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langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode