agentmods.dev

coding-agent-runner: Instructions file for Codex

AGENTS.md

coding-agent-runner AGENTS.md is an instructions file for Codex, OpenCode from yinguangyao/coding-agent-runner. It costs 864 tokens per session, scanned A, original, MIT.

Repository instructions for coding-agent-runner, a Node.js package that lets applications run local coding-agent command-line tools such as Codex, Claude Code, Cursor, OpenCode, and Pi.

In plain words
What is it for?
Use them when developing or changing the runner, its provider integrations, tests, and APIs such as detecting agents or streaming their output.
Why use it?
They clarify the package’s boundaries and public interfaces, helping contributors avoid adding unrelated application code, provider login, billing, or credential handling.

Instructions file for CodexOpenCode

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

This is yinguangyao/coding-agent-runner's own configuration. It tells Codex and OpenCode how to work on coding-agent-runner 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 coding-agent-runner configures →

not rated 24repo 3mo ago A scan 864 tokens original MIT
View source ↗ yinguangyao/coding-agent-runner
Reuse

Borrowing it

Nothing to install: this file belongs to yinguangyao/coding-agent-runner. 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/yinguangyao/coding-agent-runner/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/yinguangyao/coding-agent-runner

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 coding-agent-runner AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/yinguangyao/coding-agent-runner/agents-md"><img src="https://agentmods.dev/badge/instructions/yinguangyao/coding-agent-runner/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 864 This file is loaded in full into every session.
When invoked 864 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 $0.00864 $0.00864
Opus 5.5 $0.00346 $0.00346
Sonnet 5.5 $0.00173 $0.00173
Haiku 4.5 $0.00086 $0.00086

Measured 1mo ago against content hash c9f271b22ad1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

coding-agent-runner 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 1mo 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.

AGENTS.md · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md - coding-agent-runner

Project

coding-agent-runner is a Node.js package for running local coding-agent CLIs from application code.

Supported providers:

  • codex / codex-cli: Codex app-server over stdio JSON-RPC.
  • claude / claude-code-cli: Claude Code native stream-json.
  • cursor / cursor-cli: Cursor Agent over ACP.
  • opencode / opencode-cli: OpenCode over ACP.
  • pi / pi-cli: Pi ACP.

Boundaries

  • Do not import AI Workbench code, Electron code, server code, database code, or app-specific task queues.
  • Keep this package Node-only and publishable as a standalone npm package.
  • Do not add provider installation, login, credential storage, billing, UI, or sandbox policy.
  • Do not require real provider credentials in tests or CI.
  • Keep provider protocol code behind small public APIs and package-owned types.

Public API

Friendly APIs use short provider ids:

  • detectCliAgents()
  • createCodingAgentRunner()
  • streamCliAgent()
  • runCliAgent()

Top-level runner options include model, systemPrompt, mcpServers, and skills. Keep provider-specific mappings covered by tests when changing them:

  • Codex maps mcpServers to app-server config.mcp_servers and sends skills as structured skill input blocks plus developerInstructions skill references.
  • Claude maps mcpServers to --mcp-config; skill references are appended to the system prompt.
  • ACP providers pass mcpServers through session setup; skill references are wrapped into the fallback system prompt.

Lower-level APIs remain exported for advanced callers:

  • runAgentTurn()
  • runCodexTurn() / acquireCodexAppServer()
  • runClaudeNative()
  • AcpConnection
  • mapStreamEventToAgentEvents()
  • buildDefaultSpawn() / listProviderConfigs()

Development

Use npm, not yarn or pnpm, in this repository.

Run local verification before claiming completion:

npm run typecheck
npm test
npm run build
npm pack --dry-run

npm run check runs typecheck, tests, and build. It does not run npm pack --dry-run, so run pack separately before release-related changes.

Read the full file on GitHub · 94 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. 1mo ago First seen · 94 lines · 864 tokens per session scan A c9f271b22ad1

Subscribe to this mod's changes

coding-agent-runner AGENTS.md is an instructions file published in the GitHub repository yinguangyao/coding-agent-runner (24 stars, last pushed 3mo ago), licensed MIT. It adds 864 tokens to every session, about $0.0035 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.

Building agentsClaude Codeacpagent-client-protocolai-agentscli-wrappercodex
Related

Other instructions, from other repositories

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).

microsoft/vscode · 9,715 tokens

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.

vercel/next.js · 7,461 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).

microsoft/vscode · 5,262 tokens

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.

langchain-ai/langchain · 4,680 tokens

vscode copilot-instructions.md

Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).

microsoft/vscode · 2,731 tokens

vscode model-prompts.instructions.md

Model-specific prompt authoring and registry guidelines.

microsoft/vscode · 2,022 tokens