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rn-agent-observer: Instructions file for Codex

AGENTS.md

rn-agent-observer AGENTS.md is an instructions file for Codex, OpenCode from GinzaTech/rn-agent-observer. It costs 1,222 tokens per session, scanned A, original, Apache-2.0.

Project instructions for developing the React Native Agent Observer, a tool for inspecting running React Native and Expo apps on Android. They describe commands, workspace areas, requirements, and development constraints.

In plain words
What is it for?
Use them when changing or checking the observer project, including its device logic, shared schemas, instrumentation, CLI, and MCP components.
Why use it?
They give the agent the project-specific rules and commands needed to build, test, and use the repository correctly.

Instructions file for CodexOpenCode

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

This is GinzaTech/rn-agent-observer's own configuration. It tells Codex and OpenCode how to work on rn-agent-observer 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 rn-agent-observer configures →

not rated 0repo 5d ago A scan 1,222 tokens original Apache-2.0
View source ↗ GinzaTech/rn-agent-observer
Reuse

Borrowing it

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

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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Your own site
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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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<a href="https://agentmods.dev/instructions/ginzatech/rn-agent-observer/agents-md"><img src="https://agentmods.dev/badge/instructions/ginzatech/rn-agent-observer/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,222 This file is loaded in full into every session.
When invoked 1,222 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 $0.01222 $0.01222
Opus 5.5 $0.00489 $0.00489
Sonnet 5.5 $0.00244 $0.00244
Haiku 4.5 $0.00122 $0.00122

Measured 2mo ago against content hash 728c95e8e337, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rn-agent-observer 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 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.

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 · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

RN Agent Observer instructions

Observer runtime cục bộ cho React Native/Expo, built-in target Android; Windows là host phát triển đã verify. Yêu cầu Node >= 22.12, pnpm 9.6, adb khả dụng.

Lệnh chính

  • pnpm check = lint -> format:check -> build -> test; chạy sau mọi thay đổi.
  • Một package: pnpm --filter @rn-agent-observer/core test (tương tự với build).
  • Một file test: pnpm --filter @rn-agent-observer/core test -- <file-hoặc-pattern> (vitest nhận positional filter).
  • pnpm rn-observe, pnpm mcp:check, pnpm mcp:start chạy thẳng packages/*/dist — phải pnpm build trước khi dùng CLI/MCP sau khi sửa source.
  • devtools-export cần Metro chạy cho đúng app + adb reverse tcp:8081 tcp:8081 (hoặc RN_OBSERVER_METRO_URL); không mở React Native DevTools song song. Với app không instrumentation, dùng app-state/device-network làm fallback.

Bản đồ workspace

  • packages/schemas — Zod schemas + shared types, không chứa logic runtime.
  • packages/core — toàn bộ device/runtime logic (ADB, parser, session, diagnosis, comparison). CLI và MCP là adapter mỏng; không đưa logic vào adapter.
  • packages/rn-instrumentation — telemetry development-only gắn vào app được quan sát (route, fetch, render, long JS task).
  • apps/demo-expo — fixture dogfood, app ID dev.rnagentobserver.demo.
  • Hướng phụ thuộc: schemas <- core <- cli/mcp-server; demo-expo dùng rn-instrumentation.

Ràng buộc code

  • TypeScript strict + noUncheckedIndexedAccess + exactOptionalPropertyTypes (tsconfig.base.json).
  • ESLint chạy --max-warnings=0; no-explicit-any và consistent-type-imports là error.
  • Prettier: single quote, semicolon, trailing comma all; format check nằm trong pnpm check, chạy pnpm format để sửa.
  • Chỉ dùng pnpm; không tạo lockfile npm/Yarn/Bun.

Fixture demo (đừng "sửa")

  • PerformanceLab chặn JS 100ms một cách có chủ ý làm regression fixture; không tối ưu hóa.
  • NetworkLab dùng fixture nội bộ (0/500/2000ms, HTTP 503), không phụ thuộc Internet.

Read the full file on GitHub · 68 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 · 68 lines · 1,222 tokens per session scan A 728c95e8e337

Subscribe to this mod's changes

rn-agent-observer AGENTS.md is an instructions file published in the GitHub repository GinzaTech/rn-agent-observer (0 stars, last pushed 5d ago), licensed Apache-2.0. It adds 1,222 tokens to every session, about $0.0049 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 2026-08-31.

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