What is Hermes3D AGENTS.md?

Repository instructions for Hermes3D, a Next.js frontend that displays a 3D interface and communicates with a separate Hermes backend through a WebSocket connection. They describe the project structure, development commands, and testing checks.

Use them when changing Hermes3D, starting its development server, running its Hermes adapter, checking Node.js requirements, or performing lint, type-check, and test work.

They clarify which code belongs in the frontend and which backend services must be treated as external. This helps prevent changes to the wrong system and gives developers the expected way to run and verify the app.

Hermes3D AGENTS.md — Instructions file for Codex and OpenCode by iamlukethedev: Repository instructions for Hermes3D, a Next.js frontend tha

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add instructions/iamlukethedev/hermes3d/agents-md

Clone the repo

git clone --depth 1 https://github.com/iamlukethedev/Hermes3D

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/iamlukethedev/hermes3d/agents-md.svg)](https://agentmods.dev/instructions/iamlukethedev/hermes3d/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/iamlukethedev/hermes3d/agents-md"><img src="https://agentmods.dev/badge/instructions/iamlukethedev/hermes3d/agents-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 577 This file is loaded in full into every session.

When invoked 577 The same file — it is already loaded in full.

Security scan A 0 findings. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5	$0.00577	$0.00577
Opus 5	$0.00289	$0.00289
Sonnet 5	$0.00115	$0.00115
Haiku 4.5	$0.00058	$0.00058

Measured 5d ago against content hash 23a965de51b8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Hermes3D 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 5d 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 · 42 lines

How it starts

The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Instructions

Keep repository instructions generic and safe for open source.

This repo is the Hermes3D frontend. It talks to the Hermes backend over the gateway WebSocket protocol and does not contain the backend itself.

When the user asks for changes, they are asking for changes to this app. Apply solutions here, and treat the gateway protocol and the Hermes HTTP API as external contracts you read rather than edit.

If you use local private overlay instructions, keep them outside the repository and do not commit them here.

Do not commit personal, environment-specific, or secret instructions to this repository.

Development environment instructions

Service overview

Hermes3D is a Next.js 16 frontend (TypeScript, React 19, Three.js, Phaser) for the Hermes backend. It runs a custom Node.js server (server/index.js) that bundles a same-origin WebSocket proxy to the upstream gateway. No database or Docker is required. The only hard system dependency is Node.js 20+ with npm 10+.

Running the app

npm run dev starts the dev server on port 3000 via the custom server (node server/index.js --dev).
npm run hermes-adapter starts the bundled Hermes gateway adapter (server/hermes-gateway-adapter.js) on ws://localhost:18789. npm run demo-gateway starts the mock gateway instead.
The app requires a running gateway to show agent data. Without one, the UI loads but shows the gateway connection form. This is expected and not an error.
.env is copied from .env.example; see README.md "Configuration" for variable descriptions.

Lint, typecheck, and tests

npm run lint — ESLint. The codebase has a small number of pre-existing warnings and one pre-existing error (in RetroOffice3D.tsx).
npm run typecheck — tsc --noEmit. Pre-existing type errors exist in some test files (agentChatPanel-*.test.ts) due to a stale onOpenSettings prop.
npm run test -- --run — Vitest unit tests (use --run for single-run mode). A few pre-existing failures exist.
npm run e2e — Playwright E2E tests; requires npx playwright install first.
npm run smoke:dev-server — starts the dev server on a random port and verifies HTTP response.

Read the full file on GitHub · 42 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.

5d ago First seen · 42 lines · 577 tokens per session scan A 23a965de51b8

Subscribe to this mod's changes

Hermes3D AGENTS.md is an instructions file published in the GitHub repository iamlukethedev/Hermes3D (337 stars, last pushed 6d ago), licensed MIT. It adds 577 tokens to every session, about $0.0029 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 2026-08-30.

3d-engine Frontend game-engine graphics hermes javascript

Hermes3D AGENTS.md

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

Agent Instructions

Development environment instructions

Service overview

Running the app

Lint, typecheck, and tests

What this file has done since we first saw it

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