What is hermes-ui AGENTS.md?

A setup runbook for hermes-ui, a browser interface for a running Hermes gateway. The gateway supplies the interface, web requests, sign-in, and live connection.

Checking prerequisites, building the interface, and serving it from the Hermes gateway on the same website origin.

It prevents a cross-origin setup that can break sign-in, session cookies, or the live WebSocket connection.

How przbadu/hermes-ui configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to przbadu/hermes-ui. 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/przbadu/hermes-ui/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/przbadu/hermes-ui

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/przbadu/hermes-ui/agents-md/github.svg)](https://agentmods.dev/instructions/przbadu/hermes-ui/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/przbadu/hermes-ui/agents-md"><img src="https://agentmods.dev/badge/instructions/przbadu/hermes-ui/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/przbadu/hermes-ui/agents-md"><img src="https://agentmods.dev/badge/instructions/przbadu/hermes-ui/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,006 This file is loaded in full into every session.

When invoked 1,006 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.

Model	Per session	Once invoked
Fable 5.1	$0.01006	$0.01006
Opus 5.5	$0.00402	$0.00402
Sonnet 5.5	$0.00201	$0.00201
Haiku 4.5	$0.00101	$0.00101

Measured 2mo ago against content hash f27c83a96fb4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hermes-ui 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

3. `curl -sf http://127.0.0.1:9119/api/status` confirms a gateway is reachable. Note its host and port. You will serve the UI from the gateway itself, so it must be one you can start or restart.

AGENTS.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Runbook for an AI agent (Hermes, Claude Code, and similar) to set up and run hermes-ui. Follow the steps in order. This uses the manual path only: build the bundle and serve it from the gateway. For the full human-facing reference, see README.md.

What you are setting up

hermes-ui is a browser UI for a running Hermes gateway. It has no backend of its own. The gateway serves the built bundle, so the UI, REST, auth, and the WebSocket all share the gateway's origin.

The one hard rule

The UI MUST be served same-origin with the gateway. The gateway rejects cross-origin browsers: CORS is locked to localhost, session cookies are SameSite=Lax, and the WebSocket closes foreign origins with close code 4403. Serving the bundle from the gateway (the steps below) satisfies this automatically. Do not host the bundle on a different origin and point it at the gateway; OAuth sign-in and the WebSocket will fail.

Preflight

Run these checks before changing anything.

bun --version verifies the package manager and script runner. If it is missing, install it from https://bun.sh and stop if it cannot be installed.
command -v hermes verifies the Hermes CLI that runs the gateway. If it is missing, the gateway is not installed here; ask the human where the gateway runs.
curl -sf http://127.0.0.1:9119/api/status confirms a gateway is reachable. Note its host and port. You will serve the UI from the gateway itself, so it must be one you can start or restart.

Build

From the repo root:

cd app
bun install
bun run build

This produces app/dist/ containing index.html and an assets/ subdirectory. The build is a single large bundle, so expect it to take a few seconds and be tens of MB.

Serve (manual)

Serve the built bundle FROM the gateway so everything is same-origin. Prefer the ready-made runner, from the repo root:

./bin/prod                # builds if needed, then serves from the gateway
./bin/prod --port 9200    # extra args pass straight through to 'hermes serve'

Read the full file on GitHub · 93 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.

2mo ago First seen · 93 lines · 1,006 tokens per session scan A f27c83a96fb4

Subscribe to this mod's changes

hermes-ui AGENTS.md is an instructions file published in the GitHub repository przbadu/hermes-ui (145 stars, last pushed 2mo ago), licensed MIT. It adds 1,006 tokens to every session, about $0.0040 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

hermes-ui AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
hermes-ui AGENTS.mdprzbadu/hermes-ui	Instructions file	145	2mo ago	MIT	A	1,006	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

hermes-ui: Instructions file for Codex