generative-ui-foundry-hosted-agents: Instructions file for Codex

AGENTS.md

generative-ui-foundry-hosted-agents AGENTS.md is an instructions file for Codex, OpenCode from leestott/generative-ui-foundry-hosted-agents. It costs 3,510 tokens per session, scanned A, original, MIT.

Technical guidance for a web application where a React browser interface talks to an AI agent through CopilotKit and the AG-UI protocol. The agent runs on Microsoft's Azure services and uses managed identity for access.

In plain words
What is it for?
It is for building, deploying, and maintaining the React frontend, Node runtime, Azure-hosted agent, and their communication.
Why use it?
It gives developers a shared picture of the system's architecture and the conventions needed to keep its browser, runtime, hosted agent, and model deployment working together.

Instructions file for CodexOpenCode

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

This is leestott/generative-ui-foundry-hosted-agents's own configuration. It tells Codex and OpenCode how to work on generative-ui-foundry-hosted-agents 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 generative-ui-foundry-hosted-agents configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is cd ../runtime.

Reuse

Borrowing it

Nothing to install: this file belongs to leestott/generative-ui-foundry-hosted-agents. 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/leestott/generative-ui-foundry-hosted-agents/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/leestott/generative-ui-foundry-hosted-agents

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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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 3,510 This file is loaded in full into every session.
When invoked 3,510 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 $0.03510 $0.03510
Opus 5.5 $0.01404 $0.01404
Sonnet 5.5 $0.00702 $0.00702
Haiku 4.5 $0.00351 $0.00351

Measured 2mo ago against content hash bdbea4d9fc1a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

generative-ui-foundry-hosted-agents 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.

- **CopilotKit v2 request envelope** (what the frontend sends and how to curl it):
AGENTS.md · 265 lines

How it starts

The opening of the file, as written. The whole thing — 265 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidance for AI coding agents (and humans) working in this repository. This documents the validated, working architecture and the conventions that keep it working. It reflects the state of a solution that has been deployed and verified end-to-end on Azure.

TL;DR: A Microsoft Agent Framework agent is hosted as a Foundry Hosted Agent speaking AG-UI over the invocations protocol. A CopilotKit Node runtime on Azure App Service bridges the browser to the agent, and a React + CopilotKit frontend on Azure Static Web Apps renders the generative UI. Managed identity everywhere; no keys in code.


1. Architecture (the mental model)

Browser (React + CopilotKit)              Azure Static Web Apps
    │  POST /api/copilotkit  (CopilotKit v2 method envelope)
    ▼
CopilotKit runtime (Node/Express)         Azure App Service   ← holds endpoint + token
    │  AG-UI RunAgentInput  (SSE back)
    ▼
Foundry Hosted Agent  POST /invocations?api-version=v1        ← Microsoft Agent Framework
    │  reason + call server tools, stream AG-UI events
    ▼
Azure OpenAI model deployment (Model Router)

Three deployable units, one open protocol (AG-UI) between each hop:

Unit Tech Azure host Talks
agent/ .NET 10, Microsoft Agent Framework, AG-UI ASP.NET hosting Foundry Hosted Agent (container) receives AG-UI RunAgentInput, streams AG-UI SSE
runtime/ Node/TypeScript, @copilotkit/runtime + @ag-ui/client Azure App Service (Linux, Node 20) CopilotKit v2 ↔ AG-UI over Foundry invocations
frontend/ Vite + React + CopilotKit Azure Static Web Apps CopilotKit v2 to /api/copilotkit (SWA-proxied)

Why AG-UI over invocations: Foundry Hosted Agents pass the invocation body through byte-for-byte and stream the response back, so a synchronous POST /invocations → text/event-stream satisfies the contract. This lets the Microsoft Agent Framework AG-UI host serve the platform directly — no custom invocation handler required.

Read the full file on GitHub · 265 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 · 265 lines · 3,510 tokens per session scan A bdbea4d9fc1a

Subscribe to this mod's changes

generative-ui-foundry-hosted-agents AGENTS.md is an instructions file published in the GitHub repository leestott/generative-ui-foundry-hosted-agents (6 stars, last pushed 3mo ago), licensed MIT. It adds 3,510 tokens to every session, about $0.0140 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 2026-08-31.

Related

generative-ui-foundry-hosted-agents AGENTS.md compared with instructions from other repositories

generative-ui-foundry-hosted-agents AGENTS.md next to 6 instructions from other repositories
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generative-ui-foundry-hosted-agents AGENTS.mdleestott/generative-ui-foundry-hosted-agentsInstructions file63mo agoMITA3,510Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143ktodayMITA7,461Codex, OpenCode
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vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode