What is mcp-polvenn AGENTS.md?

Project instructions for polvenn-mcp-server, a local service that tracks Vinmonopolet products, stores, stock, release feeds, and watchlists. A watchlist is a saved set of items that can be checked for changes.

Use them when developing or modifying product searches, store discovery, stock checks, release-feed lookups, watchlist checks, configuration validation, or the server's MCP tools.

They explain the service's purpose, current boundaries, architecture, and important design decisions so code changes fit the existing project.

How henrikogaard/mcp-polvenn configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to henrikogaard/mcp-polvenn. 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/henrikogaard/mcp-polvenn/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/henrikogaard/mcp-polvenn

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/henrikogaard/mcp-polvenn/agents-md/github.svg)](https://agentmods.dev/instructions/henrikogaard/mcp-polvenn/agents-md)

Your own site

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

Per session 2,589 This file is loaded in full into every session.

When invoked 2,589 The same file — it is already loaded in full.

Security scan B 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	$0.02589	$0.02589
Opus 5.5	$0.01036	$0.01036
Sonnet 5.5	$0.00518	$0.00518
Haiku 4.5	$0.00259	$0.00259

Measured 1mo ago against content hash e24b6999da99, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

mcp-polvenn AGENTS.md scanned grade B 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 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

Add to `~/.codex/config.toml`:

AGENTS.md · 249 lines

How it starts

The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — Polvenn MCP Server

What is this?

A local-first MCP (Model Context Protocol) server for tracking beer releases on Vinmonopolet and an external release-feed API backed by your own collector/database.

Package: @henrikogard/polvenn-mcp-server
CLI: polvenn-mcp-server
Author: Henrik
Location: /Users/henrik/Dev/Repos/mcp-polvenn

Current scope

This project currently focuses on:

Vinmonopolet product search (beer releases and the full catalogue)
Vinmonopolet store discovery
Vinmonopolet stock checks
external release-feed lookups
local watchlist rules and incremental watchlist checks
local configuration validation

Architecture

polvenn-mcp-server/
├── src/
│   ├── index.ts              # Entry point — McpServer + stdio transport
│   ├── constants.ts          # API base URLs, defaults, retry/timeout settings
│   ├── types.ts              # Domain interfaces
│   ├── sql.js.d.ts           # Type declarations for sql.js
│   ├── tools/
│   │   ├── index.ts          # MCP tool registrations + handlers
│   │   └── server.test.ts    # End-to-end tests (in-memory MCP transport)
│   ├── resources/
│   │   └── index.ts          # resources + polvenn://product and polvenn://store templates
│   ├── prompts/
│   │   └── index.ts          # MCP prompts
│   ├── schemas/
│   │   ├── tools.ts          # Zod input schemas
│   │   └── output.ts         # Zod output schemas (structured content contracts)
│   ├── services/
│   │   ├── release-feed.ts   # External release feed client
│   │   ├── vinmonopolet.ts   # Vinmonopolet API client
│   │   └── watchlist.ts      # Watchlist matching logic
│   ├── utils/
│   │   ├── concurrency.ts    # Bounded-concurrency async mapping
│   │   ├── geo.ts            # Distance calculations
│   │   └── http.ts           # Fetch retry/backoff + per-attempt timeouts
│   └── db/
│       ├── database.ts       # SQLite via sql.js — watchlist, cache, config, migrations
│       └── migrations.test.ts
├── scripts/
│   └── smoke.mjs             # Stdio MCP handshake smoke test
├── .github/workflows/ci.yml  # lint + typecheck + test + build + smoke (Node 20/22/24)
├── package.json
├── tsconfig.json
├── biome.json
├── vitest.config.ts
├── .gitignore
├── README.md
└── AGENTS.md

Read the full file on GitHub · 249 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.

1mo ago Changed · +19 lines · +283 tokens per session e24b6999da99
1mo ago Changed · +37 lines · +980 tokens per session 10c8aad32fd1
2mo ago First seen · 193 lines · 1,326 tokens per session scan B fa81a87b3ca1

Subscribe to this mod's changes

mcp-polvenn AGENTS.md is an instructions file published in the GitHub repository henrikogaard/mcp-polvenn (0 stars, last pushed 1mo ago), licensed MIT. It adds 2,589 tokens to every session, about $0.0104 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

mcp-polvenn AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mcp-polvenn AGENTS.mdhenrikogaard/mcp-polvenn	Instructions file	0	1mo ago	MIT	B	2,589	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

mcp-polvenn: Instructions file for Codex