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idm-mcp-server: Instructions file for Codex

AGENTS.md

idm-mcp-server AGENTS.md is an instructions file for Codex, OpenCode from Xerolux/idm-mcp-server. It costs 598 tokens per session, scanned A, original, MIT.

Repository-specific instructions for a heat-pump MCP server, including its project structure, commands, tests, and safety rules. MCP is a standard way for an AI agent to call tools provided by another program.

In plain words
What is it for?
Use them when developing or testing the server, running its checks, or changing device communication. The listed commands cover setup, tests, linting, formatting, and startup.
Why use it?
They give coding agents the local rules needed to work safely in that repository, including keeping device writes disabled by default. The description is specific to that project rather than a general add-on.

Instructions file for CodexOpenCode

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

This is Xerolux/idm-mcp-server's own configuration. It tells Codex and OpenCode how to work on idm-mcp-server 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 idm-mcp-server configures →

not rated 0repo yesterday A scan 598 tokens original MIT
View source ↗ Xerolux/idm-mcp-server
Reuse

Borrowing it

Nothing to install: this file belongs to Xerolux/idm-mcp-server. 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/Xerolux/idm-mcp-server/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Xerolux/idm-mcp-server

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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<a href="https://agentmods.dev/instructions/xerolux/idm-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/xerolux/idm-mcp-server/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/xerolux/idm-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/xerolux/idm-mcp-server/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 598 This file is loaded in full into every session.
When invoked 598 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 $0.00598 $0.00598
Opus 5.5 $0.00239 $0.00239
Sonnet 5.5 $0.00120 $0.00120
Haiku 4.5 $0.00060 $0.00060

Measured today against content hash ab9fed863616, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

idm-mcp-server 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 today.

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 · 48 lines

How it starts

The opening of the file, as written. The whole thing — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Arbeitsrichtlinien für Coding-Agenten in diesem Repository.

Projekt

idm-heatpump-mcp ist ein MCP-Server (stdio & Streamable HTTP) für IDM-Wärmepumpen. Die gesamte Gerätekommunikation läuft über idm-heatpump-api (Registerkarte, Modellerkennung, Write-Sicherheit, Web-Clients) – nie direkt über pymodbus und nie mit eigenen Registeradressen. Registerfragen werden in der API gelöst, nicht hier.

Struktur

  • src/idm_mcp/config.py – pydantic-Settings (IDM_*-Env, .env)
  • src/idm_mcp/service.py – Modbus-Logik, Write-Gates, Poller, Cyclic-Pflege
  • src/idm_mcp/web.py – Web-Supplement (Nav10-WS/Nav20-HTTP), Gates je Aktion
  • src/idm_mcp/server.py – FastMCP-Tools/Resources, Lifespan-Poller, Transporte
  • tests/ – pytest mit FakeTransport + FakeWebClient (keine echte Anlage nötig)

Befehle

python -m venv .venv && source .venv/bin/activate
pip install -e '.[test]'
pytest tests/ -v          # Tests
ruff check src tests      # Lint
ruff format --check src tests
idm-mcp                   # Server starten (stdio)

Regeln

  1. Sicherheit zuerst: Schreibvorgänge bleiben standardmäßig deaktiviert. Neue Schreibpfade MÜSSEN durch IdmService._gate_write bzw. _gate_web_write (Write-Klasse + Allowlist) laufen. validate_write/ Dry-Run darf niemals Geräte-I/O auslösen.
  2. API-Änderungen: Kompatibilität nur gegen die öffentliche API von idm_heatpump (snapshot-getestet in der API); keine privaten Attribute. Beim Versionstan der API beachten: Pin in pyproject.toml anheben und CHANGELOG.md ergänzen.
  3. Tests: Jedes neue Feature bekommt Tests gegen die Fakes; Live-Tests gegen echte Anlagen nur lesend (IDM_ALLOW_WRITES ungesetzt) und nie in CI.
  4. Doku: README-Tooltabellen, docs/configuration.md (Variablen) und docs/safety.md bei Verhaltensänderungen mitpflegen. Neue Versionen erhalten einen CHANGELOG.md-Eintrag.
  5. Style: Ruff (line-length 100, py312), ruff format vor dem Commit.

Read the full file on GitHub · 48 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. today First seen · 48 lines · 598 tokens per session scan A ab9fed863616

Subscribe to this mod's changes

idm-mcp-server AGENTS.md is an instructions file published in the GitHub repository Xerolux/idm-mcp-server (0 stars, last pushed yesterday), licensed MIT. It adds 598 tokens to every session, about $0.0024 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 2026-11-10.

Hardware and IoTTestingUnit testing
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