aiohomematic: Instructions file for Claude Code

CLAUDE.md

aiohomematic CLAUDE.md is an instructions file for Claude Code from SukramJ/aiohomematic. It costs 7,358 tokens per session, scanned A, original, MIT.

AI-assistant instructions for aiohomematic, a Python library for controlling Homematic smart-home systems. They highlight special handling required for CUxD and CCU-Jack interfaces and point to the project's detailed rules.

In plain words
What is it for?
Use them before changing interface code, especially CUxD or CCU-Jack support, and when running the project's tests or investigating smart-home device behavior.
Why use it?
They warn agents that these interfaces do not behave like the standard ones. Following the required contract test and guidance helps avoid breaking compatibility during refactoring.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md.

This is SukramJ/aiohomematic's own configuration. It tells Claude Code how to work on aiohomematic 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 aiohomematic configures →

Reuse

Borrowing it

Nothing to install: this file belongs to SukramJ/aiohomematic. 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/SukramJ/aiohomematic/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/SukramJ/aiohomematic

Made for: Claude Code.

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Per session 7,358 This file is loaded in full into every session.
When invoked 7,358 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 $0.07358 $0.07358
Opus 5 $0.03679 $0.03679
Sonnet 5 $0.01472 $0.01472
Haiku 4.5 $0.00736 $0.00736

Measured 5d ago against content hash ac5d73c636f4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

aiohomematic CLAUDE.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.

CLAUDE.md · 716 lines

How it starts

The opening of the file, as written. The whole thing — 716 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md - AI Assistant Guide for aiohomematic

This document is the entry point for AI assistants (like Claude) working on the aiohomematic codebase. It intentionally stays concise and delegates deep details to docs/ — treat the linked documents as the source of truth and only fall back to this file for orientation.

Table of Contents

  1. CUxD / CCU-Jack Special Handling (critical)
  2. Project Overview
  3. Codebase Structure
  4. Development Environment
  5. Code Quality & Standards
  6. Testing Guidelines
  7. Architecture & Design Patterns
  8. Common Development Tasks
  9. Git Workflow
  10. Key Conventions
  11. Implementation Policy
  12. Interaction Protocol
  13. Tips for AI Assistants

⚠️ CRITICAL: CUxD/CCU-Jack Special Handling

STOP AND READ THIS BEFORE ANY REFACTORING

CUxD and CCU-Jack are NOT normal Homematic interfaces. They require special handling that has been broken multiple times during AI-assisted refactoring. Before making any changes, run:

pytest tests/contract/test_cuxd_ccu_jack_contract.py -v

What Makes CUxD/CCU-Jack Different

Aspect Standard Interfaces (HmIP-RF, BidCos-RF) CUxD / CCU-Jack
Protocol XML-RPC JSON-RPC
Ports 2001, 2010, 2000, 2002 80 (HTTP) / 443 (HTTPS)
Events XML-RPC Server (push) Polling (default) or MQTT (optional via HA)
Ping/Pong ✅ Yes ❌ No
Backend Class CcuBackend or HomegearBackend JsonCcuBackend
XML-RPC Proxy Required NOT used
Capabilities CCU_CAPABILITIES JSON_CCU_CAPABILITIES

Read the full file on GitHub · 716 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. 5d ago Changed · +7 tokens per session ac5d73c636f4
  2. 9d ago First seen · 716 lines · 7,351 tokens per session scan A 1a3c894cbb21

Subscribe to this mod's changes

aiohomematic CLAUDE.md is an instructions file published in the GitHub repository SukramJ/aiohomematic (167 stars, last pushed today), licensed MIT. It adds 7,358 tokens to every session, about $0.0368 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.

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