What is home-assistant?

A helper for managing Home Assistant, software that connects and automates smart-home devices. It works with devices, services, dashboards, automations, and their YAML configuration files.

Use it to check device states, debug automations, modify dashboards, and create YAML for smart-home routines.

It helps you inspect what exists in your smart home, find similar setups, diagnose automation problems, and produce configuration that matches your installation.

home-assistant — Skill for Claude Code and Codex by sammcj: A helper for managing Home Assistant, software that connects…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/sammcj/agentic-coding/home-assistant

Any agent

npx skills add sammcj/agentic-coding --skill home-assistant

Clone the repo

git clone --depth 1 https://github.com/sammcj/agentic-coding

Made for: Claude Code, Codex.

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/skills/sammcj/agentic-coding/home-assistant.svg)](https://agentmods.dev/skills/sammcj/agentic-coding/home-assistant)

Your own site

<a href="https://agentmods.dev/skills/sammcj/agentic-coding/home-assistant"><img src="https://agentmods.dev/badge/skills/sammcj/agentic-coding/home-assistant.svg" alt="Measured on agentmods" height="20"></a>

Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,259 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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	$0.00057	$0.03259
Opus 5	$0.00028	$0.01630
Sonnet 5	$0.00011	$0.00652
Haiku 4.5	$0.00006	$0.00326

Measured yesterday against content hash 40f5f1d29fb4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

home-assistant 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 yesterday.

The scan reads SKILL.md. This mod also ships 12 executable files (scripts/ha_call_service.py, scripts/ha_get_automations.py, scripts/ha_get_config_entries.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Skills/home-assistant/SKILL.md · 370 lines

How it starts

The opening of the file, as written. The whole thing — 370 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Home Assistant Helper

Overview

This skill provides tools and workflows for working with Home Assistant installations. It enables querying the live HA instance for entities, services, and configuration data, debugging automations, and generating YAML configurations for automations and dashboards.

Key Capabilities:

Query entities, states, and services from the live HA installation
Search for similar entities to use as examples
Check automation states and execution history
Generate YAML configurations for copy/paste into HA
Find real examples from the user's setup to inform new configurations

Core Workflow

When helping with Home Assistant tasks, follow this general approach:

Understand the requirement - What is the user trying to accomplish?
Discover existing entities - Use scripts to find relevant entities in their setup
Find similar examples - Search for existing automations or entities that do something similar
Generate YAML - Create well-formed YAML that can be copied directly into HA
Explain the configuration - Describe what the YAML does and how to install it

Available Scripts

All scripts require the HA_TOKEN environment variable to be set, which contains the Home Assistant long-lived access token. The HA instance is available at http://homeassistant.local:8123.

Important: All scripts now use uv with inline PEP 723 dependency declarations and the homeassistant-api library for consistent, maintainable code. Dependencies are automatically installed by uv on first run.

Entity Discovery

`ha_get_entities.py [domain]`

Retrieve all entities, optionally filtered by domain.

Usage:

uv run scripts/ha_get_entities.py           # All entities
uv run scripts/ha_get_entities.py light     # Just lights
uv run scripts/ha_get_entities.py sensor    # Just sensors

When to use: To discover what entities are available, especially when building new automations.

`ha_get_state.py <entity_id>`

Get the current state and attributes of a specific entity.

Read the full file on GitHub · 370 lines

Files

What ships with it

12 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

yesterday Changed · +2 lines 40f5f1d29fb4
4d ago First seen · 368 lines · 57 tokens per session scan A ba3e167ef12e

Subscribe to this mod's changes

home-assistant is a skill published in the GitHub repository sammcj/agentic-coding (159 stars, last pushed today), licensed Apache-2.0. It adds 57 tokens to every session and 3,259 once invoked, about $0.0003 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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