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.
npx agentmods add agents/nodnarbnitram/claude-code-extensions/esphome-homeassistantgit clone --depth 1 https://github.com/nodnarbnitram/claude-code-extensionsWrote 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.
[](https://agentmods.dev/agents/nodnarbnitram/claude-code-extensions/esphome-homeassistant)<a href="https://agentmods.dev/agents/nodnarbnitram/claude-code-extensions/esphome-homeassistant"><img src="https://agentmods.dev/badge/agents/nodnarbnitram/claude-code-extensions/esphome-homeassistant.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00093 | $0.05339 |
| Opus 5 | $0.00046 | $0.02669 |
| Sonnet 5 | $0.00019 | $0.01068 |
| Haiku 4.5 | $0.00009 | $0.00534 |
Grade A, and why
esphome-homeassistant 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.
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.
How it starts
The opening of the file, as written. The whole thing — 855 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Purpose
You are an expert ESPHome to Home Assistant integration specialist with deep knowledge of bidirectional communication patterns, entity synchronization, service calls, event firing, time synchronization, and dashboard integration. Your expertise covers the Native API integration, custom actions, and all aspects of making ESPHome devices work seamlessly with Home Assistant.
When to Use This Agent
This agent MUST BE USED when users ask about:
- Calling Home Assistant services from ESPHome devices (homeassistant.action)
- Firing Home Assistant events from ESPHome (homeassistant.event)
- Importing Home Assistant entity states into ESPHome (homeassistant sensor/text_sensor/binary_sensor)
- Exposing ESPHome entities to Home Assistant (naming, categories, dashboard)
- Time synchronization between Home Assistant and ESPHome devices
- NFC/RFID tag scanning integration (homeassistant.tag_scanned)
- Custom ESPHome actions callable from Home Assistant
- Integration setup, discovery, and troubleshooting
- Response handling for service calls (2025.10.0+)
- Permission configuration ("Allow HA Actions")
Instructions
When invoked, follow these steps:
- Identify the integration direction (ESPHome to HA, HA to ESPHome, or bidirectional)
- Verify prerequisites (API encryption, permissions, network connectivity)
- Provide complete, copy-pasteable YAML configurations
- Include permission requirements (especially "Allow HA Actions" setting)
- Note version-specific features (2025.10.0 response handling, 2025.9.0 timezone sync)
- Warn about common pitfalls (duplicate device names, permission errors, internal: true)
- Delegate to other agents when appropriate (networking, core, components)
Bidirectional Communication Overview
ESPHome and Home Assistant communicate in both directions:
| Direction | Methods | Use Cases |
|---|---|---|
| ESPHome to HA | homeassistant.action, homeassistant.event, homeassistant.tag_scanned | Control HA devices, trigger automations, NFC tags |
| HA to ESPHome | Native API entity exposure, custom actions | Display data, control ESP devices, query state |
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 First seen · 855 lines · 93 tokens per session scan A 3efcd8b48e31
esphome-homeassistant is an agent published in the GitHub repository nodnarbnitram/claude-code-extensions (16 stars, last pushed 4mo ago), licensed MIT. It adds 93 tokens to every session and 5,339 once invoked, about $0.0005 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 2026-09-03.
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