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A weather-aware air conditioning automation written by Claude

Claude wrote a Home Assistant automation that adjusts AC cooling hourly from outdoor temperature, humidity and indoor readings, with heating only suggested.

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Credits

  • Reddit poster One_Communication963 Source ↗

Earliest dated source: 2 Sept 2025

The full story

The owner used Claude to update several Home Assistant automations, including a more dynamic one for their air conditioning. It runs hourly between 6am and 11pm, checks the outdoor "feels like" temperature, humidity, weather and average indoor temperature, works out a suggested temperature and mode, and sets the thermostat.

Heating suggestions are sent only as notifications. The owner shared the full YAML in the post.

How it was done

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Sources

From a short post by the maker, so the details are as they tell them.

  • Reddit: Using LLMs to create advanced dynamic automationsForum threadreddit.com
    Reddit poster: One_Communication963Posted 2 Sept 2025

    The maker's post on r/homeassistant.

    If it disappears: archived copy of Reddit: Using LLMs to create advanced dynamic automations (opens in a new tab)

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Prompt & Solder

An independent community project. Not affiliated with Anthropic.

What this is. Real projects where people used Claude to build, fix, port, revive or take apart something, from jailbroken Kindles to rebuilt DOS games, plus the times it went badly wrong. Every build links to where it was shared, and every source is listed here.

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