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Replicating Friday: A Guide to Building an Agentic Home Assistant AI Voice Assistant

condensed and arranged from NathanCu's thread on the HomeAssistant forums: https://community.home-assistant.io/t/fridays-party-creating-a-private-agentic-ai-using-voice-assistant-tools/855862 i used fabric to grab it and carve it up for me to run it through Gemini for the resulting documentation below for review, as it wasn't obviously documented anywhere and this information is too good to get lost in a forum post. --@emory

Introduction: Embracing the Agentic AI Philosophy

Nathan Curtis's "Friday" project is a deep dive into creating a truly "agentic" AI within Home Assistant, moving beyond simple command-and-control to enable proactive, reasoning, and conversational interactions. This guide distills Nathan's insights, code, and architectural decisions, aiming to provide a playbook for those looking to build a similar sophisticated AI assistant.

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type: custom:timer-bar-card
entities:
  - entity: timer.youtube_15_minutes
    state_color: true
    name: YouTube
    translations:
      idle: Blocked
    extend_paper_buttons_row:
      position: right
      buttons:

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require 'sorbet-runtime'
require 'active_support'

class ApplicationScript < T::InexactStruct
  def self.run!(args = ARGV)
    options = {}
    OptionParser.new do |parser|
      props.each do |propname, prop|
        # special case T::Boolean because OptionParser doesn't understand it
        if prop[:type] == T::Boolean

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# Step 1: write a gist with a file named __script__.rb
# Step 2: copy and paste the function def below into Rails console
# Step 3: run `eval_gist("the-gist-id-from-the-url")`
# Step 4: GOTO Step 3

def eval_gist(gist_id)
  eval(JSON.parse(Net::HTTP.get(URI("https://api.github.com/gists/#{gist_id}"))).dig("files", "__script__.rb", "content"))
end

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require 'rubygems'
require 'bundler/setup'

require 'pg'
require 'sequel'
require 'ledger_gen'
require 'google_drive'

SPREADSHEET_ID = 'your-google-sheet-id'
DATABASE_URL = 'postgres://username:password@host/database'

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require 'rubydns'
require 'httparty'
require 'lru_redux'

class ZeroTierAPI
  include HTTParty

  base_uri "https://my.zerotier.com/api"
  headers 'Authorization' => "Bearer #{ENV['ZT_API_TOKEN']}"

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require 'rubydns'

INTERFACES = [
    [:udp, "0.0.0.0", 5300],
    [:tcp, "0.0.0.0", 5300]
]

IN = Resolv::DNS::Resource::IN

UPSTREAM = RubyDNS::Resolver.new([[:udp, "8.8.8.8", 53], [:tcp, "8.8.8.8", 53]])

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task :run_gist => :environment do
  url = ENV['url']
  raise "usage: rake run_gist url=https://gist.github.com/asdfasdfasdfasdf" unless url.present?

  dir = Dir.mktmpdir

  system("git clone #{url} #{dir}")
  
  Dir.chdir(dir) do
    raise "Gist does not have a script.rb file to execute" unless File.exists?('script.rb')

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You agree that the following terms apply to all of your past, present and future Contributions. Except for the licenses granted in this Agreement, you retain all of your right, title and interest in and to your Contributions.

Copyright License. You hereby grant, and agree to grant

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#!/bin/bash

# This depends on a file named `/root/backup_dirs` containing a list of directories to backup
# one per line. All directories in that file, plus a database dump, will be archived together.
#
# Further, if you have a gitolite installationn, this will backup every repo in an individual archive.

set -e
set -x
set -o pipefail