Avi Levin Arithmomaniac

Created/edited by GitHub Copilot with human review/feedback by Avi Levin.

Copilot canvas apps: the missing mental model

This guide is for the moment after you have read GitHub's Working with canvas extensions in the GitHub Copilot app, seen a create-canvas demo, and want to build something real with it.

The demo makes the feature look simple: Copilot creates an extension, opens a panel, and shows an HTML app. That is real. The confusing part starts when you expect the app to remember things, react to agent changes, or ask the agent to continue work.

The short version:

"כָּאֵ֔לֶּה": The Rise of a Passover Torah-Reading Meme

Abstract: The phrase "כָּאֵ֔לֶּה" ("ka'eleh"), encountered during the Torah reading (leining) on Passover (Pesach), has evolved from a functional halakhic safeguard into a beloved communal in-joke and ultimately into an internet meme and pop song. This report traces that full arc: from the word's biblical setting in the sacrificial laws of Numbers 28, through the Galician halakhic authority (Sha'arei Ephraim, early 19th century) whose emergency re-reading procedure became the ritual's origin point, through the cantillation mechanics that make the word musically irresistible, through the organic synagogue tradition of the congregational "shout-out," through the halakhic and humor-driven debates it has spawned in forums and social media, through community reception across Ashkenazi, Sephardi, Haredi, Modern Orthodox, and secular Jewish worlds, to its culminating artifact: a 2024 pop song by Joey Newcomb that carried the custom from the *

	#!/usr/bin/env python3
	"""
	Pikud HaOref Alert Display Server for Jetson Nano.
	Single-file server: polls oref.org.il API, serves fullscreen color page.
	GREEN = all clear (default)
	ORANGE = early warning / news flash
	RED = active siren (missiles, terror, etc.)

	Alert logic ported from amitfin/oref_alert Home Assistant integration.
	"""

	<#
	.SYNOPSIS
	Interacts with the Sefaria REST API to support the Goral HaGra skill.
	.DESCRIPTION
	Provides actions for random verse selection, translation lookup, verse data retrieval,
	and related text search using the Sefaria API.
	#>
	param(
	[ValidateSet('random-verse', 'get-translations', 'get-verse-data', 'search-related')]
	[string]$Action = 'random-verse',

	openapi: 3.0.0
	info:
	title: (title)
	version: 0.0.0
	tags: []
	paths:
	/widgets/{id}:
	get:
	operationId: Widgets_read
	responses:

	#!meta

	{"kernelInfo":{"defaultKernelName":"csharp","items":[{"aliases":[],"languageName":"csharp","name":"csharp"}]}}

	#!markdown

	# Data Flows with Async Streams and Channels
	Avi Levin (@Arithmomaniac)<br>
	2023-07-30

	<Query Kind="Statements" />

	using System;
	using System.Buffers;
	using System.Diagnostics;
	using System.Threading;
	using System.Threading.Tasks;

	// based on https://github.com/dotnet/runtime/blob/main/src/libraries/System.IO.Pipelines/src/System/IO/Pipelines/PipeReaderStream.cs

	public static class GroupBatchExtension
	{
	/// <summary>A simple IGrouping implementation used by GroupBatch.</summary>
	private class GroupBatchGrouping<TKey, TElement> : List<TElement>, IGrouping<TKey, TElement>
	{
	public GroupBatchGrouping(int rank, TKey key, IEnumerable<TElement> values):base(values)
	{
	Key = key;
	Rank = rank;
	}

	# The following is from https://blogs.technet.microsoft.com/pauljones/2014/01/09/backing-up-a-file-system-to-azure-storage-with-powershell-2/

	# This script was written by Kevin Saye (ksaye@saye.org)
	#
	# This is a Powershell backup script that backs up entire directories to Azure Storage
	# to get the Azure Powershell modules, you must install the following commandlets:
	# http://www.windowsazure.com/en-us/manage/install-and-configure-windows-powershell/
	# A special thanks to http://www.nikgupta.net/2013/09/azure-blob-storage-powershell/ for the tips!
	#
	# I am assuming you have one container for each machine you are backing up.