Livingston Samuel livingston

title	Prompting Claude Fable 5.1
url	https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-fable-5-1
description	Behavioral differences and prompting patterns for Claude Fable 5.1 and Claude Mythos 5.1, covering effort, progress updates, tool-call batching, conversation history, writing style, formatting, task completion, compaction summaries, scope and test coverage, search triggering, safeguard false positives, file edits, long outputs, subagents, and vision.

For the model's capabilities, API changes, pricing, and availability, see What's new in Claude Fable 5.1. For techniques that apply across Claude models, see Prompting best practices.

Your existing Claude Fable 5 prompts should perform well on Claude Fable 5.1 without changes, but a handful of behavioral differences are wor

High-level `node_modules` hoisting algorithm recipe

Take input dependency graph and start traversing it, as you visit new node in the graph - clone it if there can be multiple paths to access the node from the graph root to the node, e.g. essentially represent the graph with a tree as you go, to make hoisting possible.
You want to hoist every node possible to the top root node first, then to each of its children etc, so you need to keep track what is your current root node into which you are hoisting
Traverse the dependency graph from the current root node and for each package name that can be potentially hoisted to the current root node build a list of idents in descending hoisting preference. You will check in next steps whether most preferred ident for the given package name can be hoisted first, and if not, then you check the less preferred ident, etc, until either some ident will be hoisted or you run out of idents to check (no need to convert the graph to the tree when you build this prefe

Yarn Plugins

Yarn Plugin Hooks

Hook	Description
`registerPackageExtensions`	Called when the package extensions are setup
`setupScriptEnvironment`	Called before a script is executed
`wrapScriptExecution`	Called as a script is getting executed
`wrapNetworkRequest`	Called when a network request is being made
`globalHashGeneration`	Called before the build, to compute a global hash key that we will use to detect whether packages must be rebuilt (typically when the Node version changes)
`reduceDependency`	Called during the resolution, once for each resolved package and each of their dependencies

Animated SVG Avatar

Created a login form with an SVG avatar that responds to the input in the email field. Used the GSAP TweenMax library + GSAP's MorphSVG plugin for the animating.

Email validation is very simple and crude just for the purposes of getting this prototype working.

A Pen by Darin on CodePen.

License.

Keybase proof

I hereby claim:

I am livingston on github.
I am livingston (https://keybase.io/livingston) on keybase.
I have a public key ASAlV_QMSgPao2ilqZHRJkDxAPSRnZ9Tp9zCcYW9uXw82wo

To claim this, I am signing this object:

Usage

var welcome_user = new Template('#{welcome} #{name}!!');

welcome_user.parse({ welcome: "Hello", name: "John" });
//returns "Hello John!!"

welcome_user.parse({ welcome: "Hola", name: "Peter" });

	<!doctype html>
	<html>
	<head>

	<meta charset="utf-8" />

	<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,600,700" />
	<link rel="stylesheet" href="https://fortawesome.github.io/Font-Awesome/assets/font-awesome/css/font-awesome.css" />
	<link rel="stylesheet" href="https://refreshless.com/nouislider/source/distribute/jquery.nouislider.min.css" />
	<style id="jsbin-css">

	//requires jQuery & lodash

	(function getAllFontSizes (fontSizes) {
	$('*').each(function (i, n, s) { s = getComputedStyle(n)['font-size']; (s !== '0px') && fontSizes.push(s) });
	console.log(_.chain(fontSizes).uniq().sortBy(function (v) { return parseInt(v, 10); }).join(', ').value());
	}([]));

	(function(){
	var canvas = document.getElementById('hexmap');

	var hexHeight,
	hexRadius,
	hexRectangleHeight,
	hexRectangleWidth,
	hexagonAngle = 0.523598776, // 30 degrees in radians
	sideLength = 36,
	boardWidth = 10,