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Bit4id ID Card — Terminal Cheat Sheet

Oct 29, 2026

Setup at a glance

Everything runs natively on the M1 Mac. No reader driver is needed, and no Rosetta.

Piece	What it is	Where

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#!/usr/bin/env swift
// Adds black rounded corners to a wallpaper so maximized macOS windows blend into the screen edge.
//
// The default corner shape was measured from real maximized windows on macOS 27:
// a continuous ("squircle") corner of ~16.75pt.
//
// Usage: round-wallpaper.swift <image> [-o out.png] [--radius 16.75] [--top 0]
//                              [--size 2880x1800] [--color 000000] [--set]

import AppKit

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Learnings & Rules — Uncle Bob on Software Fundamentals in the Age of AI

Source: https://www.youtube.com/watch?v=zcLPGC-tvgk (Robert C. Martin × Matt Pocock, 56:39, 2026-08-19) Extracted from the transcript in transcript.md.

---

Core thesis

Agents suffer from messy code the same way humans do — just at a higher threshold. Bob's December/January experience: he let an agent pile change on change without cleaning up, and watched it thrash — fix one thing, inadvertently break another, fix that, break another, going in circles. One agent eventually gave up outright. Mess compounds until the agent stalls.

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# cd into the root of the worktree
cdw() {
    cd "$(git rev-parse --show-toplevel)"
}

# cd into the root of the default worktree
cdr() {
    cd "$(git rev-parse --git-common-dir | xargs dirname)"
}

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#!/bin/bash
set -e

INPUT=$(cat)
NAME=$(echo "$INPUT" | jq -r .name)
CWD=$(echo "$INPUT" | jq -r .cwd)
DIR="$CWD/.claude/worktrees/$NAME"
BRANCH="worktree-$NAME"

cd "$CWD"

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#!/usr/bin/env bash
set -euo pipefail

# List all starred archived GitHub repositories, then optionally unstar them.

echo "Fetching starred repositories..."

archived_repos=()
page=1

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[...$0.children]
    .map(el => el.querySelector('.thumbnail-overlay-badge-shape.ytd-thumbnail-overlay-time-status-renderer').textContent)
    .map(time => time.split(':').reverse())
    .map(([s = '0' , m = '0', h = '0']) => Number(s) + (Number(m) * 60) + (Number(h) * 3600))
    .reduce((a, c) => a + c, 0)/3600

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javascript: (() => {
    /* First open YT Transcript Panel, then copy paste this snippet into the console */
    let linesEl = [...document.querySelector('#segments-container').children];
    let linesTextIrregular = linesEl.map(el => el.textContent.trim());
    let linesText = linesTextIrregular.map(l => l.split('\n').map(s => s.trim()).filter(Boolean).join(' '));
    let paragraph = linesText.join('\n');
    copy(paragraph);
})();

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Note

This is a generic issue template to raise awareness about exactOptionalPropertyTypes support across TypeScript libraries.

Summary

This package's types are not fully compatible with TypeScript's exactOptionalPropertyTypes compiler flag (tsconfig.json).

Problem

With exactOptionalPropertyTypes: true, optional properties behave differently — they can’t be assigned undefined unless it's explicitly part of the type. Currently, this library's types treat optional properties as implicitly allowing undefined, which causes type errors in strict setups.

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<template>
  <component :is="vnode" />
</template>

<script setup lang="ts">
import {
  h,
  onServerPrefetch,
  shallowRef,
  watch,