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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.

unrevised6419

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

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

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declare global {
    interface FormDataEnhanced<FormName extends string> {
        get(name: FormName): FormDataEntryValue | null;
    }

    var FormDataEnhanced: {
        prototype: FormDataEnhanced<string>;
        new<FormName extends string>(form?: HTMLFormElement, submitter?: HTMLElement | null): FormDataEnhanced<FormName>;
    };
}

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"use client";

import { startTransition, type TransitionFunction } from "react";

function useStartTransition<Args extends unknown[]>(
	cb: (...args: Args) => ReturnType<TransitionFunction>,
) {
	return (...args: Args) => startTransition(() => cb(...args));
}