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Show HN: Breadcrumb, record everything on your mac + context manager for AI

Hi HN, I'm Justin.Breadcrumb records everything you do on your Mac (screen + meetings + AI transcripts + what you and your AI decided) and turns it into memory your AI can search. It's local and encrypted.You can also teach it rules by talking to it and it makes sure the right rules turn up in the right context. Works with Claude Code / Codex / Cursor / opencode.All of this is exposed to your AI as 30+ MCP tools (here's the definitions): https://innerloop.

Ask HN: Freelancer? Seeking freelancer? (October 2026)

Please lead with either SEEKING WORK or SEEKING FREELANCER, your location, and whether remote work is a possibility.Please only post if you are looking to hire a freelancer or work as one. Small (2-5 person) agencies are fine, but recruiters, job boards, and so on, are off topic here.

useRef in React

Understanding useRef in ReactuseRef is one of the built-in Hooks in React that allows us to store a value that persists between component renders. The main difference between useRef and useState is that changing a ref value does not cause the component to re-render. Because of this, useRef is useful when we want React to remember a value, but we do not want that value change to update the UI. A ref can also be used to directly access a DOM element, such as an input, button, or div. Ho

useEffect in React

What is useEffect?useEffect is a React Hook that runs code after a component renders.Some common use cases are:Fetching data from an APIUpdating the document titleWorking with localStorageSetting up timersAdding event listenersSyntaximport { useEffect } from "react";useEffect(() => { // Code}, []);The first argument is a function containing the code we want to execute.The second argument is called the dependency array. useEffect with an Empty Dependency Arrayimport { useEffect } f

TypeScript Contracts for Reliable Email Test Fixtures

Email tests usually start as a small helper: create an address, wait for a message, click a link, and move on. A few months later, that helper has become a hidden dependency for signup, password reset, billing, and notification tests. The failures are then hard to read because the test does not know whether the problem was the UI, the mail provider, or cleanup.The fix is to treat an email fixture as a product-like resource with a clear contract. In a TypeScript and React codebase, the type shoul

I built a 100% client-side JSON to CSV converter because I didn't trust web converters with sensitive API logs

Hey everyone,As a developer, I frequently need to flatten nested JSON exports and API responses into CSV format for analysis. Almost every free online tool I found uploads raw JSON data to backend servers for processing.If you are handling customer data, API keys, or internal logs, that's a security risk.I built DataFlex Studio (https://dataflexstudio.vercel.app) using Next.js and Web Workers.How it works:• Runs 100% inside your browser using background threads.• Handles recursive unwrapping of

How We Built PORCELE: A Modern Next.js E-Commerce Platform for Smart Bathroom Technology

How We Built PORCELE: A Modern Next.js E-Commerce Platform for Smart Bathroom TechnologyHow We Built PORCELE: A Modern Next.js E-Commerce Platform for Smart Bathroom TechnologyBuilding an e-commerce website for a physical product is very different from building a typical marketing website.For PORCELE, the goal was to create a premium digital experience for smart toilets while also building the technical foundation required for dynamic products, shopping carts, checkout, payments, responsive inte

September jobs report may show labor market is on the mend — but it’s far from cured

The U.S. job market has been stuck in what economists call a low-hire, low fire mode for the past two years — and the September employment report is likely to be in line with this unusual trend.<img src='https://images.unsplash.com/photo-1663405108219-ad9330c5ddf5?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=MnwyMzg1fDB8MXxzZWFyY2h8MjJ8fEpvYnN8ZW58MHx8Mnx8MTY3MjQwNDg3MQ&ixlib=rb-4.0.3&q=80&w=1080' />

Jobs report live updates: Labor market shows signs of stability against AI, macro undercurrents

The Labor Department will release a crucial jobs report on Friday, and it's expected to show the US jobs market remained sturdy in September.<img src='https://images.pexels.com/photos/9461216/pexels-photo-9461216.jpeg?auto=compress&cs=tinysrgb&w=1200' />

A pill that is not a link is a fact with nowhere to go, so we deleted 1,475 lines of them

One commit last week: 51 files, 541 insertions, 1,475 deletions. What it removed was a UI habit, and the interesting part is the rule we used to decide what stayed. The habitEvery page had accumulated a row of pills. Under the hero on a test-format page:63 practice tests · 40 providers · 10 free to try · 60 to 90 seconds a question · Calculator usually allowedEach one in its own rounded-full border px-3 py-1 text-xs wrapper. The same chips appeared on the hub cards one level up. Provider pa

Template errors: React and Next.js vs Angular 22.2&#039;s @boundary

A dashboard with three widgets. The sales widget reads data.points.length, and one day the backend returns { points: null }. On render, null.length throws a TypeError.The question is what the user sees: the whole screen broken, or just that widget with an error message. Each framework answers differently, and the answer says a lot about how each one is designed. React: a class componentIf a component throws while rendering and nobody catches it, React removes the whole UI from the screen. T

What a Product Engineer Actually Does

The title product engineer can sound broader than it is. In practice, it ismost useful when product decisions are still close to frontend implementation.This is the scope I can credibly own, where it helps a team, and where aspecialist should take the lead.A product engineer stays involved in the decisions around the code. On afrontend-heavy feature, that can mean clarifying the workflow, identifyingmissing states, shaping the component boundaries, and implementing the result. The useful pa

Spec Script Deal: &quot;Bleed the Night&quot;

Fox Entertainment Studios acquires horror spec script &quot;Bleed the Night&quot; written by Keith Cooper and Zoe Cooper, story by Keith Cooper and Justin Dyck. Via Deadline:Bleed the Night opens with a lonely teenager answering a mysterious ad reading &#x201c;MUST LOVE BLOOD.&#x201d; She then meets a charismatic young vampire who offers her the friendship and freedom she&#x2019;s always craved &#x2014; turning one summer night in 1994 into a bloody crime spree that tests just how far she&#x2019

React Email Fixtures Need a Cleanup Hook

When a signup flow depends on an email verification message, the inbox is part of the test fixture—even if the test code treats it like a string. A fixture that creates a disposable email address generator resource but never closes it can leave old messages, leaked addresses, and flaky retries behind.The fix is a small shift in ownership: create the inbox inside the test lifecycle, pass only the address to the React app, and make cleanup an explicit hook. This keeps React and TypeScript tests ea

Parents who want to help their kids in a tough job market should avoid this 1 move, says career expert

Some well-meaning career advice from parents is "totally useless" for new grads today, according to journalist Jodi Kantor.<img src='https://images.unsplash.com/photo-1636115869759-24e3b0b10859?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wyMzg1fDB8MXxzZWFyY2h8MTV8fEpvYiUyME1hcmtldHxlbnwwfHwyfHwxNzYyNzI5NjQ4fDA&ixlib=rb-4.1.0&q=80&w=1080' />

A tough job market is pushing more young Americans to make a big bet: on themselves

There has been a rise in entrepreneurship among young Americans as the entry-level labor market has become tougher to join.<img src='https://images.pexels.com/photos/27998595/pexels-photo-27998595.jpeg?auto=compress&cs=tinysrgb&w=1200' />

What To Expect From Friday’s Report On The Labor Market

Friday’s jobs report will show if the labor market remains resilient. Learn what forecasters expect for job growth, ...<img src='https://images.unsplash.com/photo-1762330466678-45b42e02f5a0?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wyMzg1fDB8MXxzZWFyY2h8Mnx8Sm9iJTIwTWFya2V0fGVufDB8fDJ8fDE3NjI3Mjk2NDh8MA&ixlib=rb-4.1.0&q=80&w=1080' />

Props in React – Introduction

When building React applications, we often create multiple components. These components need to communicate with each other and share data. Props are one of the most important concepts used for passing data between React components.The word Props is short for Properties. Props allow us to pass data from a parent component to a child component. What are Props?Props are read-only data passed from a parent component to a child component.For example, imagine a Student component. Instead of writ

HP&#039;s $699 OmniBook 5 boasts OLED and 42-hour battery life

HP is taking its turn at challenging the MacBook Neo. It's releasing a new OmniBook 5 14 that promises similarly fun colors, but with key upgrades over its main challenger — including potentially gigantic battery life.

Building CoTally — A Privacy-First Family Expense Tracker PWA with Offline Sync &amp; Multi-Currency

Most expense-splitting and budgeting apps today have become bloated, locked behind subscription paywalls, or require constant internet connectivity. More importantly, existing tools rarely balance shared household spending with personal financial privacy.To solve this, I built CoTally — a modern Progressive Web App (PWA) designed for families and households to track shared budgets, balance debts, and auto-convert currencies in real time, even without an internet connection.Here is a breakdown of