Issue 4 · November 12, 2026

Builder
Radar Weekly

The builds worth your time this week, who they were made for, and the pairs of strangers who should be trading phone numbers.

Nov 2 – Nov 12 · 752 builds · 36 communities
Full radarThe whole sky. One search box.All 752 blips, filterable by lane, source, audience and the model behind them. Open the Explorer →

Ten blips per sector. The closer to center, the louder the signal. Ringed dots made the issue. Hover a dot for its name, click a wedge to open that lane.

The week in numbers
752 builds 135 posted in 2+ places 633 Reddit · 58 Hacker News · 54 GitHub · 7 dev.to

What they built with (where stated)

  • Claude Code122
  • Claude78
  • Codex49
  • Qwen34
  • DeepSeek16
  • Opus12
  • Gemini11
  • GPT10
From the editor

This week someone who says they don't know what React is shipped an app that 90 dentists use every day. A non-programmer built an ERP for a construction company and went live the next morning. And the most upvoted build of the week was a wallpaper that politely moves out of the way of your desktop icons.

Also on the radar: a globe a dad built for his two boys, forty mini PCs lashed together with USB cables, and a horror game where a stranger texts you for help.

The lead story is about who's building now. Further down: a webcam that gives you an X-ray, an AI agent that phoned a restaurant to order dinner, three separate ways to run models bigger than your RAM, and an agent that has to pay its own API bills (it is not going well).

01
Lead story

“I don't know what React is.” Ninety dentists use the app anyway.

The most-discussed business build this week came from someone who opened with "I don't know what React is." They built a digital log for dental sterilization cycles, replacing paper clipboards, and about 90 dentists use it every day. 533 people weighed in, most of them asking how.

They weren't alone. A self-described non-programmer built an ERP with ChatGPT for an industrial construction company and was going live the next day. A small PDF editing and signing tool, first used at its founders' own construction company, picked up 80 users in 24 hours. Someone used Claude to organize a legal database into a public archive of 300,000 searchable military-law documents. And a tool now turns a Google Maps business listing into a full website in under a minute.

None of these are developer toys. They're boring, useful software for dentists, contractors and small businesses, built by the people who need them. That's the shift worth watching.

Business & work

A sterilization log for dentists

Digital sterilizer-cycle log replacing paper clipboards in dental clinics, used by about 90 dentists.

1,097 votes · 533 commentsr/vibecoding
Business & workGPT

A ChatGPT-built ERP

ERP system built with ChatGPT for an industrial construction company's operations, going live at work.

206 votes · 187 commentsr/ChatGPTPro
Business & work

pdfella

PDF editor and signing tool first used at the founders' construction company.

168 votes · 95 commentsr/SaaS
Business & workClaude

A legal database, made public

Public archive of 300,000 searchable military-law documents organized with Claude for a nonprofit.

1,333 votes · 64 commentsProject ↗r/ClaudeAI
Business & work

Maps listing to website

Turns a Google Maps business listing into a full website in under a minute.

53 votes · 71 commentsProject ↗r/SideProject
02
Matchmaking

Better together

Four pairs of builders who have never met. Each build is good alone. Bolt two together and you get something nobody has shipped yet. Consider this the introduction.

A Claude usage taskbar widgetOn its own: shows how fast you're using your Claude limits, not why.
+
PrefixwiseOn its own: explains which calls waste tokens, but you have to go look.
→
TogetherWatch your Claude limits drain in real time, and know exactly which calls are wasting them

See the meter, fix the leak

One builder made a tiny Windows taskbar widget that shows your Claude five-hour and weekly usage. Another built Prefixwise, an MIT-licensed proxy that explains why your Claude Code, Codex or agent calls miss the prompt cache, and what each miss costs.

How it fits: The widget shows you're burning through your limit; Prefixwise shows why. Together they'd turn "I'm out of tokens again" into a fix.

sand3dOn its own: lets an AI build 3D models in code, then hands you a model to render.
+
vorkOn its own: renders scenes and effects for agents, but needs something to render.
→
TogetherAn AI agent that models a 3D scene in code and renders it with effects, start to finish

Model it, then light it

sand3d is 3D modeling in Python, designed for language models to write. vork is a headless 3D and visual-effects engine built for agents, in research preview.

How it fits: sand3d's models fed straight into vork, so an agent can build the scene and render the shot without a human touching a 3D tool.

ZammothOn its own: helps you make the song, then stops at the audio file.
+
LyricalStudioOn its own: makes beautiful lyric videos, for songs someone else made.
→
TogetherMake a song with Claude running the session, then get a synced lyric video for free

From session to music video

Zammoth is a native Mac recording studio where Claude can run the whole session. LyricalStudio is a music player that turns lyrics into kinetic typography, synced word by word.

How it fits: Finish a track in Zammoth, hand the lyrics and audio to LyricalStudio, and the lyric video comes out the other side.

Writing with a Claude tutorOn its own: corrects your writing, but the corrections fade.
+
Remember what you readOn its own: helps you remember things, if you remember to add them.
→
TogetherPractice a language by writing, then keep what you learned instead of forgetting it

Write it, then remember it

One builder learns languages by writing with Claude as a tutor. Another got tired of forgetting what they read and built a cross-device app for remembering it, as an alternative to Anki.

How it fits: The tutor's corrections turned into review cards, so this week's mistakes are next week's flashcards.

03
Parallel builders

Same idea, different builders

Two ways to watch your agent work, three ways to run a model bigger than your RAM, two paint apps that hand the AI the brush. Same problem, different garages.

Same idea, different builders

Watching your agents work

A live map of your agentr/ClaudeAI
A pixel-art agent officer/SideProject

One builder made a Claude Code add-on that draws a live map of what the agent is doing, in a pane beside the chat. Another built a pixel-art office where you can watch your Claude Code agents work, wait and nap.

If they talked: Same itch, one serious and one charming. The live map's data would make the office far more than decoration.

Same idea, different builders

Models bigger than your RAM, three ways

Banachr/LLMDevs
BigMoeOnEdger/Qwen_AI
RustingStratar/LocalLLM

Banach runs trillion-parameter models on a 64GB desktop by streaming the weights. BigMoeOnEdge places model weights so phones and laptops can run models larger than their memory. RustingStrata runs a 249GB model on a single 12GB graphics card, in pure Rust.

If they talked: Three builders attacking the same wall from different sides. Comparing notes on which weights to load when would help all three.

Same idea, different builders

Paint apps that an AI can hold the brush in

KladShow HN
PeerBrushr/SideProject

Klad is a paint app your coding agent can drive. PeerBrush is an open-source image editor where you and an AI agent work on the same layered canvas.

If they talked: One is built for agents to drive, the other for humans and agents to share. A common way for agents to talk to a canvas would serve both.

04
Five that got people talking

The ones everyone argued about

  1. 1
    Developer tools & agentsClaude CodeCodex

    agent-autoloop

    Lets command-line agents take on tasks in the background and see them through, only pinging you with a card when they're unsure. 4,600 stars and 843 comments.

    4,602 stars · 843 commentsProject ↗
  2. 2
    Creative & entertainment

    An icon-aware wallpaper

    A desktop wallpaper that rearranges itself around your icons so they're always readable. The most upvoted build of the week, by a mile: 7,762.

    7,762 votes · 361 commentsProject ↗r/SideProject
  3. 3
    Creative & entertainmentClaude

    X-ray mirror

    Point your webcam at your face and see a skull, brain and facial muscles overlaid on it, like an X-ray mirror. Built with Claude.

    4,223 votes · 236 commentsProject ↗r/ClaudeAI
  4. 4
    Games & hobbiesClaude Code

    A sailing sim for AI models

    A sailing simulator where the frontier AI models race each other. 3,000 upvotes from people who wanted to know who won.

    3,013 votes · 185 commentsr/ClaudeAI
  5. 5
    Developer tools & agentsClaude Code

    A live map of your agent

    A Claude Code add-on that draws a live map of what the agent is doing, right beside the chat.

    2,440 votes · 137 commentsProject ↗r/ClaudeAI
05
Back on the radar

They shipped again

Six builders from last issue who came back with news. The Opus-nerf watch hit day 47, the tiny kanban board learned to follow you between machines, and the Codex reset alerts started keeping score.

Developer tools & agentsClaude

LiveNerf

Day 47 of asking whether Opus 5.5 got quietly worse. Still testing, still posting, and 444 people showed up for the update.

Last issue: Ongoing test tracking whether model performance silently degrades; Opus 5.5 shows none.

444 votes · 83 commentsProject ↗r/ClaudeAI
Developer tools & agentsCodex

Reset Alerts

It started as a text when your Codex limits reset. Now it keeps score: this week marked the second-longest drought between reset announcements in six months.

Last issue: Text alert service for Codex usage resets, with 30 day update.

55 votes · 21 commentsProject ↗r/codex
Developer tools & agents

Kanzo

The tiny kanban board for you and your coding agents now follows you across every machine. Still a 4 MB binary.

Last issue: Tiny self-hosted kanban board shared by you and coding agents.

15 votesProject ↗r/LLMDevsr/ClaudeCoder/mcpr/ClaudeAI
Developer tools & agentsLangChain

schemagate

Now a drop-in retriever for LangChain and LangGraph that hands the model only the tables it needs. The builder says it cuts schema tokens by about 91%.

Last issue: Open-source schema selection that tops the BIRD Mini-Dev text-to-SQL leaderboard.

13 votes · 15 commentsProject ↗r/LangChain
Creative & entertainmentAI

Recto

Last issue it was a canvas for coding agents. Now it's a desktop app: design with AI, then fix it with your mouse.

Last issue: Visual canvas for working with coding agents.

8 votes · 10 commentsProject ↗Show HN
Business & workMistral

The Machine

The open-source assistant that reads your mail and Slack and keeps your to-do list now runs on Mistral.

Last issue: Open-source agent reading inbox, Slack and chats that prepares replies for approval.

9 votes · 8 commentsProject ↗r/MistralAIr/ChatGPT
06
Built for

Who got built for this week

752 builds, 381 audiences. Developers building for developers, sure. The good stuff is down the long tail: birders, DJs, long-distance couples, two kids sharing one iPad. Tap one and the Explorer serves up everything made for them.

07
Under the radar

Big in a small room

Appetizers before the main course. Each of these was the biggest thing in its own corner of the internet and never came close to the front page. Hardly an upvote between them, but the comment threads ran long. A stranger who stops to argue is worth ten who scroll past.

Games & hobbiesClaude Code

Kithland

A monster-taming RPG in your browser, about thirty hours long, built across 590 Claude Code sessions.

17 votes · 40 commentsProject ↗r/ClaudeAI
Games & hobbiesLLM

Do Not Reply

A horror game where a girl texts you for help and you can type anything back.

6 votes · 31 commentsProject ↗r/SideProject
Creative & entertainment

Cuscocat

A personal website for an orange cat, built in five minutes. Cusco now has a better web presence than most plumbers.

32 votes · 26 commentsProject ↗r/vibecoding
Life & health

CamPage

A document scanner with no subscription that keeps your documents on your phone.

8 votes · 22 commentsProject ↗r/SideProject
Developer tools & agentsClaudeChatGPT

Relaticle

An open-source CRM that Claude and ChatGPT can read and update directly.

5 votes · 26 commentsProject ↗r/mcp
08
By segment

Pick your lane

Developer tools & agents

297 builds this week

One codebase for web, Mac and iPhone. A tool that explains your own vibe-coded app back to you. And a spreadsheet where every cell is a coding agent.

Developer tools & agentsAI agent

exact

Write an app once and it runs natively on the web, macOS and iOS. 3,182 stars.

3,182 stars · 72 commentsProject ↗
Developer tools & agentsClaude Code

Sketchy

Sketchy visually explains what your vibe-coded app actually does, so you can understand your own code again.

371 votes · 58 commentsProject ↗r/vibecodingr/SideProjectr/mcp
Developer tools & agentsClaude CodeCodex

sweet-search

A local code search tool that cuts the token bill for agents like Claude Code and Codex by 5 to 33 percent.

125 votes · 61 commentsProject ↗r/ClaudeCoder/codexr/ClaudeAI
09
Odd and delightful

Things that made us grin