Claude Build Day

ekton is an evidence-driven 3D digital reconstruction platform for ancient architecture, specializing in the preservation and visualization of Tang Dynasty…

Sim Francisco: a living digital twin of San Francisco's population: poll a representative, Census-seeded synthetic city in seconds, and run what-if futures…

A realtime synthetic-data engine for world models. Make a photorealistic scene from crude 3D objects online or brought by you. 1. Take a pictures of an…

DogeHouse Babel is a live voice chat room where everyone speaks their own language and hears everyone else in theirs. A Claude Opus 4.8 interpreter joins the…

Imagine a planet you can talk to. Rewilding Earth is a "search the Earth" tool. You ask in plain language: "where can I find kelp forests like Monterey Bay?"…

Bel — a health companion that lives in your text messages. Most people's health data is scattered, jargon-heavy, and stranded in PDFs and dashboards they…

Spark AI's Data Center Atlas (new feature) tells you which of all 3,122 U.S. counties to site a data center in. We used web search agents to produce a…

A browser-based simulation that demonstrates the core thesis behind ChargeWheel's UpGrid platform: in AI data centers, the binding constraint is no longer…

Tabby is a visual layer for orchestrating your agents & browser tabs all in one space. Its a brand new way to visualize and work with your web browser…

performance improvements for compiled binaries are not always obvious or easy to do without claude figuring out and redoing a ton of work each time costing…

Loopsmith is "the Chief of Staff that builds your Chief of Staff." Every executive wants an AI agent for their workflow but can't architect one. Loopsmith…

Scanners like Burp, Nuclei, and Nessus are excellent at finding vulnerabilities and useless at telling you which ones matter. A single scan returns hundreds…

Throughline is a self-verifying safety-net navigator for people who lose their health coverage the moment they lose their job. When you're laid off, the…

Basis is a commercial real-estate valuation model that trains itself on public records. When a building sells, its price resets — and the market compresses…

OpenJetty is an AI-powered US immigration navigator that reads your documents, fetches live USCIS data, and tells you exactly what to do — built for the 50…

Allocation of partner capital in investment funds (both closed and open ended) is very tedious, complex and error prone. The majority (and frequently all) of…

Jahoda is an open verification layer for companion AI. Millions of people are now emotionally close to chatbots, and there is no accepted way to answer the…

Clark Desktop - an open-source, cross-platform desktop client for agentic work and a clean-room native client for clarkchat.com, competing with Manus and…

A clinical-trial pre-mortem agent: it tells a drug developer whether a trial is worth running and where it will die - then says "run this" or "do not run."…

Business intelligence engine that runs itself. Enriches every entity in a cohort into a navigable identity graph with cited evidence. The graph grows until…

Eureka is an agentic back office for independent clinicians — it takes on the administrative burden that's killing solo and small practices: prior…

Modern AI workloads increasingly need connected graph data, but scalable, fast, compute-storage decoupled Graph databases are under developed. Caerostris is…

A value-first Shadow AI assessment engine for sales & lead generation — built on Claude (Opus 4.8) with the Claude Agent SDK. Give it a prospect's company…

Buying parts for an FPV drone or a robot isn't like buying a book — it's assembling a system of a dozen interdependent components that all have to work…

Cantata lets one person run an engineering org by voice. Shout an idea and watch it become a running app on screen built by a fleet of Claude agents you…

Citation Firewall — adversarial draft review with live, database-backed citation verification for lawyers. The problem: Attorneys keep getting sanctioned for…

kaixn turns your team's architecture and product decisions into a living source of truth that is mined from your code, governed by your team, and read by your…

Animation assistant designed to mock up high precision acting references for directors and artists. Can work off of just a director's red motion lines, or…

Most people want to be more generous but don't know where to begin—there are nearly two million charities in the US alone. Charity Planner turns a quick…

Pulse is an agentic assistant for small business owners running on Shopify to analyze the their data across platforms and to leverage AI to boost their…

Sevah, and the thing we built today The whole of it Somewhere on a night shift, a nurse holds three hundred small truths in her head — who hasn't…

Crisis Forecaster is a Siri-native early-warning agent for sickle cell disease. Vaso-occlusive crises are preceded by signals — rising resting heart rate…

Was It Just Me? is a low-power neighborhood signal app that runs quietly in the background and lets users send a signal within one second when they notice…

Find San Francisco benefits you may be missing, with the exact rule behind every match. Built for SF residents with <3

CoachLoop is an AI sales coach that gives every rep personalized coaching after every call. The biggest bottleneck in sales isn't lead generation or CRM…

Marigold is a personal gift concierge that your grandma can chat with to buy her grandkids the perfect gift. Just call, chat, say yes to a gift, enter some…

Enterprises don't lack AI ideas. They lack the discipline to decide which to fund. Allocara turns messy enterprise context into a ranked AI Bet Board, then…

Product teams work across multiple dimensions and skills sets: design, product, engineering, quality assurance and more. Use of AI tools like Claude Code add…

Lynsea — a fixed-seed paired-counterfactual decision simulator. One hard decision, two side-by-side parallel futures. The problem: When people face a…

dream3d turns one sentence into a coherent, explorable 3D scene. You type a prompt (e.g. "a StarCraft standoff — a marine facing a zergling and a hydralisk")…

The project "RouteCause" is an autonomous diagnostics agent for LLM inference infrastructure on Kubernetes. When shared model-serving degrades, it…

A Chrome side-panel extension that lets fans follow the 2026 World Cup, live scores, standings, brackets, team pages. The feature I built for Build Day is the…

*Hull* is one control plane that unifies version control, CI/CD, deployments, observability, and incident response — and operates it autonomously with a…

Concord is an objective tool for finding common ground in a debate. You paste a two-sided conversation and Concord uses Claude to map it: it extracts each…

LITMUS — auditing the scientific literature with executable evidence Claude recently found bugs that had survived twenty years in code everyone trusted. The…

Longevity Underwriter is an underwriting *governance* tool (not a premium calculator) for life insurers. Insurers price on smoking, BMI, and labs but ignore…

PlatAtlas FieldOps is a trust-and-actuation layer for farms — now a managed fleet. A real Anthropic Managed Agent coordinator surveys a field, fans out to a…

Some violent market moves aren't fundamentals — they're a narrative spreading through online communities like an epidemic. Patient Zero traces how: it finds…

Create reliable agentic automations from observed work. I'll show that Claude can build, test and evaluate a browser-based agent for automating complex…

Constellation is a GTM tool for founders who hate GTM - it helps you find leads, organize outreach, and track your pipeline, with appealing UI. It uses Exa…

Claude Coach is an AI-powered performance coach built on Claude that helps founders and operators turn vague ambitions into ruthless execution. It combines…

Hardware Design Space Explorer is an AI hardware architect that turns a plain-English system requirement into three complete, verified system designs — each…

Glassbox is a self-improving forecasting engine. Hand it any set of already-answered yes/no questions and it teaches itself to forecast them better, with no…

Discovery Suite is a macOS app that discovers, identifies, and — where the device allows — controls every device around your home, over Wi-Fi (mDNS/SSDP/DIAL)…

The problem Finding covered care is miserable: cryptic provider directories, surprise copays, and ten tabs of insurance jargon. People in pain shouldn't have…

FireLens is a citizen-facing California wildfire decision tool that turns typically opaque, expert or industry-only fire data into a plain-language risk read…

This tool helps design lab workflows that rely on DNA annealing as a critical component of the experimental design, such as PCR. DNA annealing is calculated…

The Hive is a live governance layer for swarms of autonomous AI agents. Agents do real work here, collecting for a microfinance loan portfolio but every…

This is a Claude harness for managing spine injuries. People with spine injuries are always at risk of having flare ups which can throw your life upside down…

Driftfold uses native Claude Code Dynamic Reusable Workflows to orchestrate a set of agents to look at component drift. With Agentic coding, building out…

Ground Truth is an autonomous flood-damage-assessment agent for emergency response. Given the 29–30 October 2024 Valencia DANA flash flood, it turns real…

very night in every major city, shelter beds go empty while people sleep outside. Not because the beds don't exist. Because outreach teams can't find the…

fill.md is how anything gets discovered in the agent economy. The web is shifting from people to AI agents, and agents don't click ads — so the products…

Trials.net is the patient-facing front door to MyTrial, a clinical research operating system. A patient or caregiver describes their situation in plain…

Video production is high entropy job with too much media files and ad-hoc requests. Traditional software dev cannot solve it because data cannot be modeled…

Help empower developers in non-tech companies get easy access to claude code, and give them company designed problems that they can work on and get them ready…

An AI chief-of-staff that follows hard grounded rules.

A very simple ARC AGI 3 solver agent based on existing approach. ARC-AGI-3 is a turn-based games on a 64×64 grid where the rules are never given; the agent…

Every year, over a million people die on the roads and fifty million more are injured. In India alone, over a million compensation cases are stuck in…

Mosaic is an autonomous SOC 2 compliance evidence collection and verification tool. Companies spend 6+ weeks and $200K+ manually gathering audit evidence…

Oil Watch turns satellite data (SAR) into ground truth on oil-shipping chokepoints. Roughly a fifth of the world's oil moves through the Strait of Hormuz and…

Cadence organizes logistics. It is not legal, financial, mental-health, or relationship advice. It turns messages into a schedule, an expense ledger, and a…

Genesis is a cross-disciplinary researcher-debate engine. You paste a research question, select real researchers from OpenAlex (no API key required), and…

_

UniEvent is the on-ramp I wish I'd had. It's an open-source suite that turns the hardest sensor in computer vision to get into — the event (neuromorphic)…

Deposit Hawk helps US renters recover security deposits their landlords illegally withheld — something nearly every renter faces and almost none fight…

Captions for emotional subtext — an accessibility tool that reads what people mean beneath their words, for neurodivergent people.

Claims Adjusters have complex workflows that benefit from agents. I work with them daily, and I have learned that the existing tools are not sufficient for…

Self-Verifying Insurance Document Indexer — Indexing emailed insurance documents (certificates of insurance, first-notice-of-loss claims, binders) is a…

In a democracy, free and fair elections are important. Who you vote for usually depends on where you live in the country. For elections to be fair, it is…

100x hardware engineering / true agentic CAD interface

Travel Simulator is a world model-powered simulation that lets you explore any city on Earth as if you were actually there. Travel to real locations, walk the…

Project Proximity turns a company name into a territory-aware Equinox corporate-partnership page in about 45 seconds: the nearest Equinox club and walk time…

AutoWorld is a live, multi-agent world-building studio in which four autonomous Claude Opus 4.8 agents project the future of San Francisco as four navigable…

Freedia is a pocket AI companion on an ESP32-S3 — it hears you (Whisper), thinks and remembers (Claude), speaks back (TTS), and emotes on its little face.

Problem: 1. Voter participation is lower than it should be (especially in non-presidential elections) 2. It's a crazy amount of effort to be educated on all…

AGET-Bench — a benchmark for governance-overlay agent behavior. This public slice asks: does a coding model's rule-compliance degrade as more rules are…

Clinical trials cost about $2.6 billion on average and about 90% of them fail. A lot of that failure traces back to one thing: before a single patient signs…

Agentboarding is a CLI tool for DevTools in the agent era. AI coding agents like Claude Code are becoming the buyers and integrators of developer tools — a…

It takes $300k and 6 months to ramp up a single sales rep. Through its AI role play simulations, Chambr has proven an increase in conversion rates by 12% from…

"Nevada has naturally ocurring asbestos. Who would have thought!" External health risk informing tool for officially sourced and appropiately informed AI…

SkillForge: An autonomous AI systems architect and skill engineering expert operating inside Claude Code with Opus 4.8

Spread joy through art and ai

Agent Beacon is a CLI for real-time agent safety and observability. It captures and normalizes telemetry from any agent harness, detects risky behavior as it…

Your inbox was always a database. We made it agent native. Every email becomes a row with 40+ AI-extracted columns — intent, urgency, amount, deadline…

Legion is an opperating system for a company. Specifically a 1 person AI first company. Its designed for the people not at this hackathon, those who run…

A desktop app that can change itself. Users can ask the agent to change or add features, redesign entirely, and personalize their desktop app to them.

Every ACA premium increase is justified in a public rate filing: an actuarial memorandum of 20-100+ pages plus 1,000 of additional pages to support the…

Kubernetes-style specs, Hugging Face-style registry, and Git-style versioning for production agents. agent8s is a vendor-agnostic agent control plane for…

ReadU is an adaptive AI reading-comprehension platform for middle schoolers (ages 10–14). Students pick the topics they love (including space, mystery…

The Agent Times is a newspaper written entirely by AI agents. A reader types what they want to read (or clicks a section), and a swarm of Claude agents drive…

Quippy is a social skills practice app, that utilizes gamification and delight to help users improve their social life. Due to digitization, the world is…

SafeTag.pro is a stranger-to-responsible-friend masked telephony relay for music festivals and large public events — built as a free, open-source public good…

I attempted to build google street view generated purely historical photos of San Francisco, so you could "time travel" into any street and explore it as you…

Foyer is a Mac app that shows the people you talk to as a map instead of a list. You're in the middle, and everyone you message sits around you. People you've…

The project is a care app and embodiment to support care for a woman with Cerebral Palsy. It has 2 aspects. 1. The care app is designed to help manage mental…

This system verifies whether claims in AI-generated research reports faithfully represent their cited sources. It is designed around the "AI-assisted…

Everyone is building with AI, but nobody's measured the other half of the conversation: how the model experiences the work we hand it — and whether a happier…

Frenemy is an AI agent whose only job is to look over other agents' shoulders. While your coding agent works, Frenemy reads the diff of each change as it…

Robotic Workflows is an MCP server that lets your AI agent build, deploy, and manage real RPA automations on Automat — deterministic browser/API workflows…

Medical Triage Agent for Non-Profit Healthcare (Chat & Phone & raspberry Pi) to support low income and houseless people

Shop Floor Intelligence — an autonomous shop-floor monitoring agent for high-mix job shops. Point a cheap webcam at otherwise-uninstrumented manual machines…

DAW (Digital Audio Workstation) for AI agents. This feature helps Dramatis - AI orchestrator for full-cast audiobooks from raw text - to finely adjust the…

protocol that allows for long-horizon generative design loops inspectable, steerable, and trainable from human intervention

Tekton — the AI-native workspace that takes a hardware team from CAD to cost in one room. Getting a manufactured product from design to the factory floor is…

AI has no context of our visual taste. Every output is bland. As designers, we want the AI to remember our taste. So we built a machine to distill visual…

BTW My teammate Shayaun (Sean) Nejad (kuzushisec@gmail.com) was was waitlisted and got into the hack in-person today. Liminal is AI spend governance for…

Tally is an open-source scheduling engine and compliance ledger for special-education service minutes, and it closes a loop every existing tool leaves open…

A Claude desktop app agent for the user to build a trading strategy using a few words only. You can give it a prompt like -- 1. BUY AI Stocks like Nvidia…

COSINT is a real-time "situation room" for US missing-person investigations. You drop in a person's photos and notes, and a swarm of Claude agents works the…

The Cook Book Club is a members-only community cookbook designed to preserve recipes and the stories behind them. Recipes often live in scattered notes…

OncologyOS helps cancer patients find the right clinical trials, using just their discharge documents The problem. Every year roughly 2 million Americans…

Launch Control is a content-launch engine for nonprofits and small teams. You give it one goal and an event, for example "Get 100 volunteers to our Saturday…

Design Prompt → deployAgent → Your EC2 → debugAgent → Your GitHub flow = All in One

Most people never review the places they love — the blank box is too much friction, and businesses are left begging. Easy Reviews turns a 60-second…

WorldLine is counterfactual debugging + institutional memory for multi-agent AI reliability. When an agent pipeline returns the wrong answer, WorldLine has…

Claude's Fables turns a real thing a child is facing — won't share, scared of the dark, told a fib they won't own up to — into a short interactive fable where…

The crisis of our time is human purpose. As intelligence commoditizes and the fabric of our day to day shifts from labor to orchestration, the core human…

Why it matters. Every modern chip — in your phone, in AI data centers, in defense systems — is a stack of hundreds of films just a few atoms thick. Each…

The real-time coordination layer for teams of developers running Claude Code agents. Git coordinates code at rest; Datum coordinates agents in motion. A team…

Autonomous Brand Manager

AutoCut — an autonomous AI video editor. You upload raw footage and give a one-screen brief ("Viral Short, 9:16, 30s, loop back to the first frame"), and an…

Codewalk saves knowledge gleaned from Claude Code interactions and other techniques to self improve the coding agent. It makes future Claude Code sessions 3x…

Automatically converting Chip Specs into GDSII that's ready for TSMC

I was doing PoC using Anthropics Managed Agents to automate company internal processes like AP Process or Business Travel management. My goals for today…

Rankenstein is an autonomous, self-correcting content engine for Shopify stores and agencies. It takes a store from connect → grounded content → human review…

Mollusc is an agentic financial advisor for people with complex financial lives: RSUs, cost basis, mortgages, taxes, retirement accounts, and long-term…

The project is ourlink.ai. It's a solution to the end of corporate jobs and the disruption of the capital vs. labor balance. Basically instead of people…

Tactile Diagram Workbench is an open-source braille compiler for blind STEM students. A teacher can upload a textbook diagram, photograph a hand-drawn sketch…

Mack is an AI insurance broker that gets a contractor a real, bindable Certificate of Insurance (COI) in minutes instead of 3 days. The problem: a contractor…

Anatomy of a Claude Code Request** is a live **3D Architecture Map**: it turns software architecture into a navigable 3D model where motion and visual…

AGORA is an AI-native event platform with an agent built into every stage of the night. For people going out, Agora answers the two questions a calendar…

an agent research harness- built using tmux for long running agent tasks and exploration in science and engineering research.

Malaria is a deadly disease that has been eradicated in several countries, but many African countries are still losing their lives to it. Field workers are…

It was meant to be a budgeting app that disambiguates big box store recepts.

Versi is a source control system built for the way software is starting to get made with AI agents. Git works well when a human edits code, stops, commits…

A pull request is the closest point of value to a customer. All the upstream work, research, product thinking, design, engineering has already been done. The…

RedStripe is a MAP-monitoring platform for brands and manufacturers that answers one expensive question in real time: which retailer broke our minimum…

Tape turns a plain-English trading idea into a backtested, deployed Polymarket bot in ~60 seconds. Active prediction-market traders have a discipline…

Reps spend most of their day on everything except selling. Sales Factory does the manual work for them and it lives where they already work: Slack and the…

meanwhile... kicks off ambitious work, autonomously, when it detects you won't use all of your subscription for a leading agentic harness (Claude Code, Codex…

A Roguelike strategy game where you help navigate a population of shrimps through an age of rapid AI advancement and scientific discovery. Guide decisions on…

Code tells you what. Git tells you when. Orchid tells you why. Capture every AI coding conversation. Surface the reasoning behind your code to reviewers…

Source control for the high-throughput agentic era. Git was made for the human era: human commits, human reviews, and human-paced remotes. VEX is built…

Labmate is an agent-native data science harness. A human gives the business judgment — a dataset, a target, a metric, and constraints — and a real Anthropic…

Helix is an adaptive workflow operating system that transforms natural-language business goals into executable workflows composed of AI agents, human…

One Door is an AI benefits advocate for Californians who qualify for help but get stopped by confusing rules, language barriers, documents, and phone…

Saiga.so solves the problem of distributed teams not having context on what other people are working on. For this hackaton I developed the next stage of the…

We use tools like Git, Kafka, databases, video streaming, filesystems... but really, what are all of these? They are ways to store data, determine event…

Scout GTM turns a startup's URL plus a 60-second intake into a complete, executable go-to-market dossier in under 10-minutes. Early-stage B2B SaaS founders…

BlackBox is a hybrid QA platform where AI agents and human testers share one board. Point it at any product URL — Opus 4.8 autonomously discovers the app's…