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Building with Agent Harnesses

This hackathon is about building with agent harnesses: hands-on, alongside the people building the tools.

AFC Auto Fleet Control · Emporio Tower, Hamburg · 5:00 pm to 9:00 pm

Request to join on Luma
AI Hackathon Nights Hamburg: Building with Agent Harnesses, LangChain x hackers&wizards x AXDN
$6,000 in LangSmith credits as prizes
2 h 40 of hacking with the judges in the room
2 talks from LangChain to start

the format

What you will build

Form teams Build a deep agent Judge demo

The theme is agent harnesses: the scaffolding that turns a model into a system that can plan, use tools and recover from its own mistakes.

Steffen Hausmann from LangChain kicks things off with two short talks, one on deep agents and one on managed deep agents. Then you put it into practice.

A few days before the event you receive a prompt so that you can arrive with an idea. The time before the hackathon is worth it once the clock starts.

Together with hackers&wizards we host an evening of talks and hacking in Hamburg. You form a small team, build a deep agent from scratch and demo it to a panel of judges at the end of the night.

built together

Small teams. One evening. One agent.

Laptops open, idea in mind, and off you go. The people behind the tools sit at the table with you.

Impressions from AI Nights in Nuremberg

schedule

Agenda on December 4

  1. Doors open, food and networking
  2. Welcome and theme intro
  3. Talk: Deep agents (Steffen Hausmann, LangChain)
  4. Talk: Managed deep agents (Steffen Hausmann, LangChain)
  5. Hacking, judges circulate and review in the final 30 minutes
  6. Demos, prizes and closing
  7. Event ends

prizes & jury

What you can win

1st place $3,000 in LangSmith credits
2nd place $2,000 in LangSmith credits
3rd place $1,000 in LangSmith credits

Jury: Steffen Hausmann, Deployed Engineer at LangChain · Founder and Co-CEO of hackers&wizards

bring

What you need

  • Your laptop
  • A group to hack with (we help you form one if you come alone)
  • Your own API keys for the models and tools you plan to use
  • Questions for Steffen and the hackers&wizards team, who are around all night

we provide

What you get

  • LangSmith credits for every attendee to trace and debug your agent
  • Food and drinks
  • LangChain stickers and limited swag for everyone who shows up

behind the evening

Who makes the hackathon possible

Host

LangChain

LangChain enables every company to own their intelligence. Its open, model-agnostic harnesses give teams choice and control over how they build their agent architecture.

LangSmith brings testing, deployment and monitoring together so teams can continuously improve their agents and govern them at scale.

  • More than 7,000 customers, including Nvidia, Bridgewater, LinkedIn, Workday, Harvey and Rippling, trust LangSmith, according to LangChain.
  • Steffen Hausmann (Deployed Engineer) gives the talks and sits on the jury.
  • LangChain provides LangSmith credits, prizes, food, drinks and swag.
langchain.com ↗Event on Luma ↗

Co-host

hackers&wizards

hackers&wizards is a Hamburg team of forward deployed agentic engineers. They work inside engineering teams and their codebases so the speed developers gain with agents reaches their customers.

With the Agentic Engineering Factory they build an agent pipeline from idea to deploy together with the team, with deterministic quality gates between the steps.

  • Founded in 2025 in Hamburg by Stefan Munz and Benedikt Stemmildt.
  • Customers such as IONOS, OTTO, dm, XING, Krombacher and SIGNAL IDUNA rely on the Factory.
  • The hackers&wizards team is around all evening to answer your questions.
hackersandwizards.dev ↗LinkedIn ↗

Co-host

AXDN

AXDN//27 is an AI conference: a full day on AI in business on April 22, 2027 at KORN’S in Nuremberg. It comes from the AI Nights family and is limited to 250 tickets.

The program runs in tracks, including AI for Engineers & Dev, AI for Marketing, AI for HR, AI for Executives & Leadership and AI for Business & Entrepreneurs, plus Expo & Partners.

  • April 22, 2027, KORN’S Nuremberg
  • Tracks for engineering, marketing, HR, leadership and business
  • Early bird tickets and the full program at axdn.io
axdn.io ↗

location

AFC Auto Fleet Control

Emporio Tower · Hamburg, Neustadt

We are guests at AFC Auto Fleet Control in the Emporio Tower in Hamburg’s Neustadt district. Based in Hamburg, AFC has offered solutions for commercial fleets since 1998, including damage and risk management.

Thank you to AFC for hosting the evening in their offices.

The exact address and entry information are sent by Luma to confirmed attendees.

questions

Frequently asked questions

How do I register?

Through the event page on Luma. The hosts have to confirm your registration, after that you receive the address.

Do I need to bring a team?

No. If you come alone, we help you form a team on site.

What do I need to prepare?

A laptop and your own API keys for the models and tools you want to use. LangChain provides LangSmith credits for all attendees. A few days before the event you receive a prompt so you can start with an idea.

How is the judging done?

The judges circulate and review the teams in the final 30 minutes of hacking. Demos, prizes and closing follow.

December 4, Hamburg. Coming?

The hosts confirm every seat. Request your spot on Luma now.

Request to join on Luma
December 4 · 5 pm · Hamburg Request to join