Hackathons

15 entries

Event reports: the arena, the constraint, what shipped under pressure, the result, and what carried forward into the product.

Oct 7, 2026

"Build an Agent" Hackathon

Corgi Ads · Corgi Cafe, San Francisco

Built Corgi Ads with Zen in three and a half hours. An ad agent you talk to. It studies competitor ads, makes the creative, stages it on Meta and proposes where the money should go. You approve; it acts.

"Build an Agent" Hackathon image
Sep 26, 2026

JEVathon, TypeSafe AI × AI Collective

JEVgotiator · CodeRabbit, San Francisco

Built JEVgotiator with Chris and Dara in a three-hour window. Text an agent the Tesla you want. Code applies the hard limits, Jev scores up to 30 candidates, and you get five picks and a plan for the deal.

JEVathon, TypeSafe AI × AI Collective image
Sep 12, 2026

AI Tinkerers Agents Everywhere

AgentTalkie · San Francisco

Built AgentTalkie, one conversation for directing a growing fleet of document, research, and coding agents, with every action tied to a visible result and receipt.

AI Tinkerers Agents Everywhere image
Sep 8, 2026

GPT-6 Astra Hackathon SF

WorldKinetics · OpenAI, San Francisco

Built WorldKinetics at OpenAI: a prompt-to-product workflow where Astra authors editable geometry, independent checks protect requirements, and the user approves the exact revision.

GPT-6 Astra Hackathon SF image
Jun 27, 2026

2026 AI Engineer World's Fair Hackathon

reSKILL · Shack15, San Francisco

Built reSKILL solo at the AI Engineer World's Fair, a sealed replay gate for self-improving agents. A skill rewrite gets promoted only if it fixes the target failures without breaking a single held-out case.

May 27, 2026

OpenAI Voice Hack Night, Cerebral Valley

Scriber · San Francisco

Built Scriber, a two-agent voice architecture for live standup facilitation. One agent runs the meeting in voice and mutates the Linear board live; a second silent agent remembers across standups and whispers guidance.

OpenAI Voice Hack Night, Cerebral Valley image
May 24, 2026

Cerebral Valley I/O 2026 Hackathon

Timbre · San Francisco

Built Timbre, a multi-agent content engine for technical founders. Two agents fight so the founder's voice survives a long agentic pipeline, and a Verify pass catches the moment style-transfer turns a fact into a lie.

Cerebral Valley I/O 2026 Hackathon image
May 16, 2026

Cerebral Valley × Rosewood Hospitality 2030 Hackathon

first place
Red Thread · Rosewood Sand Hill, Menlo Park

First place. Built Red Thread, a hospitality concierge concept rooted in Rosewood's "Sense of Place" thesis.

Cerebral Valley × Rosewood Hospitality 2030 Hackathon image
May 2, 2026

3rd Annual National Security Hackathon (Army xTech)

DarkMesh · Shack15, Ferry Building, San Francisco

Built with team Altiair. Tactical edge-mesh coordination for DDIL environments. A decentralized sensor mesh fuses weak field signals into one human-reviewed cue, survives node loss, and syncs the mission record back to Palantir Foundry. Live on a Jetson Nano, three Raspberry Pis, and an iPad chest computer.

3rd Annual National Security Hackathon (Army xTech) image
Apr 29, 2026

AWS Builder Loft, "Build YC's Next Unicorn" Agent Hack Day

top 6 finalist
LoopOS · AWS Builder Loft, SF

Top 6 finalist. Built LoopOS, a multiplayer MCP-native agent that replaces the back office for short-term rental operations.

AWS Builder Loft, "Build YC's Next Unicorn" Agent Hack Day image
Apr 19, 2026

Gemma 4 Voice Agents Hackathon

Marginalia · YC HQ

On-device voice agent for smart glasses. Gemma 4 + Cactus + Even Realities G2. Zero cloud, full inference loop runs on the wearable.

Apr 11, 2026

Blaxel × Codex × Redis AI Hack Day

AgentMES · Wordware HQ, San Francisco

Built AgentMES, a manufacturing execution system for autonomous agents. OpenAI's 7-stage AI-Native Engineering Workflow as a bipartite state machine, agents do throughput work, humans own the judgment gates.

Apr 10, 2026

DataHub × Nebius Hackathon

first place
Data-OnCall · Entrepreneur First, SF

First place. 4-agent incident response team for data quality bugs, fine-tuned Llama 3.1 + LoRA for NL→GraphQL, end-to-end in 54.8s at ~2¢/run.

DataHub × Nebius Hackathon image
Mar 28, 2026

Ralphthon SF, sponsored by OpenAI

AgentForge · Weights & Biases, San Francisco

Built AgentForge solo at Ralphthon, where laptops close and agents code alone for three hours. Codex builds one feature at a time, a separate Claude evaluator grades it, and only the harness can commit. 29 of 30 features shipped.

Mar 15, 2026

Nebius.Build SF

first place
Injester · SHACK15, San Francisco

First place. Built the earliest Injester prototype, agent-to-merchant commerce infrastructure. Demoed at NVIDIA GTC the following Tuesday.

Nebius.Build SF image