Hackathons

9 entries

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

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 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