@kevin_chen642

GuardianRail is a representation-aware action firewall for open-weight customer-operations agents. The project shows a regulated support agent running on Gemma 3 12B IT with Gemma Scope 2 sparse-autoencoder features monitored during inference on AMD MI300X. Instead of only checking the final text response, GuardianRail displays the operation the agent is about to take, reads internal safety-relevant features, gates that proposed action, and logs the evidence behind every allow, block, or escalation. In the demo, a normal support request is allowed, a prompt-injection attempt is blocked before a restricted action can run, and a social-engineering request is escalated to human review. The Streamlit interface shows live safety signals, feature thresholds, the Action Firewall decision, policy-layer clamp/boost interventions, GPU usage, and a SQLite audit trail. The goal is not to claim jailbreaks are solved; it is to make open-weight agent safety observable, tunable, and auditable for teams deploying agents on their own infrastructure.

HayStack turns online writing into a paid knowledge market for AI agents. Writers can publish or import articles from RSS, configure per-post access policies, and earn whenever an AI agent reads the full article. Humans can still discover and read open or AI-metered content, while agents encounter an x402-style payment flow that requires payment before full access. The platform has two main surfaces. HayStack Publisher gives authors a Substack-like editor, RSS import flow, per-post paywall controls, and a dashboard showing human revenue, AI read revenue, and live settlement events. HayStack Agent is a Gemini-powered research agent that searches article previews for free, evaluates relevance against a budget, pays for selected full reads, and synthesizes an answer with citations. For payments, HayStack uses Circle Developer-Controlled Wallets on Arc testnet. A funded agent treasury wallet pays the writer’s Arc testnet wallet per read in USDC. The backend stores Circle provider transaction IDs, settlement status, and Arc transaction hashes, then streams settlement events to the frontend via SSE. The article API implements x402-shaped behavior: unpaid agent reads receive HTTP 402 with preview and payment metadata, while successful payments return a signed X-Payment receipt that unlocks full content. This is not a RAG demo over a static corpus. HayStack is a live economic loop for agentic content access: search is free, full reads are paid, writers control pricing, and value moves through real sponsor rails.

Grab your ideas, spin up compute, and start building what’s next! Start with $100 in AMD Developer Cloud credits and begin building right away. Get access to hands-on tutorials, workshops, and curated learning resources to help you build faster and go further. To unlock credits and join the hackathon, sign up for the AMD AI Developer Program. 🤝 Go solo or team up — ship something real. 💰 $21,500+ total prize pool & 1 × AMD Radeon™ AI PRO R9700 GPU up for grabs. 📍 On-site Venue (May 9-10): MindsDB SF AI Collective 3154 17th St, San Francisco, California, USA 📍On-site participation is by invitation only. Travel and accommodation expenses will not be covered. 🧑‍💻 Developers, builders, and innovators - bring your boldest ideas and let’s turn them into real AI systems on AMD.

In this hybrid hackathon powered by Arc and Circle, developers will build the next generation of Agentic economic applications using Circle’s Nanopayments infrastructure with settlement on Arc in USDC. For the first time, high-frequency, usage-based transactions between users, APIs, and AI agents can operate without gas overhead eroding margin. Arc provides stablecoin-native settlement with predictable, dollar-denominated USDC fees and deterministic, sub-second finality — enabling real-time coordination and economically viable per-action pricing at scale. 📅 April 20 – 26, 2026 • Apr 20 – 25 (Online): Submit projects by Apr 25. • Apr 25 (On-site Build – SF, CA): Teams refine projects. • Apr 26 (On-site Demos & Awards – SF, CA): Live pitches & winners announced. Get guidance from Arc and Circle experts through on-site support. 📍 On-site Venue (April 25-26): MindsDB SF AI Collective 3154 17th St, San Francisco, California, USA 🤝 Go solo or team up, it's your flow. 🏆 Compete for a $15,000+ Prize Pool. 📍 Please note: If approved for the on-site experience, you’ll also have the opportunity to showcase your project live. Travel and accommodation will not be covered. 🧑🏻‍💻 Secure your spot now – sign up before the Kick-Off Stream!