avianna.ai Notes on math, AI, and software. https://avianna.ai/ 2026-06-08T00:00:00Z Tushar Madan Rishubh Khurana https://avianna.ai/assets/brand/favicon-64x64.png https://avianna.ai/assets/brand/logo-mark.png build_feed.py Why agents need a contract https://avianna.ai/posts/concord-1-why-agents-need-a-contract.html 2026-06-08T00:00:00Z 2026-06-08T00:00:00Z Part 1 of three on Concord. Durable execution tells you what ran. It doesn't tell you what it meant — and that gap matters more now that agents propose work. With an interactive scattered-evidence simulation. The Visible Pursuit https://avianna.ai/post.html?slug=the-visible-pursuit 2026-06-07T00:00:00Z 2026-06-07T00:00:00Z Why every action you take to get what you want tells someone else what you want — goal recognition, with two interactive simulations. Contract, not runtime https://avianna.ai/posts/concord-2-contract-not-runtime.html 2026-06-07T00:00:00Z 2026-06-07T00:00:00Z Part 2 of three. Concord is not DBOS, not LangGraph, not OPA. Three small interactive demos draw the layer boundary: a clickable layer stack, an audit-tier picker, and an SVG capability graph. A day in the life https://avianna.ai/posts/concord-3-day-in-the-life.html 2026-06-06T00:00:00Z 2026-06-06T00:00:00Z Part 3 of three. A hotel booking traced through Concord end-to-end. Animated nine-step playback with three modes — full contract, minimal subset, no Concord at all.