April 26, 2026 — Initial public definition
AgentRuntimeSurface.com launches. The site defines Agent Runtime Surface as an application primitive for agent-facing runtime contracts.
Includes:
- a working trip-app demo running in an agentic loop with Claude
- the application vs capability distinction
- positioning against adjacent patterns (MCP, CLI, REST, AG-UI, A2UI)
- the three modes (Semantic UI, Capability, Discoverability)
- what the application provides
- the no-version-negotiation principle
The articles published prior to launch trace the discovery:
- The Missing Layer (March 22, 2026)
- Building an ARS Layer and What It Revealed (April 8, 2026)