AGNTCon + MCPCon Europe 2026

The next phase of agents is not one human supervising one model. It is multi-human, multi-agent work across teams, tools, and trust boundaries. The decisive moments are not model outputs; they are human approvals, edits, overrides, escalations, and handoffs, and the rationale behind them. Today those moments leak into chat logs, tickets, and application code, where they cannot be replayed or audited.

CHAP, the Collaborative Human-Agent Protocol, gives this shared workspace a protocol layer. A small Core (workspaces, participants, tasks, artefacts, and an append-only evidence log) carries composable profiles for review, structured override, operating modes, handoff, deliberation, identity, and signed audit. It composes with MCP and A2A rather than replacing them: MCP connects agents to tools, A2A connects agents to agents, CHAP lets humans and agents do accountable work together.

The talk covers the protocol gap, the Core primitives, a worked 'override as evidence' flow, and lessons from building the open reference implementations and conformance harness. Spec, code, and examples are public.

Paper: https://arxiv.org/abs/2606.09751
Repo: https://github.com/BrightbeamAI/chap