Sprint 4: protocols package init

purpose_agent/protocols/__init__.py

@@ -0,0 +1,23 @@
+"""
+Purpose Agent Protocols — Interoperability layer for v3.0.
+
+Bridges Purpose Agent with external ecosystems:
+  - MCP: Model Context Protocol (agent ↔ tools)
+  - A2A: Agent-to-Agent protocol (agent ↔ agent)
+  - AG-UI: Agent-to-Frontend streaming protocol
+  - AGENTS.md: Repo-local agent instruction standard
+  - ANP: Agent Network Protocol (optional discovery)
+
+All protocols are optional extras — no mandatory dependencies added.
+"""
+from purpose_agent.protocols.mcp_bridge import MCPToolBridge
+from purpose_agent.protocols.a2a import AgentCard, A2AClient
+from purpose_agent.protocols.agui import AGUIAdapter
+from purpose_agent.protocols.agents_md import AgentsConfig, parse_agents_md
+
+__all__ = [
+    "MCPToolBridge",
+    "AgentCard", "A2AClient",
+    "AGUIAdapter",
+    "AgentsConfig", "parse_agents_md",
+]