HAP Agent Protocol 0.2.0-rc.1

Changelog

0.2.0-rc.1

• Replace the 0.1 proof-of-concept manifest with a strict HAP agent descriptor.
• Add process/JSONL, HTTP, WebSocket, and HAP-declared A2A 1.0 interfaces.
• Define canonical handshake, Task, Event, Result, and cancellation messages.
• Add measured-or-unavailable usage, actual cost, and W3C trace context.
• Add strict extension, credential, capability, and lifecycle semantics.
• Add descriptor, message, and cross-interface conformance fixtures.

This release intentionally provides no 0.1 compatibility layer.