Agent-to-Agent Protocols in 2026: A2A Reached 1.0, Three ACPs Died or Merged, and MCP Learned to Do Most of the Same Job
What Google's Agent2Agent protocol actually specifies at v1.0, what changed when it moved into the Agentic AI Foundation in August, which vendors have shipped it versus announced it, how MCP's July 2026 revision reproduced A2A's task lifecycle almost state for state, the first real CVE on an A2A surface, what the production data says about how rare multi-hop agent systems are, and a working server and client on the 1.1 SDK with the breaking changes listed.
14 minSep 7, 2026Who Is This Agent? Non-Human Identity in 2026, From the RFCs to the Breaches
Machines outnumber humans 109 to 1 in the enterprise directory, the OAuth working group has 70 drafts in flight, MCP just deprecated dynamic registration, and an agent with an over-scoped token deleted a production database in nine seconds. What actually standardised this year, what shipped, and the delegation chain I would build.
16 min