Keyserfaty Introduces Agentcard Vault for Safe Sharing

@keyserfaty posted that an agent bought the wrong flight. The message presents Agentcard Vault as the solution to share cards safely with agents. The post was retweeted by the official Y Combinator account, which is noted in the packet as the company behind many AI startups. No further details on the tool, its features, or launch status are shown in the source lines. The announcement frames the vault as a direct response to the booking mistake described.