GOOGLE JUST CHANGED THE GEMINI API AND EVERY APP THAT MISSES THE JUNE 8 DEADLINE WILL BREAK Google activated a breaking change to its Gemini API on May 26 and the countdown clock for developers is now running. The Gemini Interactions API, used for structured multi-step agentic tasks, switched to a new request and response schema as of that date. The old schema is the default no longer. On June 8, Google removes it entirely. Any production application still running the legacy schema will stop working. This is not a deprecation notice with months of runway to plan a migration. It is a hard two-week window between the default switchover and the date when the old schema disappears. For teams with long deployment cycles, compliance review requirements, or code that has not been touched in months, two weeks is not a lot of time. The practical implication for every company running a Gemini-powered application in production: if your product uses the Interactions API for any agentic workflow, you need to check the schema your code is using and migrate now. Google published a migration guide but the burden of catching the deadline falls entirely on the developer. This is also a signal worth reading beyond the immediate technical issue. As AI APIs mature and companies iterate on their architectures, breaking changes will come faster, not slower. The organizations that treat AI integrations as one-time build projects rather than live infrastructure requiring ongoing maintenance are learning that lesson the hard way right now. Keywords: Gemini API breaking change, Google Gemini Interactions API, Gemini API June 8 deadline, Gemini schema migration