01 · Operational consequence
Lifecycleupcoming
Severityhigh
ConsequenceAfter the scheduled October 5 retirement, the May agent ID may stop working. Local tool handlers require shape changes; remote output-only clients need only the agent ID change.
02 · Affected subjects
Componentsantigravity-preview-05-2026, antigravity-preview-09-2026
AudienceGemini API Interactions clients using antigravity-preview-05-2026, especially local tool integrations and function_call parsers.
RegionGemini API managed agent; no regional exception documented
03 · Detection
Stable event IDksr-google-antigravity-05-2026-2026-10-05
Change typeretirement
04 · Before → after
BeforeDeprecated; the listed shutdown date has not yet passed.
AfterScheduled for retirement on 2026-10-05.
05 · Required action
ActionInventory use of the exact May preview ID. Update to the September preview. Regression-test local tool handlers and function_call parsers where used; remote output-only clients can update the agent ID.
Replacement or migration pathUse antigravity-preview-09-2026. For local tools or parsed function_call steps, adapt tool names, PascalCase arguments and line-range file edits; remote output-only clients can update the agent ID.
06 · Actionable date
Date roleMigration deadline
Date2026-10-05
Statusscheduled; Google lifecycle dates are earliest possible
07 · Kingy reproduction
StatusOfficial-source review; runtime not tested
LimitationsThe lifecycle table’s general earliest-date caveat applies; describe October 5 as scheduled. The tool-shape changes apply to local tools or parsed function_call steps; do not project them onto remote output-only clients. No live integration migration was tested.
08 · Sources and revision
Checked2026-09-22
Official sourceshttps://ai.google.dev/gemini-api/docs/deprecations · https://ai.google.dev/gemini-api/docs/changelog · https://ai.google.dev/gemini-api/docs/antigravity-agent
Correction historyNo corrections recorded.