Google Antigravity v2.5.5

2.5.5 August 13, 2026 Windows Media Attachments and Chat Responsiveness Improvements Bug fixes addressing media attachment failures on Windows and improving message responsiveness when interacting with the agent. Improvements (0) Fixes (2) Fixed an issue where the agent failed when attaching images or media files on Windows machines. Improved responsiveness and reduced hanging issues when sending messages to the agent. Patches (0) 2.5.2 August 12, 2026 Queued Messages, File Attachments, and Performance Improvements Support for queued messages, plain text, PDF, and markdown file attachments, model thinking level selector, and major conversation performance improvements. Improvements (6) Improved the ask questions panel: clearer option selection, and continue now only activates once you've answered the current question. Added support for queued messages, including settings to configure execution behavior, a "Send Now" option, and an improved input card layout. Added support for attaching and rendering plain text (.txt), pdf (.pdf) and markdown (.md) files in conversations. Added a new built-in Antigravity Guide skill to provide helpful guidance when users ask about Antigravity. Improved the model selector dropdown to choose thinking levels per-model (Low, Medium, High). Updated icons for built-in slash commands and redesigned mentions/slash commands menu alignment in the chat input box. Fixes (2) Opening long conversations is now dramatically faster. Reduced typing lag while the agent streams responses. Patches (0) 2.1.1 June 22, 2026 Model quota screen and agent security fixes New model quota screen, agent permission and security fixes, and MCP stability improvements Improvements (1) Quota screen redesign: clearer, unambiguous view into “used” versus “remaining” credits in the Models tab of the Settings screen. Fixes (4) Fixed Agent Permission Issue: Fixed the bug where changes to the agent security mode were not persisted. Improved MCP server stability: increased re