Google Antigravity

• Added support for GEMINI_API_KEY, so the CLI can run against the Gemini API directly without signing in. Set modelProvider: "gemini" in settings.json, export GEMINI_API_KEY, and point GOOGLE_GEMINI_BASE_URL at a custom endpoint if you need one. The banner and /help show Gemini API key as the credential, and /logout explains that it comes from the environment rather than appearing to end a session.
• Improved /codesearch resilience by falling back to a local search when the ripgrep binary cannot be executed, such as when an endpoint security agent blocks it.
• Improved artifact list scrolling by caching each file's preview line count, which previously re-read every listed file from disk on every keypress.
• Improved custom agent support by making manage_task available to declarative agents that have not opted out of fundamental components, so a custom agent can list and kill its own background tasks, and reworded its step lines to read Killed task X and Checked task X.
• Improved search_web steps by showing the query while the search is still running rather than only after it returns.

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.

0.1.12 August 13, 2026 Fix proto deserialization regression for ActionGenerateImage output paths The 0.1.12 release fixes a client-side proto deserialization regression in image generation result handling. Improvements (0) Fixes (1) ActionGenerateImage Proto Skew : Resolved client-side deserialization errors where the bundled binary emitted ActionGenerateImage.output_path while the shipped Python proto lacked the corresponding field, ensuring robust protobuf parsing across image generation steps. Patches (0) 0.1.11 August 11, 2026 Default Gemini 3.7 Flash upgrade, session budget limits, Vertex AI Express Mode, and autonomous behavior modes The 0.1.11 release updates the default model to gemini-3.7-flash , introduces session-level budget enforcement and turn termination stop reasons, Vertex AI Express Mode authentication, and an autonomous agent behavior setting. It also expands tool hook metadata, resolves string annotation coercion for postponed evaluation, and improves MCP server and subagent stability. Improvements (6) Default Model Upgrade to Gemini 3.7 Flash : Upgraded the default inference model to gemini-3.7-flash . Session Budget Enforcement & Stop Reasons : Added

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

• Added a heading outline to the artifact viewer, opened with t, so a long markdown document's structure is visible at a glance and you can jump straight to a section instead of scrolling.
• Added non-interactive answers for more read-only slash commands in print mode, so -p "/permissions", /hooks, /help, /changelog and /config each emit one tab-separated record per line — or a structured payload under --output-format json and stream-json — without starting an agent turn, spending quota or leaving a conversation behind, with /help listing exactly the commands print mode answers and /changelog printing the release notes.
• Added machine-readable output to the models and agents subcommands through an --output-format flag accepting json and stream-json, and moved their error messages and progress spinner off stdout so captured output contains only the list.
• Added a disable-slash-command: true flag for a skill's SKILL.md frontmatter, which hides that skill from the / menu and from /name resolution while leaving it discoverable and invocable by the model, so a large skill library no longer floods the command menu.

0.1.11 August 11, 2026 Default Gemini 3.7 Flash upgrade, session budget limits, Vertex AI Express Mode, and autonomous behavior modes The 0.1.11 release updates the default model to gemini-3.7-flash , introduces session-level budget enforcement and turn termination stop reasons, Vertex AI Express Mode authentication, and an autonomous agent behavior setting. It also expands tool hook metadata, resolves string annotation coercion for postponed evaluation, and improves MCP server and subagent stability. Improvements (6) Default Model Upgrade to Gemini 3.7 Flash : Upgraded the default inference model to gemini-3.7-flash . Session Budget Enforcement & Stop Reasons : Added BudgetConfig to define session-level usage limits (total tokens, turns, and cost) and StopReason enum ( BUDGET_EXCEEDED , TURN_LIMIT , USER_CANCELLED , etc.) to inspect turn termination causes. Vertex AI Express Mode Support : Added native support for Express Mode authentication via VertexEndpoint(api_key=...) and LocalAgentConfig(vertex=true, api_key=...) , simplifying headless and non-GCP deployments. Autonomous Agent Behavior Mode : Control the agent's behavior with AgentBehavior . By default the SDK now has an

• Added a Vim editing mode, off by default and switched on from /settings under Editor Mode, bringing modal editing to the prompt with Normal, Insert, Visual and Visual Line modes, a mode badge in the status line and a Vim tab in /help, and covering the h/j/k/l, w/b/e and W/B/E motions, the 0/^/$/gg/G boundaries, the f/F/t/T character searches with their ; and , repeats, the i/a/I/A insert entries, the d/c/y operators alongside x, D and C filling the unnamed register for p, and the iw/aw/iW/aW/ip/ap text objects.
• Added Vim-aware submission so a prompt can be sent without leaving modal editing, through an Editor Mode > Insert First toggle that opens the prompt in Insert mode where a bare Enter submits and a modified key such as shift+enter or ctrl+j inserts a newline, ctrl+s and ctrl+enter keys that submit from Normal mode, an Enter binding available as vim.insert.submit, and the full set of vim.* scopes in keybindings.json for remapping any of it.

0.1.10 August 4, 2026 Prioritized inference tiers, real-time token usage streaming, and context-aware hook decorators The 0.1.10 release introduces support for Gemini Prioritized Inference service tiers, real-time token usage event streaming, stateful context-aware hook decorators, and explicit tool call correlation IDs across hook callbacks. It also standardizes default system instruction merging behavior, fixes WebSocket compaction events, and expands local Gemma model documentation. Improvements (10) Gemini Prioritized Inference Service Tier : Configure agents to utilize Gemini Prioritized Inference service tiers for high-priority model execution with automated graceful fallback. Tool Call ID Correlation in Lifecycle Hooks : Inspect call_id attributes on tool executions, errors, and hooks to correlate multi-step tool invocations across lifecycle callbacks. Context-Aware Hook Decorators : Decorate hook handlers ( @hooks.pre_turn , @hooks.post_tool_call , etc.) that optionally accept HookContext as a parameter to maintain state and share data across lifecycle callbacks. ActionCompaction Event Emission & Hook : Track context window compaction notifications over WebSockets and

• Added Business sign-in for Gemini Enterprise accounts, so you can authenticate with a Google Cloud project under Google Cloud terms, use a license seat allocated or auto-assigned from your organization's GE-Standard or GE-Plus subscription, run inference in a chosen region, and have your organization's administrator controls applied to various features.
• Added Workforce Identity Federation sign-in for enterprise users, available as the Use advanced SSO config option on the Google Cloud sign-in screen, so organizations that federate identity through an external provider can authenticate with their own identity provider.
• Added sign-in with Application Default Credentials so you can use Agent Platform.
• Added a non-blocking advisory banner when the same conversation is already open in another CLI instance on the same machine, pointing at /fork so two sessions no longer interleave writes into one trajectory.
• Improved the terminal sandbox by granting read-only rather than writable access to a Git repository's .git directory, so the agent can inspect repository metadata without being able to rewrite it from inside the sandbox.

• Added slash-command and skill expansion to print mode, so a headless run such as -p "/my-skill review this diff" now resolves and applies the skill instead of sending it as literal text, with --disable-slash-commands to opt out.
• Improved interactive startup so a slow or hanging MCP server no longer stalls the first agent turn, loading MCP servers in the background for the interactive session while headless and one-shot runs keep blocking so their single scripted turn still sees the full toolset.
• Improved permission grants so a pattern approved at a prompt is recorded for the rest of the conversation, letting later commands that match it run without prompting again.
• Improved the default system temporary-directory grant to cover writes as well as reads, so agents no longer trigger a permission prompt when creating or updating files there.
• Fixed stop hooks that always block hanging the agent forever; after a configurable number of consecutive continuations, the hook can no longer block and the turn ends normally.
• Fixed PostToolUse hooks firing on non-tool steps such as user input and model responses, which also caused them to ignore their configured matchers.

• Print mode (-p / --print) now supports structured, machine-readable output via the --output-format flag (text (default), json, or stream-json), so headless runs in CI, eval harnesses, and scripts can consume the CLI's output programmatically; these flags are now discoverable in --help.
• Added the stream-json output format: a strongly-typed NDJSON event stream that emits typed init, step_update, and terminal result events with a stable, closed-vocabulary step_type discriminator, so consumers receive progress incrementally instead of waiting for the whole run to finish.
• Added the --json-schema flag to enforce a custom JSON schema on the structured output, accepting either an inline schema string or a path to a schema file; for stream-json the schema applies to the final result event.
• Enriched the structured stream with a tool_info object for each tool call (canonical tool name, parameters, and output) and a subagent_info payload for delegated subagents (including conversation_id and log_uri) so consumers can correlate child trajectories.

0.1.9 July 27, 2026 Model-call retry/backoff configuration, LiteRT warm-up scaling, and tool execution error handling Release 0.1.9 of the Google Antigravity Python SDK adds model-call retry/backoff configuration, improves tool registration for custom functions, adds missing BuiltinTools exports, fixes user audio payload processing, and adds connection DebugConfig support along with ToolExecutionError handling. Improvements (5) Model-Call Retry & Backoff Configuration : Exposes configurable retry and backoff parameters in LocalAgentConfig for model calls. LiteRT Warm-up Timeout Scaling : Dynamically scales LiteRT engine warm-up timeouts based on context size and synchronizes warm-up cleanup. Improved Tool Registration : Enhances automatic tool registration and docstring parsing for custom Python functions. BuiltinTools Typing Exports : Exports BuiltinTools at top-level package and typing boundaries for subagent tool configuration. Connection DebugConfig : Adds base DebugConfig options for enhanced connection debugging and logging. Fixes (2) Audio Payload Processing : Fixes processing for user audio payloads in interactive agent sessions. ToolExecutionError Handling : Introduces

• Improved permission prompts for compound shell commands so the full command is shown when any part of it needs approval.
• Fixed disabled plugins still running their hooks and contributing other customizations, which could keep a broken hook active and break file-editing tools even after the plugin was turned off.
• Fixed MCP OAuth against providers that do not strictly follow the spec (such as Salesforce and Atlassian) by relaxing issuer validation and including the refresh_token grant.
• Fixed /btw failing with a "parent conversation not found" error when used as the very first action in a fresh session.
• Fixed clipboard corruption of CJK and other non-ASCII text when copying on Windows.
• Fixed print mode (-p) sending a prompt before the account-eligibility check finished.

• Custom Agents (Markdown Format). Added support for defining custom agents using Markdown files (agent.md) with YAML frontmatter and H1-delimited system prompts. Markdown agents support mainAgent, subagent, hidden, inheritMcp, and commandExecutionPolicy frontmatter fields for fine-grained control over agent behavior. Dynamically defined subagents (via define_subagent) now also write Markdown format so they resolve correctly on external builds.
• Added an optional index argument to /copy so /copy <n> copies the n-th most recent response to the clipboard, while /copy and /copy 1 still copy the latest.
• Improved /codesearch to render results progressively as they stream in, showing a live count while loading and letting you cancel an in-flight search with Esc instead of blocking until the whole search finishes.
• Improved default file access by granting read access to the system temporary directory out of the box, resolved correctly per platform, so agents no longer trigger permission prompts when reading temporary files.

• Added a /effort command to view and change the current model's reasoning effort, with a left/right timeline-gauge picker and a direct /effort <level> form so you can trade latency for depth on the fly.
• Added an --effort flag to select a model's reasoning-effort variant when launching the CLI.
• Added stable, user-facing model slugs that appear in the /model picker and are accepted by --model, so you can pin a specific model reliably across sessions.
• Added a model option to custom agent frontmatter so an agent runs at a chosen model tier (such as flash or pro) when invoked as a subagent, defaulting to inherit (the parent's model).
• Redesigned the /model picker to group models by their base model and choose reasoning effort from a timeline gauge navigable with Left and Right, and added an effort badge to the status line for models that expose multiple effort variants.
• Improved the /settings (/config) panel by making it a bounded, scrollable list so it renders correctly in short terminals instead of overflowing, and stopped it from flickering when opening and closing dropdowns.