diff --git a/Cargo.toml b/Cargo.toml
index a9e03f4..6ef6f4a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "secret-agent"
 version = "0.1.0"
 edition = "2024"
-description = "Rust TUI/CLI wrapper for Claude, Gemini, Codex, and Copilot with SQLite history"
+description = "Rust TUI/CLI wrapper for Claude, Antigravity, Codex, and Copilot with SQLite history"
 
 [dependencies]
 anyhow = "1.0"
diff --git a/scripts/package_deb.py b/scripts/package_deb.py
index 7e72635..65c63e9 100755
--- a/scripts/package_deb.py
+++ b/scripts/package_deb.py
@@ -19,7 +19,7 @@ except ModuleNotFoundError as exc:  # pragma: no cover - hard failure on old Pyt
 REPO_ROOT = Path(__file__).resolve().parents[1]
 DEFAULT_OUTPUT_DIR = REPO_ROOT / "target" / "debian"
 DEFAULT_DESCRIPTION = (
-    "Rust TUI/CLI wrapper for Claude, Gemini, Codex, and Copilot with SQLite history"
+    "Rust TUI/CLI wrapper for Claude, Antigravity, Codex, and Copilot with SQLite history"
 )
 DEFAULT_MAINTAINER = "Secret Agent Maintainers <noreply@example.com>"
 
diff --git a/src/adapters.rs b/src/adapters.rs
index 85b7434..6397aa1 100644
--- a/src/adapters.rs
+++ b/src/adapters.rs
@@ -20,7 +20,7 @@ pub struct CommandSpec {
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum OutputMode {
     PlainText,
-    GeminiJson,
+    AgyJson,
     CodexJson,
 }
 
@@ -63,7 +63,7 @@ pub fn build_command(request: &AgentRequest) -> Result<CommandSpec> {
             args.push(composed_prompt);
             tool_conversation_id_hint = Some(tool_conversation_id);
         }
-        ToolKind::Gemini => {
+        ToolKind::Agy => {
             args.push("-p".to_string());
             args.push(composed_prompt);
             args.push("--output-format".to_string());
@@ -73,7 +73,7 @@ pub fn build_command(request: &AgentRequest) -> Result<CommandSpec> {
                 args.push(model.to_string());
             }
             args.extend(collect_extra_args(role, &request.extra_args)?);
-            output_mode = OutputMode::GeminiJson;
+            output_mode = OutputMode::AgyJson;
         }
         ToolKind::Codex => {
             args.push("exec".to_string());
@@ -129,7 +129,7 @@ pub fn tool_notes(tool: ToolKind) -> &'static str {
         ToolKind::Claude => {
             "supports model and effort directly; role markdown can be injected as a system prompt"
         }
-        ToolKind::Gemini => {
+        ToolKind::Agy => {
             "supports model directly; role markdown is prepended to the task prompt"
         }
         ToolKind::Codex => "supports model directly; role markdown is prepended to the task prompt",
diff --git a/src/main.rs b/src/main.rs
index 67b1323..e070091 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -24,7 +24,7 @@ use uuid::Uuid;
 #[derive(Debug, Parser)]
 #[command(name = "secret-agent")]
 #[command(
-    about = "Rust TUI/CLI wrapper for Claude, Gemini, Codex, and Copilot with SQLite history"
+    about = "Rust TUI/CLI wrapper for Claude, Antigravity, Codex, and Copilot with SQLite history"
 )]
 struct Cli {
     #[arg(long, global = true)]
diff --git a/src/models.rs b/src/models.rs
index 72dec63..fc322b8 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -15,7 +15,7 @@ const CLAUDE_MODELS: &[&str] = &[
     "claude-haiku-4-5",
 ];
 
-const GEMINI_MODELS: &[&str] = &[
+const AGY_MODELS: &[&str] = &[
     "auto",
     "gemini-2.5-pro",
     "gemini-2.5-flash",
@@ -90,7 +90,7 @@ fn is_model_available(tool: ToolKind, model: &str) -> bool {
         ToolKind::Claude => {
             CLAUDE_MODELS.contains(&normalized.as_str()) || matches_claude_model_name(&normalized)
         }
-        ToolKind::Gemini => GEMINI_MODELS.contains(&normalized.as_str()),
+        ToolKind::Agy => AGY_MODELS.contains(&normalized.as_str()),
         ToolKind::Codex => CODEX_MODELS.contains(&normalized.as_str()),
         ToolKind::Copilot => COPILOT_MODELS.contains(&normalized.as_str()),
     }
diff --git a/src/runner.rs b/src/runner.rs
index 02a9495..f5a60a5 100644
--- a/src/runner.rs
+++ b/src/runner.rs
@@ -92,7 +92,7 @@ async fn run(
                 internal_tx.clone(),
             ));
         }
-        OutputMode::GeminiJson | OutputMode::CodexJson => {
+        OutputMode::AgyJson | OutputMode::CodexJson => {
             tokio::spawn(read_structured_stream(
                 stdout,
                 command_spec.output_mode,
@@ -279,7 +279,7 @@ fn parse_structured_line(output_mode: OutputMode, line: &str) -> Result<ParsedSt
     let value: Value = serde_json::from_str(line)?;
     let tool_conversation_id = find_tool_conversation_id(output_mode, &value);
     let display_text = match output_mode {
-        OutputMode::GeminiJson => extract_gemini_display_text(&value),
+        OutputMode::AgyJson => extract_agy_display_text(&value),
         OutputMode::CodexJson => extract_codex_display_text(&value),
         OutputMode::PlainText => None,
     };
@@ -290,7 +290,7 @@ fn parse_structured_line(output_mode: OutputMode, line: &str) -> Result<ParsedSt
     })
 }
 
-fn extract_gemini_display_text(value: &Value) -> Option<String> {
+fn extract_agy_display_text(value: &Value) -> Option<String> {
     let event_type = value
         .get("type")
         .and_then(Value::as_str)
@@ -358,7 +358,7 @@ fn extract_codex_display_text(value: &Value) -> Option<String> {
 
 fn find_tool_conversation_id(output_mode: OutputMode, value: &Value) -> Option<String> {
     let keys = match output_mode {
-        OutputMode::GeminiJson => &["session_id", "sessionId"][..],
+        OutputMode::AgyJson => &["session_id", "sessionId"][..],
         OutputMode::CodexJson => &["thread_id", "threadId", "session_id", "sessionId"][..],
         OutputMode::PlainText => return None,
     };
@@ -469,15 +469,15 @@ mod tests {
     }
 
     #[test]
-    fn parses_gemini_session_id() {
+    fn parses_agy_session_id() {
         let parsed = parse_structured_line(
-            OutputMode::GeminiJson,
-            r#"{"type":"init","session_id":"gemini-session-1"}"#,
+            OutputMode::AgyJson,
+            r#"{"type":"init","session_id":"agy-session-1"}"#,
         )
         .expect("structured line should parse");
         assert_eq!(
             parsed.tool_conversation_id.as_deref(),
-            Some("gemini-session-1")
+            Some("agy-session-1")
         );
     }
 
diff --git a/src/storage.rs b/src/storage.rs
index 5d70ca7..648fcfd 100644
--- a/src/storage.rs
+++ b/src/storage.rs
@@ -435,7 +435,7 @@ impl ConversationDraft {
 fn parse_tool(tool: String) -> rusqlite::Result<ToolKind> {
     match tool.as_str() {
         "claude" => Ok(ToolKind::Claude),
-        "gemini" => Ok(ToolKind::Gemini),
+        "agy" => Ok(ToolKind::Agy),
         "codex" => Ok(ToolKind::Codex),
         "copilot" => Ok(ToolKind::Copilot),
         _ => Err(rusqlite::Error::FromSqlConversionFailure(
diff --git a/src/types.rs b/src/types.rs
index 1ea2233..0e92ca2 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -9,7 +9,7 @@ use serde::{Deserialize, Serialize};
 #[serde(rename_all = "snake_case")]
 pub enum ToolKind {
     Claude,
-    Gemini,
+    Agy,
     Codex,
     Copilot,
 }
@@ -17,7 +17,7 @@ pub enum ToolKind {
 impl ToolKind {
     pub const ALL: [ToolKind; 4] = [
         ToolKind::Claude,
-        ToolKind::Gemini,
+        ToolKind::Agy,
         ToolKind::Codex,
         ToolKind::Copilot,
     ];
@@ -25,7 +25,7 @@ impl ToolKind {
     pub fn command_name(self) -> &'static str {
         match self {
             ToolKind::Claude => "claude",
-            ToolKind::Gemini => "gemini",
+            ToolKind::Agy => "agy",
             ToolKind::Codex => "codex",
             ToolKind::Copilot => "copilot",
         }
@@ -40,7 +40,7 @@ impl fmt::Display for ToolKind {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let label = match self {
             ToolKind::Claude => "Claude",
-            ToolKind::Gemini => "Gemini",
+            ToolKind::Agy => "Antigravity",
             ToolKind::Codex => "Codex",
             ToolKind::Copilot => "Copilot",
         };