diff --git a/apps/aether-gateway/src/ai_serving/planner/antigravity.rs b/apps/aether-gateway/src/ai_serving/planner/antigravity.rs
new file mode 100644
index 000000000..6dc684ba1
--- /dev/null
+++ b/apps/aether-gateway/src/ai_serving/planner/antigravity.rs
@@ -0,0 +1,169 @@
+use std::collections::BTreeMap;
+use std::sync::Arc;
+
+use serde_json::Value;
+
+use crate::ai_serving::transport::antigravity::{
+    build_antigravity_safe_v1internal_request, build_antigravity_static_identity_headers,
+    classify_local_antigravity_request_support, AntigravityEnvelopeRequestType,
+    AntigravityRequestAuth, AntigravityRequestAuthUnsupportedReason,
+    AntigravityRequestEnvelopeSupport, AntigravityRequestSideSupport,
+    AntigravityRequestSideUnsupportedReason,
+};
+use crate::ai_serving::transport::{
+    build_standard_provider_request_headers, GatewayProviderTransportSnapshot,
+    StandardProviderRequestHeaders, StandardProviderRequestHeadersInput,
+};
+use crate::AppState;
+
+pub(crate) const ANTIGRAVITY_V1INTERNAL_ENVELOPE_NAME: &str = "antigravity:v1internal";
+
+pub(crate) enum AntigravityV1InternalRequestError {
+    TransportUnsupported,
+    EnvelopeUnsupported,
+    UpstreamUrlUnavailable,
+    HeaderRulesApplyFailed,
+}
+
+pub(crate) struct AntigravityV1InternalRequestInput<'a> {
+    pub(crate) state: &'a AppState,
+    pub(crate) parts: &'a http::request::Parts,
+    pub(crate) transport: &'a Arc<GatewayProviderTransportSnapshot>,
+    pub(crate) trace_id: &'a str,
+    pub(crate) mapped_model: &'a str,
+    pub(crate) provider_api_format: &'a str,
+    pub(crate) auth_header: &'a str,
+    pub(crate) auth_value: &'a str,
+    pub(crate) request_headers: &'a http::HeaderMap,
+    pub(crate) original_request_body: &'a Value,
+    pub(crate) gemini_request_body: &'a Value,
+    pub(crate) upstream_is_stream: bool,
+    pub(crate) same_format: bool,
+}
+
+pub(crate) struct AntigravityV1InternalRequest {
+    pub(crate) transport: Arc<GatewayProviderTransportSnapshot>,
+    pub(crate) body: Value,
+    pub(crate) headers: StandardProviderRequestHeaders,
+    pub(crate) upstream_url: String,
+}
+
+pub(crate) async fn build_antigravity_v1internal_provider_request(
+    input: AntigravityV1InternalRequestInput<'_>,
+) -> Result<AntigravityV1InternalRequest, AntigravityV1InternalRequestError> {
+    let payload = build_antigravity_v1internal_payload(
+        input.state,
+        input.transport,
+        input.trace_id,
+        input.mapped_model,
+        input.gemini_request_body,
+    )
+    .await?;
+
+    let upstream_url = crate::ai_serving::build_provider_transport_request_url_for_request_body(
+        &payload.transport,
+        input.provider_api_format,
+        Some(input.mapped_model),
+        input.upstream_is_stream,
+        input.parts.uri.query(),
+        None,
+        Some(&payload.body),
+    )
+    .ok_or(AntigravityV1InternalRequestError::UpstreamUrlUnavailable)?;
+
+    let extra_headers: BTreeMap<String, String> =
+        build_antigravity_static_identity_headers(&payload.auth);
+    let mut headers =
+        build_standard_provider_request_headers(StandardProviderRequestHeadersInput {
+            transport: &payload.transport,
+            provider_api_format: input.provider_api_format,
+            same_format: input.same_format,
+            headers: input.request_headers,
+            auth_header: input.auth_header,
+            auth_value: input.auth_value,
+            extra_headers: &extra_headers,
+            header_rules: payload.transport.endpoint.header_rules.as_ref(),
+            provider_request_body: &payload.body,
+            original_request_body: input.original_request_body,
+            upstream_is_stream: input.upstream_is_stream,
+        })
+        .ok_or(AntigravityV1InternalRequestError::HeaderRulesApplyFailed)?;
+    headers
+        .headers
+        .insert("accept".to_string(), "text/event-stream".to_string());
+
+    Ok(AntigravityV1InternalRequest {
+        transport: payload.transport,
+        body: payload.body,
+        headers,
+        upstream_url,
+    })
+}
+
+struct AntigravityV1InternalPayload {
+    transport: Arc<GatewayProviderTransportSnapshot>,
+    auth: AntigravityRequestAuth,
+    body: Value,
+}
+
+async fn build_antigravity_v1internal_payload(
+    state: &AppState,
+    transport: &Arc<GatewayProviderTransportSnapshot>,
+    trace_id: &str,
+    mapped_model: &str,
+    gemini_request_body: &Value,
+) -> Result<AntigravityV1InternalPayload, AntigravityV1InternalRequestError> {
+    let mut resolved_transport = Arc::clone(transport);
+    let mut antigravity_support = classify_local_antigravity_request_support(
+        &resolved_transport,
+        gemini_request_body,
+        AntigravityEnvelopeRequestType::Agent,
+    );
+
+    if matches!(
+        antigravity_support,
+        AntigravityRequestSideSupport::Unsupported(
+            AntigravityRequestSideUnsupportedReason::UnsupportedAuth(
+                AntigravityRequestAuthUnsupportedReason::MissingProjectId
+            )
+        )
+    ) {
+        if let Some(hydrated) = state
+            .hydrate_antigravity_project_metadata_for_transport(&resolved_transport)
+            .await
+        {
+            resolved_transport = Arc::new(hydrated);
+            antigravity_support = classify_local_antigravity_request_support(
+                &resolved_transport,
+                gemini_request_body,
+                AntigravityEnvelopeRequestType::Agent,
+            );
+        }
+    }
+
+    let auth = match antigravity_support {
+        AntigravityRequestSideSupport::Supported(spec) => spec.auth,
+        AntigravityRequestSideSupport::Unsupported(_) => {
+            return Err(AntigravityV1InternalRequestError::TransportUnsupported);
+        }
+    };
+
+    let body = match build_antigravity_safe_v1internal_request(
+        &auth,
+        trace_id,
+        mapped_model,
+        gemini_request_body,
+        AntigravityEnvelopeRequestType::Agent,
+    ) {
+        AntigravityRequestEnvelopeSupport::Supported(envelope) => envelope,
+        AntigravityRequestEnvelopeSupport::Unsupported(_) => {
+            return Err(AntigravityV1InternalRequestError::EnvelopeUnsupported);
+        }
+    };
+
+    Ok(AntigravityV1InternalPayload {
+        transport: resolved_transport,
+        auth,
+        body,
+    })
+}
diff --git a/apps/aether-gateway/src/ai_serving/planner/mod.rs b/apps/aether-gateway/src/ai_serving/planner/mod.rs
index a58d3bd13..29d86f149 100644
--- a/apps/aether-gateway/src/ai_serving/planner/mod.rs
+++ b/apps/aether-gateway/src/ai_serving/planner/mod.rs
@@ -1,6 +1,7 @@
 use crate::ai_serving::{AiExecutionDecision, AiExecutionPlanPayload, GatewayControlDecision};
 use crate::{AppState, GatewayError};
 
+mod antigravity;
 mod candidate_affinity_cache;
 mod candidate_materialization;
 mod candidate_metadata;
diff --git a/apps/aether-gateway/src/ai_serving/planner/standard/openai/chat/decision/request.rs b/apps/aether-gateway/src/ai_serving/planner/standard/openai/chat/decision/request.rs
index cbfe3a8bb..ffb393206 100644
--- a/apps/aether-gateway/src/ai_serving/planner/standard/openai/chat/decision/request.rs
+++ b/apps/aether-gateway/src/ai_serving/planner/standard/openai/chat/decision/request.rs
@@ -4,6 +4,10 @@ use std::sync::Arc;
 use aether_contracts::ResolvedTransportProfile;
 use serde_json::{json, Value};
 
+use crate::ai_serving::planner::antigravity::{
+    build_antigravity_v1internal_provider_request, AntigravityV1InternalRequestError,
+    AntigravityV1InternalRequestInput, ANTIGRAVITY_V1INTERNAL_ENVELOPE_NAME,
+};
 use crate::ai_serving::planner::candidate_preparation::{
     prepare_header_authenticated_candidate, prepare_header_authenticated_candidate_from_auth,
     OauthPreparationContext,
@@ -27,6 +31,7 @@ use crate::ai_serving::planner::standard::{
     build_local_openai_chat_upstream_url, request_body_build_failure_extra_data,
     request_conversion_failure_extra_data,
 };
+use crate::ai_serving::transport::antigravity::is_antigravity_provider_transport;
 use crate::ai_serving::transport::auth::resolve_local_openai_bearer_auth;
 use crate::ai_serving::transport::kiro::{
     build_kiro_provider_headers, build_kiro_provider_request_body,
@@ -183,6 +188,7 @@ pub(crate) async fn resolve_local_openai_chat_candidate_payload_parts(
         .provider_type
         .trim()
         .eq_ignore_ascii_case("grok");
+    let is_antigravity = is_antigravity_provider_transport(transport);
     let is_gemini_cli = is_gemini_cli_provider_transport(transport);
 
     if is_grok && is_grok_text_provider_api_format(provider_api_format) {
@@ -549,7 +555,9 @@ pub(crate) async fn resolve_local_openai_chat_candidate_payload_parts(
         transport,
         conversion_kind,
     ) {
-        if !(is_gemini_cli && normalized_provider_api_format == "gemini:generate_content") {
+        if !((is_antigravity || is_gemini_cli)
+            && normalized_provider_api_format == "gemini:generate_content")
+        {
             mark_skipped_local_openai_chat_candidate(
                 state,
                 input,
@@ -757,6 +765,28 @@ pub(crate) async fn resolve_local_openai_chat_candidate_payload_parts(
         )
         .await);
     }
+    if provider_api_format == "gemini:generate_content" && is_antigravity {
+        return Ok(build_antigravity_openai_chat_cross_format_payload_parts(
+            state,
+            parts,
+            trace_id,
+            body_json,
+            input,
+            eligible,
+            candidate_index,
+            candidate_id,
+            decision_kind,
+            transport,
+            provider_api_format.as_str(),
+            prepared_candidate.mapped_model,
+            prepared_candidate.auth_header,
+            prepared_candidate.auth_value,
+            provider_request_body,
+            upstream_is_stream,
+            redaction.redacted,
+        )
+        .await);
+    }
 
     let Some(upstream_url) = build_cross_format_openai_chat_upstream_url(
         parts,
@@ -857,6 +887,158 @@ pub(crate) async fn resolve_local_openai_chat_candidate_payload_parts(
     }))
 }
 
+#[allow(clippy::too_many_arguments)]
+async fn build_antigravity_openai_chat_cross_format_payload_parts(
+    state: &AppState,
+    parts: &http::request::Parts,
+    trace_id: &str,
+    original_body_json: &serde_json::Value,
+    input: &LocalOpenAiChatDecisionInput,
+    eligible: &EligibleLocalExecutionCandidate,
+    candidate_index: u32,
+    candidate_id: &str,
+    decision_kind: &str,
+    transport: &Arc<GatewayProviderTransportSnapshot>,
+    provider_api_format: &str,
+    mapped_model: String,
+    auth_header: String,
+    auth_value: String,
+    gemini_request_body: Value,
+    upstream_is_stream: bool,
+    request_redacted: bool,
+) -> Option<LocalOpenAiChatCandidatePayloadParts> {
+    let candidate = &eligible.candidate;
+    let effective_headers = input.effective_headers(&parts.headers);
+    let resolved =
+        match build_antigravity_v1internal_provider_request(AntigravityV1InternalRequestInput {
+            state,
+            parts,
+            transport,
+            trace_id,
+            mapped_model: &mapped_model,
+            provider_api_format,
+            auth_header: &auth_header,
+            auth_value: &auth_value,
+            request_headers: effective_headers,
+            original_request_body: original_body_json,
+            gemini_request_body: &gemini_request_body,
+            upstream_is_stream,
+            same_format: false,
+        })
+        .await
+        {
+            Ok(resolved) => resolved,
+            Err(AntigravityV1InternalRequestError::TransportUnsupported) => {
+                mark_skipped_local_openai_chat_candidate(
+                    state,
+                    input,
+                    trace_id,
+                    candidate,
+                    candidate_index,
+                    candidate_id,
+                    "transport_unsupported",
+                )
+                .await;
+                return None;
+            }
+            Err(AntigravityV1InternalRequestError::EnvelopeUnsupported) => {
+                mark_skipped_local_openai_chat_candidate_with_failure_diagnostic(
+                    state,
+                    input,
+                    trace_id,
+                    candidate,
+                    candidate_index,
+                    candidate_id,
+                    "provider_request_body_build_failed",
+                    CandidateFailureDiagnostic::envelope_build_failed(
+                        "openai:chat",
+                        provider_api_format,
+                        "openai_chat_antigravity_envelope",
+                    ),
+                )
+                .await;
+                return None;
+            }
+            Err(AntigravityV1InternalRequestError::UpstreamUrlUnavailable) => {
+                mark_skipped_local_openai_chat_candidate_with_failure_diagnostic(
+                    state,
+                    input,
+                    trace_id,
+                    candidate,
+                    candidate_index,
+                    candidate_id,
+                    "upstream_url_missing",
+                    CandidateFailureDiagnostic::upstream_url_missing(
+                        "openai:chat",
+                        provider_api_format,
+                        "openai_chat_antigravity_url",
+                    ),
+                )
+                .await;
+                return None;
+            }
+            Err(AntigravityV1InternalRequestError::HeaderRulesApplyFailed) => {
+                mark_skipped_local_openai_chat_candidate_with_failure_diagnostic(
+                    state,
+                    input,
+                    trace_id,
+                    candidate,
+                    candidate_index,
+                    candidate_id,
+                    "transport_header_rules_apply_failed",
+                    CandidateFailureDiagnostic::header_rules_apply_failed(
+                        "openai:chat",
+                        provider_api_format,
+                        "openai_chat_antigravity_headers",
+                    ),
+                )
+                .await;
+                return None;
+            }
+        };
+    let mut provider_request_headers = resolved.headers.headers;
+    apply_codex_openai_responses_special_headers(
+        &mut provider_request_headers,
+        &resolved.body,
+        effective_headers,
+        resolved.transport.provider.provider_type.as_str(),
+        provider_api_format,
+        Some(trace_id),
+        resolved.transport.key.decrypted_auth_config.as_deref(),
+    );
+    request_identity_response_encoding_when_redacted(
+        &mut provider_request_headers,
+        request_redacted,
+    );
+
+    let resolved_report_kind = if decision_kind == OPENAI_CHAT_STREAM_PLAN_KIND {
+        "openai_chat_stream_success".to_string()
+    } else {
+        "openai_chat_sync_finalize".to_string()
+    };
+    let (execution_strategy, conversion_mode) =
+        ai_local_execution_contract_for_formats("openai:chat", provider_api_format);
+
+    Some(LocalOpenAiChatCandidatePayloadParts {
+        client_api_format: "openai:chat".to_string(),
+        auth_header: resolved.headers.auth_header,
+        auth_value: resolved.headers.auth_value,
+        mapped_model,
+        provider_api_format: provider_api_format.to_string(),
+        provider_request_body: resolved.body,
+        provider_request_headers,
+        upstream_url: resolved.upstream_url,
+        execution_strategy,
+        conversion_mode,
+        report_kind: resolved_report_kind,
+        envelope_name: Some(ANTIGRAVITY_V1INTERNAL_ENVELOPE_NAME),
+        transport: resolved.transport,
+        request_redacted,
+        transport_profile: None,
+        image_request_summary: None,
+    })
+}
+
 #[allow(clippy::too_many_arguments)]
 async fn build_gemini_cli_openai_chat_cross_format_payload_parts(
     state: &AppState,
@@ -1923,6 +2105,39 @@ mod tests {
         }
     }
 
+    fn sample_antigravity_transport() -> GatewayProviderTransportSnapshot {
+        let mut transport = sample_gemini_cli_transport();
+        transport.provider.name = "antigravity".to_string();
+        transport.provider.provider_type = "antigravity".to_string();
+        transport.endpoint.base_url = "https://antigravity.googleapis.com".to_string();
+        transport.endpoint.custom_path = None;
+        transport.key.auth_type = "oauth".to_string();
+        transport.key.decrypted_api_key = "__placeholder__".to_string();
+        transport.key.upstream_metadata = None;
+        transport.key.decrypted_auth_config = Some(
+            json!({
+                "provider_type": "antigravity",
+                "project_id": "test-antigravity-project",
+                "client_version": "1.2.3",
+                "session_id": "sess-antigravity-chat",
+                "access_token_import_temporary": true,
+                "headers": {
+                    "Authorization": "Bearer imported-antigravity-token"
+                }
+            })
+            .to_string(),
+        );
+        transport
+    }
+
+    fn sample_antigravity_eligible() -> EligibleLocalExecutionCandidate {
+        let mut eligible = sample_gemini_cli_eligible();
+        eligible.candidate.provider_name = "antigravity".to_string();
+        eligible.candidate.provider_type = "antigravity".to_string();
+        eligible.transport = Arc::new(sample_antigravity_transport());
+        eligible
+    }
+
     #[tokio::test]
     async fn openai_chat_to_gemini_cli_wraps_cross_format_body_in_v1internal_envelope() {
         let state = AppState::new().expect("state should build");
@@ -1989,6 +2204,96 @@ mod tests {
             .is_some());
     }
 
+    #[tokio::test]
+    async fn openai_chat_to_antigravity_wraps_cross_format_body_in_v1internal_envelope() {
+        let state = AppState::new().expect("state should build");
+        let request = http::Request::builder()
+            .method("POST")
+            .uri("/v1/chat/completions")
+            .header(http::header::CONTENT_TYPE, "application/json")
+            .body(())
+            .expect("request should build");
+        let (parts, _) = request.into_parts();
+        let body_json = json!({
+            "model": "gemini-3.5-flash",
+            "messages": [{"role": "user", "content": "hello"}],
+            "stream": true
+        });
+
+        let payload = resolve_local_openai_chat_candidate_payload_parts(
+            &state,
+            &parts,
+            "trace-openai-chat-antigravity",
+            &body_json,
+            &sample_input(),
+            None,
+            &sample_antigravity_eligible(),
+            0,
+            "candidate-0",
+            OPENAI_CHAT_STREAM_PLAN_KIND,
+            "openai_chat_stream_success",
+            true,
+        )
+        .await
+        .expect("candidate resolution should not fail")
+        .expect("antigravity candidate should build a payload");
+
+        assert_eq!(
+            payload.upstream_url,
+            "https://antigravity.googleapis.com/v1internal:streamGenerateContent?alt=sse"
+        );
+        assert_eq!(payload.envelope_name, Some("antigravity:v1internal"));
+        assert_eq!(
+            payload
+                .provider_request_headers
+                .get("authorization")
+                .map(String::as_str),
+            Some("Bearer imported-antigravity-token")
+        );
+        assert_eq!(
+            payload
+                .provider_request_headers
+                .get("x-client-name")
+                .map(String::as_str),
+            Some("antigravity")
+        );
+        assert_eq!(
+            payload
+                .provider_request_headers
+                .get("x-client-version")
+                .map(String::as_str),
+            Some("1.2.3")
+        );
+        assert_eq!(
+            payload
+                .provider_request_headers
+                .get("x-vscode-sessionid")
+                .map(String::as_str),
+            Some("sess-antigravity-chat")
+        );
+        assert_eq!(
+            payload.provider_request_body["project"],
+            "test-antigravity-project"
+        );
+        assert_eq!(
+            payload.provider_request_body["requestId"],
+            "trace-openai-chat-antigravity"
+        );
+        assert_eq!(payload.provider_request_body["model"], "gemini-2.5-pro");
+        assert_eq!(
+            payload.provider_request_body["userAgent"],
+            "antigravity/cli/1.0.16 (aidev_client; os_type=linux; arch=arm64; auth_method=consumer)"
+        );
+        assert_eq!(payload.provider_request_body["requestType"], "agent");
+        assert!(payload.provider_request_body.get("contents").is_none());
+        assert!(payload.provider_request_body["request"]
+            .get("contents")
+            .is_some());
+        assert!(payload.provider_request_body["request"]
+            .get("model")
+            .is_none());
+    }
+
     #[test]
     fn chatgpt_web_chat_image_bridge_body_uses_internal_web_shape() {
         let body_json = json!({
diff --git a/apps/aether-gateway/src/ai_serving/planner/standard/openai/chat/plans.rs b/apps/aether-gateway/src/ai_serving/planner/standard/openai/chat/plans.rs
index 4964b2542..bfdc56c56 100644
--- a/apps/aether-gateway/src/ai_serving/planner/standard/openai/chat/plans.rs
+++ b/apps/aether-gateway/src/ai_serving/planner/standard/openai/chat/plans.rs
@@ -31,11 +31,12 @@ pub(super) fn openai_chat_upstream_is_stream_for_candidate(
         crate::ai_serving::transport::kiro::is_kiro_claude_messages_transport(
             transport,
             provider_api_format,
-        ) || openai_chat_gemini_cli_client_stream_requires_upstream_streaming(
-            transport,
-            provider_api_format,
-            client_is_stream,
-        );
+        ) || openai_chat_antigravity_requires_upstream_streaming(transport, provider_api_format)
+            || openai_chat_gemini_cli_client_stream_requires_upstream_streaming(
+                transport,
+                provider_api_format,
+                client_is_stream,
+            );
     resolve_upstream_is_stream_for_provider(
         transport.endpoint.config.as_ref(),
         transport.provider.provider_type.as_str(),
@@ -45,6 +46,15 @@ pub(super) fn openai_chat_upstream_is_stream_for_candidate(
     )
 }
 
+fn openai_chat_antigravity_requires_upstream_streaming(
+    transport: &GatewayProviderTransportSnapshot,
+    provider_api_format: &str,
+) -> bool {
+    crate::ai_serving::transport::antigravity::is_antigravity_provider_transport(transport)
+        && crate::ai_serving::normalize_api_format_alias(provider_api_format)
+            == "gemini:generate_content"
+}
+
 fn openai_chat_gemini_cli_client_stream_requires_upstream_streaming(
     transport: &GatewayProviderTransportSnapshot,
     provider_api_format: &str,
@@ -201,4 +211,24 @@ mod tests {
             false,
         ));
     }
+
+    #[test]
+    fn openai_chat_policy_resolver_preserves_antigravity_streaming_envelope() {
+        let antigravity = sample_transport(
+            "antigravity",
+            "gemini:generate_content",
+            Some(json!({"upstream_stream_policy": "force_non_stream"})),
+        );
+
+        assert!(openai_chat_upstream_is_stream_for_candidate(
+            &antigravity,
+            "gemini:generate_content",
+            false,
+        ));
+        assert!(openai_chat_upstream_is_stream_for_candidate(
+            &antigravity,
+            "gemini:generate_content",
+            true,
+        ));
+    }
 }
diff --git a/apps/aether-gateway/src/ai_serving/planner/standard/openai/responses/decision/request.rs b/apps/aether-gateway/src/ai_serving/planner/standard/openai/responses/decision/request.rs
index 7c730bfc6..e6edbcf61 100644
--- a/apps/aether-gateway/src/ai_serving/planner/standard/openai/responses/decision/request.rs
+++ b/apps/aether-gateway/src/ai_serving/planner/standard/openai/responses/decision/request.rs
@@ -5,6 +5,10 @@ use aether_contracts::ResolvedTransportProfile;
 use serde_json::{json, Value};
 use tracing::debug;
 
+use crate::ai_serving::planner::antigravity::{
+    build_antigravity_v1internal_provider_request, AntigravityV1InternalRequestError,
+    AntigravityV1InternalRequestInput, ANTIGRAVITY_V1INTERNAL_ENVELOPE_NAME,
+};
 use crate::ai_serving::planner::candidate_preparation::{
     prepare_header_authenticated_candidate, prepare_header_authenticated_candidate_from_auth,
     OauthPreparationContext,
@@ -29,13 +33,7 @@ use crate::ai_serving::planner::standard::{
     build_local_openai_responses_upstream_url, request_body_build_failure_extra_data,
     request_conversion_failure_extra_data,
 };
-use crate::ai_serving::transport::antigravity::{
-    build_antigravity_safe_v1internal_request, build_antigravity_static_identity_headers,
-    classify_local_antigravity_request_support, is_antigravity_provider_transport,
-    AntigravityEnvelopeRequestType, AntigravityRequestAuthUnsupportedReason,
-    AntigravityRequestEnvelopeSupport, AntigravityRequestSideSupport,
-    AntigravityRequestSideUnsupportedReason,
-};
+use crate::ai_serving::transport::antigravity::is_antigravity_provider_transport;
 use crate::ai_serving::transport::auth::{
     resolve_local_gemini_auth, resolve_local_openai_bearer_auth, resolve_local_standard_auth,
 };
@@ -73,8 +71,6 @@ use super::support::{
 };
 use super::LocalOpenAiResponsesSpec;
 
-const ANTIGRAVITY_ENVELOPE_NAME: &str = "antigravity:v1internal";
-
 fn is_grok_text_provider_api_format(provider_api_format: &str) -> bool {
     matches!(
         crate::ai_serving::normalize_api_format_alias(provider_api_format).as_str(),
@@ -120,7 +116,7 @@ pub(crate) async fn resolve_local_openai_responses_candidate_payload_parts(
     let provider_api_format = eligible.provider_api_format.as_str();
     let normalized_provider_api_format =
         crate::ai_serving::normalize_api_format_alias(provider_api_format);
-    let mut transport = Arc::clone(&eligible.transport);
+    let transport = Arc::clone(&eligible.transport);
     let transport_profile = crate::ai_serving::transport::resolve_transport_profile(&transport);
     let is_antigravity = is_antigravity_provider_transport(&transport);
     let is_gemini_cli = is_gemini_cli_provider_transport(&transport);
@@ -415,82 +411,7 @@ pub(crate) async fn resolve_local_openai_responses_candidate_payload_parts(
         provider_api_format,
         Some(body_json),
     );
-    let antigravity_auth = if is_antigravity {
-        let mut antigravity_support = classify_local_antigravity_request_support(
-            &transport,
-            &base_provider_request_body,
-            AntigravityEnvelopeRequestType::Agent,
-        );
-        if matches!(
-            antigravity_support,
-            AntigravityRequestSideSupport::Unsupported(
-                AntigravityRequestSideUnsupportedReason::UnsupportedAuth(
-                    AntigravityRequestAuthUnsupportedReason::MissingProjectId
-                )
-            )
-        ) {
-            if let Some(hydrated) = state
-                .hydrate_antigravity_project_metadata_for_transport(&transport)
-                .await
-            {
-                transport = Arc::new(hydrated);
-                antigravity_support = classify_local_antigravity_request_support(
-                    &transport,
-                    &base_provider_request_body,
-                    AntigravityEnvelopeRequestType::Agent,
-                );
-            }
-        }
-        match antigravity_support {
-            AntigravityRequestSideSupport::Supported(spec) => Some(spec.auth),
-            AntigravityRequestSideSupport::Unsupported(_) => {
-                mark_skipped_local_openai_responses_candidate(
-                    state,
-                    input,
-                    trace_id,
-                    candidate,
-                    candidate_index,
-                    candidate_id,
-                    "transport_unsupported",
-                )
-                .await;
-                return Ok(None);
-            }
-        }
-    } else {
-        None
-    };
-    let provider_request_body = if let Some(antigravity_auth) = antigravity_auth.as_ref() {
-        match build_antigravity_safe_v1internal_request(
-            antigravity_auth,
-            trace_id,
-            &mapped_model,
-            &base_provider_request_body,
-            AntigravityEnvelopeRequestType::Agent,
-        ) {
-            AntigravityRequestEnvelopeSupport::Supported(envelope) => envelope,
-            AntigravityRequestEnvelopeSupport::Unsupported(_) => {
-                mark_skipped_local_openai_responses_candidate_with_failure_diagnostic(
-                    state,
-                    input,
-                    trace_id,
-                    candidate,
-                    candidate_index,
-                    candidate_id,
-                    "provider_request_body_build_failed",
-                    CandidateFailureDiagnostic::envelope_build_failed(
-                        spec_metadata.api_format,
-                        provider_api_format,
-                        "openai_responses_antigravity_envelope",
-                    ),
-                )
-                .await;
-                return Ok(None);
-            }
-        }
-    } else {
-        base_provider_request_body
-    };
+    let provider_request_body = base_provider_request_body;
 
     if let Some(kiro_auth) = kiro_auth.as_ref() {
         return build_kiro_openai_responses_payload_parts(
@@ -562,6 +483,28 @@ pub(crate) async fn resolve_local_openai_responses_candidate_payload_parts(
         )
         .await);
     }
+    if is_antigravity {
+        return Ok(build_antigravity_openai_responses_payload_parts(
+            state,
+            parts,
+            trace_id,
+            body_json,
+            input,
+            eligible,
+            candidate_index,
+            candidate_id,
+            spec_metadata.api_format,
+            &transport,
+            provider_api_format,
+            mapped_model,
+            auth_header,
+            auth_value,
+            provider_request_body,
+            upstream_is_stream,
+            redaction.redacted,
+        )
+        .await);
+    }
 
     let Some(upstream_url) = (if is_grok && is_grok_text_provider_api_format(provider_api_format) {
         Some(build_grok_upstream_url(&transport, GROK_CHAT_PATH))
@@ -598,10 +541,7 @@ pub(crate) async fn resolve_local_openai_responses_candidate_payload_parts(
         .await;
         return Ok(None);
     };
-    let extra_headers = antigravity_auth
-        .as_ref()
-        .map(build_antigravity_static_identity_headers)
-        .unwrap_or_default();
+    let extra_headers = BTreeMap::new();
     let resolved_headers = if is_grok && is_grok_text_provider_api_format(provider_api_format) {
         let Some(headers) = build_grok_browser_headers(GrokHeaderInput {
             transport: &transport,
@@ -728,13 +668,8 @@ pub(crate) async fn resolve_local_openai_responses_candidate_payload_parts(
         upstream_url,
         execution_strategy,
         conversion_mode,
-        is_antigravity: is_antigravity
-            || antigravity_auth.is_some() && ANTIGRAVITY_ENVELOPE_NAME == "antigravity:v1internal",
-        envelope_name: if is_antigravity || antigravity_auth.is_some() {
-            Some(ANTIGRAVITY_ENVELOPE_NAME)
-        } else {
-            None
-        },
+        is_antigravity: false,
+        envelope_name: None,
         upstream_is_stream,
         transport: Arc::clone(&transport),
         transport_profile,
@@ -743,6 +678,160 @@ pub(crate) async fn resolve_local_openai_responses_candidate_payload_parts(
     }))
 }
 
+#[allow(clippy::too_many_arguments)]
+async fn build_antigravity_openai_responses_payload_parts(
+    state: &AppState,
+    parts: &http::request::Parts,
+    trace_id: &str,
+    original_body_json: &serde_json::Value,
+    input: &LocalOpenAiResponsesDecisionInput,
+    eligible: &EligibleLocalExecutionCandidate,
+    candidate_index: u32,
+    candidate_id: &str,
+    client_api_format: &str,
+    transport: &Arc<GatewayProviderTransportSnapshot>,
+    provider_api_format: &str,
+    mapped_model: String,
+    auth_header: String,
+    auth_value: String,
+    gemini_request_body: Value,
+    upstream_is_stream: bool,
+    request_redacted: bool,
+) -> Option<LocalOpenAiResponsesCandidatePayloadParts> {
+    let candidate = &eligible.candidate;
+    let effective_headers = input.effective_headers(&parts.headers);
+    let resolved =
+        match build_antigravity_v1internal_provider_request(AntigravityV1InternalRequestInput {
+            state,
+            parts,
+            transport,
+            trace_id,
+            mapped_model: &mapped_model,
+            provider_api_format,
+            auth_header: &auth_header,
+            auth_value: &auth_value,
+            request_headers: effective_headers,
+            original_request_body: original_body_json,
+            gemini_request_body: &gemini_request_body,
+            upstream_is_stream,
+            same_format: api_format_alias_matches(provider_api_format, client_api_format),
+        })
+        .await
+        {
+            Ok(resolved) => resolved,
+            Err(AntigravityV1InternalRequestError::TransportUnsupported) => {
+                mark_skipped_local_openai_responses_candidate(
+                    state,
+                    input,
+                    trace_id,
+                    candidate,
+                    candidate_index,
+                    candidate_id,
+                    "transport_unsupported",
+                )
+                .await;
+                return None;
+            }
+            Err(AntigravityV1InternalRequestError::EnvelopeUnsupported) => {
+                mark_skipped_local_openai_responses_candidate_with_failure_diagnostic(
+                    state,
+                    input,
+                    trace_id,
+                    candidate,
+                    candidate_index,
+                    candidate_id,
+                    "provider_request_body_build_failed",
+                    CandidateFailureDiagnostic::envelope_build_failed(
+                        client_api_format,
+                        provider_api_format,
+                        "openai_responses_antigravity_envelope",
+                    ),
+                )
+                .await;
+                return None;
+            }
+            Err(AntigravityV1InternalRequestError::UpstreamUrlUnavailable) => {
+                mark_skipped_local_openai_responses_candidate_with_failure_diagnostic(
+                    state,
+                    input,
+                    trace_id,
+                    candidate,
+                    candidate_index,
+                    candidate_id,
+                    "upstream_url_missing",
+                    CandidateFailureDiagnostic::upstream_url_missing(
+                        client_api_format,
+                        provider_api_format,
+                        "openai_responses_antigravity_url",
+                    ),
+                )
+                .await;
+                return None;
+            }
+            Err(AntigravityV1InternalRequestError::HeaderRulesApplyFailed) => {
+                mark_skipped_local_openai_responses_candidate_with_failure_diagnostic(
+                    state,
+                    input,
+                    trace_id,
+                    candidate,
+                    candidate_index,
+                    candidate_id,
+                    "transport_header_rules_apply_failed",
+                    CandidateFailureDiagnostic::header_rules_apply_failed(
+                        client_api_format,
+                        provider_api_format,
+                        "openai_responses_antigravity_headers",
+                    ),
+                )
+                .await;
+                return None;
+            }
+        };
+    let mut provider_request_headers = resolved.headers.headers;
+    apply_codex_openai_responses_special_headers(
+        &mut provider_request_headers,
+        &resolved.body,
+        effective_headers,
+        resolved.transport.provider.provider_type.as_str(),
+        provider_api_format,
+        Some(trace_id),
+        resolved.transport.key.decrypted_auth_config.as_deref(),
+    );
+    apply_local_auth_config_header_overrides(
+        &mut provider_request_headers,
+        resolved.transport.key.decrypted_auth_config.as_deref(),
+    );
+    provider_request_headers.insert("accept".to_string(), "text/event-stream".to_string());
+    request_identity_response_encoding_when_redacted(
+        &mut provider_request_headers,
+        request_redacted,
+    );
+
+    let (execution_strategy, conversion_mode) =
+        ai_local_execution_contract_for_formats(client_api_format, provider_api_format);
+
+    Some(LocalOpenAiResponsesCandidatePayloadParts {
+        auth_header: resolved.headers.auth_header,
+        auth_value: resolved.headers.auth_value,
+        mapped_model,
+        provider_api_format: provider_api_format.to_string(),
+        provider_request_body: resolved.body,
+        provider_request_headers,
+        upstream_url: resolved.upstream_url,
+        execution_strategy,
+        conversion_mode,
+        is_antigravity: true,
+        envelope_name: Some(ANTIGRAVITY_V1INTERNAL_ENVELOPE_NAME),
+        upstream_is_stream,
+        transport: Arc::clone(&resolved.transport),
+        transport_profile: crate::ai_serving::transport::resolve_transport_profile(
+            &resolved.transport,
+        ),
+        image_request_summary: None,
+        request_redacted,
+    })
+}
+
 #[allow(clippy::too_many_arguments)]
 async fn build_gemini_cli_openai_responses_payload_parts(
     state: &AppState,
diff --git a/apps/aether-gateway/src/api/ai/gemini.rs b/apps/aether-gateway/src/api/ai/gemini.rs
index 02037a0aa..4532d3041 100644
--- a/apps/aether-gateway/src/api/ai/gemini.rs
+++ b/apps/aether-gateway/src/api/ai/gemini.rs
@@ -1,6 +1,7 @@
 pub(crate) fn normalized_signature(api_format: &str) -> Option<&'static str> {
     match crate::ai_serving::normalize_api_format_alias(api_format).as_str() {
         "gemini:generate_content" => Some("gemini:generate_content"),
+        "gemini:interactions" => Some("gemini:interactions"),
         "gemini:embedding" => Some("gemini:embedding"),
         "gemini:video" => Some("gemini:video"),
         "gemini:files" => Some("gemini:files"),
@@ -11,6 +12,7 @@ pub(crate) fn normalized_signature(api_format: &str) -> Option<&'static str> {
 pub(crate) fn local_path(api_format: &str) -> Option<&'static str> {
     match crate::ai_serving::normalize_api_format_alias(api_format).as_str() {
         "gemini" | "gemini:generate_content" => Some("/v1beta/models/{model}:{action}"),
+        "gemini:interactions" => Some("/v1/interactions"),
         "gemini:embedding" => Some("/v1beta/models/{model}:{action}"),
         "gemini:video" => Some("/v1beta/models/{model}:predictLongRunning"),
         "gemini:files" => Some("/v1beta/files"),
diff --git a/apps/aether-gateway/src/api/ai/registry.rs b/apps/aether-gateway/src/api/ai/registry.rs
index 119eabc00..5d92375c5 100644
--- a/apps/aether-gateway/src/api/ai/registry.rs
+++ b/apps/aether-gateway/src/api/ai/registry.rs
@@ -17,13 +17,17 @@ const AI_POST_ROUTE_PATTERNS: &[&str] = &[
     "/v1/responses/compact",
     "/v1/images/generations",
     "/v1/images/edits",
+    "/v1/interactions",
+    "/v1beta/interactions",
     "/v1internal:loadCodeAssist",
     "/v1internal:fetchAvailableModels",
+    "/v1internal:retrieveUserQuotaSummary",
     "/v1internal:fetchUserInfo",
     "/v1internal:fetchAdminControls",
     "/v1internal:setUserSettings",
     "/v1internal:listExperiments",
     "/v1internal:recordCodeAssistMetrics",
+    "/v1internal:writeTrajectoryAcls",
     "/v1internal:streamGenerateContent",
 ];
 
@@ -95,6 +99,12 @@ mod tests {
     fn supports_data_api_endpoint_signatures_and_public_paths() {
         for (api_format, family, kind, path) in [
             ("openai:embedding", "openai", "embedding", "/v1/embeddings"),
+            (
+                "gemini:interactions",
+                "gemini",
+                "interactions",
+                "/v1/interactions",
+            ),
             (
                 "gemini:embedding",
                 "gemini",
diff --git a/apps/aether-gateway/src/constants.rs b/apps/aether-gateway/src/constants.rs
index e3b52bcbd..8052f2001 100644
--- a/apps/aether-gateway/src/constants.rs
+++ b/apps/aether-gateway/src/constants.rs
@@ -141,11 +141,13 @@ pub(crate) const RUST_FRONTDOOR_OWNED_ROUTE_PATTERNS: &[&str] = &[
     "/v1beta/files/{path...}",
     "/v1internal:loadCodeAssist",
     "/v1internal:fetchAvailableModels",
+    "/v1internal:retrieveUserQuotaSummary",
     "/v1internal:fetchUserInfo",
     "/v1internal:fetchAdminControls",
     "/v1internal:setUserSettings",
     "/v1internal:listExperiments",
     "/v1internal:recordCodeAssistMetrics",
+    "/v1internal:writeTrajectoryAcls",
     "/v1internal:streamGenerateContent",
     "/",
     "/{*path}",
diff --git a/apps/aether-gateway/src/control/route/ai.rs b/apps/aether-gateway/src/control/route/ai.rs
index bfe95620b..ec8ba8d96 100644
--- a/apps/aether-gateway/src/control/route/ai.rs
+++ b/apps/aether-gateway/src/control/route/ai.rs
@@ -97,6 +97,17 @@ pub(super) fn classify_ai_public_route(
             "openai:video",
             true,
         ))
+    } else if method == http::Method::POST
+        && matches!(normalized_path, "/v1/interactions" | "/v1beta/interactions")
+    {
+        Some(classified_with_request_auth_channel(
+            "ai_public",
+            "gemini",
+            "interactions",
+            "api_key",
+            "gemini:interactions",
+            true,
+        ))
     } else if method == http::Method::POST && is_gemini_models_route(normalized_path) {
         if normalized_path.ends_with(":predictLongRunning") {
             Some(classified(
@@ -182,11 +193,13 @@ fn classify_antigravity_v1internal_route(
     let (route_kind, execution_runtime_candidate) = match action {
         "loadCodeAssist" => ("load_code_assist", false),
         "fetchAvailableModels" => ("fetch_available_models", false),
+        "retrieveUserQuotaSummary" => ("retrieve_user_quota_summary", false),
         "fetchUserInfo" => ("fetch_user_info", false),
         "fetchAdminControls" => ("fetch_admin_controls", false),
         "setUserSettings" => ("set_user_settings", false),
         "listExperiments" => ("list_experiments", false),
         "recordCodeAssistMetrics" => ("record_code_assist_metrics", false),
+        "writeTrajectoryAcls" => ("write_trajectory_acls", false),
         "streamGenerateContent" => ("stream_generate_content", true),
         _ => return None,
     };
diff --git a/apps/aether-gateway/src/control/tests/ai.rs b/apps/aether-gateway/src/control/tests/ai.rs
index 48f781d67..87c0097b5 100644
--- a/apps/aether-gateway/src/control/tests/ai.rs
+++ b/apps/aether-gateway/src/control/tests/ai.rs
@@ -274,6 +274,23 @@ fn classifies_gemini_batch_embed_contents_as_embedding_route() {
     assert!(decision.is_execution_runtime_candidate());
 }
 
+#[test]
+fn classifies_gemini_interactions_as_interactions_route() {
+    let headers = headers(&[("x-goog-api-key", "gemini-key")]);
+    let uri: Uri = "/v1/interactions".parse().expect("uri should parse");
+    let decision =
+        classify_control_route(&http::Method::POST, &uri, &headers).expect("route should classify");
+
+    assert_eq!(decision.route_family.as_deref(), Some("gemini"));
+    assert_eq!(decision.route_kind.as_deref(), Some("interactions"));
+    assert_eq!(decision.request_auth_channel.as_deref(), Some("api_key"));
+    assert_eq!(
+        decision.auth_endpoint_signature.as_deref(),
+        Some("gemini:interactions")
+    );
+    assert!(decision.is_execution_runtime_candidate());
+}
+
 #[test]
 fn classifies_gemini_predict_long_running_as_video_route() {
     let headers = headers(&[]);
@@ -302,6 +319,10 @@ fn classifies_antigravity_v1internal_control_plane_routes() {
     for (path, route_kind) in [
         ("/v1internal:loadCodeAssist", "load_code_assist"),
         ("/v1internal:fetchAvailableModels", "fetch_available_models"),
+        (
+            "/v1internal:retrieveUserQuotaSummary",
+            "retrieve_user_quota_summary",
+        ),
         ("/v1internal:fetchUserInfo", "fetch_user_info"),
         ("/v1internal:fetchAdminControls", "fetch_admin_controls"),
         ("/v1internal:setUserSettings", "set_user_settings"),
@@ -310,6 +331,7 @@ fn classifies_antigravity_v1internal_control_plane_routes() {
             "/v1internal:recordCodeAssistMetrics",
             "record_code_assist_metrics",
         ),
+        ("/v1internal:writeTrajectoryAcls", "write_trajectory_acls"),
     ] {
         let uri: Uri = path.parse().expect("uri should parse");
         let decision = classify_control_route(&http::Method::POST, &uri, &headers)
diff --git a/apps/aether-gateway/src/execution_runtime/fallback.rs b/apps/aether-gateway/src/execution_runtime/fallback.rs
index 9ee333206..a50e6ef30 100644
--- a/apps/aether-gateway/src/execution_runtime/fallback.rs
+++ b/apps/aether-gateway/src/execution_runtime/fallback.rs
@@ -179,6 +179,7 @@ pub(crate) fn resolve_core_sync_error_finalize_report_kind(
         "openai_responses_compact_sync" => "openai_responses_compact_sync_finalize",
         "claude_chat_sync" => "claude_chat_sync_finalize",
         "gemini_chat_sync" => "gemini_chat_sync_finalize",
+        "gemini_interactions_sync" => "gemini_interactions_sync_finalize",
         "claude_cli_sync" => "claude_cli_sync_finalize",
         "gemini_cli_sync" => "gemini_cli_sync_finalize",
         _ => return None,
@@ -324,6 +325,7 @@ pub(crate) fn resolve_core_stream_error_finalize_report_kind(
         "openai_chat_stream" => "openai_chat_sync_finalize",
         "claude_chat_stream" => "claude_chat_sync_finalize",
         "gemini_chat_stream" => "gemini_chat_sync_finalize",
+        "gemini_interactions_stream" => "gemini_interactions_sync_finalize",
         "openai_responses_stream" => "openai_responses_sync_finalize",
         "openai_responses_compact_stream" => "openai_responses_compact_sync_finalize",
         "claude_cli_stream" => "claude_cli_sync_finalize",
@@ -340,6 +342,7 @@ pub(crate) fn resolve_core_stream_direct_finalize_report_kind(plan_kind: &str) -
         "openai_image_stream" => "openai_image_sync_finalize",
         "claude_chat_stream" => "claude_chat_sync_finalize",
         "gemini_chat_stream" => "gemini_chat_sync_finalize",
+        "gemini_interactions_stream" => "gemini_interactions_sync_finalize",
         "openai_responses_stream" => "openai_responses_sync_finalize",
         "openai_responses_compact_stream" => "openai_responses_compact_sync_finalize",
         "claude_cli_stream" => "claude_cli_sync_finalize",
diff --git a/apps/aether-gateway/src/execution_runtime/sync/execution.rs b/apps/aether-gateway/src/execution_runtime/sync/execution.rs
index fbb6f1f48..b37e1e36a 100644
--- a/apps/aether-gateway/src/execution_runtime/sync/execution.rs
+++ b/apps/aether-gateway/src/execution_runtime/sync/execution.rs
@@ -2637,7 +2637,20 @@ async fn execute_execution_runtime_sync_impl(
         candidate_id,
     )?;
     if !usage_payload.report_kind.trim().is_empty() {
-        spawn_sync_report(state.clone(), usage_payload);
+        if status_code >= 400 {
+            let report_kind = usage_payload.report_kind.clone();
+            if let Err(err) = submit_sync_report(state, usage_payload).await {
+                warn!(
+                    event_name = "local_sync_error_report_submit_failed",
+                    log_type = "ops",
+                    trace_id = %trace_id,
+                    report_kind = %report_kind,
+                    "gateway failed to submit local sync error report before returning response: {err:?}"
+                );
+            }
+        } else {
+            spawn_sync_report(state.clone(), usage_payload);
+        }
     }
 
     Ok(Some(response))
diff --git a/apps/aether-gateway/src/execution_runtime/tests.rs b/apps/aether-gateway/src/execution_runtime/tests.rs
index 7334edccd..7a0016cc9 100644
--- a/apps/aether-gateway/src/execution_runtime/tests.rs
+++ b/apps/aether-gateway/src/execution_runtime/tests.rs
@@ -104,6 +104,10 @@ fn resolve_core_error_background_report_kind_maps_all_core_finalize_kinds() {
         ("openai_chat_sync_finalize", Some("openai_chat_sync_error")),
         ("claude_chat_sync_finalize", Some("claude_chat_sync_error")),
         ("gemini_chat_sync_finalize", Some("gemini_chat_sync_error")),
+        (
+            "gemini_interactions_sync_finalize",
+            Some("gemini_interactions_sync_error"),
+        ),
         (
             "openai_responses_sync_finalize",
             Some("openai_responses_sync_error"),
@@ -151,6 +155,10 @@ fn resolve_core_success_background_report_kind_maps_all_core_finalize_kinds() {
             "gemini_chat_sync_finalize",
             Some("gemini_chat_sync_success"),
         ),
+        (
+            "gemini_interactions_sync_finalize",
+            Some("gemini_interactions_sync_success"),
+        ),
         (
             "openai_responses_sync_finalize",
             Some("openai_responses_sync_success"),
diff --git a/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test.rs b/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test.rs
index 19ec95060..d3e7fc89e 100644
--- a/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test.rs
+++ b/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test.rs
@@ -36,8 +36,8 @@ use crate::provider_key_auth::{
 use crate::provider_transport::antigravity::{
     build_antigravity_safe_v1internal_request, build_antigravity_static_identity_headers,
     classify_local_antigravity_request_support, AntigravityEnvelopeRequestType,
-    AntigravityRequestEnvelopeSupport, AntigravityRequestSideSupport,
-    AntigravityRequestSideUnsupportedReason,
+    AntigravityRequestAuthUnsupportedReason, AntigravityRequestEnvelopeSupport,
+    AntigravityRequestSideSupport, AntigravityRequestSideUnsupportedReason,
 };
 use crate::provider_transport::kiro::{
     build_kiro_generate_assistant_response_url, build_kiro_provider_headers,
@@ -2061,7 +2061,7 @@ async fn provider_query_execute_openai_image_test_candidate(
     trace_id: &str,
     requested_model: &str,
 ) -> Result<ProviderQueryExecutionOutcome, GatewayError> {
-    let Some(transport) = state
+    let Some(mut transport) = state
         .read_provider_transport_snapshot(&provider.id, &candidate.endpoint.id, &candidate.key.id)
         .await?
     else {
@@ -2429,7 +2429,7 @@ async fn provider_query_execute_antigravity_test_candidate(
     trace_id: &str,
     requested_model: &str,
 ) -> Result<ProviderQueryExecutionOutcome, GatewayError> {
-    let Some(transport) = state
+    let Some(mut transport) = state
         .read_provider_transport_snapshot(&provider.id, &candidate.endpoint.id, &candidate.key.id)
         .await?
     else {
@@ -2463,11 +2463,34 @@ async fn provider_query_execute_antigravity_test_candidate(
         ));
     };
 
-    let antigravity_spec = match classify_local_antigravity_request_support(
+    let mut antigravity_support = classify_local_antigravity_request_support(
         &transport,
         &base_provider_request_body,
         AntigravityEnvelopeRequestType::EndpointTest,
+    );
+    if matches!(
+        antigravity_support,
+        AntigravityRequestSideSupport::Unsupported(
+            AntigravityRequestSideUnsupportedReason::UnsupportedAuth(
+                AntigravityRequestAuthUnsupportedReason::MissingProjectId
+            )
+        )
     ) {
+        if let Some(hydrated) = state
+            .app()
+            .hydrate_antigravity_project_metadata_for_transport(&transport)
+            .await
+        {
+            transport = hydrated;
+            antigravity_support = classify_local_antigravity_request_support(
+                &transport,
+                &base_provider_request_body,
+                AntigravityEnvelopeRequestType::EndpointTest,
+            );
+        }
+    }
+
+    let antigravity_spec = match antigravity_support {
         AntigravityRequestSideSupport::Supported(spec) => spec,
         AntigravityRequestSideSupport::Unsupported(reason) => {
             let reason = provider_query_antigravity_unsupported_reason(reason);
diff --git a/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/adapter.rs b/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/adapter.rs
index 876ebd1d9..86333dc64 100644
--- a/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/adapter.rs
+++ b/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/adapter.rs
@@ -2,7 +2,8 @@ use super::DEFAULT_PROVIDER_QUERY_TEST_MESSAGE;
 use crate::handlers::admin::request::{AdminAppState, AdminGatewayProviderTransportSnapshot};
 use crate::provider_transport::antigravity::{
     classify_local_antigravity_request_support, AntigravityEnvelopeRequestType,
-    AntigravityRequestSideSupport, AntigravityRequestSideUnsupportedReason,
+    AntigravityRequestAuthUnsupportedReason, AntigravityRequestSideSupport,
+    AntigravityRequestSideUnsupportedReason,
 };
 use crate::provider_transport::kiro::supports_local_kiro_request_transport_with_network;
 use serde_json::{json, Value};
@@ -82,14 +83,14 @@ pub(super) fn provider_query_standard_test_unsupported_reason(
                 api_format,
             )
         }
-        "gemini:generate_content" | "gemini:embedding"
+        "gemini:generate_content" | "gemini:embedding" | "gemini:interactions"
             if crate::provider_transport::is_vertex_transport_context(transport) =>
         {
             aether_provider_transport::vertex::local_vertex_gemini_transport_unsupported_reason_with_network(
                 transport,
             )
         }
-        "gemini:generate_content" | "gemini:embedding" => {
+        "gemini:generate_content" | "gemini:embedding" | "gemini:interactions" => {
             crate::provider_transport::policy::local_gemini_transport_unsupported_reason_with_network(
                 transport,
                 api_format,
@@ -130,9 +131,21 @@ pub(super) fn provider_query_antigravity_unsupported_reason(
         AntigravityRequestSideUnsupportedReason::UnsupportedNetworkConfig => {
             "transport_network_config_unsupported"
         }
-        AntigravityRequestSideUnsupportedReason::UnsupportedAuth(_) => {
-            "transport_antigravity_auth_unsupported"
-        }
+        AntigravityRequestSideUnsupportedReason::UnsupportedAuth(
+            AntigravityRequestAuthUnsupportedReason::WrongProviderType,
+        ) => "transport_provider_type_unsupported",
+        AntigravityRequestSideUnsupportedReason::UnsupportedAuth(
+            AntigravityRequestAuthUnsupportedReason::MissingAuthConfig,
+        ) => "transport_antigravity_auth_config_missing",
+        AntigravityRequestSideUnsupportedReason::UnsupportedAuth(
+            AntigravityRequestAuthUnsupportedReason::InvalidAuthConfigJson,
+        ) => "transport_antigravity_auth_config_invalid",
+        AntigravityRequestSideUnsupportedReason::UnsupportedAuth(
+            AntigravityRequestAuthUnsupportedReason::ComplexDynamicAuthConfig,
+        ) => "transport_antigravity_auth_config_unsupported",
+        AntigravityRequestSideUnsupportedReason::UnsupportedAuth(
+            AntigravityRequestAuthUnsupportedReason::MissingProjectId,
+        ) => "transport_antigravity_project_id_missing",
         AntigravityRequestSideUnsupportedReason::UnsupportedEnvelope(_) => {
             "transport_antigravity_envelope_unsupported"
         }
@@ -250,6 +263,7 @@ pub(super) fn provider_query_test_adapter_for_provider_api_format(
             | "openai:responses:compact"
             | "claude:messages"
             | "gemini:generate_content"
+            | "gemini:interactions"
             | "openai:embedding"
             | "gemini:embedding"
             | "jina:embedding"
@@ -366,7 +380,7 @@ pub(super) fn provider_query_transport_supports_model_test_execution(
                 transport, api_format,
             )
         }
-        "gemini:generate_content" | "gemini:embedding" => {
+        "gemini:generate_content" | "gemini:embedding" | "gemini:interactions" => {
             if crate::provider_transport::is_vertex_transport_context(transport) {
                 aether_provider_transport::vertex::supports_local_vertex_gemini_transport_with_network(transport)
             } else {
diff --git a/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/summary.rs b/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/summary.rs
index 881ec8879..72618af5c 100644
--- a/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/summary.rs
+++ b/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/summary.rs
@@ -120,6 +120,10 @@ fn provider_query_endpoint_route_payload(
             ("Gemini API", "gemini_native", "generateContent", "")
         }
         "gemini:generate_content" => ("Gemini native", "gemini_native", "generateContent", ""),
+        "gemini:interactions" if is_gemini_api => {
+            ("Gemini API", "gemini_native", "interactions", "")
+        }
+        "gemini:interactions" => ("Gemini native", "gemini_native", "interactions", ""),
         "openai:embedding" if is_vertex && is_openai_compat => (
             "Vertex AI OpenAI-compatible",
             "openai_compatible",
diff --git a/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/tests.rs b/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/tests.rs
index 867fb69cc..4ea4bac28 100644
--- a/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/tests.rs
+++ b/apps/aether-gateway/src/handlers/admin/provider/query/models/model_test/tests.rs
@@ -678,6 +678,10 @@ fn provider_query_test_adapter_routes_fixed_provider_endpoint_types() {
         provider_query_test_adapter_for_provider_api_format("custom", "gemini:embedding"),
         Some(ProviderQueryTestAdapter::Standard)
     );
+    assert_eq!(
+        provider_query_test_adapter_for_provider_api_format("custom", "gemini:interactions"),
+        Some(ProviderQueryTestAdapter::Standard)
+    );
     assert_eq!(
         provider_query_test_adapter_for_provider_api_format(
             "aliyun",
diff --git a/apps/aether-gateway/src/handlers/public/ai_public.rs b/apps/aether-gateway/src/handlers/public/ai_public.rs
index dcc84a5c0..23a0e1aa4 100644
--- a/apps/aether-gateway/src/handlers/public/ai_public.rs
+++ b/apps/aether-gateway/src/handlers/public/ai_public.rs
@@ -926,6 +926,9 @@ fn maybe_build_local_antigravity_v1internal_response(
         "fetch_available_models" => {
             Some(Json(build_antigravity_fetch_available_models_payload()).into_response())
         }
+        "retrieve_user_quota_summary" => {
+            Some(Json(build_antigravity_retrieve_user_quota_summary_payload()).into_response())
+        }
         "fetch_user_info" => {
             Some(Json(build_antigravity_fetch_user_info_payload()).into_response())
         }
@@ -938,6 +941,7 @@ fn maybe_build_local_antigravity_v1internal_response(
             .into_response(),
         ),
         "record_code_assist_metrics" => Some(Json(json!({})).into_response()),
+        "write_trajectory_acls" => Some(Json(json!({})).into_response()),
         "set_user_settings" => Some(build_antigravity_set_user_settings_response(request_body)),
         "stream_generate_content" => None,
         _ => None,
@@ -1042,27 +1046,42 @@ fn build_antigravity_fetch_user_info_payload() -> Value {
     })
 }
 
+fn build_antigravity_retrieve_user_quota_summary_payload() -> Value {
+    json!({
+        "description": "",
+        "groups": []
+    })
+}
+
 fn build_antigravity_default_user_settings_payload() -> Value {
     json!({
-        "preferredModelId": "gemini-3.1-flash-lite"
+        "preferredModelId": "gemini-3.5-flash-low"
     })
 }
 
 fn build_antigravity_fetch_available_models_payload() -> Value {
     json!({
         "models": {
-            "gemini-3.5-flash-low": antigravity_model_payload("gemini-3.5-flash-low", "Gemini 3.5 Flash Low"),
-            "gemini-3-flash-agent": antigravity_model_payload("gemini-3-flash-agent", "Gemini 3 Flash Agent"),
+            "gemini-pro-agent": antigravity_model_payload("gemini-pro-agent", "Gemini 3.1 Pro (High)"),
+            "gemini-3.1-pro-low": antigravity_model_payload("gemini-3.1-pro-low", "Gemini 3.1 Pro (Low)"),
+            "gemini-3-flash-agent": antigravity_model_payload("gemini-3-flash-agent", "Gemini 3.5 Flash (High)"),
+            "gemini-3.5-flash-low": antigravity_model_payload("gemini-3.5-flash-low", "Gemini 3.5 Flash (Medium)"),
+            "gemini-3.5-flash-extra-low": antigravity_model_payload("gemini-3.5-flash-extra-low", "Gemini 3.5 Flash (Low)"),
+            "claude-opus-4-6-thinking": antigravity_model_payload("claude-opus-4-6-thinking", "Claude Opus 4.6 (Thinking)"),
+            "claude-sonnet-4-6": antigravity_model_payload("claude-sonnet-4-6", "Claude Sonnet 4.6 (Thinking)"),
+            "gpt-oss-120b-medium": antigravity_model_payload("gpt-oss-120b-medium", "GPT-OSS 120B (Medium)"),
             "gemini-3.1-flash-lite": antigravity_model_payload("gemini-3.1-flash-lite", "Gemini 3.1 Flash Lite"),
-            "gemini-3.1-pro-low": antigravity_model_payload("gemini-3.1-pro-low", "Gemini 3.1 Pro Low"),
             "gemini-3-flash": antigravity_model_payload("gemini-3-flash", "Gemini 3 Flash"),
-            "gemini-2.5-flash": antigravity_model_payload("gemini-2.5-flash", "Gemini 2.5 Flash"),
-            "gemini-2.5-flash-lite": antigravity_model_payload("gemini-2.5-flash-lite", "Gemini 2.5 Flash Lite"),
-            "gemini-2.5-flash-thinking": antigravity_model_payload("gemini-2.5-flash-thinking", "Gemini 2.5 Flash Thinking"),
+            "gemini-2.5-flash": antigravity_model_payload("gemini-2.5-flash", "Gemini 3.1 Flash Lite"),
+            "gemini-2.5-flash-lite": antigravity_model_payload("gemini-2.5-flash-lite", "Gemini 3.1 Flash Lite"),
+            "gemini-2.5-flash-thinking": antigravity_model_payload("gemini-2.5-flash-thinking", "Gemini 3.1 Flash Lite"),
             "gemini-2.5-pro": antigravity_model_payload("gemini-2.5-pro", "Gemini 2.5 Pro"),
             "gemini-3.1-flash-image": antigravity_model_payload("gemini-3.1-flash-image", "Gemini 3.1 Flash Image"),
-            "tab_flash_lite_preview": antigravity_model_payload("tab_flash_lite_preview", "Tab Flash Lite Preview"),
-            "tab_jump_flash_lite_preview": antigravity_model_payload("tab_jump_flash_lite_preview", "Tab Jump Flash Lite Preview"),
+            "gemini-3.1-pro-high": antigravity_model_payload("gemini-3.1-pro-high", "Gemini 3.1 Pro (High)"),
+            "chat_20706": antigravity_model_payload("chat_20706", ""),
+            "chat_23310": antigravity_model_payload("chat_23310", ""),
+            "tab_flash_lite_preview": antigravity_model_payload("tab_flash_lite_preview", ""),
+            "tab_jump_flash_lite_preview": antigravity_model_payload("tab_jump_flash_lite_preview", ""),
             "models/proactive-observer": antigravity_model_payload("models/proactive-observer", "Proactive Observer")
         },
         "agentModelSorts": [
@@ -1071,10 +1090,14 @@ fn build_antigravity_fetch_available_models_payload() -> Value {
                 "groups": [
                     {
                         "modelIds": [
-                            "gemini-3.1-flash-lite",
+                            "gemini-3.5-flash-low",
                             "gemini-3-flash-agent",
+                            "gemini-3.5-flash-extra-low",
                             "gemini-3.1-pro-low",
-                            "gemini-3.5-flash-low"
+                            "gemini-pro-agent",
+                            "claude-sonnet-4-6",
+                            "claude-opus-4-6-thinking",
+                            "gpt-oss-120b-medium"
                         ]
                     }
                 ]
@@ -1083,12 +1106,18 @@ fn build_antigravity_fetch_available_models_payload() -> Value {
         "audioTranscriptionModelIds": ["models/proactive-observer"],
         "commandModelIds": ["gemini-3-flash"],
         "commitMessageModelIds": ["gemini-3.1-flash-lite"],
-        "defaultAgentModelId": "gemini-3.1-flash-lite",
-        "deprecatedModelIds": {},
+        "defaultAgentModelId": "gemini-3.5-flash-low",
+        "deprecatedModelIds": {
+            "gemini-3.1-pro-high": {
+                "newModelEnum": "MODEL_PLACEHOLDER_M16",
+                "newModelId": "gemini-pro-agent",
+                "oldModelEnum": "MODEL_PLACEHOLDER_M37"
+            }
+        },
         "experimentIds": [],
         "imageGenerationModelIds": ["gemini-3.1-flash-image"],
         "mqueryModelIds": ["gemini-3.1-flash-lite"],
-        "tabModelIds": ["tab_flash_lite_preview", "tab_jump_flash_lite_preview"],
+        "tabModelIds": ["chat_20706", "chat_23310"],
         "tieredModelIds": {
             "flash": ["gemini-3-flash-agent"],
             "flashLite": ["gemini-3.1-flash-lite"],
@@ -1100,6 +1129,11 @@ fn build_antigravity_fetch_available_models_payload() -> Value {
 
 fn antigravity_model_payload(id: &str, display_name: &str) -> Value {
     let model = match id {
+        "chat_20706" => "MODEL_CHAT_20706",
+        "chat_23310" => "MODEL_CHAT_23310",
+        "claude-opus-4-6-thinking" => "MODEL_PLACEHOLDER_M26",
+        "claude-sonnet-4-6" => "MODEL_PLACEHOLDER_M35",
+        "gpt-oss-120b-medium" => "MODEL_OPENAI_GPT_OSS_120B_MEDIUM",
         "gemini-2.5-flash" => "MODEL_GOOGLE_GEMINI_2_5_FLASH",
         "gemini-2.5-flash-lite" => "MODEL_GOOGLE_GEMINI_2_5_FLASH_LITE",
         "gemini-2.5-flash-thinking" => "MODEL_GOOGLE_GEMINI_2_5_FLASH_THINKING",
@@ -1108,22 +1142,43 @@ fn antigravity_model_payload(id: &str, display_name: &str) -> Value {
         "gemini-3-flash-agent" => "MODEL_PLACEHOLDER_M132",
         "gemini-3.1-flash-image" => "MODEL_PLACEHOLDER_M21",
         "gemini-3.1-flash-lite" => "MODEL_PLACEHOLDER_M50",
+        "gemini-pro-agent" => "MODEL_PLACEHOLDER_M16",
+        "gemini-3.1-pro-high" => "MODEL_PLACEHOLDER_M37",
         "gemini-3.1-pro-low" => "MODEL_PLACEHOLDER_M36",
         "gemini-3.5-flash-low" => "MODEL_PLACEHOLDER_M20",
+        "gemini-3.5-flash-extra-low" => "MODEL_PLACEHOLDER_M187",
         "models/proactive-observer" => "MODEL_PLACEHOLDER_M70",
         "tab_flash_lite_preview" => "MODEL_PLACEHOLDER_M19",
         "tab_jump_flash_lite_preview" => "MODEL_PLACEHOLDER_M28",
         _ => "MODEL_PLACEHOLDER_M20",
     };
-    json!({
-        "apiProvider": "API_PROVIDER_GOOGLE_GEMINI",
+    let (api_provider, model_provider) = match id {
+        "claude-opus-4-6-thinking" | "claude-sonnet-4-6" => {
+            ("API_PROVIDER_ANTHROPIC_VERTEX", "MODEL_PROVIDER_ANTHROPIC")
+        }
+        "gpt-oss-120b-medium" => ("API_PROVIDER_OPENAI_VERTEX", "MODEL_PROVIDER_OPENAI"),
+        "chat_20706" | "chat_23310" => ("API_PROVIDER_INTERNAL", "MODEL_PROVIDER_GOOGLE"),
+        _ => ("API_PROVIDER_GOOGLE_GEMINI", "MODEL_PROVIDER_GOOGLE"),
+    };
+    let mut payload = json!({
+        "apiProvider": api_provider,
         "displayName": display_name,
         "maxOutputTokens": 65536,
         "maxTokens": 1048576,
         "minThinkingBudget": 32,
         "model": model,
-        "modelProvider": "MODEL_PROVIDER_GOOGLE",
-        "recommended": id == "gemini-3.1-flash-lite",
+        "modelProvider": model_provider,
+        "recommended": matches!(
+            id,
+            "gemini-3.5-flash-low"
+                | "gemini-3-flash-agent"
+                | "gemini-3.5-flash-extra-low"
+                | "gemini-3.1-pro-low"
+                | "gemini-pro-agent"
+                | "claude-sonnet-4-6"
+                | "claude-opus-4-6-thinking"
+                | "gpt-oss-120b-medium"
+        ),
         "supportedMimeTypes": {
             "application/json": true,
             "application/pdf": true,
@@ -1137,7 +1192,88 @@ fn antigravity_model_payload(id: &str, display_name: &str) -> Value {
         "supportsVideo": true,
         "thinkingBudget": 4000,
         "tokenizerType": "LLAMA_WITH_SPECIAL"
-    })
+    });
+    if let Some(object) = payload.as_object_mut() {
+        match id {
+            "gemini-3-flash-agent" => {
+                object.insert("thinkingBudget".to_string(), json!(10000));
+            }
+            "gemini-pro-agent" => {
+                object.insert("maxOutputTokens".to_string(), json!(65535));
+                object.insert("thinkingBudget".to_string(), json!(10001));
+            }
+            "gemini-3.1-pro-high" => {
+                object.insert("maxOutputTokens".to_string(), json!(65535));
+                object.insert("minThinkingBudget".to_string(), json!(128));
+                object.insert("thinkingBudget".to_string(), json!(10001));
+            }
+            "gemini-3.5-flash-extra-low" => {
+                object.insert("thinkingBudget".to_string(), json!(1000));
+                object.insert("maxOutputTokens".to_string(), json!(65536));
+            }
+            "gemini-3.1-pro-low" => {
+                object.insert("maxOutputTokens".to_string(), json!(65535));
+                object.insert("minThinkingBudget".to_string(), json!(128));
+                object.insert("thinkingBudget".to_string(), json!(1001));
+            }
+            "claude-sonnet-4-6" | "claude-opus-4-6-thinking" => {
+                object.insert("maxTokens".to_string(), json!(250000));
+                object.insert("maxOutputTokens".to_string(), json!(64000));
+                object.insert("thinkingBudget".to_string(), json!(1024));
+                object.remove("minThinkingBudget");
+                object.remove("supportsVideo");
+            }
+            "gpt-oss-120b-medium" => {
+                object.insert("maxTokens".to_string(), json!(131072));
+                object.insert("maxOutputTokens".to_string(), json!(32768));
+                object.insert("thinkingBudget".to_string(), json!(8192));
+                object.remove("minThinkingBudget");
+                object.remove("supportsImages");
+                object.remove("supportsVideo");
+            }
+            "chat_20706" => {
+                object.insert("maxTokens".to_string(), json!(16384));
+                object.remove("displayName");
+                object.remove("maxOutputTokens");
+                object.remove("minThinkingBudget");
+                object.remove("recommended");
+                object.remove("supportsImages");
+                object.remove("supportsThinking");
+                object.remove("supportsVideo");
+                object.remove("thinkingBudget");
+                object.remove("tokenizerType");
+                object.remove("supportedMimeTypes");
+            }
+            "chat_23310" => {
+                object.insert("maxTokens".to_string(), json!(32768));
+                object.remove("displayName");
+                object.remove("maxOutputTokens");
+                object.remove("minThinkingBudget");
+                object.remove("recommended");
+                object.remove("supportsImages");
+                object.remove("supportsThinking");
+                object.remove("supportsVideo");
+                object.remove("thinkingBudget");
+                object.remove("tokenizerType");
+                object.remove("supportedMimeTypes");
+            }
+            "tab_flash_lite_preview" | "tab_jump_flash_lite_preview" => {
+                object.insert("maxTokens".to_string(), json!(16384));
+                object.insert("maxOutputTokens".to_string(), json!(4096));
+                object.remove("displayName");
+                object.remove("minThinkingBudget");
+                object.remove("recommended");
+                object.remove("supportsImages");
+                object.remove("supportsThinking");
+                object.remove("supportsVideo");
+                object.remove("thinkingBudget");
+                object.remove("tokenizerType");
+                object.remove("supportedMimeTypes");
+            }
+            _ => {}
+        }
+    }
+    payload
 }
 
 async fn maybe_build_local_gemini_video_operations_response(
diff --git a/apps/aether-gateway/src/handlers/public/support/test_connection/route.rs b/apps/aether-gateway/src/handlers/public/support/test_connection/route.rs
index 8bc142ffd..0e68bff02 100644
--- a/apps/aether-gateway/src/handlers/public/support/test_connection/route.rs
+++ b/apps/aether-gateway/src/handlers/public/support/test_connection/route.rs
@@ -102,7 +102,7 @@ pub(super) async fn maybe_build_local_test_connection_route_response(
     let format_value = crate::ai_serving::normalize_api_format_alias(&format_value);
     if !matches!(
         format_value.as_str(),
-        "openai:chat" | "claude:messages" | "gemini:generate_content"
+        "openai:chat" | "claude:messages" | "gemini:generate_content" | "gemini:interactions"
     ) {
         return None;
     }
@@ -186,6 +186,10 @@ pub(super) async fn maybe_build_local_test_connection_route_response(
                 "parts": [{"text": "Health check"}],
             }],
         }),
+        "gemini:interactions" => json!({
+            "model": model,
+            "input": "Health check",
+        }),
         _ => return None,
     };
     if !crate::provider_transport::apply_local_body_rules(
@@ -197,7 +201,7 @@ pub(super) async fn maybe_build_local_test_connection_route_response(
     }
 
     let oauth_auth = match format_value.as_str() {
-        "openai:chat" | "claude:messages" | "gemini:generate_content" => {
+        "openai:chat" | "claude:messages" | "gemini:generate_content" | "gemini:interactions" => {
             match state.resolve_local_oauth_request_auth(&transport).await {
                 Ok(Some(crate::provider_transport::LocalResolvedOAuthRequestAuth::Header {
                     name,
@@ -218,7 +222,7 @@ pub(super) async fn maybe_build_local_test_connection_route_response(
             crate::provider_transport::auth::resolve_local_standard_auth(&transport)
                 .or(oauth_auth.clone())
         }
-        "gemini:generate_content" => {
+        "gemini:generate_content" | "gemini:interactions" => {
             crate::provider_transport::auth::resolve_local_gemini_auth(&transport)
                 .or(oauth_auth.clone())
         }
diff --git a/apps/aether-gateway/src/handlers/shared/catalog.rs b/apps/aether-gateway/src/handlers/shared/catalog.rs
index 50ac1ba6d..8c9197090 100644
--- a/apps/aether-gateway/src/handlers/shared/catalog.rs
+++ b/apps/aether-gateway/src/handlers/shared/catalog.rs
@@ -577,6 +577,44 @@ fn model_quota_window_snapshot(
     Some(Value::Object(window))
 }
 
+fn canonical_antigravity_model_label(model_name: &str) -> Option<&'static str> {
+    match model_name.trim() {
+        "claude-opus-4-6-thinking" => Some("Claude Opus 4.6 (Thinking)"),
+        "claude-sonnet-4-6" | "claude-sonnet-4-6-thinking" => Some("Claude Sonnet 4.6 (Thinking)"),
+        "gemini-3-flash-agent" => Some("Gemini 3.5 Flash (High)"),
+        "gemini-3.5-flash-low" => Some("Gemini 3.5 Flash (Medium)"),
+        "gemini-3.5-flash-extra-low" => Some("Gemini 3.5 Flash (Low)"),
+        "gemini-3.1-pro-high" | "gemini-pro-agent" => Some("Gemini 3.1 Pro (High)"),
+        "gemini-3.1-pro-low" => Some("Gemini 3.1 Pro (Low)"),
+        "gemini-3.1-flash-image" => Some("Gemini 3.1 Flash Image"),
+        "gemini-3.1-flash-lite" => Some("Gemini 3.1 Flash Lite"),
+        "gemini-3-flash" => Some("Gemini 3 Flash"),
+        "gemini-2.5-pro" => Some("Gemini 2.5 Pro"),
+        "gemini-2.5-flash-thinking" | "gemini-2.5-flash" | "gemini-2.5-flash-lite" => {
+            Some("Gemini 3.1 Flash Lite")
+        }
+        "gpt-oss-120b-medium" => Some("GPT-OSS 120B (Medium)"),
+        "tab_flash_lite_preview" => Some("Tab Flash Lite Preview"),
+        "tab_jump_flash_lite_preview" => Some("Tab Jump Flash Lite Preview"),
+        "models/proactive-observer" => Some("Proactive Observer"),
+        _ => None,
+    }
+}
+
+fn antigravity_model_quota_window_snapshot(
+    model_name: &str,
+    item: &Map<String, Value>,
+    observed_at_unix_secs: Option<u64>,
+) -> Option<Value> {
+    let mut window = model_quota_window_snapshot(model_name, item, observed_at_unix_secs)?;
+    if let Some(label) = canonical_antigravity_model_label(model_name) {
+        if let Some(window) = window.as_object_mut() {
+            window.insert("label".to_string(), json!(label));
+        }
+    }
+    Some(window)
+}
+
 fn provider_quota_metadata_string(
     metadata: &Map<String, Value>,
     fields: &[&str],
@@ -1466,7 +1504,7 @@ fn build_antigravity_quota_status_snapshot(
             models
                 .iter()
                 .filter_map(|(model_name, item)| {
-                    model_quota_window_snapshot(
+                    antigravity_model_quota_window_snapshot(
                         model_name,
                         item.as_object()?,
                         observed_at_unix_secs,
@@ -3715,6 +3753,77 @@ mod tests {
         );
     }
 
+    #[test]
+    fn sync_provider_key_quota_status_snapshot_labels_antigravity_models_by_model_id() {
+        let upstream_metadata = json!({
+            "antigravity": {
+                "updated_at": 1_775_553_285u64,
+                "quota_by_model": {
+                    "gemini-3.5-flash-extra-low": {
+                        "display_name": "Gemini 3.5 Flash (Low)",
+                        "remaining_fraction": 1.0
+                    },
+                    "gemini-3.5-flash-low": {
+                        "display_name": "Gemini 3.5 Flash (Medium)",
+                        "remaining_fraction": 0.75
+                    },
+                    "gemini-3-flash-agent": {
+                        "display_name": "Gemini 3.5 Flash (High)",
+                        "remaining_fraction": 0.5
+                    },
+                    "gemini-2.5-flash": {
+                        "display_name": "Gemini 3.1 Flash Lite",
+                        "remaining_fraction": 0.4
+                    },
+                    "claude-sonnet-4-6": {
+                        "display_name": "Claude Sonnet 4.6 (Thinking)",
+                        "remaining_fraction": 0.3
+                    }
+                }
+            }
+        });
+
+        let payload = sync_provider_key_quota_status_snapshot(
+            None,
+            "antigravity",
+            Some(&upstream_metadata),
+            "refresh_api",
+        )
+        .expect("quota snapshot should sync");
+        let windows = payload["quota"]["windows"]
+            .as_array()
+            .expect("quota windows should exist");
+        let label_for_model = |model: &str| {
+            windows
+                .iter()
+                .filter_map(Value::as_object)
+                .find(|window| window.get("model") == Some(&json!(model)))
+                .and_then(|window| window.get("label"))
+                .cloned()
+        };
+
+        assert_eq!(
+            label_for_model("gemini-3.5-flash-extra-low"),
+            Some(json!("Gemini 3.5 Flash (Low)"))
+        );
+        assert_eq!(
+            label_for_model("gemini-3.5-flash-low"),
+            Some(json!("Gemini 3.5 Flash (Medium)"))
+        );
+        assert_eq!(
+            label_for_model("gemini-3-flash-agent"),
+            Some(json!("Gemini 3.5 Flash (High)"))
+        );
+        assert_eq!(
+            label_for_model("gemini-2.5-flash"),
+            Some(json!("Gemini 3.1 Flash Lite"))
+        );
+        assert_eq!(
+            label_for_model("claude-sonnet-4-6"),
+            Some(json!("Claude Sonnet 4.6 (Thinking)"))
+        );
+    }
+
     #[test]
     fn provider_key_status_snapshot_payload_backfills_account_block_from_oauth_invalid_reason() {
         let mut key = sample_catalog_key();
diff --git a/apps/aether-gateway/src/tests/ai_execute/finalize_local.rs b/apps/aether-gateway/src/tests/ai_execute/finalize_local.rs
index 65732211b..7a787497c 100644
--- a/apps/aether-gateway/src/tests/ai_execute/finalize_local.rs
+++ b/apps/aether-gateway/src/tests/ai_execute/finalize_local.rs
@@ -1469,15 +1469,36 @@ async fn gateway_executes_openai_chat_cross_format_tool_use_upstream_stream_via_
 }
 
 #[test]
-fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_transport_unsupported() {
+fn gateway_executes_openai_chat_antigravity_cross_format_sync_via_local_finalize_response() {
     run_openai_chat_finalize_test(
-        "gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_transport_unsupported",
-        gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_transport_unsupported_impl,
+        "gateway_executes_openai_chat_antigravity_cross_format_sync_via_local_finalize_response",
+        gateway_executes_openai_chat_antigravity_cross_format_sync_via_local_finalize_response_impl,
     );
 }
 
-async fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_transport_unsupported_impl(
+async fn gateway_executes_openai_chat_antigravity_cross_format_sync_via_local_finalize_response_impl(
 ) {
+    use base64::Engine as _;
+
+    #[derive(Debug, Clone)]
+    struct SeenExecutionRuntimeSyncRequest {
+        trace_id: String,
+        url: String,
+        accept: String,
+        authorization: String,
+        x_client_name: String,
+        x_client_version: String,
+        x_vscode_sessionid: String,
+        x_goog_api_client: String,
+        project: String,
+        request_id: String,
+        model: String,
+        user_agent: String,
+        request_type: String,
+        contents_len: usize,
+        request_has_model: bool,
+    }
+
     fn hash_api_key(value: &str) -> String {
         let mut hasher = Sha256::new();
         hasher.update(value.as_bytes());
@@ -1582,11 +1603,11 @@ async fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_tr
         )
         .expect("endpoint should build")
         .with_transport_fields(
-            "https://generativelanguage.googleapis.com".to_string(),
+            "https://antigravity.googleapis.com".to_string(),
             None,
             None,
             Some(2),
-            Some("/v1beta/models/claude-sonnet-4-5:generateContent".to_string()),
+            None,
             None,
             None,
             None,
@@ -1595,6 +1616,11 @@ async fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_tr
     }
 
     fn sample_provider_catalog_key() -> StoredProviderCatalogKey {
+        let encrypted_auth_config = encrypt_python_fernet_plaintext(
+            DEVELOPMENT_ENCRYPTION_KEY,
+            r#"{"provider_type":"antigravity","project_id":"project-antigravity-chat-local-1","client_version":"1.2.3","session_id":"sess-antigravity-chat-local-123","access_token_import_temporary":true,"headers":{"Authorization":"Bearer imported-antigravity-chat-token"}}"#,
+        )
+        .expect("auth config should encrypt");
         StoredProviderCatalogKey::new(
             "key-openai-chat-antigravity-finalize-local-1".to_string(),
             "provider-openai-chat-antigravity-finalize-local-1".to_string(),
@@ -1606,12 +1632,9 @@ async fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_tr
         .expect("key should build")
         .with_transport_fields(
             Some(serde_json::json!(["gemini:generate_content"])),
-            encrypt_python_fernet_plaintext(
-                DEVELOPMENT_ENCRYPTION_KEY,
-                "sk-upstream-openai-chat-antigravity-finalize",
-            )
-            .expect("api key should encrypt"),
-            None,
+            encrypt_python_fernet_plaintext(DEVELOPMENT_ENCRYPTION_KEY, "__placeholder__")
+                .expect("api key should encrypt"),
+            Some(encrypted_auth_config),
             None,
             Some(serde_json::json!({"gemini:generate_content": 1})),
             None,
@@ -1632,6 +1655,8 @@ async fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_tr
     let plan_hits_clone = Arc::clone(&plan_hits);
     let public_hits = Arc::new(Mutex::new(0usize));
     let public_hits_clone = Arc::clone(&public_hits);
+    let seen_execution_runtime = Arc::new(Mutex::new(None::<SeenExecutionRuntimeSyncRequest>));
+    let seen_execution_runtime_clone = Arc::clone(&seen_execution_runtime);
     let request_candidate_repository = Arc::new(InMemoryRequestCandidateRepository::default());
     let usage_repository = Arc::new(InMemoryUsageReadRepository::default());
 
@@ -1692,42 +1717,130 @@ async fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_tr
 
     let execution_runtime = Router::new().route(
         "/v1/execute/sync",
-        any(|_request: Request| async move {
-            Json(json!({
-                "request_id": "trace-openai-chat-antigravity-sync-123",
-                "status_code": 200,
-                "headers": {
-                    "content-type": "application/json"
-                },
-                "body": {
-                    "json_body": {
-                        "response": {
-                            "responseId": "resp-antigravity-chat-sync-123",
-                            "candidates": [{
-                                "content": {
-                                    "parts": [
-                                        {"text": "Need a tool."},
-                                        {"functionCall": {"name": "get_weather", "args": {"city": "SF"}}}
-                                    ],
-                                    "role": "model"
-                                },
-                                "finishReason": "STOP",
-                                "index": 0
-                            }],
-                            "modelVersion": "claude-sonnet-4-5",
-                            "usageMetadata": {
-                                "promptTokenCount": 2,
-                                "candidatesTokenCount": 3,
-                                "totalTokenCount": 5
-                            }
-                        },
-                        "responseId": "resp-antigravity-chat-sync-123"
+        any(move |request: Request| {
+            let seen_execution_runtime_inner = Arc::clone(&seen_execution_runtime_clone);
+            async move {
+                let (parts, body) = request.into_parts();
+                let raw_body = to_bytes(body, usize::MAX).await.expect("body should read");
+                let payload: serde_json::Value =
+                    serde_json::from_slice(&raw_body).expect("execution runtime payload should parse");
+                *seen_execution_runtime_inner.lock().expect("mutex should lock") =
+                    Some(SeenExecutionRuntimeSyncRequest {
+                        trace_id: parts
+                            .headers
+                            .get(TRACE_ID_HEADER)
+                            .and_then(|value| value.to_str().ok())
+                            .unwrap_or_default()
+                            .to_string(),
+                        url: payload
+                            .get("url")
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        accept: payload
+                            .get("headers")
+                            .and_then(|value| value.get("accept"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        authorization: payload
+                            .get("headers")
+                            .and_then(|value| value.get("authorization"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        x_client_name: payload
+                            .get("headers")
+                            .and_then(|value| value.get("x-client-name"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        x_client_version: payload
+                            .get("headers")
+                            .and_then(|value| value.get("x-client-version"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        x_vscode_sessionid: payload
+                            .get("headers")
+                            .and_then(|value| value.get("x-vscode-sessionid"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        x_goog_api_client: payload
+                            .get("headers")
+                            .and_then(|value| value.get("x-goog-api-client"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        project: payload
+                            .get("body")
+                            .and_then(|value| value.get("json_body"))
+                            .and_then(|value| value.get("project"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        request_id: payload
+                            .get("body")
+                            .and_then(|value| value.get("json_body"))
+                            .and_then(|value| value.get("requestId"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        model: payload
+                            .get("body")
+                            .and_then(|value| value.get("json_body"))
+                            .and_then(|value| value.get("model"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        user_agent: payload
+                            .get("body")
+                            .and_then(|value| value.get("json_body"))
+                            .and_then(|value| value.get("userAgent"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        request_type: payload
+                            .get("body")
+                            .and_then(|value| value.get("json_body"))
+                            .and_then(|value| value.get("requestType"))
+                            .and_then(|value| value.as_str())
+                            .unwrap_or_default()
+                            .to_string(),
+                        contents_len: payload
+                            .get("body")
+                            .and_then(|value| value.get("json_body"))
+                            .and_then(|value| value.get("request"))
+                            .and_then(|value| value.get("contents"))
+                            .and_then(|value| value.as_array())
+                            .map(Vec::len)
+                            .unwrap_or_default(),
+                        request_has_model: payload
+                            .get("body")
+                            .and_then(|value| value.get("json_body"))
+                            .and_then(|value| value.get("request"))
+                            .and_then(|value| value.get("model"))
+                            .is_some(),
+                    });
+                Json(json!({
+                    "request_id": "trace-openai-chat-antigravity-sync-123",
+                    "status_code": 200,
+                    "headers": {
+                        "content-type": "text/event-stream"
+                    },
+                    "body": {
+                        "body_bytes_b64": base64::engine::general_purpose::STANDARD.encode(
+                            concat!(
+                                "data: {\"response\":{\"candidates\":[{\"content\":{\"parts\":[{\"text\":\"Hello Antigravity Chat\"}],\"role\":\"model\"},\"finishReason\":\"STOP\",\"index\":0}],\"modelVersion\":\"claude-sonnet-4-5\",\"usageMetadata\":{\"promptTokenCount\":2,\"candidatesTokenCount\":3,\"totalTokenCount\":5}},\"responseId\":\"resp-antigravity-chat-sync-123\"}\n\n"
+                            )
+                        )
+                    },
+                    "telemetry": {
+                        "elapsed_ms": 29
                     }
-                },
-                "telemetry": {
-                    "elapsed_ms": 29
-                }
-            }))
+                }))
+            }
         }),
     );
 
@@ -1779,31 +1892,84 @@ async fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_tr
         .await
         .expect("request should succeed");
     let elapsed = started_at.elapsed();
-
     let response_status = response.status();
-    let execution_path = response
-        .headers()
-        .get(EXECUTION_PATH_HEADER)
-        .and_then(|value| value.to_str().ok())
-        .unwrap_or_default()
-        .to_string();
-    let miss_reason = response
-        .headers()
-        .get(LOCAL_EXECUTION_RUNTIME_MISS_REASON_HEADER)
-        .and_then(|value| value.to_str().ok())
-        .unwrap_or_default()
-        .to_string();
     let response_body = response.text().await.expect("body should read");
+
+    assert_eq!(response_status, StatusCode::OK);
+    let response_json: serde_json::Value =
+        serde_json::from_str(&response_body).expect("body should parse");
     assert_eq!(
-        response_status,
-        StatusCode::SERVICE_UNAVAILABLE,
-        "unexpected gateway response: path={execution_path} miss={miss_reason} body={response_body}"
+        response_json,
+        json!({
+            "id": "resp-local-stream",
+            "object": "chat.completion",
+            "model": "claude-sonnet-4-5",
+            "choices": [{
+                "index": 0,
+                "message": {
+                    "role": "assistant",
+                    "content": "Hello Antigravity Chat"
+                },
+                "finish_reason": "stop"
+            }],
+            "usage": {
+                "prompt_tokens": 2,
+                "completion_tokens": 3,
+                "total_tokens": 5
+            }
+        })
+    );
+    assert!(
+        elapsed < std::time::Duration::from_millis(3_500),
+        "response took unexpectedly long for local finalize path: elapsed={elapsed:?} finalize_hits={} report_hits={}",
+        *finalize_hits.lock().expect("mutex should lock"),
+        *report_hits.lock().expect("mutex should lock"),
+    );
+
+    let seen_execution_runtime_request = seen_execution_runtime
+        .lock()
+        .expect("mutex should lock")
+        .clone()
+        .expect("execution runtime request should be captured");
+    assert_eq!(
+        seen_execution_runtime_request.trace_id,
+        "trace-openai-chat-antigravity-sync-123"
     );
     assert_eq!(
-        execution_path, "local_execution_runtime_miss",
-        "unexpected execution path: miss={miss_reason} body={response_body}"
+        seen_execution_runtime_request.url,
+        "https://antigravity.googleapis.com/v1internal:streamGenerateContent?alt=sse"
     );
-    assert_eq!(miss_reason, "all_candidates_skipped");
+    assert_eq!(seen_execution_runtime_request.accept, "text/event-stream");
+    assert_eq!(
+        seen_execution_runtime_request.authorization,
+        "Bearer imported-antigravity-chat-token"
+    );
+    assert_eq!(seen_execution_runtime_request.x_client_name, "antigravity");
+    assert_eq!(seen_execution_runtime_request.x_client_version, "1.2.3");
+    assert_eq!(
+        seen_execution_runtime_request.x_vscode_sessionid,
+        "sess-antigravity-chat-local-123"
+    );
+    assert_eq!(
+        seen_execution_runtime_request.x_goog_api_client,
+        "gl-node/18.18.2 fire/0.8.6 grpc/1.10.x"
+    );
+    assert_eq!(
+        seen_execution_runtime_request.project,
+        "project-antigravity-chat-local-1"
+    );
+    assert_eq!(
+        seen_execution_runtime_request.request_id,
+        "trace-openai-chat-antigravity-sync-123"
+    );
+    assert_eq!(seen_execution_runtime_request.model, "claude-sonnet-4-5");
+    assert_eq!(
+        seen_execution_runtime_request.user_agent,
+        aether_provider_transport::antigravity::ANTIGRAVITY_REQUEST_USER_AGENT
+    );
+    assert_eq!(seen_execution_runtime_request.request_type, "agent");
+    assert_eq!(seen_execution_runtime_request.contents_len, 1);
+    assert!(!seen_execution_runtime_request.request_has_model);
 
     let mut stored_candidates = Vec::new();
     for _ in 0..50 {
@@ -1819,11 +1985,8 @@ async fn gateway_skips_openai_chat_antigravity_cross_format_sync_candidate_as_tr
         tokio::time::sleep(std::time::Duration::from_millis(10)).await;
     }
     assert_eq!(stored_candidates.len(), 1);
-    assert_eq!(stored_candidates[0].status, RequestCandidateStatus::Skipped);
-    assert_eq!(
-        stored_candidates[0].skip_reason.as_deref(),
-        Some("transport_provider_type_unsupported")
-    );
+    assert_eq!(stored_candidates[0].status, RequestCandidateStatus::Success);
+    assert_eq!(stored_candidates[0].skip_reason.as_deref(), None);
     tokio::time::sleep(std::time::Duration::from_millis(100)).await;
     assert_eq!(*report_hits.lock().expect("mutex should lock"), 0);
     assert_eq!(*finalize_hits.lock().expect("mutex should lock"), 0);
diff --git a/apps/aether-gateway/src/tests/ai_execute/finalize_local_cli/cross_format.rs b/apps/aether-gateway/src/tests/ai_execute/finalize_local_cli/cross_format.rs
index 0575683b3..af570cfbd 100644
--- a/apps/aether-gateway/src/tests/ai_execute/finalize_local_cli/cross_format.rs
+++ b/apps/aether-gateway/src/tests/ai_execute/finalize_local_cli/cross_format.rs
@@ -1520,7 +1520,10 @@ async fn gateway_executes_openai_responses_antigravity_cross_format_upstream_str
         seen_remote_execution_runtime_request.url,
         "https://antigravity.googleapis.com/v1internal:streamGenerateContent?alt=sse"
     );
-    assert_eq!(seen_remote_execution_runtime_request.accept, "*/*");
+    assert_eq!(
+        seen_remote_execution_runtime_request.accept,
+        "text/event-stream"
+    );
     assert_eq!(
         seen_remote_execution_runtime_request.authorization,
         "Bearer refreshed-antigravity-cli-access-token"
@@ -1555,7 +1558,7 @@ async fn gateway_executes_openai_responses_antigravity_cross_format_upstream_str
     );
     assert_eq!(
         seen_remote_execution_runtime_request.user_agent,
-        "antigravity"
+        aether_provider_transport::antigravity::ANTIGRAVITY_REQUEST_USER_AGENT
     );
     assert_eq!(seen_remote_execution_runtime_request.request_type, "agent");
     assert_eq!(seen_remote_execution_runtime_request.contents_len, 1);
diff --git a/apps/aether-gateway/src/tests/ai_execute/finalize_local_provider/gemini.rs b/apps/aether-gateway/src/tests/ai_execute/finalize_local_provider/gemini.rs
index 800c4bdeb..0a2c2ed67 100644
--- a/apps/aether-gateway/src/tests/ai_execute/finalize_local_provider/gemini.rs
+++ b/apps/aether-gateway/src/tests/ai_execute/finalize_local_provider/gemini.rs
@@ -2143,7 +2143,7 @@ async fn gateway_executes_antigravity_gemini_cli_sync_upstream_stream_via_local_
     );
     assert_eq!(
         seen_remote_execution_runtime_request.user_agent,
-        "antigravity"
+        aether_provider_transport::antigravity::ANTIGRAVITY_REQUEST_USER_AGENT
     );
     assert_eq!(seen_remote_execution_runtime_request.request_type, "agent");
     assert_eq!(seen_remote_execution_runtime_request.contents_len, 0);
diff --git a/apps/aether-gateway/src/tests/ai_execute/stream_provider_gemini/local_cli.rs b/apps/aether-gateway/src/tests/ai_execute/stream_provider_gemini/local_cli.rs
index 08ee4bb63..5e2b73e5e 100644
--- a/apps/aether-gateway/src/tests/ai_execute/stream_provider_gemini/local_cli.rs
+++ b/apps/aether-gateway/src/tests/ai_execute/stream_provider_gemini/local_cli.rs
@@ -2031,7 +2031,10 @@ async fn gateway_executes_antigravity_gemini_cli_stream_via_local_decision_gate_
         "trace-antigravity-cli-oauth-local-stream-123"
     );
     assert_eq!(seen_execution_runtime_request.model, "claude-sonnet-4-5");
-    assert_eq!(seen_execution_runtime_request.user_agent, "antigravity");
+    assert_eq!(
+        seen_execution_runtime_request.user_agent,
+        aether_provider_transport::antigravity::ANTIGRAVITY_REQUEST_USER_AGENT
+    );
     assert_eq!(seen_execution_runtime_request.request_type, "agent");
     assert_eq!(seen_execution_runtime_request.contents_len, 0);
     assert!((seen_execution_runtime_request.exact_temperature - 0.2).abs() < f64::EPSILON);
diff --git a/apps/aether-gateway/src/tests/ai_execute/sync/gemini/cli.rs b/apps/aether-gateway/src/tests/ai_execute/sync/gemini/cli.rs
index cab39f386..90034fe5c 100644
--- a/apps/aether-gateway/src/tests/ai_execute/sync/gemini/cli.rs
+++ b/apps/aether-gateway/src/tests/ai_execute/sync/gemini/cli.rs
@@ -2334,7 +2334,10 @@ async fn gateway_executes_antigravity_gemini_cli_sync_via_local_decision_gate_af
         "trace-antigravity-cli-oauth-local-sync-123"
     );
     assert_eq!(seen_execution_runtime_request.model, "claude-sonnet-4-5");
-    assert_eq!(seen_execution_runtime_request.user_agent, "antigravity");
+    assert_eq!(
+        seen_execution_runtime_request.user_agent,
+        aether_provider_transport::antigravity::ANTIGRAVITY_REQUEST_USER_AGENT
+    );
     assert_eq!(seen_execution_runtime_request.request_type, "agent");
     assert_eq!(seen_execution_runtime_request.contents_len, 0);
     assert!((seen_execution_runtime_request.exact_temperature - 0.2).abs() < f64::EPSILON);
diff --git a/apps/aether-gateway/src/tests/control/admin/endpoints/quota.rs b/apps/aether-gateway/src/tests/control/admin/endpoints/quota.rs
index 2a96bea04..eb70f7c8c 100644
--- a/apps/aether-gateway/src/tests/control/admin/endpoints/quota.rs
+++ b/apps/aether-gateway/src/tests/control/admin/endpoints/quota.rs
@@ -23,6 +23,30 @@ use crate::constants::{
 };
 use crate::data::GatewayDataState;
 
+const PROVIDER_QUOTA_TEST_STACK_BYTES: usize = 16 * 1024 * 1024;
+
+fn run_provider_quota_test<F, Fut>(test_name: &'static str, make_future: F)
+where
+    F: FnOnce() -> Fut + Send + 'static,
+    Fut: std::future::Future<Output = ()> + 'static,
+{
+    let handle = std::thread::Builder::new()
+        .name(test_name.to_string())
+        .stack_size(PROVIDER_QUOTA_TEST_STACK_BYTES)
+        .spawn(move || {
+            let runtime = tokio::runtime::Builder::new_current_thread()
+                .enable_all()
+                .build()
+                .expect("test runtime should build");
+            runtime.block_on(make_future());
+        })
+        .expect("provider quota test thread should spawn");
+
+    if let Err(payload) = handle.join() {
+        std::panic::resume_unwind(payload);
+    }
+}
+
 #[tokio::test]
 async fn gateway_refreshes_admin_provider_quota_locally_for_codex_with_trusted_admin_principal() {
     #[derive(Debug, Clone)]
@@ -1748,8 +1772,15 @@ async fn gateway_reports_codex_quota_runtime_failures_locally_without_falling_ba
     upstream_handle.abort();
 }
 
-#[tokio::test]
-async fn gateway_refreshes_admin_provider_quota_locally_for_antigravity_with_trusted_admin_principal(
+#[test]
+fn gateway_refreshes_admin_provider_quota_locally_for_antigravity_with_trusted_admin_principal() {
+    run_provider_quota_test(
+        "gateway_refreshes_admin_provider_quota_locally_for_antigravity_with_trusted_admin_principal",
+        gateway_refreshes_admin_provider_quota_locally_for_antigravity_with_trusted_admin_principal_inner,
+    );
+}
+
+async fn gateway_refreshes_admin_provider_quota_locally_for_antigravity_with_trusted_admin_principal_inner(
 ) {
     #[derive(Debug, Clone)]
     struct SeenExecutionRuntimeRequest {
diff --git a/apps/aether-gateway/src/tests/control/admin/provider_query.rs b/apps/aether-gateway/src/tests/control/admin/provider_query.rs
index 42c88cca8..0085f12a4 100644
--- a/apps/aether-gateway/src/tests/control/admin/provider_query.rs
+++ b/apps/aether-gateway/src/tests/control/admin/provider_query.rs
@@ -4125,7 +4125,7 @@ async fn gateway_reports_transport_unsupported_reason_for_non_kiro_provider_impl
     assert_eq!(
         payload["error"],
         json!(
-            "Rust local provider-query model test cannot execute endpoint format gemini:generate_content (transport_antigravity_auth_unsupported)"
+            "Rust local provider-query model test cannot execute endpoint format gemini:generate_content (transport_antigravity_auth_config_missing)"
         )
     );
 
@@ -4305,6 +4305,204 @@ async fn gateway_handles_antigravity_endpoint_test_model_locally_impl() {
     execution_runtime_handle.abort();
 }
 
+#[test]
+fn gateway_hydrates_antigravity_project_id_from_load_code_assist_for_test_model() {
+    run_provider_query_test(
+        "gateway_hydrates_antigravity_project_id_from_load_code_assist_for_test_model",
+        gateway_hydrates_antigravity_project_id_from_load_code_assist_for_test_model_impl,
+    );
+}
+
+async fn gateway_hydrates_antigravity_project_id_from_load_code_assist_for_test_model_impl() {
+    let seen_urls = Arc::new(Mutex::new(Vec::<String>::new()));
+    let seen_urls_clone = Arc::clone(&seen_urls);
+    let execution_runtime = Router::new().route(
+        "/v1/execute/sync",
+        any(move |Json(plan): Json<ExecutionPlan>| {
+            let seen_urls_inner = Arc::clone(&seen_urls_clone);
+            async move {
+                seen_urls_inner
+                    .lock()
+                    .expect("mutex should lock")
+                    .push(plan.url.clone());
+                if plan.url == "https://daily-cloudcode-pa.googleapis.com/v1internal:loadCodeAssist"
+                {
+                    assert_eq!(plan.model_name.as_deref(), Some("loadCodeAssist"));
+                    assert_eq!(
+                        plan.headers.get("authorization").map(String::as_str),
+                        Some("Bearer cached-antigravity-token")
+                    );
+                    assert_eq!(
+                        plan.body.json_body.as_ref().and_then(|body| body
+                            .get("metadata")
+                            .and_then(|metadata| metadata.get("pluginType"))),
+                        Some(&json!("GEMINI"))
+                    );
+                    return Json(json!({
+                        "request_id": plan.request_id,
+                        "candidate_id": plan.candidate_id,
+                        "status_code": 200,
+                        "headers": {
+                            "content-type": "application/json"
+                        },
+                        "body": {
+                            "json_body": {
+                                "cloudaicompanionProject": {
+                                    "id": "project-from-antigravity-load-code-assist"
+                                },
+                                "currentTier": {
+                                    "id": "free"
+                                }
+                            }
+                        }
+                    }));
+                }
+
+                assert_eq!(
+                    plan.url,
+                    "https://daily-cloudcode-pa.googleapis.com/v1internal:generateContent"
+                );
+                assert_eq!(plan.provider_id, "provider-antigravity");
+                assert_eq!(plan.endpoint_id, "endpoint-antigravity-gemini");
+                assert_eq!(plan.key_id, "key-antigravity-gemini");
+                assert_eq!(plan.provider_api_format, "gemini:generate_content");
+                assert!(!plan.stream);
+                assert_eq!(
+                    plan.body.json_body.as_ref().unwrap()["project"],
+                    json!("project-from-antigravity-load-code-assist")
+                );
+                assert_eq!(
+                    plan.body.json_body.as_ref().unwrap()["requestType"],
+                    json!("endpoint_test")
+                );
+                assert_eq!(
+                    plan.body.json_body.as_ref().unwrap()["model"],
+                    json!("gemini-3.1-flash-lite")
+                );
+                Json(json!({
+                    "request_id": plan.request_id,
+                    "candidate_id": plan.candidate_id,
+                    "status_code": 200,
+                    "headers": {
+                        "content-type": "application/json"
+                    },
+                    "body": {
+                        "json_body": {
+                            "response": {
+                                "candidates": [{
+                                    "content": {
+                                        "parts": [
+                                            {"text": "Hello from hydrated Antigravity"}
+                                        ],
+                                        "role": "model"
+                                    },
+                                    "finishReason": "STOP",
+                                    "index": 0
+                                }],
+                                "modelVersion": "gemini-3.1-flash-lite",
+                                "usageMetadata": {
+                                    "promptTokenCount": 2,
+                                    "candidatesTokenCount": 4,
+                                    "totalTokenCount": 6
+                                }
+                            },
+                            "responseId": "resp-antigravity-hydrated-test-123"
+                        }
+                    },
+                    "telemetry": {
+                        "elapsed_ms": 23
+                    }
+                }))
+            }
+        }),
+    );
+
+    let (execution_runtime_url, execution_runtime_handle) = start_server(execution_runtime).await;
+    let mut provider = sample_provider("provider-antigravity", "Antigravity", 10);
+    provider.provider_type = "antigravity".to_string();
+    let mut key = sample_key(
+        "key-antigravity-gemini",
+        "provider-antigravity",
+        "gemini:generate_content",
+        "cached-antigravity-token",
+    );
+    key.auth_type = "oauth".to_string();
+    key.encrypted_auth_config = Some(
+        aether_crypto::encrypt_python_fernet_plaintext(
+            DEVELOPMENT_ENCRYPTION_KEY,
+            r#"{"provider_type":"antigravity","refresh_token":"rt-antigravity-123"}"#,
+        )
+        .expect("auth config should encrypt"),
+    );
+    let provider_catalog_repository = Arc::new(InMemoryProviderCatalogReadRepository::seed(
+        vec![provider],
+        vec![sample_endpoint(
+            "endpoint-antigravity-gemini",
+            "provider-antigravity",
+            "gemini:generate_content",
+            "https://daily-cloudcode-pa.googleapis.com",
+        )],
+        vec![key],
+    ));
+
+    let gateway = build_router_with_state(
+        build_state_with_execution_runtime_override(execution_runtime_url)
+            .with_data_state_for_tests(
+                GatewayDataState::with_provider_catalog_repository_for_tests(Arc::clone(
+                    &provider_catalog_repository,
+                ))
+                .with_encryption_key_for_tests(DEVELOPMENT_ENCRYPTION_KEY),
+            ),
+    );
+    let (gateway_url, gateway_handle) = start_server(gateway).await;
+
+    let response = reqwest::Client::new()
+        .post(format!("{gateway_url}/api/admin/provider-query/test-model"))
+        .header(GATEWAY_HEADER, "rust-phase3b")
+        .header(TRUSTED_ADMIN_USER_ID_HEADER, "admin-user-123")
+        .header(TRUSTED_ADMIN_USER_ROLE_HEADER, "admin")
+        .header(TRUSTED_ADMIN_SESSION_ID_HEADER, "session-123")
+        .json(&json!({
+            "provider_id": "provider-antigravity",
+            "model": "gemini-3.1-flash-lite",
+            "api_format": "gemini:generate_content",
+            "message": "Say hello"
+        }))
+        .send()
+        .await
+        .expect("request should succeed");
+
+    assert_eq!(response.status(), StatusCode::OK);
+    let payload: serde_json::Value = response.json().await.expect("json body should parse");
+    assert_eq!(payload["success"], json!(true));
+    assert_eq!(
+        payload["data"]["response"]["choices"][0]["message"]["content"],
+        json!("Hello from hydrated Antigravity")
+    );
+    assert_eq!(
+        *seen_urls.lock().expect("mutex should lock"),
+        vec![
+            "https://daily-cloudcode-pa.googleapis.com/v1internal:loadCodeAssist".to_string(),
+            "https://daily-cloudcode-pa.googleapis.com/v1internal:generateContent".to_string(),
+        ]
+    );
+    let reloaded = provider_catalog_repository
+        .list_keys_by_ids(&["key-antigravity-gemini".to_string()])
+        .await
+        .expect("key should reload");
+    assert_eq!(
+        reloaded[0]
+            .upstream_metadata
+            .as_ref()
+            .and_then(|metadata| metadata.get("antigravity"))
+            .and_then(|metadata| metadata.get("project_id")),
+        Some(&json!("project-from-antigravity-load-code-assist"))
+    );
+
+    gateway_handle.abort();
+    execution_runtime_handle.abort();
+}
+
 #[test]
 fn gateway_prefers_supported_non_kiro_endpoint_when_api_format_is_omitted() {
     run_provider_query_test(
diff --git a/apps/aether-gateway/src/tests/control/admin/system.rs b/apps/aether-gateway/src/tests/control/admin/system.rs
index 557dcee59..a5eb90068 100644
--- a/apps/aether-gateway/src/tests/control/admin/system.rs
+++ b/apps/aether-gateway/src/tests/control/admin/system.rs
@@ -1452,6 +1452,11 @@ async fn gateway_handles_admin_system_api_formats_locally_with_trusted_admin_pri
     assert!(formats.iter().any(|item| item["value"] == "jina:embedding"));
     assert!(formats.iter().any(|item| item["value"] == "jina:rerank"));
     assert!(formats.iter().any(|item| item["value"] == "gemini:video"));
+    let gemini_interactions = formats
+        .iter()
+        .find(|item| item["value"] == "gemini:interactions")
+        .expect("gemini interactions format should exist");
+    assert_eq!(gemini_interactions["default_path"], "/v1/interactions");
     let aliyun_embedding = formats
         .iter()
         .find(|item| item["value"] == "aliyun:multimodal_embedding")
diff --git a/apps/aether-gateway/src/tests/frontdoor/ai.rs b/apps/aether-gateway/src/tests/frontdoor/ai.rs
index 20c881d07..542727bf4 100644
--- a/apps/aether-gateway/src/tests/frontdoor/ai.rs
+++ b/apps/aether-gateway/src/tests/frontdoor/ai.rs
@@ -949,6 +949,10 @@ async fn gateway_handles_antigravity_v1internal_control_plane_without_proxying()
             "/v1internal:fetchAvailableModels",
             json!({"project": "aether-antigravity-local"}),
         ),
+        (
+            "/v1internal:retrieveUserQuotaSummary",
+            json!({"project": "aether-antigravity-local"}),
+        ),
         (
             "/v1internal:fetchUserInfo",
             json!({"project": "aether-antigravity-local"}),
@@ -966,6 +970,10 @@ async fn gateway_handles_antigravity_v1internal_control_plane_without_proxying()
                 "metrics": []
             }),
         ),
+        (
+            "/v1internal:writeTrajectoryAcls",
+            json!({"trajectoryId": "trajectory-ant-123"}),
+        ),
         (
             "/v1internal:setUserSettings",
             json!({"userSettings": user_settings.clone()}),
@@ -1012,14 +1020,58 @@ async fn gateway_handles_antigravity_v1internal_control_plane_without_proxying()
                 );
             }
             "/v1internal:fetchAvailableModels" => {
-                assert_eq!(payload["defaultAgentModelId"], "gemini-3.1-flash-lite");
+                assert_eq!(payload["defaultAgentModelId"], "gemini-3.5-flash-low");
                 assert_eq!(
                     payload["tieredModelIds"]["flash"],
                     json!(["gemini-3-flash-agent"])
                 );
+                assert_eq!(
+                    payload["tieredModelIds"]["pro"],
+                    json!(["gemini-3.1-pro-low"])
+                );
+                assert_eq!(
+                    payload["models"]["gemini-3-flash-agent"]["displayName"],
+                    "Gemini 3.5 Flash (High)"
+                );
                 assert_eq!(
                     payload["models"]["gemini-3.5-flash-low"]["displayName"],
-                    "Gemini 3.5 Flash Low"
+                    "Gemini 3.5 Flash (Medium)"
+                );
+                assert_eq!(
+                    payload["models"]["gemini-3.5-flash-extra-low"]["displayName"],
+                    "Gemini 3.5 Flash (Low)"
+                );
+                assert_eq!(
+                    payload["models"]["gemini-pro-agent"]["displayName"],
+                    "Gemini 3.1 Pro (High)"
+                );
+                assert_eq!(
+                    payload["models"]["claude-opus-4-6-thinking"]["displayName"],
+                    "Claude Opus 4.6 (Thinking)"
+                );
+                assert_eq!(
+                    payload["models"]["gpt-oss-120b-medium"]["displayName"],
+                    "GPT-OSS 120B (Medium)"
+                );
+                assert_eq!(
+                    payload["models"]["gemini-pro-agent"]["model"],
+                    "MODEL_PLACEHOLDER_M16"
+                );
+                assert_eq!(
+                    payload["models"]["gemini-3.1-pro-high"]["model"],
+                    "MODEL_PLACEHOLDER_M37"
+                );
+                assert_eq!(
+                    payload["models"]["gemini-3.5-flash-extra-low"]["model"],
+                    "MODEL_PLACEHOLDER_M187"
+                );
+                assert_eq!(
+                    payload["models"]["claude-sonnet-4-6"]["apiProvider"],
+                    "API_PROVIDER_ANTHROPIC_VERTEX"
+                );
+                assert_eq!(
+                    payload["models"]["gpt-oss-120b-medium"]["apiProvider"],
+                    "API_PROVIDER_OPENAI_VERTEX"
                 );
                 assert_eq!(
                     payload["models"]["gemini-3.5-flash-low"]["apiProvider"],
@@ -1032,18 +1084,26 @@ async fn gateway_handles_antigravity_v1internal_control_plane_without_proxying()
                 assert_eq!(
                     payload["agentModelSorts"][0]["groups"][0]["modelIds"],
                     json!([
-                        "gemini-3.1-flash-lite",
+                        "gemini-3.5-flash-low",
                         "gemini-3-flash-agent",
+                        "gemini-3.5-flash-extra-low",
                         "gemini-3.1-pro-low",
-                        "gemini-3.5-flash-low"
+                        "gemini-pro-agent",
+                        "claude-sonnet-4-6",
+                        "claude-opus-4-6-thinking",
+                        "gpt-oss-120b-medium"
                     ])
                 );
-                assert_eq!(payload["deprecatedModelIds"], json!({}));
+                assert_eq!(
+                    payload["deprecatedModelIds"]["gemini-3.1-pro-high"]["newModelId"],
+                    "gemini-pro-agent"
+                );
                 assert_eq!(payload["commandModelIds"], json!(["gemini-3-flash"]));
                 assert_eq!(
                     payload["imageGenerationModelIds"],
                     json!(["gemini-3.1-flash-image"])
                 );
+                assert_eq!(payload["tabModelIds"], json!(["chat_20706", "chat_23310"]));
                 assert_eq!(payload["mqueryModelIds"], json!(["gemini-3.1-flash-lite"]));
                 assert_eq!(
                     payload["webSearchModelIds"],
@@ -1058,9 +1118,13 @@ async fn gateway_handles_antigravity_v1internal_control_plane_without_proxying()
                 assert_eq!(payload["regionCode"], "US");
                 assert_eq!(
                     payload["userSettings"]["preferredModelId"],
-                    "gemini-3.1-flash-lite"
+                    "gemini-3.5-flash-low"
                 );
             }
+            "/v1internal:retrieveUserQuotaSummary" => {
+                assert_eq!(payload["description"], "");
+                assert_eq!(payload["groups"], json!([]));
+            }
             "/v1internal:fetchAdminControls" => {
                 assert_eq!(payload, json!({}));
             }
@@ -1071,6 +1135,9 @@ async fn gateway_handles_antigravity_v1internal_control_plane_without_proxying()
             "/v1internal:recordCodeAssistMetrics" => {
                 assert_eq!(payload, json!({}));
             }
+            "/v1internal:writeTrajectoryAcls" => {
+                assert_eq!(payload, json!({}));
+            }
             "/v1internal:setUserSettings" => {
                 assert_eq!(payload["userSettings"], user_settings);
             }
diff --git a/crates/aether-admin/src/provider/quota.rs b/crates/aether-admin/src/provider/quota.rs
index c7b19c80c..58112994d 100644
--- a/crates/aether-admin/src/provider/quota.rs
+++ b/crates/aether-admin/src/provider/quota.rs
@@ -223,13 +223,19 @@ pub fn parse_antigravity_usage_response(
 ) -> Option<serde_json::Value> {
     let models = value.get("models")?.as_object()?;
     let mut quota_by_model = serde_json::Map::new();
+    let mut opaque_key_display_index = 1usize;
 
     for (model_id, model_value) in models {
         let mut payload = serde_json::Map::new();
-        if let Some(display_name) = coerce_json_string(
+        let upstream_display_name = coerce_json_string(
             model_value
                 .get("displayName")
                 .or_else(|| model_value.get("display_name")),
+        );
+        if let Some(display_name) = friendly_quota_display_name(
+            upstream_display_name,
+            model_id,
+            &mut opaque_key_display_index,
         ) {
             payload.insert("display_name".to_string(), json!(display_name));
         }
@@ -270,6 +276,7 @@ pub fn parse_gemini_cli_retrieve_user_quota_response(
 ) -> Option<serde_json::Value> {
     let buckets = value.get("buckets")?.as_array()?;
     let mut quota_by_model = serde_json::Map::new();
+    let mut opaque_key_display_index = 1usize;
 
     for bucket in buckets {
         if !bucket.is_object() {
@@ -320,6 +327,12 @@ pub fn parse_gemini_cli_retrieve_user_quota_response(
         .or_else(|| model_id.clone())
         .or_else(|| token_type.clone())
         .unwrap_or_else(|| quota_key.clone());
+        let display_name = friendly_quota_display_name(
+            Some(display_name),
+            &quota_key,
+            &mut opaque_key_display_index,
+        )
+        .unwrap_or_else(|| quota_key.clone());
         let remaining_fraction = first_json_f64_by_paths(
             bucket,
             &[
@@ -456,6 +469,38 @@ pub fn parse_gemini_cli_retrieve_user_quota_response(
     }))
 }
 
+fn is_opaque_reset_credit_quota_identifier(value: &str) -> bool {
+    value.trim().starts_with("RateLimitResetCredit_")
+}
+
+fn friendly_quota_display_name(
+    candidate: Option<String>,
+    quota_key: &str,
+    opaque_key_display_index: &mut usize,
+) -> Option<String> {
+    let candidate = candidate
+        .map(|value| value.trim().to_string())
+        .filter(|value| !value.is_empty());
+
+    if let Some(candidate) = candidate.as_deref() {
+        if !is_opaque_reset_credit_quota_identifier(candidate) {
+            return Some(candidate.to_string());
+        }
+    }
+
+    if is_opaque_reset_credit_quota_identifier(quota_key)
+        || candidate
+            .as_deref()
+            .is_some_and(is_opaque_reset_credit_quota_identifier)
+    {
+        let label = format!("Key-{}", *opaque_key_display_index);
+        *opaque_key_display_index += 1;
+        return Some(label);
+    }
+
+    candidate
+}
+
 pub fn parse_gemini_cli_v1internal_credits_response(
     value: &serde_json::Value,
     updated_at_unix_secs: u64,
@@ -1999,9 +2044,10 @@ pub fn parse_chatgpt_web_conversation_init_response(
 mod tests {
     use super::{
         codex_build_invalid_state, codex_runtime_invalid_reason,
-        normalize_codex_reset_credit_consume_outcome, parse_chatgpt_web_conversation_init_response,
-        parse_codex_backend_me_response, parse_codex_wham_reset_credits_detail_response,
-        parse_codex_wham_usage_response, parse_gemini_cli_retrieve_user_quota_response,
+        normalize_codex_reset_credit_consume_outcome, parse_antigravity_usage_response,
+        parse_chatgpt_web_conversation_init_response, parse_codex_backend_me_response,
+        parse_codex_wham_reset_credits_detail_response, parse_codex_wham_usage_response,
+        parse_gemini_cli_retrieve_user_quota_response,
         parse_gemini_cli_v1internal_credits_response, parse_windsurf_model_configs_response,
         parse_windsurf_rate_limit_response, parse_windsurf_user_status_response,
         provider_auto_remove_quota_exhausted_keys, quota_refresh_success_invalid_state,
@@ -2538,6 +2584,40 @@ mod tests {
         assert!(parsed.get("secondary_used_percent").is_none());
     }
 
+    #[test]
+    fn parses_antigravity_usage_response_labels_opaque_reset_credit_keys() {
+        let parsed = parse_antigravity_usage_response(
+            &json!({
+                "models": {
+                    "RateLimitResetCredit_05cbb6eeeb9c81918e011d8300f9ebfb": {
+                        "quotaInfo": {
+                            "remainingFraction": 0.75,
+                            "resetTime": "2030-01-01T00:00:00Z"
+                        }
+                    },
+                    "gemini-3-pro-preview": {
+                        "displayName": "Gemini 3 Pro Preview",
+                        "quotaInfo": {
+                            "remainingFraction": 0.25
+                        }
+                    }
+                }
+            }),
+            1_777_000_000,
+        )
+        .expect("antigravity quota should parse");
+
+        assert_eq!(
+            parsed["models"]["RateLimitResetCredit_05cbb6eeeb9c81918e011d8300f9ebfb"]
+                ["display_name"],
+            json!("Key-1")
+        );
+        assert_eq!(
+            parsed["models"]["gemini-3-pro-preview"]["display_name"],
+            json!("Gemini 3 Pro Preview")
+        );
+    }
+
     #[test]
     fn parses_gemini_cli_retrieve_user_quota_buckets() {
         let parsed = parse_gemini_cli_retrieve_user_quota_response(
@@ -2595,6 +2675,38 @@ mod tests {
         );
     }
 
+    #[test]
+    fn parses_gemini_cli_quota_buckets_labels_opaque_reset_credit_keys() {
+        let parsed = parse_gemini_cli_retrieve_user_quota_response(
+            &json!({
+                "buckets": [
+                    {
+                        "tokenType": "RateLimitResetCredit_05cbb6eeeb9c81918e011d8300f9ebfb",
+                        "remainingFraction": 0.5
+                    },
+                    {
+                        "modelId": "RateLimitResetCredit_d18b8aac4ec2472697ad747a14975ac8",
+                        "displayName": "RateLimitResetCredit_d18b8aac4ec2472697ad747a14975ac8",
+                        "remainingFraction": 0.25
+                    }
+                ]
+            }),
+            1_777_000_000,
+        )
+        .expect("gemini cli quota should parse");
+
+        assert_eq!(
+            parsed["quota_by_model"]["RateLimitResetCredit_05cbb6eeeb9c81918e011d8300f9ebfb"]
+                ["display_name"],
+            json!("Key-1")
+        );
+        assert_eq!(
+            parsed["quota_by_model"]["RateLimitResetCredit_d18b8aac4ec2472697ad747a14975ac8"]
+                ["display_name"],
+            json!("Key-2")
+        );
+    }
+
     #[test]
     fn parses_gemini_cli_v1internal_credits() {
         let parsed = parse_gemini_cli_v1internal_credits_response(
diff --git a/crates/aether-admin/src/system.rs b/crates/aether-admin/src/system.rs
index 8d0b65a23..6070c8265 100644
--- a/crates/aether-admin/src/system.rs
+++ b/crates/aether-admin/src/system.rs
@@ -805,6 +805,12 @@ const ADMIN_API_FORMAT_DEFINITIONS: &[AdminApiFormatDefinition] = &[
         default_path: "/v1beta/models/{model}:{action}",
         aliases: &["gemini", "google", "vertex"],
     },
+    AdminApiFormatDefinition {
+        value: "gemini:interactions",
+        label: "Gemini Interactions",
+        default_path: "/v1/interactions",
+        aliases: &["gemini_interactions", "interactions"],
+    },
     AdminApiFormatDefinition {
         value: "gemini:embedding",
         label: "Gemini Embedding",
diff --git a/crates/aether-ai-formats/src/api.rs b/crates/aether-ai-formats/src/api.rs
index 666f936f2..041a504ef 100644
--- a/crates/aether-ai-formats/src/api.rs
+++ b/crates/aether-ai-formats/src/api.rs
@@ -19,7 +19,10 @@ pub use crate::contracts::{
     GEMINI_CLI_SYNC_SUCCESS_REPORT_KIND, GEMINI_EMBEDDING_SYNC_PLAN_KIND,
     GEMINI_EMBEDDING_SYNC_SUCCESS_REPORT_KIND, GEMINI_FILES_DELETE_PLAN_KIND,
     GEMINI_FILES_DOWNLOAD_PLAN_KIND, GEMINI_FILES_GET_PLAN_KIND, GEMINI_FILES_LIST_PLAN_KIND,
-    GEMINI_FILES_UPLOAD_PLAN_KIND, GEMINI_VIDEO_CANCEL_SYNC_PLAN_KIND,
+    GEMINI_FILES_UPLOAD_PLAN_KIND, GEMINI_INTERACTIONS_STREAM_PLAN_KIND,
+    GEMINI_INTERACTIONS_STREAM_SUCCESS_REPORT_KIND, GEMINI_INTERACTIONS_SYNC_ERROR_REPORT_KIND,
+    GEMINI_INTERACTIONS_SYNC_FINALIZE_REPORT_KIND, GEMINI_INTERACTIONS_SYNC_PLAN_KIND,
+    GEMINI_INTERACTIONS_SYNC_SUCCESS_REPORT_KIND, GEMINI_VIDEO_CANCEL_SYNC_PLAN_KIND,
     GEMINI_VIDEO_CREATE_SYNC_FINALIZE_REPORT_KIND, GEMINI_VIDEO_CREATE_SYNC_PLAN_KIND,
     OPENAI_CHAT_STREAM_PLAN_KIND, OPENAI_CHAT_STREAM_SUCCESS_REPORT_KIND,
     OPENAI_CHAT_SYNC_ERROR_REPORT_KIND, OPENAI_CHAT_SYNC_FINALIZE_REPORT_KIND,
@@ -256,14 +259,15 @@ pub use aether_ai_formats::{
     from_claude_to_canonical_response, from_gemini_to_canonical_request,
     from_gemini_to_canonical_response, from_openai_chat_to_canonical_request,
     from_openai_chat_to_canonical_response, from_openai_responses_to_canonical_request,
-    from_openai_responses_to_canonical_response, parse_request_pure, parse_response_pure,
-    request_candidate_api_format_preference, request_candidate_api_formats,
-    request_conversion_kind, request_conversion_requires_enable_flag,
-    sync_chat_response_conversion_kind, sync_cli_response_conversion_kind, CanonicalContentBlock,
-    CanonicalGenerationConfig, CanonicalInstruction, CanonicalMessage, CanonicalRequest,
-    CanonicalResponse, CanonicalResponseFormat, CanonicalResponseOutput, CanonicalRole,
-    CanonicalStopReason, CanonicalThinkingConfig, CanonicalToolChoice, CanonicalToolDefinition,
-    CanonicalUsage, ConversionFieldRecord, ConversionFieldStatus, ConversionReport, Converted,
-    FormatContext, FormatError, FormatFamily, FormatId, FormatProfile, RequestConversionKind,
+    from_openai_responses_to_canonical_response, is_gemini_interactions_api_format,
+    parse_request_pure, parse_response_pure, request_candidate_api_format_preference,
+    request_candidate_api_formats, request_conversion_kind,
+    request_conversion_requires_enable_flag, sync_chat_response_conversion_kind,
+    sync_cli_response_conversion_kind, CanonicalContentBlock, CanonicalGenerationConfig,
+    CanonicalInstruction, CanonicalMessage, CanonicalRequest, CanonicalResponse,
+    CanonicalResponseFormat, CanonicalResponseOutput, CanonicalRole, CanonicalStopReason,
+    CanonicalThinkingConfig, CanonicalToolChoice, CanonicalToolDefinition, CanonicalUsage,
+    ConversionFieldRecord, ConversionFieldStatus, ConversionReport, Converted, FormatContext,
+    FormatError, FormatFamily, FormatId, FormatProfile, RequestConversionKind,
     SyncChatResponseConversionKind, SyncCliResponseConversionKind,
 };
diff --git a/crates/aether-ai-formats/src/contracts/mod.rs b/crates/aether-ai-formats/src/contracts/mod.rs
index 7580a915e..3f7752f66 100644
--- a/crates/aether-ai-formats/src/contracts/mod.rs
+++ b/crates/aether-ai-formats/src/contracts/mod.rs
@@ -16,14 +16,16 @@ pub use plan_kinds::{
     CLAUDE_CLI_SYNC_PLAN_KIND, GEMINI_CHAT_STREAM_PLAN_KIND, GEMINI_CHAT_SYNC_PLAN_KIND,
     GEMINI_CLI_STREAM_PLAN_KIND, GEMINI_CLI_SYNC_PLAN_KIND, GEMINI_EMBEDDING_SYNC_PLAN_KIND,
     GEMINI_FILES_DELETE_PLAN_KIND, GEMINI_FILES_DOWNLOAD_PLAN_KIND, GEMINI_FILES_GET_PLAN_KIND,
-    GEMINI_FILES_LIST_PLAN_KIND, GEMINI_FILES_UPLOAD_PLAN_KIND, GEMINI_VIDEO_CANCEL_SYNC_PLAN_KIND,
-    GEMINI_VIDEO_CREATE_SYNC_PLAN_KIND, OPENAI_CHAT_STREAM_PLAN_KIND, OPENAI_CHAT_SYNC_PLAN_KIND,
-    OPENAI_EMBEDDING_SYNC_PLAN_KIND, OPENAI_IMAGE_STREAM_PLAN_KIND, OPENAI_IMAGE_SYNC_PLAN_KIND,
-    OPENAI_RERANK_SYNC_PLAN_KIND, OPENAI_RESPONSES_COMPACT_STREAM_PLAN_KIND,
-    OPENAI_RESPONSES_COMPACT_SYNC_PLAN_KIND, OPENAI_RESPONSES_STREAM_PLAN_KIND,
-    OPENAI_RESPONSES_SYNC_PLAN_KIND, OPENAI_VIDEO_CANCEL_SYNC_PLAN_KIND,
-    OPENAI_VIDEO_CONTENT_PLAN_KIND, OPENAI_VIDEO_CREATE_SYNC_PLAN_KIND,
-    OPENAI_VIDEO_DELETE_SYNC_PLAN_KIND, OPENAI_VIDEO_REMIX_SYNC_PLAN_KIND,
+    GEMINI_FILES_LIST_PLAN_KIND, GEMINI_FILES_UPLOAD_PLAN_KIND,
+    GEMINI_INTERACTIONS_STREAM_PLAN_KIND, GEMINI_INTERACTIONS_SYNC_PLAN_KIND,
+    GEMINI_VIDEO_CANCEL_SYNC_PLAN_KIND, GEMINI_VIDEO_CREATE_SYNC_PLAN_KIND,
+    OPENAI_CHAT_STREAM_PLAN_KIND, OPENAI_CHAT_SYNC_PLAN_KIND, OPENAI_EMBEDDING_SYNC_PLAN_KIND,
+    OPENAI_IMAGE_STREAM_PLAN_KIND, OPENAI_IMAGE_SYNC_PLAN_KIND, OPENAI_RERANK_SYNC_PLAN_KIND,
+    OPENAI_RESPONSES_COMPACT_STREAM_PLAN_KIND, OPENAI_RESPONSES_COMPACT_SYNC_PLAN_KIND,
+    OPENAI_RESPONSES_STREAM_PLAN_KIND, OPENAI_RESPONSES_SYNC_PLAN_KIND,
+    OPENAI_VIDEO_CANCEL_SYNC_PLAN_KIND, OPENAI_VIDEO_CONTENT_PLAN_KIND,
+    OPENAI_VIDEO_CREATE_SYNC_PLAN_KIND, OPENAI_VIDEO_DELETE_SYNC_PLAN_KIND,
+    OPENAI_VIDEO_REMIX_SYNC_PLAN_KIND,
 };
 pub use report_kinds::{
     core_error_background_report_kind, core_error_default_client_api_format,
@@ -37,6 +39,8 @@ pub use report_kinds::{
     GEMINI_CHAT_SYNC_SUCCESS_REPORT_KIND, GEMINI_CLI_STREAM_SUCCESS_REPORT_KIND,
     GEMINI_CLI_SYNC_ERROR_REPORT_KIND, GEMINI_CLI_SYNC_FINALIZE_REPORT_KIND,
     GEMINI_CLI_SYNC_SUCCESS_REPORT_KIND, GEMINI_EMBEDDING_SYNC_SUCCESS_REPORT_KIND,
+    GEMINI_INTERACTIONS_STREAM_SUCCESS_REPORT_KIND, GEMINI_INTERACTIONS_SYNC_ERROR_REPORT_KIND,
+    GEMINI_INTERACTIONS_SYNC_FINALIZE_REPORT_KIND, GEMINI_INTERACTIONS_SYNC_SUCCESS_REPORT_KIND,
     GEMINI_VIDEO_CREATE_SYNC_FINALIZE_REPORT_KIND, OPENAI_CHAT_STREAM_SUCCESS_REPORT_KIND,
     OPENAI_CHAT_SYNC_ERROR_REPORT_KIND, OPENAI_CHAT_SYNC_FINALIZE_REPORT_KIND,
     OPENAI_CHAT_SYNC_SUCCESS_REPORT_KIND, OPENAI_EMBEDDING_SYNC_ERROR_REPORT_KIND,
diff --git a/crates/aether-ai-formats/src/contracts/plan_kinds.rs b/crates/aether-ai-formats/src/contracts/plan_kinds.rs
index 62a24bfb3..d0d4eecb7 100644
--- a/crates/aether-ai-formats/src/contracts/plan_kinds.rs
+++ b/crates/aether-ai-formats/src/contracts/plan_kinds.rs
@@ -14,6 +14,7 @@ pub const GEMINI_VIDEO_CANCEL_SYNC_PLAN_KIND: &str = "gemini_video_cancel_sync";
 pub const OPENAI_CHAT_STREAM_PLAN_KIND: &str = "openai_chat_stream";
 pub const CLAUDE_CHAT_STREAM_PLAN_KIND: &str = "claude_chat_stream";
 pub const GEMINI_CHAT_STREAM_PLAN_KIND: &str = "gemini_chat_stream";
+pub const GEMINI_INTERACTIONS_STREAM_PLAN_KIND: &str = "gemini_interactions_stream";
 pub const OPENAI_RESPONSES_STREAM_PLAN_KIND: &str = "openai_responses_stream";
 pub const OPENAI_RESPONSES_COMPACT_STREAM_PLAN_KIND: &str = "openai_responses_compact_stream";
 pub const CLAUDE_CLI_STREAM_PLAN_KIND: &str = "claude_cli_stream";
@@ -27,6 +28,7 @@ pub const OPENAI_RESPONSES_SYNC_PLAN_KIND: &str = "openai_responses_sync";
 pub const OPENAI_RESPONSES_COMPACT_SYNC_PLAN_KIND: &str = "openai_responses_compact_sync";
 pub const CLAUDE_CHAT_SYNC_PLAN_KIND: &str = "claude_chat_sync";
 pub const GEMINI_CHAT_SYNC_PLAN_KIND: &str = "gemini_chat_sync";
+pub const GEMINI_INTERACTIONS_SYNC_PLAN_KIND: &str = "gemini_interactions_sync";
 pub const CLAUDE_CLI_SYNC_PLAN_KIND: &str = "claude_cli_sync";
 pub const GEMINI_CLI_SYNC_PLAN_KIND: &str = "gemini_cli_sync";
 
diff --git a/crates/aether-ai-formats/src/contracts/report_kinds.rs b/crates/aether-ai-formats/src/contracts/report_kinds.rs
index b1e3896ba..bb2e769e0 100644
--- a/crates/aether-ai-formats/src/contracts/report_kinds.rs
+++ b/crates/aether-ai-formats/src/contracts/report_kinds.rs
@@ -1,13 +1,14 @@
 use crate::contracts::{
     CLAUDE_CHAT_SYNC_PLAN_KIND, CLAUDE_CLI_SYNC_PLAN_KIND, GEMINI_CHAT_SYNC_PLAN_KIND,
-    GEMINI_CLI_SYNC_PLAN_KIND, OPENAI_CHAT_SYNC_PLAN_KIND, OPENAI_EMBEDDING_SYNC_PLAN_KIND,
-    OPENAI_IMAGE_STREAM_PLAN_KIND, OPENAI_IMAGE_SYNC_PLAN_KIND,
+    GEMINI_CLI_SYNC_PLAN_KIND, GEMINI_INTERACTIONS_SYNC_PLAN_KIND, OPENAI_CHAT_SYNC_PLAN_KIND,
+    OPENAI_EMBEDDING_SYNC_PLAN_KIND, OPENAI_IMAGE_STREAM_PLAN_KIND, OPENAI_IMAGE_SYNC_PLAN_KIND,
     OPENAI_RESPONSES_COMPACT_SYNC_PLAN_KIND, OPENAI_RESPONSES_SYNC_PLAN_KIND,
 };
 
 pub const OPENAI_CHAT_SYNC_FINALIZE_REPORT_KIND: &str = "openai_chat_sync_finalize";
 pub const CLAUDE_CHAT_SYNC_FINALIZE_REPORT_KIND: &str = "claude_chat_sync_finalize";
 pub const GEMINI_CHAT_SYNC_FINALIZE_REPORT_KIND: &str = "gemini_chat_sync_finalize";
+pub const GEMINI_INTERACTIONS_SYNC_FINALIZE_REPORT_KIND: &str = "gemini_interactions_sync_finalize";
 pub const OPENAI_RESPONSES_SYNC_FINALIZE_REPORT_KIND: &str = "openai_responses_sync_finalize";
 pub const OPENAI_RESPONSES_COMPACT_SYNC_FINALIZE_REPORT_KIND: &str =
     "openai_responses_compact_sync_finalize";
@@ -23,6 +24,7 @@ const LEGACY_OPENAI_COMPACT_SYNC_FINALIZE_REPORT_KIND: &str = "openai_compact_sy
 pub const OPENAI_CHAT_SYNC_SUCCESS_REPORT_KIND: &str = "openai_chat_sync_success";
 pub const CLAUDE_CHAT_SYNC_SUCCESS_REPORT_KIND: &str = "claude_chat_sync_success";
 pub const GEMINI_CHAT_SYNC_SUCCESS_REPORT_KIND: &str = "gemini_chat_sync_success";
+pub const GEMINI_INTERACTIONS_SYNC_SUCCESS_REPORT_KIND: &str = "gemini_interactions_sync_success";
 pub const OPENAI_RESPONSES_SYNC_SUCCESS_REPORT_KIND: &str = "openai_responses_sync_success";
 pub const OPENAI_RESPONSES_COMPACT_SYNC_SUCCESS_REPORT_KIND: &str =
     "openai_responses_compact_sync_success";
@@ -35,6 +37,8 @@ pub const GEMINI_CLI_SYNC_SUCCESS_REPORT_KIND: &str = "gemini_cli_sync_success";
 pub const OPENAI_CHAT_STREAM_SUCCESS_REPORT_KIND: &str = "openai_chat_stream_success";
 pub const CLAUDE_CHAT_STREAM_SUCCESS_REPORT_KIND: &str = "claude_chat_stream_success";
 pub const GEMINI_CHAT_STREAM_SUCCESS_REPORT_KIND: &str = "gemini_chat_stream_success";
+pub const GEMINI_INTERACTIONS_STREAM_SUCCESS_REPORT_KIND: &str =
+    "gemini_interactions_stream_success";
 pub const OPENAI_RESPONSES_STREAM_SUCCESS_REPORT_KIND: &str = "openai_responses_stream_success";
 pub const OPENAI_RESPONSES_COMPACT_STREAM_SUCCESS_REPORT_KIND: &str =
     "openai_responses_compact_stream_success";
@@ -45,6 +49,7 @@ pub const GEMINI_CLI_STREAM_SUCCESS_REPORT_KIND: &str = "gemini_cli_stream_succe
 pub const OPENAI_CHAT_SYNC_ERROR_REPORT_KIND: &str = "openai_chat_sync_error";
 pub const CLAUDE_CHAT_SYNC_ERROR_REPORT_KIND: &str = "claude_chat_sync_error";
 pub const GEMINI_CHAT_SYNC_ERROR_REPORT_KIND: &str = "gemini_chat_sync_error";
+pub const GEMINI_INTERACTIONS_SYNC_ERROR_REPORT_KIND: &str = "gemini_interactions_sync_error";
 pub const OPENAI_RESPONSES_SYNC_ERROR_REPORT_KIND: &str = "openai_responses_sync_error";
 pub const OPENAI_RESPONSES_COMPACT_SYNC_ERROR_REPORT_KIND: &str =
     "openai_responses_compact_sync_error";
@@ -58,6 +63,7 @@ pub fn implicit_sync_finalize_report_kind(plan_kind: &str) -> Option<&'static st
         OPENAI_CHAT_SYNC_PLAN_KIND => Some(OPENAI_CHAT_SYNC_FINALIZE_REPORT_KIND),
         CLAUDE_CHAT_SYNC_PLAN_KIND => Some(CLAUDE_CHAT_SYNC_FINALIZE_REPORT_KIND),
         GEMINI_CHAT_SYNC_PLAN_KIND => Some(GEMINI_CHAT_SYNC_FINALIZE_REPORT_KIND),
+        GEMINI_INTERACTIONS_SYNC_PLAN_KIND => Some(GEMINI_INTERACTIONS_SYNC_FINALIZE_REPORT_KIND),
         OPENAI_RESPONSES_SYNC_PLAN_KIND => Some(OPENAI_RESPONSES_SYNC_FINALIZE_REPORT_KIND),
         OPENAI_RESPONSES_COMPACT_SYNC_PLAN_KIND => {
             Some(OPENAI_RESPONSES_COMPACT_SYNC_FINALIZE_REPORT_KIND)
@@ -75,6 +81,7 @@ pub fn core_error_default_client_api_format(report_kind: &str) -> Option<&'stati
         OPENAI_CHAT_SYNC_FINALIZE_REPORT_KIND => Some("openai:chat"),
         CLAUDE_CHAT_SYNC_FINALIZE_REPORT_KIND => Some("claude:messages"),
         GEMINI_CHAT_SYNC_FINALIZE_REPORT_KIND => Some("gemini:generate_content"),
+        GEMINI_INTERACTIONS_SYNC_FINALIZE_REPORT_KIND => Some("gemini:interactions"),
         OPENAI_RESPONSES_SYNC_FINALIZE_REPORT_KIND => Some("openai:responses"),
         OPENAI_RESPONSES_COMPACT_SYNC_FINALIZE_REPORT_KIND => Some("openai:responses:compact"),
         OPENAI_EMBEDDING_SYNC_FINALIZE_REPORT_KIND => Some("openai:embedding"),
@@ -92,6 +99,9 @@ pub fn core_error_background_report_kind(report_kind: &str) -> Option<&'static s
         OPENAI_CHAT_SYNC_FINALIZE_REPORT_KIND => Some(OPENAI_CHAT_SYNC_ERROR_REPORT_KIND),
         CLAUDE_CHAT_SYNC_FINALIZE_REPORT_KIND => Some(CLAUDE_CHAT_SYNC_ERROR_REPORT_KIND),
         GEMINI_CHAT_SYNC_FINALIZE_REPORT_KIND => Some(GEMINI_CHAT_SYNC_ERROR_REPORT_KIND),
+        GEMINI_INTERACTIONS_SYNC_FINALIZE_REPORT_KIND => {
+            Some(GEMINI_INTERACTIONS_SYNC_ERROR_REPORT_KIND)
+        }
         OPENAI_RESPONSES_SYNC_FINALIZE_REPORT_KIND => Some(OPENAI_RESPONSES_SYNC_ERROR_REPORT_KIND),
         OPENAI_RESPONSES_COMPACT_SYNC_FINALIZE_REPORT_KIND => {
             Some(OPENAI_RESPONSES_COMPACT_SYNC_ERROR_REPORT_KIND)
@@ -115,6 +125,9 @@ pub fn core_success_background_report_kind(report_kind: &str) -> Option<&'static
         OPENAI_CHAT_SYNC_FINALIZE_REPORT_KIND => Some(OPENAI_CHAT_SYNC_SUCCESS_REPORT_KIND),
         CLAUDE_CHAT_SYNC_FINALIZE_REPORT_KIND => Some(CLAUDE_CHAT_SYNC_SUCCESS_REPORT_KIND),
         GEMINI_CHAT_SYNC_FINALIZE_REPORT_KIND => Some(GEMINI_CHAT_SYNC_SUCCESS_REPORT_KIND),
+        GEMINI_INTERACTIONS_SYNC_FINALIZE_REPORT_KIND => {
+            Some(GEMINI_INTERACTIONS_SYNC_SUCCESS_REPORT_KIND)
+        }
         OPENAI_IMAGE_SYNC_FINALIZE_REPORT_KIND => Some(OPENAI_IMAGE_SYNC_SUCCESS_REPORT_KIND),
         OPENAI_RESPONSES_SYNC_FINALIZE_REPORT_KIND => {
             Some(OPENAI_RESPONSES_SYNC_SUCCESS_REPORT_KIND)
diff --git a/crates/aether-ai-formats/src/formats/id.rs b/crates/aether-ai-formats/src/formats/id.rs
index f5f96e3ac..1e064f928 100644
--- a/crates/aether-ai-formats/src/formats/id.rs
+++ b/crates/aether-ai-formats/src/formats/id.rs
@@ -27,6 +27,7 @@ pub enum FormatId {
     OpenAiRerank,
     ClaudeMessages,
     GeminiGenerateContent,
+    GeminiInteractions,
     GeminiEmbedding,
     JinaEmbedding,
     JinaRerank,
@@ -51,7 +52,9 @@ impl FormatId {
             | Self::OpenAiEmbedding
             | Self::OpenAiRerank => FormatFamily::OpenAi,
             Self::ClaudeMessages => FormatFamily::Claude,
-            Self::GeminiGenerateContent | Self::GeminiEmbedding => FormatFamily::Gemini,
+            Self::GeminiGenerateContent | Self::GeminiInteractions | Self::GeminiEmbedding => {
+                FormatFamily::Gemini
+            }
             Self::JinaEmbedding | Self::JinaRerank => FormatFamily::Jina,
             Self::DoubaoEmbedding => FormatFamily::Doubao,
             Self::AliyunMultimodalEmbedding => FormatFamily::Aliyun,
@@ -74,6 +77,7 @@ impl FormatId {
             Self::OpenAiRerank => "openai:rerank",
             Self::ClaudeMessages => "claude:messages",
             Self::GeminiGenerateContent => "gemini:generate_content",
+            Self::GeminiInteractions => "gemini:interactions",
             Self::GeminiEmbedding => "gemini:embedding",
             Self::JinaEmbedding => "jina:embedding",
             Self::JinaRerank => "jina:rerank",
@@ -103,6 +107,12 @@ impl FromStr for FormatId {
             "openai:rerank" | "/v1/rerank" => Ok(Self::OpenAiRerank),
             "claude:messages" | "/v1/messages" => Ok(Self::ClaudeMessages),
             "gemini:generate_content" => Ok(Self::GeminiGenerateContent),
+            "gemini:interactions"
+            | "gemini:interaction"
+            | "gemini_interactions"
+            | "gemini_interaction"
+            | "/v1/interactions"
+            | "/v1beta/interactions" => Ok(Self::GeminiInteractions),
             "gemini:embedding" => Ok(Self::GeminiEmbedding),
             "jina:embedding" | "/jina/v1/embeddings" => Ok(Self::JinaEmbedding),
             "jina:rerank" | "/jina/v1/rerank" => Ok(Self::JinaRerank),
@@ -157,7 +167,12 @@ pub fn is_openai_responses_family_format(value: &str) -> bool {
 pub fn api_format_uses_body_stream_field(value: &str) -> bool {
     matches!(
         FormatId::parse(value).map(FormatId::canonical),
-        Some(FormatId::OpenAiChat | FormatId::OpenAiResponses | FormatId::ClaudeMessages)
+        Some(
+            FormatId::OpenAiChat
+                | FormatId::OpenAiResponses
+                | FormatId::ClaudeMessages
+                | FormatId::GeminiInteractions,
+        )
     )
 }
 
@@ -237,6 +252,33 @@ mod tests {
         }
     }
 
+    #[test]
+    fn parses_gemini_interactions_api_formats() {
+        use super::{FormatFamily, FormatProfile};
+
+        assert_eq!(
+            FormatId::parse("gemini:interactions"),
+            Some(FormatId::GeminiInteractions)
+        );
+        assert_eq!(
+            FormatId::parse("gemini_interactions"),
+            Some(FormatId::GeminiInteractions)
+        );
+        assert_eq!(
+            FormatId::parse("/v1/interactions"),
+            Some(FormatId::GeminiInteractions)
+        );
+        assert_eq!(
+            FormatId::GeminiInteractions.to_string(),
+            "gemini:interactions"
+        );
+        assert_eq!(FormatId::GeminiInteractions.family(), FormatFamily::Gemini);
+        assert_eq!(
+            FormatId::GeminiInteractions.profile(),
+            FormatProfile::Default
+        );
+    }
+
     #[test]
     fn parses_rerank_api_formats() {
         assert_eq!(
@@ -293,6 +335,10 @@ mod tests {
             normalize_api_format_alias("GEMINI:GENERATE_CONTENT"),
             "gemini:generate_content"
         );
+        assert_eq!(
+            normalize_api_format_alias("GEMINI_INTERACTIONS"),
+            "gemini:interactions"
+        );
         assert_eq!(
             normalize_api_format_alias("OPENAI:EMBEDDING"),
             "openai:embedding"
@@ -331,6 +377,10 @@ mod tests {
             api_format_storage_aliases("gemini:generate_content"),
             vec!["gemini:generate_content".to_string()]
         );
+        assert_eq!(
+            api_format_storage_aliases("gemini:interactions"),
+            vec!["gemini:interactions".to_string()]
+        );
         assert_eq!(
             api_format_storage_aliases("openai:embedding"),
             vec!["openai:embedding".to_string()]
@@ -364,6 +414,8 @@ mod tests {
         assert!(api_format_uses_body_stream_field("/v1/responses"));
         assert!(api_format_uses_body_stream_field("claude:messages"));
         assert!(api_format_uses_body_stream_field("/v1/messages"));
+        assert!(api_format_uses_body_stream_field("gemini:interactions"));
+        assert!(api_format_uses_body_stream_field("/v1/interactions"));
         assert!(!api_format_uses_body_stream_field(
             "openai:responses:compact"
         ));
diff --git a/crates/aether-ai-formats/src/formats/matrix.rs b/crates/aether-ai-formats/src/formats/matrix.rs
index f563eb4ab..be66d4833 100644
--- a/crates/aether-ai-formats/src/formats/matrix.rs
+++ b/crates/aether-ai-formats/src/formats/matrix.rs
@@ -45,6 +45,7 @@ const EMBEDDING_CANDIDATE_API_FORMATS: &[&str] = &[
     "aliyun:multimodal_embedding",
 ];
 const RERANK_CANDIDATE_API_FORMATS: &[&str] = &["openai:rerank", "jina:rerank"];
+const GEMINI_INTERACTIONS_CANDIDATE_API_FORMATS: &[&str] = &["gemini:interactions"];
 
 pub fn request_candidate_api_format_preference(
     client_api_format: &str,
@@ -56,6 +57,9 @@ pub fn request_candidate_api_format_preference(
     if client_api_format == "openai:responses:compact" {
         return (provider_api_format == "openai:responses:compact").then_some((0, 0));
     }
+    if is_gemini_interactions_api_format(client_api_format.as_str()) {
+        return (provider_api_format == "gemini:interactions").then_some((0, 0));
+    }
     if is_embedding_api_format(client_api_format.as_str()) {
         return is_embedding_api_format(provider_api_format.as_str()).then_some((
             if client_api_format == provider_api_format {
@@ -105,6 +109,9 @@ pub fn request_candidate_api_formats(
     if client_api_format == "openai:responses:compact" {
         return vec!["openai:responses:compact"];
     }
+    if is_gemini_interactions_api_format(client_api_format.as_str()) {
+        return GEMINI_INTERACTIONS_CANDIDATE_API_FORMATS.to_vec();
+    }
     if is_embedding_api_format(client_api_format.as_str()) {
         let mut candidate_api_formats = EMBEDDING_CANDIDATE_API_FORMATS.to_vec();
         candidate_api_formats.sort_by_key(|provider_api_format| {
@@ -254,6 +261,10 @@ pub fn is_rerank_api_format(api_format: &str) -> bool {
     )
 }
 
+pub fn is_gemini_interactions_api_format(api_format: &str) -> bool {
+    normalize_api_format_alias(api_format) == "gemini:interactions"
+}
+
 pub fn parse_non_compact_standard_api_format(
     api_format: &str,
 ) -> Option<(&'static str, &'static str)> {
@@ -270,6 +281,7 @@ pub fn api_data_format_id(api_format: &str) -> Option<&'static str> {
     match normalize_api_format_alias(api_format).as_str() {
         "claude:messages" => Some("claude"),
         "gemini:generate_content" => Some("gemini"),
+        "gemini:interactions" => Some("gemini_interactions"),
         "openai:chat" => Some("openai_chat"),
         "openai:responses" | "openai:responses:compact" => Some("openai_responses"),
         "openai:embedding"
@@ -313,11 +325,12 @@ fn rerank_api_format_priority(api_format: &str) -> u8 {
 #[cfg(test)]
 mod tests {
     use super::{
-        api_data_format_id, is_embedding_api_format, is_rerank_api_format,
-        request_candidate_api_format_preference, request_candidate_api_formats,
-        request_conversion_kind, request_conversion_requires_enable_flag,
-        sync_chat_response_conversion_kind, sync_cli_response_conversion_kind,
-        RequestConversionKind, SyncChatResponseConversionKind, SyncCliResponseConversionKind,
+        api_data_format_id, is_embedding_api_format, is_gemini_interactions_api_format,
+        is_rerank_api_format, request_candidate_api_format_preference,
+        request_candidate_api_formats, request_conversion_kind,
+        request_conversion_requires_enable_flag, sync_chat_response_conversion_kind,
+        sync_cli_response_conversion_kind, RequestConversionKind, SyncChatResponseConversionKind,
+        SyncCliResponseConversionKind,
     };
 
     fn expected_request_conversion_kind(provider_api_format: &str) -> RequestConversionKind {
@@ -581,6 +594,38 @@ mod tests {
         }
     }
 
+    #[test]
+    fn gemini_interactions_stays_same_format_only() {
+        assert!(is_gemini_interactions_api_format("gemini:interactions"));
+        assert_eq!(
+            request_candidate_api_formats("gemini:interactions", false),
+            vec!["gemini:interactions"]
+        );
+        assert_eq!(
+            request_candidate_api_format_preference("gemini:interactions", "gemini:interactions"),
+            Some((0, 0))
+        );
+        assert_eq!(
+            request_candidate_api_format_preference(
+                "gemini:interactions",
+                "gemini:generate_content"
+            ),
+            None
+        );
+        assert_eq!(
+            request_conversion_kind("gemini:interactions", "gemini:generate_content"),
+            None
+        );
+        assert_eq!(
+            request_conversion_kind("gemini:generate_content", "gemini:interactions"),
+            None
+        );
+        assert_eq!(
+            api_data_format_id("gemini:interactions"),
+            Some("gemini_interactions")
+        );
+    }
+
     #[test]
     fn rerank_candidate_registry_excludes_chat_and_embedding_formats() {
         assert_eq!(
diff --git a/crates/aether-ai-formats/src/formats/registry.rs b/crates/aether-ai-formats/src/formats/registry.rs
index 02e423269..8cef3afb0 100644
--- a/crates/aether-ai-formats/src/formats/registry.rs
+++ b/crates/aether-ai-formats/src/formats/registry.rs
@@ -38,6 +38,7 @@ pub fn parse_request(
         FormatId::GeminiEmbedding => gemini::embedding::request::from(body, ctx),
         FormatId::DoubaoEmbedding => doubao::embedding::request::from(body, ctx),
         FormatId::AliyunMultimodalEmbedding => aliyun::embedding::request::from(body, ctx),
+        FormatId::GeminiInteractions => None,
     }
     .ok_or_else(|| FormatError::RequestParseFailed {
         format: source.as_str().to_string(),
@@ -71,6 +72,7 @@ fn emit_request_inner(
         FormatId::GeminiEmbedding => gemini::embedding::request::to(request, ctx),
         FormatId::DoubaoEmbedding => doubao::embedding::request::to(request, ctx),
         FormatId::AliyunMultimodalEmbedding => aliyun::embedding::request::to(request, ctx),
+        FormatId::GeminiInteractions => None,
     }
     .ok_or_else(|| FormatError::RequestEmitFailed {
         format: target.as_str().to_string(),
@@ -194,7 +196,8 @@ pub fn parse_response(
         | FormatId::JinaRerank
         | FormatId::GeminiEmbedding
         | FormatId::DoubaoEmbedding
-        | FormatId::AliyunMultimodalEmbedding => None,
+        | FormatId::AliyunMultimodalEmbedding
+        | FormatId::GeminiInteractions => None,
     }
     .ok_or_else(|| FormatError::ResponseParseFailed {
         format: source.as_str().to_string(),
@@ -231,7 +234,8 @@ fn emit_response_inner(
         | FormatId::JinaRerank
         | FormatId::GeminiEmbedding
         | FormatId::DoubaoEmbedding
-        | FormatId::AliyunMultimodalEmbedding => None,
+        | FormatId::AliyunMultimodalEmbedding
+        | FormatId::GeminiInteractions => None,
     }
     .ok_or_else(|| FormatError::ResponseEmitFailed {
         format: target.as_str().to_string(),
@@ -523,6 +527,24 @@ fn standard_request_root_field_is_audited(source: FormatId, key: &str) -> bool {
                 | "tool_config"
                 | "tools"
         ),
+        FormatId::GeminiInteractions => matches!(
+            key,
+            "agent"
+                | "agent_config"
+                | "background"
+                | "generation_config"
+                | "input"
+                | "metadata"
+                | "model"
+                | "previous_interaction_id"
+                | "response_format"
+                | "safety_settings"
+                | "store"
+                | "stream"
+                | "system_instruction"
+                | "tool_config"
+                | "tools"
+        ),
         FormatId::OpenAiEmbedding
         | FormatId::OpenAiRerank
         | FormatId::GeminiEmbedding
@@ -981,6 +1003,7 @@ fn validate_source_response_stop_enums(
         }
         FormatId::ClaudeMessages => validate_claude_response_stop_reason(body),
         FormatId::GeminiGenerateContent => validate_gemini_response_finish_reasons(body, target),
+        FormatId::GeminiInteractions => Ok(()),
         FormatId::OpenAiEmbedding
         | FormatId::OpenAiRerank
         | FormatId::GeminiEmbedding
diff --git a/crates/aether-ai-formats/src/formats/shared/passthrough.rs b/crates/aether-ai-formats/src/formats/shared/passthrough.rs
index 63de6080c..a0fef4ed8 100644
--- a/crates/aether-ai-formats/src/formats/shared/passthrough.rs
+++ b/crates/aether-ai-formats/src/formats/shared/passthrough.rs
@@ -2,7 +2,9 @@ use crate::contracts::{
     CLAUDE_CHAT_STREAM_PLAN_KIND, CLAUDE_CHAT_SYNC_PLAN_KIND, CLAUDE_CLI_STREAM_PLAN_KIND,
     CLAUDE_CLI_SYNC_PLAN_KIND, GEMINI_CHAT_STREAM_PLAN_KIND, GEMINI_CHAT_SYNC_PLAN_KIND,
     GEMINI_CLI_STREAM_PLAN_KIND, GEMINI_CLI_SYNC_PLAN_KIND, GEMINI_EMBEDDING_SYNC_PLAN_KIND,
-    GEMINI_EMBEDDING_SYNC_SUCCESS_REPORT_KIND, OPENAI_EMBEDDING_SYNC_PLAN_KIND,
+    GEMINI_EMBEDDING_SYNC_SUCCESS_REPORT_KIND, GEMINI_INTERACTIONS_STREAM_PLAN_KIND,
+    GEMINI_INTERACTIONS_STREAM_SUCCESS_REPORT_KIND, GEMINI_INTERACTIONS_SYNC_PLAN_KIND,
+    GEMINI_INTERACTIONS_SYNC_SUCCESS_REPORT_KIND, OPENAI_EMBEDDING_SYNC_PLAN_KIND,
     OPENAI_RERANK_SYNC_PLAN_KIND,
 };
 
@@ -58,6 +60,13 @@ pub fn resolve_sync_spec(plan_kind: &str) -> Option<LocalSameFormatProviderSpec>
             family: LocalSameFormatProviderFamily::Gemini,
             require_streaming: false,
         }),
+        GEMINI_INTERACTIONS_SYNC_PLAN_KIND => Some(LocalSameFormatProviderSpec {
+            api_format: "gemini:interactions",
+            decision_kind: GEMINI_INTERACTIONS_SYNC_PLAN_KIND,
+            report_kind: GEMINI_INTERACTIONS_SYNC_SUCCESS_REPORT_KIND,
+            family: LocalSameFormatProviderFamily::Gemini,
+            require_streaming: false,
+        }),
         OPENAI_EMBEDDING_SYNC_PLAN_KIND => Some(LocalSameFormatProviderSpec {
             api_format: "openai:embedding",
             decision_kind: OPENAI_EMBEDDING_SYNC_PLAN_KIND,
@@ -106,6 +115,13 @@ pub fn resolve_stream_spec(plan_kind: &str) -> Option<LocalSameFormatProviderSpe
             family: LocalSameFormatProviderFamily::Gemini,
             require_streaming: true,
         }),
+        GEMINI_INTERACTIONS_STREAM_PLAN_KIND => Some(LocalSameFormatProviderSpec {
+            api_format: "gemini:interactions",
+            decision_kind: GEMINI_INTERACTIONS_STREAM_PLAN_KIND,
+            report_kind: GEMINI_INTERACTIONS_STREAM_SUCCESS_REPORT_KIND,
+            family: LocalSameFormatProviderFamily::Gemini,
+            require_streaming: true,
+        }),
         _ => None,
     }
 }
@@ -147,6 +163,21 @@ mod tests {
         assert!(!spec.require_streaming);
     }
 
+    #[test]
+    fn resolves_gemini_interactions_same_format_specs() {
+        let sync = resolve_sync_spec("gemini_interactions_sync").expect("sync spec");
+        assert_eq!(sync.api_format, "gemini:interactions");
+        assert_eq!(sync.report_kind, "gemini_interactions_sync_success");
+        assert_eq!(sync.family, super::LocalSameFormatProviderFamily::Gemini);
+        assert!(!sync.require_streaming);
+
+        let stream = resolve_stream_spec("gemini_interactions_stream").expect("stream spec");
+        assert_eq!(stream.api_format, "gemini:interactions");
+        assert_eq!(stream.report_kind, "gemini_interactions_stream_success");
+        assert_eq!(stream.family, super::LocalSameFormatProviderFamily::Gemini);
+        assert!(stream.require_streaming);
+    }
+
     #[test]
     fn resolves_openai_rerank_sync_same_format_spec() {
         let spec = resolve_sync_spec("openai_rerank_sync").expect("spec");
diff --git a/crates/aether-ai-formats/src/formats/shared/routing.rs b/crates/aether-ai-formats/src/formats/shared/routing.rs
index b47251ae1..ac5b02874 100644
--- a/crates/aether-ai-formats/src/formats/shared/routing.rs
+++ b/crates/aether-ai-formats/src/formats/shared/routing.rs
@@ -6,14 +6,16 @@ use crate::contracts::{
     CLAUDE_CLI_SYNC_PLAN_KIND, GEMINI_CHAT_STREAM_PLAN_KIND, GEMINI_CHAT_SYNC_PLAN_KIND,
     GEMINI_CLI_STREAM_PLAN_KIND, GEMINI_CLI_SYNC_PLAN_KIND, GEMINI_EMBEDDING_SYNC_PLAN_KIND,
     GEMINI_FILES_DELETE_PLAN_KIND, GEMINI_FILES_DOWNLOAD_PLAN_KIND, GEMINI_FILES_GET_PLAN_KIND,
-    GEMINI_FILES_LIST_PLAN_KIND, GEMINI_FILES_UPLOAD_PLAN_KIND, GEMINI_VIDEO_CANCEL_SYNC_PLAN_KIND,
-    GEMINI_VIDEO_CREATE_SYNC_PLAN_KIND, OPENAI_CHAT_STREAM_PLAN_KIND, OPENAI_CHAT_SYNC_PLAN_KIND,
-    OPENAI_EMBEDDING_SYNC_PLAN_KIND, OPENAI_IMAGE_STREAM_PLAN_KIND, OPENAI_IMAGE_SYNC_PLAN_KIND,
-    OPENAI_RERANK_SYNC_PLAN_KIND, OPENAI_RESPONSES_COMPACT_STREAM_PLAN_KIND,
-    OPENAI_RESPONSES_COMPACT_SYNC_PLAN_KIND, OPENAI_RESPONSES_STREAM_PLAN_KIND,
-    OPENAI_RESPONSES_SYNC_PLAN_KIND, OPENAI_VIDEO_CANCEL_SYNC_PLAN_KIND,
-    OPENAI_VIDEO_CONTENT_PLAN_KIND, OPENAI_VIDEO_CREATE_SYNC_PLAN_KIND,
-    OPENAI_VIDEO_DELETE_SYNC_PLAN_KIND, OPENAI_VIDEO_REMIX_SYNC_PLAN_KIND,
+    GEMINI_FILES_LIST_PLAN_KIND, GEMINI_FILES_UPLOAD_PLAN_KIND,
+    GEMINI_INTERACTIONS_STREAM_PLAN_KIND, GEMINI_INTERACTIONS_SYNC_PLAN_KIND,
+    GEMINI_VIDEO_CANCEL_SYNC_PLAN_KIND, GEMINI_VIDEO_CREATE_SYNC_PLAN_KIND,
+    OPENAI_CHAT_STREAM_PLAN_KIND, OPENAI_CHAT_SYNC_PLAN_KIND, OPENAI_EMBEDDING_SYNC_PLAN_KIND,
+    OPENAI_IMAGE_STREAM_PLAN_KIND, OPENAI_IMAGE_SYNC_PLAN_KIND, OPENAI_RERANK_SYNC_PLAN_KIND,
+    OPENAI_RESPONSES_COMPACT_STREAM_PLAN_KIND, OPENAI_RESPONSES_COMPACT_SYNC_PLAN_KIND,
+    OPENAI_RESPONSES_STREAM_PLAN_KIND, OPENAI_RESPONSES_SYNC_PLAN_KIND,
+    OPENAI_VIDEO_CANCEL_SYNC_PLAN_KIND, OPENAI_VIDEO_CONTENT_PLAN_KIND,
+    OPENAI_VIDEO_CREATE_SYNC_PLAN_KIND, OPENAI_VIDEO_DELETE_SYNC_PLAN_KIND,
+    OPENAI_VIDEO_REMIX_SYNC_PLAN_KIND,
 };
 use crate::formats::openai::image::request::is_openai_image_stream_request;
 
@@ -69,6 +71,14 @@ pub fn resolve_execution_runtime_stream_plan_kind(
         ));
     }
 
+    if route_family == Some("gemini")
+        && route_kind == Some("interactions")
+        && *method == Method::POST
+        && matches!(path, "/v1/interactions" | "/v1beta/interactions")
+    {
+        return Some(GEMINI_INTERACTIONS_STREAM_PLAN_KIND);
+    }
+
     if route_family == Some("antigravity")
         && route_kind == Some("stream_generate_content")
         && *method == Method::POST
@@ -182,6 +192,14 @@ pub fn resolve_execution_runtime_sync_plan_kind(
         return Some(GEMINI_EMBEDDING_SYNC_PLAN_KIND);
     }
 
+    if route_family == Some("gemini")
+        && route_kind == Some("interactions")
+        && *method == Method::POST
+        && matches!(path, "/v1/interactions" | "/v1beta/interactions")
+    {
+        return Some(GEMINI_INTERACTIONS_SYNC_PLAN_KIND);
+    }
+
     if route_family == Some("openai")
         && route_kind == Some("chat")
         && *method == Method::POST
@@ -390,7 +408,8 @@ pub fn is_matching_stream_request(
         | OPENAI_RESPONSES_STREAM_PLAN_KIND
         | OPENAI_RESPONSES_COMPACT_STREAM_PLAN_KIND
         | CLAUDE_CLI_STREAM_PLAN_KIND
-        | OPENAI_IMAGE_STREAM_PLAN_KIND => body_json
+        | OPENAI_IMAGE_STREAM_PLAN_KIND
+        | GEMINI_INTERACTIONS_STREAM_PLAN_KIND => body_json
             .get("stream")
             .and_then(|value| value.as_bool())
             .unwrap_or(false),
@@ -428,6 +447,7 @@ pub fn supports_sync_execution_decision_kind(plan_kind: &str) -> bool {
             | GEMINI_CHAT_SYNC_PLAN_KIND
             | GEMINI_CLI_SYNC_PLAN_KIND
             | GEMINI_EMBEDDING_SYNC_PLAN_KIND
+            | GEMINI_INTERACTIONS_SYNC_PLAN_KIND
             | GEMINI_FILES_UPLOAD_PLAN_KIND
             | OPENAI_VIDEO_CREATE_SYNC_PLAN_KIND
             | OPENAI_VIDEO_REMIX_SYNC_PLAN_KIND
@@ -452,6 +472,7 @@ pub fn supports_stream_execution_decision_kind(plan_kind: &str) -> bool {
             | OPENAI_IMAGE_STREAM_PLAN_KIND
             | CLAUDE_CLI_STREAM_PLAN_KIND
             | GEMINI_CLI_STREAM_PLAN_KIND
+            | GEMINI_INTERACTIONS_STREAM_PLAN_KIND
             | GEMINI_FILES_DOWNLOAD_PLAN_KIND
             | OPENAI_VIDEO_CONTENT_PLAN_KIND
     )
@@ -473,6 +494,7 @@ mod tests {
         CLAUDE_CHAT_STREAM_PLAN_KIND, CLAUDE_CHAT_SYNC_PLAN_KIND, CLAUDE_CLI_STREAM_PLAN_KIND,
         CLAUDE_CLI_SYNC_PLAN_KIND, GEMINI_CHAT_STREAM_PLAN_KIND, GEMINI_CHAT_SYNC_PLAN_KIND,
         GEMINI_CLI_STREAM_PLAN_KIND, GEMINI_CLI_SYNC_PLAN_KIND, GEMINI_EMBEDDING_SYNC_PLAN_KIND,
+        GEMINI_INTERACTIONS_STREAM_PLAN_KIND, GEMINI_INTERACTIONS_SYNC_PLAN_KIND,
         OPENAI_CHAT_STREAM_PLAN_KIND, OPENAI_CHAT_SYNC_PLAN_KIND, OPENAI_EMBEDDING_SYNC_PLAN_KIND,
         OPENAI_IMAGE_STREAM_PLAN_KIND, OPENAI_IMAGE_SYNC_PLAN_KIND, OPENAI_RERANK_SYNC_PLAN_KIND,
         OPENAI_RESPONSES_COMPACT_STREAM_PLAN_KIND, OPENAI_RESPONSES_COMPACT_SYNC_PLAN_KIND,
@@ -855,6 +877,62 @@ mod tests {
         ));
     }
 
+    #[test]
+    fn resolves_gemini_interactions_plan_kinds() {
+        assert_eq!(
+            resolve_execution_runtime_sync_plan_kind(
+                Some("ai_public"),
+                Some("gemini"),
+                Some("interactions"),
+                Some("api_key"),
+                &Method::POST,
+                "/v1/interactions",
+            ),
+            Some(GEMINI_INTERACTIONS_SYNC_PLAN_KIND)
+        );
+        assert_eq!(
+            resolve_execution_runtime_stream_plan_kind(
+                Some("ai_public"),
+                Some("gemini"),
+                Some("interactions"),
+                Some("api_key"),
+                &Method::POST,
+                "/v1/interactions",
+            ),
+            Some(GEMINI_INTERACTIONS_STREAM_PLAN_KIND)
+        );
+        assert_eq!(
+            resolve_execution_runtime_sync_plan_kind(
+                Some("ai_public"),
+                Some("gemini"),
+                Some("interactions"),
+                Some("api_key"),
+                &Method::POST,
+                "/v1beta/interactions",
+            ),
+            Some(GEMINI_INTERACTIONS_SYNC_PLAN_KIND)
+        );
+    }
+
+    #[test]
+    fn gemini_interactions_stream_plan_requires_body_stream_true() {
+        assert!(is_matching_stream_request(
+            GEMINI_INTERACTIONS_STREAM_PLAN_KIND,
+            "/v1/interactions",
+            &serde_json::json!({"stream": true})
+        ));
+        assert!(!is_matching_stream_request(
+            GEMINI_INTERACTIONS_STREAM_PLAN_KIND,
+            "/v1/interactions",
+            &serde_json::json!({"stream": false})
+        ));
+        assert!(!is_matching_stream_request(
+            GEMINI_INTERACTIONS_STREAM_PLAN_KIND,
+            "/v1/interactions",
+            &serde_json::json!({})
+        ));
+    }
+
     #[test]
     fn resolves_openai_rerank_sync_plan_kind() {
         assert_eq!(
diff --git a/crates/aether-ai-formats/src/formats/shared/stream_core/format_matrix.rs b/crates/aether-ai-formats/src/formats/shared/stream_core/format_matrix.rs
index 7d2e3101d..3ba6fb4c9 100644
--- a/crates/aether-ai-formats/src/formats/shared/stream_core/format_matrix.rs
+++ b/crates/aether-ai-formats/src/formats/shared/stream_core/format_matrix.rs
@@ -274,6 +274,7 @@ impl ProviderStreamParser {
             FormatId::OpenAiEmbedding
             | FormatId::OpenAiRerank
             | FormatId::GeminiEmbedding
+            | FormatId::GeminiInteractions
             | FormatId::JinaEmbedding
             | FormatId::JinaRerank
             | FormatId::DoubaoEmbedding
@@ -365,6 +366,7 @@ impl ClientStreamEmitter {
             FormatId::OpenAiEmbedding
             | FormatId::OpenAiRerank
             | FormatId::GeminiEmbedding
+            | FormatId::GeminiInteractions
             | FormatId::JinaEmbedding
             | FormatId::JinaRerank
             | FormatId::DoubaoEmbedding
@@ -472,7 +474,9 @@ fn parse_provider_error(
             parse_openai_error(payload)
         }
         FormatId::ClaudeMessages => parse_claude_error(payload),
-        FormatId::GeminiGenerateContent => parse_gemini_error(payload),
+        FormatId::GeminiGenerateContent | FormatId::GeminiInteractions => {
+            parse_gemini_error(payload)
+        }
         FormatId::OpenAiEmbedding
         | FormatId::OpenAiRerank
         | FormatId::GeminiEmbedding
diff --git a/crates/aether-ai-formats/src/lib.rs b/crates/aether-ai-formats/src/lib.rs
index 52523be2b..f49a6aee3 100644
--- a/crates/aether-ai-formats/src/lib.rs
+++ b/crates/aether-ai-formats/src/lib.rs
@@ -16,11 +16,11 @@ pub use formats::id::{
     is_openai_responses_format, normalize_api_format_alias, FormatFamily, FormatId, FormatProfile,
 };
 pub use formats::matrix::{
-    is_embedding_api_format, is_rerank_api_format, request_candidate_api_format_preference,
-    request_candidate_api_formats, request_conversion_kind,
-    request_conversion_requires_enable_flag, sync_chat_response_conversion_kind,
-    sync_cli_response_conversion_kind, RequestConversionKind, SyncChatResponseConversionKind,
-    SyncCliResponseConversionKind,
+    is_embedding_api_format, is_gemini_interactions_api_format, is_rerank_api_format,
+    request_candidate_api_format_preference, request_candidate_api_formats,
+    request_conversion_kind, request_conversion_requires_enable_flag,
+    sync_chat_response_conversion_kind, sync_cli_response_conversion_kind, RequestConversionKind,
+    SyncChatResponseConversionKind, SyncCliResponseConversionKind,
 };
 pub use formats::registry::{
     build_stream_transcoder, convert_request, convert_request_pure,
diff --git a/crates/aether-ai-serving/src/surface_spec.rs b/crates/aether-ai-serving/src/surface_spec.rs
index 181bcc0ae..3f0d228a6 100644
--- a/crates/aether-ai-serving/src/surface_spec.rs
+++ b/crates/aether-ai-serving/src/surface_spec.rs
@@ -142,6 +142,17 @@ pub fn extract_ai_standard_requested_model(body_json: &Value) -> Option<String>
         .map(ToOwned::to_owned)
 }
 
+pub fn extract_ai_gemini_body_requested_target(body_json: &Value) -> Option<String> {
+    extract_ai_standard_requested_model(body_json).or_else(|| {
+        body_json
+            .get("agent")
+            .and_then(Value::as_str)
+            .map(str::trim)
+            .filter(|value| !value.is_empty())
+            .map(ToOwned::to_owned)
+    })
+}
+
 pub fn extract_ai_requested_model_from_request_path(
     request_path: &str,
     body_json: &Value,
@@ -150,7 +161,7 @@ pub fn extract_ai_requested_model_from_request_path(
     match family {
         AiRequestedModelFamily::Standard => extract_ai_standard_requested_model(body_json),
         AiRequestedModelFamily::Gemini => extract_ai_gemini_model_from_path(request_path)
-            .or_else(|| extract_ai_standard_requested_model(body_json)),
+            .or_else(|| extract_ai_gemini_body_requested_target(body_json)),
     }
 }
 
@@ -245,4 +256,18 @@ mod tests {
 
         assert_eq!(requested_model.as_deref(), Some("gemini-cli"));
     }
+
+    #[test]
+    fn gemini_requested_model_parser_uses_body_agent_when_path_has_no_model() {
+        let requested_model = extract_ai_requested_model_from_request_path(
+            "/v1/interactions",
+            &serde_json::json!({ "agent": " antigravity-preview-05-2026 " }),
+            AiRequestedModelFamily::Gemini,
+        );
+
+        assert_eq!(
+            requested_model.as_deref(),
+            Some("antigravity-preview-05-2026")
+        );
+    }
 }
diff --git a/crates/aether-data/backfills/postgres/20260517012000_sync_legacy_enabled_active_flags.sql b/crates/aether-data/backfills/postgres/20260517012000_sync_legacy_enabled_active_flags.sql
new file mode 100644
index 000000000..382da687d
--- /dev/null
+++ b/crates/aether-data/backfills/postgres/20260517012000_sync_legacy_enabled_active_flags.sql
@@ -0,0 +1,47 @@
+DO $$
+BEGIN
+    IF EXISTS (
+        SELECT 1
+        FROM information_schema.columns
+        WHERE table_schema = 'public'
+          AND table_name = 'providers'
+          AND column_name = 'enabled'
+    ) THEN
+        UPDATE public.providers
+        SET
+            is_active = enabled,
+            updated_at = NOW()
+        WHERE enabled IS NOT NULL
+          AND is_active IS DISTINCT FROM enabled;
+    END IF;
+
+    IF EXISTS (
+        SELECT 1
+        FROM information_schema.columns
+        WHERE table_schema = 'public'
+          AND table_name = 'provider_endpoints'
+          AND column_name = 'enabled'
+    ) THEN
+        UPDATE public.provider_endpoints
+        SET
+            is_active = enabled,
+            updated_at = NOW()
+        WHERE enabled IS NOT NULL
+          AND is_active IS DISTINCT FROM enabled;
+    END IF;
+
+    IF EXISTS (
+        SELECT 1
+        FROM information_schema.columns
+        WHERE table_schema = 'public'
+          AND table_name = 'models'
+          AND column_name = 'enabled'
+    ) THEN
+        UPDATE public.models
+        SET
+            is_active = enabled,
+            updated_at = NOW()
+        WHERE enabled IS NOT NULL
+          AND is_active IS DISTINCT FROM enabled;
+    END IF;
+END $$;
diff --git a/crates/aether-data/src/lifecycle/backfill.rs b/crates/aether-data/src/lifecycle/backfill.rs
index f8fb87160..b9d42cdc3 100644
--- a/crates/aether-data/src/lifecycle/backfill.rs
+++ b/crates/aether-data/src/lifecycle/backfill.rs
@@ -312,7 +312,8 @@ mod tests {
                 20260422110000,
                 20260422120000,
                 20260504120000,
-                20260505120000
+                20260505120000,
+                20260517012000
             ]
         );
     }
@@ -328,7 +329,12 @@ mod tests {
         .collect::<Vec<_>>();
         assert_eq!(
             versions,
-            vec![20260422120000, 20260504120000, 20260505120000]
+            vec![
+                20260422120000,
+                20260504120000,
+                20260505120000,
+                20260517012000
+            ]
         );
     }
 
@@ -697,11 +703,12 @@ mod tests {
         let pending_before = pending_backfills(&pool)
             .await
             .expect("pending backfills should load");
-        assert_eq!(pending_before.len(), 4);
+        assert_eq!(pending_before.len(), 5);
         assert_eq!(pending_before[0].version, 20260422110000);
         assert_eq!(pending_before[1].version, 20260422120000);
         assert_eq!(pending_before[2].version, 20260504120000);
         assert_eq!(pending_before[3].version, 20260505120000);
+        assert_eq!(pending_before[4].version, 20260517012000);
 
         run_backfills(&pool)
             .await
@@ -723,7 +730,8 @@ mod tests {
                 20260422110000,
                 20260422120000,
                 20260504120000,
-                20260505120000
+                20260505120000,
+                20260517012000
             ]
         );
 
@@ -1385,6 +1393,6 @@ mod tests {
                 .fetch_one(&pool)
                 .await
                 .expect("backfill count should load");
-        assert_eq!(applied_count, 3);
+        assert_eq!(applied_count, 5);
     }
 }
diff --git a/crates/aether-model-fetch/src/transport.rs b/crates/aether-model-fetch/src/transport.rs
index 9da7f1a5d..1e18e2705 100644
--- a/crates/aether-model-fetch/src/transport.rs
+++ b/crates/aether-model-fetch/src/transport.rs
@@ -727,6 +727,7 @@ mod tests {
         build_gemini_cli_load_code_assist_plan, build_kiro_list_available_models_plan,
         build_models_fetch_execution_plan, build_standard_models_fetch_execution_plan,
         build_vertex_models_fetch_execution_plan, ModelFetchTransportRuntime,
+        ANTIGRAVITY_REQUEST_USER_AGENT,
     };
 
     struct TestRuntime {
@@ -1053,7 +1054,7 @@ mod tests {
         );
         assert_eq!(
             plan.headers.get("user-agent").map(String::as_str),
-            Some("antigravity")
+            Some(ANTIGRAVITY_REQUEST_USER_AGENT)
         );
         assert_eq!(
             plan.headers.get("x-client-name").map(String::as_str),
@@ -1100,7 +1101,7 @@ mod tests {
         );
         assert_eq!(
             plan.headers.get("user-agent").map(String::as_str),
-            Some("antigravity")
+            Some(ANTIGRAVITY_REQUEST_USER_AGENT)
         );
         assert_eq!(
             plan.headers.get("x-client-name").map(String::as_str),
diff --git a/crates/aether-provider-transport/src/antigravity/auth.rs b/crates/aether-provider-transport/src/antigravity/auth.rs
index ce5dfc998..52925427d 100644
--- a/crates/aether-provider-transport/src/antigravity/auth.rs
+++ b/crates/aether-provider-transport/src/antigravity/auth.rs
@@ -5,7 +5,8 @@ use serde_json::Value;
 use super::super::snapshot::GatewayProviderTransportSnapshot;
 
 pub const ANTIGRAVITY_PROVIDER_TYPE: &str = "antigravity";
-pub const ANTIGRAVITY_REQUEST_USER_AGENT: &str = "antigravity";
+pub const ANTIGRAVITY_REQUEST_USER_AGENT: &str =
+    "antigravity/cli/1.0.16 (aidev_client; os_type=linux; arch=arm64; auth_method=consumer)";
 const ANTIGRAVITY_CLIENT_NAME: &str = "antigravity";
 const ANTIGRAVITY_GOOG_API_CLIENT: &str = "gl-node/18.18.2 fire/0.8.6 grpc/1.10.x";
 
@@ -120,6 +121,10 @@ pub fn build_antigravity_static_client_headers(
             String::from("x-goog-api-client"),
             String::from(ANTIGRAVITY_GOOG_API_CLIENT),
         ),
+        (
+            String::from("user-agent"),
+            String::from(ANTIGRAVITY_REQUEST_USER_AGENT),
+        ),
     ]);
 
     if let Some(client_version) = client_version
@@ -267,8 +272,8 @@ mod tests {
     use serde_json::json;
 
     use super::{
-        resolve_local_antigravity_request_auth, AntigravityRequestAuth,
-        AntigravityRequestAuthSupport,
+        build_antigravity_static_client_headers, resolve_local_antigravity_request_auth,
+        AntigravityRequestAuth, AntigravityRequestAuthSupport, ANTIGRAVITY_REQUEST_USER_AGENT,
     };
     use crate::snapshot::{
         GatewayProviderTransportEndpoint, GatewayProviderTransportKey,
@@ -376,4 +381,26 @@ mod tests {
             })
         );
     }
+
+    #[test]
+    fn static_client_headers_use_native_antigravity_cli_user_agent() {
+        let headers = build_antigravity_static_client_headers(Some("1.0.16"), Some("session-abc"));
+
+        assert_eq!(
+            headers.get("user-agent").map(String::as_str),
+            Some(ANTIGRAVITY_REQUEST_USER_AGENT)
+        );
+        assert_eq!(
+            headers.get("x-client-name").map(String::as_str),
+            Some("antigravity")
+        );
+        assert_eq!(
+            headers.get("x-client-version").map(String::as_str),
+            Some("1.0.16")
+        );
+        assert_eq!(
+            headers.get("x-vscode-sessionid").map(String::as_str),
+            Some("session-abc")
+        );
+    }
 }
diff --git a/crates/aether-provider-transport/src/antigravity/request.rs b/crates/aether-provider-transport/src/antigravity/request.rs
index 6c97e6b20..0dd136cc5 100644
--- a/crates/aether-provider-transport/src/antigravity/request.rs
+++ b/crates/aether-provider-transport/src/antigravity/request.rs
@@ -141,6 +141,7 @@ mod tests {
         build_antigravity_safe_v1internal_request, classify_antigravity_safe_request_body,
         AntigravityEnvelopeRequestType, AntigravityRequestAuth, AntigravityRequestEnvelopeSupport,
     };
+    use crate::antigravity::ANTIGRAVITY_REQUEST_USER_AGENT;
 
     fn sample_auth() -> AntigravityRequestAuth {
         AntigravityRequestAuth {
@@ -228,7 +229,7 @@ mod tests {
         assert_eq!(envelope["project"], "project-ant-123");
         assert_eq!(envelope["requestId"], "request-ant-agent-123");
         assert_eq!(envelope["model"], "gemini-3.5-flash-low");
-        assert_eq!(envelope["userAgent"], "antigravity");
+        assert_eq!(envelope["userAgent"], ANTIGRAVITY_REQUEST_USER_AGENT);
         assert_eq!(envelope["requestType"], "agent");
         assert!(envelope["request"].get("model").is_none());
         assert!(envelope["request"].get("safetySettings").is_none());
diff --git a/crates/aether-provider-transport/src/conversion.rs b/crates/aether-provider-transport/src/conversion.rs
index 48b7fb930..c4fd5ccbb 100644
--- a/crates/aether-provider-transport/src/conversion.rs
+++ b/crates/aether-provider-transport/src/conversion.rs
@@ -4,6 +4,7 @@ use aether_ai_formats::formats::matrix::{
 };
 use aether_ai_formats::normalize_api_format_alias;
 
+use crate::antigravity::is_antigravity_provider_transport;
 use crate::auth::{
     resolve_local_gemini_auth, resolve_local_openai_bearer_auth, resolve_local_standard_auth,
 };
@@ -132,6 +133,11 @@ pub fn request_conversion_transport_unsupported_reason(
     {
         return local_windsurf_request_transport_unsupported_reason_with_network(transport);
     }
+    if is_antigravity_provider_transport(transport)
+        && normalize_api_format_alias(&transport.endpoint.api_format) == "gemini:generate_content"
+    {
+        return None;
+    }
 
     match normalize_api_format_alias(&transport.endpoint.api_format).as_str() {
         "openai:chat" => local_openai_chat_transport_unsupported_reason(transport),
@@ -658,6 +664,32 @@ mod tests {
         );
     }
 
+    #[test]
+    fn antigravity_gemini_transport_supports_standard_cross_format_conversion_via_envelope() {
+        let transport = transport_snapshot(
+            "antigravity",
+            "gemini:generate_content",
+            "oauth",
+            true,
+            None,
+        );
+
+        assert!(request_pair_allowed_for_transport(
+            &transport,
+            "openai:chat",
+            "gemini:generate_content"
+        ));
+        assert!(request_pair_allowed_for_transport(
+            &transport,
+            "openai:responses",
+            "gemini:generate_content"
+        ));
+        assert!(request_conversion_transport_supported(
+            &transport,
+            RequestConversionKind::ToGeminiStandard
+        ));
+    }
+
     #[test]
     fn vertex_gemini_embedding_transport_supports_openai_embedding_conversion() {
         let transport = transport_snapshot("vertex_ai", "gemini:embedding", "api_key", true, None);
diff --git a/crates/aether-provider-transport/src/request_url/mod.rs b/crates/aether-provider-transport/src/request_url/mod.rs
index e9d5b4ac4..67c62acb4 100644
--- a/crates/aether-provider-transport/src/request_url/mod.rs
+++ b/crates/aether-provider-transport/src/request_url/mod.rs
@@ -150,6 +150,9 @@ fn build_transport_request_url_inner(
             params.request_query,
             gemini_embedding_batch,
         ),
+        "gemini:interactions" => {
+            build_gemini_interactions_url(&transport.endpoint.base_url, params.request_query)
+        }
         "doubao:embedding" => build_passthrough_path_url(
             &transport.endpoint.base_url,
             "/embeddings",
@@ -345,7 +348,9 @@ fn build_transport_hook_url(
         _ => {}
     }
 
-    if is_antigravity_provider_transport(transport) {
+    if is_antigravity_provider_transport(transport)
+        && normalized_provider_api_format == "gemini:generate_content"
+    {
         let query = params.request_query.map(|raw| {
             form_urlencoded::parse(raw.as_bytes())
                 .into_owned()
@@ -398,7 +403,8 @@ fn build_path_params(
     }
     let provider_api_format =
         aether_ai_formats::normalize_api_format_alias(params.provider_api_format);
-    if provider_api_format.starts_with("gemini:") {
+    if provider_api_format == "gemini:generate_content" || provider_api_format == "gemini:embedding"
+    {
         path_params.insert(
             "action",
             if provider_api_format == "gemini:embedding" {
@@ -445,6 +451,10 @@ fn build_provider_rerank_v1_url(upstream_base_url: &str, query: Option<&str>) ->
     build_provider_api_root_url(upstream_base_url, "/rerank", query)
 }
 
+fn build_gemini_interactions_url(upstream_base_url: &str, query: Option<&str>) -> Option<String> {
+    build_passthrough_path_url(upstream_base_url, "/v1/interactions", query, &["key"])
+}
+
 fn build_provider_api_root_url(
     upstream_base_url: &str,
     path: &str,
@@ -1116,6 +1126,76 @@ mod tests {
         );
     }
 
+    #[test]
+    fn gemini_interactions_request_url_uses_stable_v1_endpoint() {
+        let gemini = sample_transport(
+            "gemini",
+            "gemini:interactions",
+            "https://generativelanguage.googleapis.com",
+            None,
+        );
+        let versioned = sample_transport(
+            "gemini",
+            "gemini:interactions",
+            "https://generativelanguage.googleapis.com/v1",
+            None,
+        );
+
+        assert_eq!(
+            build_transport_request_url(
+                &gemini,
+                TransportRequestUrlParams {
+                    provider_api_format: "gemini:interactions",
+                    mapped_model: Some("gemini-3.5-flash"),
+                    upstream_is_stream: false,
+                    request_query: Some("key=client-key&trace=1"),
+                    kiro_api_region: None,
+                },
+            )
+            .as_deref(),
+            Some("https://generativelanguage.googleapis.com/v1/interactions?trace=1")
+        );
+        assert_eq!(
+            build_transport_request_url(
+                &versioned,
+                TransportRequestUrlParams {
+                    provider_api_format: "gemini:interactions",
+                    mapped_model: Some("gemini-3.5-flash"),
+                    upstream_is_stream: true,
+                    request_query: Some("key=client-key&trace=2"),
+                    kiro_api_region: None,
+                },
+            )
+            .as_deref(),
+            Some("https://generativelanguage.googleapis.com/v1/interactions?trace=2")
+        );
+    }
+
+    #[test]
+    fn antigravity_hook_is_limited_to_generate_content() {
+        let transport = sample_transport(
+            "antigravity",
+            "gemini:interactions",
+            "https://daily-cloudcode-pa.googleapis.com",
+            None,
+        );
+
+        assert_eq!(
+            build_transport_request_url(
+                &transport,
+                TransportRequestUrlParams {
+                    provider_api_format: "gemini:interactions",
+                    mapped_model: Some("gemini-3.5-flash"),
+                    upstream_is_stream: false,
+                    request_query: Some("key=client-key"),
+                    kiro_api_region: None,
+                },
+            )
+            .as_deref(),
+            Some("https://daily-cloudcode-pa.googleapis.com/v1/interactions")
+        );
+    }
+
     #[test]
     fn embedding_request_url_preserves_google_openai_compat_roots() {
         let developer_api_openai = sample_transport(
diff --git a/crates/aether-provider-transport/src/same_format_provider/mod.rs b/crates/aether-provider-transport/src/same_format_provider/mod.rs
index 5faaa9032..d65a24519 100644
--- a/crates/aether-provider-transport/src/same_format_provider/mod.rs
+++ b/crates/aether-provider-transport/src/same_format_provider/mod.rs
@@ -265,13 +265,39 @@ fn build_same_format_provider_request_body_inner(
             }
         }
         SameFormatProviderFamily::Gemini => {
-            if provider_request_body.remove("model").is_some() {
-                record_compatibility_edit(
-                    &mut compatibility_edits,
-                    "model",
-                    SameFormatProviderCompatibilityEditAction::RuntimeRewrite,
-                    "removed top-level model because Gemini model is carried by the upstream URL",
+            if aether_ai_formats::api_format_alias_matches(
+                input.provider_api_format,
+                "gemini:interactions",
+            ) {
+                let rewrite_field = if provider_request_body.contains_key("model") {
+                    "model"
+                } else if provider_request_body.contains_key("agent") {
+                    "agent"
+                } else {
+                    "model"
+                };
+                let previous_value = provider_request_body.get(rewrite_field).cloned();
+                provider_request_body.insert(
+                    rewrite_field.to_string(),
+                    Value::String(input.mapped_model.to_string()),
                 );
+                if previous_value != Some(Value::String(input.mapped_model.to_string())) {
+                    record_compatibility_edit(
+                        &mut compatibility_edits,
+                        rewrite_field,
+                        SameFormatProviderCompatibilityEditAction::RuntimeRewrite,
+                        "rewrote Gemini Interactions routing field to mapped upstream target",
+                    );
+                }
+            } else {
+                if provider_request_body.remove("model").is_some() {
+                    record_compatibility_edit(
+                        &mut compatibility_edits,
+                        "model",
+                        SameFormatProviderCompatibilityEditAction::RuntimeRewrite,
+                        "removed top-level model because Gemini model is carried by the upstream URL",
+                    );
+                }
             }
         }
     }
@@ -577,6 +603,7 @@ pub fn same_format_provider_transport_unsupported_reason_for_trace(
             "openai:responses:compact" => "openai:responses:compact",
             "claude:messages" => "claude:messages",
             "gemini:generate_content" => "gemini:generate_content",
+            "gemini:interactions" => "gemini:interactions",
             _ => return Some("transport_api_format_unsupported"),
         };
     let behavior = classify_same_format_provider_request_behavior(
@@ -1210,6 +1237,62 @@ mod tests {
         assert!(body.get("stream").is_none());
     }
 
+    #[test]
+    fn same_format_gemini_interactions_body_keeps_body_routing_target() {
+        let body = build_same_format_provider_request_body(SameFormatProviderRequestBodyInput {
+            body_json: &json!({
+                "model": "client-model",
+                "input": [{"role": "user", "content": "hello"}],
+                "stream": true
+            }),
+            mapped_model: "gemini-3.5-flash",
+            client_api_format: "gemini:interactions",
+            provider_api_format: "gemini:interactions",
+            source_model: Some("client-model"),
+            family: SameFormatProviderFamily::Gemini,
+            body_rules: None,
+            request_headers: None,
+            upstream_is_stream: true,
+            force_body_stream_field: false,
+            kiro_auth_config: None,
+            is_claude_code: false,
+            enable_model_directives: false,
+        })
+        .expect("body should build");
+
+        assert_eq!(body.get("model"), Some(&json!("gemini-3.5-flash")));
+        assert_eq!(body.get("stream"), Some(&json!(true)));
+    }
+
+    #[test]
+    fn same_format_gemini_interactions_body_rewrites_agent_target() {
+        let body = build_same_format_provider_request_body(SameFormatProviderRequestBodyInput {
+            body_json: &json!({
+                "agent": "antigravity-preview-05-2026",
+                "input": "hello"
+            }),
+            mapped_model: "antigravity-preview-05-2026",
+            client_api_format: "gemini:interactions",
+            provider_api_format: "gemini:interactions",
+            source_model: None,
+            family: SameFormatProviderFamily::Gemini,
+            body_rules: None,
+            request_headers: None,
+            upstream_is_stream: false,
+            force_body_stream_field: false,
+            kiro_auth_config: None,
+            is_claude_code: false,
+            enable_model_directives: false,
+        })
+        .expect("body should build");
+
+        assert_eq!(
+            body.get("agent"),
+            Some(&json!("antigravity-preview-05-2026"))
+        );
+        assert!(body.get("model").is_none());
+    }
+
     #[test]
     fn same_format_gemini_body_strips_function_response_id_for_upstream() {
         let body = build_same_format_provider_request_body(SameFormatProviderRequestBodyInput {
diff --git a/frontend/src/api/endpoints/types/__tests__/api-format.spec.ts b/frontend/src/api/endpoints/types/__tests__/api-format.spec.ts
index 8dbe52f81..44122b355 100644
--- a/frontend/src/api/endpoints/types/__tests__/api-format.spec.ts
+++ b/frontend/src/api/endpoints/types/__tests__/api-format.spec.ts
@@ -17,6 +17,7 @@ describe('api format display helpers', () => {
     expect(normalizeApiFormatAlias('GEMINI_GENERATE_CONTENT')).toBe(API_FORMATS.GEMINI_GENERATE_CONTENT)
     expect(normalizeApiFormatAlias('OPENAI_EMBEDDING')).toBe(API_FORMATS.OPENAI_EMBEDDING)
     expect(normalizeApiFormatAlias('OPENAI_RERANK')).toBe(API_FORMATS.OPENAI_RERANK)
+    expect(normalizeApiFormatAlias('GEMINI_INTERACTIONS')).toBe(API_FORMATS.GEMINI_INTERACTIONS)
     expect(normalizeApiFormatAlias('GEMINI_EMBEDDING')).toBe(API_FORMATS.GEMINI_EMBEDDING)
     expect(normalizeApiFormatAlias('JINA_EMBEDDING')).toBe(API_FORMATS.JINA_EMBEDDING)
     expect(normalizeApiFormatAlias('JINA_RERANK')).toBe(API_FORMATS.JINA_RERANK)
@@ -33,6 +34,8 @@ describe('api format display helpers', () => {
   })
 
   it('formats embedding api format ids distinctly from chat formats', () => {
+    expect(formatApiFormat(API_FORMATS.GEMINI_INTERACTIONS)).toBe('Gemini Interactions')
+    expect(formatApiFormatShort(API_FORMATS.GEMINI_INTERACTIONS)).toBe('GI')
     expect(formatApiFormat(API_FORMATS.OPENAI_EMBEDDING)).toBe('OpenAI Embedding')
     expect(formatApiFormat(API_FORMATS.GEMINI_EMBEDDING)).toBe('Gemini Embedding')
     expect(formatApiFormat(API_FORMATS.JINA_EMBEDDING)).toBe('Jina Embedding')
@@ -73,6 +76,7 @@ describe('api format display helpers', () => {
       API_FORMATS.OPENAI_RESPONSES,
       API_FORMATS.OPENAI_EMBEDDING,
       API_FORMATS.OPENAI_RERANK,
+      API_FORMATS.GEMINI_INTERACTIONS,
       API_FORMATS.GEMINI_EMBEDDING,
       API_FORMATS.JINA_EMBEDDING,
       API_FORMATS.JINA_RERANK,
@@ -82,6 +86,7 @@ describe('api format display helpers', () => {
       API_FORMATS.OPENAI_RESPONSES,
       API_FORMATS.OPENAI_EMBEDDING,
       API_FORMATS.OPENAI_RERANK,
+      API_FORMATS.GEMINI_INTERACTIONS,
       API_FORMATS.GEMINI_EMBEDDING,
       API_FORMATS.JINA_EMBEDDING,
       API_FORMATS.JINA_RERANK,
@@ -97,12 +102,14 @@ describe('api format display helpers', () => {
       API_FORMATS.OPENAI_EMBEDDING,
       API_FORMATS.OPENAI_RERANK,
       API_FORMATS.GEMINI_GENERATE_CONTENT,
+      API_FORMATS.GEMINI_INTERACTIONS,
       API_FORMATS.OPENAI,
     ])).toEqual([
       API_FORMATS.OPENAI,
       API_FORMATS.OPENAI_EMBEDDING,
       API_FORMATS.OPENAI_RERANK,
       API_FORMATS.GEMINI_GENERATE_CONTENT,
+      API_FORMATS.GEMINI_INTERACTIONS,
       API_FORMATS.GEMINI_EMBEDDING,
     ])
   })
diff --git a/frontend/src/api/endpoints/types/api-format.ts b/frontend/src/api/endpoints/types/api-format.ts
index e947e982b..bae97e933 100644
--- a/frontend/src/api/endpoints/types/api-format.ts
+++ b/frontend/src/api/endpoints/types/api-format.ts
@@ -12,6 +12,7 @@ export const API_FORMATS = {
   OPENAI_RERANK: 'openai:rerank',
   GEMINI: 'gemini:generate_content',
   GEMINI_GENERATE_CONTENT: 'gemini:generate_content',
+  GEMINI_INTERACTIONS: 'gemini:interactions',
   GEMINI_VIDEO: 'gemini:video',
   GEMINI_FILES: 'gemini:files',
   GEMINI_EMBEDDING: 'gemini:embedding',
@@ -34,6 +35,7 @@ export const API_FORMAT_LABELS: Record<string, string> = {
   [API_FORMATS.OPENAI_EMBEDDING]: 'OpenAI Embedding',
   [API_FORMATS.OPENAI_RERANK]: 'OpenAI Rerank',
   [API_FORMATS.GEMINI_GENERATE_CONTENT]: 'Gemini Generate Content',
+  [API_FORMATS.GEMINI_INTERACTIONS]: 'Gemini Interactions',
   [API_FORMATS.GEMINI_VIDEO]: 'Gemini Video',
   [API_FORMATS.GEMINI_FILES]: 'Gemini Files',
   [API_FORMATS.GEMINI_EMBEDDING]: 'Gemini Embedding',
@@ -52,6 +54,7 @@ export const API_FORMAT_LABELS: Record<string, string> = {
   OPENAI_RERANK: 'OpenAI Rerank',
   GEMINI: 'Gemini Generate Content',
   GEMINI_GENERATE_CONTENT: 'Gemini Generate Content',
+  GEMINI_INTERACTIONS: 'Gemini Interactions',
   GEMINI_VIDEO: 'Gemini Video',
   GEMINI_FILES: 'Gemini Files',
   GEMINI_EMBEDDING: 'Gemini Embedding',
@@ -72,6 +75,7 @@ export const API_FORMAT_SHORT: Record<string, string> = {
   [API_FORMATS.OPENAI_RERANK]: 'ORR',
   [API_FORMATS.CLAUDE_MESSAGES]: 'CM',
   [API_FORMATS.GEMINI_GENERATE_CONTENT]: 'G',
+  [API_FORMATS.GEMINI_INTERACTIONS]: 'GI',
   [API_FORMATS.GEMINI_VIDEO]: 'GV',
   [API_FORMATS.GEMINI_FILES]: 'GF',
   [API_FORMATS.GEMINI_EMBEDDING]: 'GE',
@@ -90,6 +94,7 @@ export const API_FORMAT_SHORT: Record<string, string> = {
   CLAUDE_MESSAGES: 'CM',
   GEMINI: 'G',
   GEMINI_GENERATE_CONTENT: 'G',
+  GEMINI_INTERACTIONS: 'GI',
   GEMINI_VIDEO: 'GV',
   GEMINI_FILES: 'GF',
   GEMINI_EMBEDDING: 'GE',
@@ -110,6 +115,7 @@ export const API_FORMAT_ORDER: string[] = [
   API_FORMATS.OPENAI_VIDEO,
   API_FORMATS.CLAUDE_MESSAGES,
   API_FORMATS.GEMINI_GENERATE_CONTENT,
+  API_FORMATS.GEMINI_INTERACTIONS,
   API_FORMATS.GEMINI_EMBEDDING,
   API_FORMATS.GEMINI_VIDEO,
   API_FORMATS.GEMINI_FILES,
@@ -136,6 +142,7 @@ export const API_FORMAT_KIND_LABELS: Record<string, string> = {
   'responses:compact': 'Responses Compact',
   messages: 'Messages',
   generate_content: 'Generate Content',
+  interactions: 'Interactions',
   image: 'Image',
   video: 'Video',
   files: 'Files',
@@ -178,6 +185,8 @@ export function normalizeApiFormatAlias(format: string | null | undefined): stri
     case 'GEMINI':
     case 'GEMINI_GENERATE_CONTENT':
       return API_FORMATS.GEMINI_GENERATE_CONTENT
+    case 'GEMINI_INTERACTIONS':
+      return API_FORMATS.GEMINI_INTERACTIONS
     case 'GEMINI_VIDEO':
       return API_FORMATS.GEMINI_VIDEO
     case 'GEMINI_FILES':
diff --git a/frontend/src/api/endpoints/types/provider.ts b/frontend/src/api/endpoints/types/provider.ts
index 793aa9c75..d0580dcea 100644
--- a/frontend/src/api/endpoints/types/provider.ts
+++ b/frontend/src/api/endpoints/types/provider.ts
@@ -344,9 +344,16 @@ export interface CodexUpstreamMetadata {
 }
 
 export interface AntigravityModelQuota {
-  remaining_fraction: number  // 剩余比例 (0.0-1.0)
-  used_percent: number  // 已用百分比 (0.0-100.0)
-  reset_time?: string  // RFC3339
+  remaining_fraction?: number | string | null  // 剩余比例 (0.0-1.0)
+  used_percent?: number | string | null  // 已用百分比 (0.0-100.0)
+  remaining?: number | string | null
+  total?: number | string | null
+  reset_time?: string | null  // RFC3339
+  reset_at?: number | string | null
+  display_name?: string | null
+  model_id?: string | null
+  token_type?: string | null
+  is_exhausted?: boolean | null
 }
 
 export interface AntigravityUpstreamMetadata {
diff --git a/frontend/src/features/providers/components/AntigravityQuotaDialog.vue b/frontend/src/features/providers/components/AntigravityQuotaDialog.vue
index 34413f093..b180d67d8 100644
--- a/frontend/src/features/providers/components/AntigravityQuotaDialog.vue
+++ b/frontend/src/features/providers/components/AntigravityQuotaDialog.vue
@@ -34,9 +34,10 @@
           <DropdownMenuItem
             v-for="item in items"
             :key="item.model"
+            :title="item.model"
             @select="handleTestModel(item.model)"
           >
-            {{ item.model }}
+            <span class="truncate">{{ item.label }}</span>
           </DropdownMenuItem>
         </DropdownMenuContent>
       </DropdownMenu>
@@ -52,12 +53,14 @@
           :key="item.model"
         >
           <div class="flex items-center justify-between text-[10px] mb-0.5">
-            <span
-              class="text-muted-foreground truncate mr-2 min-w-0 flex-1"
-              :title="item.model"
-            >
-              {{ item.label }}
-            </span>
+            <div class="min-w-0 flex-1 mr-2">
+              <div
+                class="text-muted-foreground truncate"
+                :title="item.model"
+              >
+                {{ item.label }}
+              </div>
+            </div>
             <span :class="getQuotaRemainingClass(item.usedPercent)">
               {{ item.remainingPercent.toFixed(1) }}%
             </span>
@@ -115,6 +118,11 @@ import { testModel } from '@/api/endpoints/providers'
 import type { UpstreamMetadata, QuotaStatusSnapshot, QuotaWindowSnapshot } from '@/api/endpoints/types'
 import { useToast } from '@/composables/useToast'
 import { parseApiError } from '@/utils/errorParser'
+import {
+  compareAntigravityQuotaItems,
+  dedupeAntigravityQuotaItemsByLabel,
+  resolveAntigravityQuotaLabel,
+} from '@/features/providers/utils/antigravityQuota'
 
 const props = defineProps<{
   open: boolean
@@ -165,6 +173,25 @@ function getQuotaWindowLiveResetSeconds(
   return null
 }
 
+function coercePercent(value: unknown): number | null {
+  const numericValue = Number(value)
+  if (!Number.isFinite(numericValue)) return null
+  return Math.min(Math.max(numericValue, 0), 100)
+}
+
+function coerceRemainingFraction(value: unknown): number | null {
+  const numericValue = Number(value)
+  if (!Number.isFinite(numericValue)) return null
+  return Math.min(Math.max(numericValue, 0), 1)
+}
+
+function secondsUntilUnixReset(resetAt: unknown): number | null {
+  const numericResetAt = Number(resetAt)
+  if (!Number.isFinite(numericResetAt) || numericResetAt <= 0) return null
+  const now = Math.floor(Date.now() / 1000)
+  return Math.max(Math.floor(numericResetAt - now), 0)
+}
+
 function buildItemsFromQuotaSnapshot(quota: QuotaStatusSnapshot | null | undefined): QuotaItem[] {
   if (!quota) return []
 
@@ -175,6 +202,7 @@ function buildItemsFromQuotaSnapshot(quota: QuotaStatusSnapshot | null | undefin
     ? quota.windows.filter(window => String(window?.scope || '').trim().toLowerCase() === 'model')
     : []
   if (windows.length === 0) return []
+  const opaqueDisplayIndex = { value: 1 }
 
   const items = windows
     .map((window) => {
@@ -196,7 +224,7 @@ function buildItemsFromQuotaSnapshot(quota: QuotaStatusSnapshot | null | undefin
 
       return {
         model,
-        label: String(window.label || window.model || model),
+        label: resolveAntigravityQuotaLabel(model, window.label || window.model, opaqueDisplayIndex),
         usedPercent,
         remainingPercent,
         resetSeconds: getQuotaWindowLiveResetSeconds(quota, window),
@@ -204,8 +232,8 @@ function buildItemsFromQuotaSnapshot(quota: QuotaStatusSnapshot | null | undefin
     })
     .filter((item): item is QuotaItem => item !== null)
 
-  items.sort((a, b) => (b.usedPercent - a.usedPercent) || a.model.localeCompare(b.model))
-  return items
+  items.sort(compareAntigravityQuotaItems)
+  return dedupeAntigravityQuotaItemsByLabel(items)
 }
 
 const items = computed<QuotaItem[]>(() => {
@@ -218,26 +246,26 @@ const items = computed<QuotaItem[]>(() => {
   if (!quotaByModel || typeof quotaByModel !== 'object') return []
 
   const result: QuotaItem[] = []
+  const opaqueDisplayIndex = { value: 1 }
   for (const [model, rawInfo] of Object.entries(quotaByModel)) {
     if (!model) continue
     const info = (rawInfo || {}) as Record<string, unknown>
 
-    let usedPercent = Number(info['used_percent'])
-    if (!Number.isFinite(usedPercent)) {
-      const remainingFraction = Number(info['remaining_fraction'])
-      if (Number.isFinite(remainingFraction)) {
+    let usedPercent = coercePercent(info['used_percent'])
+    if (usedPercent === null) {
+      const remainingFraction = coerceRemainingFraction(info['remaining_fraction'])
+      if (remainingFraction !== null) {
         usedPercent = (1 - remainingFraction) * 100
       } else {
         continue
       }
     }
 
-    if (usedPercent < 0) usedPercent = 0
-    if (usedPercent > 100) usedPercent = 100
+    usedPercent = coercePercent(usedPercent) ?? 0
 
     const remainingPercent = Math.max(100 - usedPercent, 0)
 
-    let resetSeconds: number | null = null
+    let resetSeconds = secondsUntilUnixReset(info['reset_at'])
     const resetTime = info['reset_time']
     if (typeof resetTime === 'string' && resetTime.trim()) {
       const ts = Date.parse(resetTime.trim())
@@ -247,11 +275,17 @@ const items = computed<QuotaItem[]>(() => {
       }
     }
 
-    result.push({ model, label: model, usedPercent, remainingPercent, resetSeconds })
+    result.push({
+      model,
+      label: resolveAntigravityQuotaLabel(model, info['display_name'], opaqueDisplayIndex),
+      usedPercent,
+      remainingPercent,
+      resetSeconds,
+    })
   }
 
-  result.sort((a, b) => (b.usedPercent - a.usedPercent) || a.model.localeCompare(b.model))
-  return result
+  result.sort(compareAntigravityQuotaItems)
+  return dedupeAntigravityQuotaItemsByLabel(result)
 })
 
 async function handleTestModel(modelName: string) {
diff --git a/frontend/src/features/providers/components/ProviderDetailDrawer.vue b/frontend/src/features/providers/components/ProviderDetailDrawer.vue
index 2f1496ceb..aaa318121 100644
--- a/frontend/src/features/providers/components/ProviderDetailDrawer.vue
+++ b/frontend/src/features/providers/components/ProviderDetailDrawer.vue
@@ -361,31 +361,39 @@
                         />
                         <div class="grid grid-cols-2 gap-3">
                           <ProviderQuotaProgressRow
-                            v-for="group in getAntigravityQuotaSummaryForKey(key)"
-                            :key="group.key"
-                            :label="group.label"
-                            :used-percent="group.usedPercent"
-                            :remaining-percent="group.remainingPercent"
-                            :meter-class="getQuotaRemainingClass(group.usedPercent)"
-                            :bar-class="getQuotaRemainingBarColor(group.usedPercent)"
+                            v-for="item in getAntigravityQuotaPreviewForKey(key)"
+                            :key="item.model"
+                            :label="item.label"
+                            :title="item.model"
+                            :used-percent="item.usedPercent"
+                            :remaining-percent="item.remainingPercent"
+                            :meter-class="getQuotaRemainingClass(item.usedPercent)"
+                            :bar-class="getQuotaRemainingBarColor(item.usedPercent)"
                           >
                             <template #footer>
-                              <div
-                                v-if="group.resetSeconds !== null || group.usedPercent > 0"
-                                class="text-[9px] text-muted-foreground/70 mt-0.5"
-                              >
-                                <template v-if="group.resetSeconds !== null && group.resetSeconds > 0">
-                                  {{ formatResetTime(group.resetSeconds) }}{{ legacyT('后重置') }}
-                                </template>
-                                <template v-else-if="group.resetSeconds !== null && group.resetSeconds <= 0">
-                                  {{ legacyT('已重置') }}
-                                </template>
-                                <template v-else>
-                                  {{ legacyT('重置时间未知') }}
-                                </template>
+                              <div class="mt-0.5 space-y-0.5">
+                                <div
+                                  v-if="item.resetSeconds !== null"
+                                  class="text-[9px] text-muted-foreground/70"
+                                >
+                                  <template v-if="item.resetSeconds !== null && item.resetSeconds > 0">
+                                    {{ formatResetTime(item.resetSeconds) }}{{ legacyT('后重置') }}
+                                  </template>
+                                  <template v-else-if="item.resetSeconds !== null && item.resetSeconds <= 0">
+                                    {{ legacyT('已重置') }}
+                                  </template>
+                                </div>
                               </div>
                             </template>
                           </ProviderQuotaProgressRow>
+                          <button
+                            v-if="getAntigravityQuotaHiddenCountForKey(key) > 0"
+                            type="button"
+                            class="col-span-2 text-left text-[10px] text-muted-foreground hover:text-foreground transition-colors"
+                            @click="openAntigravityQuotaDialog(key)"
+                          >
+                            {{ legacyT('另有') }} {{ getAntigravityQuotaHiddenCountForKey(key) }} {{ legacyT('个模型，查看全部') }}
+                          </button>
                         </div>
                       </template>
                     </div>
@@ -949,6 +957,11 @@ import ProviderMonthlyQuotaCard from '@/features/providers/components/ProviderMo
 import ProviderQuotaProgressRow from '@/features/providers/components/ProviderQuotaProgressRow.vue'
 import ProviderQuotaSectionHeader from '@/features/providers/components/ProviderQuotaSectionHeader.vue'
 import { useProxyNodesStore } from '@/stores/proxy-nodes'
+import {
+  compareAntigravityQuotaItems,
+  dedupeAntigravityQuotaItemsByLabel,
+  resolveAntigravityQuotaLabel,
+} from '@/features/providers/utils/antigravityQuota'
 import {
   deleteEndpointKey,
   recoverKeyHealth,
@@ -3348,53 +3361,72 @@ function secondsUntilReset(resetTime: string): number | null {
   return diff > 0 ? diff : 0
 }
 
+function secondsUntilUnixReset(resetAt: number | string | null | undefined): number | null {
+  const numericResetAt = Number(resetAt)
+  if (!Number.isFinite(numericResetAt) || numericResetAt <= 0) return null
+  const now = Math.floor(Date.now() / 1000)
+  return Math.max(Math.floor(numericResetAt - now), 0)
+}
+
+function coerceAntigravityPercent(value: number | string | null | undefined): number | undefined {
+  const numericValue = Number(value)
+  if (!Number.isFinite(numericValue)) return undefined
+  return Math.min(Math.max(numericValue, 0), 100)
+}
+
+function coerceAntigravityRemainingFraction(value: number | string | null | undefined): number | undefined {
+  const numericValue = Number(value)
+  if (!Number.isFinite(numericValue)) return undefined
+  return Math.min(Math.max(numericValue, 0), 1)
+}
+
 function getAntigravityQuotaItems(metadata: UpstreamMetadata | null | undefined): AntigravityQuotaItem[] {
   const quotaByModel = metadata?.antigravity?.quota_by_model
   if (!quotaByModel || typeof quotaByModel !== 'object') return []
 
   const items: AntigravityQuotaItem[] = []
+  const opaqueDisplayIndex = { value: 1 }
   for (const [model, rawInfo] of Object.entries(quotaByModel)) {
     if (!model) continue
     const info: Partial<AntigravityModelQuota> = rawInfo || {}
 
-    let usedPercent = Number(info.used_percent)
-    if (!Number.isFinite(usedPercent)) {
-      const remainingFraction = Number(info.remaining_fraction)
-      if (Number.isFinite(remainingFraction)) {
+    let usedPercent = coerceAntigravityPercent(info.used_percent)
+    if (usedPercent === undefined) {
+      const remainingFraction = coerceAntigravityRemainingFraction(info.remaining_fraction)
+      if (remainingFraction !== undefined) {
         usedPercent = (1 - remainingFraction) * 100
       } else {
         continue
       }
     }
 
-    if (usedPercent < 0) usedPercent = 0
-    if (usedPercent > 100) usedPercent = 100
+    usedPercent = coerceAntigravityPercent(usedPercent) ?? 0
 
     const remainingPercent = Math.max(100 - usedPercent, 0)
 
-    let resetSeconds: number | null = null
+    let resetSeconds = secondsUntilUnixReset(info.reset_at)
     if (typeof info.reset_time === 'string' && info.reset_time.trim()) {
-      resetSeconds = secondsUntilReset(info.reset_time.trim())
+      resetSeconds = secondsUntilReset(info.reset_time.trim()) ?? resetSeconds
     }
 
     items.push({
       model,
-      label: model,
+      label: resolveAntigravityQuotaLabel(model, info.display_name, opaqueDisplayIndex),
       usedPercent,
       remainingPercent,
       resetSeconds,
     })
   }
 
-  // 按“最紧张”（已用最多）优先排序，便于快速定位额度风险；完整列表通过滚动展示
-  items.sort((a, b) => (b.usedPercent - a.usedPercent) || a.model.localeCompare(b.model))
-  return items
+  items.sort(compareAntigravityQuotaItems)
+  return dedupeAntigravityQuotaItemsByLabel(items)
 }
 
 function getAntigravityQuotaItemsFromSnapshot(key: EndpointAPIKey): AntigravityQuotaItem[] {
   const quota = getQuotaSnapshotForProvider(key, 'antigravity')
   const windows = getQuotaWindowByScope(quota, 'model')
   if (!quota || windows.length === 0) return []
+  const opaqueDisplayIndex = { value: 1 }
 
   const items = windows
     .map((window) => {
@@ -3418,7 +3450,11 @@ function getAntigravityQuotaItemsFromSnapshot(key: EndpointAPIKey): AntigravityQ
 
       return {
         model,
-        label: String(window.label || window.model || model),
+        label: resolveAntigravityQuotaLabel(
+          model,
+          window.label || window.model,
+          opaqueDisplayIndex,
+        ),
         usedPercent: normalizedUsedPercent,
         remainingPercent: normalizedRemainingPercent,
         resetSeconds: getQuotaWindowLiveResetSeconds(quota, window),
@@ -3426,124 +3462,24 @@ function getAntigravityQuotaItemsFromSnapshot(key: EndpointAPIKey): AntigravityQ
     })
     .filter((item): item is AntigravityQuotaItem => item !== null)
 
-  items.sort((a, b) => (b.usedPercent - a.usedPercent) || a.model.localeCompare(b.model))
-  return items
+  items.sort(compareAntigravityQuotaItems)
+  return dedupeAntigravityQuotaItemsByLabel(items)
 }
 
-// Antigravity 配额分组定义（按匹配优先级排列，具体规则在前）
-interface AntigravityQuotaGroup {
-  key: string
-  label: string
-  match: (model: string) => boolean
-}
+const ANTIGRAVITY_QUOTA_PREVIEW_LIMIT = 6
 
-const ANTIGRAVITY_QUOTA_GROUPS: AntigravityQuotaGroup[] = [
-  { key: 'claude', label: 'Claude', match: m => m.includes('claude') },
-  { key: 'gemini-2.5', label: 'Gemini 2.5', match: m => m.includes('gemini-2.5') || m.includes('gemini-2-5') },
-  { key: 'gemini-3', label: 'Gemini 3', match: m => m.includes('gemini-3') && !m.includes('image') },
-  { key: 'gemini-3-image', label: 'Gemini 3 Image', match: m => m.includes('gemini-3') && m.includes('image') },
-]
-
-interface AntigravityQuotaSummaryItem {
-  key: string
-  label: string
-  usedPercent: number       // 组内最高已用百分比（最紧张）
-  remainingPercent: number  // 100 - usedPercent
-  resetSeconds: number | null
-}
-
-function getAntigravityQuotaSummary(metadata: UpstreamMetadata | null | undefined): AntigravityQuotaSummaryItem[] {
-  const items = getAntigravityQuotaItems(metadata)
-  if (!items.length) return []
-
-  // 将每个模型归入分组
-  const groupMap = new Map<string, { label: string, maxUsed: number, resetSeconds: number | null }>()
-
-  for (const item of items) {
-    const model = item.model.toLowerCase()
-    const group = ANTIGRAVITY_QUOTA_GROUPS.find(g => g.match(model))
-    if (!group) continue
-
-    const existing = groupMap.get(group.key)
-    if (!existing) {
-      groupMap.set(group.key, {
-        label: group.label,
-        maxUsed: item.usedPercent,
-        resetSeconds: item.resetSeconds,
-      })
-    } else {
-      if (item.usedPercent > existing.maxUsed) {
-        existing.maxUsed = item.usedPercent
-      }
-      if (existing.resetSeconds === null) {
-        existing.resetSeconds = item.resetSeconds
-      } else if (item.resetSeconds !== null && item.resetSeconds < existing.resetSeconds) {
-        existing.resetSeconds = item.resetSeconds
-      }
-    }
-  }
-
-  // 按 ANTIGRAVITY_QUOTA_GROUPS 定义的顺序输出
-  const result: AntigravityQuotaSummaryItem[] = []
-  for (const group of ANTIGRAVITY_QUOTA_GROUPS) {
-    const data = groupMap.get(group.key)
-    if (!data) continue
-    result.push({
-      key: group.key,
-      label: data.label,
-      usedPercent: data.maxUsed,
-      remainingPercent: Math.max(100 - data.maxUsed, 0),
-      resetSeconds: data.resetSeconds,
-    })
-  }
-  return result
-}
-
-function getAntigravityQuotaSummaryForKey(key: EndpointAPIKey): AntigravityQuotaSummaryItem[] {
+function getAntigravityQuotaItemsForKey(key: EndpointAPIKey): AntigravityQuotaItem[] {
   const snapshotItems = getAntigravityQuotaItemsFromSnapshot(key)
-  if (snapshotItems.length > 0) {
-    const groupMap = new Map<string, { label: string, maxUsed: number, resetSeconds: number | null }>()
+  if (snapshotItems.length > 0) return snapshotItems
+  return getAntigravityQuotaItems(key.upstream_metadata)
+}
 
-    for (const item of snapshotItems) {
-      const model = item.model.toLowerCase()
-      const group = ANTIGRAVITY_QUOTA_GROUPS.find(g => g.match(model))
-      if (!group) continue
+function getAntigravityQuotaPreviewForKey(key: EndpointAPIKey): AntigravityQuotaItem[] {
+  return getAntigravityQuotaItemsForKey(key).slice(0, ANTIGRAVITY_QUOTA_PREVIEW_LIMIT)
+}
 
-      const existing = groupMap.get(group.key)
-      if (!existing) {
-        groupMap.set(group.key, {
-          label: group.label,
-          maxUsed: item.usedPercent,
-          resetSeconds: item.resetSeconds,
-        })
-      } else {
-        if (item.usedPercent > existing.maxUsed) {
-          existing.maxUsed = item.usedPercent
-        }
-        if (existing.resetSeconds === null) {
-          existing.resetSeconds = item.resetSeconds
-        } else if (item.resetSeconds !== null && item.resetSeconds < existing.resetSeconds) {
-          existing.resetSeconds = item.resetSeconds
-        }
-      }
-    }
-
-    const result: AntigravityQuotaSummaryItem[] = []
-    for (const group of ANTIGRAVITY_QUOTA_GROUPS) {
-      const data = groupMap.get(group.key)
-      if (!data) continue
-      result.push({
-        key: group.key,
-        label: data.label,
-        usedPercent: data.maxUsed,
-        remainingPercent: Math.max(100 - data.maxUsed, 0),
-        resetSeconds: data.resetSeconds,
-      })
-    }
-    return result
-  }
-
-  return getAntigravityQuotaSummary(key.upstream_metadata)
+function getAntigravityQuotaHiddenCountForKey(key: EndpointAPIKey): number {
+  return Math.max(getAntigravityQuotaItemsForKey(key).length - ANTIGRAVITY_QUOTA_PREVIEW_LIMIT, 0)
 }
 
 function getResetCountdownText(
diff --git a/frontend/src/features/providers/components/__tests__/AntigravityQuotaDialog.spec.ts b/frontend/src/features/providers/components/__tests__/AntigravityQuotaDialog.spec.ts
new file mode 100644
index 000000000..2ad4a4616
--- /dev/null
+++ b/frontend/src/features/providers/components/__tests__/AntigravityQuotaDialog.spec.ts
@@ -0,0 +1,207 @@
+import { describe, expect, it, vi } from 'vitest'
+import { createApp, defineComponent, h } from 'vue'
+
+import AntigravityQuotaDialog from '@/features/providers/components/AntigravityQuotaDialog.vue'
+import type { UpstreamMetadata } from '@/api/endpoints/types'
+
+vi.mock('@/components/ui', async () => {
+  const { defineComponent, h } = await import('vue')
+
+  const passthrough = (name: string) => defineComponent({
+    name,
+    setup(_, { slots }) {
+      return () => h('div', [
+        slots.headerActions?.(),
+        slots.default?.(),
+        slots.footer?.(),
+      ])
+    },
+  })
+
+  return {
+    Dialog: passthrough('DialogStub'),
+    DropdownMenu: passthrough('DropdownMenuStub'),
+    DropdownMenuTrigger: passthrough('DropdownMenuTriggerStub'),
+    DropdownMenuContent: passthrough('DropdownMenuContentStub'),
+    DropdownMenuItem: defineComponent({
+      name: 'DropdownMenuItemStub',
+      emits: ['select'],
+      setup(_, { emit, slots }) {
+        return () => h('button', { type: 'button', onClick: () => emit('select') }, slots.default?.())
+      },
+    }),
+  }
+})
+
+vi.mock('@/components/ui/button.vue', async () => {
+  const { defineComponent, h } = await import('vue')
+
+  return {
+    default: defineComponent({
+      name: 'ButtonStub',
+      setup(_, { attrs, slots }) {
+        return () => h('button', { ...attrs, type: 'button' }, slots.default?.())
+      },
+    }),
+  }
+})
+
+vi.mock('lucide-vue-next', async () => {
+  const { defineComponent, h } = await import('vue')
+  const Icon = defineComponent({
+    name: 'IconStub',
+    setup() {
+      return () => h('span')
+    },
+  })
+
+  return {
+    BarChart3: Icon,
+    Loader2: Icon,
+    Play: Icon,
+  }
+})
+
+vi.mock('@/api/endpoints/providers', () => ({
+  testModel: vi.fn(),
+}))
+
+vi.mock('@/composables/useToast', () => ({
+  useToast: () => ({
+    error: vi.fn(),
+    success: vi.fn(),
+  }),
+}))
+
+vi.mock('@/utils/errorParser', () => ({
+  parseApiError: (value: unknown) => String(value),
+}))
+
+function mount(metadata: UpstreamMetadata) {
+  const root = document.createElement('div')
+  document.body.appendChild(root)
+
+  const app = createApp(defineComponent({
+    setup() {
+      return () => h(AntigravityQuotaDialog, {
+        open: true,
+        metadata,
+        keyName: 'Key-1',
+      })
+    },
+  }))
+  app.mount(root)
+
+  return {
+    root,
+    unmount: () => {
+      app.unmount()
+      root.remove()
+    },
+  }
+}
+
+describe('AntigravityQuotaDialog', () => {
+  it('renders opaque quota identifiers with concise visible labels', () => {
+    const rawIdentifier = 'RateLimitResetCredit_05cbb6eeeb9c81918e011d8300f9ebfb'
+    const { root, unmount } = mount({
+      antigravity: {
+        quota_by_model: {
+          [rawIdentifier]: {
+            display_name: rawIdentifier,
+            remaining_fraction: 0.25,
+            used_percent: 75,
+          },
+        },
+      },
+    })
+
+    expect(root.textContent).toContain('Key-1')
+    expect(root.textContent).not.toContain(rawIdentifier)
+    expect(root.textContent).toContain('25.0%')
+
+    unmount()
+  })
+
+  it('orders important Gemini and Claude quota rows before low-priority rows', () => {
+    const { root, unmount } = mount({
+      antigravity: {
+        quota_by_model: {
+          tab_flash_lite_preview: {
+            display_name: 'Tab Flash Lite Preview',
+            remaining_fraction: 0.01,
+            used_percent: 99,
+          },
+          'gemini-3-flash-agent': {
+            display_name: 'Gemini 3.5 Flash (High)',
+            remaining_fraction: 0.9,
+            used_percent: 10,
+          },
+          'gemini-pro-agent': {
+            display_name: 'gemini-pro-agent',
+            remaining_fraction: 0.95,
+            used_percent: 5,
+          },
+          'gemini-3.5-flash-low': {
+            display_name: 'Gemini 3.5 Flash (Medium)',
+            remaining_fraction: 0.8,
+            used_percent: 20,
+          },
+          'claude-opus-4-6-thinking': {
+            display_name: 'Claude Opus 4.6 (Thinking)',
+            remaining_fraction: 1,
+            used_percent: 0,
+          },
+          chat_20706: {
+            display_name: 'chat_20706',
+            remaining_fraction: 0,
+            used_percent: 100,
+          },
+        },
+      },
+    })
+    const text = root.textContent || ''
+
+    expect(text).not.toContain('gemini-pro-agent')
+    expect(text).not.toContain('claude-opus-4-6-thinking')
+    expect(text.indexOf('Claude Opus 4.6 (Thinking)')).toBeLessThan(text.indexOf('Gemini 3.1 Pro (High)'))
+    expect(text.indexOf('Gemini 3.1 Pro (High)')).toBeLessThan(text.indexOf('Gemini 3.5 Flash (High)'))
+    expect(text.indexOf('Gemini 3.5 Flash (High)')).toBeLessThan(text.indexOf('Gemini 3.5 Flash (Medium)'))
+    expect(text.indexOf('Gemini 3.5 Flash (Medium)')).toBeLessThan(text.indexOf('Tab Flash Lite Preview'))
+    expect(text.indexOf('Tab Flash Lite Preview')).toBeLessThan(text.indexOf('chat_20706'))
+
+    unmount()
+  })
+
+  it('renders one row for duplicate quota labels and keeps the preferred active bucket', () => {
+    const { root, unmount } = mount({
+      antigravity: {
+        quota_by_model: {
+          'gemini-3.1-pro-high': {
+            display_name: 'Gemini 3.1 Pro (High)',
+            remaining_fraction: 0.95,
+            used_percent: 5,
+          },
+          'gemini-pro-agent': {
+            display_name: 'Gemini 3.1 Pro (High)',
+            remaining_fraction: 0.4,
+            used_percent: 60,
+          },
+          'gemini-3-flash-agent': {
+            display_name: 'Gemini 3.5 Flash (High)',
+            remaining_fraction: 0.9,
+            used_percent: 10,
+          },
+        },
+      },
+    })
+    const text = root.textContent || ''
+
+    expect(text.match(/Gemini 3\.1 Pro \(High\)/g)).toHaveLength(1)
+    expect(text).toContain('40.0%')
+    expect(text).not.toContain('95.0%')
+    expect(text.indexOf('Gemini 3.1 Pro (High)')).toBeLessThan(text.indexOf('Gemini 3.5 Flash (High)'))
+
+    unmount()
+  })
+})
diff --git a/frontend/src/features/providers/components/__tests__/endpoint-default-paths.spec.ts b/frontend/src/features/providers/components/__tests__/endpoint-default-paths.spec.ts
index ecc416d60..183ebb5bd 100644
--- a/frontend/src/features/providers/components/__tests__/endpoint-default-paths.spec.ts
+++ b/frontend/src/features/providers/components/__tests__/endpoint-default-paths.spec.ts
@@ -5,6 +5,7 @@ import { getDefaultEndpointBaseUrl, getDefaultEndpointPath } from '../endpoint-d
 const apiFormats = [
   { value: 'openai:chat', default_path: '/v1/chat/completions' },
   { value: 'gemini:generate_content', default_path: '/v1beta/models/{model}:{action}' },
+  { value: 'gemini:interactions', default_path: '/v1/interactions' },
   { value: 'gemini:embedding', default_path: '/v1beta/models/{model}:embedContent' },
   { value: 'gemini:video', default_path: '/v1beta/models/{model}:predictLongRunning' },
   { value: 'openai:responses', default_path: '/v1/responses' },
@@ -31,6 +32,12 @@ describe('endpoint default paths', () => {
       apiFormats,
     })).toBe('/models/{model}:embedContent')
 
+    expect(getDefaultEndpointPath({
+      apiFormat: 'gemini:interactions',
+      providerType: 'custom',
+      apiFormats,
+    })).toBe('/interactions')
+
     expect(getDefaultEndpointPath({
       apiFormat: 'gemini:video',
       providerType: 'custom',
@@ -218,6 +225,11 @@ describe('endpoint default paths', () => {
       baseUrl: 'https://generativelanguage.googleapis.com',
     })).toBe('https://generativelanguage.googleapis.com/v1beta')
 
+    expect(getDefaultEndpointBaseUrl({
+      apiFormat: 'gemini:interactions',
+      baseUrl: 'https://generativelanguage.googleapis.com',
+    })).toBe('https://generativelanguage.googleapis.com/v1')
+
     expect(getDefaultEndpointBaseUrl({
       apiFormat: 'gemini:video',
       baseUrl: 'https://generativelanguage.googleapis.com',
diff --git a/frontend/src/features/providers/components/endpoint-default-paths.ts b/frontend/src/features/providers/components/endpoint-default-paths.ts
index e3f6087f7..0fcd451d0 100644
--- a/frontend/src/features/providers/components/endpoint-default-paths.ts
+++ b/frontend/src/features/providers/components/endpoint-default-paths.ts
@@ -98,11 +98,17 @@ function usesVersionedApiRootByDefault(apiFormat: string): boolean {
     || apiFormat === 'jina:rerank'
     || apiFormat === 'claude:messages'
     || apiFormat === 'gemini:generate_content'
+    || apiFormat === 'gemini:interactions'
     || apiFormat === 'gemini:embedding'
     || apiFormat === 'gemini:video'
 }
 
 function versionedApiRootSuffix(apiFormat: string): '/v1' | '/v1beta' {
+  if (
+    apiFormat === 'gemini:interactions'
+  ) {
+    return '/v1'
+  }
   if (
     apiFormat === 'gemini:generate_content'
     || apiFormat === 'gemini:embedding'
@@ -116,6 +122,7 @@ function versionedApiRootSuffix(apiFormat: string): '/v1' | '/v1beta' {
 function skipsVersionedApiRootDefault(apiFormat: string, baseUrl: string): boolean {
   if (
     apiFormat === 'gemini:generate_content'
+    || apiFormat === 'gemini:interactions'
     || apiFormat === 'gemini:embedding'
     || apiFormat === 'gemini:video'
   ) {
diff --git a/frontend/src/features/providers/components/provider-tabs/__tests__/model-test-request.spec.ts b/frontend/src/features/providers/components/provider-tabs/__tests__/model-test-request.spec.ts
index 9622695c9..afab2e00e 100644
--- a/frontend/src/features/providers/components/provider-tabs/__tests__/model-test-request.spec.ts
+++ b/frontend/src/features/providers/components/provider-tabs/__tests__/model-test-request.spec.ts
@@ -86,6 +86,17 @@ describe('buildDefaultModelTestRequestBody', () => {
     expect(body.messages).toBeUndefined()
   })
 
+  it('uses Gemini Interactions payloads for interaction endpoints', () => {
+    const body = JSON.parse(buildDefaultModelTestRequestBody('gemini-3.5-flash', 'gemini:interactions'))
+
+    expect(body).toEqual({
+      model: 'gemini-3.5-flash',
+      input: 'Hello! This is a test message.',
+      stream: true,
+    })
+    expect(body.messages).toBeUndefined()
+  })
+
   it('uses image generation tools for image models on OpenAI Responses endpoints', () => {
     const body = JSON.parse(buildDefaultModelTestRequestBody(
       'gpt-image-2',
diff --git a/frontend/src/features/providers/components/provider-tabs/model-test-request.ts b/frontend/src/features/providers/components/provider-tabs/model-test-request.ts
index 0e0b576fe..9b5fcb65f 100644
--- a/frontend/src/features/providers/components/provider-tabs/model-test-request.ts
+++ b/frontend/src/features/providers/components/provider-tabs/model-test-request.ts
@@ -196,6 +196,14 @@ export function buildDefaultModelTestRequestBody(
     }, null, 2)
   }
 
+  if (normalizedApiFormat === 'gemini:interactions') {
+    return JSON.stringify({
+      model: modelName,
+      input: DEFAULT_MODEL_TEST_MESSAGE,
+      stream: true,
+    }, null, 2)
+  }
+
   if (normalizedApiFormat === 'openai:responses' && modelSupportsImageGeneration(model)) {
     return JSON.stringify({
       model: modelName,
diff --git a/frontend/src/features/providers/composables/useEndpointStatus.ts b/frontend/src/features/providers/composables/useEndpointStatus.ts
index 87a5a229e..0dd65645e 100644
--- a/frontend/src/features/providers/composables/useEndpointStatus.ts
+++ b/frontend/src/features/providers/composables/useEndpointStatus.ts
@@ -12,6 +12,7 @@ const ENDPOINT_SORT_ORDER = [
   'openai:embedding',
   'openai:rerank',
   'gemini:generate_content',
+  'gemini:interactions',
   'gemini:embedding',
   'openai:video',
   'gemini:video',
diff --git a/frontend/src/features/providers/composables/useProviderFilters.ts b/frontend/src/features/providers/composables/useProviderFilters.ts
index 7da7511be..1c5bf711e 100644
--- a/frontend/src/features/providers/composables/useProviderFilters.ts
+++ b/frontend/src/features/providers/composables/useProviderFilters.ts
@@ -32,6 +32,7 @@ export function useProviderFilters(
     { value: 'openai:embedding', label: 'OpenAI Embedding' },
     { value: 'openai:rerank', label: 'OpenAI Rerank' },
     { value: 'gemini:generate_content', label: 'Gemini Generate Content' },
+    { value: 'gemini:interactions', label: 'Gemini Interactions' },
     { value: 'gemini:embedding', label: 'Gemini Embedding' },
     { value: 'jina:embedding', label: 'Jina Embedding' },
     { value: 'jina:rerank', label: 'Jina Rerank' },
diff --git a/frontend/src/features/providers/utils/__tests__/antigravityQuota.spec.ts b/frontend/src/features/providers/utils/__tests__/antigravityQuota.spec.ts
new file mode 100644
index 000000000..aa61e8891
--- /dev/null
+++ b/frontend/src/features/providers/utils/__tests__/antigravityQuota.spec.ts
@@ -0,0 +1,175 @@
+import { describe, expect, it } from 'vitest'
+
+import {
+  compareAntigravityQuotaItems,
+  dedupeAntigravityQuotaItemsByLabel,
+  resolveAntigravityQuotaLabel,
+} from '@/features/providers/utils/antigravityQuota'
+
+describe('antigravityQuota', () => {
+  it('uses canonical labels from model ids before stale upstream labels', () => {
+    const opaqueDisplayIndex = { value: 1 }
+
+    expect(
+      resolveAntigravityQuotaLabel(
+        'gemini-3-flash-agent',
+        'Gemini 3.5 Flash (High)',
+        opaqueDisplayIndex,
+      ),
+    ).toBe('Gemini 3.5 Flash (High)')
+    expect(
+      resolveAntigravityQuotaLabel(
+        'gemini-3.5-flash-low',
+        'Gemini 3.5 Flash (Medium)',
+        opaqueDisplayIndex,
+      ),
+    ).toBe('Gemini 3.5 Flash (Medium)')
+    expect(
+      resolveAntigravityQuotaLabel(
+        'gemini-3.5-flash-extra-low',
+        'Gemini 3.5 Flash (Low)',
+        opaqueDisplayIndex,
+      ),
+    ).toBe('Gemini 3.5 Flash (Low)')
+    expect(
+      resolveAntigravityQuotaLabel(
+        'gemini-pro-agent',
+        'gemini-pro-agent',
+        opaqueDisplayIndex,
+      ),
+    ).toBe('Gemini 3.1 Pro (High)')
+    expect(
+      resolveAntigravityQuotaLabel(
+        'gemini-3.1-pro-high',
+        'gemini-3.1-pro-high',
+        opaqueDisplayIndex,
+      ),
+    ).toBe('Gemini 3.1 Pro (High)')
+    expect(
+      resolveAntigravityQuotaLabel(
+        'gemini-2.5-flash',
+        'Gemini 3.1 Flash Lite',
+        opaqueDisplayIndex,
+      ),
+    ).toBe('Gemini 3.1 Flash Lite')
+    expect(
+      resolveAntigravityQuotaLabel(
+        'claude-sonnet-4-6',
+        'Claude Sonnet 4.6 (Thinking)',
+        opaqueDisplayIndex,
+      ),
+    ).toBe('Claude Sonnet 4.6 (Thinking)')
+    expect(
+      resolveAntigravityQuotaLabel(
+        'RateLimitResetCredit_05cbb6eeeb9c81918e011d8300f9ebfb',
+        'RateLimitResetCredit_05cbb6eeeb9c81918e011d8300f9ebfb',
+        opaqueDisplayIndex,
+      ),
+    ).toBe('Key-1')
+  })
+
+  it('keeps latest Gemini and Claude quota buckets before low-priority buckets', () => {
+    const items = [
+      {
+        model: 'tab_flash_lite_preview',
+        label: 'Tab Flash Lite Preview',
+        remainingPercent: 1,
+        resetSeconds: 10,
+      },
+      {
+        model: 'gemini-3.5-flash-extra-low',
+        label: 'Gemini 3.5 Flash (Low)',
+        remainingPercent: 95,
+        resetSeconds: null,
+      },
+      {
+        model: 'gemini-3.5-flash-low',
+        label: 'Gemini 3.5 Flash (Medium)',
+        remainingPercent: 90,
+        resetSeconds: null,
+      },
+      {
+        model: 'gemini-3-flash-agent',
+        label: 'Gemini 3.5 Flash (High)',
+        remainingPercent: 80,
+        resetSeconds: null,
+      },
+      {
+        model: 'gemini-pro-agent',
+        label: 'Gemini 3.1 Pro (High)',
+        remainingPercent: 70,
+        resetSeconds: null,
+      },
+      {
+        model: 'chat_20706',
+        label: 'chat_20706',
+        remainingPercent: 0,
+        resetSeconds: 1,
+      },
+      {
+        model: 'claude-opus-4-6-thinking',
+        label: 'Claude Opus 4.6 (Thinking)',
+        remainingPercent: 100,
+        resetSeconds: null,
+      },
+      {
+        model: 'gemini-2.5-flash-lite',
+        label: 'Gemini 3.1 Flash Lite',
+        remainingPercent: 5,
+        resetSeconds: 5,
+      },
+    ].sort(compareAntigravityQuotaItems)
+
+    expect(items.map(item => item.model)).toEqual([
+      'claude-opus-4-6-thinking',
+      'gemini-pro-agent',
+      'gemini-3-flash-agent',
+      'gemini-3.5-flash-low',
+      'gemini-3.5-flash-extra-low',
+      'gemini-2.5-flash-lite',
+      'tab_flash_lite_preview',
+      'chat_20706',
+    ])
+  })
+
+  it('deduplicates display labels while keeping the current preferred quota bucket', () => {
+    const items = dedupeAntigravityQuotaItemsByLabel([
+      {
+        model: 'gemini-3.1-pro-high',
+        label: 'Gemini 3.1 Pro (High)',
+        remainingPercent: 95,
+        resetSeconds: null,
+      },
+      {
+        model: 'gemini-pro-agent',
+        label: 'Gemini 3.1 Pro (High)',
+        remainingPercent: 40,
+        resetSeconds: null,
+      },
+      {
+        model: 'claude-sonnet-4-6-thinking',
+        label: 'Claude Sonnet 4.6 (Thinking)',
+        remainingPercent: 95,
+        resetSeconds: null,
+      },
+      {
+        model: 'claude-sonnet-4-6',
+        label: 'Claude Sonnet 4.6 (Thinking)',
+        remainingPercent: 40,
+        resetSeconds: null,
+      },
+      {
+        model: 'gemini-3-flash-agent',
+        label: 'Gemini 3.5 Flash (High)',
+        remainingPercent: 80,
+        resetSeconds: null,
+      },
+    ])
+
+    expect(items.map(item => item.model)).toEqual([
+      'claude-sonnet-4-6',
+      'gemini-pro-agent',
+      'gemini-3-flash-agent',
+    ])
+  })
+})
diff --git a/frontend/src/features/providers/utils/antigravityQuota.ts b/frontend/src/features/providers/utils/antigravityQuota.ts
new file mode 100644
index 000000000..981ad1252
--- /dev/null
+++ b/frontend/src/features/providers/utils/antigravityQuota.ts
@@ -0,0 +1,117 @@
+export interface AntigravityQuotaSortableItem {
+  model: string
+  label: string
+  remainingPercent: number
+  resetSeconds: number | null
+}
+
+const ANTIGRAVITY_MODEL_LABELS: Record<string, string> = {
+  'gemini-pro-agent': 'Gemini 3.1 Pro (High)',
+  'gemini-3.1-pro-high': 'Gemini 3.1 Pro (High)',
+  'gemini-3.1-pro-low': 'Gemini 3.1 Pro (Low)',
+  'gemini-3-flash-agent': 'Gemini 3.5 Flash (High)',
+  'gemini-3.5-flash-low': 'Gemini 3.5 Flash (Medium)',
+  'gemini-3.5-flash-extra-low': 'Gemini 3.5 Flash (Low)',
+  'claude-opus-4-6-thinking': 'Claude Opus 4.6 (Thinking)',
+  'claude-sonnet-4-6': 'Claude Sonnet 4.6 (Thinking)',
+  'claude-sonnet-4-6-thinking': 'Claude Sonnet 4.6 (Thinking)',
+  'gemini-3.1-flash-image': 'Gemini 3.1 Flash Image',
+  'gemini-3.1-flash-lite': 'Gemini 3.1 Flash Lite',
+  'gemini-3-flash': 'Gemini 3 Flash',
+  'gemini-2.5-pro': 'Gemini 2.5 Pro',
+  'gemini-2.5-flash-thinking': 'Gemini 3.1 Flash Lite',
+  'gemini-2.5-flash': 'Gemini 3.1 Flash Lite',
+  'gemini-2.5-flash-lite': 'Gemini 3.1 Flash Lite',
+  'gpt-oss-120b-medium': 'GPT-OSS 120B (Medium)',
+  'tab_flash_lite_preview': 'Tab Flash Lite Preview',
+  'tab_jump_flash_lite_preview': 'Tab Jump Flash Lite Preview',
+  'models/proactive-observer': 'Proactive Observer',
+}
+
+const ANTIGRAVITY_MODEL_PRIORITY: Record<string, number> = {
+  'claude-opus-4-6-thinking': 10,
+  'claude-sonnet-4-6': 20,
+  'claude-sonnet-4-6-thinking': 25,
+  'gemini-pro-agent': 30,
+  'gemini-3.1-pro-high': 35,
+  'gemini-3.1-pro-low': 40,
+  'gemini-3-flash-agent': 50,
+  'gemini-3.5-flash-low': 60,
+  'gemini-3.5-flash-extra-low': 70,
+  'gemini-3.1-flash-image': 80,
+  'gemini-3.1-flash-lite': 90,
+  'gemini-3-flash': 180,
+  'gemini-2.5-pro': 300,
+  'gemini-2.5-flash-thinking': 310,
+  'gemini-2.5-flash': 320,
+  'gemini-2.5-flash-lite': 330,
+  'gpt-oss-120b-medium': 700,
+  'models/proactive-observer': 780,
+  'tab_flash_lite_preview': 800,
+  'tab_jump_flash_lite_preview': 810,
+}
+
+export function isOpaqueAntigravityQuotaIdentifier(value: string): boolean {
+  return value.trim().startsWith('RateLimitResetCredit_')
+}
+
+export function resolveAntigravityQuotaLabel(
+  model: string,
+  rawLabel: unknown,
+  opaqueDisplayIndex: { value: number },
+): string {
+  const normalizedModel = model.trim()
+  const canonical = ANTIGRAVITY_MODEL_LABELS[normalizedModel]
+  if (canonical) return canonical
+
+  const candidate = String(rawLabel || '').trim()
+  if (candidate && !isOpaqueAntigravityQuotaIdentifier(candidate)) return candidate
+  if (isOpaqueAntigravityQuotaIdentifier(normalizedModel) || (candidate && isOpaqueAntigravityQuotaIdentifier(candidate))) {
+    const label = `Key-${opaqueDisplayIndex.value}`
+    opaqueDisplayIndex.value += 1
+    return label
+  }
+  return candidate || normalizedModel
+}
+
+function getAntigravityModelPriority(model: string): number {
+  const normalizedModel = model.trim()
+  const explicit = ANTIGRAVITY_MODEL_PRIORITY[normalizedModel]
+  if (explicit !== undefined) return explicit
+  if (normalizedModel.startsWith('claude-')) return 30
+  if (normalizedModel.startsWith('gemini-3.')) return 200
+  if (normalizedModel.startsWith('gemini-2.')) return 390
+  if (normalizedModel.startsWith('gemini-')) return 490
+  if (normalizedModel.startsWith('gpt-oss-')) return 700
+  if (normalizedModel.startsWith('models/')) return 780
+  if (normalizedModel.startsWith('tab_')) return 800
+  if (normalizedModel.startsWith('chat_')) return 900
+  if (isOpaqueAntigravityQuotaIdentifier(normalizedModel)) return 950
+  return 850
+}
+
+export function compareAntigravityQuotaItems<T extends AntigravityQuotaSortableItem>(
+  a: T,
+  b: T,
+): number {
+  return (getAntigravityModelPriority(a.model) - getAntigravityModelPriority(b.model))
+    || ((a.resetSeconds ?? Number.POSITIVE_INFINITY) - (b.resetSeconds ?? Number.POSITIVE_INFINITY))
+    || (a.remainingPercent - b.remainingPercent)
+    || a.label.localeCompare(b.label)
+    || a.model.localeCompare(b.model)
+}
+
+export function dedupeAntigravityQuotaItemsByLabel<T extends AntigravityQuotaSortableItem>(
+  items: T[],
+): T[] {
+  const selectedByLabel = new Map<string, T>()
+  for (const item of items) {
+    const label = item.label.trim()
+    if (!label) continue
+    const selected = selectedByLabel.get(label)
+    if (!selected || compareAntigravityQuotaItems(item, selected) < 0) {
+      selectedByLabel.set(label, item)
+    }
+  }
+  return Array.from(selectedByLabel.values()).sort(compareAntigravityQuotaItems)
+}
diff --git a/frontend/src/mocks/data.ts b/frontend/src/mocks/data.ts
index c9581ae14..9d9a74c2a 100644
--- a/frontend/src/mocks/data.ts
+++ b/frontend/src/mocks/data.ts
@@ -1192,6 +1192,7 @@ export const MOCK_API_FORMATS = {
     { value: 'openai:image', label: 'OpenAI Image', default_path: '/v1/images/generations', aliases: [] },
     { value: 'openai:video', label: 'OpenAI Video', default_path: '/v1/videos', aliases: [] },
     { value: 'gemini:generate_content', label: 'Gemini Generate Content', default_path: '/v1beta/models/{model}:{action}', aliases: [] },
+    { value: 'gemini:interactions', label: 'Gemini Interactions', default_path: '/v1/interactions', aliases: [] },
     { value: 'gemini:embedding', label: 'Gemini Embedding', default_path: '/v1beta/models/{model}:embedContent', aliases: [] },
     { value: 'gemini:video', label: 'Gemini Video', default_path: '/v1beta/models/{model}:predictLongRunning', aliases: [] },
     { value: 'jina:embedding', label: 'Jina Embedding', default_path: '/v1/embeddings', aliases: [] },
diff --git a/frontend/src/mocks/handler.ts b/frontend/src/mocks/handler.ts
index 1cb50c4d6..bd2046d98 100644
--- a/frontend/src/mocks/handler.ts
+++ b/frontend/src/mocks/handler.ts
@@ -533,6 +533,7 @@ function mockApiFormatDisplayName(apiFormat: string) {
   const labels: Record<string, string> = {
     'claude:messages': 'Claude Messages',
     'gemini:generate_content': 'Gemini Generate Content',
+    'gemini:interactions': 'Gemini Interactions',
     'openai:chat': 'OpenAI Chat',
     'openai:embedding': 'OpenAI Embedding'
   }