WIP: Remove provider name

`StatusUpdate::Failed` state by turning it into an error early, and then
faltten `StatusUpdate` into LanguageModelCompletionEvent

crates/agent/src/tests/mod.rs

@@ -21,9 +21,9 @@ use gpui::{
 use indoc::indoc;
 use language_model::{
     LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent, LanguageModelId,
-    LanguageModelProviderName, LanguageModelRegistry, LanguageModelRequest,
-    LanguageModelRequestMessage, LanguageModelToolResult, LanguageModelToolSchemaFormat,
-    LanguageModelToolUse, MessageContent, Role, StopReason, fake_provider::FakeLanguageModel,
+    LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
+    LanguageModelToolResult, LanguageModelToolSchemaFormat, LanguageModelToolUse, MessageContent,
+    Role, StopReason, fake_provider::FakeLanguageModel,
 };
 use pretty_assertions::assert_eq;
 use project::{
@@ -664,9 +664,7 @@ async fn test_resume_after_tool_use_limit(cx: &mut TestAppContext) {
     );
 
     // Simulate reaching tool use limit.
-    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::StatusUpdate(
-        cloud_llm_client::CompletionRequestStatus::ToolUseLimitReached,
-    ));
+    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::ToolUseLimitReached);
     fake_model.end_last_completion_stream();
     let last_event = events.collect::<Vec<_>>().await.pop().unwrap();
     assert!(
@@ -749,9 +747,7 @@ async fn test_send_after_tool_use_limit(cx: &mut TestAppContext) {
     };
     fake_model
         .send_last_completion_stream_event(LanguageModelCompletionEvent::ToolUse(tool_use.clone()));
-    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::StatusUpdate(
-        cloud_llm_client::CompletionRequestStatus::ToolUseLimitReached,
-    ));
+    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::ToolUseLimitReached);
     fake_model.end_last_completion_stream();
     let last_event = events.collect::<Vec<_>>().await.pop().unwrap();
     assert!(
@@ -1533,7 +1529,7 @@ async fn test_truncate_first_message(cx: &mut TestAppContext) {
     });
 
     fake_model.send_last_completion_stream_text_chunk("Hey!");
-    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::UsageUpdate(
+    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::TokenUsage(
         language_model::TokenUsage {
             input_tokens: 32_000,
             output_tokens: 16_000,
@@ -1591,7 +1587,7 @@ async fn test_truncate_first_message(cx: &mut TestAppContext) {
     });
     cx.run_until_parked();
     fake_model.send_last_completion_stream_text_chunk("Ahoy!");
-    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::UsageUpdate(
+    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::TokenUsage(
         language_model::TokenUsage {
             input_tokens: 40_000,
             output_tokens: 20_000,
@@ -1636,7 +1632,7 @@ async fn test_truncate_second_message(cx: &mut TestAppContext) {
         .unwrap();
     cx.run_until_parked();
     fake_model.send_last_completion_stream_text_chunk("Message 1 response");
-    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::UsageUpdate(
+    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::TokenUsage(
         language_model::TokenUsage {
             input_tokens: 32_000,
             output_tokens: 16_000,
@@ -1683,7 +1679,7 @@ async fn test_truncate_second_message(cx: &mut TestAppContext) {
     cx.run_until_parked();
 
     fake_model.send_last_completion_stream_text_chunk("Message 2 response");
-    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::UsageUpdate(
+    fake_model.send_last_completion_stream_event(LanguageModelCompletionEvent::TokenUsage(
         language_model::TokenUsage {
             input_tokens: 40_000,
             output_tokens: 20_000,
@@ -2159,7 +2155,6 @@ async fn test_send_retry_on_error(cx: &mut TestAppContext) {
 
     fake_model.send_last_completion_stream_text_chunk("Hey,");
     fake_model.send_last_completion_stream_error(LanguageModelCompletionError::ServerOverloaded {
-        provider: LanguageModelProviderName::new("Anthropic"),
         retry_after: Some(Duration::from_secs(3)),
     });
     fake_model.end_last_completion_stream();
@@ -2235,7 +2230,6 @@ async fn test_send_retry_finishes_tool_calls_on_error(cx: &mut TestAppContext) {
         tool_use_1.clone(),
     ));
     fake_model.send_last_completion_stream_error(LanguageModelCompletionError::ServerOverloaded {
-        provider: LanguageModelProviderName::new("Anthropic"),
         retry_after: Some(Duration::from_secs(3)),
     });
     fake_model.end_last_completion_stream();
@@ -2302,7 +2296,6 @@ async fn test_send_max_retries_exceeded(cx: &mut TestAppContext) {
     for _ in 0..crate::thread::MAX_RETRY_ATTEMPTS + 1 {
         fake_model.send_last_completion_stream_error(
             LanguageModelCompletionError::ServerOverloaded {
-                provider: LanguageModelProviderName::new("Anthropic"),
                 retry_after: Some(Duration::from_secs(3)),
             },
         );

crates/agent/src/thread.rs

@@ -15,7 +15,7 @@ use agent_settings::{
 use anyhow::{Context as _, Result, anyhow};
 use chrono::{DateTime, Utc};
 use client::{ModelRequestUsage, RequestUsage, UserStore};
-use cloud_llm_client::{CompletionIntent, CompletionRequestStatus, Plan, UsageLimit};
+use cloud_llm_client::{CompletionIntent, Plan, UsageLimit};
 use collections::{HashMap, HashSet, IndexMap};
 use fs::Fs;
 use futures::stream;
@@ -30,11 +30,11 @@ use gpui::{
 };
 use language_model::{
     LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent, LanguageModelExt,
-    LanguageModelId, LanguageModelImage, LanguageModelProviderId, LanguageModelRegistry,
-    LanguageModelRequest, LanguageModelRequestMessage, LanguageModelRequestTool,
-    LanguageModelToolResult, LanguageModelToolResultContent, LanguageModelToolSchemaFormat,
-    LanguageModelToolUse, LanguageModelToolUseId, Role, SelectedModel, StopReason, TokenUsage,
-    ZED_CLOUD_PROVIDER_ID,
+    LanguageModelId, LanguageModelImage, LanguageModelProviderId, LanguageModelProviderName,
+    LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
+    LanguageModelRequestTool, LanguageModelToolResult, LanguageModelToolResultContent,
+    LanguageModelToolSchemaFormat, LanguageModelToolUse, LanguageModelToolUseId, Role,
+    SelectedModel, StopReason, TokenUsage, ZED_CLOUD_PROVIDER_ID,
 };
 use project::Project;
 use prompt_store::ProjectContext;
@@ -1295,9 +1295,10 @@ impl Thread {
 
             if let Some(error) = error {
                 attempt += 1;
+                let provider = model.upstream_provider_name();
                 let retry = this.update(cx, |this, cx| {
                     let user_store = this.user_store.read(cx);
-                    this.handle_completion_error(error, attempt, user_store.plan())
+                    this.handle_completion_error(provider, error, attempt, user_store.plan())
                 })??;
                 let timer = cx.background_executor().timer(retry.duration);
                 event_stream.send_retry(retry);
@@ -1323,6 +1324,7 @@ impl Thread {
 
     fn handle_completion_error(
         &mut self,
+        provider: LanguageModelProviderName,
         error: LanguageModelCompletionError,
         attempt: u8,
         plan: Option<Plan>,
@@ -1389,7 +1391,7 @@ impl Thread {
         use LanguageModelCompletionEvent::*;
 
         match event {
-            StartMessage { .. } => {
+            LanguageModelCompletionEvent::StartMessage { .. } => {
                 self.flush_pending_message(cx);
                 self.pending_message = Some(AgentMessage::default());
             }
@@ -1416,7 +1418,7 @@ impl Thread {
                     ),
                 )));
             }
-            UsageUpdate(usage) => {
+            TokenUsage(usage) => {
                 telemetry::event!(
                     "Agent Thread Completion Usage Updated",
                     thread_id = self.id.to_string(),
@@ -1430,20 +1432,16 @@ impl Thread {
                 );
                 self.update_token_usage(usage, cx);
             }
-            StatusUpdate(CompletionRequestStatus::UsageUpdated { amount, limit }) => {
+            RequestUsage { amount, limit } => {
                 self.update_model_request_usage(amount, limit, cx);
             }
-            StatusUpdate(
-                CompletionRequestStatus::Started
-                | CompletionRequestStatus::Queued { .. }
-                | CompletionRequestStatus::Failed { .. },
-            ) => {}
-            StatusUpdate(CompletionRequestStatus::ToolUseLimitReached) => {
+            ToolUseLimitReached => {
                 self.tool_use_limit_reached = true;
             }
             Stop(StopReason::Refusal) => return Err(CompletionError::Refusal.into()),
             Stop(StopReason::MaxTokens) => return Err(CompletionError::MaxTokens.into()),
             Stop(StopReason::ToolUse | StopReason::EndTurn) => {}
+            Started | Queued { .. } => {}
         }
 
         Ok(None)
@@ -1687,9 +1685,7 @@ impl Thread {
                     let event = event.log_err()?;
                     let text = match event {
                         LanguageModelCompletionEvent::Text(text) => text,
-                        LanguageModelCompletionEvent::StatusUpdate(
-                            CompletionRequestStatus::UsageUpdated { amount, limit },
-                        ) => {
+                        LanguageModelCompletionEvent::RequestUsage { amount, limit } => {
                             this.update(cx, |thread, cx| {
                                 thread.update_model_request_usage(amount, limit, cx);
                             })
@@ -1753,9 +1749,7 @@ impl Thread {
                     let event = event?;
                     let text = match event {
                         LanguageModelCompletionEvent::Text(text) => text,
-                        LanguageModelCompletionEvent::StatusUpdate(
-                            CompletionRequestStatus::UsageUpdated { amount, limit },
-                        ) => {
+                        LanguageModelCompletionEvent::RequestUsage { amount, limit } => {
                             this.update(cx, |thread, cx| {
                                 thread.update_model_request_usage(amount, limit, cx);
                             })?;

crates/assistant_text_thread/src/text_thread.rs

@@ -7,9 +7,10 @@ use assistant_slash_command::{
 use assistant_slash_commands::FileCommandMetadata;
 use client::{self, ModelRequestUsage, RequestUsage, proto, telemetry::Telemetry};
 use clock::ReplicaId;
-use cloud_llm_client::{CompletionIntent, CompletionRequestStatus, UsageLimit};
+use cloud_llm_client::{CompletionIntent, UsageLimit};
 use collections::{HashMap, HashSet};
 use fs::{Fs, RenameOptions};
+
 use futures::{FutureExt, StreamExt, future::Shared};
 use gpui::{
     App, AppContext as _, Context, Entity, EventEmitter, RenderImage, SharedString, Subscription,
@@ -2073,14 +2074,15 @@ impl TextThread {
                                     });
 
                                 match event {
-                                    LanguageModelCompletionEvent::StatusUpdate(status_update) => {
-                                        if let CompletionRequestStatus::UsageUpdated { amount, limit } = status_update {
-                                            this.update_model_request_usage(
-                                                amount as u32,
-                                                limit,
-                                                cx,
-                                            );
-                                        }
+                                    LanguageModelCompletionEvent::Started |
+                                    LanguageModelCompletionEvent::Queued {..} |
+                                    LanguageModelCompletionEvent::ToolUseLimitReached { .. } => {}
+                                    LanguageModelCompletionEvent::RequestUsage { amount, limit } => {
+                                        this.update_model_request_usage(
+                                            amount as u32,
+                                            limit,
+                                            cx,
+                                        );
                                     }
                                     LanguageModelCompletionEvent::StartMessage { .. } => {}
                                     LanguageModelCompletionEvent::Stop(reason) => {
@@ -2142,7 +2144,7 @@ impl TextThread {
                                     }
                                     LanguageModelCompletionEvent::ToolUse(_) |
                                     LanguageModelCompletionEvent::ToolUseJsonParseError { .. } |
-                                    LanguageModelCompletionEvent::UsageUpdate(_) => {}
+                                    LanguageModelCompletionEvent::TokenUsage(_) => {}
                                 }
                             });
 

crates/eval/src/instance.rs

@@ -1250,9 +1250,12 @@ pub fn response_events_to_markdown(
                 ));
             }
             Ok(
-                LanguageModelCompletionEvent::UsageUpdate(_)
+                LanguageModelCompletionEvent::TokenUsage(_)
+                | LanguageModelCompletionEvent::ToolUseLimitReached
                 | LanguageModelCompletionEvent::StartMessage { .. }
-                | LanguageModelCompletionEvent::StatusUpdate { .. },
+                | LanguageModelCompletionEvent::RequestUsage { .. }
+                | LanguageModelCompletionEvent::Queued { .. }
+                | LanguageModelCompletionEvent::Started,
             ) => {}
             Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
                 json_parse_error, ..
@@ -1335,11 +1338,14 @@ impl ThreadDialog {
                 }
 
                 // Skip these
-                Ok(LanguageModelCompletionEvent::UsageUpdate(_))
+                Ok(LanguageModelCompletionEvent::TokenUsage(_))
                 | Ok(LanguageModelCompletionEvent::RedactedThinking { .. })
-                | Ok(LanguageModelCompletionEvent::StatusUpdate { .. })
                 | Ok(LanguageModelCompletionEvent::StartMessage { .. })
-                | Ok(LanguageModelCompletionEvent::Stop(_)) => {}
+                | Ok(LanguageModelCompletionEvent::Stop(_))
+                | Ok(LanguageModelCompletionEvent::Queued { .. })
+                | Ok(LanguageModelCompletionEvent::Started)
+                | Ok(LanguageModelCompletionEvent::RequestUsage { .. })
+                | Ok(LanguageModelCompletionEvent::ToolUseLimitReached) => {}
 
                 Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
                     json_parse_error,

crates/language_model/src/language_model.rs

@@ -12,7 +12,7 @@ pub mod fake_provider;
 use anthropic::{AnthropicError, parse_prompt_too_long};
 use anyhow::{Result, anyhow};
 use client::Client;
-use cloud_llm_client::{CompletionMode, CompletionRequestStatus};
+use cloud_llm_client::{CompletionMode, CompletionRequestStatus, UsageLimit};
 use futures::FutureExt;
 use futures::{StreamExt, future::BoxFuture, stream::BoxStream};
 use gpui::{AnyView, App, AsyncApp, SharedString, Task, Window};
@@ -70,7 +70,15 @@ pub fn init_settings(cx: &mut App) {
 /// A completion event from a language model.
 #[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
 pub enum LanguageModelCompletionEvent {
-    StatusUpdate(CompletionRequestStatus),
+    Queued {
+        position: usize,
+    },
+    Started,
+    RequestUsage {
+        amount: usize,
+        limit: UsageLimit,
+    },
+    ToolUseLimitReached,
     Stop(StopReason),
     Text(String),
     Thinking {
@@ -90,88 +98,93 @@ pub enum LanguageModelCompletionEvent {
     StartMessage {
         message_id: String,
     },
-    UsageUpdate(TokenUsage),
+    TokenUsage(TokenUsage),
+}
+
+impl LanguageModelCompletionEvent {
+    pub fn from_completion_request_status(
+        status: CompletionRequestStatus,
+    ) -> Result<Self, LanguageModelCompletionError> {
+        match status {
+            CompletionRequestStatus::Queued { position } => {
+                Ok(LanguageModelCompletionEvent::Queued { position })
+            }
+            CompletionRequestStatus::Started => Ok(LanguageModelCompletionEvent::Started),
+            CompletionRequestStatus::UsageUpdated { amount, limit } => {
+                Ok(LanguageModelCompletionEvent::RequestUsage { amount, limit })
+            }
+            CompletionRequestStatus::ToolUseLimitReached => {
+                Ok(LanguageModelCompletionEvent::ToolUseLimitReached)
+            }
+            CompletionRequestStatus::Failed {
+                code,
+                message,
+                request_id: _,
+                retry_after,
+            } => Err(LanguageModelCompletionError::from_cloud_failure(
+                code,
+                message,
+                retry_after.map(Duration::from_secs_f64),
+            )),
+        }
+    }
 }
 
 #[derive(Error, Debug)]
 pub enum LanguageModelCompletionError {
     #[error("prompt too large for context window")]
     PromptTooLarge { tokens: Option<u64> },
-    #[error("missing {provider} API key")]
-    NoApiKey { provider: LanguageModelProviderName },
-    #[error("{provider}'s API rate limit exceeded")]
-    RateLimitExceeded {
-        provider: LanguageModelProviderName,
-        retry_after: Option<Duration>,
-    },
-    #[error("{provider}'s API servers are overloaded right now")]
-    ServerOverloaded {
-        provider: LanguageModelProviderName,
-        retry_after: Option<Duration>,
-    },
-    #[error("{provider}'s API server reported an internal server error: {message}")]
-    ApiInternalServerError {
-        provider: LanguageModelProviderName,
-        message: String,
-    },
+    #[error("missing API key")]
+    NoApiKey,
+    #[error("API rate limit exceeded")]
+    RateLimitExceeded { retry_after: Option<Duration> },
+    #[error("API servers are overloaded right now")]
+    ServerOverloaded { retry_after: Option<Duration> },
+    #[error("API server reported an internal server error: {message}")]
+    ApiInternalServerError { message: String },
     #[error("{message}")]
     UpstreamProviderError {
         message: String,
         status: StatusCode,
         retry_after: Option<Duration>,
     },
-    #[error("HTTP response error from {provider}'s API: status {status_code} - {message:?}")]
+    #[error("HTTP response error from API: status {status_code} - {message:?}")]
     HttpResponseError {
-        provider: LanguageModelProviderName,
         status_code: StatusCode,
         message: String,
     },
 
     // Client errors
-    #[error("invalid request format to {provider}'s API: {message}")]
-    BadRequestFormat {
-        provider: LanguageModelProviderName,
-        message: String,
-    },
-    #[error("authentication error with {provider}'s API: {message}")]
-    AuthenticationError {
-        provider: LanguageModelProviderName,
-        message: String,
-    },
-    #[error("Permission error with {provider}'s API: {message}")]
-    PermissionError {
-        provider: LanguageModelProviderName,
-        message: String,
-    },
+    #[error("invalid request format to API: {message}")]
+    BadRequestFormat { message: String },
+    #[error("authentication error with API: {message}")]
+    AuthenticationError { message: String },
+    #[error("Permission error with API: {message}")]
+    PermissionError { message: String },
     #[error("language model provider API endpoint not found")]
-    ApiEndpointNotFound { provider: LanguageModelProviderName },
-    #[error("I/O error reading response from {provider}'s API")]
+    ApiEndpointNotFound,
+    #[error("I/O error reading response from API")]
     ApiReadResponseError {
-        provider: LanguageModelProviderName,
         #[source]
         error: io::Error,
     },
-    #[error("error serializing request to {provider} API")]
+    #[error("error serializing request to API")]
     SerializeRequest {
-        provider: LanguageModelProviderName,
         #[source]
         error: serde_json::Error,
     },
-    #[error("error building request body to {provider} API")]
+    #[error("error building request body to API")]
     BuildRequestBody {
-        provider: LanguageModelProviderName,
         #[source]
         error: http::Error,
     },
-    #[error("error sending HTTP request to {provider} API")]
+    #[error("error sending HTTP request to API")]
     HttpSend {
-        provider: LanguageModelProviderName,
         #[source]
         error: anyhow::Error,
     },
-    #[error("error deserializing {provider} API response")]
+    #[error("error deserializing API response")]
     DeserializeResponse {
-        provider: LanguageModelProviderName,
         #[source]
         error: serde_json::Error,
     },
@@ -182,6 +195,72 @@ pub enum LanguageModelCompletionError {
 }
 
 impl LanguageModelCompletionError {
+    fn display_format(&self, provider: LanguageModelProviderName) {
+        // match self {
+        // #[error("prompt too large for context window")]
+        // PromptTooLarge { tokens: Option<u64> },
+        // #[error("missing API key")]
+        // NoApiKey,
+        // #[error("API rate limit exceeded")]
+        // RateLimitExceeded { retry_after: Option<Duration> },
+        // #[error("API servers are overloaded right now")]
+        // ServerOverloaded { retry_after: Option<Duration> },
+        // #[error("API server reported an internal server error: {message}")]
+        // ApiInternalServerError { message: String },
+        // #[error("{message}")]
+        // UpstreamProviderError {
+        //     message: String,
+        //     status: StatusCode,
+        //     retry_after: Option<Duration>,
+        // },
+        // #[error("HTTP response error from API: status {status_code} - {message:?}")]
+        // HttpResponseError {
+        //     status_code: StatusCode,
+        //     message: String,
+        // },
+
+        // // Client errors
+        // #[error("invalid request format to API: {message}")]
+        // BadRequestFormat { message: String },
+        // #[error("authentication error with API: {message}")]
+        // AuthenticationError { message: String },
+        // #[error("Permission error with API: {message}")]
+        // PermissionError { message: String },
+        // #[error("language model provider API endpoint not found")]
+        // ApiEndpointNotFound,
+        // #[error("I/O error reading response from API")]
+        // ApiReadResponseError {
+        //     #[source]
+        //     error: io::Error,
+        // },
+        // #[error("error serializing request to API")]
+        // SerializeRequest {
+        //     #[source]
+        //     error: serde_json::Error,
+        // },
+        // #[error("error building request body to API")]
+        // BuildRequestBody {
+        //     #[source]
+        //     error: http::Error,
+        // },
+        // #[error("error sending HTTP request to API")]
+        // HttpSend {
+        //     #[source]
+        //     error: anyhow::Error,
+        // },
+        // #[error("error deserializing API response")]
+        // DeserializeResponse {
+        //     #[source]
+        //     error: serde_json::Error,
+        // },
+
+        // // TODO: Ideally this would be removed in favor of having a comprehensive list of errors.
+        // #[error(transparent)]
+        // Other(#[from] anyhow::Error),
+
+        // }
+    }
+
     fn parse_upstream_error_json(message: &str) -> Option<(StatusCode, String)> {
         let error_json = serde_json::from_str::<serde_json::Value>(message).ok()?;
         let upstream_status = error_json
@@ -198,7 +277,6 @@ impl LanguageModelCompletionError {
     }
 
     pub fn from_cloud_failure(
-        upstream_provider: LanguageModelProviderName,
         code: String,
         message: String,
         retry_after: Option<Duration>,
@@ -214,58 +292,46 @@ impl LanguageModelCompletionError {
             if let Some((upstream_status, inner_message)) =
                 Self::parse_upstream_error_json(&message)
             {
-                return Self::from_http_status(
-                    upstream_provider,
-                    upstream_status,
-                    inner_message,
-                    retry_after,
-                );
+                return Self::from_http_status(upstream_status, inner_message, retry_after);
             }
-            anyhow!("completion request failed, code: {code}, message: {message}").into()
+            Self::Other(anyhow!(
+                "completion request failed, code: {code}, message: {message}"
+            ))
         } else if let Some(status_code) = code
             .strip_prefix("upstream_http_")
             .and_then(|code| StatusCode::from_str(code).ok())
         {
-            Self::from_http_status(upstream_provider, status_code, message, retry_after)
+            Self::from_http_status(status_code, message, retry_after)
         } else if let Some(status_code) = code
             .strip_prefix("http_")
             .and_then(|code| StatusCode::from_str(code).ok())
         {
-            Self::from_http_status(ZED_CLOUD_PROVIDER_NAME, status_code, message, retry_after)
+            Self::from_http_status(status_code, message, retry_after)
         } else {
-            anyhow!("completion request failed, code: {code}, message: {message}").into()
+            Self::Other(anyhow!(
+                "completion request failed, code: {code}, message: {message}"
+            ))
         }
     }
 
     pub fn from_http_status(
-        provider: LanguageModelProviderName,
         status_code: StatusCode,
         message: String,
         retry_after: Option<Duration>,
     ) -> Self {
         match status_code {
-            StatusCode::BAD_REQUEST => Self::BadRequestFormat { provider, message },
-            StatusCode::UNAUTHORIZED => Self::AuthenticationError { provider, message },
-            StatusCode::FORBIDDEN => Self::PermissionError { provider, message },
-            StatusCode::NOT_FOUND => Self::ApiEndpointNotFound { provider },
+            StatusCode::BAD_REQUEST => Self::BadRequestFormat { message },
+            StatusCode::UNAUTHORIZED => Self::AuthenticationError { message },
+            StatusCode::FORBIDDEN => Self::PermissionError { message },
+            StatusCode::NOT_FOUND => Self::ApiEndpointNotFound,
             StatusCode::PAYLOAD_TOO_LARGE => Self::PromptTooLarge {
                 tokens: parse_prompt_too_long(&message),
             },
-            StatusCode::TOO_MANY_REQUESTS => Self::RateLimitExceeded {
-                provider,
-                retry_after,
-            },
-            StatusCode::INTERNAL_SERVER_ERROR => Self::ApiInternalServerError { provider, message },
-            StatusCode::SERVICE_UNAVAILABLE => Self::ServerOverloaded {
-                provider,
-                retry_after,
-            },
-            _ if status_code.as_u16() == 529 => Self::ServerOverloaded {
-                provider,
-                retry_after,
-            },
+            StatusCode::TOO_MANY_REQUESTS => Self::RateLimitExceeded { retry_after },
+            StatusCode::INTERNAL_SERVER_ERROR => Self::ApiInternalServerError { message },
+            StatusCode::SERVICE_UNAVAILABLE => Self::ServerOverloaded { retry_after },
+            _ if status_code.as_u16() == 529 => Self::ServerOverloaded { retry_after },
             _ => Self::HttpResponseError {
-                provider,
                 status_code,
                 message,
             },
@@ -275,31 +341,25 @@ impl LanguageModelCompletionError {
 
 impl From<AnthropicError> for LanguageModelCompletionError {
     fn from(error: AnthropicError) -> Self {
-        let provider = ANTHROPIC_PROVIDER_NAME;
         match error {
-            AnthropicError::SerializeRequest(error) => Self::SerializeRequest { provider, error },
-            AnthropicError::BuildRequestBody(error) => Self::BuildRequestBody { provider, error },
-            AnthropicError::HttpSend(error) => Self::HttpSend { provider, error },
-            AnthropicError::DeserializeResponse(error) => {
-                Self::DeserializeResponse { provider, error }
-            }
-            AnthropicError::ReadResponse(error) => Self::ApiReadResponseError { provider, error },
+            AnthropicError::SerializeRequest(error) => Self::SerializeRequest { error },
+            AnthropicError::BuildRequestBody(error) => Self::BuildRequestBody { error },
+            AnthropicError::HttpSend(error) => Self::HttpSend { error },
+            AnthropicError::DeserializeResponse(error) => Self::DeserializeResponse { error },
+            AnthropicError::ReadResponse(error) => Self::ApiReadResponseError { error },
             AnthropicError::HttpResponseError {
                 status_code,
                 message,
             } => Self::HttpResponseError {
-                provider,
                 status_code,
                 message,
             },
             AnthropicError::RateLimit { retry_after } => Self::RateLimitExceeded {
-                provider,
                 retry_after: Some(retry_after),
             },
-            AnthropicError::ServerOverloaded { retry_after } => Self::ServerOverloaded {
-                provider,
-                retry_after,
-            },
+            AnthropicError::ServerOverloaded { retry_after } => {
+                Self::ServerOverloaded { retry_after }
+            }
             AnthropicError::ApiError(api_error) => api_error.into(),
         }
     }
@@ -308,37 +368,26 @@ impl From<AnthropicError> for LanguageModelCompletionError {
 impl From<anthropic::ApiError> for LanguageModelCompletionError {
     fn from(error: anthropic::ApiError) -> Self {
         use anthropic::ApiErrorCode::*;
-        let provider = ANTHROPIC_PROVIDER_NAME;
         match error.code() {
             Some(code) => match code {
                 InvalidRequestError => Self::BadRequestFormat {
-                    provider,
                     message: error.message,
                 },
                 AuthenticationError => Self::AuthenticationError {
-                    provider,
                     message: error.message,
                 },
                 PermissionError => Self::PermissionError {
-                    provider,
                     message: error.message,
                 },
-                NotFoundError => Self::ApiEndpointNotFound { provider },
+                NotFoundError => Self::ApiEndpointNotFound,
                 RequestTooLarge => Self::PromptTooLarge {
                     tokens: parse_prompt_too_long(&error.message),
                 },
-                RateLimitError => Self::RateLimitExceeded {
-                    provider,
-                    retry_after: None,
-                },
+                RateLimitError => Self::RateLimitExceeded { retry_after: None },
                 ApiError => Self::ApiInternalServerError {
-                    provider,
                     message: error.message,
                 },
-                OverloadedError => Self::ServerOverloaded {
-                    provider,
-                    retry_after: None,
-                },
+                OverloadedError => Self::ServerOverloaded { retry_after: None },
             },
             None => Self::Other(error.into()),
         }
@@ -349,7 +398,7 @@ impl From<open_ai::RequestError> for LanguageModelCompletionError {
     fn from(error: open_ai::RequestError) -> Self {
         match error {
             open_ai::RequestError::HttpResponseError {
-                provider,
+                provider: _,
                 status_code,
                 body,
                 headers,
@@ -359,7 +408,7 @@ impl From<open_ai::RequestError> for LanguageModelCompletionError {
                     .and_then(|val| val.to_str().ok()?.parse::<u64>().ok())
                     .map(Duration::from_secs);
 
-                Self::from_http_status(provider.into(), status_code, body, retry_after)
+                Self::from_http_status(status_code, body, retry_after)
             }
             open_ai::RequestError::Other(e) => Self::Other(e),
         }
@@ -368,23 +417,18 @@ impl From<open_ai::RequestError> for LanguageModelCompletionError {
 
 impl From<OpenRouterError> for LanguageModelCompletionError {
     fn from(error: OpenRouterError) -> Self {
-        let provider = LanguageModelProviderName::new("OpenRouter");
         match error {
-            OpenRouterError::SerializeRequest(error) => Self::SerializeRequest { provider, error },
-            OpenRouterError::BuildRequestBody(error) => Self::BuildRequestBody { provider, error },
-            OpenRouterError::HttpSend(error) => Self::HttpSend { provider, error },
-            OpenRouterError::DeserializeResponse(error) => {
-                Self::DeserializeResponse { provider, error }
-            }
-            OpenRouterError::ReadResponse(error) => Self::ApiReadResponseError { provider, error },
+            OpenRouterError::SerializeRequest(error) => Self::SerializeRequest { error },
+            OpenRouterError::BuildRequestBody(error) => Self::BuildRequestBody { error },
+            OpenRouterError::HttpSend(error) => Self::HttpSend { error },
+            OpenRouterError::DeserializeResponse(error) => Self::DeserializeResponse { error },
+            OpenRouterError::ReadResponse(error) => Self::ApiReadResponseError { error },
             OpenRouterError::RateLimit { retry_after } => Self::RateLimitExceeded {
-                provider,
                 retry_after: Some(retry_after),
             },
-            OpenRouterError::ServerOverloaded { retry_after } => Self::ServerOverloaded {
-                provider,
-                retry_after,
-            },
+            OpenRouterError::ServerOverloaded { retry_after } => {
+                Self::ServerOverloaded { retry_after }
+            }
             OpenRouterError::ApiError(api_error) => api_error.into(),
         }
     }
@@ -393,41 +437,28 @@ impl From<OpenRouterError> for LanguageModelCompletionError {
 impl From<open_router::ApiError> for LanguageModelCompletionError {
     fn from(error: open_router::ApiError) -> Self {
         use open_router::ApiErrorCode::*;
-        let provider = LanguageModelProviderName::new("OpenRouter");
         match error.code {
             InvalidRequestError => Self::BadRequestFormat {
-                provider,
                 message: error.message,
             },
             AuthenticationError => Self::AuthenticationError {
-                provider,
                 message: error.message,
             },
             PaymentRequiredError => Self::AuthenticationError {
-                provider,
                 message: format!("Payment required: {}", error.message),
             },
             PermissionError => Self::PermissionError {
-                provider,
                 message: error.message,
             },
             RequestTimedOut => Self::HttpResponseError {
-                provider,
                 status_code: StatusCode::REQUEST_TIMEOUT,
                 message: error.message,
             },
-            RateLimitError => Self::RateLimitExceeded {
-                provider,
-                retry_after: None,
-            },
+            RateLimitError => Self::RateLimitExceeded { retry_after: None },
             ApiError => Self::ApiInternalServerError {
-                provider,
                 message: error.message,
             },
-            OverloadedError => Self::ServerOverloaded {
-                provider,
-                retry_after: None,
-            },
+            OverloadedError => Self::ServerOverloaded { retry_after: None },
         }
     }
 }
@@ -633,7 +664,10 @@ pub trait LanguageModel: Send + Sync {
                         let last_token_usage = last_token_usage.clone();
                         async move {
                             match result {
-                                Ok(LanguageModelCompletionEvent::StatusUpdate { .. }) => None,
+                                Ok(LanguageModelCompletionEvent::Queued { .. }) => None,
+                                Ok(LanguageModelCompletionEvent::Started) => None,
+                                Ok(LanguageModelCompletionEvent::RequestUsage { .. }) => None,
+                                Ok(LanguageModelCompletionEvent::ToolUseLimitReached) => None,
                                 Ok(LanguageModelCompletionEvent::StartMessage { .. }) => None,
                                 Ok(LanguageModelCompletionEvent::Text(text)) => Some(Ok(text)),
                                 Ok(LanguageModelCompletionEvent::Thinking { .. }) => None,
@@ -643,7 +677,7 @@ pub trait LanguageModel: Send + Sync {
                                 Ok(LanguageModelCompletionEvent::ToolUseJsonParseError {
                                     ..
                                 }) => None,
-                                Ok(LanguageModelCompletionEvent::UsageUpdate(token_usage)) => {
+                                Ok(LanguageModelCompletionEvent::TokenUsage(token_usage)) => {
                                     *last_token_usage.lock() = token_usage;
                                     None
                                 }
@@ -832,16 +866,13 @@ mod tests {
     #[test]
     fn test_from_cloud_failure_with_upstream_http_error() {
         let error = LanguageModelCompletionError::from_cloud_failure(
-            String::from("anthropic").into(),
             "upstream_http_error".to_string(),
             r#"{"code":"upstream_http_error","message":"Received an error from the Anthropic API: upstream connect error or disconnect/reset before headers. reset reason: connection timeout","upstream_status":503}"#.to_string(),
             None,
         );
 
         match error {
-            LanguageModelCompletionError::ServerOverloaded { provider, .. } => {
-                assert_eq!(provider.0, "anthropic");
-            }
+            LanguageModelCompletionError::ServerOverloaded { .. } => {}
             _ => panic!(
                 "Expected ServerOverloaded error for 503 status, got: {:?}",
                 error
@@ -849,15 +880,13 @@ mod tests {
         }
 
         let error = LanguageModelCompletionError::from_cloud_failure(
-            String::from("anthropic").into(),
             "upstream_http_error".to_string(),
             r#"{"code":"upstream_http_error","message":"Internal server error","upstream_status":500}"#.to_string(),
             None,
         );
 
         match error {
-            LanguageModelCompletionError::ApiInternalServerError { provider, message } => {
-                assert_eq!(provider.0, "anthropic");
+            LanguageModelCompletionError::ApiInternalServerError { message } => {
                 assert_eq!(message, "Internal server error");
             }
             _ => panic!(
@@ -870,16 +899,13 @@ mod tests {
     #[test]
     fn test_from_cloud_failure_with_standard_format() {
         let error = LanguageModelCompletionError::from_cloud_failure(
-            String::from("anthropic").into(),
             "upstream_http_503".to_string(),
             "Service unavailable".to_string(),
             None,
         );
 
         match error {
-            LanguageModelCompletionError::ServerOverloaded { provider, .. } => {
-                assert_eq!(provider.0, "anthropic");
-            }
+            LanguageModelCompletionError::ServerOverloaded { .. } => {}
             _ => panic!("Expected ServerOverloaded error for upstream_http_503"),
         }
     }
@@ -887,16 +913,13 @@ mod tests {
     #[test]
     fn test_upstream_http_error_connection_timeout() {
         let error = LanguageModelCompletionError::from_cloud_failure(
-            String::from("anthropic").into(),
             "upstream_http_error".to_string(),
             r#"{"code":"upstream_http_error","message":"Received an error from the Anthropic API: upstream connect error or disconnect/reset before headers. reset reason: connection timeout","upstream_status":503}"#.to_string(),
             None,
         );
 
         match error {
-            LanguageModelCompletionError::ServerOverloaded { provider, .. } => {
-                assert_eq!(provider.0, "anthropic");
-            }
+            LanguageModelCompletionError::ServerOverloaded { .. } => {}
             _ => panic!(
                 "Expected ServerOverloaded error for connection timeout with 503 status, got: {:?}",
                 error
@@ -904,15 +927,13 @@ mod tests {
         }
 
         let error = LanguageModelCompletionError::from_cloud_failure(
-            String::from("anthropic").into(),
             "upstream_http_error".to_string(),
             r#"{"code":"upstream_http_error","message":"Received an error from the Anthropic API: upstream connect error or disconnect/reset before headers. reset reason: connection timeout","upstream_status":500}"#.to_string(),
             None,
         );
 
         match error {
-            LanguageModelCompletionError::ApiInternalServerError { provider, message } => {
-                assert_eq!(provider.0, "anthropic");
+            LanguageModelCompletionError::ApiInternalServerError { message } => {
                 assert_eq!(
                     message,
                     "Received an error from the Anthropic API: upstream connect error or disconnect/reset before headers. reset reason: connection timeout"

crates/language_models/src/provider/anthropic.rs

@@ -320,9 +320,7 @@ impl AnthropicModel {
 
         async move {
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey {
-                    provider: PROVIDER_NAME,
-                });
+                return Err(LanguageModelCompletionError::NoApiKey);
             };
             let request = anthropic::stream_completion(
                 http_client.as_ref(),
@@ -756,7 +754,7 @@ impl AnthropicEventMapper {
             Event::MessageStart { message } => {
                 update_usage(&mut self.usage, &message.usage);
                 vec![
-                    Ok(LanguageModelCompletionEvent::UsageUpdate(convert_usage(
+                    Ok(LanguageModelCompletionEvent::TokenUsage(convert_usage(
                         &self.usage,
                     ))),
                     Ok(LanguageModelCompletionEvent::StartMessage {
@@ -778,9 +776,9 @@ impl AnthropicEventMapper {
                         }
                     };
                 }
-                vec![Ok(LanguageModelCompletionEvent::UsageUpdate(
-                    convert_usage(&self.usage),
-                ))]
+                vec![Ok(LanguageModelCompletionEvent::TokenUsage(convert_usage(
+                    &self.usage,
+                )))]
             }
             Event::MessageStop => {
                 vec![Ok(LanguageModelCompletionEvent::Stop(self.stop_reason))]

crates/language_models/src/provider/bedrock.rs

@@ -975,7 +975,7 @@ pub fn map_to_language_model_completion_events(
                                 ))
                             }),
                         ConverseStreamOutput::Metadata(cb_meta) => cb_meta.usage.map(|metadata| {
-                            Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+                            Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                                 input_tokens: metadata.input_tokens as u64,
                                 output_tokens: metadata.output_tokens as u64,
                                 cache_creation_input_tokens: metadata

crates/language_models/src/provider/cloud.rs

@@ -541,7 +541,6 @@ impl From<ApiError> for LanguageModelCompletionError {
             }
 
             return LanguageModelCompletionError::from_http_status(
-                PROVIDER_NAME,
                 error.status,
                 cloud_error.message,
                 None,
@@ -549,12 +548,7 @@ impl From<ApiError> for LanguageModelCompletionError {
         }
 
         let retry_after = None;
-        LanguageModelCompletionError::from_http_status(
-            PROVIDER_NAME,
-            error.status,
-            error.body,
-            retry_after,
-        )
+        LanguageModelCompletionError::from_http_status(error.status, error.body, retry_after)
     }
 }
 
@@ -961,7 +955,7 @@ where
                     vec![Err(LanguageModelCompletionError::from(error))]
                 }
                 Ok(CompletionEvent::Status(event)) => {
-                    vec![Ok(LanguageModelCompletionEvent::StatusUpdate(event))]
+                    vec![LanguageModelCompletionEvent::from_completion_request_status(event)]
                 }
                 Ok(CompletionEvent::Event(event)) => map_callback(event),
             })
@@ -1313,8 +1307,7 @@ mod tests {
         let completion_error: LanguageModelCompletionError = api_error.into();
 
         match completion_error {
-            LanguageModelCompletionError::ApiInternalServerError { provider, message } => {
-                assert_eq!(provider, PROVIDER_NAME);
+            LanguageModelCompletionError::ApiInternalServerError { message } => {
                 assert_eq!(message, "Regular internal server error");
             }
             _ => panic!(
@@ -1362,9 +1355,7 @@ mod tests {
         let completion_error: LanguageModelCompletionError = api_error.into();
 
         match completion_error {
-            LanguageModelCompletionError::ApiInternalServerError { provider, .. } => {
-                assert_eq!(provider, PROVIDER_NAME);
-            }
+            LanguageModelCompletionError::ApiInternalServerError { .. } => {}
             _ => panic!(
                 "Expected ApiInternalServerError for invalid JSON, got: {:?}",
                 completion_error

crates/language_models/src/provider/copilot_chat.rs

@@ -422,14 +422,12 @@ pub fn map_to_language_model_completion_events(
                         }
 
                         if let Some(usage) = event.usage {
-                            events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(
-                                TokenUsage {
-                                    input_tokens: usage.prompt_tokens,
-                                    output_tokens: usage.completion_tokens,
-                                    cache_creation_input_tokens: 0,
-                                    cache_read_input_tokens: 0,
-                                },
-                            )));
+                            events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
+                                input_tokens: usage.prompt_tokens,
+                                output_tokens: usage.completion_tokens,
+                                cache_creation_input_tokens: 0,
+                                cache_read_input_tokens: 0,
+                            })));
                         }
 
                         match choice.finish_reason.as_deref() {
@@ -610,7 +608,7 @@ impl CopilotResponsesEventMapper {
             copilot::copilot_responses::StreamEvent::Completed { response } => {
                 let mut events = Vec::new();
                 if let Some(usage) = response.usage {
-                    events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+                    events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                         input_tokens: usage.input_tokens.unwrap_or(0),
                         output_tokens: usage.output_tokens.unwrap_or(0),
                         cache_creation_input_tokens: 0,
@@ -643,7 +641,7 @@ impl CopilotResponsesEventMapper {
 
                 let mut events = Vec::new();
                 if let Some(usage) = response.usage {
-                    events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+                    events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                         input_tokens: usage.input_tokens.unwrap_or(0),
                         output_tokens: usage.output_tokens.unwrap_or(0),
                         cache_creation_input_tokens: 0,
@@ -655,7 +653,6 @@ impl CopilotResponsesEventMapper {
             }
 
             copilot::copilot_responses::StreamEvent::Failed { response } => {
-                let provider = PROVIDER_NAME;
                 let (status_code, message) = match response.error {
                     Some(error) => {
                         let status_code = StatusCode::from_str(&error.code)
@@ -668,7 +665,6 @@ impl CopilotResponsesEventMapper {
                     ),
                 };
                 vec![Err(LanguageModelCompletionError::HttpResponseError {
-                    provider,
                     status_code,
                     message,
                 })]
@@ -1099,7 +1095,7 @@ mod tests {
         ));
         assert!(matches!(
             mapped[2],
-            LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+            LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                 input_tokens: 5,
                 output_tokens: 3,
                 ..
@@ -1207,7 +1203,7 @@ mod tests {
         let mapped = map_events(events);
         assert!(matches!(
             mapped[0],
-            LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+            LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                 input_tokens: 10,
                 output_tokens: 0,
                 ..

crates/language_models/src/provider/deepseek.rs

@@ -224,9 +224,7 @@ impl DeepSeekLanguageModel {
 
         let future = self.request_limiter.stream(async move {
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey {
-                    provider: PROVIDER_NAME,
-                });
+                return Err(LanguageModelCompletionError::NoApiKey);
             };
             let request =
                 deepseek::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
@@ -479,7 +477,7 @@ impl DeepSeekEventMapper {
         }
 
         if let Some(usage) = event.usage {
-            events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+            events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                 input_tokens: usage.prompt_tokens,
                 output_tokens: usage.completion_tokens,
                 cache_creation_input_tokens: 0,

crates/language_models/src/provider/google.rs

@@ -350,10 +350,7 @@ impl LanguageModel for GoogleLanguageModel {
 
         async move {
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey {
-                    provider: PROVIDER_NAME,
-                }
-                .into());
+                return Err(LanguageModelCompletionError::NoApiKey.into());
             };
             let response = google_ai::count_tokens(
                 http_client.as_ref(),
@@ -608,9 +605,9 @@ impl GoogleEventMapper {
         let mut wants_to_use_tool = false;
         if let Some(usage_metadata) = event.usage_metadata {
             update_usage(&mut self.usage, &usage_metadata);
-            events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(
-                convert_usage(&self.usage),
-            )))
+            events.push(Ok(LanguageModelCompletionEvent::TokenUsage(convert_usage(
+                &self.usage,
+            ))))
         }
 
         if let Some(prompt_feedback) = event.prompt_feedback

crates/language_models/src/provider/lmstudio.rs

@@ -547,7 +547,7 @@ impl LmStudioEventMapper {
         }
 
         if let Some(usage) = event.usage {
-            events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+            events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                 input_tokens: usage.prompt_tokens,
                 output_tokens: usage.completion_tokens,
                 cache_creation_input_tokens: 0,

crates/language_models/src/provider/mistral.rs

@@ -291,9 +291,7 @@ impl MistralLanguageModel {
 
         let future = self.request_limiter.stream(async move {
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey {
-                    provider: PROVIDER_NAME,
-                });
+                return Err(LanguageModelCompletionError::NoApiKey);
             };
             let request =
                 mistral::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
@@ -672,7 +670,7 @@ impl MistralEventMapper {
         }
 
         if let Some(usage) = event.usage {
-            events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+            events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                 input_tokens: usage.prompt_tokens,
                 output_tokens: usage.completion_tokens,
                 cache_creation_input_tokens: 0,

crates/language_models/src/provider/ollama.rs

@@ -603,7 +603,7 @@ fn map_to_language_model_completion_events(
             };
 
             if delta.done {
-                events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+                events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                     input_tokens: delta.prompt_eval_count.unwrap_or(0),
                     output_tokens: delta.eval_count.unwrap_or(0),
                     cache_creation_input_tokens: 0,

crates/language_models/src/provider/open_ai.rs

@@ -228,7 +228,7 @@ impl OpenAiLanguageModel {
         let future = self.request_limiter.stream(async move {
             let provider = PROVIDER_NAME;
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey { provider });
+                return Err(LanguageModelCompletionError::NoApiKey);
             };
             let request = stream_completion(
                 http_client.as_ref(),
@@ -534,7 +534,7 @@ impl OpenAiEventMapper {
     ) -> Vec<Result<LanguageModelCompletionEvent, LanguageModelCompletionError>> {
         let mut events = Vec::new();
         if let Some(usage) = event.usage {
-            events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+            events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                 input_tokens: usage.prompt_tokens,
                 output_tokens: usage.completion_tokens,
                 cache_creation_input_tokens: 0,

crates/language_models/src/provider/open_ai_compatible.rs

@@ -227,7 +227,7 @@ impl OpenAiCompatibleLanguageModel {
         let provider = self.provider_name.clone();
         let future = self.request_limiter.stream(async move {
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey { provider });
+                return Err(LanguageModelCompletionError::NoApiKey);
             };
             let request = stream_completion(
                 http_client.as_ref(),

crates/language_models/src/provider/open_router.rs

@@ -84,9 +84,7 @@ impl State {
         let http_client = self.http_client.clone();
         let api_url = OpenRouterLanguageModelProvider::api_url(cx);
         let Some(api_key) = self.api_key_state.key(&api_url) else {
-            return Task::ready(Err(LanguageModelCompletionError::NoApiKey {
-                provider: PROVIDER_NAME,
-            }));
+            return Task::ready(Err(LanguageModelCompletionError::NoApiKey));
         };
         cx.spawn(async move |this, cx| {
             let models = list_models(http_client.as_ref(), &api_url, &api_key)
@@ -288,9 +286,7 @@ impl OpenRouterLanguageModel {
 
         async move {
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey {
-                    provider: PROVIDER_NAME,
-                });
+                return Err(LanguageModelCompletionError::NoApiKey);
             };
             let request =
                 open_router::stream_completion(http_client.as_ref(), &api_url, &api_key, request);
@@ -613,7 +609,7 @@ impl OpenRouterEventMapper {
         }
 
         if let Some(usage) = event.usage {
-            events.push(Ok(LanguageModelCompletionEvent::UsageUpdate(TokenUsage {
+            events.push(Ok(LanguageModelCompletionEvent::TokenUsage(TokenUsage {
                 input_tokens: usage.prompt_tokens,
                 output_tokens: usage.completion_tokens,
                 cache_creation_input_tokens: 0,

crates/language_models/src/provider/vercel.rs

@@ -222,7 +222,7 @@ impl VercelLanguageModel {
         let future = self.request_limiter.stream(async move {
             let provider = PROVIDER_NAME;
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey { provider });
+                return Err(LanguageModelCompletionError::NoApiKey);
             };
             let request = open_ai::stream_completion(
                 http_client.as_ref(),

crates/language_models/src/provider/x_ai.rs

@@ -230,7 +230,7 @@ impl XAiLanguageModel {
         let future = self.request_limiter.stream(async move {
             let provider = PROVIDER_NAME;
             let Some(api_key) = api_key else {
-                return Err(LanguageModelCompletionError::NoApiKey { provider });
+                return Err(LanguageModelCompletionError::NoApiKey);
             };
             let request = open_ai::stream_completion(
                 http_client.as_ref(),