WIP

Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: Nathan Sobo <nathan@zed.dev>

crates/agent/Cargo.toml

@@ -68,6 +68,7 @@ zstd.workspace = true
 
 [dev-dependencies]
 assistant_tools.workspace = true
+assistant_tool = { workspace = true, "features" = ["test-support"] }
 gpui = { workspace = true, "features" = ["test-support"] }
 indoc.workspace = true
 language = { workspace = true, "features" = ["test-support"] }

crates/agent/src/agent.rs

@@ -5,13 +5,12 @@ pub mod context_store;
 pub mod history_store;
 pub mod thread;
 pub mod thread_store;
-pub mod tool_use;
 
 pub use context::{AgentContext, ContextId, ContextLoadResult};
 pub use context_store::ContextStore;
 pub use thread::{
-    LastRestoreCheckpoint, Message, MessageCrease, MessageId, MessageSegment, Thread, ThreadError,
-    ThreadEvent, ThreadFeedback, ThreadId, ThreadSummary, TokenUsageRatio,
+    LastRestoreCheckpoint, Message, MessageCrease, MessageId, MessageSegment, ThreadError,
+    ThreadEvent, ThreadFeedback, ThreadId, ThreadSummary, TokenUsageRatio, ZedAgentThread,
 };
 pub use thread_store::{SerializedThread, TextThreadStore, ThreadStore};
 

crates/agent/src/context.rs

@@ -1,4 +1,4 @@
-use crate::thread::Thread;
+use crate::thread::ZedAgentThread;
 use assistant_context::AssistantContext;
 use assistant_tool::outline;
 use collections::HashSet;
@@ -560,7 +560,7 @@ impl Display for FetchedUrlContext {
 
 #[derive(Debug, Clone)]
 pub struct ThreadContextHandle {
-    pub thread: Entity<Thread>,
+    pub agent: Entity<ZedAgentThread>,
     pub context_id: ContextId,
 }
 
@@ -573,23 +573,23 @@ pub struct ThreadContext {
 
 impl ThreadContextHandle {
     pub fn eq_for_key(&self, other: &Self) -> bool {
-        self.thread == other.thread
+        self.agent == other.agent
     }
 
     pub fn hash_for_key<H: Hasher>(&self, state: &mut H) {
-        self.thread.hash(state)
+        self.agent.hash(state)
     }
 
     pub fn title(&self, cx: &App) -> SharedString {
-        self.thread.read(cx).summary().or_default()
+        self.agent.read(cx).summary().or_default()
     }
 
     fn load(self, cx: &App) -> Task<Option<(AgentContext, Vec<Entity<Buffer>>)>> {
         cx.spawn(async move |cx| {
-            let text = Thread::wait_for_detailed_summary_or_text(&self.thread, cx).await?;
+            let text = ZedAgentThread::wait_for_detailed_summary_or_text(&self.agent, cx).await?;
             let title = self
-                .thread
-                .read_with(cx, |thread, _cx| thread.summary().or_default())
+                .agent
+                .read_with(cx, |thread, _| thread.summary().or_default())
                 .ok()?;
             let context = AgentContext::Thread(ThreadContext {
                 title,

crates/agent/src/context_store.rs

@@ -4,7 +4,7 @@ use crate::{
         FetchedUrlContext, FileContextHandle, ImageContext, RulesContextHandle,
         SelectionContextHandle, SymbolContextHandle, TextThreadContextHandle, ThreadContextHandle,
     },
-    thread::{MessageId, Thread, ThreadId},
+    thread::{MessageId, ThreadId, ZedAgentThread},
     thread_store::ThreadStore,
 };
 use anyhow::{Context as _, Result, anyhow};
@@ -66,8 +66,9 @@ impl ContextStore {
 
     pub fn new_context_for_thread(
         &self,
-        thread: &Thread,
+        thread: &ZedAgentThread,
         exclude_messages_from_id: Option<MessageId>,
+        _cx: &App,
     ) -> Vec<AgentContextHandle> {
         let existing_context = thread
             .messages()
@@ -206,12 +207,15 @@ impl ContextStore {
 
     pub fn add_thread(
         &mut self,
-        thread: Entity<Thread>,
+        thread: Entity<ZedAgentThread>,
         remove_if_exists: bool,
         cx: &mut Context<Self>,
     ) -> Option<AgentContextHandle> {
         let context_id = self.next_context_id.post_inc();
-        let context = AgentContextHandle::Thread(ThreadContextHandle { thread, context_id });
+        let context = AgentContextHandle::Thread(ThreadContextHandle {
+            agent: thread,
+            context_id,
+        });
 
         if let Some(existing) = self.context_set.get(AgentContextKey::ref_cast(&context)) {
             if remove_if_exists {
@@ -387,7 +391,10 @@ impl ContextStore {
                 if let Some(thread) = thread.upgrade() {
                     let context_id = self.next_context_id.post_inc();
                     self.insert_context(
-                        AgentContextHandle::Thread(ThreadContextHandle { thread, context_id }),
+                        AgentContextHandle::Thread(ThreadContextHandle {
+                            agent: thread,
+                            context_id,
+                        }),
                         cx,
                     );
                 }
@@ -411,11 +418,11 @@ impl ContextStore {
         match &context {
             AgentContextHandle::Thread(thread_context) => {
                 if let Some(thread_store) = self.thread_store.clone() {
-                    thread_context.thread.update(cx, |thread, cx| {
+                    thread_context.agent.update(cx, |thread, cx| {
                         thread.start_generating_detailed_summary_if_needed(thread_store, cx);
                     });
                     self.context_thread_ids
-                        .insert(thread_context.thread.read(cx).id().clone());
+                        .insert(thread_context.agent.read(cx).id().clone());
                 } else {
                     return false;
                 }
@@ -441,7 +448,7 @@ impl ContextStore {
             match context {
                 AgentContextHandle::Thread(thread_context) => {
                     self.context_thread_ids
-                        .remove(thread_context.thread.read(cx).id());
+                        .remove(thread_context.agent.read(cx).id());
                 }
                 AgentContextHandle::TextThread(text_thread_context) => {
                     if let Some(path) = text_thread_context.context.read(cx).path() {
@@ -570,7 +577,7 @@ pub enum SuggestedContext {
     },
     Thread {
         name: SharedString,
-        thread: WeakEntity<Thread>,
+        thread: WeakEntity<ZedAgentThread>,
     },
     TextThread {
         name: SharedString,

crates/agent/src/thread_store.rs

@@ -1,7 +1,7 @@
 use crate::{
     context_server_tool::ContextServerTool,
     thread::{
-        DetailedSummaryState, ExceededWindowError, MessageId, ProjectSnapshot, Thread, ThreadId,
+        DetailedSummaryState, ExceededWindowError, MessageId, ProjectSnapshot, ThreadId, ZedAgentThread,
     },
 };
 use agent_settings::{AgentProfileId, CompletionMode};
@@ -400,9 +400,9 @@ impl ThreadStore {
         self.threads.iter()
     }
 
-    pub fn create_thread(&mut self, cx: &mut Context<Self>) -> Entity<Thread> {
+    pub fn create_thread(&mut self, cx: &mut Context<Self>) -> Entity<ZedAgentThread> {
         cx.new(|cx| {
-            Thread::new(
+            ZedAgentThread::new(
                 self.project.clone(),
                 self.tools.clone(),
                 self.prompt_builder.clone(),
@@ -416,9 +416,9 @@ impl ThreadStore {
         &mut self,
         serialized: SerializedThread,
         cx: &mut Context<Self>,
-    ) -> Entity<Thread> {
+    ) -> Entity<ZedAgentThread> {
         cx.new(|cx| {
-            Thread::deserialize(
+            ZedAgentThread::deserialize(
                 ThreadId::new(),
                 serialized,
                 self.project.clone(),
@@ -436,7 +436,7 @@ impl ThreadStore {
         id: &ThreadId,
         window: &mut Window,
         cx: &mut Context<Self>,
-    ) -> Task<Result<Entity<Thread>>> {
+    ) -> Task<Result<Entity<ZedAgentThread>>> {
         let id = id.clone();
         let database_future = ThreadsDatabase::global_future(cx);
         let this = cx.weak_entity();
@@ -449,7 +449,7 @@ impl ThreadStore {
 
             let thread = this.update_in(cx, |this, window, cx| {
                 cx.new(|cx| {
-                    Thread::deserialize(
+                    ZedAgentThread::deserialize(
                         id.clone(),
                         thread,
                         this.project.clone(),
@@ -466,9 +466,14 @@ impl ThreadStore {
         })
     }
 
-    pub fn save_thread(&self, thread: &Entity<Thread>, cx: &mut Context<Self>) -> Task<Result<()>> {
-        let (metadata, serialized_thread) =
-            thread.update(cx, |thread, cx| (thread.id().clone(), thread.serialize(cx)));
+    pub fn save_thread(
+        &self,
+        thread: &Entity<ZedAgentThread>,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        let (metadata, serialized_thread) = thread.update(cx, |thread, cx| {
+            (thread.id().clone(), thread.serialize(cx))
+        });
 
         let database_future = ThreadsDatabase::global_future(cx);
         cx.spawn(async move |this, cx| {
@@ -700,7 +705,7 @@ impl SerializedThreadV0_1_0 {
     }
 }
 
-#[derive(Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Clone)]
 pub struct SerializedMessage {
     pub id: MessageId,
     pub role: Role,
@@ -714,11 +719,9 @@ pub struct SerializedMessage {
     pub context: String,
     #[serde(default)]
     pub creases: Vec<SerializedCrease>,
-    #[serde(default)]
-    pub is_hidden: bool,
 }
 
-#[derive(Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Clone)]
 #[serde(tag = "type")]
 pub enum SerializedMessageSegment {
     #[serde(rename = "text")]
@@ -736,14 +739,14 @@ pub enum SerializedMessageSegment {
     },
 }
 
-#[derive(Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Clone)]
 pub struct SerializedToolUse {
     pub id: LanguageModelToolUseId,
     pub name: SharedString,
     pub input: serde_json::Value,
 }
 
-#[derive(Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Clone)]
 pub struct SerializedToolResult {
     pub tool_use_id: LanguageModelToolUseId,
     pub is_error: bool,
@@ -801,12 +804,11 @@ impl LegacySerializedMessage {
             tool_results: self.tool_results,
             context: String::new(),
             creases: Vec::new(),
-            is_hidden: false,
         }
     }
 }
 
-#[derive(Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Clone)]
 pub struct SerializedCrease {
     pub start: usize,
     pub end: usize,
@@ -1105,7 +1107,6 @@ mod tests {
                     tool_results: vec![],
                     context: "".to_string(),
                     creases: vec![],
-                    is_hidden: false
                 }],
                 version: SerializedThread::VERSION.to_string(),
                 initial_project_snapshot: None,
@@ -1138,7 +1139,6 @@ mod tests {
                     tool_results: vec![],
                     context: "".to_string(),
                     creases: vec![],
-                    is_hidden: false,
                 },
                 SerializedMessage {
                     id: MessageId(2),
@@ -1154,7 +1154,6 @@ mod tests {
                     tool_results: vec![],
                     context: "".to_string(),
                     creases: vec![],
-                    is_hidden: false,
                 },
                 SerializedMessage {
                     id: MessageId(1),
@@ -1171,7 +1170,6 @@ mod tests {
                     }],
                     context: "".to_string(),
                     creases: vec![],
-                    is_hidden: false,
                 },
             ],
             version: SerializedThreadV0_1_0::VERSION.to_string(),
@@ -1203,7 +1201,6 @@ mod tests {
                         tool_results: vec![],
                         context: "".to_string(),
                         creases: vec![],
-                        is_hidden: false
                     },
                     SerializedMessage {
                         id: MessageId(2),
@@ -1224,7 +1221,6 @@ mod tests {
                         }],
                         context: "".to_string(),
                         creases: vec![],
-                        is_hidden: false,
                     },
                 ],
                 version: SerializedThread::VERSION.to_string(),

crates/agent/src/tool_use.rs

@@ -1,567 +0,0 @@
-use crate::{
-    thread::{MessageId, PromptId, ThreadId},
-    thread_store::SerializedMessage,
-};
-use anyhow::Result;
-use assistant_tool::{
-    AnyToolCard, Tool, ToolResultContent, ToolResultOutput, ToolUseStatus, ToolWorkingSet,
-};
-use collections::HashMap;
-use futures::{FutureExt as _, future::Shared};
-use gpui::{App, Entity, SharedString, Task, Window};
-use icons::IconName;
-use language_model::{
-    ConfiguredModel, LanguageModel, LanguageModelRequest, LanguageModelToolResult,
-    LanguageModelToolResultContent, LanguageModelToolUse, LanguageModelToolUseId, Role,
-};
-use project::Project;
-use std::sync::Arc;
-use util::truncate_lines_to_byte_limit;
-
-#[derive(Debug)]
-pub struct ToolUse {
-    pub id: LanguageModelToolUseId,
-    pub name: SharedString,
-    pub ui_text: SharedString,
-    pub status: ToolUseStatus,
-    pub input: serde_json::Value,
-    pub icon: icons::IconName,
-    pub needs_confirmation: bool,
-}
-
-pub struct ToolUseState {
-    tools: Entity<ToolWorkingSet>,
-    tool_uses_by_assistant_message: HashMap<MessageId, Vec<LanguageModelToolUse>>,
-    tool_results: HashMap<LanguageModelToolUseId, LanguageModelToolResult>,
-    pending_tool_uses_by_id: HashMap<LanguageModelToolUseId, PendingToolUse>,
-    tool_result_cards: HashMap<LanguageModelToolUseId, AnyToolCard>,
-    tool_use_metadata_by_id: HashMap<LanguageModelToolUseId, ToolUseMetadata>,
-}
-
-impl ToolUseState {
-    pub fn new(tools: Entity<ToolWorkingSet>) -> Self {
-        Self {
-            tools,
-            tool_uses_by_assistant_message: HashMap::default(),
-            tool_results: HashMap::default(),
-            pending_tool_uses_by_id: HashMap::default(),
-            tool_result_cards: HashMap::default(),
-            tool_use_metadata_by_id: HashMap::default(),
-        }
-    }
-
-    /// Constructs a [`ToolUseState`] from the given list of [`SerializedMessage`]s.
-    ///
-    /// Accepts a function to filter the tools that should be used to populate the state.
-    ///
-    /// If `window` is `None` (e.g., when in headless mode or when running evals),
-    /// tool cards won't be deserialized
-    pub fn from_serialized_messages(
-        tools: Entity<ToolWorkingSet>,
-        messages: &[SerializedMessage],
-        project: Entity<Project>,
-        window: Option<&mut Window>, // None in headless mode
-        cx: &mut App,
-    ) -> Self {
-        let mut this = Self::new(tools);
-        let mut tool_names_by_id = HashMap::default();
-        let mut window = window;
-
-        for message in messages {
-            match message.role {
-                Role::Assistant => {
-                    if !message.tool_uses.is_empty() {
-                        let tool_uses = message
-                            .tool_uses
-                            .iter()
-                            .map(|tool_use| LanguageModelToolUse {
-                                id: tool_use.id.clone(),
-                                name: tool_use.name.clone().into(),
-                                raw_input: tool_use.input.to_string(),
-                                input: tool_use.input.clone(),
-                                is_input_complete: true,
-                            })
-                            .collect::<Vec<_>>();
-
-                        tool_names_by_id.extend(
-                            tool_uses
-                                .iter()
-                                .map(|tool_use| (tool_use.id.clone(), tool_use.name.clone())),
-                        );
-
-                        this.tool_uses_by_assistant_message
-                            .insert(message.id, tool_uses);
-
-                        for tool_result in &message.tool_results {
-                            let tool_use_id = tool_result.tool_use_id.clone();
-                            let Some(tool_use) = tool_names_by_id.get(&tool_use_id) else {
-                                log::warn!("no tool name found for tool use: {tool_use_id:?}");
-                                continue;
-                            };
-
-                            this.tool_results.insert(
-                                tool_use_id.clone(),
-                                LanguageModelToolResult {
-                                    tool_use_id: tool_use_id.clone(),
-                                    tool_name: tool_use.clone(),
-                                    is_error: tool_result.is_error,
-                                    content: tool_result.content.clone(),
-                                    output: tool_result.output.clone(),
-                                },
-                            );
-
-                            if let Some(window) = &mut window {
-                                if let Some(tool) = this.tools.read(cx).tool(tool_use, cx) {
-                                    if let Some(output) = tool_result.output.clone() {
-                                        if let Some(card) = tool.deserialize_card(
-                                            output,
-                                            project.clone(),
-                                            window,
-                                            cx,
-                                        ) {
-                                            this.tool_result_cards.insert(tool_use_id, card);
-                                        }
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-                Role::System | Role::User => {}
-            }
-        }
-
-        this
-    }
-
-    pub fn cancel_pending(&mut self) -> Vec<PendingToolUse> {
-        let mut cancelled_tool_uses = Vec::new();
-        self.pending_tool_uses_by_id
-            .retain(|tool_use_id, tool_use| {
-                if matches!(tool_use.status, PendingToolUseStatus::Error { .. }) {
-                    return true;
-                }
-
-                let content = "Tool canceled by user".into();
-                self.tool_results.insert(
-                    tool_use_id.clone(),
-                    LanguageModelToolResult {
-                        tool_use_id: tool_use_id.clone(),
-                        tool_name: tool_use.name.clone(),
-                        content,
-                        output: None,
-                        is_error: true,
-                    },
-                );
-                cancelled_tool_uses.push(tool_use.clone());
-                false
-            });
-        cancelled_tool_uses
-    }
-
-    pub fn pending_tool_uses(&self) -> Vec<&PendingToolUse> {
-        self.pending_tool_uses_by_id.values().collect()
-    }
-
-    pub fn tool_uses_for_message(&self, id: MessageId, cx: &App) -> Vec<ToolUse> {
-        let Some(tool_uses_for_message) = &self.tool_uses_by_assistant_message.get(&id) else {
-            return Vec::new();
-        };
-
-        let mut tool_uses = Vec::new();
-
-        for tool_use in tool_uses_for_message.iter() {
-            let tool_result = self.tool_results.get(&tool_use.id);
-
-            let status = (|| {
-                if let Some(tool_result) = tool_result {
-                    let content = tool_result
-                        .content
-                        .to_str()
-                        .map(|str| str.to_owned().into())
-                        .unwrap_or_default();
-
-                    return if tool_result.is_error {
-                        ToolUseStatus::Error(content)
-                    } else {
-                        ToolUseStatus::Finished(content)
-                    };
-                }
-
-                if let Some(pending_tool_use) = self.pending_tool_uses_by_id.get(&tool_use.id) {
-                    match pending_tool_use.status {
-                        PendingToolUseStatus::Idle => ToolUseStatus::Pending,
-                        PendingToolUseStatus::NeedsConfirmation { .. } => {
-                            ToolUseStatus::NeedsConfirmation
-                        }
-                        PendingToolUseStatus::Running { .. } => ToolUseStatus::Running,
-                        PendingToolUseStatus::Error(ref err) => {
-                            ToolUseStatus::Error(err.clone().into())
-                        }
-                        PendingToolUseStatus::InputStillStreaming => {
-                            ToolUseStatus::InputStillStreaming
-                        }
-                    }
-                } else {
-                    ToolUseStatus::Pending
-                }
-            })();
-
-            let (icon, needs_confirmation) =
-                if let Some(tool) = self.tools.read(cx).tool(&tool_use.name, cx) {
-                    (tool.icon(), tool.needs_confirmation(&tool_use.input, cx))
-                } else {
-                    (IconName::Cog, false)
-                };
-
-            tool_uses.push(ToolUse {
-                id: tool_use.id.clone(),
-                name: tool_use.name.clone().into(),
-                ui_text: self.tool_ui_label(
-                    &tool_use.name,
-                    &tool_use.input,
-                    tool_use.is_input_complete,
-                    cx,
-                ),
-                input: tool_use.input.clone(),
-                status,
-                icon,
-                needs_confirmation,
-            })
-        }
-
-        tool_uses
-    }
-
-    pub fn tool_ui_label(
-        &self,
-        tool_name: &str,
-        input: &serde_json::Value,
-        is_input_complete: bool,
-        cx: &App,
-    ) -> SharedString {
-        if let Some(tool) = self.tools.read(cx).tool(tool_name, cx) {
-            if is_input_complete {
-                tool.ui_text(input).into()
-            } else {
-                tool.still_streaming_ui_text(input).into()
-            }
-        } else {
-            format!("Unknown tool {tool_name:?}").into()
-        }
-    }
-
-    pub fn tool_results_for_message(
-        &self,
-        assistant_message_id: MessageId,
-    ) -> Vec<&LanguageModelToolResult> {
-        let Some(tool_uses) = self
-            .tool_uses_by_assistant_message
-            .get(&assistant_message_id)
-        else {
-            return Vec::new();
-        };
-
-        tool_uses
-            .iter()
-            .filter_map(|tool_use| self.tool_results.get(&tool_use.id))
-            .collect()
-    }
-
-    pub fn message_has_tool_results(&self, assistant_message_id: MessageId) -> bool {
-        self.tool_uses_by_assistant_message
-            .get(&assistant_message_id)
-            .map_or(false, |results| !results.is_empty())
-    }
-
-    pub fn tool_result(
-        &self,
-        tool_use_id: &LanguageModelToolUseId,
-    ) -> Option<&LanguageModelToolResult> {
-        self.tool_results.get(tool_use_id)
-    }
-
-    pub fn tool_result_card(&self, tool_use_id: &LanguageModelToolUseId) -> Option<&AnyToolCard> {
-        self.tool_result_cards.get(tool_use_id)
-    }
-
-    pub fn insert_tool_result_card(
-        &mut self,
-        tool_use_id: LanguageModelToolUseId,
-        card: AnyToolCard,
-    ) {
-        self.tool_result_cards.insert(tool_use_id, card);
-    }
-
-    pub fn request_tool_use(
-        &mut self,
-        assistant_message_id: MessageId,
-        tool_use: LanguageModelToolUse,
-        metadata: ToolUseMetadata,
-        cx: &App,
-    ) -> Arc<str> {
-        let tool_uses = self
-            .tool_uses_by_assistant_message
-            .entry(assistant_message_id)
-            .or_default();
-
-        let mut existing_tool_use_found = false;
-
-        for existing_tool_use in tool_uses.iter_mut() {
-            if existing_tool_use.id == tool_use.id {
-                *existing_tool_use = tool_use.clone();
-                existing_tool_use_found = true;
-            }
-        }
-
-        if !existing_tool_use_found {
-            tool_uses.push(tool_use.clone());
-        }
-
-        let status = if tool_use.is_input_complete {
-            self.tool_use_metadata_by_id
-                .insert(tool_use.id.clone(), metadata);
-
-            PendingToolUseStatus::Idle
-        } else {
-            PendingToolUseStatus::InputStillStreaming
-        };
-
-        let ui_text: Arc<str> = self
-            .tool_ui_label(
-                &tool_use.name,
-                &tool_use.input,
-                tool_use.is_input_complete,
-                cx,
-            )
-            .into();
-
-        let may_perform_edits = self
-            .tools
-            .read(cx)
-            .tool(&tool_use.name, cx)
-            .is_some_and(|tool| tool.may_perform_edits());
-
-        self.pending_tool_uses_by_id.insert(
-            tool_use.id.clone(),
-            PendingToolUse {
-                assistant_message_id,
-                id: tool_use.id,
-                name: tool_use.name.clone(),
-                ui_text: ui_text.clone(),
-                input: tool_use.input,
-                may_perform_edits,
-                status,
-            },
-        );
-
-        ui_text
-    }
-
-    pub fn run_pending_tool(
-        &mut self,
-        tool_use_id: LanguageModelToolUseId,
-        ui_text: SharedString,
-        task: Task<()>,
-    ) {
-        if let Some(tool_use) = self.pending_tool_uses_by_id.get_mut(&tool_use_id) {
-            tool_use.ui_text = ui_text.into();
-            tool_use.status = PendingToolUseStatus::Running {
-                _task: task.shared(),
-            };
-        }
-    }
-
-    pub fn confirm_tool_use(
-        &mut self,
-        tool_use_id: LanguageModelToolUseId,
-        ui_text: impl Into<Arc<str>>,
-        input: serde_json::Value,
-        request: Arc<LanguageModelRequest>,
-        tool: Arc<dyn Tool>,
-    ) {
-        if let Some(tool_use) = self.pending_tool_uses_by_id.get_mut(&tool_use_id) {
-            let ui_text = ui_text.into();
-            tool_use.ui_text = ui_text.clone();
-            let confirmation = Confirmation {
-                tool_use_id,
-                input,
-                request,
-                tool,
-                ui_text,
-            };
-            tool_use.status = PendingToolUseStatus::NeedsConfirmation(Arc::new(confirmation));
-        }
-    }
-
-    pub fn insert_tool_output(
-        &mut self,
-        tool_use_id: LanguageModelToolUseId,
-        tool_name: Arc<str>,
-        output: Result<ToolResultOutput>,
-        configured_model: Option<&ConfiguredModel>,
-    ) -> Option<PendingToolUse> {
-        let metadata = self.tool_use_metadata_by_id.remove(&tool_use_id);
-
-        telemetry::event!(
-            "Agent Tool Finished",
-            model = metadata
-                .as_ref()
-                .map(|metadata| metadata.model.telemetry_id()),
-            model_provider = metadata
-                .as_ref()
-                .map(|metadata| metadata.model.provider_id().to_string()),
-            thread_id = metadata.as_ref().map(|metadata| metadata.thread_id.clone()),
-            prompt_id = metadata.as_ref().map(|metadata| metadata.prompt_id.clone()),
-            tool_name,
-            success = output.is_ok()
-        );
-
-        match output {
-            Ok(output) => {
-                let tool_result = output.content;
-                const BYTES_PER_TOKEN_ESTIMATE: usize = 3;
-
-                let old_use = self.pending_tool_uses_by_id.remove(&tool_use_id);
-
-                // Protect from overly large output
-                let tool_output_limit = configured_model
-                    .map(|model| model.model.max_token_count() as usize * BYTES_PER_TOKEN_ESTIMATE)
-                    .unwrap_or(usize::MAX);
-
-                let content = match tool_result {
-                    ToolResultContent::Text(text) => {
-                        let text = if text.len() < tool_output_limit {
-                            text
-                        } else {
-                            let truncated = truncate_lines_to_byte_limit(&text, tool_output_limit);
-                            format!(
-                                "Tool result too long. The first {} bytes:\n\n{}",
-                                truncated.len(),
-                                truncated
-                            )
-                        };
-                        LanguageModelToolResultContent::Text(text.into())
-                    }
-                    ToolResultContent::Image(language_model_image) => {
-                        if language_model_image.estimate_tokens() < tool_output_limit {
-                            LanguageModelToolResultContent::Image(language_model_image)
-                        } else {
-                            self.tool_results.insert(
-                                tool_use_id.clone(),
-                                LanguageModelToolResult {
-                                    tool_use_id: tool_use_id.clone(),
-                                    tool_name,
-                                    content: "Tool responded with an image that would exceeded the remaining tokens".into(),
-                                    is_error: true,
-                                    output: None,
-                                },
-                            );
-
-                            return old_use;
-                        }
-                    }
-                };
-
-                self.tool_results.insert(
-                    tool_use_id.clone(),
-                    LanguageModelToolResult {
-                        tool_use_id: tool_use_id.clone(),
-                        tool_name,
-                        content,
-                        is_error: false,
-                        output: output.output,
-                    },
-                );
-
-                old_use
-            }
-            Err(err) => {
-                self.tool_results.insert(
-                    tool_use_id.clone(),
-                    LanguageModelToolResult {
-                        tool_use_id: tool_use_id.clone(),
-                        tool_name,
-                        content: LanguageModelToolResultContent::Text(err.to_string().into()),
-                        is_error: true,
-                        output: None,
-                    },
-                );
-
-                if let Some(tool_use) = self.pending_tool_uses_by_id.get_mut(&tool_use_id) {
-                    tool_use.status = PendingToolUseStatus::Error(err.to_string().into());
-                }
-
-                self.pending_tool_uses_by_id.get(&tool_use_id).cloned()
-            }
-        }
-    }
-
-    pub fn has_tool_results(&self, assistant_message_id: MessageId) -> bool {
-        self.tool_uses_by_assistant_message
-            .contains_key(&assistant_message_id)
-    }
-
-    pub fn tool_results(
-        &self,
-        assistant_message_id: MessageId,
-    ) -> impl Iterator<Item = (&LanguageModelToolUse, Option<&LanguageModelToolResult>)> {
-        self.tool_uses_by_assistant_message
-            .get(&assistant_message_id)
-            .into_iter()
-            .flatten()
-            .map(|tool_use| (tool_use, self.tool_results.get(&tool_use.id)))
-    }
-}
-
-#[derive(Debug, Clone)]
-pub struct PendingToolUse {
-    pub id: LanguageModelToolUseId,
-    /// The ID of the Assistant message in which the tool use was requested.
-    #[allow(unused)]
-    pub assistant_message_id: MessageId,
-    pub name: Arc<str>,
-    pub ui_text: Arc<str>,
-    pub input: serde_json::Value,
-    pub status: PendingToolUseStatus,
-    pub may_perform_edits: bool,
-}
-
-#[derive(Debug, Clone)]
-pub struct Confirmation {
-    pub tool_use_id: LanguageModelToolUseId,
-    pub input: serde_json::Value,
-    pub ui_text: Arc<str>,
-    pub request: Arc<LanguageModelRequest>,
-    pub tool: Arc<dyn Tool>,
-}
-
-#[derive(Debug, Clone)]
-pub enum PendingToolUseStatus {
-    InputStillStreaming,
-    Idle,
-    NeedsConfirmation(Arc<Confirmation>),
-    Running { _task: Shared<Task<()>> },
-    Error(#[allow(unused)] Arc<str>),
-}
-
-impl PendingToolUseStatus {
-    pub fn is_idle(&self) -> bool {
-        matches!(self, PendingToolUseStatus::Idle)
-    }
-
-    pub fn is_error(&self) -> bool {
-        matches!(self, PendingToolUseStatus::Error(_))
-    }
-
-    pub fn needs_confirmation(&self) -> bool {
-        matches!(self, PendingToolUseStatus::NeedsConfirmation { .. })
-    }
-}
-
-#[derive(Clone)]
-pub struct ToolUseMetadata {
-    pub model: Arc<dyn LanguageModel>,
-    pub thread_id: ThreadId,
-    pub prompt_id: PromptId,
-}

crates/agent_ui/Cargo.toml

@@ -96,6 +96,7 @@ zed_llm_client.workspace = true
 
 [dev-dependencies]
 assistant_tools.workspace = true
+assistant_tool = { workspace = true, "features" = ["test-support"] }
 buffer_diff = { workspace = true, features = ["test-support"] }
 editor = { workspace = true, features = ["test-support"] }
 gpui = { workspace = true, "features" = ["test-support"] }

crates/agent_ui/src/active_thread.rs

@@ -5,16 +5,17 @@ use crate::ui::{
     AddedContext, AgentNotification, AgentNotificationEvent, AnimatedLabel, ContextPill,
 };
 use crate::{AgentPanel, ModelUsageContext};
+use agent::thread::{ToolUseSegment, UserMessageParams};
 use agent::{
     ContextStore, LastRestoreCheckpoint, MessageCrease, MessageId, MessageSegment, TextThreadStore,
-    Thread, ThreadError, ThreadEvent, ThreadFeedback, ThreadStore, ThreadSummary,
+    ThreadError, ThreadEvent, ThreadFeedback, ThreadStore, ThreadSummary, ZedAgentThread,
     context::{self, AgentContextHandle, RULES_ICON},
+    thread::{PendingToolUseStatus, ToolUse},
     thread_store::RulesLoadingError,
-    tool_use::{PendingToolUseStatus, ToolUse},
 };
 use agent_settings::{AgentSettings, NotifyWhenAgentWaiting};
 use anyhow::Context as _;
-use assistant_tool::ToolUseStatus;
+use assistant_tool::{AnyToolCard, ToolUseStatus, ToolWorkingSet};
 use audio::{Audio, Sound};
 use collections::{HashMap, HashSet};
 use editor::actions::{MoveUp, Paste};
@@ -30,13 +31,14 @@ use gpui::{
 };
 use language::{Buffer, Language, LanguageRegistry};
 use language_model::{
-    LanguageModelRequestMessage, LanguageModelToolUseId, MessageContent, Role, StopReason,
+    LanguageModelRequestMessage, LanguageModelToolResultContent, LanguageModelToolUseId,
+    MessageContent, Role, StopReason,
 };
 use markdown::parser::{CodeBlockKind, CodeBlockMetadata};
 use markdown::{
     HeadingLevelStyles, Markdown, MarkdownElement, MarkdownStyle, ParsedMarkdown, PathWithRange,
 };
-use project::{ProjectEntryId, ProjectItem as _};
+use project::{Project, ProjectEntryId, ProjectItem as _};
 use rope::Point;
 use settings::{Settings as _, SettingsStore, update_settings_file};
 use std::ffi::OsStr;
@@ -50,11 +52,10 @@ use ui::{
     Disclosure, KeyBinding, PopoverMenuHandle, Scrollbar, ScrollbarState, TextSize, Tooltip,
     prelude::*,
 };
-use util::ResultExt as _;
 use util::markdown::MarkdownCodeBlock;
+use util::{ResultExt as _, debug_panic};
 use workspace::{CollaboratorId, Workspace};
 use zed_actions::assistant::OpenRulesLibrary;
-use zed_llm_client::CompletionIntent;
 
 const CODEBLOCK_CONTAINER_GROUP: &str = "codeblock_container";
 const EDIT_PREVIOUS_MESSAGE_MIN_LINES: usize = 1;
@@ -64,8 +65,10 @@ pub struct ActiveThread {
     language_registry: Arc<LanguageRegistry>,
     thread_store: Entity<ThreadStore>,
     text_thread_store: Entity<TextThreadStore>,
-    thread: Entity<Thread>,
+    agent: Entity<ZedAgentThread>,
+    // thread: Entity<Thread>,
     workspace: WeakEntity<Workspace>,
+    project: Entity<Project>,
     save_thread_task: Option<Task<()>>,
     messages: Vec<MessageId>,
     list_state: ListState,
@@ -92,7 +95,7 @@ struct RenderedMessage {
     segments: Vec<RenderedMessageSegment>,
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 struct RenderedToolUse {
     label: Entity<Markdown>,
     input: Entity<Markdown>,
@@ -162,17 +165,103 @@ impl RenderedMessage {
                         cx,
                     )))
             }
-            MessageSegment::RedactedThinking(_) => {}
+            MessageSegment::ToolUse { .. } => {
+                todo!()
+            }
         };
     }
+
+    fn update_tool_call(
+        &mut self,
+        segment_index: usize,
+        segment: &ToolUseSegment,
+        _tools: &Entity<ToolWorkingSet>,
+        cx: &mut App,
+    ) {
+        if let Some(card) = segment.card.clone() {
+            if self.segments.len() < segment_index {
+                self.segments.push(RenderedMessageSegment::ToolUseCard(
+                    segment.status.clone(),
+                    card,
+                ))
+            }
+            return;
+        }
+        if self.segments.len() <= segment_index {
+            self.segments
+                .push(RenderedMessageSegment::ToolUseMarkdown(RenderedToolUse {
+                    label: cx.new(|cx| {
+                        Markdown::new("".into(), Some(self.language_registry.clone()), None, cx)
+                    }),
+                    input: cx.new(|cx| {
+                        Markdown::new("".into(), Some(self.language_registry.clone()), None, cx)
+                    }),
+                    output: cx.new(|cx| {
+                        Markdown::new("".into(), Some(self.language_registry.clone()), None, cx)
+                    }),
+                }))
+        }
+
+        dbg!(&self.segments);
+
+        let RenderedMessageSegment::ToolUseMarkdown(rendered) = &self.segments[segment_index]
+        else {
+            panic!()
+        };
+
+        // todo!()
+        // let ui_label = if let Some(tool) = tools.read(cx).tool(segment.name, cx) {
+        //     if segment.is_input_complete {
+        //         tool.ui_text(segment.input).into()
+        //     } else {
+        //         tool.still_streaming_ui_text(segment.input).into()
+        //     }
+        // } else {
+        //     format!("Unknown tool {:?}", segment.name).into()
+        // };
+
+        rendered.label.update(cx, |this, cx| {
+            this.replace(segment.name.clone(), cx);
+        });
+        rendered.input.update(cx, |this, cx| {
+            this.replace(
+                MarkdownCodeBlock {
+                    tag: "json",
+                    text: &serde_json::to_string_pretty(&segment.input).unwrap_or_default(),
+                }
+                .to_string(),
+                cx,
+            );
+        });
+
+        rendered.output.update(cx, |_this, _cx| {
+            match &segment.output {
+                Some(Ok(LanguageModelToolResultContent::Text(_text))) => {
+                    // todo!
+                }
+                Some(Ok(LanguageModelToolResultContent::Image(_image))) => {
+                    // todo!
+                }
+                Some(Err(_error)) => {
+                    // todo!
+                }
+                None => {
+                    // todo!
+                }
+            }
+        });
+    }
 }
 
+#[derive(Debug)]
 enum RenderedMessageSegment {
     Thinking {
         content: Entity<Markdown>,
         scroll_handle: ScrollHandle,
     },
     Text(Entity<Markdown>),
+    ToolUseCard(ToolUseStatus, AnyToolCard),
+    ToolUseMarkdown(RenderedToolUse),
 }
 
 fn parse_markdown(
@@ -765,7 +854,7 @@ struct EditingMessageState {
 
 impl ActiveThread {
     pub fn new(
-        thread: Entity<Thread>,
+        agent: Entity<ZedAgentThread>,
         thread_store: Entity<ThreadStore>,
         text_thread_store: Entity<TextThreadStore>,
         context_store: Entity<ContextStore>,
@@ -775,8 +864,8 @@ impl ActiveThread {
         cx: &mut Context<Self>,
     ) -> Self {
         let subscriptions = vec![
-            cx.observe(&thread, |_, _, cx| cx.notify()),
-            cx.subscribe_in(&thread, window, Self::handle_thread_event),
+            cx.observe(&agent, |_, _, cx| cx.notify()),
+            cx.subscribe_in(&agent, window, Self::handle_thread_event),
             cx.subscribe(&thread_store, Self::handle_rules_loading_error),
             cx.observe_global::<SettingsStore>(|_, cx| cx.notify()),
         ];
@@ -788,12 +877,14 @@ impl ActiveThread {
                     .unwrap()
             }
         });
+        let project = agent.read(cx).project().clone();
         let mut this = Self {
             language_registry,
             thread_store,
             text_thread_store,
             context_store,
-            thread: thread.clone(),
+            agent: agent.clone(),
+            project,
             workspace,
             save_thread_task: None,
             messages: Vec::new(),
@@ -816,7 +907,8 @@ impl ActiveThread {
             _load_edited_message_context_task: None,
         };
 
-        for message in thread.read(cx).messages().cloned().collect::<Vec<_>>() {
+        // todo! hold on to thread entity and get messages directly
+        for message in agent.read(cx).messages().cloned().collect::<Vec<_>>() {
             let rendered_message = RenderedMessage::from_segments(
                 &message.segments,
                 this.language_registry.clone(),
@@ -824,7 +916,7 @@ impl ActiveThread {
             );
             this.push_rendered_message(message.id, rendered_message);
 
-            for tool_use in thread.read(cx).tool_uses_for_message(message.id, cx) {
+            for tool_use in agent.read(cx).tool_uses_for_message(message.id, cx) {
                 this.render_tool_use_markdown(
                     tool_use.id.clone(),
                     tool_use.ui_text.clone(),
@@ -838,8 +930,8 @@ impl ActiveThread {
         this
     }
 
-    pub fn thread(&self) -> &Entity<Thread> {
-        &self.thread
+    pub fn agent(&self) -> &Entity<ZedAgentThread> {
+        &self.agent
     }
 
     pub fn is_empty(&self) -> bool {
@@ -847,17 +939,17 @@ impl ActiveThread {
     }
 
     pub fn summary<'a>(&'a self, cx: &'a App) -> &'a ThreadSummary {
-        self.thread.read(cx).summary()
+        self.agent.read(cx).summary()
     }
 
     pub fn regenerate_summary(&self, cx: &mut App) {
-        self.thread.update(cx, |thread, cx| thread.summarize(cx))
+        self.agent.update(cx, |agent, cx| agent.summarize(cx))
     }
 
     pub fn cancel_last_completion(&mut self, window: &mut Window, cx: &mut App) -> bool {
         self.last_error.take();
-        self.thread.update(cx, |thread, cx| {
-            thread.cancel_last_completion(Some(window.window_handle()), cx)
+        self.agent.update(cx, |agent, cx| {
+            agent.cancel_last_completion(Some(window.window_handle()), cx)
         })
     }
 
@@ -947,7 +1039,7 @@ impl ActiveThread {
 
     fn handle_thread_event(
         &mut self,
-        _thread: &Entity<Thread>,
+        _agent: &Entity<ZedAgentThread>,
         event: &ThreadEvent,
         window: &mut Window,
         cx: &mut Context<Self>,
@@ -965,10 +1057,8 @@ impl ActiveThread {
                 cx.notify();
             }
             ThreadEvent::CompletionCanceled => {
-                self.thread.update(cx, |thread, cx| {
-                    thread.project().update(cx, |project, cx| {
-                        project.set_agent_location(None, cx);
-                    })
+                self.project.update(cx, |project, cx| {
+                    project.set_agent_location(None, cx);
                 });
                 self.workspace
                     .update(cx, |workspace, cx| {
@@ -986,7 +1076,7 @@ impl ActiveThread {
             }
             ThreadEvent::Stopped(reason) => match reason {
                 Ok(StopReason::EndTurn | StopReason::MaxTokens) => {
-                    let used_tools = self.thread.read(cx).used_tools_since_last_user_message();
+                    let used_tools = self.agent.read(cx).used_tools_since_last_user_message(cx);
                     self.play_notification_sound(window, cx);
                     self.show_notification(
                         if used_tools {
@@ -1024,9 +1114,28 @@ impl ActiveThread {
                     rendered_message.append_thinking(text, cx);
                 }
             }
+            ThreadEvent::StreamedToolUse2 {
+                message_id,
+                segment_index,
+            } => {
+                if let Some(rendered_message) = self.rendered_messages_by_id.get_mut(&message_id) {
+                    self.agent.update(cx, |agent, cx| {
+                        if let Some(message) = agent.message(*message_id) {
+                            let MessageSegment::ToolUse(tool_use) =
+                                &message.segments[*segment_index]
+                            else {
+                                debug_panic!("segment index mismatch");
+                                return;
+                            };
+                            let tools = self.agent.read(cx).tools().clone();
+                            rendered_message.update_tool_call(*segment_index, tool_use, &tools, cx);
+                        }
+                    })
+                }
+            }
             ThreadEvent::MessageAdded(message_id) => {
-                if let Some(rendered_message) = self.thread.update(cx, |thread, cx| {
-                    thread.message(*message_id).map(|message| {
+                if let Some(rendered_message) = self.agent.update(cx, |agent, cx| {
+                    agent.message(*message_id).map(|message| {
                         RenderedMessage::from_segments(
                             &message.segments,
                             self.language_registry.clone(),
@@ -1042,8 +1151,8 @@ impl ActiveThread {
             }
             ThreadEvent::MessageEdited(message_id) => {
                 if let Some(index) = self.messages.iter().position(|id| id == message_id) {
-                    if let Some(rendered_message) = self.thread.update(cx, |thread, cx| {
-                        thread.message(*message_id).map(|message| {
+                    if let Some(rendered_message) = self.agent.update(cx, |agent, cx| {
+                        agent.message(*message_id).map(|message| {
                             let mut rendered_message = RenderedMessage {
                                 language_registry: self.language_registry.clone(),
                                 segments: Vec::with_capacity(message.segments.len()),
@@ -1100,7 +1209,7 @@ impl ActiveThread {
                         tool_use.id.clone(),
                         tool_use.ui_text.clone(),
                         &serde_json::to_string_pretty(&tool_use.input).unwrap_or_default(),
-                        self.thread
+                        self.agent
                             .read(cx)
                             .output_for_tool(&tool_use.id)
                             .map(|output| output.clone().into())
@@ -1120,7 +1229,7 @@ impl ActiveThread {
                     tool_use_id.clone(),
                     ui_text,
                     invalid_input_json,
-                    self.thread
+                    self.agent
                         .read(cx)
                         .output_for_tool(tool_use_id)
                         .map(|output| output.clone().into())
@@ -1136,7 +1245,7 @@ impl ActiveThread {
                     tool_use_id.clone(),
                     ui_text,
                     "",
-                    self.thread
+                    self.agent
                         .read(cx)
                         .output_for_tool(tool_use_id)
                         .map(|output| output.clone().into())
@@ -1185,7 +1294,7 @@ impl ActiveThread {
             return;
         }
 
-        let title = self.thread.read(cx).summary().unwrap_or("Agent Panel");
+        let title = self.agent.read(cx).summary().unwrap_or("Agent Panel");
 
         match AgentSettings::get_global(cx).notify_when_agent_waiting {
             NotifyWhenAgentWaiting::PrimaryScreen => {
@@ -1296,12 +1405,12 @@ impl ActiveThread {
     ///
     /// Only one task to save the thread will be in flight at a time.
     fn save_thread(&mut self, cx: &mut Context<Self>) {
-        let thread = self.thread.clone();
+        let agent = self.agent.clone();
         self.save_thread_task = Some(cx.spawn(async move |this, cx| {
             let task = this
                 .update(cx, |this, cx| {
                     this.thread_store
-                        .update(cx, |thread_store, cx| thread_store.save_thread(&thread, cx))
+                        .update(cx, |thread_store, cx| thread_store.save_thread(&agent, cx))
                 })
                 .ok();
 
@@ -1351,7 +1460,7 @@ impl ActiveThread {
                 Some(self.text_thread_store.downgrade()),
                 context_picker_menu_handle.clone(),
                 SuggestContextKind::File,
-                ModelUsageContext::Thread(self.thread.clone()),
+                ModelUsageContext::Thread(self.agent.clone()),
                 window,
                 cx,
             )
@@ -1403,13 +1512,13 @@ impl ActiveThread {
         cx.emit(ActiveThreadEvent::EditingMessageTokenCountChanged);
         state._update_token_count_task.take();
 
-        let Some(configured_model) = self.thread.read(cx).configured_model() else {
+        let Some(configured_model) = self.agent.read(cx).configured_model() else {
             state.last_estimated_token_count.take();
             return;
         };
 
         let editor = state.editor.clone();
-        let thread = self.thread.clone();
+        let agent = self.agent.clone();
         let message_id = *message_id;
 
         state._update_token_count_task = Some(cx.spawn(async move |this, cx| {
@@ -1421,7 +1530,7 @@ impl ActiveThread {
 
             let token_count = if let Some(task) = cx
                 .update(|cx| {
-                    let Some(message) = thread.read(cx).message(message_id) else {
+                    let Some(message) = agent.read(cx).message(message_id) else {
                         log::error!("Message that was being edited no longer exists");
                         return None;
                     };
@@ -1553,8 +1662,8 @@ impl ActiveThread {
         };
 
         let Some(model) = self
-            .thread
-            .update(cx, |thread, cx| thread.get_or_init_configured_model(cx))
+            .agent
+            .update(cx, |agent, cx| agent.get_or_init_configured_model(cx))
         else {
             return;
         };
@@ -1568,12 +1677,13 @@ impl ActiveThread {
 
         let creases = state.editor.update(cx, extract_message_creases);
 
-        let new_context = self
-            .context_store
-            .read(cx)
-            .new_context_for_thread(self.thread.read(cx), Some(message_id));
+        let new_context = self.context_store.read(cx).new_context_for_thread(
+            self.agent.read(cx),
+            Some(message_id),
+            cx,
+        );
 
-        let project = self.thread.read(cx).project().clone();
+        let project = self.project.clone();
         let prompt_store = self.thread_store.read(cx).prompt_store().clone();
 
         let git_store = project.read(cx).git_store().clone();
@@ -1586,32 +1696,24 @@ impl ActiveThread {
                     futures::future::join(load_context_task, checkpoint).await;
                 let _ = this
                     .update_in(cx, |this, window, cx| {
-                        this.thread.update(cx, |thread, cx| {
-                            thread.edit_message(
-                                message_id,
-                                Role::User,
-                                vec![MessageSegment::Text(edited_text)],
-                                creases,
-                                Some(context.loaded_context),
-                                checkpoint.ok(),
-                                cx,
-                            );
-                            for message_id in this.messages_after(message_id) {
-                                thread.delete_message(*message_id, cx);
-                            }
-                        });
-
-                        this.thread.update(cx, |thread, cx| {
-                            thread.advance_prompt_id();
-                            thread.cancel_last_completion(Some(window.window_handle()), cx);
-                            thread.send_to_model(
+                        this.agent.update(cx, |agent, cx| {
+                            agent.truncate(message_id, cx);
+                            agent.send_message(
+                                UserMessageParams {
+                                    text: edited_text,
+                                    creases,
+                                    checkpoint: checkpoint.ok(),
+                                    context,
+                                },
                                 model.model,
-                                CompletionIntent::UserPrompt,
                                 Some(window.window_handle()),
                                 cx,
                             );
                         });
+
+                        // todo! do we need this?
                         this._load_edited_message_context_task = None;
+
                         cx.notify();
                     })
                     .log_err();
@@ -1626,14 +1728,6 @@ impl ActiveThread {
         }
     }
 
-    fn messages_after(&self, message_id: MessageId) -> &[MessageId] {
-        self.messages
-            .iter()
-            .position(|id| *id == message_id)
-            .map(|index| &self.messages[index + 1..])
-            .unwrap_or(&[])
-    }
-
     fn handle_cancel_click(&mut self, _: &ClickEvent, window: &mut Window, cx: &mut Context<Self>) {
         self.cancel_editing_message(&menu::Cancel, window, cx);
     }
@@ -1654,7 +1748,7 @@ impl ActiveThread {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        let report = self.thread.update(cx, |thread, cx| {
+        let report = self.agent.update(cx, |thread, cx| {
             thread.report_message_feedback(message_id, feedback, cx)
         });
 
@@ -1713,17 +1807,17 @@ impl ActiveThread {
             return;
         };
 
-        let report_task = self.thread.update(cx, |thread, cx| {
+        let report_task = self.agent.update(cx, |thread, cx| {
             thread.report_message_feedback(message_id, ThreadFeedback::Negative, cx)
         });
 
         let comments = editor.read(cx).text(cx);
         if !comments.is_empty() {
-            let thread_id = self.thread.read(cx).id().clone();
+            let thread_id = self.agent.read(cx).id().clone();
             let comments_value = String::from(comments.as_str());
 
             let message_content = self
-                .thread
+                .agent
                 .read(cx)
                 .message(message_id)
                 .map(|msg| msg.to_string())
@@ -1799,45 +1893,42 @@ impl ActiveThread {
     fn render_message(&self, ix: usize, window: &mut Window, cx: &mut Context<Self>) -> AnyElement {
         let message_id = self.messages[ix];
         let workspace = self.workspace.clone();
-        let thread = self.thread.read(cx);
+        let agent = self.agent.read(cx);
 
         let is_first_message = ix == 0;
         let is_last_message = ix == self.messages.len() - 1;
 
-        let Some(message) = thread.message(message_id) else {
+        let Some(message) = agent.message(message_id) else {
             return Empty.into_any();
         };
 
-        let is_generating = thread.is_generating();
-        let is_generating_stale = thread.is_generation_stale().unwrap_or(false);
+        let is_generating = agent.is_generating();
+        let is_generating_stale = agent.is_generation_stale().unwrap_or(false);
 
         let loading_dots = (is_generating && is_last_message).then(|| {
             h_flex()
                 .h_8()
                 .my_3()
                 .mx_5()
-                .when(is_generating_stale || message.is_hidden, |this| {
+                .when(is_generating_stale, |this| {
                     this.child(AnimatedLabel::new("").size(LabelSize::Small))
                 })
         });
 
-        if message.is_hidden {
-            return div().children(loading_dots).into_any();
-        }
-
         let Some(rendered_message) = self.rendered_messages_by_id.get(&message_id) else {
             return Empty.into_any();
         };
 
         // Get all the data we need from thread before we start using it in closures
-        let checkpoint = thread.checkpoint_for_message(message_id);
-        let configured_model = thread.configured_model().map(|m| m.model);
-        let added_context = thread
+        let checkpoint = agent.checkpoint_for_message(message_id);
+        let configured_model = agent.configured_model().map(|m| m.model);
+        let added_context = agent
             .context_for_message(message_id)
             .map(|context| AddedContext::new_attached(context, configured_model.as_ref(), cx))
             .collect::<Vec<_>>();
 
-        let tool_uses = thread.tool_uses_for_message(message_id, cx);
+        // let tool_uses = message.segments
+        let tool_uses = agent.tool_uses_for_message(message_id, cx);
         let has_tool_uses = !tool_uses.is_empty();
 
         let editing_message_state = self
@@ -1856,11 +1947,11 @@ impl ActiveThread {
             .icon_color(Color::Ignored)
             .tooltip(Tooltip::text("Open Thread as Markdown"))
             .on_click({
-                let thread = self.thread.clone();
+                let agent = self.agent.clone();
                 let workspace = self.workspace.clone();
                 move |_, window, cx| {
                     if let Some(workspace) = workspace.upgrade() {
-                        open_active_thread_as_markdown(thread.clone(), workspace, window, cx)
+                        open_active_thread_as_markdown(agent.clone(), workspace, window, cx)
                             .detach_and_log_err(cx);
                     }
                 }
@@ -1877,7 +1968,7 @@ impl ActiveThread {
         // For all items that should be aligned with the LLM's response.
         const RESPONSE_PADDING_X: Pixels = px(19.);
 
-        let show_feedback = thread.is_turn_end(ix);
+        let show_feedback = self.agent.read(cx).is_turn_end(ix);
         let feedback_container = h_flex()
             .group("feedback_container")
             .mt_1()
@@ -1889,7 +1980,7 @@ impl ActiveThread {
             .gap_1p5()
             .flex_wrap()
             .justify_end();
-        let feedback_items = match self.thread.read(cx).message_feedback(message_id) {
+        let feedback_items = match self.agent.read(cx).message_feedback(message_id) {
             Some(feedback) => feedback_container
                 .child(
                     div().visible_on_hover("feedback_container").child(
@@ -1995,6 +2086,9 @@ impl ActiveThread {
         };
 
         let message_is_empty = message.should_display_content();
+        let message_is_ui_only = message.ui_only;
+        let message_creases = message.creases.clone();
+        let role = message.role;
         let has_content = !message_is_empty || !added_context.is_empty();
 
         let message_content = has_content.then(|| {
@@ -2037,10 +2131,10 @@ impl ActiveThread {
             }
         });
 
-        let styled_message = if message.ui_only {
+        let styled_message = if message_is_ui_only {
             self.render_ui_notification(message_content, ix, cx)
         } else {
-            match message.role {
+            match role {
                 Role::User => {
                     let colors = cx.theme().colors();
                     v_flex()
@@ -2145,10 +2239,9 @@ impl ActiveThread {
                                         }),
                                 )
                                 .on_click(cx.listener({
-                                    let message_creases = message.creases.clone();
                                     move |this, _, window, cx| {
                                         if let Some(message_text) =
-                                            this.thread.read(cx).message(message_id).and_then(|message| {
+                                            this.agent.read(cx).message(message_id).and_then(|message| {
                                                 message.segments.first().and_then(|segment| {
                                                     match segment {
                                                         MessageSegment::Text(message_text) => {
@@ -2219,7 +2312,7 @@ impl ActiveThread {
                     let mut is_pending = false;
                     let mut error = None;
                     if let Some(last_restore_checkpoint) =
-                        self.thread.read(cx).last_restore_checkpoint()
+                        self.agent.read(cx).last_restore_checkpoint()
                     {
                         if last_restore_checkpoint.message_id() == message_id {
                             match last_restore_checkpoint {
@@ -2248,7 +2341,7 @@ impl ActiveThread {
                             .label_size(LabelSize::XSmall)
                             .disabled(is_pending)
                             .on_click(cx.listener(move |this, _, _window, cx| {
-                                this.thread.update(cx, |thread, cx| {
+                                this.agent.update(cx, |thread, cx| {
                                     thread
                                         .restore_checkpoint(checkpoint.clone(), cx)
                                         .detach_and_log_err(cx);
@@ -2382,11 +2475,11 @@ impl ActiveThread {
         rendered_message: &RenderedMessage,
         has_tool_uses: bool,
         workspace: WeakEntity<Workspace>,
-        window: &Window,
-        cx: &Context<Self>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
     ) -> impl IntoElement {
         let is_last_message = self.messages.last() == Some(&message_id);
-        let is_generating = self.thread.read(cx).is_generating();
+        let is_generating = self.agent.read(cx).is_generating();
         let pending_thinking_segment_index = if is_generating && is_last_message && !has_tool_uses {
             rendered_message
                 .segments
@@ -2400,7 +2493,7 @@ impl ActiveThread {
         };
 
         let message_role = self
-            .thread
+            .agent
             .read(cx)
             .message(message_id)
             .map(|m| m.role)
@@ -2515,6 +2608,23 @@ impl ActiveThread {
                                 }))
                                 .into_any_element()
                         }
+                        RenderedMessageSegment::ToolUseCard(status, card) => {
+                            card.render(status, window, workspace.clone(), cx)
+                        }
+                        RenderedMessageSegment::ToolUseMarkdown(rendered) => v_flex()
+                            .child(MarkdownElement::new(
+                                rendered.label.clone(),
+                                default_markdown_style(window, cx),
+                            ))
+                            .child(MarkdownElement::new(
+                                rendered.input.clone(),
+                                default_markdown_style(window, cx),
+                            ))
+                            .child(MarkdownElement::new(
+                                rendered.output.clone(),
+                                default_markdown_style(window, cx),
+                            ))
+                            .into_any(), // todo!()
                     },
                 ),
             )
@@ -2784,7 +2894,7 @@ impl ActiveThread {
         workspace: WeakEntity<Workspace>,
         cx: &mut Context<Self>,
     ) -> impl IntoElement + use<> {
-        if let Some(card) = self.thread.read(cx).card_for_tool(&tool_use.id) {
+        if let Some(card) = self.agent.read(cx).card_for_tool(&tool_use.id) {
             return card.render(&tool_use.status, window, workspace, cx);
         }
 
@@ -3265,7 +3375,7 @@ impl ActiveThread {
     }
 
     fn render_rules_item(&self, cx: &Context<Self>) -> AnyElement {
-        let project_context = self.thread.read(cx).project_context();
+        let project_context = self.agent.read(cx).project_context();
         let project_context = project_context.borrow();
         let Some(project_context) = project_context.as_ref() else {
             return div().into_any();
@@ -3389,12 +3499,12 @@ impl ActiveThread {
         cx: &mut Context<Self>,
     ) {
         if let Some(PendingToolUseStatus::NeedsConfirmation(c)) = self
-            .thread
+            .agent
             .read(cx)
             .pending_tool(&tool_use_id)
             .map(|tool_use| tool_use.status.clone())
         {
-            self.thread.update(cx, |thread, cx| {
+            self.agent.update(cx, |thread, cx| {
                 if let Some(configured) = thread.get_or_init_configured_model(cx) {
                     thread.run_tool(
                         c.tool_use_id.clone(),
@@ -3420,13 +3530,13 @@ impl ActiveThread {
         cx: &mut Context<Self>,
     ) {
         let window_handle = window.window_handle();
-        self.thread.update(cx, |thread, cx| {
+        self.agent.update(cx, |thread, cx| {
             thread.deny_tool_use(tool_use_id, tool_name, Some(window_handle), cx);
         });
     }
 
     fn handle_open_rules(&mut self, _: &ClickEvent, window: &mut Window, cx: &mut Context<Self>) {
-        let project_context = self.thread.read(cx).project_context();
+        let project_context = self.agent.read(cx).project_context();
         let project_context = project_context.borrow();
         let Some(project_context) = project_context.as_ref() else {
             return;
@@ -3588,7 +3698,7 @@ impl Render for ActiveThread {
 }
 
 pub(crate) fn open_active_thread_as_markdown(
-    thread: Entity<Thread>,
+    agent: Entity<ZedAgentThread>,
     workspace: Entity<Workspace>,
     window: &mut Window,
     cx: &mut App,
@@ -3603,7 +3713,7 @@ pub(crate) fn open_active_thread_as_markdown(
         let markdown_language = markdown_language_task.await?;
 
         workspace.update_in(cx, |workspace, window, cx| {
-            let thread = thread.read(cx);
+            let thread = agent.read(cx);
             let markdown = thread.to_markdown(cx)?;
             let thread_summary = thread.summary().or_default().to_string();
 
@@ -3692,7 +3802,7 @@ pub(crate) fn open_context(
         AgentContextHandle::Thread(thread_context) => workspace.update(cx, |workspace, cx| {
             if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
                 panel.update(cx, |panel, cx| {
-                    panel.open_thread(thread_context.thread.clone(), window, cx);
+                    panel.open_thread(thread_context.agent.clone(), window, cx);
                 });
             }
         }),
@@ -3779,7 +3889,9 @@ fn open_editor_at_position(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use agent::{MessageSegment, context::ContextLoadResult, thread_store};
+    use agent::{
+        MessageSegment, context::ContextLoadResult, thread::UserMessageParams, thread_store,
+    };
     use assistant_tool::{ToolRegistry, ToolWorkingSet};
     use editor::EditorSettings;
     use fs::FakeFs;
@@ -3794,6 +3906,7 @@ mod tests {
     use settings::SettingsStore;
     use util::path;
     use workspace::CollaboratorId;
+    use zed_llm_client::CompletionIntent;
 
     #[gpui::test]
     async fn test_agent_is_unfollowed_after_cancelling_completion(cx: &mut TestAppContext) {
@@ -3810,13 +3923,12 @@ mod tests {
 
         // Insert user message without any context (empty context vector)
         thread.update(cx, |thread, cx| {
-            thread.insert_user_message(
+            thread.send_message(
                 "What is the best way to learn Rust?",
-                ContextLoadResult::default(),
+                model.clone(),
                 None,
-                vec![],
                 cx,
-            );
+            )
         });
 
         // Stream response to user message
@@ -3857,7 +3969,7 @@ mod tests {
                 registry.set_default_model(
                     Some(ConfiguredModel {
                         provider: Arc::new(FakeLanguageModelProvider),
-                        model,
+                        model: model.clone(),
                     }),
                     cx,
                 );
@@ -3871,15 +3983,19 @@ mod tests {
             context: None,
         }];
 
-        let message = thread.update(cx, |thread, cx| {
-            let message_id = thread.insert_user_message(
-                "Tell me about @foo.txt",
-                ContextLoadResult::default(),
+        let message = thread.update(cx, |agent, cx| {
+            let message_id = agent.send_message(
+                UserMessageParams {
+                    text: "Tell me about @foo.txt".to_string(),
+                    creases,
+                    checkpoint: None,
+                    context: ContextLoadResult::default(),
+                },
+                model.clone(),
                 None,
-                creases,
                 cx,
             );
-            thread.message(message_id).cloned().unwrap()
+            agent.message(message_id).cloned().unwrap()
         });
 
         active_thread.update_in(cx, |active_thread, window, cx| {
@@ -3971,20 +4087,8 @@ mod tests {
 
         // Insert a user message and start streaming a response
         let message = thread.update(cx, |thread, cx| {
-            let message_id = thread.insert_user_message(
-                "Hello, how are you?",
-                ContextLoadResult::default(),
-                None,
-                vec![],
-                cx,
-            );
-            thread.advance_prompt_id();
-            thread.send_to_model(
-                model.clone(),
-                CompletionIntent::UserPrompt,
-                cx.active_window(),
-                cx,
-            );
+            let message_id =
+                thread.send_message("Hello, how are you?", model.clone(), cx.active_window(), cx);
             thread.message(message_id).cloned().unwrap()
         });
 
@@ -4071,7 +4175,7 @@ mod tests {
         &mut VisualTestContext,
         Entity<ActiveThread>,
         Entity<Workspace>,
-        Entity<Thread>,
+        Entity<ZedAgentThread>,
         Arc<dyn LanguageModel>,
     ) {
         let (workspace, cx) =

crates/agent_ui/src/agent_configuration/configure_context_server_modal.rs

@@ -180,7 +180,7 @@ impl ConfigurationSource {
 }
 
 fn context_server_input(existing: Option<(ContextServerId, ContextServerCommand)>) -> String {
-    let (name, path, args, env) = match existing {
+    let (name, command, args, env) = match existing {
         Some((id, cmd)) => {
             let args = serde_json::to_string(&cmd.args).unwrap();
             let env = serde_json::to_string(&cmd.env.unwrap_or_default()).unwrap();
@@ -198,14 +198,12 @@ fn context_server_input(existing: Option<(ContextServerId, ContextServerCommand)
         r#"{{
   /// The name of your MCP server
   "{name}": {{
-    "command": {{
-      /// The path to the executable
-      "path": "{path}",
-      /// The arguments to pass to the executable
-      "args": {args},
-      /// The environment variables to set for the executable
-      "env": {env}
-    }}
+    /// The command which runs the MCP server
+    "command": "{command}",
+    /// The arguments to pass to the MCP server
+    "args": {args},
+    /// The environment variables to set
+    "env": {env}
   }}
 }}"#
     )
@@ -439,8 +437,7 @@ fn parse_input(text: &str) -> Result<(ContextServerId, ContextServerCommand)> {
     let object = value.as_object().context("Expected object")?;
     anyhow::ensure!(object.len() == 1, "Expected exactly one key-value pair");
     let (context_server_name, value) = object.into_iter().next().unwrap();
-    let command = value.get("command").context("Expected command")?;
-    let command: ContextServerCommand = serde_json::from_value(command.clone())?;
+    let command: ContextServerCommand = serde_json::from_value(value.clone())?;
     Ok((ContextServerId(context_server_name.clone().into()), command))
 }
 

crates/agent_ui/src/agent_diff.rs

@@ -1,7 +1,8 @@
 use crate::{Keep, KeepAll, OpenAgentDiff, Reject, RejectAll};
-use agent::{Thread, ThreadEvent};
+use agent::{ThreadEvent, ZedAgentThread};
 use agent_settings::AgentSettings;
 use anyhow::Result;
+use assistant_tool::ActionLog;
 use buffer_diff::DiffHunkStatus;
 use collections::{HashMap, HashSet};
 use editor::{
@@ -41,7 +42,8 @@ use zed_actions::assistant::ToggleFocus;
 pub struct AgentDiffPane {
     multibuffer: Entity<MultiBuffer>,
     editor: Entity<Editor>,
-    thread: Entity<Thread>,
+    agent: Entity<ZedAgentThread>,
+    action_log: Entity<ActionLog>,
     focus_handle: FocusHandle,
     workspace: WeakEntity<Workspace>,
     title: SharedString,
@@ -50,70 +52,71 @@ pub struct AgentDiffPane {
 
 impl AgentDiffPane {
     pub fn deploy(
-        thread: Entity<Thread>,
+        agent: Entity<ZedAgentThread>,
         workspace: WeakEntity<Workspace>,
         window: &mut Window,
         cx: &mut App,
     ) -> Result<Entity<Self>> {
         workspace.update(cx, |workspace, cx| {
-            Self::deploy_in_workspace(thread, workspace, window, cx)
+            Self::deploy_in_workspace(agent, workspace, window, cx)
         })
     }
 
     pub fn deploy_in_workspace(
-        thread: Entity<Thread>,
+        agent: Entity<ZedAgentThread>,
         workspace: &mut Workspace,
         window: &mut Window,
         cx: &mut Context<Workspace>,
     ) -> Entity<Self> {
         let existing_diff = workspace
             .items_of_type::<AgentDiffPane>(cx)
-            .find(|diff| diff.read(cx).thread == thread);
+            .find(|diff| diff.read(cx).agent == agent);
         if let Some(existing_diff) = existing_diff {
             workspace.activate_item(&existing_diff, true, true, window, cx);
             existing_diff
         } else {
-            let agent_diff = cx
-                .new(|cx| AgentDiffPane::new(thread.clone(), workspace.weak_handle(), window, cx));
+            let agent_diff =
+                cx.new(|cx| AgentDiffPane::new(agent.clone(), workspace.weak_handle(), window, cx));
             workspace.add_item_to_center(Box::new(agent_diff.clone()), window, cx);
             agent_diff
         }
     }
 
     pub fn new(
-        thread: Entity<Thread>,
+        agent: Entity<ZedAgentThread>,
         workspace: WeakEntity<Workspace>,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Self {
         let focus_handle = cx.focus_handle();
         let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
+        let action_log = agent.read(cx).action_log();
+        let project = agent.read(cx).project().clone();
 
-        let project = thread.read(cx).project().clone();
         let editor = cx.new(|cx| {
             let mut editor =
                 Editor::for_multibuffer(multibuffer.clone(), Some(project.clone()), window, cx);
             editor.disable_inline_diagnostics();
             editor.set_expand_all_diff_hunks(cx);
-            editor.set_render_diff_hunk_controls(diff_hunk_controls(&thread), cx);
+            editor.set_render_diff_hunk_controls(diff_hunk_controls(&action_log), cx);
             editor.register_addon(AgentDiffAddon);
             editor
         });
 
-        let action_log = thread.read(cx).action_log().clone();
         let mut this = Self {
             _subscriptions: vec![
                 cx.observe_in(&action_log, window, |this, _action_log, window, cx| {
                     this.update_excerpts(window, cx)
                 }),
-                cx.subscribe(&thread, |this, _thread, event, cx| {
+                cx.subscribe(&agent, |this, _thread, event, cx| {
                     this.handle_thread_event(event, cx)
                 }),
             ],
             title: SharedString::default(),
+            action_log,
             multibuffer,
             editor,
-            thread,
+            agent,
             focus_handle,
             workspace,
         };
@@ -123,8 +126,8 @@ impl AgentDiffPane {
     }
 
     fn update_excerpts(&mut self, window: &mut Window, cx: &mut Context<Self>) {
-        let thread = self.thread.read(cx);
-        let changed_buffers = thread.action_log().read(cx).changed_buffers(cx);
+        let agent = self.agent.read(cx);
+        let changed_buffers = agent.action_log().read(cx).changed_buffers(cx);
         let mut paths_to_delete = self.multibuffer.read(cx).paths().collect::<HashSet<_>>();
 
         for (buffer, diff_handle) in changed_buffers {
@@ -211,7 +214,7 @@ impl AgentDiffPane {
     }
 
     fn update_title(&mut self, cx: &mut Context<Self>) {
-        let new_title = self.thread.read(cx).summary().unwrap_or("Agent Changes");
+        let new_title = self.agent.read(cx).summary().unwrap_or("Agent Changes");
         if new_title != self.title {
             self.title = new_title;
             cx.emit(EditorEvent::TitleChanged);
@@ -248,14 +251,14 @@ impl AgentDiffPane {
     fn keep(&mut self, _: &Keep, window: &mut Window, cx: &mut Context<Self>) {
         self.editor.update(cx, |editor, cx| {
             let snapshot = editor.buffer().read(cx).snapshot(cx);
-            keep_edits_in_selection(editor, &snapshot, &self.thread, window, cx);
+            keep_edits_in_selection(editor, &snapshot, &self.action_log, window, cx);
         });
     }
 
     fn reject(&mut self, _: &Reject, window: &mut Window, cx: &mut Context<Self>) {
         self.editor.update(cx, |editor, cx| {
             let snapshot = editor.buffer().read(cx).snapshot(cx);
-            reject_edits_in_selection(editor, &snapshot, &self.thread, window, cx);
+            reject_edits_in_selection(editor, &snapshot, &self.action_log, window, cx);
         });
     }
 
@@ -265,7 +268,7 @@ impl AgentDiffPane {
             reject_edits_in_ranges(
                 editor,
                 &snapshot,
-                &self.thread,
+                &self.action_log,
                 vec![editor::Anchor::min()..editor::Anchor::max()],
                 window,
                 cx,
@@ -274,15 +277,15 @@ impl AgentDiffPane {
     }
 
     fn keep_all(&mut self, _: &KeepAll, _window: &mut Window, cx: &mut Context<Self>) {
-        self.thread
-            .update(cx, |thread, cx| thread.keep_all_edits(cx));
+        self.action_log
+            .update(cx, |action_log, cx| action_log.keep_all_edits(cx));
     }
 }
 
 fn keep_edits_in_selection(
     editor: &mut Editor,
     buffer_snapshot: &MultiBufferSnapshot,
-    thread: &Entity<Thread>,
+    action_log: &Entity<ActionLog>,
     window: &mut Window,
     cx: &mut Context<Editor>,
 ) {
@@ -291,13 +294,13 @@ fn keep_edits_in_selection(
         .disjoint_anchor_ranges()
         .collect::<Vec<_>>();
 
-    keep_edits_in_ranges(editor, buffer_snapshot, &thread, ranges, window, cx)
+    keep_edits_in_ranges(editor, buffer_snapshot, &action_log, ranges, window, cx)
 }
 
 fn reject_edits_in_selection(
     editor: &mut Editor,
     buffer_snapshot: &MultiBufferSnapshot,
-    thread: &Entity<Thread>,
+    action_log: &Entity<ActionLog>,
     window: &mut Window,
     cx: &mut Context<Editor>,
 ) {
@@ -305,13 +308,13 @@ fn reject_edits_in_selection(
         .selections
         .disjoint_anchor_ranges()
         .collect::<Vec<_>>();
-    reject_edits_in_ranges(editor, buffer_snapshot, &thread, ranges, window, cx)
+    reject_edits_in_ranges(editor, buffer_snapshot, &action_log, ranges, window, cx)
 }
 
 fn keep_edits_in_ranges(
     editor: &mut Editor,
     buffer_snapshot: &MultiBufferSnapshot,
-    thread: &Entity<Thread>,
+    action_log: &Entity<ActionLog>,
     ranges: Vec<Range<editor::Anchor>>,
     window: &mut Window,
     cx: &mut Context<Editor>,
@@ -326,8 +329,8 @@ fn keep_edits_in_ranges(
     for hunk in &diff_hunks_in_ranges {
         let buffer = multibuffer.read(cx).buffer(hunk.buffer_id);
         if let Some(buffer) = buffer {
-            thread.update(cx, |thread, cx| {
-                thread.keep_edits_in_range(buffer, hunk.buffer_range.clone(), cx)
+            action_log.update(cx, |action_log, cx| {
+                action_log.keep_edits_in_range(buffer, hunk.buffer_range.clone(), cx)
             });
         }
     }
@@ -336,7 +339,7 @@ fn keep_edits_in_ranges(
 fn reject_edits_in_ranges(
     editor: &mut Editor,
     buffer_snapshot: &MultiBufferSnapshot,
-    thread: &Entity<Thread>,
+    action_log: &Entity<ActionLog>,
     ranges: Vec<Range<editor::Anchor>>,
     window: &mut Window,
     cx: &mut Context<Editor>,
@@ -361,9 +364,9 @@ fn reject_edits_in_ranges(
     }
 
     for (buffer, ranges) in ranges_by_buffer {
-        thread
-            .update(cx, |thread, cx| {
-                thread.reject_edits_in_ranges(buffer, ranges, cx)
+        action_log
+            .update(cx, |action_log, cx| {
+                action_log.reject_edits_in_ranges(buffer, ranges, cx)
             })
             .detach_and_log_err(cx);
     }
@@ -461,7 +464,7 @@ impl Item for AgentDiffPane {
     }
 
     fn tab_content(&self, params: TabContentParams, _window: &Window, cx: &App) -> AnyElement {
-        let summary = self.thread.read(cx).summary().unwrap_or("Agent Changes");
+        let summary = self.agent.read(cx).summary().or_default();
         Label::new(format!("Review: {}", summary))
             .color(if params.selected {
                 Color::Default
@@ -511,7 +514,7 @@ impl Item for AgentDiffPane {
     where
         Self: Sized,
     {
-        Some(cx.new(|cx| Self::new(self.thread.clone(), self.workspace.clone(), window, cx)))
+        Some(cx.new(|cx| Self::new(self.agent.clone(), self.workspace.clone(), window, cx)))
     }
 
     fn is_dirty(&self, cx: &App) -> bool {
@@ -641,8 +644,8 @@ impl Render for AgentDiffPane {
     }
 }
 
-fn diff_hunk_controls(thread: &Entity<Thread>) -> editor::RenderDiffHunkControlsFn {
-    let thread = thread.clone();
+fn diff_hunk_controls(action_log: &Entity<ActionLog>) -> editor::RenderDiffHunkControlsFn {
+    let action_log = action_log.clone();
 
     Arc::new(
         move |row,
@@ -660,7 +663,7 @@ fn diff_hunk_controls(thread: &Entity<Thread>) -> editor::RenderDiffHunkControls
                     hunk_range,
                     is_created_file,
                     line_height,
-                    &thread,
+                    &action_log,
                     editor,
                     window,
                     cx,
@@ -676,7 +679,7 @@ fn render_diff_hunk_controls(
     hunk_range: Range<editor::Anchor>,
     is_created_file: bool,
     line_height: Pixels,
-    thread: &Entity<Thread>,
+    action_log: &Entity<ActionLog>,
     editor: &Entity<Editor>,
     window: &mut Window,
     cx: &mut App,
@@ -711,14 +714,14 @@ fn render_diff_hunk_controls(
                 )
                 .on_click({
                     let editor = editor.clone();
-                    let thread = thread.clone();
+                    let action_log = action_log.clone();
                     move |_event, window, cx| {
                         editor.update(cx, |editor, cx| {
                             let snapshot = editor.buffer().read(cx).snapshot(cx);
                             reject_edits_in_ranges(
                                 editor,
                                 &snapshot,
-                                &thread,
+                                &action_log,
                                 vec![hunk_range.start..hunk_range.start],
                                 window,
                                 cx,
@@ -733,14 +736,14 @@ fn render_diff_hunk_controls(
                 )
                 .on_click({
                     let editor = editor.clone();
-                    let thread = thread.clone();
+                    let action_log = action_log.clone();
                     move |_event, window, cx| {
                         editor.update(cx, |editor, cx| {
                             let snapshot = editor.buffer().read(cx).snapshot(cx);
                             keep_edits_in_ranges(
                                 editor,
                                 &snapshot,
-                                &thread,
+                                &action_log,
                                 vec![hunk_range.start..hunk_range.start],
                                 window,
                                 cx,
@@ -1114,7 +1117,7 @@ impl Render for AgentDiffToolbar {
 
                 let has_pending_edit_tool_use = agent_diff
                     .read(cx)
-                    .thread
+                    .agent
                     .read(cx)
                     .has_pending_edit_tool_uses();
 
@@ -1187,7 +1190,7 @@ pub enum EditorState {
 }
 
 struct WorkspaceThread {
-    thread: WeakEntity<Thread>,
+    agent: WeakEntity<ZedAgentThread>,
     _thread_subscriptions: [Subscription; 2],
     singleton_editors: HashMap<WeakEntity<Buffer>, HashMap<WeakEntity<Editor>, Subscription>>,
     _settings_subscription: Subscription,
@@ -1212,7 +1215,7 @@ impl AgentDiff {
 
     pub fn set_active_thread(
         workspace: &WeakEntity<Workspace>,
-        thread: &Entity<Thread>,
+        thread: &Entity<ZedAgentThread>,
         window: &mut Window,
         cx: &mut App,
     ) {
@@ -1224,11 +1227,11 @@ impl AgentDiff {
     fn register_active_thread_impl(
         &mut self,
         workspace: &WeakEntity<Workspace>,
-        thread: &Entity<Thread>,
+        agent: &Entity<ZedAgentThread>,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        let action_log = thread.read(cx).action_log().clone();
+        let action_log = agent.read(cx).action_log().clone();
 
         let action_log_subscription = cx.observe_in(&action_log, window, {
             let workspace = workspace.clone();
@@ -1237,7 +1240,7 @@ impl AgentDiff {
             }
         });
 
-        let thread_subscription = cx.subscribe_in(&thread, window, {
+        let thread_subscription = cx.subscribe_in(&agent, window, {
             let workspace = workspace.clone();
             move |this, _thread, event, window, cx| {
                 this.handle_thread_event(&workspace, event, window, cx)
@@ -1246,7 +1249,7 @@ impl AgentDiff {
 
         if let Some(workspace_thread) = self.workspace_threads.get_mut(&workspace) {
             // replace thread and action log subscription, but keep editors
-            workspace_thread.thread = thread.downgrade();
+            workspace_thread.agent = agent.downgrade();
             workspace_thread._thread_subscriptions = [action_log_subscription, thread_subscription];
             self.update_reviewing_editors(&workspace, window, cx);
             return;
@@ -1271,7 +1274,7 @@ impl AgentDiff {
         self.workspace_threads.insert(
             workspace.clone(),
             WorkspaceThread {
-                thread: thread.downgrade(),
+                agent: agent.downgrade(),
                 _thread_subscriptions: [action_log_subscription, thread_subscription],
                 singleton_editors: HashMap::default(),
                 _settings_subscription: settings_subscription,
@@ -1319,7 +1322,7 @@ impl AgentDiff {
 
     fn register_review_action<T: Action>(
         workspace: &mut Workspace,
-        review: impl Fn(&Entity<Editor>, &Entity<Thread>, &mut Window, &mut App) -> PostReviewState
+        review: impl Fn(&Entity<Editor>, &Entity<ZedAgentThread>, &mut Window, &mut App) -> PostReviewState
         + 'static,
         this: &Entity<AgentDiff>,
     ) {
@@ -1362,6 +1365,7 @@ impl AgentDiff {
             | ThreadEvent::StreamedAssistantText(_, _)
             | ThreadEvent::StreamedAssistantThinking(_, _)
             | ThreadEvent::StreamedToolUse { .. }
+            | ThreadEvent::StreamedToolUse2 { .. }
             | ThreadEvent::InvalidToolInput { .. }
             | ThreadEvent::MissingToolUse { .. }
             | ThreadEvent::MessageAdded(_)
@@ -1481,11 +1485,11 @@ impl AgentDiff {
             return;
         };
 
-        let Some(thread) = workspace_thread.thread.upgrade() else {
+        let Some(agent) = workspace_thread.agent.upgrade() else {
             return;
         };
 
-        let action_log = thread.read(cx).action_log();
+        let action_log = agent.read(cx).action_log();
         let changed_buffers = action_log.read(cx).changed_buffers(cx);
 
         let mut unaffected = self.reviewing_editors.clone();
@@ -1510,7 +1514,7 @@ impl AgentDiff {
                     multibuffer.add_diff(diff_handle.clone(), cx);
                 });
 
-                let new_state = if thread.read(cx).is_generating() {
+                let new_state = if agent.read(cx).is_generating() {
                     EditorState::Generating
                 } else {
                     EditorState::Reviewing
@@ -1523,7 +1527,7 @@ impl AgentDiff {
                 if previous_state.is_none() {
                     editor.update(cx, |editor, cx| {
                         editor.start_temporary_diff_override();
-                        editor.set_render_diff_hunk_controls(diff_hunk_controls(&thread), cx);
+                        editor.set_render_diff_hunk_controls(diff_hunk_controls(&action_log), cx);
                         editor.set_expand_all_diff_hunks(cx);
                         editor.register_addon(EditorAgentDiffAddon);
                     });
@@ -1591,22 +1595,22 @@ impl AgentDiff {
             return;
         };
 
-        let Some(WorkspaceThread { thread, .. }) =
+        let Some(WorkspaceThread { agent, .. }) =
             self.workspace_threads.get(&workspace.downgrade())
         else {
             return;
         };
 
-        let Some(thread) = thread.upgrade() else {
+        let Some(agent) = agent.upgrade() else {
             return;
         };
 
-        AgentDiffPane::deploy(thread, workspace.downgrade(), window, cx).log_err();
+        AgentDiffPane::deploy(agent, workspace.downgrade(), window, cx).log_err();
     }
 
     fn keep_all(
         editor: &Entity<Editor>,
-        thread: &Entity<Thread>,
+        agent: &Entity<ZedAgentThread>,
         window: &mut Window,
         cx: &mut App,
     ) -> PostReviewState {
@@ -1615,7 +1619,7 @@ impl AgentDiff {
             keep_edits_in_ranges(
                 editor,
                 &snapshot,
-                thread,
+                &agent.read(cx).action_log(),
                 vec![editor::Anchor::min()..editor::Anchor::max()],
                 window,
                 cx,
@@ -1626,7 +1630,7 @@ impl AgentDiff {
 
     fn reject_all(
         editor: &Entity<Editor>,
-        thread: &Entity<Thread>,
+        thread: &Entity<ZedAgentThread>,
         window: &mut Window,
         cx: &mut App,
     ) -> PostReviewState {
@@ -1635,7 +1639,7 @@ impl AgentDiff {
             reject_edits_in_ranges(
                 editor,
                 &snapshot,
-                thread,
+                &thread.read(cx).action_log(),
                 vec![editor::Anchor::min()..editor::Anchor::max()],
                 window,
                 cx,
@@ -1646,26 +1650,26 @@ impl AgentDiff {
 
     fn keep(
         editor: &Entity<Editor>,
-        thread: &Entity<Thread>,
+        agent: &Entity<ZedAgentThread>,
         window: &mut Window,
         cx: &mut App,
     ) -> PostReviewState {
         editor.update(cx, |editor, cx| {
             let snapshot = editor.buffer().read(cx).snapshot(cx);
-            keep_edits_in_selection(editor, &snapshot, thread, window, cx);
+            keep_edits_in_selection(editor, &snapshot, &agent.read(cx).action_log(), window, cx);
             Self::post_review_state(&snapshot)
         })
     }
 
     fn reject(
         editor: &Entity<Editor>,
-        thread: &Entity<Thread>,
+        agent: &Entity<ZedAgentThread>,
         window: &mut Window,
         cx: &mut App,
     ) -> PostReviewState {
         editor.update(cx, |editor, cx| {
             let snapshot = editor.buffer().read(cx).snapshot(cx);
-            reject_edits_in_selection(editor, &snapshot, thread, window, cx);
+            reject_edits_in_selection(editor, &snapshot, &agent.read(cx).action_log(), window, cx);
             Self::post_review_state(&snapshot)
         })
     }
@@ -1682,7 +1686,7 @@ impl AgentDiff {
     fn review_in_active_editor(
         &mut self,
         workspace: &mut Workspace,
-        review: impl Fn(&Entity<Editor>, &Entity<Thread>, &mut Window, &mut App) -> PostReviewState,
+        review: impl Fn(&Entity<Editor>, &Entity<ZedAgentThread>, &mut Window, &mut App) -> PostReviewState,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Option<Task<Result<()>>> {
@@ -1696,14 +1700,13 @@ impl AgentDiff {
             return None;
         }
 
-        let WorkspaceThread { thread, .. } =
-            self.workspace_threads.get(&workspace.weak_handle())?;
+        let WorkspaceThread { agent, .. } = self.workspace_threads.get(&workspace.weak_handle())?;
 
-        let thread = thread.upgrade()?;
+        let agent = agent.upgrade()?;
 
-        if let PostReviewState::AllReviewed = review(&editor, &thread, window, cx) {
+        if let PostReviewState::AllReviewed = review(&editor, &agent, window, cx) {
             if let Some(curr_buffer) = editor.read(cx).buffer().read(cx).as_singleton() {
-                let changed_buffers = thread.read(cx).action_log().read(cx).changed_buffers(cx);
+                let changed_buffers = agent.read(cx).action_log().read(cx).changed_buffers(cx);
 
                 let mut keys = changed_buffers.keys().cycle();
                 keys.find(|k| *k == &curr_buffer);
@@ -1801,13 +1804,13 @@ mod tests {
             })
             .await
             .unwrap();
-        let thread = thread_store.update(cx, |store, cx| store.create_thread(cx));
-        let action_log = thread.read_with(cx, |thread, _| thread.action_log().clone());
+        let agent = thread_store.update(cx, |store, cx| store.create_thread(cx));
+        let action_log = agent.read_with(cx, |agent, _| agent.action_log().clone());
 
         let (workspace, cx) =
             cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
         let agent_diff = cx.new_window_entity(|window, cx| {
-            AgentDiffPane::new(thread.clone(), workspace.downgrade(), window, cx)
+            AgentDiffPane::new(agent.clone(), workspace.downgrade(), window, cx)
         });
         let editor = agent_diff.read_with(cx, |diff, _cx| diff.editor.clone());
 
@@ -1895,7 +1898,7 @@ mod tests {
                 keep_edits_in_ranges(
                     editor,
                     &snapshot,
-                    &thread,
+                    &agent.read(cx).action_log(),
                     vec![position..position],
                     window,
                     cx,
@@ -1966,8 +1969,8 @@ mod tests {
             })
             .await
             .unwrap();
-        let thread = thread_store.update(cx, |store, cx| store.create_thread(cx));
-        let action_log = thread.read_with(cx, |thread, _| thread.action_log().clone());
+        let agent = thread_store.update(cx, |store, cx| store.create_thread(cx));
+        let action_log = agent.read_with(cx, |agent, _| agent.action_log().clone());
 
         let (workspace, cx) =
             cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
@@ -1989,7 +1992,7 @@ mod tests {
 
         // Set the active thread
         cx.update(|window, cx| {
-            AgentDiff::set_active_thread(&workspace.downgrade(), &thread, window, cx)
+            AgentDiff::set_active_thread(&workspace.downgrade(), &agent, window, cx)
         });
 
         let buffer1 = project
@@ -2146,7 +2149,7 @@ mod tests {
             keep_edits_in_ranges(
                 editor,
                 &snapshot,
-                &thread,
+                &agent.read(cx).action_log(),
                 vec![position..position],
                 window,
                 cx,

crates/agent_ui/src/agent_panel.rs

@@ -26,7 +26,7 @@ use crate::{
     ui::AgentOnboardingModal,
 };
 use agent::{
-    Thread, ThreadError, ThreadEvent, ThreadId, ThreadSummary, TokenUsageRatio,
+    ThreadError, ThreadEvent, ThreadId, ThreadSummary, TokenUsageRatio, ZedAgentThread,
     context_store::ContextStore,
     history_store::{HistoryEntryId, HistoryStore},
     thread_store::{TextThreadStore, ThreadStore},
@@ -72,7 +72,7 @@ use zed_actions::{
     agent::{OpenConfiguration, OpenOnboardingModal, ResetOnboarding},
     assistant::{OpenRulesLibrary, ToggleFocus},
 };
-use zed_llm_client::{CompletionIntent, UsageLimit};
+use zed_llm_client::UsageLimit;
 
 const AGENT_PANEL_KEY: &str = "agent_panel";
 
@@ -122,8 +122,8 @@ pub fn init(cx: &mut App) {
                         workspace.focus_panel::<AgentPanel>(window, cx);
                         match &panel.read(cx).active_view {
                             ActiveView::Thread { thread, .. } => {
-                                let thread = thread.read(cx).thread().clone();
-                                AgentDiffPane::deploy_in_workspace(thread, workspace, window, cx);
+                                let agent = thread.read(cx).agent().clone();
+                                AgentDiffPane::deploy_in_workspace(agent, workspace, window, cx);
                             }
                             ActiveView::TextThread { .. }
                             | ActiveView::History
@@ -251,9 +251,9 @@ impl ActiveView {
                             let new_summary = editor.read(cx).text(cx);
 
                             thread.update(cx, |thread, cx| {
-                                thread.thread().update(cx, |thread, cx| {
-                                    thread.set_summary(new_summary, cx);
-                                });
+                                thread.agent().update(cx, |agent, cx| {
+                                    agent.set_summary(new_summary, cx);
+                                })
                             })
                         }
                         EditorEvent::Blurred => {
@@ -274,11 +274,11 @@ impl ActiveView {
                     cx.notify();
                 }
             }),
-            cx.subscribe_in(&active_thread.read(cx).thread().clone(), window, {
+            cx.subscribe_in(&active_thread.read(cx).agent().clone(), window, {
                 let editor = editor.clone();
-                move |_, thread, event, window, cx| match event {
+                move |_, agent, event, window, cx| match event {
                     ThreadEvent::SummaryGenerated => {
-                        let summary = thread.read(cx).summary().or_default();
+                        let summary = agent.read(cx).summary().or_default();
 
                         editor.update(cx, |editor, cx| {
                             editor.set_text(summary, window, cx);
@@ -524,7 +524,7 @@ impl AgentPanel {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Self {
-        let thread = thread_store.update(cx, |this, cx| this.create_thread(cx));
+        let agent = thread_store.update(cx, |this, cx| this.create_thread(cx));
         let fs = workspace.app_state().fs.clone();
         let user_store = workspace.app_state().user_store.clone();
         let project = workspace.project();
@@ -546,13 +546,13 @@ impl AgentPanel {
                 prompt_store.clone(),
                 thread_store.downgrade(),
                 context_store.downgrade(),
-                thread.clone(),
+                agent.clone(),
                 window,
                 cx,
             )
         });
 
-        let thread_id = thread.read(cx).id().clone();
+        let thread_id = agent.read(cx).id().clone();
         let history_store = cx.new(|cx| {
             HistoryStore::new(
                 thread_store.clone(),
@@ -566,7 +566,7 @@ impl AgentPanel {
 
         let active_thread = cx.new(|cx| {
             ActiveThread::new(
-                thread.clone(),
+                agent.clone(),
                 thread_store.clone(),
                 context_store.clone(),
                 message_editor_context_store.clone(),
@@ -607,7 +607,7 @@ impl AgentPanel {
             }
         };
 
-        AgentDiff::set_active_thread(&workspace, &thread, window, cx);
+        AgentDiff::set_active_thread(&workspace, &agent, window, cx);
 
         let weak_panel = weak_self.clone();
 
@@ -649,9 +649,9 @@ impl AgentPanel {
                     ActiveView::Thread { thread, .. } => {
                         thread
                             .read(cx)
-                            .thread()
+                            .agent()
                             .clone()
-                            .update(cx, |thread, cx| thread.get_or_init_configured_model(cx));
+                            .update(cx, |agent, cx| agent.get_or_init_configured_model(cx));
                     }
                     ActiveView::TextThread { .. }
                     | ActiveView::History
@@ -753,7 +753,7 @@ impl AgentPanel {
             None
         };
 
-        let thread = self
+        let agent = self
             .thread_store
             .update(cx, |this, cx| this.create_thread(cx));
 
@@ -786,7 +786,7 @@ impl AgentPanel {
 
         let active_thread = cx.new(|cx| {
             ActiveThread::new(
-                thread.clone(),
+                agent.clone(),
                 self.thread_store.clone(),
                 self.context_store.clone(),
                 context_store.clone(),
@@ -806,7 +806,7 @@ impl AgentPanel {
                 self.prompt_store.clone(),
                 self.thread_store.downgrade(),
                 self.context_store.downgrade(),
-                thread.clone(),
+                agent.clone(),
                 window,
                 cx,
             )
@@ -823,7 +823,7 @@ impl AgentPanel {
         let thread_view = ActiveView::thread(active_thread.clone(), message_editor, window, cx);
         self.set_active_view(thread_view, window, cx);
 
-        AgentDiff::set_active_thread(&self.workspace, &thread, window, cx);
+        AgentDiff::set_active_thread(&self.workspace, &agent, window, cx);
     }
 
     fn new_prompt_editor(&mut self, window: &mut Window, cx: &mut Context<Self>) {
@@ -971,7 +971,7 @@ impl AgentPanel {
 
     pub(crate) fn open_thread(
         &mut self,
-        thread: Entity<Thread>,
+        agent: Entity<ZedAgentThread>,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
@@ -984,7 +984,7 @@ impl AgentPanel {
 
         let active_thread = cx.new(|cx| {
             ActiveThread::new(
-                thread.clone(),
+                agent.clone(),
                 self.thread_store.clone(),
                 self.context_store.clone(),
                 context_store.clone(),
@@ -1003,7 +1003,7 @@ impl AgentPanel {
                 self.prompt_store.clone(),
                 self.thread_store.downgrade(),
                 self.context_store.downgrade(),
-                thread.clone(),
+                agent.clone(),
                 window,
                 cx,
             )
@@ -1012,7 +1012,7 @@ impl AgentPanel {
 
         let thread_view = ActiveView::thread(active_thread.clone(), message_editor, window, cx);
         self.set_active_view(thread_view, window, cx);
-        AgentDiff::set_active_thread(&self.workspace, &thread, window, cx);
+        AgentDiff::set_active_thread(&self.workspace, &agent, window, cx);
     }
 
     pub fn go_back(&mut self, _: &workspace::GoBack, window: &mut Window, cx: &mut Context<Self>) {
@@ -1137,10 +1137,10 @@ impl AgentPanel {
     ) {
         match &self.active_view {
             ActiveView::Thread { thread, .. } => {
-                let thread = thread.read(cx).thread().clone();
+                let agent = thread.read(cx).agent().clone();
                 self.workspace
                     .update(cx, |workspace, cx| {
-                        AgentDiffPane::deploy_in_workspace(thread, workspace, window, cx)
+                        AgentDiffPane::deploy_in_workspace(agent, workspace, window, cx)
                     })
                     .log_err();
             }
@@ -1190,7 +1190,7 @@ impl AgentPanel {
         match &self.active_view {
             ActiveView::Thread { thread, .. } => {
                 active_thread::open_active_thread_as_markdown(
-                    thread.read(cx).thread().clone(),
+                    thread.read(cx).agent().clone(),
                     workspace,
                     window,
                     cx,
@@ -1228,9 +1228,9 @@ impl AgentPanel {
         }
     }
 
-    pub(crate) fn active_thread(&self, cx: &App) -> Option<Entity<Thread>> {
+    pub(crate) fn active_thread(&self, cx: &App) -> Option<Entity<ZedAgentThread>> {
         match &self.active_view {
-            ActiveView::Thread { thread, .. } => Some(thread.read(cx).thread().clone()),
+            ActiveView::Thread { thread, .. } => Some(thread.read(cx).agent().clone()),
             _ => None,
         }
     }
@@ -1249,23 +1249,16 @@ impl AgentPanel {
             return;
         };
 
-        let thread_state = thread.read(cx).thread().read(cx);
-        if !thread_state.tool_use_limit_reached() {
+        let agent_state = thread.read(cx).agent().read(cx);
+        if !agent_state.tool_use_limit_reached() {
             return;
         }
 
-        let model = thread_state.configured_model().map(|cm| cm.model.clone());
+        let model = agent_state.configured_model().map(|cm| cm.model.clone());
         if let Some(model) = model {
             thread.update(cx, |active_thread, cx| {
-                active_thread.thread().update(cx, |thread, cx| {
-                    thread.insert_invisible_continue_message(cx);
-                    thread.advance_prompt_id();
-                    thread.send_to_model(
-                        model,
-                        CompletionIntent::UserPrompt,
-                        Some(window.window_handle()),
-                        cx,
-                    );
+                active_thread.agent().update(cx, |agent, cx| {
+                    agent.send_continue_message(model, Some(window.window_handle()), cx);
                 });
             });
         } else {
@@ -1284,10 +1277,10 @@ impl AgentPanel {
         };
 
         thread.update(cx, |active_thread, cx| {
-            active_thread.thread().update(cx, |thread, _cx| {
-                let current_mode = thread.completion_mode();
+            active_thread.agent().update(cx, |agent, _cx| {
+                let current_mode = agent.completion_mode();
 
-                thread.set_completion_mode(match current_mode {
+                agent.set_completion_mode(match current_mode {
                     CompletionMode::Burn => CompletionMode::Normal,
                     CompletionMode::Normal => CompletionMode::Burn,
                 });
@@ -1330,7 +1323,7 @@ impl AgentPanel {
             ActiveView::Thread { thread, .. } => {
                 let thread = thread.read(cx);
                 if thread.is_empty() {
-                    let id = thread.thread().read(cx).id().clone();
+                    let id = thread.agent().read(cx).id().clone();
                     self.history_store.update(cx, |store, cx| {
                         store.remove_recently_opened_thread(id, cx);
                     });
@@ -1341,7 +1334,7 @@ impl AgentPanel {
 
         match &new_view {
             ActiveView::Thread { thread, .. } => self.history_store.update(cx, |store, cx| {
-                let id = thread.read(cx).thread().read(cx).id().clone();
+                let id = thread.read(cx).agent().read(cx).id().clone();
                 store.push_recently_opened_entry(HistoryEntryId::Thread(id), cx);
             }),
             ActiveView::TextThread { context_editor, .. } => {
@@ -1726,7 +1719,7 @@ impl AgentPanel {
         };
 
         let active_thread = match &self.active_view {
-            ActiveView::Thread { thread, .. } => Some(thread.read(cx).thread().clone()),
+            ActiveView::Thread { thread, .. } => Some(thread.clone()),
             ActiveView::TextThread { .. } | ActiveView::History | ActiveView::Configuration => None,
         };
 
@@ -1761,7 +1754,7 @@ impl AgentPanel {
                                 this.action(
                                     "New From Summary",
                                     Box::new(NewThread {
-                                        from_thread_id: Some(thread.id().clone()),
+                                        from_thread_id: Some(thread.agent().read(cx).id().clone()),
                                     }),
                                 )
                             } else {
@@ -1904,14 +1897,14 @@ impl AgentPanel {
             return None;
         }
 
-        let thread = active_thread.thread().read(cx);
-        let is_generating = thread.is_generating();
-        let conversation_token_usage = thread.total_token_usage()?;
+        let agent = active_thread.agent().read(cx);
+        let is_generating = agent.is_generating();
+        let conversation_token_usage = agent.total_token_usage(cx)?;
 
         let (total_token_usage, is_estimating) =
             if let Some((editing_message_id, unsent_tokens)) = active_thread.editing_message_id() {
-                let combined = thread
-                    .token_usage_up_to_message(editing_message_id)
+                let combined = agent
+                    .token_usage_up_to_message(editing_message_id, cx)
                     .add(unsent_tokens);
 
                 (combined, unsent_tokens > 0)
@@ -2022,7 +2015,7 @@ impl AgentPanel {
             ActiveView::Thread { thread, .. } => {
                 let is_using_zed_provider = thread
                     .read(cx)
-                    .thread()
+                    .agent()
                     .read(cx)
                     .configured_model()
                     .map_or(false, |model| {
@@ -2622,14 +2615,14 @@ impl AgentPanel {
             }
         };
 
-        let thread = active_thread.read(cx).thread().read(cx);
+        let agent = active_thread.read(cx).agent().read(cx);
 
-        let tool_use_limit_reached = thread.tool_use_limit_reached();
+        let tool_use_limit_reached = agent.tool_use_limit_reached();
         if !tool_use_limit_reached {
             return None;
         }
 
-        let model = thread.configured_model()?.model;
+        let model = agent.configured_model()?.model;
 
         let focus_handle = self.focus_handle(cx);
 
@@ -2677,8 +2670,8 @@ impl AgentPanel {
                                     let active_thread = active_thread.clone();
                                     cx.listener(move |this, _, window, cx| {
                                         active_thread.update(cx, |active_thread, cx| {
-                                            active_thread.thread().update(cx, |thread, _cx| {
-                                                thread.set_completion_mode(CompletionMode::Burn);
+                                            active_thread.agent().update(cx, |agent, _cx| {
+                                                agent.set_completion_mode(CompletionMode::Burn);
                                             });
                                         });
                                         this.continue_conversation(window, cx);
@@ -3062,8 +3055,8 @@ impl Render for AgentPanel {
                 match &this.active_view {
                     ActiveView::Thread { thread, .. } => {
                         thread.update(cx, |active_thread, cx| {
-                            active_thread.thread().update(cx, |thread, _cx| {
-                                thread.set_completion_mode(CompletionMode::Burn);
+                            active_thread.agent().update(cx, |agent, _cx| {
+                                agent.set_completion_mode(CompletionMode::Burn);
                             });
                         });
                         this.continue_conversation(window, cx);

crates/agent_ui/src/agent_ui.rs

@@ -26,7 +26,7 @@ mod ui;
 
 use std::sync::Arc;
 
-use agent::{Thread, ThreadId};
+use agent::{ThreadId, ZedAgentThread};
 use agent_settings::{AgentProfileId, AgentSettings, LanguageModelSelection};
 use assistant_slash_command::SlashCommandRegistry;
 use client::Client;
@@ -114,7 +114,7 @@ impl ManageProfiles {
 
 #[derive(Clone)]
 pub(crate) enum ModelUsageContext {
-    Thread(Entity<Thread>),
+    Thread(Entity<ZedAgentThread>),
     InlineAssistant,
 }
 

crates/agent_ui/src/context_picker/completion_provider.rs

@@ -22,7 +22,7 @@ use util::ResultExt as _;
 use workspace::Workspace;
 
 use agent::{
-    Thread,
+    ZedAgentThread,
     context::{AgentContextHandle, AgentContextKey, RULES_ICON},
     thread_store::{TextThreadStore, ThreadStore},
 };
@@ -449,7 +449,7 @@ impl ContextPickerCompletionProvider {
                         let context_store = context_store.clone();
                         let thread_store = thread_store.clone();
                         window.spawn::<_, Option<_>>(cx, async move |cx| {
-                            let thread: Entity<Thread> = thread_store
+                            let thread: Entity<ZedAgentThread> = thread_store
                                 .update_in(cx, |thread_store, window, cx| {
                                     thread_store.open_thread(&thread_id, window, cx)
                                 })

crates/agent_ui/src/message_editor.rs

@@ -9,6 +9,7 @@ use crate::ui::{
     MaxModeTooltip,
     preview::{AgentPreview, UsageCallout},
 };
+use agent::thread::UserMessageParams;
 use agent::{
     context::{AgentContextKey, ContextLoadResult, load_context},
     context_store::ContextStoreEvent,
@@ -31,7 +32,7 @@ use gpui::{
     Animation, AnimationExt, App, Entity, EventEmitter, Focusable, Subscription, Task, TextStyle,
     WeakEntity, linear_color_stop, linear_gradient, point, pulsating_between,
 };
-use language::{Buffer, Language, Point};
+use language::{Buffer, Language};
 use language_model::{
     ConfiguredModel, LanguageModelRequestMessage, MessageContent, ZED_CLOUD_PROVIDER_ID,
 };
@@ -47,7 +48,6 @@ use ui::{
 };
 use util::ResultExt as _;
 use workspace::{CollaboratorId, Workspace};
-use zed_llm_client::CompletionIntent;
 
 use crate::context_picker::{ContextPicker, ContextPickerCompletionProvider, crease_for_mention};
 use crate::context_strip::{ContextStrip, ContextStripEvent, SuggestContextKind};
@@ -58,14 +58,14 @@ use crate::{
     ToggleContextPicker, ToggleProfileSelector, register_agent_preview,
 };
 use agent::{
-    MessageCrease, Thread, TokenUsageRatio,
+    MessageCrease, TokenUsageRatio, ZedAgentThread,
     context_store::ContextStore,
     thread_store::{TextThreadStore, ThreadStore},
 };
 
 #[derive(RegisterComponent)]
 pub struct MessageEditor {
-    thread: Entity<Thread>,
+    agent: Entity<ZedAgentThread>,
     incompatible_tools_state: Entity<IncompatibleToolsState>,
     editor: Entity<Editor>,
     workspace: WeakEntity<Workspace>,
@@ -156,7 +156,7 @@ impl MessageEditor {
         prompt_store: Option<Entity<PromptStore>>,
         thread_store: WeakEntity<ThreadStore>,
         text_thread_store: WeakEntity<TextThreadStore>,
-        thread: Entity<Thread>,
+        agent: Entity<ZedAgentThread>,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Self {
@@ -182,13 +182,13 @@ impl MessageEditor {
                 Some(text_thread_store.clone()),
                 context_picker_menu_handle.clone(),
                 SuggestContextKind::File,
-                ModelUsageContext::Thread(thread.clone()),
+                ModelUsageContext::Thread(agent.clone()),
                 window,
                 cx,
             )
         });
 
-        let incompatible_tools = cx.new(|cx| IncompatibleToolsState::new(thread.clone(), cx));
+        let incompatible_tools = cx.new(|cx| IncompatibleToolsState::new(agent.clone(), cx));
 
         let subscriptions = vec![
             cx.subscribe_in(&context_strip, window, Self::handle_context_strip_event),
@@ -200,9 +200,7 @@ impl MessageEditor {
                 // When context changes, reload it for token counting.
                 let _ = this.reload_context(cx);
             }),
-            cx.observe(&thread.read(cx).action_log().clone(), |_, _, cx| {
-                cx.notify()
-            }),
+            cx.observe(&agent.read(cx).action_log().clone(), |_, _, cx| cx.notify()),
         ];
 
         let model_selector = cx.new(|cx| {
@@ -210,20 +208,20 @@ impl MessageEditor {
                 fs.clone(),
                 model_selector_menu_handle,
                 editor.focus_handle(cx),
-                ModelUsageContext::Thread(thread.clone()),
+                ModelUsageContext::Thread(agent.clone()),
                 window,
                 cx,
             )
         });
 
         let profile_selector =
-            cx.new(|cx| ProfileSelector::new(fs, thread.clone(), editor.focus_handle(cx), cx));
+            cx.new(|cx| ProfileSelector::new(fs, agent.clone(), editor.focus_handle(cx), cx));
 
         Self {
             editor: editor.clone(),
-            project: thread.read(cx).project().clone(),
+            project: agent.read(cx).project().clone(),
             user_store,
-            thread,
+            agent,
             incompatible_tools_state: incompatible_tools.clone(),
             workspace,
             context_store,
@@ -313,11 +311,11 @@ impl MessageEditor {
             return;
         }
 
-        self.thread.update(cx, |thread, cx| {
+        self.agent.update(cx, |thread, cx| {
             thread.cancel_editing(cx);
         });
 
-        if self.thread.read(cx).is_generating() {
+        if self.agent.read(cx).is_generating() {
             self.stop_current_and_send_new_message(window, cx);
             return;
         }
@@ -354,7 +352,7 @@ impl MessageEditor {
 
     fn send_to_model(&mut self, window: &mut Window, cx: &mut Context<Self>) {
         let Some(ConfiguredModel { model, provider }) = self
-            .thread
+            .agent
             .update(cx, |thread, cx| thread.get_or_init_configured_model(cx))
         else {
             return;
@@ -375,7 +373,7 @@ impl MessageEditor {
         self.last_estimated_token_count.take();
         cx.emit(MessageEditorEvent::EstimatedTokenCount);
 
-        let thread = self.thread.clone();
+        let agent = self.agent.clone();
         let git_store = self.project.read(cx).git_store().clone();
         let checkpoint = git_store.update(cx, |git_store, cx| git_store.checkpoint(cx));
         let context_task = self.reload_context(cx);
@@ -385,24 +383,16 @@ impl MessageEditor {
             let (checkpoint, loaded_context) = future::join(checkpoint, context_task).await;
             let loaded_context = loaded_context.unwrap_or_default();
 
-            thread
+            agent
                 .update(cx, |thread, cx| {
-                    thread.insert_user_message(
-                        user_message,
-                        loaded_context,
-                        checkpoint.ok(),
-                        user_message_creases,
-                        cx,
-                    );
-                })
-                .log_err();
-
-            thread
-                .update(cx, |thread, cx| {
-                    thread.advance_prompt_id();
-                    thread.send_to_model(
+                    thread.send_message(
+                        UserMessageParams {
+                            text: user_message,
+                            creases: user_message_creases,
+                            checkpoint: checkpoint.ok(),
+                            context: loaded_context,
+                        },
                         model,
-                        CompletionIntent::UserPrompt,
                         Some(window_handle),
                         cx,
                     );
@@ -413,11 +403,11 @@ impl MessageEditor {
     }
 
     fn stop_current_and_send_new_message(&mut self, window: &mut Window, cx: &mut Context<Self>) {
-        self.thread.update(cx, |thread, cx| {
+        self.agent.update(cx, |thread, cx| {
             thread.cancel_editing(cx);
         });
 
-        let cancelled = self.thread.update(cx, |thread, cx| {
+        let cancelled = self.agent.update(cx, |thread, cx| {
             thread.cancel_last_completion(Some(window.window_handle()), cx)
         });
 
@@ -459,7 +449,7 @@ impl MessageEditor {
 
     fn handle_review_click(&mut self, window: &mut Window, cx: &mut Context<Self>) {
         self.edits_expanded = true;
-        AgentDiffPane::deploy(self.thread.clone(), self.workspace.clone(), window, cx).log_err();
+        AgentDiffPane::deploy(self.agent.clone(), self.workspace.clone(), window, cx).log_err();
         cx.notify();
     }
 
@@ -475,7 +465,7 @@ impl MessageEditor {
         cx: &mut Context<Self>,
     ) {
         if let Ok(diff) =
-            AgentDiffPane::deploy(self.thread.clone(), self.workspace.clone(), window, cx)
+            AgentDiffPane::deploy(self.agent.clone(), self.workspace.clone(), window, cx)
         {
             let path_key = multi_buffer::PathKey::for_buffer(&buffer, cx);
             diff.update(cx, |diff, cx| diff.move_to_path(path_key, window, cx));
@@ -488,7 +478,7 @@ impl MessageEditor {
         _window: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        self.thread.update(cx, |thread, _cx| {
+        self.agent.update(cx, |thread, _cx| {
             let active_completion_mode = thread.completion_mode();
 
             thread.set_completion_mode(match active_completion_mode {
@@ -499,36 +489,22 @@ impl MessageEditor {
     }
 
     fn handle_accept_all(&mut self, _window: &mut Window, cx: &mut Context<Self>) {
-        if self.thread.read(cx).has_pending_edit_tool_uses() {
+        if self.agent.read(cx).has_pending_edit_tool_uses() {
             return;
         }
 
-        self.thread.update(cx, |thread, cx| {
-            thread.keep_all_edits(cx);
-        });
+        let action_log = self.agent.read(cx).action_log();
+        action_log.update(cx, |action_log, cx| action_log.keep_all_edits(cx));
         cx.notify();
     }
 
     fn handle_reject_all(&mut self, _window: &mut Window, cx: &mut Context<Self>) {
-        if self.thread.read(cx).has_pending_edit_tool_uses() {
+        if self.agent.read(cx).has_pending_edit_tool_uses() {
             return;
         }
 
-        // Since there's no reject_all_edits method in the thread API,
-        // we need to iterate through all buffers and reject their edits
-        let action_log = self.thread.read(cx).action_log().clone();
-        let changed_buffers = action_log.read(cx).changed_buffers(cx);
-
-        for (buffer, _) in changed_buffers {
-            self.thread.update(cx, |thread, cx| {
-                let buffer_snapshot = buffer.read(cx);
-                let start = buffer_snapshot.anchor_before(Point::new(0, 0));
-                let end = buffer_snapshot.anchor_after(buffer_snapshot.max_point());
-                thread
-                    .reject_edits_in_ranges(buffer, vec![start..end], cx)
-                    .detach();
-            });
-        }
+        let action_log = self.agent.read(cx).action_log();
+        action_log.update(cx, |action_log, cx| action_log.reject_all_edits(cx));
         cx.notify();
     }
 
@@ -538,17 +514,13 @@ impl MessageEditor {
         _window: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        if self.thread.read(cx).has_pending_edit_tool_uses() {
+        if self.agent.read(cx).has_pending_edit_tool_uses() {
             return;
         }
 
-        self.thread.update(cx, |thread, cx| {
-            let buffer_snapshot = buffer.read(cx);
-            let start = buffer_snapshot.anchor_before(Point::new(0, 0));
-            let end = buffer_snapshot.anchor_after(buffer_snapshot.max_point());
-            thread
-                .reject_edits_in_ranges(buffer, vec![start..end], cx)
-                .detach();
+        let action_log = self.agent.read(cx).action_log();
+        action_log.update(cx, |action_log, cx| {
+            action_log.reject_buffer_edits(buffer, cx)
         });
         cx.notify();
     }
@@ -559,21 +531,19 @@ impl MessageEditor {
         _window: &mut Window,
         cx: &mut Context<Self>,
     ) {
-        if self.thread.read(cx).has_pending_edit_tool_uses() {
+        if self.agent.read(cx).has_pending_edit_tool_uses() {
             return;
         }
 
-        self.thread.update(cx, |thread, cx| {
-            let buffer_snapshot = buffer.read(cx);
-            let start = buffer_snapshot.anchor_before(Point::new(0, 0));
-            let end = buffer_snapshot.anchor_after(buffer_snapshot.max_point());
-            thread.keep_edits_in_range(buffer, start..end, cx);
+        let action_log = self.agent.read(cx).action_log();
+        action_log.update(cx, |action_log, cx| {
+            action_log.keep_buffer_edits(buffer, cx)
         });
         cx.notify();
     }
 
     fn render_burn_mode_toggle(&self, cx: &mut Context<Self>) -> Option<AnyElement> {
-        let thread = self.thread.read(cx);
+        let thread = self.agent.read(cx);
         let model = thread.configured_model();
         if !model?.model.supports_burn_mode() {
             return None;
@@ -644,7 +614,7 @@ impl MessageEditor {
     }
 
     fn render_editor(&self, window: &mut Window, cx: &mut Context<Self>) -> Div {
-        let thread = self.thread.read(cx);
+        let thread = self.agent.read(cx);
         let model = thread.configured_model();
 
         let editor_bg_color = cx.theme().colors().editor_background;
@@ -945,7 +915,7 @@ impl MessageEditor {
         let bg_edit_files_disclosure = editor_bg_color.blend(active_color.opacity(0.3));
 
         let is_edit_changes_expanded = self.edits_expanded;
-        let thread = self.thread.read(cx);
+        let thread = self.agent.read(cx);
         let pending_edits = thread.has_pending_edit_tool_uses();
 
         const EDIT_NOT_READY_TOOLTIP_LABEL: &str = "Wait until file edits are complete.";
@@ -1247,7 +1217,7 @@ impl MessageEditor {
     }
 
     fn is_using_zed_provider(&self, cx: &App) -> bool {
-        self.thread
+        self.agent
             .read(cx)
             .configured_model()
             .map_or(false, |model| {
@@ -1325,7 +1295,7 @@ impl MessageEditor {
                 Button::new("start-new-thread", "Start New Thread")
                     .label_size(LabelSize::Small)
                     .on_click(cx.listener(|this, _, window, cx| {
-                        let from_thread_id = Some(this.thread.read(cx).id().clone());
+                        let from_thread_id = Some(this.agent.read(cx).id().clone());
                         window.dispatch_action(Box::new(NewThread { from_thread_id }), cx);
                     })),
             );
@@ -1359,10 +1329,11 @@ impl MessageEditor {
     fn reload_context(&mut self, cx: &mut Context<Self>) -> Task<Option<ContextLoadResult>> {
         let load_task = cx.spawn(async move |this, cx| {
             let Ok(load_task) = this.update(cx, |this, cx| {
-                let new_context = this
-                    .context_store
-                    .read(cx)
-                    .new_context_for_thread(this.thread.read(cx), None);
+                let new_context = this.context_store.read(cx).new_context_for_thread(
+                    this.agent.read(cx),
+                    None,
+                    cx,
+                );
                 load_context(new_context, &this.project, &this.prompt_store, cx)
             }) else {
                 return;
@@ -1394,7 +1365,7 @@ impl MessageEditor {
         cx.emit(MessageEditorEvent::Changed);
         self.update_token_count_task.take();
 
-        let Some(model) = self.thread.read(cx).configured_model() else {
+        let Some(model) = self.agent.read(cx).configured_model() else {
             self.last_estimated_token_count.take();
             return;
         };
@@ -1599,16 +1570,16 @@ impl Focusable for MessageEditor {
 
 impl Render for MessageEditor {
     fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        let thread = self.thread.read(cx);
-        let token_usage_ratio = thread
-            .total_token_usage()
+        let agent = self.agent.read(cx);
+        let token_usage_ratio = agent
+            .total_token_usage(cx)
             .map_or(TokenUsageRatio::Normal, |total_token_usage| {
                 total_token_usage.ratio()
             });
 
-        let burn_mode_enabled = thread.completion_mode() == CompletionMode::Burn;
+        let burn_mode_enabled = agent.completion_mode() == CompletionMode::Burn;
 
-        let action_log = self.thread.read(cx).action_log();
+        let action_log = agent.action_log();
         let changed_buffers = action_log.read(cx).changed_buffers(cx);
 
         let line_height = TextSize::Small.rems(cx).to_pixels(window.rem_size()) * 1.5;
@@ -1691,7 +1662,7 @@ impl AgentPreview for MessageEditor {
             let weak_project = project.downgrade();
             let context_store = cx.new(|_cx| ContextStore::new(weak_project, None));
             let active_thread = active_thread.read(cx);
-            let thread = active_thread.thread().clone();
+            let agent = active_thread.agent().clone();
             let thread_store = active_thread.thread_store().clone();
             let text_thread_store = active_thread.text_thread_store().clone();
 
@@ -1704,7 +1675,7 @@ impl AgentPreview for MessageEditor {
                     None,
                     thread_store.downgrade(),
                     text_thread_store.downgrade(),
-                    thread,
+                    agent,
                     window,
                     cx,
                 )

crates/agent_ui/src/profile_selector.rs

@@ -1,6 +1,6 @@
 use crate::{ManageProfiles, ToggleProfileSelector};
 use agent::{
-    Thread,
+    ZedAgentThread,
     agent_profile::{AgentProfile, AvailableProfiles},
 };
 use agent_settings::{AgentDockPosition, AgentProfileId, AgentSettings, builtin_profiles};
@@ -17,7 +17,7 @@ use ui::{
 pub struct ProfileSelector {
     profiles: AvailableProfiles,
     fs: Arc<dyn Fs>,
-    thread: Entity<Thread>,
+    thread: Entity<ZedAgentThread>,
     menu_handle: PopoverMenuHandle<ContextMenu>,
     focus_handle: FocusHandle,
     _subscriptions: Vec<Subscription>,
@@ -26,7 +26,7 @@ pub struct ProfileSelector {
 impl ProfileSelector {
     pub fn new(
         fs: Arc<dyn Fs>,
-        thread: Entity<Thread>,
+        thread: Entity<ZedAgentThread>,
         focus_handle: FocusHandle,
         cx: &mut Context<Self>,
     ) -> Self {

crates/agent_ui/src/tool_compatibility.rs

@@ -1,4 +1,4 @@
-use agent::{Thread, ThreadEvent};
+use agent::{ThreadEvent, ZedAgentThread};
 use assistant_tool::{Tool, ToolSource};
 use collections::HashMap;
 use gpui::{App, Context, Entity, IntoElement, Render, Subscription, Window};
@@ -8,12 +8,12 @@ use ui::prelude::*;
 
 pub struct IncompatibleToolsState {
     cache: HashMap<LanguageModelToolSchemaFormat, Vec<Arc<dyn Tool>>>,
-    thread: Entity<Thread>,
+    thread: Entity<ZedAgentThread>,
     _thread_subscription: Subscription,
 }
 
 impl IncompatibleToolsState {
-    pub fn new(thread: Entity<Thread>, cx: &mut Context<Self>) -> Self {
+    pub fn new(thread: Entity<ZedAgentThread>, cx: &mut Context<Self>) -> Self {
         let _tool_working_set_subscription =
             cx.subscribe(&thread, |this, _, event, _| match event {
                 ThreadEvent::ProfileChanged => {

crates/agent_ui/src/ui/context_pill.rs

@@ -488,7 +488,7 @@ impl AddedContext {
             parent: None,
             tooltip: None,
             icon_path: None,
-            status: if handle.thread.read(cx).is_generating_detailed_summary() {
+            status: if handle.agent.read(cx).is_generating_detailed_summary() {
                 ContextStatus::Loading {
                     message: "Summarizing…".into(),
                 }
@@ -496,9 +496,9 @@ impl AddedContext {
                 ContextStatus::Ready
             },
             render_hover: {
-                let thread = handle.thread.clone();
+                let agent = handle.agent.clone();
                 Some(Rc::new(move |_, cx| {
-                    let text = thread.read(cx).latest_detailed_summary_or_text();
+                    let text = agent.read(cx).latest_detailed_summary_or_text(cx);
                     ContextPillHover::new_text(text.clone(), cx).into()
                 }))
             },

crates/assistant_tool/Cargo.toml

@@ -5,6 +5,9 @@ edition.workspace = true
 publish.workspace = true
 license = "GPL-3.0-or-later"
 
+[features]
+test-support = []
+
 [lints]
 workspace = true
 

crates/assistant_tool/src/action_log.rs

@@ -495,6 +495,10 @@ impl ActionLog {
         cx.notify();
     }
 
+    pub fn keep_buffer_edits(&mut self, buffer: Entity<Buffer>, cx: &mut Context<Self>) {
+        self.keep_edits_in_range(buffer, Anchor::MIN..Anchor::MAX, cx);
+    }
+
     pub fn keep_edits_in_range(
         &mut self,
         buffer: Entity<Buffer>,
@@ -555,6 +559,19 @@ impl ActionLog {
         }
     }
 
+    pub fn reject_all_edits(&mut self, cx: &mut Context<Self>) {
+        let changed_buffers = self.changed_buffers(cx);
+        for (buffer, _) in changed_buffers {
+            self.reject_edits_in_ranges(buffer, vec![Anchor::MIN..Anchor::MAX], cx)
+                .detach();
+        }
+    }
+
+    pub fn reject_buffer_edits(&mut self, buffer: Entity<Buffer>, cx: &mut Context<Self>) {
+        self.reject_edits_in_ranges(buffer, vec![Anchor::MIN..Anchor::MAX], cx)
+            .detach()
+    }
+
     pub fn reject_edits_in_ranges(
         &mut self,
         buffer: Entity<Buffer>,

crates/assistant_tool/src/assistant_tool.rs

@@ -70,7 +70,7 @@ pub struct ToolResultOutput {
     pub output: Option<serde_json::Value>,
 }
 
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Clone, Debug, PartialEq, Eq)]
 pub enum ToolResultContent {
     Text(String),
     Image(LanguageModelImage),
@@ -135,7 +135,8 @@ pub trait ToolCard: 'static + Sized {
     ) -> impl IntoElement;
 }
 
-#[derive(Clone)]
+#[derive(Debug, Clone)]
+#[cfg_attr(any(test, feature = "test-support"), derive(PartialEq, Eq))]
 pub struct AnyToolCard {
     entity: gpui::AnyEntity,
     render: fn(

crates/context_server/src/context_server.rs

@@ -29,6 +29,7 @@ impl Display for ContextServerId {
 
 #[derive(Deserialize, Serialize, Clone, PartialEq, Eq, JsonSchema)]
 pub struct ContextServerCommand {
+    #[serde(rename = "command")]
     pub path: String,
     pub args: Vec<String>,
     pub env: Option<HashMap<String, String>>,

crates/debugger_ui/src/debugger_panel.rs

@@ -868,7 +868,7 @@ impl DebugPanel {
                                         let threads =
                                             running_state.update(cx, |running_state, cx| {
                                                 let session = running_state.session();
-                                                session.read(cx).is_running().then(|| {
+                                                session.read(cx).is_started().then(|| {
                                                     session.update(cx, |session, cx| {
                                                         session.threads(cx)
                                                     })
@@ -1468,6 +1468,94 @@ impl Render for DebugPanel {
                 if has_sessions {
                     this.children(self.active_session.clone())
                 } else {
+                    let docked_to_bottom = self.position(window, cx) == DockPosition::Bottom;
+                    let welcome_experience = v_flex()
+                        .when_else(
+                            docked_to_bottom,
+                            |this| this.w_2_3().h_full().pr_8(),
+                            |this| this.w_full().h_1_3(),
+                        )
+                        .items_center()
+                        .justify_center()
+                        .gap_2()
+                        .child(
+                            Button::new("spawn-new-session-empty-state", "New Session")
+                                .icon(IconName::Plus)
+                                .icon_size(IconSize::XSmall)
+                                .icon_color(Color::Muted)
+                                .icon_position(IconPosition::Start)
+                                .on_click(|_, window, cx| {
+                                    window.dispatch_action(crate::Start.boxed_clone(), cx);
+                                }),
+                        )
+                        .child(
+                            Button::new("edit-debug-settings", "Edit debug.json")
+                                .icon(IconName::Code)
+                                .icon_size(IconSize::XSmall)
+                                .color(Color::Muted)
+                                .icon_color(Color::Muted)
+                                .icon_position(IconPosition::Start)
+                                .on_click(|_, window, cx| {
+                                    window.dispatch_action(
+                                        zed_actions::OpenProjectDebugTasks.boxed_clone(),
+                                        cx,
+                                    );
+                                }),
+                        )
+                        .child(
+                            Button::new("open-debugger-docs", "Debugger Docs")
+                                .icon(IconName::Book)
+                                .color(Color::Muted)
+                                .icon_size(IconSize::XSmall)
+                                .icon_color(Color::Muted)
+                                .icon_position(IconPosition::Start)
+                                .on_click(|_, _, cx| cx.open_url("https://zed.dev/docs/debugger")),
+                        )
+                        .child(
+                            Button::new(
+                                "spawn-new-session-install-extensions",
+                                "Debugger Extensions",
+                            )
+                            .icon(IconName::Blocks)
+                            .color(Color::Muted)
+                            .icon_size(IconSize::XSmall)
+                            .icon_color(Color::Muted)
+                            .icon_position(IconPosition::Start)
+                            .on_click(|_, window, cx| {
+                                window.dispatch_action(
+                                    zed_actions::Extensions {
+                                        category_filter: Some(
+                                            zed_actions::ExtensionCategoryFilter::DebugAdapters,
+                                        ),
+                                    }
+                                    .boxed_clone(),
+                                    cx,
+                                );
+                            }),
+                        );
+                    let breakpoint_list =
+                        v_flex()
+                            .group("base-breakpoint-list")
+                            .items_start()
+                            .when_else(
+                                docked_to_bottom,
+                                |this| this.min_w_1_3().h_full(),
+                                |this| this.w_full().h_2_3(),
+                            )
+                            .p_1()
+                            .child(
+                                h_flex()
+                                    .pl_1()
+                                    .w_full()
+                                    .justify_between()
+                                    .child(Label::new("Breakpoints").size(LabelSize::Small))
+                                    .child(h_flex().visible_on_hover("base-breakpoint-list").child(
+                                        self.breakpoint_list.read(cx).render_control_strip(),
+                                    ))
+                                    .track_focus(&self.breakpoint_list.focus_handle(cx)),
+                            )
+                            .child(Divider::horizontal())
+                            .child(self.breakpoint_list.clone());
                     this.child(
                         v_flex()
                             .h_full()
@@ -1475,65 +1563,23 @@ impl Render for DebugPanel {
                             .items_center()
                             .justify_center()
                             .child(
-                                h_flex().size_full()
-                                    .items_start()
-
-                                    .child(v_flex().group("base-breakpoint-list").items_start().min_w_1_3().h_full().p_1()
-                                        .child(h_flex().pl_1().w_full().justify_between()
-                                            .child(Label::new("Breakpoints").size(LabelSize::Small))
-                                            .child(h_flex().visible_on_hover("base-breakpoint-list").child(self.breakpoint_list.read(cx).render_control_strip())))
-                                        .child(Divider::horizontal())
-                                        .child(self.breakpoint_list.clone()))
-                                    .child(Divider::vertical())
-                                    .child(
-                                        v_flex().w_2_3().h_full().items_center().justify_center()
-                                            .gap_2()
-                                            .pr_8()
-                                            .child(
-                                                Button::new("spawn-new-session-empty-state", "New Session")
-                                                    .icon(IconName::Plus)
-                                                    .icon_size(IconSize::XSmall)
-                                                    .icon_color(Color::Muted)
-                                                    .icon_position(IconPosition::Start)
-                                                    .on_click(|_, window, cx| {
-                                                        window.dispatch_action(crate::Start.boxed_clone(), cx);
-                                                    })
-                                            )
-                                            .child(
-                                                Button::new("edit-debug-settings", "Edit debug.json")
-                                                    .icon(IconName::Code)
-                                                    .icon_size(IconSize::XSmall)
-                                                    .color(Color::Muted)
-                                                    .icon_color(Color::Muted)
-                                                    .icon_position(IconPosition::Start)
-                                                    .on_click(|_, window, cx| {
-                                                        window.dispatch_action(zed_actions::OpenProjectDebugTasks.boxed_clone(), cx);
-                                                    })
-                                            )
-                                            .child(
-                                                Button::new("open-debugger-docs", "Debugger Docs")
-                                                    .icon(IconName::Book)
-                                                    .color(Color::Muted)
-                                                    .icon_size(IconSize::XSmall)
-                                                    .icon_color(Color::Muted)
-                                                    .icon_position(IconPosition::Start)
-                                                    .on_click(|_, _, cx| {
-                                                        cx.open_url("https://zed.dev/docs/debugger")
-                                                    })
-                                            )
-                                            .child(
-                                                Button::new("spawn-new-session-install-extensions", "Debugger Extensions")
-                                                    .icon(IconName::Blocks)
-                                                    .color(Color::Muted)
-                                                    .icon_size(IconSize::XSmall)
-                                                    .icon_color(Color::Muted)
-                                                    .icon_position(IconPosition::Start)
-                                                    .on_click(|_, window, cx| {
-                                                        window.dispatch_action(zed_actions::Extensions { category_filter: Some(zed_actions::ExtensionCategoryFilter::DebugAdapters)}.boxed_clone(), cx);
-                                                    })
-                                            )
-                                    )
-                            )
+                                div()
+                                    .when_else(docked_to_bottom, Div::h_flex, Div::v_flex)
+                                    .size_full()
+                                    .map(|this| {
+                                        if docked_to_bottom {
+                                            this.items_start()
+                                                .child(breakpoint_list)
+                                                .child(Divider::vertical())
+                                                .child(welcome_experience)
+                                        } else {
+                                            this.items_end()
+                                                .child(welcome_experience)
+                                                .child(Divider::horizontal())
+                                                .child(breakpoint_list)
+                                        }
+                                    }),
+                            ),
                     )
                 }
             })

crates/debugger_ui/src/session/running/breakpoint_list.rs

@@ -877,20 +877,13 @@ impl LineBreakpoint {
                 })
                 .cursor_pointer()
                 .child(
-                    h_flex()
-                        .gap_1()
-                        .child(
-                            Label::new(format!("{}:{}", self.name, self.line))
-                                .size(LabelSize::Small)
-                                .line_height_style(ui::LineHeightStyle::UiLabel),
-                        )
-                        .children(self.dir.clone().map(|dir| {
-                            Label::new(dir)
-                                .color(Color::Muted)
-                                .size(LabelSize::Small)
-                                .line_height_style(ui::LineHeightStyle::UiLabel)
-                        })),
+                    Label::new(format!("{}:{}", self.name, self.line))
+                        .size(LabelSize::Small)
+                        .line_height_style(ui::LineHeightStyle::UiLabel),
                 )
+                .when_some(self.dir.as_ref(), |this, parent_dir| {
+                    this.tooltip(Tooltip::text(format!("Worktree parent path: {parent_dir}")))
+                })
                 .child(BreakpointOptionsStrip {
                     props,
                     breakpoint: BreakpointEntry {

crates/debugger_ui/src/session/running/console.rs

@@ -114,7 +114,7 @@ impl Console {
     }
 
     fn is_running(&self, cx: &Context<Self>) -> bool {
-        self.session.read(cx).is_running()
+        self.session.read(cx).is_started()
     }
 
     fn handle_stack_frame_list_events(

crates/editor/src/display_map/fold_map.rs

@@ -1,3 +1,5 @@
+use crate::display_map::inlay_map::InlayChunk;
+
 use super::{
     Highlights,
     inlay_map::{InlayBufferRows, InlayChunks, InlayEdit, InlayOffset, InlayPoint, InlaySnapshot},
@@ -1060,7 +1062,7 @@ impl sum_tree::Summary for TransformSummary {
 }
 
 #[derive(Copy, Clone, Eq, PartialEq, Debug, Default, Ord, PartialOrd, Hash)]
-pub struct FoldId(usize);
+pub struct FoldId(pub(super) usize);
 
 impl From<FoldId> for ElementId {
     fn from(val: FoldId) -> Self {
@@ -1311,7 +1313,7 @@ impl DerefMut for ChunkRendererContext<'_, '_> {
 pub struct FoldChunks<'a> {
     transform_cursor: Cursor<'a, Transform, (FoldOffset, InlayOffset)>,
     inlay_chunks: InlayChunks<'a>,
-    inlay_chunk: Option<(InlayOffset, language::Chunk<'a>)>,
+    inlay_chunk: Option<(InlayOffset, InlayChunk<'a>)>,
     inlay_offset: InlayOffset,
     output_offset: FoldOffset,
     max_output_offset: FoldOffset,
@@ -1403,7 +1405,8 @@ impl<'a> Iterator for FoldChunks<'a> {
         }
 
         // Otherwise, take a chunk from the buffer's text.
-        if let Some((buffer_chunk_start, mut chunk)) = self.inlay_chunk.clone() {
+        if let Some((buffer_chunk_start, mut inlay_chunk)) = self.inlay_chunk.clone() {
+            let chunk = &mut inlay_chunk.chunk;
             let buffer_chunk_end = buffer_chunk_start + InlayOffset(chunk.text.len());
             let transform_end = self.transform_cursor.end(&()).1;
             let chunk_end = buffer_chunk_end.min(transform_end);
@@ -1428,7 +1431,7 @@ impl<'a> Iterator for FoldChunks<'a> {
                 is_tab: chunk.is_tab,
                 is_inlay: chunk.is_inlay,
                 underline: chunk.underline,
-                renderer: None,
+                renderer: inlay_chunk.renderer,
             });
         }
 

crates/editor/src/display_map/inlay_map.rs

@@ -1,4 +1,4 @@
-use crate::{HighlightStyles, InlayId};
+use crate::{ChunkRenderer, HighlightStyles, InlayId, display_map::FoldId};
 use collections::BTreeSet;
 use gpui::{Hsla, Rgba};
 use language::{Chunk, Edit, Point, TextSummary};
@@ -8,9 +8,11 @@ use multi_buffer::{
 use std::{
     cmp,
     ops::{Add, AddAssign, Range, Sub, SubAssign},
+    sync::Arc,
 };
 use sum_tree::{Bias, Cursor, SumTree};
 use text::{Patch, Rope};
+use ui::{ActiveTheme, IntoElement as _, ParentElement as _, Styled as _, div};
 
 use super::{Highlights, custom_highlights::CustomHighlightsChunks};
 
@@ -252,6 +254,13 @@ pub struct InlayChunks<'a> {
     snapshot: &'a InlaySnapshot,
 }
 
+#[derive(Clone)]
+pub struct InlayChunk<'a> {
+    pub chunk: Chunk<'a>,
+    /// Whether the inlay should be customly rendered.
+    pub renderer: Option<ChunkRenderer>,
+}
+
 impl InlayChunks<'_> {
     pub fn seek(&mut self, new_range: Range<InlayOffset>) {
         self.transforms.seek(&new_range.start, Bias::Right, &());
@@ -271,7 +280,7 @@ impl InlayChunks<'_> {
 }
 
 impl<'a> Iterator for InlayChunks<'a> {
-    type Item = Chunk<'a>;
+    type Item = InlayChunk<'a>;
 
     fn next(&mut self) -> Option<Self::Item> {
         if self.output_offset == self.max_output_offset {
@@ -296,9 +305,12 @@ impl<'a> Iterator for InlayChunks<'a> {
 
                 chunk.text = suffix;
                 self.output_offset.0 += prefix.len();
-                Chunk {
-                    text: prefix,
-                    ..chunk.clone()
+                InlayChunk {
+                    chunk: Chunk {
+                        text: prefix,
+                        ..chunk.clone()
+                    },
+                    renderer: None,
                 }
             }
             Transform::Inlay(inlay) => {
@@ -313,6 +325,7 @@ impl<'a> Iterator for InlayChunks<'a> {
                     }
                 }
 
+                let mut renderer = None;
                 let mut highlight_style = match inlay.id {
                     InlayId::InlineCompletion(_) => {
                         self.highlight_styles.inline_completion.map(|s| {
@@ -325,14 +338,33 @@ impl<'a> Iterator for InlayChunks<'a> {
                     }
                     InlayId::Hint(_) => self.highlight_styles.inlay_hint,
                     InlayId::DebuggerValue(_) => self.highlight_styles.inlay_hint,
-                    InlayId::Color(_) => match inlay.color {
-                        Some(color) => {
-                            let mut style = self.highlight_styles.inlay_hint.unwrap_or_default();
-                            style.color = Some(color);
-                            Some(style)
+                    InlayId::Color(id) => {
+                        if let Some(color) = inlay.color {
+                            renderer = Some(ChunkRenderer {
+                                id: FoldId(id),
+                                render: Arc::new(move |cx| {
+                                    div()
+                                        .w_4()
+                                        .h_4()
+                                        .relative()
+                                        .child(
+                                            div()
+                                                .absolute()
+                                                .right_1()
+                                                .w_3p5()
+                                                .h_3p5()
+                                                .border_2()
+                                                .border_color(cx.theme().colors().border)
+                                                .bg(color),
+                                        )
+                                        .into_any_element()
+                                }),
+                                constrain_width: false,
+                                measured_width: None,
+                            });
                         }
-                        None => self.highlight_styles.inlay_hint,
-                    },
+                        self.highlight_styles.inlay_hint
+                    }
                 };
                 let next_inlay_highlight_endpoint;
                 let offset_in_inlay = self.output_offset - self.transforms.start().0;
@@ -370,11 +402,14 @@ impl<'a> Iterator for InlayChunks<'a> {
 
                 self.output_offset.0 += chunk.len();
 
-                Chunk {
-                    text: chunk,
-                    highlight_style,
-                    is_inlay: true,
-                    ..Default::default()
+                InlayChunk {
+                    chunk: Chunk {
+                        text: chunk,
+                        highlight_style,
+                        is_inlay: true,
+                        ..Chunk::default()
+                    },
+                    renderer,
                 }
             }
         };
@@ -1066,7 +1101,7 @@ impl InlaySnapshot {
     #[cfg(test)]
     pub fn text(&self) -> String {
         self.chunks(Default::default()..self.len(), false, Highlights::default())
-            .map(|chunk| chunk.text)
+            .map(|chunk| chunk.chunk.text)
             .collect()
     }
 
@@ -1704,7 +1739,7 @@ mod tests {
                             ..Highlights::default()
                         },
                     )
-                    .map(|chunk| chunk.text)
+                    .map(|chunk| chunk.chunk.text)
                     .collect::<String>();
                 assert_eq!(
                     actual_text,

crates/editor/src/editor.rs

@@ -547,6 +547,7 @@ pub enum SoftWrap {
 #[derive(Clone)]
 pub struct EditorStyle {
     pub background: Hsla,
+    pub border: Hsla,
     pub local_player: PlayerColor,
     pub text: TextStyle,
     pub scrollbar_width: Pixels,
@@ -562,6 +563,7 @@ impl Default for EditorStyle {
     fn default() -> Self {
         Self {
             background: Hsla::default(),
+            border: Hsla::default(),
             local_player: PlayerColor::default(),
             text: TextStyle::default(),
             scrollbar_width: Pixels::default(),
@@ -22405,6 +22407,7 @@ impl Render for Editor {
             &cx.entity(),
             EditorStyle {
                 background,
+                border: cx.theme().colors().border,
                 local_player: cx.theme().players().local(),
                 text: text_style,
                 scrollbar_width: EditorElement::SCROLLBAR_WIDTH,

crates/eval/src/example.rs

@@ -10,7 +10,7 @@ use crate::{
     ToolMetrics,
     assertions::{AssertionsReport, RanAssertion, RanAssertionResult},
 };
-use agent::{ContextLoadResult, Thread, ThreadEvent};
+use agent::{ThreadEvent, ZedAgentThread};
 use agent_settings::AgentProfileId;
 use anyhow::{Result, anyhow};
 use async_trait::async_trait;
@@ -89,7 +89,7 @@ impl Error for FailedAssertion {}
 pub struct ExampleContext {
     meta: ExampleMetadata,
     log_prefix: String,
-    agent_thread: Entity<agent::Thread>,
+    agent_thread: Entity<agent::ZedAgentThread>,
     app: AsyncApp,
     model: Arc<dyn LanguageModel>,
     pub assertions: AssertionsReport,
@@ -100,7 +100,7 @@ impl ExampleContext {
     pub fn new(
         meta: ExampleMetadata,
         log_prefix: String,
-        agent_thread: Entity<Thread>,
+        agent_thread: Entity<ZedAgentThread>,
         model: Arc<dyn LanguageModel>,
         app: AsyncApp,
     ) -> Self {
@@ -120,13 +120,7 @@ impl ExampleContext {
     pub fn push_user_message(&mut self, text: impl ToString) {
         self.app
             .update_entity(&self.agent_thread, |thread, cx| {
-                thread.insert_user_message(
-                    text.to_string(),
-                    ContextLoadResult::default(),
-                    None,
-                    Vec::new(),
-                    cx,
-                );
+                thread.insert_user_message(text.to_string(), cx);
             })
             .unwrap();
     }
@@ -250,6 +244,7 @@ impl ExampleContext {
                 | ThreadEvent::UsePendingTools { .. }
                 | ThreadEvent::CompletionCanceled => {}
                 ThreadEvent::ToolUseLimitReached => {}
+                ThreadEvent::StreamedToolUse2 { .. } => {}
                 ThreadEvent::ToolFinished {
                     tool_use_id,
                     pending_tool_use,
@@ -312,10 +307,10 @@ impl ExampleContext {
 
         let model = self.model.clone();
 
-        let message_count_before = self.app.update_entity(&self.agent_thread, |thread, cx| {
-            thread.set_remaining_turns(iterations);
-            thread.send_to_model(model, CompletionIntent::UserPrompt, None, cx);
-            thread.messages().len()
+        let message_count_before = self.app.update_entity(&self.agent_thread, |agent, cx| {
+            agent.set_remaining_turns(iterations);
+            agent.send_to_model(model, CompletionIntent::UserPrompt, None, cx);
+            agent.messages().len()
         })?;
 
         loop {
@@ -333,13 +328,13 @@ impl ExampleContext {
             }
         }
 
-        let messages = self.app.read_entity(&self.agent_thread, |thread, cx| {
+        let messages = self.app.read_entity(&self.agent_thread, |agent, cx| {
             let mut messages = Vec::new();
-            for message in thread.messages().skip(message_count_before) {
+            for message in agent.messages().skip(message_count_before) {
                 messages.push(Message {
                     _role: message.role,
                     text: message.to_string(),
-                    tool_use: thread
+                    tool_use: agent
                         .tool_uses_for_message(message.id, cx)
                         .into_iter()
                         .map(|tool_use| ToolUse {
@@ -387,7 +382,7 @@ impl ExampleContext {
             .unwrap()
     }
 
-    pub fn agent_thread(&self) -> Entity<Thread> {
+    pub fn agent_thread(&self) -> Entity<ZedAgentThread> {
         self.agent_thread.clone()
     }
 }

crates/eval/src/examples/comment_translation.rs

@@ -32,9 +32,9 @@ impl Example for CommentTranslation {
         cx.run_to_end().await?;
 
         let mut create_or_overwrite_count = 0;
-        cx.agent_thread().read_with(cx, |thread, cx| {
-            for message in thread.messages() {
-                for tool_use in thread.tool_uses_for_message(message.id, cx) {
+        cx.agent_thread().read_with(cx, |agent, cx| {
+            for message in agent.messages() {
+                for tool_use in agent.tool_uses_for_message(message.id, cx) {
                     if tool_use.name == "edit_file" {
                         let input: EditFileToolInput = serde_json::from_value(tool_use.input)?;
                         if !matches!(input.mode, EditFileMode::Edit) {

crates/eval/src/instance.rs

@@ -1,3 +1,4 @@
+use agent::thread::ToolUseSegment;
 use agent::{Message, MessageSegment, SerializedThread, ThreadStore};
 use anyhow::{Context as _, Result, anyhow, bail};
 use assistant_tool::ToolWorkingSet;
@@ -307,7 +308,7 @@ impl ExampleInstance {
             let thread_store = thread_store.await?;
 
 
-            let thread =
+            let agent =
                 thread_store.update(cx, |thread_store, cx| {
                     let thread = if let Some(json) = &meta.existing_thread_json {
                         let serialized = SerializedThread::from_json(json.as_bytes()).expect("Can't read serialized thread");
@@ -322,7 +323,7 @@ impl ExampleInstance {
                 })?;
 
 
-            thread.update(cx, |thread, _cx| {
+            agent.update(cx, |thread, _cx| {
                 let mut request_count = 0;
                 let previous_diff = Rc::new(RefCell::new("".to_string()));
                 let example_output_dir = this.run_directory.clone();
@@ -370,7 +371,7 @@ impl ExampleInstance {
             let mut example_cx = ExampleContext::new(
                 meta.clone(),
                 this.log_prefix.clone(),
-                thread.clone(),
+                agent.clone(),
                 model.clone(),
                 cx.clone(),
             );
@@ -419,11 +420,12 @@ impl ExampleInstance {
                 fs::write(this.run_directory.join("diagnostics_after.txt"), diagnostics_after)?;
             }
 
-            thread.update(cx, |thread, _cx| {
-                let response_count = thread
+            agent.update(cx, |agent, _cx| {
+                let response_count = agent
                     .messages()
                     .filter(|message| message.role == language_model::Role::Assistant)
                     .count();
+                let all_messages = messages_to_markdown(agent.messages());
                 RunOutput {
                     repository_diff,
                     diagnostic_summary_before,
@@ -431,9 +433,9 @@ impl ExampleInstance {
                     diagnostics_before,
                     diagnostics_after,
                     response_count,
-                    token_usage: thread.cumulative_token_usage(),
+                    token_usage: agent.cumulative_token_usage(),
                     tool_metrics: example_cx.tool_metrics.lock().unwrap().clone(),
-                    all_messages: messages_to_markdown(thread.messages()),
+                    all_messages,
                     programmatic_assertions: example_cx.assertions,
                 }
             })
@@ -848,11 +850,9 @@ fn messages_to_markdown<'a>(message_iter: impl IntoIterator<Item = &'a Message>)
                     messages.push_str(&text);
                     messages.push_str("\n");
                 }
-                MessageSegment::RedactedThinking(items) => {
-                    messages.push_str(&format!(
-                        "**Redacted Thinking**: {} item(s)\n\n",
-                        items.len()
-                    ));
+                MessageSegment::ToolUse(ToolUseSegment { name, input, .. }) => {
+                    messages.push_str(&format!("**Tool Use**: {}\n\n", name));
+                    messages.push_str(&format!("Input: {:?}\n\n", input));
                 }
             }
         }

crates/language_model/src/fake_provider.rs

@@ -2,7 +2,7 @@ use crate::{
     AuthenticateError, LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
     LanguageModelId, LanguageModelName, LanguageModelProvider, LanguageModelProviderId,
     LanguageModelProviderName, LanguageModelProviderState, LanguageModelRequest,
-    LanguageModelToolChoice,
+    LanguageModelToolChoice, LanguageModelToolUse, StopReason,
 };
 use futures::{FutureExt, StreamExt, channel::mpsc, future::BoxFuture, stream::BoxStream};
 use gpui::{AnyView, App, AsyncApp, Entity, Task, Window};
@@ -91,7 +91,12 @@ pub struct ToolUseRequest {
 
 #[derive(Default)]
 pub struct FakeLanguageModel {
-    current_completion_txs: Mutex<Vec<(LanguageModelRequest, mpsc::UnboundedSender<String>)>>,
+    current_completion_txs: Mutex<
+        Vec<(
+            LanguageModelRequest,
+            mpsc::UnboundedSender<LanguageModelCompletionEvent>,
+        )>,
+    >,
 }
 
 impl FakeLanguageModel {
@@ -110,7 +115,7 @@ impl FakeLanguageModel {
     pub fn stream_completion_response(
         &self,
         request: &LanguageModelRequest,
-        chunk: impl Into<String>,
+        stream: impl Into<FakeLanguageModelStream>,
     ) {
         let current_completion_txs = self.current_completion_txs.lock();
         let tx = current_completion_txs
@@ -118,7 +123,9 @@ impl FakeLanguageModel {
             .find(|(req, _)| req == request)
             .map(|(_, tx)| tx)
             .unwrap();
-        tx.unbounded_send(chunk.into()).unwrap();
+        for event in stream.into().events {
+            tx.unbounded_send(event).unwrap();
+        }
     }
 
     pub fn end_completion_stream(&self, request: &LanguageModelRequest) {
@@ -127,7 +134,7 @@ impl FakeLanguageModel {
             .retain(|(req, _)| req != request);
     }
 
-    pub fn stream_last_completion_response(&self, chunk: impl Into<String>) {
+    pub fn stream_last_completion_response(&self, chunk: impl Into<FakeLanguageModelStream>) {
         self.stream_completion_response(self.pending_completions().last().unwrap(), chunk);
     }
 
@@ -136,6 +143,29 @@ impl FakeLanguageModel {
     }
 }
 
+pub struct FakeLanguageModelStream {
+    events: Vec<LanguageModelCompletionEvent>,
+}
+
+impl<T: Into<String>> From<T> for FakeLanguageModelStream {
+    fn from(chunk: T) -> Self {
+        Self {
+            events: vec![LanguageModelCompletionEvent::Text(chunk.into())],
+        }
+    }
+}
+
+impl From<LanguageModelToolUse> for FakeLanguageModelStream {
+    fn from(tool_use: LanguageModelToolUse) -> Self {
+        Self {
+            events: vec![
+                LanguageModelCompletionEvent::ToolUse(tool_use),
+                LanguageModelCompletionEvent::Stop(StopReason::ToolUse),
+            ],
+        }
+    }
+}
+
 impl LanguageModel for FakeLanguageModel {
     fn id(&self) -> LanguageModelId {
         language_model_id()
@@ -190,12 +220,7 @@ impl LanguageModel for FakeLanguageModel {
     > {
         let (tx, rx) = mpsc::unbounded();
         self.current_completion_txs.lock().push((request, tx));
-        async move {
-            Ok(rx
-                .map(|text| Ok(LanguageModelCompletionEvent::Text(text)))
-                .boxed())
-        }
-        .boxed()
+        async move { Ok(rx.map(Ok).boxed()) }.boxed()
     }
 
     fn as_fake(&self) -> &Self {

crates/language_model/src/request.rs

@@ -330,6 +330,14 @@ impl MessageContent {
             | MessageContent::Image(_) => false,
         }
     }
+
+    #[cfg(any(test, feature = "test-support"))]
+    pub fn as_tool_result(&self) -> Option<&LanguageModelToolResult> {
+        match self {
+            MessageContent::ToolResult(tool_result) => Some(tool_result),
+            _ => None,
+        }
+    }
 }
 
 impl From<String> for MessageContent {
@@ -364,6 +372,40 @@ impl LanguageModelRequestMessage {
     pub fn contents_empty(&self) -> bool {
         self.content.iter().all(|content| content.is_empty())
     }
+
+    pub fn push(&mut self, content: MessageContent) {
+        if let Some(last_content) = self.content.last_mut() {
+            match (last_content, content) {
+                (MessageContent::Text(last_text), MessageContent::Text(new_text)) => {
+                    last_text.push_str(&new_text);
+                }
+                (
+                    MessageContent::Thinking {
+                        text: last_text,
+                        signature,
+                    },
+                    MessageContent::Thinking {
+                        text: new_text,
+                        signature: new_signature,
+                    },
+                ) => {
+                    last_text.push_str(&new_text);
+                    if signature.is_none() {
+                        *signature = new_signature;
+                    }
+                }
+                (
+                    MessageContent::RedactedThinking(last_text),
+                    MessageContent::RedactedThinking(new_text),
+                ) => {
+                    last_text.push_str(&new_text);
+                }
+                (_, content) => self.content.push(content),
+            }
+        } else {
+            self.content.push(content);
+        }
+    }
 }
 
 #[derive(Debug, PartialEq, Hash, Clone, Serialize, Deserialize)]

crates/migrator/src/migrations.rs

@@ -87,3 +87,9 @@ pub(crate) mod m_2025_06_25 {
 
     pub(crate) use settings::SETTINGS_PATTERNS;
 }
+
+pub(crate) mod m_2025_06_27 {
+    mod settings;
+
+    pub(crate) use settings::SETTINGS_PATTERNS;
+}

crates/migrator/src/migrations/m_2025_06_27/settings.rs

@@ -0,0 +1,133 @@
+use std::ops::Range;
+use tree_sitter::{Query, QueryMatch};
+
+use crate::MigrationPatterns;
+
+pub const SETTINGS_PATTERNS: MigrationPatterns = &[(
+    SETTINGS_CONTEXT_SERVER_PATTERN,
+    flatten_context_server_command,
+)];
+
+const SETTINGS_CONTEXT_SERVER_PATTERN: &str = r#"(document
+    (object
+        (pair
+            key: (string (string_content) @context-servers)
+            value: (object
+                (pair
+                    key: (string (string_content) @server-name)
+                    value: (object
+                        (pair
+                            key: (string (string_content) @source-key)
+                            value: (string (string_content) @source-value)
+                        )
+                        (pair
+                            key: (string (string_content) @command-key)
+                            value: (object) @command-object
+                        ) @command-pair
+                    ) @server-settings
+                )
+            )
+        )
+    )
+    (#eq? @context-servers "context_servers")
+    (#eq? @source-key "source")
+    (#eq? @source-value "custom")
+    (#eq? @command-key "command")
+)"#;
+
+fn flatten_context_server_command(
+    contents: &str,
+    mat: &QueryMatch,
+    query: &Query,
+) -> Option<(Range<usize>, String)> {
+    let command_pair_index = query.capture_index_for_name("command-pair")?;
+    let command_pair = mat.nodes_for_capture_index(command_pair_index).next()?;
+
+    let command_object_index = query.capture_index_for_name("command-object")?;
+    let command_object = mat.nodes_for_capture_index(command_object_index).next()?;
+
+    let server_settings_index = query.capture_index_for_name("server-settings")?;
+    let _server_settings = mat.nodes_for_capture_index(server_settings_index).next()?;
+
+    // Parse the command object to extract path, args, and env
+    let mut path_value = None;
+    let mut args_value = None;
+    let mut env_value = None;
+
+    let mut cursor = command_object.walk();
+    for child in command_object.children(&mut cursor) {
+        if child.kind() == "pair" {
+            if let Some(key_node) = child.child_by_field_name("key") {
+                if let Some(string_content) = key_node.child(1) {
+                    let key = &contents[string_content.byte_range()];
+                    if let Some(value_node) = child.child_by_field_name("value") {
+                        let value_range = value_node.byte_range();
+                        match key {
+                            "path" => path_value = Some(&contents[value_range]),
+                            "args" => args_value = Some(&contents[value_range]),
+                            "env" => env_value = Some(&contents[value_range]),
+                            _ => {}
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    let path = path_value?;
+
+    // Get the proper indentation from the command pair
+    let command_pair_start = command_pair.start_byte();
+    let line_start = contents[..command_pair_start]
+        .rfind('\n')
+        .map(|pos| pos + 1)
+        .unwrap_or(0);
+    let indent = &contents[line_start..command_pair_start];
+
+    // Build the replacement string
+    let mut replacement = format!("\"command\": {}", path);
+
+    // Add args if present - need to reduce indentation
+    if let Some(args) = args_value {
+        replacement.push_str(",\n");
+        replacement.push_str(indent);
+        replacement.push_str("\"args\": ");
+        let reduced_args = reduce_indentation(args, 4);
+        replacement.push_str(&reduced_args);
+    }
+
+    // Add env if present - need to reduce indentation
+    if let Some(env) = env_value {
+        replacement.push_str(",\n");
+        replacement.push_str(indent);
+        replacement.push_str("\"env\": ");
+        replacement.push_str(&reduce_indentation(env, 4));
+    }
+
+    let range_to_replace = command_pair.byte_range();
+    Some((range_to_replace, replacement))
+}
+
+fn reduce_indentation(text: &str, spaces: usize) -> String {
+    let lines: Vec<&str> = text.lines().collect();
+    let mut result = String::new();
+
+    for (i, line) in lines.iter().enumerate() {
+        if i > 0 {
+            result.push('\n');
+        }
+
+        // Count leading spaces
+        let leading_spaces = line.chars().take_while(|&c| c == ' ').count();
+
+        if leading_spaces >= spaces {
+            // Reduce indentation
+            result.push_str(&line[spaces..]);
+        } else {
+            // Keep line as is if it doesn't have enough indentation
+            result.push_str(line);
+        }
+    }
+
+    result
+}

crates/migrator/src/migrator.rs

@@ -156,6 +156,10 @@ pub fn migrate_settings(text: &str) -> Result<Option<String>> {
             migrations::m_2025_06_25::SETTINGS_PATTERNS,
             &SETTINGS_QUERY_2025_06_25,
         ),
+        (
+            migrations::m_2025_06_27::SETTINGS_PATTERNS,
+            &SETTINGS_QUERY_2025_06_27,
+        ),
     ];
     run_migrations(text, migrations)
 }
@@ -262,6 +266,10 @@ define_query!(
     SETTINGS_QUERY_2025_06_25,
     migrations::m_2025_06_25::SETTINGS_PATTERNS
 );
+define_query!(
+    SETTINGS_QUERY_2025_06_27,
+    migrations::m_2025_06_27::SETTINGS_PATTERNS
+);
 
 // custom query
 static EDIT_PREDICTION_SETTINGS_MIGRATION_QUERY: LazyLock<Query> = LazyLock::new(|| {
@@ -286,6 +294,15 @@ mod tests {
         pretty_assertions::assert_eq!(migrated.as_deref(), output);
     }
 
+    fn assert_migrate_settings_with_migrations(
+        migrations: &[(MigrationPatterns, &Query)],
+        input: &str,
+        output: Option<&str>,
+    ) {
+        let migrated = run_migrations(input, migrations).unwrap();
+        pretty_assertions::assert_eq!(migrated.as_deref(), output);
+    }
+
     #[test]
     fn test_replace_array_with_single_string() {
         assert_migrate_keymap(
@@ -873,7 +890,11 @@ mod tests {
 
     #[test]
     fn test_mcp_settings_migration() {
-        assert_migrate_settings(
+        assert_migrate_settings_with_migrations(
+            &[(
+                migrations::m_2025_06_16::SETTINGS_PATTERNS,
+                &SETTINGS_QUERY_2025_06_16,
+            )],
             r#"{
     "context_servers": {
         "empty_server": {},
@@ -1058,7 +1079,14 @@ mod tests {
         }
     }
 }"#;
-        assert_migrate_settings(settings, None);
+        assert_migrate_settings_with_migrations(
+            &[(
+                migrations::m_2025_06_16::SETTINGS_PATTERNS,
+                &SETTINGS_QUERY_2025_06_16,
+            )],
+            settings,
+            None,
+        );
     }
 
     #[test]
@@ -1131,4 +1159,100 @@ mod tests {
             None,
         );
     }
+
+    #[test]
+    fn test_flatten_context_server_command() {
+        assert_migrate_settings(
+            r#"{
+    "context_servers": {
+        "some-mcp-server": {
+            "source": "custom",
+            "command": {
+                "path": "npx",
+                "args": [
+                    "-y",
+                    "@supabase/mcp-server-supabase@latest",
+                    "--read-only",
+                    "--project-ref=<project-ref>"
+                ],
+                "env": {
+                    "SUPABASE_ACCESS_TOKEN": "<personal-access-token>"
+                }
+            }
+        }
+    }
+}"#,
+            Some(
+                r#"{
+    "context_servers": {
+        "some-mcp-server": {
+            "source": "custom",
+            "command": "npx",
+            "args": [
+                "-y",
+                "@supabase/mcp-server-supabase@latest",
+                "--read-only",
+                "--project-ref=<project-ref>"
+            ],
+            "env": {
+                "SUPABASE_ACCESS_TOKEN": "<personal-access-token>"
+            }
+        }
+    }
+}"#,
+            ),
+        );
+
+        // Test with additional keys in server object
+        assert_migrate_settings(
+            r#"{
+    "context_servers": {
+        "server-with-extras": {
+            "source": "custom",
+            "command": {
+                "path": "/usr/bin/node",
+                "args": ["server.js"]
+            },
+            "settings": {}
+        }
+    }
+}"#,
+            Some(
+                r#"{
+    "context_servers": {
+        "server-with-extras": {
+            "source": "custom",
+            "command": "/usr/bin/node",
+            "args": ["server.js"],
+            "settings": {}
+        }
+    }
+}"#,
+            ),
+        );
+
+        // Test command without args or env
+        assert_migrate_settings(
+            r#"{
+    "context_servers": {
+        "simple-server": {
+            "source": "custom",
+            "command": {
+                "path": "simple-mcp-server"
+            }
+        }
+    }
+}"#,
+            Some(
+                r#"{
+    "context_servers": {
+        "simple-server": {
+            "source": "custom",
+            "command": "simple-mcp-server"
+        }
+    }
+}"#,
+            ),
+        );
+    }
 }

crates/project/src/debugger/session.rs

@@ -1037,10 +1037,6 @@ impl Session {
         matches!(self.mode, Mode::Building)
     }
 
-    pub fn is_running(&self) -> bool {
-        matches!(self.mode, Mode::Running(_))
-    }
-
     pub fn as_running_mut(&mut self) -> Option<&mut RunningMode> {
         match &mut self.mode {
             Mode::Running(local_mode) => Some(local_mode),

crates/project/src/project_settings.rs

@@ -97,9 +97,8 @@ pub enum ContextServerSettings {
         /// Whether the context server is enabled.
         #[serde(default = "default_true")]
         enabled: bool,
-        /// The command to run this context server.
-        ///
-        /// This will override the command set by an extension.
+
+        #[serde(flatten)]
         command: ContextServerCommand,
     },
     Extension {

crates/settings/src/settings_store.rs

@@ -8,7 +8,7 @@ use gpui::{App, AsyncApp, BorrowAppContext, Global, Task, UpdateGlobal};
 use paths::{EDITORCONFIG_NAME, local_settings_file_relative_path, task_file_name};
 use schemars::{JsonSchema, r#gen::SchemaGenerator, schema::RootSchema};
 use serde::{Deserialize, Serialize, de::DeserializeOwned};
-use serde_json::Value;
+use serde_json::{Value, json};
 use smallvec::SmallVec;
 use std::{
     any::{Any, TypeId, type_name},
@@ -967,16 +967,38 @@ impl SettingsStore {
             }
         }
 
-        for release_stage in ["dev", "nightly", "stable", "preview"] {
-            let schema = combined_schema.schema.clone();
-            combined_schema
-                .schema
-                .object()
-                .properties
-                .insert(release_stage.to_string(), schema.into());
+        const ZED_SETTINGS: &str = "ZedSettings";
+        let RootSchema {
+            meta_schema,
+            schema: zed_settings_schema,
+            mut definitions,
+        } = combined_schema;
+        definitions.insert(ZED_SETTINGS.to_string(), zed_settings_schema.into());
+        let zed_settings_ref = Schema::new_ref(format!("#/definitions/{ZED_SETTINGS}"));
+
+        // settings file contents matches ZedSettings + overrides for each release stage
+        let mut root_schema = json!({
+            "allOf": [
+                zed_settings_ref,
+                {
+                    "properties": {
+                        "dev": zed_settings_ref,
+                        "nightly": zed_settings_ref,
+                        "stable": zed_settings_ref,
+                        "preview": zed_settings_ref,
+                    }
+                }
+            ],
+            "definitions": definitions,
+        });
+
+        if let Some(meta_schema) = meta_schema {
+            if let Some(root_schema_object) = root_schema.as_object_mut() {
+                root_schema_object.insert("$schema".to_string(), meta_schema.into());
+            }
         }
 
-        serde_json::to_value(&combined_schema).unwrap()
+        root_schema
     }
 
     fn recompute_values(

docs/src/languages/r.md

@@ -1,9 +1,14 @@
 # R
 
-R support is available through the [R extension](https://github.com/ocsmit/zed-r).
+R support is available via multiple R Zed extensions:
 
-- Tree-sitter: [r-lib/tree-sitter-r](https://github.com/r-lib/tree-sitter-r)
-- Language-Server: [REditorSupport/languageserver](https://github.com/REditorSupport/languageserver)
+- [ocsmit/zed-r](https://github.com/ocsmit/zed-r)
+
+  - Tree-sitter: [r-lib/tree-sitter-r](https://github.com/r-lib/tree-sitter-r)
+  - Language-Server: [REditorSupport/languageserver](https://github.com/REditorSupport/languageserver)
+
+- [posit-dev/air](https://github.com/posit-dev/air/tree/main/editors/zed)
+  - Language-Server: [posit-dev/air](https://github.com/posit-dev/air)
 
 ## Installation
 
@@ -15,7 +20,7 @@ install.packages("languageserver")
 install.packages("lintr")
 ```
 
-3. Install the [R Zed extension](https://github.com/ocsmit/zed-r) through Zed's extensions manager.
+3. Install the [ocsmit/zed-r](https://github.com/ocsmit/zed-r) through Zed's extensions manager.
 
 For example on macOS:
 
@@ -28,7 +33,65 @@ Rscript -e 'packageVersion("languageserver")'
 Rscript -e 'packageVersion("lintr")'
 ```
 
-## Ark Installation
+## Configuration
+
+### Linting
+
+`REditorSupport/languageserver` bundles support for [r-lib/lintr](https://github.com/r-lib/lintr) as a linter. This can be configured via the use of a `.lintr` inside your project (or in your home directory for global defaults).
+
+```r
+linters: linters_with_defaults(
+    line_length_linter(120),
+    commented_code_linter = NULL
+  )
+exclusions: list(
+    "inst/doc/creating_linters.R" = 1,
+    "inst/example/bad.R",
+    "tests/testthat/exclusions-test"
+  )
+```
+
+Or exclude it from linting anything,
+
+```r
+exclusions: list(".")
+```
+
+See [Using lintr](https://lintr.r-lib.org/articles/lintr.html) for a complete list of options,
+
+### Formatting
+
+`REditorSupport/languageserver` bundles support for [r-lib/styler](https://github.com/r-lib/styler) as a formatter. See [Customizing Styler](https://cran.r-project.org/web/packages/styler/vignettes/customizing_styler.html) for more information on how to customize its behavior.
+
+### REditorSupport/languageserver Configuration
+
+You can configure the [R languageserver settings](https://github.com/REditorSupport/languageserver#settings) via Zed Project Settings `.zed/settings.json` or Zed User Settings `~/.config/zed/settings.json`:
+
+For example to disable Lintr linting and suppress code snippet suggestions (both enabled by default):
+
+```json
+{
+  "lsp": {
+    "r_language_server": {
+      "settings": {
+        "r": {
+          "lsp": {
+            "diagnostics": false,
+            "snippet_support": false
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+<!--
+TBD: R REPL Docs
+
+## REPL
+
+### Ark Installation
 
 To use the Zed REPL with R you need to install [Ark](https://github.com/posit-dev/ark), an R Kernel for Jupyter applications.
 You can down the latest version from the [Ark GitHub Releases](https://github.com/posit-dev/ark/releases) and then extract the `ark` binary to a directory in your `PATH`.
@@ -56,6 +119,4 @@ unzip ark-latest-linux.zip ark
 sudo mv /tmp/ark /usr/local/bin/
 ```
 
-<!--
-TBD: R REPL Docs
 -->

docs/theme/css/general.css

@@ -79,20 +79,34 @@ h6 code {
   display: none !important;
 }
 
+h1 {
+  font-size: 3.4rem;
+}
+
 h2 {
   padding-bottom: 1rem;
   border-bottom: 1px solid;
   border-color: var(--border-light);
 }
 
-h2,
 h3 {
-  margin-block-start: 1.5em;
-  margin-block-end: 0;
+  font-size: 2rem;
 }
+
+h4 {
+  font-size: 1.8rem;
+}
+
+h5 {
+  font-size: 1.6rem;
+}
+
+h2,
+h3,
 h4,
 h5 {
-  margin-block-start: 2em;
+  margin-block-start: 1.5em;
+  margin-block-end: 0;
 }
 
 .header + .header h3,