1use crate::{
   2    ContextServerRegistry, DbLanguageModel, DbThread, SystemPromptTemplate, Template, Templates,
   3};
   4use acp_thread::{MentionUri, UserMessageId};
   5use action_log::ActionLog;
   6use agent::thread::{DetailedSummaryState, GitState, ProjectSnapshot, WorktreeSnapshot};
   7use agent_client_protocol as acp;
   8use agent_settings::{AgentProfileId, AgentSettings, CompletionMode, SUMMARIZE_THREAD_PROMPT};
   9use anyhow::{Context as _, Result, anyhow};
  10use assistant_tool::adapt_schema_to_format;
  11use chrono::{DateTime, Utc};
  12use cloud_llm_client::{CompletionIntent, CompletionRequestStatus};
  13use collections::IndexMap;
  14use fs::Fs;
  15use futures::{
  16    FutureExt,
  17    channel::{mpsc, oneshot},
  18    future::Shared,
  19    stream::FuturesUnordered,
  20};
  21use git::repository::DiffType;
  22use gpui::{App, AppContext, Context, Entity, SharedString, Task};
  23use language_model::{
  24    LanguageModel, LanguageModelCompletionEvent, LanguageModelImage, LanguageModelProviderId,
  25    LanguageModelRequest, LanguageModelRequestMessage, LanguageModelRequestTool,
  26    LanguageModelToolResult, LanguageModelToolResultContent, LanguageModelToolSchemaFormat,
  27    LanguageModelToolUse, LanguageModelToolUseId, MessageContent, Role, StopReason, TokenUsage,
  28};
  29use project::{
  30    Project,
  31    git_store::{GitStore, RepositoryState},
  32};
  33use prompt_store::ProjectContext;
  34use schemars::{JsonSchema, Schema};
  35use serde::{Deserialize, Serialize};
  36use settings::{Settings, update_settings_file};
  37use smol::stream::StreamExt;
  38use std::{cell::RefCell, collections::BTreeMap, path::Path, rc::Rc, sync::Arc};
  39use std::{fmt::Write, ops::Range};
  40use util::{ResultExt, markdown::MarkdownCodeBlock};
  41use uuid::Uuid;
  42
  43const TOOL_CANCELED_MESSAGE: &str = "Tool canceled by user";
  44
  45/// The ID of the user prompt that initiated a request.
  46///
  47/// This equates to the user physically submitting a message to the model (e.g., by pressing the Enter key).
  48#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Serialize, Deserialize)]
  49pub struct PromptId(Arc<str>);
  50
  51impl PromptId {
  52    pub fn new() -> Self {
  53        Self(Uuid::new_v4().to_string().into())
  54    }
  55}
  56
  57impl std::fmt::Display for PromptId {
  58    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
  59        write!(f, "{}", self.0)
  60    }
  61}
  62
  63#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
  64pub enum Message {
  65    User(UserMessage),
  66    Agent(AgentMessage),
  67    Resume,
  68}
  69
  70impl Message {
  71    pub fn as_agent_message(&self) -> Option<&AgentMessage> {
  72        match self {
  73            Message::Agent(agent_message) => Some(agent_message),
  74            _ => None,
  75        }
  76    }
  77
  78    pub fn to_request(&self) -> Vec<LanguageModelRequestMessage> {
  79        match self {
  80            Message::User(message) => vec![message.to_request()],
  81            Message::Agent(message) => message.to_request(),
  82            Message::Resume => vec![LanguageModelRequestMessage {
  83                role: Role::User,
  84                content: vec!["Continue where you left off".into()],
  85                cache: false,
  86            }],
  87        }
  88    }
  89
  90    pub fn to_markdown(&self) -> String {
  91        match self {
  92            Message::User(message) => message.to_markdown(),
  93            Message::Agent(message) => message.to_markdown(),
  94            Message::Resume => "[resumed after tool use limit was reached]".into(),
  95        }
  96    }
  97
  98    pub fn role(&self) -> Role {
  99        match self {
 100            Message::User(_) | Message::Resume => Role::User,
 101            Message::Agent(_) => Role::Assistant,
 102        }
 103    }
 104}
 105
 106#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 107pub struct UserMessage {
 108    pub id: UserMessageId,
 109    pub content: Vec<UserMessageContent>,
 110}
 111
 112#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 113pub enum UserMessageContent {
 114    Text(String),
 115    Mention { uri: MentionUri, content: String },
 116    Image(LanguageModelImage),
 117}
 118
 119impl UserMessage {
 120    pub fn to_markdown(&self) -> String {
 121        let mut markdown = String::from("## User\n\n");
 122
 123        for content in &self.content {
 124            match content {
 125                UserMessageContent::Text(text) => {
 126                    markdown.push_str(text);
 127                    markdown.push('\n');
 128                }
 129                UserMessageContent::Image(_) => {
 130                    markdown.push_str("<image />\n");
 131                }
 132                UserMessageContent::Mention { uri, content } => {
 133                    if !content.is_empty() {
 134                        let _ = write!(&mut markdown, "{}\n\n{}\n", uri.as_link(), content);
 135                    } else {
 136                        let _ = write!(&mut markdown, "{}\n", uri.as_link());
 137                    }
 138                }
 139            }
 140        }
 141
 142        markdown
 143    }
 144
 145    fn to_request(&self) -> LanguageModelRequestMessage {
 146        let mut message = LanguageModelRequestMessage {
 147            role: Role::User,
 148            content: Vec::with_capacity(self.content.len()),
 149            cache: false,
 150        };
 151
 152        const OPEN_CONTEXT: &str = "<context>\n\
 153            The following items were attached by the user. \
 154            They are up-to-date and don't need to be re-read.\n\n";
 155
 156        const OPEN_FILES_TAG: &str = "<files>";
 157        const OPEN_SYMBOLS_TAG: &str = "<symbols>";
 158        const OPEN_THREADS_TAG: &str = "<threads>";
 159        const OPEN_FETCH_TAG: &str = "<fetched_urls>";
 160        const OPEN_RULES_TAG: &str =
 161            "<rules>\nThe user has specified the following rules that should be applied:\n";
 162
 163        let mut file_context = OPEN_FILES_TAG.to_string();
 164        let mut symbol_context = OPEN_SYMBOLS_TAG.to_string();
 165        let mut thread_context = OPEN_THREADS_TAG.to_string();
 166        let mut fetch_context = OPEN_FETCH_TAG.to_string();
 167        let mut rules_context = OPEN_RULES_TAG.to_string();
 168
 169        for chunk in &self.content {
 170            let chunk = match chunk {
 171                UserMessageContent::Text(text) => {
 172                    language_model::MessageContent::Text(text.clone())
 173                }
 174                UserMessageContent::Image(value) => {
 175                    language_model::MessageContent::Image(value.clone())
 176                }
 177                UserMessageContent::Mention { uri, content } => {
 178                    match uri {
 179                        MentionUri::File { abs_path, .. } => {
 180                            write!(
 181                                &mut symbol_context,
 182                                "\n{}",
 183                                MarkdownCodeBlock {
 184                                    tag: &codeblock_tag(&abs_path, None),
 185                                    text: &content.to_string(),
 186                                }
 187                            )
 188                            .ok();
 189                        }
 190                        MentionUri::Symbol {
 191                            path, line_range, ..
 192                        }
 193                        | MentionUri::Selection {
 194                            path, line_range, ..
 195                        } => {
 196                            write!(
 197                                &mut rules_context,
 198                                "\n{}",
 199                                MarkdownCodeBlock {
 200                                    tag: &codeblock_tag(&path, Some(line_range)),
 201                                    text: &content
 202                                }
 203                            )
 204                            .ok();
 205                        }
 206                        MentionUri::Thread { .. } => {
 207                            write!(&mut thread_context, "\n{}\n", content).ok();
 208                        }
 209                        MentionUri::TextThread { .. } => {
 210                            write!(&mut thread_context, "\n{}\n", content).ok();
 211                        }
 212                        MentionUri::Rule { .. } => {
 213                            write!(
 214                                &mut rules_context,
 215                                "\n{}",
 216                                MarkdownCodeBlock {
 217                                    tag: "",
 218                                    text: &content
 219                                }
 220                            )
 221                            .ok();
 222                        }
 223                        MentionUri::Fetch { url } => {
 224                            write!(&mut fetch_context, "\nFetch: {}\n\n{}", url, content).ok();
 225                        }
 226                    }
 227
 228                    language_model::MessageContent::Text(uri.as_link().to_string())
 229                }
 230            };
 231
 232            message.content.push(chunk);
 233        }
 234
 235        let len_before_context = message.content.len();
 236
 237        if file_context.len() > OPEN_FILES_TAG.len() {
 238            file_context.push_str("</files>\n");
 239            message
 240                .content
 241                .push(language_model::MessageContent::Text(file_context));
 242        }
 243
 244        if symbol_context.len() > OPEN_SYMBOLS_TAG.len() {
 245            symbol_context.push_str("</symbols>\n");
 246            message
 247                .content
 248                .push(language_model::MessageContent::Text(symbol_context));
 249        }
 250
 251        if thread_context.len() > OPEN_THREADS_TAG.len() {
 252            thread_context.push_str("</threads>\n");
 253            message
 254                .content
 255                .push(language_model::MessageContent::Text(thread_context));
 256        }
 257
 258        if fetch_context.len() > OPEN_FETCH_TAG.len() {
 259            fetch_context.push_str("</fetched_urls>\n");
 260            message
 261                .content
 262                .push(language_model::MessageContent::Text(fetch_context));
 263        }
 264
 265        if rules_context.len() > OPEN_RULES_TAG.len() {
 266            rules_context.push_str("</user_rules>\n");
 267            message
 268                .content
 269                .push(language_model::MessageContent::Text(rules_context));
 270        }
 271
 272        if message.content.len() > len_before_context {
 273            message.content.insert(
 274                len_before_context,
 275                language_model::MessageContent::Text(OPEN_CONTEXT.into()),
 276            );
 277            message
 278                .content
 279                .push(language_model::MessageContent::Text("</context>".into()));
 280        }
 281
 282        message
 283    }
 284}
 285
 286fn codeblock_tag(full_path: &Path, line_range: Option<&Range<u32>>) -> String {
 287    let mut result = String::new();
 288
 289    if let Some(extension) = full_path.extension().and_then(|ext| ext.to_str()) {
 290        let _ = write!(result, "{} ", extension);
 291    }
 292
 293    let _ = write!(result, "{}", full_path.display());
 294
 295    if let Some(range) = line_range {
 296        if range.start == range.end {
 297            let _ = write!(result, ":{}", range.start + 1);
 298        } else {
 299            let _ = write!(result, ":{}-{}", range.start + 1, range.end + 1);
 300        }
 301    }
 302
 303    result
 304}
 305
 306impl AgentMessage {
 307    pub fn to_markdown(&self) -> String {
 308        let mut markdown = String::from("## Assistant\n\n");
 309
 310        for content in &self.content {
 311            match content {
 312                AgentMessageContent::Text(text) => {
 313                    markdown.push_str(text);
 314                    markdown.push('\n');
 315                }
 316                AgentMessageContent::Thinking { text, .. } => {
 317                    markdown.push_str("<think>");
 318                    markdown.push_str(text);
 319                    markdown.push_str("</think>\n");
 320                }
 321                AgentMessageContent::RedactedThinking(_) => {
 322                    markdown.push_str("<redacted_thinking />\n")
 323                }
 324                AgentMessageContent::ToolUse(tool_use) => {
 325                    markdown.push_str(&format!(
 326                        "**Tool Use**: {} (ID: {})\n",
 327                        tool_use.name, tool_use.id
 328                    ));
 329                    markdown.push_str(&format!(
 330                        "{}\n",
 331                        MarkdownCodeBlock {
 332                            tag: "json",
 333                            text: &format!("{:#}", tool_use.input)
 334                        }
 335                    ));
 336                }
 337            }
 338        }
 339
 340        for tool_result in self.tool_results.values() {
 341            markdown.push_str(&format!(
 342                "**Tool Result**: {} (ID: {})\n\n",
 343                tool_result.tool_name, tool_result.tool_use_id
 344            ));
 345            if tool_result.is_error {
 346                markdown.push_str("**ERROR:**\n");
 347            }
 348
 349            match &tool_result.content {
 350                LanguageModelToolResultContent::Text(text) => {
 351                    writeln!(markdown, "{text}\n").ok();
 352                }
 353                LanguageModelToolResultContent::Image(_) => {
 354                    writeln!(markdown, "<image />\n").ok();
 355                }
 356            }
 357
 358            if let Some(output) = tool_result.output.as_ref() {
 359                writeln!(
 360                    markdown,
 361                    "**Debug Output**:\n\n```json\n{}\n```\n",
 362                    serde_json::to_string_pretty(output).unwrap()
 363                )
 364                .unwrap();
 365            }
 366        }
 367
 368        markdown
 369    }
 370
 371    pub fn to_request(&self) -> Vec<LanguageModelRequestMessage> {
 372        let mut assistant_message = LanguageModelRequestMessage {
 373            role: Role::Assistant,
 374            content: Vec::with_capacity(self.content.len()),
 375            cache: false,
 376        };
 377        for chunk in &self.content {
 378            let chunk = match chunk {
 379                AgentMessageContent::Text(text) => {
 380                    language_model::MessageContent::Text(text.clone())
 381                }
 382                AgentMessageContent::Thinking { text, signature } => {
 383                    language_model::MessageContent::Thinking {
 384                        text: text.clone(),
 385                        signature: signature.clone(),
 386                    }
 387                }
 388                AgentMessageContent::RedactedThinking(value) => {
 389                    language_model::MessageContent::RedactedThinking(value.clone())
 390                }
 391                AgentMessageContent::ToolUse(value) => {
 392                    language_model::MessageContent::ToolUse(value.clone())
 393                }
 394            };
 395            assistant_message.content.push(chunk);
 396        }
 397
 398        let mut user_message = LanguageModelRequestMessage {
 399            role: Role::User,
 400            content: Vec::new(),
 401            cache: false,
 402        };
 403
 404        for tool_result in self.tool_results.values() {
 405            user_message
 406                .content
 407                .push(language_model::MessageContent::ToolResult(
 408                    tool_result.clone(),
 409                ));
 410        }
 411
 412        let mut messages = Vec::new();
 413        if !assistant_message.content.is_empty() {
 414            messages.push(assistant_message);
 415        }
 416        if !user_message.content.is_empty() {
 417            messages.push(user_message);
 418        }
 419        messages
 420    }
 421}
 422
 423#[derive(Default, Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 424pub struct AgentMessage {
 425    pub content: Vec<AgentMessageContent>,
 426    pub tool_results: IndexMap<LanguageModelToolUseId, LanguageModelToolResult>,
 427}
 428
 429#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 430pub enum AgentMessageContent {
 431    Text(String),
 432    Thinking {
 433        text: String,
 434        signature: Option<String>,
 435    },
 436    RedactedThinking(String),
 437    ToolUse(LanguageModelToolUse),
 438}
 439
 440#[derive(Debug)]
 441pub enum ThreadEvent {
 442    UserMessage(UserMessage),
 443    AgentText(String),
 444    AgentThinking(String),
 445    ToolCall(acp::ToolCall),
 446    ToolCallUpdate(acp_thread::ToolCallUpdate),
 447    ToolCallAuthorization(ToolCallAuthorization),
 448    TitleUpdate(SharedString),
 449    Stop(acp::StopReason),
 450}
 451
 452#[derive(Debug)]
 453pub struct ToolCallAuthorization {
 454    pub tool_call: acp::ToolCallUpdate,
 455    pub options: Vec<acp::PermissionOption>,
 456    pub response: oneshot::Sender<acp::PermissionOptionId>,
 457}
 458
 459enum ThreadTitle {
 460    None,
 461    Pending(Task<()>),
 462    Done(Result<SharedString>),
 463}
 464
 465impl ThreadTitle {
 466    pub fn unwrap_or_default(&self) -> SharedString {
 467        if let ThreadTitle::Done(Ok(title)) = self {
 468            title.clone()
 469        } else {
 470            "New Thread".into()
 471        }
 472    }
 473}
 474
 475pub struct Thread {
 476    id: acp::SessionId,
 477    prompt_id: PromptId,
 478    updated_at: DateTime<Utc>,
 479    title: ThreadTitle,
 480    summary: DetailedSummaryState,
 481    messages: Vec<Message>,
 482    completion_mode: CompletionMode,
 483    /// Holds the task that handles agent interaction until the end of the turn.
 484    /// Survives across multiple requests as the model performs tool calls and
 485    /// we run tools, report their results.
 486    running_turn: Option<RunningTurn>,
 487    pending_message: Option<AgentMessage>,
 488    tools: BTreeMap<SharedString, Arc<dyn AnyAgentTool>>,
 489    tool_use_limit_reached: bool,
 490    request_token_usage: Vec<TokenUsage>,
 491    cumulative_token_usage: TokenUsage,
 492    initial_project_snapshot: Shared<Task<Option<Arc<ProjectSnapshot>>>>,
 493    context_server_registry: Entity<ContextServerRegistry>,
 494    profile_id: AgentProfileId,
 495    project_context: Rc<RefCell<ProjectContext>>,
 496    templates: Arc<Templates>,
 497    model: Option<Arc<dyn LanguageModel>>,
 498    project: Entity<Project>,
 499    action_log: Entity<ActionLog>,
 500}
 501
 502impl Thread {
 503    pub fn new(
 504        id: acp::SessionId,
 505        project: Entity<Project>,
 506        project_context: Rc<RefCell<ProjectContext>>,
 507        context_server_registry: Entity<ContextServerRegistry>,
 508        action_log: Entity<ActionLog>,
 509        templates: Arc<Templates>,
 510        model: Option<Arc<dyn LanguageModel>>,
 511        cx: &mut Context<Self>,
 512    ) -> Self {
 513        let profile_id = AgentSettings::get_global(cx).default_profile.clone();
 514        Self {
 515            id,
 516            prompt_id: PromptId::new(),
 517            updated_at: Utc::now(),
 518            title: ThreadTitle::None,
 519            summary: DetailedSummaryState::default(),
 520            messages: Vec::new(),
 521            completion_mode: CompletionMode::Normal,
 522            running_turn: None,
 523            pending_message: None,
 524            tools: BTreeMap::default(),
 525            tool_use_limit_reached: false,
 526            request_token_usage: Vec::new(),
 527            cumulative_token_usage: TokenUsage::default(),
 528            initial_project_snapshot: {
 529                let project_snapshot = Self::project_snapshot(project.clone(), cx);
 530                cx.foreground_executor()
 531                    .spawn(async move { Some(project_snapshot.await) })
 532                    .shared()
 533            },
 534            context_server_registry,
 535            profile_id,
 536            project_context,
 537            templates,
 538            model,
 539            summarization_model,
 540            project,
 541            action_log,
 542        }
 543    }
 544
 545    #[cfg(any(test, feature = "test-support"))]
 546    pub fn test(
 547        model: Arc<dyn LanguageModel>,
 548        project: Entity<Project>,
 549        action_log: Entity<ActionLog>,
 550        cx: &mut Context<Self>,
 551    ) -> Self {
 552        use crate::generate_session_id;
 553
 554        let context_server_registry =
 555            cx.new(|cx| ContextServerRegistry::new(project.read(cx).context_server_store(), cx));
 556
 557        Self::new(
 558            generate_session_id(),
 559            project,
 560            Rc::default(),
 561            context_server_registry,
 562            action_log,
 563            Templates::new(),
 564            model,
 565            None,
 566            cx,
 567        )
 568    }
 569
 570    pub fn id(&self) -> &acp::SessionId {
 571        &self.id
 572    }
 573
 574    pub fn from_db(
 575        id: acp::SessionId,
 576        db_thread: DbThread,
 577        project: Entity<Project>,
 578        project_context: Rc<RefCell<ProjectContext>>,
 579        context_server_registry: Entity<ContextServerRegistry>,
 580        action_log: Entity<ActionLog>,
 581        templates: Arc<Templates>,
 582        model: Arc<dyn LanguageModel>,
 583        summarization_model: Option<Arc<dyn LanguageModel>>,
 584        cx: &mut Context<Self>,
 585    ) -> Self {
 586        let profile_id = db_thread
 587            .profile
 588            .unwrap_or_else(|| AgentSettings::get_global(cx).default_profile.clone());
 589        Self {
 590            id,
 591            prompt_id: PromptId::new(),
 592            title: ThreadTitle::Done(Ok(db_thread.title.clone())),
 593            summary: db_thread.summary,
 594            messages: db_thread.messages,
 595            completion_mode: CompletionMode::Normal,
 596            running_turn: None,
 597            pending_message: None,
 598            tools: BTreeMap::default(),
 599            tool_use_limit_reached: false,
 600            request_token_usage: db_thread.request_token_usage.clone(),
 601            cumulative_token_usage: db_thread.cumulative_token_usage.clone(),
 602            initial_project_snapshot: Task::ready(db_thread.initial_project_snapshot).shared(),
 603            context_server_registry,
 604            profile_id,
 605            project_context,
 606            templates,
 607            model,
 608            summarization_model,
 609            project,
 610            action_log,
 611            updated_at: db_thread.updated_at, // todo!(figure out if we can remove the "recently opened" list)
 612        }
 613    }
 614
 615    pub fn to_db(&self, cx: &App) -> Task<DbThread> {
 616        let initial_project_snapshot = self.initial_project_snapshot.clone();
 617        let mut thread = DbThread {
 618            title: self.title.unwrap_or_default(),
 619            messages: self.messages.clone(),
 620            updated_at: self.updated_at.clone(),
 621            summary: self.summary.clone(),
 622            initial_project_snapshot: None,
 623            cumulative_token_usage: self.cumulative_token_usage.clone(),
 624            request_token_usage: self.request_token_usage.clone(),
 625            model: Some(DbLanguageModel {
 626                provider: self.model.provider_id().to_string(),
 627                model: self.model.name().0.to_string(),
 628            }),
 629            completion_mode: Some(self.completion_mode.into()),
 630            profile: Some(self.profile_id.clone()),
 631        };
 632
 633        cx.background_spawn(async move {
 634            let initial_project_snapshot = initial_project_snapshot.await;
 635            thread.initial_project_snapshot = initial_project_snapshot;
 636            thread
 637        })
 638    }
 639
 640    pub fn replay(
 641        &mut self,
 642        cx: &mut Context<Self>,
 643    ) -> mpsc::UnboundedReceiver<Result<ThreadEvent>> {
 644        let (tx, rx) = mpsc::unbounded();
 645        let stream = ThreadEventStream(tx);
 646        for message in &self.messages {
 647            match message {
 648                Message::User(user_message) => stream.send_user_message(&user_message),
 649                Message::Agent(assistant_message) => {
 650                    for content in &assistant_message.content {
 651                        match content {
 652                            AgentMessageContent::Text(text) => stream.send_text(text),
 653                            AgentMessageContent::Thinking { text, .. } => {
 654                                stream.send_thinking(text)
 655                            }
 656                            AgentMessageContent::RedactedThinking(_) => {}
 657                            AgentMessageContent::ToolUse(tool_use) => {
 658                                self.replay_tool_call(
 659                                    tool_use,
 660                                    assistant_message.tool_results.get(&tool_use.id),
 661                                    &stream,
 662                                    cx,
 663                                );
 664                            }
 665                        }
 666                    }
 667                }
 668                Message::Resume => {}
 669            }
 670        }
 671        rx
 672    }
 673
 674    fn replay_tool_call(
 675        &self,
 676        tool_use: &LanguageModelToolUse,
 677        tool_result: Option<&LanguageModelToolResult>,
 678        stream: &ThreadEventStream,
 679        cx: &mut Context<Self>,
 680    ) {
 681        let Some(tool) = self.tools.get(tool_use.name.as_ref()) else {
 682            stream
 683                .0
 684                .unbounded_send(Ok(ThreadEvent::ToolCall(acp::ToolCall {
 685                    id: acp::ToolCallId(tool_use.id.to_string().into()),
 686                    title: tool_use.name.to_string(),
 687                    kind: acp::ToolKind::Other,
 688                    status: acp::ToolCallStatus::Failed,
 689                    content: Vec::new(),
 690                    locations: Vec::new(),
 691                    raw_input: Some(tool_use.input.clone()),
 692                    raw_output: None,
 693                })))
 694                .ok();
 695            return;
 696        };
 697
 698        let title = tool.initial_title(tool_use.input.clone());
 699        let kind = tool.kind();
 700        stream.send_tool_call(&tool_use.id, title, kind, tool_use.input.clone());
 701
 702        let output = tool_result
 703            .as_ref()
 704            .and_then(|result| result.output.clone());
 705        if let Some(output) = output.clone() {
 706            let tool_event_stream = ToolCallEventStream::new(
 707                tool_use.id.clone(),
 708                stream.clone(),
 709                Some(self.project.read(cx).fs().clone()),
 710            );
 711            tool.replay(tool_use.input.clone(), output, tool_event_stream, cx)
 712                .log_err();
 713        }
 714
 715        stream.update_tool_call_fields(
 716            &tool_use.id,
 717            acp::ToolCallUpdateFields {
 718                status: Some(acp::ToolCallStatus::Completed),
 719                raw_output: output,
 720                ..Default::default()
 721            },
 722        );
 723    }
 724
 725    /// Create a snapshot of the current project state including git information and unsaved buffers.
 726    fn project_snapshot(
 727        project: Entity<Project>,
 728        cx: &mut Context<Self>,
 729    ) -> Task<Arc<agent::thread::ProjectSnapshot>> {
 730        let git_store = project.read(cx).git_store().clone();
 731        let worktree_snapshots: Vec<_> = project
 732            .read(cx)
 733            .visible_worktrees(cx)
 734            .map(|worktree| Self::worktree_snapshot(worktree, git_store.clone(), cx))
 735            .collect();
 736
 737        cx.spawn(async move |_, cx| {
 738            let worktree_snapshots = futures::future::join_all(worktree_snapshots).await;
 739
 740            let mut unsaved_buffers = Vec::new();
 741            cx.update(|app_cx| {
 742                let buffer_store = project.read(app_cx).buffer_store();
 743                for buffer_handle in buffer_store.read(app_cx).buffers() {
 744                    let buffer = buffer_handle.read(app_cx);
 745                    if buffer.is_dirty() {
 746                        if let Some(file) = buffer.file() {
 747                            let path = file.path().to_string_lossy().to_string();
 748                            unsaved_buffers.push(path);
 749                        }
 750                    }
 751                }
 752            })
 753            .ok();
 754
 755            Arc::new(ProjectSnapshot {
 756                worktree_snapshots,
 757                unsaved_buffer_paths: unsaved_buffers,
 758                timestamp: Utc::now(),
 759            })
 760        })
 761    }
 762
 763    fn worktree_snapshot(
 764        worktree: Entity<project::Worktree>,
 765        git_store: Entity<GitStore>,
 766        cx: &App,
 767    ) -> Task<agent::thread::WorktreeSnapshot> {
 768        cx.spawn(async move |cx| {
 769            // Get worktree path and snapshot
 770            let worktree_info = cx.update(|app_cx| {
 771                let worktree = worktree.read(app_cx);
 772                let path = worktree.abs_path().to_string_lossy().to_string();
 773                let snapshot = worktree.snapshot();
 774                (path, snapshot)
 775            });
 776
 777            let Ok((worktree_path, _snapshot)) = worktree_info else {
 778                return WorktreeSnapshot {
 779                    worktree_path: String::new(),
 780                    git_state: None,
 781                };
 782            };
 783
 784            let git_state = git_store
 785                .update(cx, |git_store, cx| {
 786                    git_store
 787                        .repositories()
 788                        .values()
 789                        .find(|repo| {
 790                            repo.read(cx)
 791                                .abs_path_to_repo_path(&worktree.read(cx).abs_path())
 792                                .is_some()
 793                        })
 794                        .cloned()
 795                })
 796                .ok()
 797                .flatten()
 798                .map(|repo| {
 799                    repo.update(cx, |repo, _| {
 800                        let current_branch =
 801                            repo.branch.as_ref().map(|branch| branch.name().to_owned());
 802                        repo.send_job(None, |state, _| async move {
 803                            let RepositoryState::Local { backend, .. } = state else {
 804                                return GitState {
 805                                    remote_url: None,
 806                                    head_sha: None,
 807                                    current_branch,
 808                                    diff: None,
 809                                };
 810                            };
 811
 812                            let remote_url = backend.remote_url("origin");
 813                            let head_sha = backend.head_sha().await;
 814                            let diff = backend.diff(DiffType::HeadToWorktree).await.ok();
 815
 816                            GitState {
 817                                remote_url,
 818                                head_sha,
 819                                current_branch,
 820                                diff,
 821                            }
 822                        })
 823                    })
 824                });
 825
 826            let git_state = match git_state {
 827                Some(git_state) => match git_state.ok() {
 828                    Some(git_state) => git_state.await.ok(),
 829                    None => None,
 830                },
 831                None => None,
 832            };
 833
 834            WorktreeSnapshot {
 835                worktree_path,
 836                git_state,
 837            }
 838        })
 839    }
 840
 841    pub fn project(&self) -> &Entity<Project> {
 842        &self.project
 843    }
 844
 845    pub fn action_log(&self) -> &Entity<ActionLog> {
 846        &self.action_log
 847    }
 848
 849    pub fn model(&self) -> Option<&Arc<dyn LanguageModel>> {
 850        self.model.as_ref()
 851    }
 852
 853    pub fn set_model(&mut self, model: Arc<dyn LanguageModel>) {
 854        self.model = Some(model);
 855    }
 856
 857    pub fn completion_mode(&self) -> CompletionMode {
 858        self.completion_mode
 859    }
 860
 861    pub fn set_completion_mode(&mut self, mode: CompletionMode, cx: &mut Context<Self>) {
 862        self.completion_mode = mode;
 863        cx.notify()
 864    }
 865
 866    #[cfg(any(test, feature = "test-support"))]
 867    pub fn last_message(&self) -> Option<Message> {
 868        if let Some(message) = self.pending_message.clone() {
 869            Some(Message::Agent(message))
 870        } else {
 871            self.messages.last().cloned()
 872        }
 873    }
 874
 875    pub fn add_tool(&mut self, tool: impl AgentTool) {
 876        self.tools.insert(tool.name(), tool.erase());
 877    }
 878
 879    pub fn remove_tool(&mut self, name: &str) -> bool {
 880        self.tools.remove(name).is_some()
 881    }
 882
 883    pub fn profile(&self) -> &AgentProfileId {
 884        &self.profile_id
 885    }
 886
 887    pub fn set_profile(&mut self, profile_id: AgentProfileId) {
 888        self.profile_id = profile_id;
 889    }
 890
 891    pub fn cancel(&mut self, cx: &mut Context<Self>) {
 892        if let Some(running_turn) = self.running_turn.take() {
 893            running_turn.cancel();
 894        }
 895        self.flush_pending_message(cx);
 896    }
 897
 898    pub fn truncate(&mut self, message_id: UserMessageId, cx: &mut Context<Self>) -> Result<()> {
 899        self.cancel(cx);
 900        let Some(position) = self.messages.iter().position(
 901            |msg| matches!(msg, Message::User(UserMessage { id, .. }) if id == &message_id),
 902        ) else {
 903            return Err(anyhow!("Message not found"));
 904        };
 905        self.messages.truncate(position);
 906        cx.notify();
 907        Ok(())
 908    }
 909
 910    pub fn resume(
 911        &mut self,
 912        cx: &mut Context<Self>,
 913    ) -> Result<mpsc::UnboundedReceiver<Result<ThreadEvent>>> {
 914        anyhow::ensure!(
 915            self.tool_use_limit_reached,
 916            "can only resume after tool use limit is reached"
 917        );
 918
 919        self.messages.push(Message::Resume);
 920        cx.notify();
 921
 922        log::info!("Total messages in thread: {}", self.messages.len());
 923        self.run_turn(cx)
 924    }
 925
 926    /// Sending a message results in the model streaming a response, which could include tool calls.
 927    /// After calling tools, the model will stops and waits for any outstanding tool calls to be completed and their results sent.
 928    /// The returned channel will report all the occurrences in which the model stops before erroring or ending its turn.
 929    pub fn send<T>(
 930        &mut self,
 931        id: UserMessageId,
 932        content: impl IntoIterator<Item = T>,
 933        cx: &mut Context<Self>,
 934    ) -> mpsc::UnboundedReceiver<Result<ThreadEvent>>
 935    where
 936        T: Into<UserMessageContent>,
 937    {
 938        let model = self.model().context("No language model configured")?;
 939
 940        log::info!("Thread::send called with model: {:?}", model.name());
 941        self.advance_prompt_id();
 942
 943        let content = content.into_iter().map(Into::into).collect::<Vec<_>>();
 944        log::debug!("Thread::send content: {:?}", content);
 945
 946        self.messages
 947            .push(Message::User(UserMessage { id, content }));
 948        cx.notify();
 949
 950        log::info!("Total messages in thread: {}", self.messages.len());
 951        self.run_turn(cx)
 952    }
 953
 954    fn run_turn(&mut self, cx: &mut Context<Self>) -> mpsc::UnboundedReceiver<Result<ThreadEvent>> {
 955        self.cancel(cx);
 956
 957        let model = self.model.clone();
 958        let (events_tx, events_rx) = mpsc::unbounded::<Result<ThreadEvent>>();
 959        let event_stream = ThreadEventStream(events_tx);
 960        let message_ix = self.messages.len().saturating_sub(1);
 961        self.tool_use_limit_reached = false;
 962        self.running_turn = Some(RunningTurn {
 963            event_stream: event_stream.clone(),
 964            _task: cx.spawn(async move |this, cx| {
 965                log::info!("Starting agent turn execution");
 966                let turn_result: Result<()> = async {
 967                    let mut completion_intent = CompletionIntent::UserPrompt;
 968                    loop {
 969                        log::debug!(
 970                            "Building completion request with intent: {:?}",
 971                            completion_intent
 972                        );
 973                        let request = this.update(cx, |this, cx| {
 974                            this.build_completion_request(completion_intent, cx)
 975                        })??;
 976
 977                        log::info!("Calling model.stream_completion");
 978                        let mut events = model.stream_completion(request, cx).await?;
 979                        log::debug!("Stream completion started successfully");
 980
 981                        let mut tool_use_limit_reached = false;
 982                        let mut tool_uses = FuturesUnordered::new();
 983                        while let Some(event) = events.next().await {
 984                            match event? {
 985                                LanguageModelCompletionEvent::StatusUpdate(
 986                                    CompletionRequestStatus::ToolUseLimitReached,
 987                                ) => {
 988                                    tool_use_limit_reached = true;
 989                                }
 990                                LanguageModelCompletionEvent::Stop(reason) => {
 991                                    event_stream.send_stop(reason);
 992                                    if reason == StopReason::Refusal {
 993                                        this.update(cx, |this, cx| {
 994                                            this.flush_pending_message(cx);
 995                                            this.messages.truncate(message_ix);
 996                                        })?;
 997                                        return Ok(());
 998                                    }
 999                                }
1000                                event => {
1001                                    log::trace!("Received completion event: {:?}", event);
1002                                    this.update(cx, |this, cx| {
1003                                        tool_uses.extend(this.handle_streamed_completion_event(
1004                                            event,
1005                                            &event_stream,
1006                                            cx,
1007                                        ));
1008                                    })
1009                                    .ok();
1010                                }
1011                            }
1012                        }
1013
1014                        let used_tools = tool_uses.is_empty();
1015                        while let Some(tool_result) = tool_uses.next().await {
1016                            log::info!("Tool finished {:?}", tool_result);
1017
1018                            event_stream.update_tool_call_fields(
1019                                &tool_result.tool_use_id,
1020                                acp::ToolCallUpdateFields {
1021                                    status: Some(if tool_result.is_error {
1022                                        acp::ToolCallStatus::Failed
1023                                    } else {
1024                                        acp::ToolCallStatus::Completed
1025                                    }),
1026                                    raw_output: tool_result.output.clone(),
1027                                    ..Default::default()
1028                                },
1029                            );
1030                            this.update(cx, |this, _cx| {
1031                                this.pending_message()
1032                                    .tool_results
1033                                    .insert(tool_result.tool_use_id.clone(), tool_result);
1034                            })
1035                            .ok();
1036                        }
1037
1038                        if tool_use_limit_reached {
1039                            log::info!("Tool use limit reached, completing turn");
1040                            this.update(cx, |this, _cx| this.tool_use_limit_reached = true)?;
1041                            return Err(language_model::ToolUseLimitReachedError.into());
1042                        } else if used_tools {
1043                            log::info!("No tool uses found, completing turn");
1044                            return Ok(());
1045                        } else {
1046                            this.update(cx, |this, cx| this.flush_pending_message(cx))?;
1047                            completion_intent = CompletionIntent::ToolResults;
1048                        }
1049                    }
1050                }
1051                .await;
1052
1053                if let Err(error) = turn_result {
1054                    log::error!("Turn execution failed: {:?}", error);
1055                    event_stream.send_error(error);
1056                } else {
1057                    log::info!("Turn execution completed successfully");
1058                }
1059
1060                this.update(cx, |this, cx| {
1061                    this.flush_pending_message(cx);
1062                    this.running_turn.take();
1063                })
1064                .ok();
1065            }),
1066        });
1067        Ok(events_rx)
1068    }
1069
1070    pub fn generate_title_if_needed(&mut self, cx: &mut Context<Self>) {
1071        if !matches!(self.title, ThreadTitle::None) {
1072            return;
1073        }
1074
1075        // todo!() copy logic from agent1 re: tool calls, etc.?
1076        if self.messages.len() < 2 {
1077            return;
1078        }
1079
1080        self.generate_title(cx);
1081    }
1082
1083    fn generate_title(&mut self, cx: &mut Context<Self>) {
1084        let Some(model) = self.summarization_model.clone() else {
1085            println!("No thread summary model");
1086            return;
1087        };
1088        let mut request = LanguageModelRequest {
1089            intent: Some(CompletionIntent::ThreadSummarization),
1090            temperature: AgentSettings::temperature_for_model(&model, cx),
1091            ..Default::default()
1092        };
1093
1094        for message in &self.messages {
1095            request.messages.extend(message.to_request());
1096        }
1097
1098        request.messages.push(LanguageModelRequestMessage {
1099            role: Role::User,
1100            content: vec![MessageContent::Text(SUMMARIZE_THREAD_PROMPT.into())],
1101            cache: false,
1102        });
1103
1104        let task = cx.spawn(async move |this, cx| {
1105            let result = async {
1106                let mut messages = model.stream_completion(request, &cx).await?;
1107
1108                let mut new_summary = String::new();
1109                while let Some(event) = messages.next().await {
1110                    let Ok(event) = event else {
1111                        continue;
1112                    };
1113                    let text = match event {
1114                        LanguageModelCompletionEvent::Text(text) => text,
1115                        LanguageModelCompletionEvent::StatusUpdate(
1116                            CompletionRequestStatus::UsageUpdated { .. },
1117                        ) => {
1118                            // this.update(cx, |thread, cx| {
1119                            //     thread.update_model_request_usage(amount as u32, limit, cx);
1120                            // })?;
1121                            // todo!()? not sure if this is the right place to do this.
1122                            continue;
1123                        }
1124                        _ => continue,
1125                    };
1126
1127                    let mut lines = text.lines();
1128                    new_summary.extend(lines.next());
1129
1130                    // Stop if the LLM generated multiple lines.
1131                    if lines.next().is_some() {
1132                        break;
1133                    }
1134                }
1135
1136                anyhow::Ok(new_summary.into())
1137            }
1138            .await;
1139
1140            this.update(cx, |this, cx| {
1141                this.title = ThreadTitle::Done(result);
1142                cx.notify();
1143            })
1144            .log_err();
1145        });
1146
1147        self.title = ThreadTitle::Pending(task);
1148    }
1149
1150    pub fn build_system_message(&self) -> LanguageModelRequestMessage {
1151        log::debug!("Building system message");
1152        let prompt = SystemPromptTemplate {
1153            project: &self.project_context.borrow(),
1154            available_tools: self.tools.keys().cloned().collect(),
1155        }
1156        .render(&self.templates)
1157        .context("failed to build system prompt")
1158        .expect("Invalid template");
1159        log::debug!("System message built");
1160        LanguageModelRequestMessage {
1161            role: Role::System,
1162            content: vec![prompt.into()],
1163            cache: true,
1164        }
1165    }
1166
1167    /// A helper method that's called on every streamed completion event.
1168    /// Returns an optional tool result task, which the main agentic loop in
1169    /// send will send back to the model when it resolves.
1170    fn handle_streamed_completion_event(
1171        &mut self,
1172        event: LanguageModelCompletionEvent,
1173        event_stream: &ThreadEventStream,
1174        cx: &mut Context<Self>,
1175    ) -> Option<Task<LanguageModelToolResult>> {
1176        log::trace!("Handling streamed completion event: {:?}", event);
1177        use LanguageModelCompletionEvent::*;
1178
1179        match event {
1180            StartMessage { .. } => {
1181                self.flush_pending_message(cx);
1182                self.pending_message = Some(AgentMessage::default());
1183            }
1184            Text(new_text) => self.handle_text_event(new_text, event_stream, cx),
1185            Thinking { text, signature } => {
1186                self.handle_thinking_event(text, signature, event_stream, cx)
1187            }
1188            RedactedThinking { data } => self.handle_redacted_thinking_event(data, cx),
1189            ToolUse(tool_use) => {
1190                return self.handle_tool_use_event(tool_use, event_stream, cx);
1191            }
1192            ToolUseJsonParseError {
1193                id,
1194                tool_name,
1195                raw_input,
1196                json_parse_error,
1197            } => {
1198                return Some(Task::ready(self.handle_tool_use_json_parse_error_event(
1199                    id,
1200                    tool_name,
1201                    raw_input,
1202                    json_parse_error,
1203                )));
1204            }
1205            UsageUpdate(_) | StatusUpdate(_) => {}
1206            Stop(_) => unreachable!(),
1207        }
1208
1209        None
1210    }
1211
1212    fn handle_text_event(
1213        &mut self,
1214        new_text: String,
1215        event_stream: &ThreadEventStream,
1216        cx: &mut Context<Self>,
1217    ) {
1218        event_stream.send_text(&new_text);
1219
1220        let last_message = self.pending_message();
1221        if let Some(AgentMessageContent::Text(text)) = last_message.content.last_mut() {
1222            text.push_str(&new_text);
1223        } else {
1224            last_message
1225                .content
1226                .push(AgentMessageContent::Text(new_text));
1227        }
1228
1229        cx.notify();
1230    }
1231
1232    fn handle_thinking_event(
1233        &mut self,
1234        new_text: String,
1235        new_signature: Option<String>,
1236        event_stream: &ThreadEventStream,
1237        cx: &mut Context<Self>,
1238    ) {
1239        event_stream.send_thinking(&new_text);
1240
1241        let last_message = self.pending_message();
1242        if let Some(AgentMessageContent::Thinking { text, signature }) =
1243            last_message.content.last_mut()
1244        {
1245            text.push_str(&new_text);
1246            *signature = new_signature.or(signature.take());
1247        } else {
1248            last_message.content.push(AgentMessageContent::Thinking {
1249                text: new_text,
1250                signature: new_signature,
1251            });
1252        }
1253
1254        cx.notify();
1255    }
1256
1257    fn handle_redacted_thinking_event(&mut self, data: String, cx: &mut Context<Self>) {
1258        let last_message = self.pending_message();
1259        last_message
1260            .content
1261            .push(AgentMessageContent::RedactedThinking(data));
1262        cx.notify();
1263    }
1264
1265    fn handle_tool_use_event(
1266        &mut self,
1267        tool_use: LanguageModelToolUse,
1268        event_stream: &ThreadEventStream,
1269        cx: &mut Context<Self>,
1270    ) -> Option<Task<LanguageModelToolResult>> {
1271        cx.notify();
1272
1273        let tool = self.tools.get(tool_use.name.as_ref()).cloned();
1274        let mut title = SharedString::from(&tool_use.name);
1275        let mut kind = acp::ToolKind::Other;
1276        if let Some(tool) = tool.as_ref() {
1277            title = tool.initial_title(tool_use.input.clone());
1278            kind = tool.kind();
1279        }
1280
1281        // Ensure the last message ends in the current tool use
1282        let last_message = self.pending_message();
1283        let push_new_tool_use = last_message.content.last_mut().map_or(true, |content| {
1284            if let AgentMessageContent::ToolUse(last_tool_use) = content {
1285                if last_tool_use.id == tool_use.id {
1286                    *last_tool_use = tool_use.clone();
1287                    false
1288                } else {
1289                    true
1290                }
1291            } else {
1292                true
1293            }
1294        });
1295
1296        if push_new_tool_use {
1297            event_stream.send_tool_call(&tool_use.id, title, kind, tool_use.input.clone());
1298            last_message
1299                .content
1300                .push(AgentMessageContent::ToolUse(tool_use.clone()));
1301        } else {
1302            event_stream.update_tool_call_fields(
1303                &tool_use.id,
1304                acp::ToolCallUpdateFields {
1305                    title: Some(title.into()),
1306                    kind: Some(kind),
1307                    raw_input: Some(tool_use.input.clone()),
1308                    ..Default::default()
1309                },
1310            );
1311        }
1312
1313        if !tool_use.is_input_complete {
1314            return None;
1315        }
1316
1317        let Some(tool) = tool else {
1318            let content = format!("No tool named {} exists", tool_use.name);
1319            return Some(Task::ready(LanguageModelToolResult {
1320                content: LanguageModelToolResultContent::Text(Arc::from(content)),
1321                tool_use_id: tool_use.id,
1322                tool_name: tool_use.name,
1323                is_error: true,
1324                output: None,
1325            }));
1326        };
1327
1328        let fs = self.project.read(cx).fs().clone();
1329        let tool_event_stream =
1330            ToolCallEventStream::new(tool_use.id.clone(), event_stream.clone(), Some(fs));
1331        tool_event_stream.update_fields(acp::ToolCallUpdateFields {
1332            status: Some(acp::ToolCallStatus::InProgress),
1333            ..Default::default()
1334        });
1335        let supports_images = self.model().map_or(false, |model| model.supports_images());
1336        let tool_result = tool.run(tool_use.input, tool_event_stream, cx);
1337        log::info!("Running tool {}", tool_use.name);
1338        Some(cx.foreground_executor().spawn(async move {
1339            let tool_result = tool_result.await.and_then(|output| {
1340                if let LanguageModelToolResultContent::Image(_) = &output.llm_output {
1341                    if !supports_images {
1342                        return Err(anyhow!(
1343                            "Attempted to read an image, but this model doesn't support it.",
1344                        ));
1345                    }
1346                }
1347                Ok(output)
1348            });
1349
1350            match tool_result {
1351                Ok(output) => LanguageModelToolResult {
1352                    tool_use_id: tool_use.id,
1353                    tool_name: tool_use.name,
1354                    is_error: false,
1355                    content: output.llm_output,
1356                    output: Some(output.raw_output),
1357                },
1358                Err(error) => LanguageModelToolResult {
1359                    tool_use_id: tool_use.id,
1360                    tool_name: tool_use.name,
1361                    is_error: true,
1362                    content: LanguageModelToolResultContent::Text(Arc::from(error.to_string())),
1363                    output: None,
1364                },
1365            }
1366        }))
1367    }
1368
1369    fn handle_tool_use_json_parse_error_event(
1370        &mut self,
1371        tool_use_id: LanguageModelToolUseId,
1372        tool_name: Arc<str>,
1373        raw_input: Arc<str>,
1374        json_parse_error: String,
1375    ) -> LanguageModelToolResult {
1376        let tool_output = format!("Error parsing input JSON: {json_parse_error}");
1377        LanguageModelToolResult {
1378            tool_use_id,
1379            tool_name,
1380            is_error: true,
1381            content: LanguageModelToolResultContent::Text(tool_output.into()),
1382            output: Some(serde_json::Value::String(raw_input.to_string())),
1383        }
1384    }
1385
1386    fn pending_message(&mut self) -> &mut AgentMessage {
1387        self.pending_message.get_or_insert_default()
1388    }
1389
1390    fn flush_pending_message(&mut self, cx: &mut Context<Self>) {
1391        let Some(mut message) = self.pending_message.take() else {
1392            return;
1393        };
1394
1395        for content in &message.content {
1396            let AgentMessageContent::ToolUse(tool_use) = content else {
1397                continue;
1398            };
1399
1400            if !message.tool_results.contains_key(&tool_use.id) {
1401                message.tool_results.insert(
1402                    tool_use.id.clone(),
1403                    LanguageModelToolResult {
1404                        tool_use_id: tool_use.id.clone(),
1405                        tool_name: tool_use.name.clone(),
1406                        is_error: true,
1407                        content: LanguageModelToolResultContent::Text(TOOL_CANCELED_MESSAGE.into()),
1408                        output: None,
1409                    },
1410                );
1411            }
1412        }
1413
1414        self.messages.push(Message::Agent(message));
1415        cx.notify()
1416    }
1417
1418    pub(crate) fn build_completion_request(
1419        &self,
1420        completion_intent: CompletionIntent,
1421        cx: &mut App,
1422    ) -> Result<LanguageModelRequest> {
1423        let model = self.model().context("No language model configured")?;
1424
1425        log::debug!("Building completion request");
1426        log::debug!("Completion intent: {:?}", completion_intent);
1427        log::debug!("Completion mode: {:?}", self.completion_mode);
1428
1429        let messages = self.build_request_messages();
1430        log::info!("Request will include {} messages", messages.len());
1431
1432        let tools = if let Some(tools) = self.tools(cx).log_err() {
1433            tools
1434                .filter_map(|tool| {
1435                    let tool_name = tool.name().to_string();
1436                    log::trace!("Including tool: {}", tool_name);
1437                    Some(LanguageModelRequestTool {
1438                        name: tool_name,
1439                        description: tool.description().to_string(),
1440                        input_schema: tool.input_schema(model.tool_input_format()).log_err()?,
1441                    })
1442                })
1443                .collect()
1444        } else {
1445            Vec::new()
1446        };
1447
1448        log::info!("Request includes {} tools", tools.len());
1449
1450        let request = LanguageModelRequest {
1451            thread_id: Some(self.id.to_string()),
1452            prompt_id: Some(self.prompt_id.to_string()),
1453            intent: Some(completion_intent),
1454            mode: Some(self.completion_mode.into()),
1455            messages,
1456            tools,
1457            tool_choice: None,
1458            stop: Vec::new(),
1459            temperature: AgentSettings::temperature_for_model(&model, cx),
1460            thinking_allowed: true,
1461        };
1462
1463        log::debug!("Completion request built successfully");
1464        Ok(request)
1465    }
1466
1467    fn tools<'a>(&'a self, cx: &'a App) -> Result<impl Iterator<Item = &'a Arc<dyn AnyAgentTool>>> {
1468        let model = self.model().context("No language model configured")?;
1469
1470        let profile = AgentSettings::get_global(cx)
1471            .profiles
1472            .get(&self.profile_id)
1473            .context("profile not found")?;
1474        let provider_id = model.provider_id();
1475
1476        Ok(self
1477            .tools
1478            .iter()
1479            .filter(move |(_, tool)| tool.supported_provider(&provider_id))
1480            .filter_map(|(tool_name, tool)| {
1481                if profile.is_tool_enabled(tool_name) {
1482                    Some(tool)
1483                } else {
1484                    None
1485                }
1486            })
1487            .chain(self.context_server_registry.read(cx).servers().flat_map(
1488                |(server_id, tools)| {
1489                    tools.iter().filter_map(|(tool_name, tool)| {
1490                        if profile.is_context_server_tool_enabled(&server_id.0, tool_name) {
1491                            Some(tool)
1492                        } else {
1493                            None
1494                        }
1495                    })
1496                },
1497            )))
1498    }
1499
1500    fn build_request_messages(&self) -> Vec<LanguageModelRequestMessage> {
1501        log::trace!(
1502            "Building request messages from {} thread messages",
1503            self.messages.len()
1504        );
1505        let mut messages = vec![self.build_system_message()];
1506        for message in &self.messages {
1507            messages.extend(message.to_request());
1508        }
1509
1510        if let Some(message) = self.pending_message.as_ref() {
1511            messages.extend(message.to_request());
1512        }
1513
1514        if let Some(last_user_message) = messages
1515            .iter_mut()
1516            .rev()
1517            .find(|message| message.role == Role::User)
1518        {
1519            last_user_message.cache = true;
1520        }
1521
1522        messages
1523    }
1524
1525    pub fn to_markdown(&self) -> String {
1526        let mut markdown = String::new();
1527        for (ix, message) in self.messages.iter().enumerate() {
1528            if ix > 0 {
1529                markdown.push('\n');
1530            }
1531            markdown.push_str(&message.to_markdown());
1532        }
1533
1534        if let Some(message) = self.pending_message.as_ref() {
1535            markdown.push('\n');
1536            markdown.push_str(&message.to_markdown());
1537        }
1538
1539        markdown
1540    }
1541
1542    fn advance_prompt_id(&mut self) {
1543        self.prompt_id = PromptId::new();
1544    }
1545}
1546
1547struct RunningTurn {
1548    /// Holds the task that handles agent interaction until the end of the turn.
1549    /// Survives across multiple requests as the model performs tool calls and
1550    /// we run tools, report their results.
1551    _task: Task<()>,
1552    /// The current event stream for the running turn. Used to report a final
1553    /// cancellation event if we cancel the turn.
1554    event_stream: ThreadEventStream,
1555}
1556
1557impl RunningTurn {
1558    fn cancel(self) {
1559        log::debug!("Cancelling in progress turn");
1560        self.event_stream.send_canceled();
1561    }
1562}
1563
1564pub trait AgentTool
1565where
1566    Self: 'static + Sized,
1567{
1568    type Input: for<'de> Deserialize<'de> + Serialize + JsonSchema;
1569    type Output: for<'de> Deserialize<'de> + Serialize + Into<LanguageModelToolResultContent>;
1570
1571    fn name(&self) -> SharedString;
1572
1573    fn description(&self) -> SharedString {
1574        let schema = schemars::schema_for!(Self::Input);
1575        SharedString::new(
1576            schema
1577                .get("description")
1578                .and_then(|description| description.as_str())
1579                .unwrap_or_default(),
1580        )
1581    }
1582
1583    fn kind(&self) -> acp::ToolKind;
1584
1585    /// The initial tool title to display. Can be updated during the tool run.
1586    fn initial_title(&self, input: Result<Self::Input, serde_json::Value>) -> SharedString;
1587
1588    /// Returns the JSON schema that describes the tool's input.
1589    fn input_schema(&self) -> Schema {
1590        schemars::schema_for!(Self::Input)
1591    }
1592
1593    /// Some tools rely on a provider for the underlying billing or other reasons.
1594    /// Allow the tool to check if they are compatible, or should be filtered out.
1595    fn supported_provider(&self, _provider: &LanguageModelProviderId) -> bool {
1596        true
1597    }
1598
1599    /// Runs the tool with the provided input.
1600    fn run(
1601        self: Arc<Self>,
1602        input: Self::Input,
1603        event_stream: ToolCallEventStream,
1604        cx: &mut App,
1605    ) -> Task<Result<Self::Output>>;
1606
1607    /// Emits events for a previous execution of the tool.
1608    fn replay(
1609        &self,
1610        _input: Self::Input,
1611        _output: Self::Output,
1612        _event_stream: ToolCallEventStream,
1613        _cx: &mut App,
1614    ) -> Result<()> {
1615        Ok(())
1616    }
1617
1618    fn erase(self) -> Arc<dyn AnyAgentTool> {
1619        Arc::new(Erased(Arc::new(self)))
1620    }
1621}
1622
1623pub struct Erased<T>(T);
1624
1625pub struct AgentToolOutput {
1626    pub llm_output: LanguageModelToolResultContent,
1627    pub raw_output: serde_json::Value,
1628}
1629
1630pub trait AnyAgentTool {
1631    fn name(&self) -> SharedString;
1632    fn description(&self) -> SharedString;
1633    fn kind(&self) -> acp::ToolKind;
1634    fn initial_title(&self, input: serde_json::Value) -> SharedString;
1635    fn input_schema(&self, format: LanguageModelToolSchemaFormat) -> Result<serde_json::Value>;
1636    fn supported_provider(&self, _provider: &LanguageModelProviderId) -> bool {
1637        true
1638    }
1639    fn run(
1640        self: Arc<Self>,
1641        input: serde_json::Value,
1642        event_stream: ToolCallEventStream,
1643        cx: &mut App,
1644    ) -> Task<Result<AgentToolOutput>>;
1645    fn replay(
1646        &self,
1647        input: serde_json::Value,
1648        output: serde_json::Value,
1649        event_stream: ToolCallEventStream,
1650        cx: &mut App,
1651    ) -> Result<()>;
1652}
1653
1654impl<T> AnyAgentTool for Erased<Arc<T>>
1655where
1656    T: AgentTool,
1657{
1658    fn name(&self) -> SharedString {
1659        self.0.name()
1660    }
1661
1662    fn description(&self) -> SharedString {
1663        self.0.description()
1664    }
1665
1666    fn kind(&self) -> agent_client_protocol::ToolKind {
1667        self.0.kind()
1668    }
1669
1670    fn initial_title(&self, input: serde_json::Value) -> SharedString {
1671        let parsed_input = serde_json::from_value(input.clone()).map_err(|_| input);
1672        self.0.initial_title(parsed_input)
1673    }
1674
1675    fn input_schema(&self, format: LanguageModelToolSchemaFormat) -> Result<serde_json::Value> {
1676        let mut json = serde_json::to_value(self.0.input_schema())?;
1677        adapt_schema_to_format(&mut json, format)?;
1678        Ok(json)
1679    }
1680
1681    fn supported_provider(&self, provider: &LanguageModelProviderId) -> bool {
1682        self.0.supported_provider(provider)
1683    }
1684
1685    fn run(
1686        self: Arc<Self>,
1687        input: serde_json::Value,
1688        event_stream: ToolCallEventStream,
1689        cx: &mut App,
1690    ) -> Task<Result<AgentToolOutput>> {
1691        cx.spawn(async move |cx| {
1692            let input = serde_json::from_value(input)?;
1693            let output = cx
1694                .update(|cx| self.0.clone().run(input, event_stream, cx))?
1695                .await?;
1696            let raw_output = serde_json::to_value(&output)?;
1697            Ok(AgentToolOutput {
1698                llm_output: output.into(),
1699                raw_output,
1700            })
1701        })
1702    }
1703
1704    fn replay(
1705        &self,
1706        input: serde_json::Value,
1707        output: serde_json::Value,
1708        event_stream: ToolCallEventStream,
1709        cx: &mut App,
1710    ) -> Result<()> {
1711        let input = serde_json::from_value(input)?;
1712        let output = serde_json::from_value(output)?;
1713        self.0.replay(input, output, event_stream, cx)
1714    }
1715}
1716
1717#[derive(Clone)]
1718struct ThreadEventStream(mpsc::UnboundedSender<Result<ThreadEvent>>);
1719
1720impl ThreadEventStream {
1721    fn send_user_message(&self, message: &UserMessage) {
1722        self.0
1723            .unbounded_send(Ok(ThreadEvent::UserMessage(message.clone())))
1724            .ok();
1725    }
1726
1727    fn send_text(&self, text: &str) {
1728        self.0
1729            .unbounded_send(Ok(ThreadEvent::AgentText(text.to_string())))
1730            .ok();
1731    }
1732
1733    fn send_thinking(&self, text: &str) {
1734        self.0
1735            .unbounded_send(Ok(ThreadEvent::AgentThinking(text.to_string())))
1736            .ok();
1737    }
1738
1739    fn send_tool_call(
1740        &self,
1741        id: &LanguageModelToolUseId,
1742        title: SharedString,
1743        kind: acp::ToolKind,
1744        input: serde_json::Value,
1745    ) {
1746        self.0
1747            .unbounded_send(Ok(ThreadEvent::ToolCall(Self::initial_tool_call(
1748                id,
1749                title.to_string(),
1750                kind,
1751                input,
1752            ))))
1753            .ok();
1754    }
1755
1756    fn initial_tool_call(
1757        id: &LanguageModelToolUseId,
1758        title: String,
1759        kind: acp::ToolKind,
1760        input: serde_json::Value,
1761    ) -> acp::ToolCall {
1762        acp::ToolCall {
1763            id: acp::ToolCallId(id.to_string().into()),
1764            title,
1765            kind,
1766            status: acp::ToolCallStatus::Pending,
1767            content: vec![],
1768            locations: vec![],
1769            raw_input: Some(input),
1770            raw_output: None,
1771        }
1772    }
1773
1774    fn update_tool_call_fields(
1775        &self,
1776        tool_use_id: &LanguageModelToolUseId,
1777        fields: acp::ToolCallUpdateFields,
1778    ) {
1779        self.0
1780            .unbounded_send(Ok(ThreadEvent::ToolCallUpdate(
1781                acp::ToolCallUpdate {
1782                    id: acp::ToolCallId(tool_use_id.to_string().into()),
1783                    fields,
1784                }
1785                .into(),
1786            )))
1787            .ok();
1788    }
1789
1790    fn send_stop(&self, reason: StopReason) {
1791        match reason {
1792            StopReason::EndTurn => {
1793                self.0
1794                    .unbounded_send(Ok(ThreadEvent::Stop(acp::StopReason::EndTurn)))
1795                    .ok();
1796            }
1797            StopReason::MaxTokens => {
1798                self.0
1799                    .unbounded_send(Ok(ThreadEvent::Stop(acp::StopReason::MaxTokens)))
1800                    .ok();
1801            }
1802            StopReason::Refusal => {
1803                self.0
1804                    .unbounded_send(Ok(ThreadEvent::Stop(acp::StopReason::Refusal)))
1805                    .ok();
1806            }
1807            StopReason::ToolUse => {}
1808        }
1809    }
1810
1811    fn send_canceled(&self) {
1812        self.0
1813            .unbounded_send(Ok(ThreadEvent::Stop(acp::StopReason::Canceled)))
1814            .ok();
1815    }
1816
1817    fn send_error(&self, error: impl Into<anyhow::Error>) {
1818        self.0.unbounded_send(Err(error.into())).ok();
1819    }
1820}
1821
1822#[derive(Clone)]
1823pub struct ToolCallEventStream {
1824    tool_use_id: LanguageModelToolUseId,
1825    stream: ThreadEventStream,
1826    fs: Option<Arc<dyn Fs>>,
1827}
1828
1829impl ToolCallEventStream {
1830    #[cfg(test)]
1831    pub fn test() -> (Self, ToolCallEventStreamReceiver) {
1832        let (events_tx, events_rx) = mpsc::unbounded::<Result<ThreadEvent>>();
1833
1834        let stream = ToolCallEventStream::new("test_id".into(), ThreadEventStream(events_tx), None);
1835
1836        (stream, ToolCallEventStreamReceiver(events_rx))
1837    }
1838
1839    fn new(
1840        tool_use_id: LanguageModelToolUseId,
1841        stream: ThreadEventStream,
1842        fs: Option<Arc<dyn Fs>>,
1843    ) -> Self {
1844        Self {
1845            tool_use_id,
1846            stream,
1847            fs,
1848        }
1849    }
1850
1851    pub fn update_fields(&self, fields: acp::ToolCallUpdateFields) {
1852        self.stream
1853            .update_tool_call_fields(&self.tool_use_id, fields);
1854    }
1855
1856    pub fn update_diff(&self, diff: Entity<acp_thread::Diff>) {
1857        self.stream
1858            .0
1859            .unbounded_send(Ok(ThreadEvent::ToolCallUpdate(
1860                acp_thread::ToolCallUpdateDiff {
1861                    id: acp::ToolCallId(self.tool_use_id.to_string().into()),
1862                    diff,
1863                }
1864                .into(),
1865            )))
1866            .ok();
1867    }
1868
1869    pub fn update_terminal(&self, terminal: Entity<acp_thread::Terminal>) {
1870        self.stream
1871            .0
1872            .unbounded_send(Ok(ThreadEvent::ToolCallUpdate(
1873                acp_thread::ToolCallUpdateTerminal {
1874                    id: acp::ToolCallId(self.tool_use_id.to_string().into()),
1875                    terminal,
1876                }
1877                .into(),
1878            )))
1879            .ok();
1880    }
1881
1882    pub fn authorize(&self, title: impl Into<String>, cx: &mut App) -> Task<Result<()>> {
1883        if agent_settings::AgentSettings::get_global(cx).always_allow_tool_actions {
1884            return Task::ready(Ok(()));
1885        }
1886
1887        let (response_tx, response_rx) = oneshot::channel();
1888        self.stream
1889            .0
1890            .unbounded_send(Ok(ThreadEvent::ToolCallAuthorization(
1891                ToolCallAuthorization {
1892                    tool_call: acp::ToolCallUpdate {
1893                        id: acp::ToolCallId(self.tool_use_id.to_string().into()),
1894                        fields: acp::ToolCallUpdateFields {
1895                            title: Some(title.into()),
1896                            ..Default::default()
1897                        },
1898                    },
1899                    options: vec![
1900                        acp::PermissionOption {
1901                            id: acp::PermissionOptionId("always_allow".into()),
1902                            name: "Always Allow".into(),
1903                            kind: acp::PermissionOptionKind::AllowAlways,
1904                        },
1905                        acp::PermissionOption {
1906                            id: acp::PermissionOptionId("allow".into()),
1907                            name: "Allow".into(),
1908                            kind: acp::PermissionOptionKind::AllowOnce,
1909                        },
1910                        acp::PermissionOption {
1911                            id: acp::PermissionOptionId("deny".into()),
1912                            name: "Deny".into(),
1913                            kind: acp::PermissionOptionKind::RejectOnce,
1914                        },
1915                    ],
1916                    response: response_tx,
1917                },
1918            )))
1919            .ok();
1920        let fs = self.fs.clone();
1921        cx.spawn(async move |cx| match response_rx.await?.0.as_ref() {
1922            "always_allow" => {
1923                if let Some(fs) = fs.clone() {
1924                    cx.update(|cx| {
1925                        update_settings_file::<AgentSettings>(fs, cx, |settings, _| {
1926                            settings.set_always_allow_tool_actions(true);
1927                        });
1928                    })?;
1929                }
1930
1931                Ok(())
1932            }
1933            "allow" => Ok(()),
1934            _ => Err(anyhow!("Permission to run tool denied by user")),
1935        })
1936    }
1937}
1938
1939#[cfg(test)]
1940pub struct ToolCallEventStreamReceiver(mpsc::UnboundedReceiver<Result<ThreadEvent>>);
1941
1942#[cfg(test)]
1943impl ToolCallEventStreamReceiver {
1944    pub async fn expect_authorization(&mut self) -> ToolCallAuthorization {
1945        let event = self.0.next().await;
1946        if let Some(Ok(ThreadEvent::ToolCallAuthorization(auth))) = event {
1947            auth
1948        } else {
1949            panic!("Expected ToolCallAuthorization but got: {:?}", event);
1950        }
1951    }
1952
1953    pub async fn expect_terminal(&mut self) -> Entity<acp_thread::Terminal> {
1954        let event = self.0.next().await;
1955        if let Some(Ok(ThreadEvent::ToolCallUpdate(acp_thread::ToolCallUpdate::UpdateTerminal(
1956            update,
1957        )))) = event
1958        {
1959            update.terminal
1960        } else {
1961            panic!("Expected terminal but got: {:?}", event);
1962        }
1963    }
1964}
1965
1966#[cfg(test)]
1967impl std::ops::Deref for ToolCallEventStreamReceiver {
1968    type Target = mpsc::UnboundedReceiver<Result<ThreadEvent>>;
1969
1970    fn deref(&self) -> &Self::Target {
1971        &self.0
1972    }
1973}
1974
1975#[cfg(test)]
1976impl std::ops::DerefMut for ToolCallEventStreamReceiver {
1977    fn deref_mut(&mut self) -> &mut Self::Target {
1978        &mut self.0
1979    }
1980}
1981
1982impl From<&str> for UserMessageContent {
1983    fn from(text: &str) -> Self {
1984        Self::Text(text.into())
1985    }
1986}
1987
1988impl From<acp::ContentBlock> for UserMessageContent {
1989    fn from(value: acp::ContentBlock) -> Self {
1990        match value {
1991            acp::ContentBlock::Text(text_content) => Self::Text(text_content.text),
1992            acp::ContentBlock::Image(image_content) => Self::Image(convert_image(image_content)),
1993            acp::ContentBlock::Audio(_) => {
1994                // TODO
1995                Self::Text("[audio]".to_string())
1996            }
1997            acp::ContentBlock::ResourceLink(resource_link) => {
1998                match MentionUri::parse(&resource_link.uri) {
1999                    Ok(uri) => Self::Mention {
2000                        uri,
2001                        content: String::new(),
2002                    },
2003                    Err(err) => {
2004                        log::error!("Failed to parse mention link: {}", err);
2005                        Self::Text(format!("[{}]({})", resource_link.name, resource_link.uri))
2006                    }
2007                }
2008            }
2009            acp::ContentBlock::Resource(resource) => match resource.resource {
2010                acp::EmbeddedResourceResource::TextResourceContents(resource) => {
2011                    match MentionUri::parse(&resource.uri) {
2012                        Ok(uri) => Self::Mention {
2013                            uri,
2014                            content: resource.text,
2015                        },
2016                        Err(err) => {
2017                            log::error!("Failed to parse mention link: {}", err);
2018                            Self::Text(
2019                                MarkdownCodeBlock {
2020                                    tag: &resource.uri,
2021                                    text: &resource.text,
2022                                }
2023                                .to_string(),
2024                            )
2025                        }
2026                    }
2027                }
2028                acp::EmbeddedResourceResource::BlobResourceContents(_) => {
2029                    // TODO
2030                    Self::Text("[blob]".to_string())
2031                }
2032            },
2033        }
2034    }
2035}
2036
2037impl From<UserMessageContent> for acp::ContentBlock {
2038    fn from(content: UserMessageContent) -> Self {
2039        match content {
2040            UserMessageContent::Text(text) => acp::ContentBlock::Text(acp::TextContent {
2041                text,
2042                annotations: None,
2043            }),
2044            UserMessageContent::Image(image) => acp::ContentBlock::Image(acp::ImageContent {
2045                data: image.source.to_string(),
2046                mime_type: "image/png".to_string(),
2047                annotations: None,
2048                uri: None,
2049            }),
2050            UserMessageContent::Mention { .. } => {
2051                todo!()
2052            }
2053        }
2054    }
2055}
2056
2057fn convert_image(image_content: acp::ImageContent) -> LanguageModelImage {
2058    LanguageModelImage {
2059        source: image_content.data.into(),
2060        // TODO: make this optional?
2061        size: gpui::Size::new(0.into(), 0.into()),
2062    }
2063}