1mod connection;
   2mod diff;
   3mod mention;
   4mod terminal;
   5
   6pub use connection::*;
   7pub use diff::*;
   8pub use mention::*;
   9pub use terminal::*;
  10
  11use action_log::ActionLog;
  12use agent_client_protocol as acp;
  13use anyhow::{Context as _, Result, anyhow};
  14use editor::Bias;
  15use futures::{FutureExt, channel::oneshot, future::BoxFuture};
  16use gpui::{AppContext, AsyncApp, Context, Entity, EventEmitter, SharedString, Task, WeakEntity};
  17use itertools::Itertools;
  18use language::{Anchor, Buffer, BufferSnapshot, LanguageRegistry, Point, ToPoint, text_diff};
  19use markdown::Markdown;
  20use project::{AgentLocation, Project, git_store::GitStoreCheckpoint};
  21use std::collections::HashMap;
  22use std::error::Error;
  23use std::fmt::{Formatter, Write};
  24use std::ops::Range;
  25use std::process::ExitStatus;
  26use std::rc::Rc;
  27use std::{fmt::Display, mem, path::PathBuf, sync::Arc};
  28use ui::App;
  29use util::ResultExt;
  30
  31#[derive(Debug)]
  32pub struct UserMessage {
  33    pub id: Option<UserMessageId>,
  34    pub content: ContentBlock,
  35    pub chunks: Vec<acp::ContentBlock>,
  36    pub checkpoint: Option<Checkpoint>,
  37}
  38
  39#[derive(Debug)]
  40pub struct Checkpoint {
  41    git_checkpoint: GitStoreCheckpoint,
  42    pub show: bool,
  43}
  44
  45impl UserMessage {
  46    fn to_markdown(&self, cx: &App) -> String {
  47        let mut markdown = String::new();
  48        if self
  49            .checkpoint
  50            .as_ref()
  51            .map_or(false, |checkpoint| checkpoint.show)
  52        {
  53            writeln!(markdown, "## User (checkpoint)").unwrap();
  54        } else {
  55            writeln!(markdown, "## User").unwrap();
  56        }
  57        writeln!(markdown).unwrap();
  58        writeln!(markdown, "{}", self.content.to_markdown(cx)).unwrap();
  59        writeln!(markdown).unwrap();
  60        markdown
  61    }
  62}
  63
  64#[derive(Debug, PartialEq)]
  65pub struct AssistantMessage {
  66    pub chunks: Vec<AssistantMessageChunk>,
  67}
  68
  69impl AssistantMessage {
  70    pub fn to_markdown(&self, cx: &App) -> String {
  71        format!(
  72            "## Assistant\n\n{}\n\n",
  73            self.chunks
  74                .iter()
  75                .map(|chunk| chunk.to_markdown(cx))
  76                .join("\n\n")
  77        )
  78    }
  79}
  80
  81#[derive(Debug, PartialEq)]
  82pub enum AssistantMessageChunk {
  83    Message { block: ContentBlock },
  84    Thought { block: ContentBlock },
  85}
  86
  87impl AssistantMessageChunk {
  88    pub fn from_str(chunk: &str, language_registry: &Arc<LanguageRegistry>, cx: &mut App) -> Self {
  89        Self::Message {
  90            block: ContentBlock::new(chunk.into(), language_registry, cx),
  91        }
  92    }
  93
  94    fn to_markdown(&self, cx: &App) -> String {
  95        match self {
  96            Self::Message { block } => block.to_markdown(cx).to_string(),
  97            Self::Thought { block } => {
  98                format!("<thinking>\n{}\n</thinking>", block.to_markdown(cx))
  99            }
 100        }
 101    }
 102}
 103
 104#[derive(Debug)]
 105pub enum AgentThreadEntry {
 106    UserMessage(UserMessage),
 107    AssistantMessage(AssistantMessage),
 108    ToolCall(ToolCall),
 109}
 110
 111impl AgentThreadEntry {
 112    pub fn to_markdown(&self, cx: &App) -> String {
 113        match self {
 114            Self::UserMessage(message) => message.to_markdown(cx),
 115            Self::AssistantMessage(message) => message.to_markdown(cx),
 116            Self::ToolCall(tool_call) => tool_call.to_markdown(cx),
 117        }
 118    }
 119
 120    pub fn user_message(&self) -> Option<&UserMessage> {
 121        if let AgentThreadEntry::UserMessage(message) = self {
 122            Some(message)
 123        } else {
 124            None
 125        }
 126    }
 127
 128    pub fn diffs(&self) -> impl Iterator<Item = &Entity<Diff>> {
 129        if let AgentThreadEntry::ToolCall(call) = self {
 130            itertools::Either::Left(call.diffs())
 131        } else {
 132            itertools::Either::Right(std::iter::empty())
 133        }
 134    }
 135
 136    pub fn terminals(&self) -> impl Iterator<Item = &Entity<Terminal>> {
 137        if let AgentThreadEntry::ToolCall(call) = self {
 138            itertools::Either::Left(call.terminals())
 139        } else {
 140            itertools::Either::Right(std::iter::empty())
 141        }
 142    }
 143
 144    pub fn location(&self, ix: usize) -> Option<(acp::ToolCallLocation, AgentLocation)> {
 145        if let AgentThreadEntry::ToolCall(ToolCall {
 146            locations,
 147            resolved_locations,
 148            ..
 149        }) = self
 150        {
 151            Some((
 152                locations.get(ix)?.clone(),
 153                resolved_locations.get(ix)?.clone()?,
 154            ))
 155        } else {
 156            None
 157        }
 158    }
 159}
 160
 161#[derive(Debug)]
 162pub struct ToolCall {
 163    pub id: acp::ToolCallId,
 164    pub label: Entity<Markdown>,
 165    pub kind: acp::ToolKind,
 166    pub content: Vec<ToolCallContent>,
 167    pub status: ToolCallStatus,
 168    pub locations: Vec<acp::ToolCallLocation>,
 169    pub resolved_locations: Vec<Option<AgentLocation>>,
 170    pub raw_input: Option<serde_json::Value>,
 171    pub raw_output: Option<serde_json::Value>,
 172}
 173
 174impl ToolCall {
 175    fn from_acp(
 176        tool_call: acp::ToolCall,
 177        status: ToolCallStatus,
 178        language_registry: Arc<LanguageRegistry>,
 179        cx: &mut App,
 180    ) -> Self {
 181        Self {
 182            id: tool_call.id,
 183            label: cx.new(|cx| {
 184                Markdown::new(
 185                    tool_call.title.into(),
 186                    Some(language_registry.clone()),
 187                    None,
 188                    cx,
 189                )
 190            }),
 191            kind: tool_call.kind,
 192            content: tool_call
 193                .content
 194                .into_iter()
 195                .map(|content| ToolCallContent::from_acp(content, language_registry.clone(), cx))
 196                .collect(),
 197            locations: tool_call.locations,
 198            resolved_locations: Vec::default(),
 199            status,
 200            raw_input: tool_call.raw_input,
 201            raw_output: tool_call.raw_output,
 202        }
 203    }
 204
 205    fn update_fields(
 206        &mut self,
 207        fields: acp::ToolCallUpdateFields,
 208        language_registry: Arc<LanguageRegistry>,
 209        cx: &mut App,
 210    ) {
 211        let acp::ToolCallUpdateFields {
 212            kind,
 213            status,
 214            title,
 215            content,
 216            locations,
 217            raw_input,
 218            raw_output,
 219        } = fields;
 220
 221        if let Some(kind) = kind {
 222            self.kind = kind;
 223        }
 224
 225        if let Some(status) = status {
 226            self.status = status.into();
 227        }
 228
 229        if let Some(title) = title {
 230            self.label.update(cx, |label, cx| {
 231                label.replace(title, cx);
 232            });
 233        }
 234
 235        if let Some(content) = content {
 236            self.content = content
 237                .into_iter()
 238                .map(|chunk| ToolCallContent::from_acp(chunk, language_registry.clone(), cx))
 239                .collect();
 240        }
 241
 242        if let Some(locations) = locations {
 243            self.locations = locations;
 244        }
 245
 246        if let Some(raw_input) = raw_input {
 247            self.raw_input = Some(raw_input);
 248        }
 249
 250        if let Some(raw_output) = raw_output {
 251            if self.content.is_empty() {
 252                if let Some(markdown) = markdown_for_raw_output(&raw_output, &language_registry, cx)
 253                {
 254                    self.content
 255                        .push(ToolCallContent::ContentBlock(ContentBlock::Markdown {
 256                            markdown,
 257                        }));
 258                }
 259            }
 260            self.raw_output = Some(raw_output);
 261        }
 262    }
 263
 264    pub fn diffs(&self) -> impl Iterator<Item = &Entity<Diff>> {
 265        self.content.iter().filter_map(|content| match content {
 266            ToolCallContent::Diff(diff) => Some(diff),
 267            ToolCallContent::ContentBlock(_) => None,
 268            ToolCallContent::Terminal(_) => None,
 269        })
 270    }
 271
 272    pub fn terminals(&self) -> impl Iterator<Item = &Entity<Terminal>> {
 273        self.content.iter().filter_map(|content| match content {
 274            ToolCallContent::Terminal(terminal) => Some(terminal),
 275            ToolCallContent::ContentBlock(_) => None,
 276            ToolCallContent::Diff(_) => None,
 277        })
 278    }
 279
 280    fn to_markdown(&self, cx: &App) -> String {
 281        let mut markdown = format!(
 282            "**Tool Call: {}**\nStatus: {}\n\n",
 283            self.label.read(cx).source(),
 284            self.status
 285        );
 286        for content in &self.content {
 287            markdown.push_str(content.to_markdown(cx).as_str());
 288            markdown.push_str("\n\n");
 289        }
 290        markdown
 291    }
 292
 293    async fn resolve_location(
 294        location: acp::ToolCallLocation,
 295        project: WeakEntity<Project>,
 296        cx: &mut AsyncApp,
 297    ) -> Option<AgentLocation> {
 298        let buffer = project
 299            .update(cx, |project, cx| {
 300                if let Some(path) = project.project_path_for_absolute_path(&location.path, cx) {
 301                    Some(project.open_buffer(path, cx))
 302                } else {
 303                    None
 304                }
 305            })
 306            .ok()??;
 307        let buffer = buffer.await.log_err()?;
 308        let position = buffer
 309            .update(cx, |buffer, _| {
 310                if let Some(row) = location.line {
 311                    let snapshot = buffer.snapshot();
 312                    let column = snapshot.indent_size_for_line(row).len;
 313                    let point = snapshot.clip_point(Point::new(row, column), Bias::Left);
 314                    snapshot.anchor_before(point)
 315                } else {
 316                    Anchor::MIN
 317                }
 318            })
 319            .ok()?;
 320
 321        Some(AgentLocation {
 322            buffer: buffer.downgrade(),
 323            position,
 324        })
 325    }
 326
 327    fn resolve_locations(
 328        &self,
 329        project: Entity<Project>,
 330        cx: &mut App,
 331    ) -> Task<Vec<Option<AgentLocation>>> {
 332        let locations = self.locations.clone();
 333        project.update(cx, |_, cx| {
 334            cx.spawn(async move |project, cx| {
 335                let mut new_locations = Vec::new();
 336                for location in locations {
 337                    new_locations.push(Self::resolve_location(location, project.clone(), cx).await);
 338                }
 339                new_locations
 340            })
 341        })
 342    }
 343}
 344
 345#[derive(Debug)]
 346pub enum ToolCallStatus {
 347    /// The tool call hasn't started running yet, but we start showing it to
 348    /// the user.
 349    Pending,
 350    /// The tool call is waiting for confirmation from the user.
 351    WaitingForConfirmation {
 352        options: Vec<acp::PermissionOption>,
 353        respond_tx: oneshot::Sender<acp::PermissionOptionId>,
 354    },
 355    /// The tool call is currently running.
 356    InProgress,
 357    /// The tool call completed successfully.
 358    Completed,
 359    /// The tool call failed.
 360    Failed,
 361    /// The user rejected the tool call.
 362    Rejected,
 363    /// The user canceled generation so the tool call was canceled.
 364    Canceled,
 365}
 366
 367impl From<acp::ToolCallStatus> for ToolCallStatus {
 368    fn from(status: acp::ToolCallStatus) -> Self {
 369        match status {
 370            acp::ToolCallStatus::Pending => Self::Pending,
 371            acp::ToolCallStatus::InProgress => Self::InProgress,
 372            acp::ToolCallStatus::Completed => Self::Completed,
 373            acp::ToolCallStatus::Failed => Self::Failed,
 374        }
 375    }
 376}
 377
 378impl Display for ToolCallStatus {
 379    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
 380        write!(
 381            f,
 382            "{}",
 383            match self {
 384                ToolCallStatus::Pending => "Pending",
 385                ToolCallStatus::WaitingForConfirmation { .. } => "Waiting for confirmation",
 386                ToolCallStatus::InProgress => "In Progress",
 387                ToolCallStatus::Completed => "Completed",
 388                ToolCallStatus::Failed => "Failed",
 389                ToolCallStatus::Rejected => "Rejected",
 390                ToolCallStatus::Canceled => "Canceled",
 391            }
 392        )
 393    }
 394}
 395
 396#[derive(Debug, PartialEq, Clone)]
 397pub enum ContentBlock {
 398    Empty,
 399    Markdown { markdown: Entity<Markdown> },
 400    ResourceLink { resource_link: acp::ResourceLink },
 401}
 402
 403impl ContentBlock {
 404    pub fn new(
 405        block: acp::ContentBlock,
 406        language_registry: &Arc<LanguageRegistry>,
 407        cx: &mut App,
 408    ) -> Self {
 409        let mut this = Self::Empty;
 410        this.append(block, language_registry, cx);
 411        this
 412    }
 413
 414    pub fn new_combined(
 415        blocks: impl IntoIterator<Item = acp::ContentBlock>,
 416        language_registry: Arc<LanguageRegistry>,
 417        cx: &mut App,
 418    ) -> Self {
 419        let mut this = Self::Empty;
 420        for block in blocks {
 421            this.append(block, &language_registry, cx);
 422        }
 423        this
 424    }
 425
 426    pub fn append(
 427        &mut self,
 428        block: acp::ContentBlock,
 429        language_registry: &Arc<LanguageRegistry>,
 430        cx: &mut App,
 431    ) {
 432        if matches!(self, ContentBlock::Empty) {
 433            if let acp::ContentBlock::ResourceLink(resource_link) = block {
 434                *self = ContentBlock::ResourceLink { resource_link };
 435                return;
 436            }
 437        }
 438
 439        let new_content = self.block_string_contents(block);
 440
 441        match self {
 442            ContentBlock::Empty => {
 443                *self = Self::create_markdown_block(new_content, language_registry, cx);
 444            }
 445            ContentBlock::Markdown { markdown } => {
 446                markdown.update(cx, |markdown, cx| markdown.append(&new_content, cx));
 447            }
 448            ContentBlock::ResourceLink { resource_link } => {
 449                let existing_content = Self::resource_link_md(&resource_link.uri);
 450                let combined = format!("{}\n{}", existing_content, new_content);
 451
 452                *self = Self::create_markdown_block(combined, language_registry, cx);
 453            }
 454        }
 455    }
 456
 457    fn create_markdown_block(
 458        content: String,
 459        language_registry: &Arc<LanguageRegistry>,
 460        cx: &mut App,
 461    ) -> ContentBlock {
 462        ContentBlock::Markdown {
 463            markdown: cx
 464                .new(|cx| Markdown::new(content.into(), Some(language_registry.clone()), None, cx)),
 465        }
 466    }
 467
 468    fn block_string_contents(&self, block: acp::ContentBlock) -> String {
 469        match block {
 470            acp::ContentBlock::Text(text_content) => text_content.text.clone(),
 471            acp::ContentBlock::ResourceLink(resource_link) => {
 472                Self::resource_link_md(&resource_link.uri)
 473            }
 474            acp::ContentBlock::Resource(acp::EmbeddedResource {
 475                resource:
 476                    acp::EmbeddedResourceResource::TextResourceContents(acp::TextResourceContents {
 477                        uri,
 478                        ..
 479                    }),
 480                ..
 481            }) => Self::resource_link_md(&uri),
 482            acp::ContentBlock::Image(image) => Self::image_md(&image),
 483            acp::ContentBlock::Audio(_) | acp::ContentBlock::Resource(_) => String::new(),
 484        }
 485    }
 486
 487    fn resource_link_md(uri: &str) -> String {
 488        if let Some(uri) = MentionUri::parse(&uri).log_err() {
 489            uri.as_link().to_string()
 490        } else {
 491            uri.to_string()
 492        }
 493    }
 494
 495    fn image_md(_image: &acp::ImageContent) -> String {
 496        "`Image`".into()
 497    }
 498
 499    fn to_markdown<'a>(&'a self, cx: &'a App) -> &'a str {
 500        match self {
 501            ContentBlock::Empty => "",
 502            ContentBlock::Markdown { markdown } => markdown.read(cx).source(),
 503            ContentBlock::ResourceLink { resource_link } => &resource_link.uri,
 504        }
 505    }
 506
 507    pub fn markdown(&self) -> Option<&Entity<Markdown>> {
 508        match self {
 509            ContentBlock::Empty => None,
 510            ContentBlock::Markdown { markdown } => Some(markdown),
 511            ContentBlock::ResourceLink { .. } => None,
 512        }
 513    }
 514
 515    pub fn resource_link(&self) -> Option<&acp::ResourceLink> {
 516        match self {
 517            ContentBlock::ResourceLink { resource_link } => Some(resource_link),
 518            _ => None,
 519        }
 520    }
 521}
 522
 523#[derive(Debug)]
 524pub enum ToolCallContent {
 525    ContentBlock(ContentBlock),
 526    Diff(Entity<Diff>),
 527    Terminal(Entity<Terminal>),
 528}
 529
 530impl ToolCallContent {
 531    pub fn from_acp(
 532        content: acp::ToolCallContent,
 533        language_registry: Arc<LanguageRegistry>,
 534        cx: &mut App,
 535    ) -> Self {
 536        match content {
 537            acp::ToolCallContent::Content { content } => {
 538                Self::ContentBlock(ContentBlock::new(content, &language_registry, cx))
 539            }
 540            acp::ToolCallContent::Diff { diff } => {
 541                Self::Diff(cx.new(|cx| Diff::from_acp(diff, language_registry, cx)))
 542            }
 543        }
 544    }
 545
 546    pub fn to_markdown(&self, cx: &App) -> String {
 547        match self {
 548            Self::ContentBlock(content) => content.to_markdown(cx).to_string(),
 549            Self::Diff(diff) => diff.read(cx).to_markdown(cx),
 550            Self::Terminal(terminal) => terminal.read(cx).to_markdown(cx),
 551        }
 552    }
 553}
 554
 555#[derive(Debug, PartialEq)]
 556pub enum ToolCallUpdate {
 557    UpdateFields(acp::ToolCallUpdate),
 558    UpdateDiff(ToolCallUpdateDiff),
 559    UpdateTerminal(ToolCallUpdateTerminal),
 560}
 561
 562impl ToolCallUpdate {
 563    fn id(&self) -> &acp::ToolCallId {
 564        match self {
 565            Self::UpdateFields(update) => &update.id,
 566            Self::UpdateDiff(diff) => &diff.id,
 567            Self::UpdateTerminal(terminal) => &terminal.id,
 568        }
 569    }
 570}
 571
 572impl From<acp::ToolCallUpdate> for ToolCallUpdate {
 573    fn from(update: acp::ToolCallUpdate) -> Self {
 574        Self::UpdateFields(update)
 575    }
 576}
 577
 578impl From<ToolCallUpdateDiff> for ToolCallUpdate {
 579    fn from(diff: ToolCallUpdateDiff) -> Self {
 580        Self::UpdateDiff(diff)
 581    }
 582}
 583
 584#[derive(Debug, PartialEq)]
 585pub struct ToolCallUpdateDiff {
 586    pub id: acp::ToolCallId,
 587    pub diff: Entity<Diff>,
 588}
 589
 590impl From<ToolCallUpdateTerminal> for ToolCallUpdate {
 591    fn from(terminal: ToolCallUpdateTerminal) -> Self {
 592        Self::UpdateTerminal(terminal)
 593    }
 594}
 595
 596#[derive(Debug, PartialEq)]
 597pub struct ToolCallUpdateTerminal {
 598    pub id: acp::ToolCallId,
 599    pub terminal: Entity<Terminal>,
 600}
 601
 602#[derive(Debug, Default)]
 603pub struct Plan {
 604    pub entries: Vec<PlanEntry>,
 605}
 606
 607#[derive(Debug)]
 608pub struct PlanStats<'a> {
 609    pub in_progress_entry: Option<&'a PlanEntry>,
 610    pub pending: u32,
 611    pub completed: u32,
 612}
 613
 614impl Plan {
 615    pub fn is_empty(&self) -> bool {
 616        self.entries.is_empty()
 617    }
 618
 619    pub fn stats(&self) -> PlanStats<'_> {
 620        let mut stats = PlanStats {
 621            in_progress_entry: None,
 622            pending: 0,
 623            completed: 0,
 624        };
 625
 626        for entry in &self.entries {
 627            match &entry.status {
 628                acp::PlanEntryStatus::Pending => {
 629                    stats.pending += 1;
 630                }
 631                acp::PlanEntryStatus::InProgress => {
 632                    stats.in_progress_entry = stats.in_progress_entry.or(Some(entry));
 633                }
 634                acp::PlanEntryStatus::Completed => {
 635                    stats.completed += 1;
 636                }
 637            }
 638        }
 639
 640        stats
 641    }
 642}
 643
 644#[derive(Debug)]
 645pub struct PlanEntry {
 646    pub content: Entity<Markdown>,
 647    pub priority: acp::PlanEntryPriority,
 648    pub status: acp::PlanEntryStatus,
 649}
 650
 651impl PlanEntry {
 652    pub fn from_acp(entry: acp::PlanEntry, cx: &mut App) -> Self {
 653        Self {
 654            content: cx.new(|cx| Markdown::new(entry.content.into(), None, None, cx)),
 655            priority: entry.priority,
 656            status: entry.status,
 657        }
 658    }
 659}
 660
 661pub struct AcpThread {
 662    title: SharedString,
 663    entries: Vec<AgentThreadEntry>,
 664    plan: Plan,
 665    project: Entity<Project>,
 666    action_log: Entity<ActionLog>,
 667    shared_buffers: HashMap<Entity<Buffer>, BufferSnapshot>,
 668    send_task: Option<Task<()>>,
 669    connection: Rc<dyn AgentConnection>,
 670    session_id: acp::SessionId,
 671}
 672
 673pub enum AcpThreadEvent {
 674    NewEntry,
 675    EntryUpdated(usize),
 676    EntriesRemoved(Range<usize>),
 677    ToolAuthorizationRequired,
 678    Stopped,
 679    Error,
 680    ServerExited(ExitStatus),
 681}
 682
 683impl EventEmitter<AcpThreadEvent> for AcpThread {}
 684
 685#[derive(PartialEq, Eq)]
 686pub enum ThreadStatus {
 687    Idle,
 688    WaitingForToolConfirmation,
 689    Generating,
 690}
 691
 692#[derive(Debug, Clone)]
 693pub enum LoadError {
 694    Unsupported {
 695        error_message: SharedString,
 696        upgrade_message: SharedString,
 697        upgrade_command: String,
 698    },
 699    Exited(i32),
 700    Other(SharedString),
 701}
 702
 703impl Display for LoadError {
 704    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
 705        match self {
 706            LoadError::Unsupported { error_message, .. } => write!(f, "{}", error_message),
 707            LoadError::Exited(status) => write!(f, "Server exited with status {}", status),
 708            LoadError::Other(msg) => write!(f, "{}", msg),
 709        }
 710    }
 711}
 712
 713impl Error for LoadError {}
 714
 715impl AcpThread {
 716    pub fn new(
 717        title: impl Into<SharedString>,
 718        connection: Rc<dyn AgentConnection>,
 719        project: Entity<Project>,
 720        session_id: acp::SessionId,
 721        cx: &mut Context<Self>,
 722    ) -> Self {
 723        let action_log = cx.new(|_| ActionLog::new(project.clone()));
 724
 725        Self {
 726            action_log,
 727            shared_buffers: Default::default(),
 728            entries: Default::default(),
 729            plan: Default::default(),
 730            title: title.into(),
 731            project,
 732            send_task: None,
 733            connection,
 734            session_id,
 735        }
 736    }
 737
 738    pub fn connection(&self) -> &Rc<dyn AgentConnection> {
 739        &self.connection
 740    }
 741
 742    pub fn action_log(&self) -> &Entity<ActionLog> {
 743        &self.action_log
 744    }
 745
 746    pub fn project(&self) -> &Entity<Project> {
 747        &self.project
 748    }
 749
 750    pub fn title(&self) -> SharedString {
 751        self.title.clone()
 752    }
 753
 754    pub fn entries(&self) -> &[AgentThreadEntry] {
 755        &self.entries
 756    }
 757
 758    pub fn session_id(&self) -> &acp::SessionId {
 759        &self.session_id
 760    }
 761
 762    pub fn status(&self) -> ThreadStatus {
 763        if self.send_task.is_some() {
 764            if self.waiting_for_tool_confirmation() {
 765                ThreadStatus::WaitingForToolConfirmation
 766            } else {
 767                ThreadStatus::Generating
 768            }
 769        } else {
 770            ThreadStatus::Idle
 771        }
 772    }
 773
 774    pub fn has_pending_edit_tool_calls(&self) -> bool {
 775        for entry in self.entries.iter().rev() {
 776            match entry {
 777                AgentThreadEntry::UserMessage(_) => return false,
 778                AgentThreadEntry::ToolCall(
 779                    call @ ToolCall {
 780                        status: ToolCallStatus::InProgress | ToolCallStatus::Pending,
 781                        ..
 782                    },
 783                ) if call.diffs().next().is_some() => {
 784                    return true;
 785                }
 786                AgentThreadEntry::ToolCall(_) | AgentThreadEntry::AssistantMessage(_) => {}
 787            }
 788        }
 789
 790        false
 791    }
 792
 793    pub fn used_tools_since_last_user_message(&self) -> bool {
 794        for entry in self.entries.iter().rev() {
 795            match entry {
 796                AgentThreadEntry::UserMessage(..) => return false,
 797                AgentThreadEntry::AssistantMessage(..) => continue,
 798                AgentThreadEntry::ToolCall(..) => return true,
 799            }
 800        }
 801
 802        false
 803    }
 804
 805    pub fn handle_session_update(
 806        &mut self,
 807        update: acp::SessionUpdate,
 808        cx: &mut Context<Self>,
 809    ) -> Result<(), acp::Error> {
 810        match update {
 811            acp::SessionUpdate::UserMessageChunk { content } => {
 812                self.push_user_content_block(None, content, cx);
 813            }
 814            acp::SessionUpdate::AgentMessageChunk { content } => {
 815                self.push_assistant_content_block(content, false, cx);
 816            }
 817            acp::SessionUpdate::AgentThoughtChunk { content } => {
 818                self.push_assistant_content_block(content, true, cx);
 819            }
 820            acp::SessionUpdate::ToolCall(tool_call) => {
 821                self.upsert_tool_call(tool_call, cx)?;
 822            }
 823            acp::SessionUpdate::ToolCallUpdate(tool_call_update) => {
 824                self.update_tool_call(tool_call_update, cx)?;
 825            }
 826            acp::SessionUpdate::Plan(plan) => {
 827                self.update_plan(plan, cx);
 828            }
 829        }
 830        Ok(())
 831    }
 832
 833    pub fn push_user_content_block(
 834        &mut self,
 835        message_id: Option<UserMessageId>,
 836        chunk: acp::ContentBlock,
 837        cx: &mut Context<Self>,
 838    ) {
 839        let language_registry = self.project.read(cx).languages().clone();
 840        let entries_len = self.entries.len();
 841
 842        if let Some(last_entry) = self.entries.last_mut()
 843            && let AgentThreadEntry::UserMessage(UserMessage {
 844                id,
 845                content,
 846                chunks,
 847                ..
 848            }) = last_entry
 849        {
 850            *id = message_id.or(id.take());
 851            content.append(chunk.clone(), &language_registry, cx);
 852            chunks.push(chunk);
 853            let idx = entries_len - 1;
 854            cx.emit(AcpThreadEvent::EntryUpdated(idx));
 855        } else {
 856            let content = ContentBlock::new(chunk.clone(), &language_registry, cx);
 857            self.push_entry(
 858                AgentThreadEntry::UserMessage(UserMessage {
 859                    id: message_id,
 860                    content,
 861                    chunks: vec![chunk],
 862                    checkpoint: None,
 863                }),
 864                cx,
 865            );
 866        }
 867    }
 868
 869    pub fn push_assistant_content_block(
 870        &mut self,
 871        chunk: acp::ContentBlock,
 872        is_thought: bool,
 873        cx: &mut Context<Self>,
 874    ) {
 875        let language_registry = self.project.read(cx).languages().clone();
 876        let entries_len = self.entries.len();
 877        if let Some(last_entry) = self.entries.last_mut()
 878            && let AgentThreadEntry::AssistantMessage(AssistantMessage { chunks }) = last_entry
 879        {
 880            let idx = entries_len - 1;
 881            cx.emit(AcpThreadEvent::EntryUpdated(idx));
 882            match (chunks.last_mut(), is_thought) {
 883                (Some(AssistantMessageChunk::Message { block }), false)
 884                | (Some(AssistantMessageChunk::Thought { block }), true) => {
 885                    block.append(chunk, &language_registry, cx)
 886                }
 887                _ => {
 888                    let block = ContentBlock::new(chunk, &language_registry, cx);
 889                    if is_thought {
 890                        chunks.push(AssistantMessageChunk::Thought { block })
 891                    } else {
 892                        chunks.push(AssistantMessageChunk::Message { block })
 893                    }
 894                }
 895            }
 896        } else {
 897            let block = ContentBlock::new(chunk, &language_registry, cx);
 898            let chunk = if is_thought {
 899                AssistantMessageChunk::Thought { block }
 900            } else {
 901                AssistantMessageChunk::Message { block }
 902            };
 903
 904            self.push_entry(
 905                AgentThreadEntry::AssistantMessage(AssistantMessage {
 906                    chunks: vec![chunk],
 907                }),
 908                cx,
 909            );
 910        }
 911    }
 912
 913    fn push_entry(&mut self, entry: AgentThreadEntry, cx: &mut Context<Self>) {
 914        self.entries.push(entry);
 915        cx.emit(AcpThreadEvent::NewEntry);
 916    }
 917
 918    pub fn update_tool_call(
 919        &mut self,
 920        update: impl Into<ToolCallUpdate>,
 921        cx: &mut Context<Self>,
 922    ) -> Result<()> {
 923        let update = update.into();
 924        let languages = self.project.read(cx).languages().clone();
 925
 926        let (ix, current_call) = self
 927            .tool_call_mut(update.id())
 928            .context("Tool call not found")?;
 929        match update {
 930            ToolCallUpdate::UpdateFields(update) => {
 931                let location_updated = update.fields.locations.is_some();
 932                current_call.update_fields(update.fields, languages, cx);
 933                if location_updated {
 934                    self.resolve_locations(update.id.clone(), cx);
 935                }
 936            }
 937            ToolCallUpdate::UpdateDiff(update) => {
 938                current_call.content.clear();
 939                current_call
 940                    .content
 941                    .push(ToolCallContent::Diff(update.diff));
 942            }
 943            ToolCallUpdate::UpdateTerminal(update) => {
 944                current_call.content.clear();
 945                current_call
 946                    .content
 947                    .push(ToolCallContent::Terminal(update.terminal));
 948            }
 949        }
 950
 951        cx.emit(AcpThreadEvent::EntryUpdated(ix));
 952
 953        Ok(())
 954    }
 955
 956    /// Updates a tool call if id matches an existing entry, otherwise inserts a new one.
 957    pub fn upsert_tool_call(
 958        &mut self,
 959        tool_call: acp::ToolCall,
 960        cx: &mut Context<Self>,
 961    ) -> Result<(), acp::Error> {
 962        let status = tool_call.status.into();
 963        self.upsert_tool_call_inner(tool_call.into(), status, cx)
 964    }
 965
 966    /// Fails if id does not match an existing entry.
 967    pub fn upsert_tool_call_inner(
 968        &mut self,
 969        tool_call_update: acp::ToolCallUpdate,
 970        status: ToolCallStatus,
 971        cx: &mut Context<Self>,
 972    ) -> Result<(), acp::Error> {
 973        let language_registry = self.project.read(cx).languages().clone();
 974        let id = tool_call_update.id.clone();
 975
 976        if let Some((ix, current_call)) = self.tool_call_mut(&id) {
 977            current_call.update_fields(tool_call_update.fields, language_registry, cx);
 978            current_call.status = status;
 979
 980            cx.emit(AcpThreadEvent::EntryUpdated(ix));
 981        } else {
 982            let call =
 983                ToolCall::from_acp(tool_call_update.try_into()?, status, language_registry, cx);
 984            self.push_entry(AgentThreadEntry::ToolCall(call), cx);
 985        };
 986
 987        self.resolve_locations(id, cx);
 988        Ok(())
 989    }
 990
 991    fn tool_call_mut(&mut self, id: &acp::ToolCallId) -> Option<(usize, &mut ToolCall)> {
 992        // The tool call we are looking for is typically the last one, or very close to the end.
 993        // At the moment, it doesn't seem like a hashmap would be a good fit for this use case.
 994        self.entries
 995            .iter_mut()
 996            .enumerate()
 997            .rev()
 998            .find_map(|(index, tool_call)| {
 999                if let AgentThreadEntry::ToolCall(tool_call) = tool_call
1000                    && &tool_call.id == id
1001                {
1002                    Some((index, tool_call))
1003                } else {
1004                    None
1005                }
1006            })
1007    }
1008
1009    pub fn resolve_locations(&mut self, id: acp::ToolCallId, cx: &mut Context<Self>) {
1010        let project = self.project.clone();
1011        let Some((_, tool_call)) = self.tool_call_mut(&id) else {
1012            return;
1013        };
1014        let task = tool_call.resolve_locations(project, cx);
1015        cx.spawn(async move |this, cx| {
1016            let resolved_locations = task.await;
1017            this.update(cx, |this, cx| {
1018                let project = this.project.clone();
1019                let Some((ix, tool_call)) = this.tool_call_mut(&id) else {
1020                    return;
1021                };
1022                if let Some(Some(location)) = resolved_locations.last() {
1023                    project.update(cx, |project, cx| {
1024                        if let Some(agent_location) = project.agent_location() {
1025                            let should_ignore = agent_location.buffer == location.buffer
1026                                && location
1027                                    .buffer
1028                                    .update(cx, |buffer, _| {
1029                                        let snapshot = buffer.snapshot();
1030                                        let old_position =
1031                                            agent_location.position.to_point(&snapshot);
1032                                        let new_position = location.position.to_point(&snapshot);
1033                                        // ignore this so that when we get updates from the edit tool
1034                                        // the position doesn't reset to the startof line
1035                                        old_position.row == new_position.row
1036                                            && old_position.column > new_position.column
1037                                    })
1038                                    .ok()
1039                                    .unwrap_or_default();
1040                            if !should_ignore {
1041                                project.set_agent_location(Some(location.clone()), cx);
1042                            }
1043                        }
1044                    });
1045                }
1046                if tool_call.resolved_locations != resolved_locations {
1047                    tool_call.resolved_locations = resolved_locations;
1048                    cx.emit(AcpThreadEvent::EntryUpdated(ix));
1049                }
1050            })
1051        })
1052        .detach();
1053    }
1054
1055    pub fn request_tool_call_authorization(
1056        &mut self,
1057        tool_call: acp::ToolCallUpdate,
1058        options: Vec<acp::PermissionOption>,
1059        cx: &mut Context<Self>,
1060    ) -> Result<oneshot::Receiver<acp::PermissionOptionId>, acp::Error> {
1061        let (tx, rx) = oneshot::channel();
1062
1063        let status = ToolCallStatus::WaitingForConfirmation {
1064            options,
1065            respond_tx: tx,
1066        };
1067
1068        self.upsert_tool_call_inner(tool_call, status, cx)?;
1069        cx.emit(AcpThreadEvent::ToolAuthorizationRequired);
1070        Ok(rx)
1071    }
1072
1073    pub fn authorize_tool_call(
1074        &mut self,
1075        id: acp::ToolCallId,
1076        option_id: acp::PermissionOptionId,
1077        option_kind: acp::PermissionOptionKind,
1078        cx: &mut Context<Self>,
1079    ) {
1080        let Some((ix, call)) = self.tool_call_mut(&id) else {
1081            return;
1082        };
1083
1084        let new_status = match option_kind {
1085            acp::PermissionOptionKind::RejectOnce | acp::PermissionOptionKind::RejectAlways => {
1086                ToolCallStatus::Rejected
1087            }
1088            acp::PermissionOptionKind::AllowOnce | acp::PermissionOptionKind::AllowAlways => {
1089                ToolCallStatus::InProgress
1090            }
1091        };
1092
1093        let curr_status = mem::replace(&mut call.status, new_status);
1094
1095        if let ToolCallStatus::WaitingForConfirmation { respond_tx, .. } = curr_status {
1096            respond_tx.send(option_id).log_err();
1097        } else if cfg!(debug_assertions) {
1098            panic!("tried to authorize an already authorized tool call");
1099        }
1100
1101        cx.emit(AcpThreadEvent::EntryUpdated(ix));
1102    }
1103
1104    /// Returns true if the last turn is awaiting tool authorization
1105    pub fn waiting_for_tool_confirmation(&self) -> bool {
1106        for entry in self.entries.iter().rev() {
1107            match &entry {
1108                AgentThreadEntry::ToolCall(call) => match call.status {
1109                    ToolCallStatus::WaitingForConfirmation { .. } => return true,
1110                    ToolCallStatus::Pending
1111                    | ToolCallStatus::InProgress
1112                    | ToolCallStatus::Completed
1113                    | ToolCallStatus::Failed
1114                    | ToolCallStatus::Rejected
1115                    | ToolCallStatus::Canceled => continue,
1116                },
1117                AgentThreadEntry::UserMessage(_) | AgentThreadEntry::AssistantMessage(_) => {
1118                    // Reached the beginning of the turn
1119                    return false;
1120                }
1121            }
1122        }
1123        false
1124    }
1125
1126    pub fn plan(&self) -> &Plan {
1127        &self.plan
1128    }
1129
1130    pub fn update_plan(&mut self, request: acp::Plan, cx: &mut Context<Self>) {
1131        let new_entries_len = request.entries.len();
1132        let mut new_entries = request.entries.into_iter();
1133
1134        // Reuse existing markdown to prevent flickering
1135        for (old, new) in self.plan.entries.iter_mut().zip(new_entries.by_ref()) {
1136            let PlanEntry {
1137                content,
1138                priority,
1139                status,
1140            } = old;
1141            content.update(cx, |old, cx| {
1142                old.replace(new.content, cx);
1143            });
1144            *priority = new.priority;
1145            *status = new.status;
1146        }
1147        for new in new_entries {
1148            self.plan.entries.push(PlanEntry::from_acp(new, cx))
1149        }
1150        self.plan.entries.truncate(new_entries_len);
1151
1152        cx.notify();
1153    }
1154
1155    fn clear_completed_plan_entries(&mut self, cx: &mut Context<Self>) {
1156        self.plan
1157            .entries
1158            .retain(|entry| !matches!(entry.status, acp::PlanEntryStatus::Completed));
1159        cx.notify();
1160    }
1161
1162    #[cfg(any(test, feature = "test-support"))]
1163    pub fn send_raw(
1164        &mut self,
1165        message: &str,
1166        cx: &mut Context<Self>,
1167    ) -> BoxFuture<'static, Result<()>> {
1168        self.send(
1169            vec![acp::ContentBlock::Text(acp::TextContent {
1170                text: message.to_string(),
1171                annotations: None,
1172            })],
1173            cx,
1174        )
1175    }
1176
1177    pub fn send(
1178        &mut self,
1179        message: Vec<acp::ContentBlock>,
1180        cx: &mut Context<Self>,
1181    ) -> BoxFuture<'static, Result<()>> {
1182        let block = ContentBlock::new_combined(
1183            message.clone(),
1184            self.project.read(cx).languages().clone(),
1185            cx,
1186        );
1187        let request = acp::PromptRequest {
1188            prompt: message.clone(),
1189            session_id: self.session_id.clone(),
1190        };
1191        let git_store = self.project.read(cx).git_store().clone();
1192
1193        let message_id = if self
1194            .connection
1195            .session_editor(&self.session_id, cx)
1196            .is_some()
1197        {
1198            Some(UserMessageId::new())
1199        } else {
1200            None
1201        };
1202        self.push_entry(
1203            AgentThreadEntry::UserMessage(UserMessage {
1204                id: message_id.clone(),
1205                content: block,
1206                chunks: message,
1207                checkpoint: None,
1208            }),
1209            cx,
1210        );
1211
1212        self.run_turn(cx, async move |this, cx| {
1213            let old_checkpoint = git_store
1214                .update(cx, |git, cx| git.checkpoint(cx))?
1215                .await
1216                .context("failed to get old checkpoint")
1217                .log_err();
1218            this.update(cx, |this, cx| {
1219                if let Some((_ix, message)) = this.last_user_message() {
1220                    message.checkpoint = old_checkpoint.map(|git_checkpoint| Checkpoint {
1221                        git_checkpoint,
1222                        show: false,
1223                    });
1224                }
1225                this.connection.prompt(message_id, request, cx)
1226            })?
1227            .await
1228        })
1229    }
1230
1231    pub fn resume(&mut self, cx: &mut Context<Self>) -> BoxFuture<'static, Result<()>> {
1232        self.run_turn(cx, async move |this, cx| {
1233            this.update(cx, |this, cx| {
1234                this.connection
1235                    .resume(&this.session_id, cx)
1236                    .map(|resume| resume.run(cx))
1237            })?
1238            .context("resuming a session is not supported")?
1239            .await
1240        })
1241    }
1242
1243    fn run_turn(
1244        &mut self,
1245        cx: &mut Context<Self>,
1246        f: impl 'static + AsyncFnOnce(WeakEntity<Self>, &mut AsyncApp) -> Result<acp::PromptResponse>,
1247    ) -> BoxFuture<'static, Result<()>> {
1248        self.clear_completed_plan_entries(cx);
1249
1250        let (tx, rx) = oneshot::channel();
1251        let cancel_task = self.cancel(cx);
1252
1253        self.send_task = Some(cx.spawn(async move |this, cx| {
1254            cancel_task.await;
1255            tx.send(f(this, cx).await).ok();
1256        }));
1257
1258        cx.spawn(async move |this, cx| {
1259            let response = rx.await;
1260
1261            this.update(cx, |this, cx| this.update_last_checkpoint(cx))?
1262                .await?;
1263
1264            this.update(cx, |this, cx| {
1265                match response {
1266                    Ok(Err(e)) => {
1267                        this.send_task.take();
1268                        cx.emit(AcpThreadEvent::Error);
1269                        Err(e)
1270                    }
1271                    result => {
1272                        let canceled = matches!(
1273                            result,
1274                            Ok(Ok(acp::PromptResponse {
1275                                stop_reason: acp::StopReason::Canceled
1276                            }))
1277                        );
1278
1279                        // We only take the task if the current prompt wasn't canceled.
1280                        //
1281                        // This prompt may have been canceled because another one was sent
1282                        // while it was still generating. In these cases, dropping `send_task`
1283                        // would cause the next generation to be canceled.
1284                        if !canceled {
1285                            this.send_task.take();
1286                        }
1287
1288                        cx.emit(AcpThreadEvent::Stopped);
1289                        Ok(())
1290                    }
1291                }
1292            })?
1293        })
1294        .boxed()
1295    }
1296
1297    pub fn cancel(&mut self, cx: &mut Context<Self>) -> Task<()> {
1298        let Some(send_task) = self.send_task.take() else {
1299            return Task::ready(());
1300        };
1301
1302        for entry in self.entries.iter_mut() {
1303            if let AgentThreadEntry::ToolCall(call) = entry {
1304                let cancel = matches!(
1305                    call.status,
1306                    ToolCallStatus::Pending
1307                        | ToolCallStatus::WaitingForConfirmation { .. }
1308                        | ToolCallStatus::InProgress
1309                );
1310
1311                if cancel {
1312                    call.status = ToolCallStatus::Canceled;
1313                }
1314            }
1315        }
1316
1317        self.connection.cancel(&self.session_id, cx);
1318
1319        // Wait for the send task to complete
1320        cx.foreground_executor().spawn(send_task)
1321    }
1322
1323    /// Rewinds this thread to before the entry at `index`, removing it and all
1324    /// subsequent entries while reverting any changes made from that point.
1325    pub fn rewind(&mut self, id: UserMessageId, cx: &mut Context<Self>) -> Task<Result<()>> {
1326        let Some(session_editor) = self.connection.session_editor(&self.session_id, cx) else {
1327            return Task::ready(Err(anyhow!("not supported")));
1328        };
1329        let Some(message) = self.user_message(&id) else {
1330            return Task::ready(Err(anyhow!("message not found")));
1331        };
1332
1333        let checkpoint = message
1334            .checkpoint
1335            .as_ref()
1336            .map(|c| c.git_checkpoint.clone());
1337
1338        let git_store = self.project.read(cx).git_store().clone();
1339        cx.spawn(async move |this, cx| {
1340            if let Some(checkpoint) = checkpoint {
1341                git_store
1342                    .update(cx, |git, cx| git.restore_checkpoint(checkpoint, cx))?
1343                    .await?;
1344            }
1345
1346            cx.update(|cx| session_editor.truncate(id.clone(), cx))?
1347                .await?;
1348            this.update(cx, |this, cx| {
1349                if let Some((ix, _)) = this.user_message_mut(&id) {
1350                    let range = ix..this.entries.len();
1351                    this.entries.truncate(ix);
1352                    cx.emit(AcpThreadEvent::EntriesRemoved(range));
1353                }
1354            })
1355        })
1356    }
1357
1358    fn update_last_checkpoint(&mut self, cx: &mut Context<Self>) -> Task<Result<()>> {
1359        let git_store = self.project.read(cx).git_store().clone();
1360
1361        let old_checkpoint = if let Some((_, message)) = self.last_user_message() {
1362            if let Some(checkpoint) = message.checkpoint.as_ref() {
1363                checkpoint.git_checkpoint.clone()
1364            } else {
1365                return Task::ready(Ok(()));
1366            }
1367        } else {
1368            return Task::ready(Ok(()));
1369        };
1370
1371        let new_checkpoint = git_store.update(cx, |git, cx| git.checkpoint(cx));
1372        cx.spawn(async move |this, cx| {
1373            let new_checkpoint = new_checkpoint
1374                .await
1375                .context("failed to get new checkpoint")
1376                .log_err();
1377            if let Some(new_checkpoint) = new_checkpoint {
1378                let equal = git_store
1379                    .update(cx, |git, cx| {
1380                        git.compare_checkpoints(old_checkpoint.clone(), new_checkpoint, cx)
1381                    })?
1382                    .await
1383                    .unwrap_or(true);
1384                this.update(cx, |this, cx| {
1385                    let (ix, message) = this.last_user_message().context("no user message")?;
1386                    let checkpoint = message.checkpoint.as_mut().context("no checkpoint")?;
1387                    checkpoint.show = !equal;
1388                    cx.emit(AcpThreadEvent::EntryUpdated(ix));
1389                    anyhow::Ok(())
1390                })??;
1391            }
1392
1393            Ok(())
1394        })
1395    }
1396
1397    fn last_user_message(&mut self) -> Option<(usize, &mut UserMessage)> {
1398        self.entries
1399            .iter_mut()
1400            .enumerate()
1401            .rev()
1402            .find_map(|(ix, entry)| {
1403                if let AgentThreadEntry::UserMessage(message) = entry {
1404                    Some((ix, message))
1405                } else {
1406                    None
1407                }
1408            })
1409    }
1410
1411    fn user_message(&self, id: &UserMessageId) -> Option<&UserMessage> {
1412        self.entries.iter().find_map(|entry| {
1413            if let AgentThreadEntry::UserMessage(message) = entry {
1414                if message.id.as_ref() == Some(&id) {
1415                    Some(message)
1416                } else {
1417                    None
1418                }
1419            } else {
1420                None
1421            }
1422        })
1423    }
1424
1425    fn user_message_mut(&mut self, id: &UserMessageId) -> Option<(usize, &mut UserMessage)> {
1426        self.entries.iter_mut().enumerate().find_map(|(ix, entry)| {
1427            if let AgentThreadEntry::UserMessage(message) = entry {
1428                if message.id.as_ref() == Some(&id) {
1429                    Some((ix, message))
1430                } else {
1431                    None
1432                }
1433            } else {
1434                None
1435            }
1436        })
1437    }
1438
1439    pub fn read_text_file(
1440        &self,
1441        path: PathBuf,
1442        line: Option<u32>,
1443        limit: Option<u32>,
1444        reuse_shared_snapshot: bool,
1445        cx: &mut Context<Self>,
1446    ) -> Task<Result<String>> {
1447        let project = self.project.clone();
1448        let action_log = self.action_log.clone();
1449        cx.spawn(async move |this, cx| {
1450            let load = project.update(cx, |project, cx| {
1451                let path = project
1452                    .project_path_for_absolute_path(&path, cx)
1453                    .context("invalid path")?;
1454                anyhow::Ok(project.open_buffer(path, cx))
1455            });
1456            let buffer = load??.await?;
1457
1458            let snapshot = if reuse_shared_snapshot {
1459                this.read_with(cx, |this, _| {
1460                    this.shared_buffers.get(&buffer.clone()).cloned()
1461                })
1462                .log_err()
1463                .flatten()
1464            } else {
1465                None
1466            };
1467
1468            let snapshot = if let Some(snapshot) = snapshot {
1469                snapshot
1470            } else {
1471                action_log.update(cx, |action_log, cx| {
1472                    action_log.buffer_read(buffer.clone(), cx);
1473                })?;
1474                project.update(cx, |project, cx| {
1475                    let position = buffer
1476                        .read(cx)
1477                        .snapshot()
1478                        .anchor_before(Point::new(line.unwrap_or_default(), 0));
1479                    project.set_agent_location(
1480                        Some(AgentLocation {
1481                            buffer: buffer.downgrade(),
1482                            position,
1483                        }),
1484                        cx,
1485                    );
1486                })?;
1487
1488                buffer.update(cx, |buffer, _| buffer.snapshot())?
1489            };
1490
1491            this.update(cx, |this, _| {
1492                let text = snapshot.text();
1493                this.shared_buffers.insert(buffer.clone(), snapshot);
1494                if line.is_none() && limit.is_none() {
1495                    return Ok(text);
1496                }
1497                let limit = limit.unwrap_or(u32::MAX) as usize;
1498                let Some(line) = line else {
1499                    return Ok(text.lines().take(limit).collect::<String>());
1500                };
1501
1502                let count = text.lines().count();
1503                if count < line as usize {
1504                    anyhow::bail!("There are only {} lines", count);
1505                }
1506                Ok(text
1507                    .lines()
1508                    .skip(line as usize + 1)
1509                    .take(limit)
1510                    .collect::<String>())
1511            })?
1512        })
1513    }
1514
1515    pub fn write_text_file(
1516        &self,
1517        path: PathBuf,
1518        content: String,
1519        cx: &mut Context<Self>,
1520    ) -> Task<Result<()>> {
1521        let project = self.project.clone();
1522        let action_log = self.action_log.clone();
1523        cx.spawn(async move |this, cx| {
1524            let load = project.update(cx, |project, cx| {
1525                let path = project
1526                    .project_path_for_absolute_path(&path, cx)
1527                    .context("invalid path")?;
1528                anyhow::Ok(project.open_buffer(path, cx))
1529            });
1530            let buffer = load??.await?;
1531            let snapshot = this.update(cx, |this, cx| {
1532                this.shared_buffers
1533                    .get(&buffer)
1534                    .cloned()
1535                    .unwrap_or_else(|| buffer.read(cx).snapshot())
1536            })?;
1537            let edits = cx
1538                .background_executor()
1539                .spawn(async move {
1540                    let old_text = snapshot.text();
1541                    text_diff(old_text.as_str(), &content)
1542                        .into_iter()
1543                        .map(|(range, replacement)| {
1544                            (
1545                                snapshot.anchor_after(range.start)
1546                                    ..snapshot.anchor_before(range.end),
1547                                replacement,
1548                            )
1549                        })
1550                        .collect::<Vec<_>>()
1551                })
1552                .await;
1553            cx.update(|cx| {
1554                project.update(cx, |project, cx| {
1555                    project.set_agent_location(
1556                        Some(AgentLocation {
1557                            buffer: buffer.downgrade(),
1558                            position: edits
1559                                .last()
1560                                .map(|(range, _)| range.end)
1561                                .unwrap_or(Anchor::MIN),
1562                        }),
1563                        cx,
1564                    );
1565                });
1566
1567                action_log.update(cx, |action_log, cx| {
1568                    action_log.buffer_read(buffer.clone(), cx);
1569                });
1570                buffer.update(cx, |buffer, cx| {
1571                    buffer.edit(edits, None, cx);
1572                });
1573                action_log.update(cx, |action_log, cx| {
1574                    action_log.buffer_edited(buffer.clone(), cx);
1575                });
1576            })?;
1577            project
1578                .update(cx, |project, cx| project.save_buffer(buffer, cx))?
1579                .await
1580        })
1581    }
1582
1583    pub fn to_markdown(&self, cx: &App) -> String {
1584        self.entries.iter().map(|e| e.to_markdown(cx)).collect()
1585    }
1586
1587    pub fn emit_server_exited(&mut self, status: ExitStatus, cx: &mut Context<Self>) {
1588        cx.emit(AcpThreadEvent::ServerExited(status));
1589    }
1590}
1591
1592fn markdown_for_raw_output(
1593    raw_output: &serde_json::Value,
1594    language_registry: &Arc<LanguageRegistry>,
1595    cx: &mut App,
1596) -> Option<Entity<Markdown>> {
1597    match raw_output {
1598        serde_json::Value::Null => None,
1599        serde_json::Value::Bool(value) => Some(cx.new(|cx| {
1600            Markdown::new(
1601                value.to_string().into(),
1602                Some(language_registry.clone()),
1603                None,
1604                cx,
1605            )
1606        })),
1607        serde_json::Value::Number(value) => Some(cx.new(|cx| {
1608            Markdown::new(
1609                value.to_string().into(),
1610                Some(language_registry.clone()),
1611                None,
1612                cx,
1613            )
1614        })),
1615        serde_json::Value::String(value) => Some(cx.new(|cx| {
1616            Markdown::new(
1617                value.clone().into(),
1618                Some(language_registry.clone()),
1619                None,
1620                cx,
1621            )
1622        })),
1623        value => Some(cx.new(|cx| {
1624            Markdown::new(
1625                format!("```json\n{}\n```", value).into(),
1626                Some(language_registry.clone()),
1627                None,
1628                cx,
1629            )
1630        })),
1631    }
1632}
1633
1634#[cfg(test)]
1635mod tests {
1636    use super::*;
1637    use anyhow::anyhow;
1638    use futures::{channel::mpsc, future::LocalBoxFuture, select};
1639    use gpui::{AsyncApp, TestAppContext, WeakEntity};
1640    use indoc::indoc;
1641    use project::{FakeFs, Fs};
1642    use rand::Rng as _;
1643    use serde_json::json;
1644    use settings::SettingsStore;
1645    use smol::stream::StreamExt as _;
1646    use std::{
1647        any::Any,
1648        cell::RefCell,
1649        path::Path,
1650        rc::Rc,
1651        sync::atomic::{AtomicBool, AtomicUsize, Ordering::SeqCst},
1652        time::Duration,
1653    };
1654    use util::path;
1655
1656    fn init_test(cx: &mut TestAppContext) {
1657        env_logger::try_init().ok();
1658        cx.update(|cx| {
1659            let settings_store = SettingsStore::test(cx);
1660            cx.set_global(settings_store);
1661            Project::init_settings(cx);
1662            language::init(cx);
1663        });
1664    }
1665
1666    #[gpui::test]
1667    async fn test_push_user_content_block(cx: &mut gpui::TestAppContext) {
1668        init_test(cx);
1669
1670        let fs = FakeFs::new(cx.executor());
1671        let project = Project::test(fs, [], cx).await;
1672        let connection = Rc::new(FakeAgentConnection::new());
1673        let thread = cx
1674            .update(|cx| connection.new_thread(project, Path::new(path!("/test")), cx))
1675            .await
1676            .unwrap();
1677
1678        // Test creating a new user message
1679        thread.update(cx, |thread, cx| {
1680            thread.push_user_content_block(
1681                None,
1682                acp::ContentBlock::Text(acp::TextContent {
1683                    annotations: None,
1684                    text: "Hello, ".to_string(),
1685                }),
1686                cx,
1687            );
1688        });
1689
1690        thread.update(cx, |thread, cx| {
1691            assert_eq!(thread.entries.len(), 1);
1692            if let AgentThreadEntry::UserMessage(user_msg) = &thread.entries[0] {
1693                assert_eq!(user_msg.id, None);
1694                assert_eq!(user_msg.content.to_markdown(cx), "Hello, ");
1695            } else {
1696                panic!("Expected UserMessage");
1697            }
1698        });
1699
1700        // Test appending to existing user message
1701        let message_1_id = UserMessageId::new();
1702        thread.update(cx, |thread, cx| {
1703            thread.push_user_content_block(
1704                Some(message_1_id.clone()),
1705                acp::ContentBlock::Text(acp::TextContent {
1706                    annotations: None,
1707                    text: "world!".to_string(),
1708                }),
1709                cx,
1710            );
1711        });
1712
1713        thread.update(cx, |thread, cx| {
1714            assert_eq!(thread.entries.len(), 1);
1715            if let AgentThreadEntry::UserMessage(user_msg) = &thread.entries[0] {
1716                assert_eq!(user_msg.id, Some(message_1_id));
1717                assert_eq!(user_msg.content.to_markdown(cx), "Hello, world!");
1718            } else {
1719                panic!("Expected UserMessage");
1720            }
1721        });
1722
1723        // Test creating new user message after assistant message
1724        thread.update(cx, |thread, cx| {
1725            thread.push_assistant_content_block(
1726                acp::ContentBlock::Text(acp::TextContent {
1727                    annotations: None,
1728                    text: "Assistant response".to_string(),
1729                }),
1730                false,
1731                cx,
1732            );
1733        });
1734
1735        let message_2_id = UserMessageId::new();
1736        thread.update(cx, |thread, cx| {
1737            thread.push_user_content_block(
1738                Some(message_2_id.clone()),
1739                acp::ContentBlock::Text(acp::TextContent {
1740                    annotations: None,
1741                    text: "New user message".to_string(),
1742                }),
1743                cx,
1744            );
1745        });
1746
1747        thread.update(cx, |thread, cx| {
1748            assert_eq!(thread.entries.len(), 3);
1749            if let AgentThreadEntry::UserMessage(user_msg) = &thread.entries[2] {
1750                assert_eq!(user_msg.id, Some(message_2_id));
1751                assert_eq!(user_msg.content.to_markdown(cx), "New user message");
1752            } else {
1753                panic!("Expected UserMessage at index 2");
1754            }
1755        });
1756    }
1757
1758    #[gpui::test]
1759    async fn test_thinking_concatenation(cx: &mut gpui::TestAppContext) {
1760        init_test(cx);
1761
1762        let fs = FakeFs::new(cx.executor());
1763        let project = Project::test(fs, [], cx).await;
1764        let connection = Rc::new(FakeAgentConnection::new().on_user_message(
1765            |_, thread, mut cx| {
1766                async move {
1767                    thread.update(&mut cx, |thread, cx| {
1768                        thread
1769                            .handle_session_update(
1770                                acp::SessionUpdate::AgentThoughtChunk {
1771                                    content: "Thinking ".into(),
1772                                },
1773                                cx,
1774                            )
1775                            .unwrap();
1776                        thread
1777                            .handle_session_update(
1778                                acp::SessionUpdate::AgentThoughtChunk {
1779                                    content: "hard!".into(),
1780                                },
1781                                cx,
1782                            )
1783                            .unwrap();
1784                    })?;
1785                    Ok(acp::PromptResponse {
1786                        stop_reason: acp::StopReason::EndTurn,
1787                    })
1788                }
1789                .boxed_local()
1790            },
1791        ));
1792
1793        let thread = cx
1794            .update(|cx| connection.new_thread(project, Path::new(path!("/test")), cx))
1795            .await
1796            .unwrap();
1797
1798        thread
1799            .update(cx, |thread, cx| thread.send_raw("Hello from Zed!", cx))
1800            .await
1801            .unwrap();
1802
1803        let output = thread.read_with(cx, |thread, cx| thread.to_markdown(cx));
1804        assert_eq!(
1805            output,
1806            indoc! {r#"
1807            ## User
1808
1809            Hello from Zed!
1810
1811            ## Assistant
1812
1813            <thinking>
1814            Thinking hard!
1815            </thinking>
1816
1817            "#}
1818        );
1819    }
1820
1821    #[gpui::test]
1822    async fn test_edits_concurrently_to_user(cx: &mut TestAppContext) {
1823        init_test(cx);
1824
1825        let fs = FakeFs::new(cx.executor());
1826        fs.insert_tree(path!("/tmp"), json!({"foo": "one\ntwo\nthree\n"}))
1827            .await;
1828        let project = Project::test(fs.clone(), [], cx).await;
1829        let (read_file_tx, read_file_rx) = oneshot::channel::<()>();
1830        let read_file_tx = Rc::new(RefCell::new(Some(read_file_tx)));
1831        let connection = Rc::new(FakeAgentConnection::new().on_user_message(
1832            move |_, thread, mut cx| {
1833                let read_file_tx = read_file_tx.clone();
1834                async move {
1835                    let content = thread
1836                        .update(&mut cx, |thread, cx| {
1837                            thread.read_text_file(path!("/tmp/foo").into(), None, None, false, cx)
1838                        })
1839                        .unwrap()
1840                        .await
1841                        .unwrap();
1842                    assert_eq!(content, "one\ntwo\nthree\n");
1843                    read_file_tx.take().unwrap().send(()).unwrap();
1844                    thread
1845                        .update(&mut cx, |thread, cx| {
1846                            thread.write_text_file(
1847                                path!("/tmp/foo").into(),
1848                                "one\ntwo\nthree\nfour\nfive\n".to_string(),
1849                                cx,
1850                            )
1851                        })
1852                        .unwrap()
1853                        .await
1854                        .unwrap();
1855                    Ok(acp::PromptResponse {
1856                        stop_reason: acp::StopReason::EndTurn,
1857                    })
1858                }
1859                .boxed_local()
1860            },
1861        ));
1862
1863        let (worktree, pathbuf) = project
1864            .update(cx, |project, cx| {
1865                project.find_or_create_worktree(path!("/tmp/foo"), true, cx)
1866            })
1867            .await
1868            .unwrap();
1869        let buffer = project
1870            .update(cx, |project, cx| {
1871                project.open_buffer((worktree.read(cx).id(), pathbuf), cx)
1872            })
1873            .await
1874            .unwrap();
1875
1876        let thread = cx
1877            .update(|cx| connection.new_thread(project, Path::new(path!("/tmp")), cx))
1878            .await
1879            .unwrap();
1880
1881        let request = thread.update(cx, |thread, cx| {
1882            thread.send_raw("Extend the count in /tmp/foo", cx)
1883        });
1884        read_file_rx.await.ok();
1885        buffer.update(cx, |buffer, cx| {
1886            buffer.edit([(0..0, "zero\n".to_string())], None, cx);
1887        });
1888        cx.run_until_parked();
1889        assert_eq!(
1890            buffer.read_with(cx, |buffer, _| buffer.text()),
1891            "zero\none\ntwo\nthree\nfour\nfive\n"
1892        );
1893        assert_eq!(
1894            String::from_utf8(fs.read_file_sync(path!("/tmp/foo")).unwrap()).unwrap(),
1895            "zero\none\ntwo\nthree\nfour\nfive\n"
1896        );
1897        request.await.unwrap();
1898    }
1899
1900    #[gpui::test]
1901    async fn test_succeeding_canceled_toolcall(cx: &mut TestAppContext) {
1902        init_test(cx);
1903
1904        let fs = FakeFs::new(cx.executor());
1905        let project = Project::test(fs, [], cx).await;
1906        let id = acp::ToolCallId("test".into());
1907
1908        let connection = Rc::new(FakeAgentConnection::new().on_user_message({
1909            let id = id.clone();
1910            move |_, thread, mut cx| {
1911                let id = id.clone();
1912                async move {
1913                    thread
1914                        .update(&mut cx, |thread, cx| {
1915                            thread.handle_session_update(
1916                                acp::SessionUpdate::ToolCall(acp::ToolCall {
1917                                    id: id.clone(),
1918                                    title: "Label".into(),
1919                                    kind: acp::ToolKind::Fetch,
1920                                    status: acp::ToolCallStatus::InProgress,
1921                                    content: vec![],
1922                                    locations: vec![],
1923                                    raw_input: None,
1924                                    raw_output: None,
1925                                }),
1926                                cx,
1927                            )
1928                        })
1929                        .unwrap()
1930                        .unwrap();
1931                    Ok(acp::PromptResponse {
1932                        stop_reason: acp::StopReason::EndTurn,
1933                    })
1934                }
1935                .boxed_local()
1936            }
1937        }));
1938
1939        let thread = cx
1940            .update(|cx| connection.new_thread(project, Path::new(path!("/test")), cx))
1941            .await
1942            .unwrap();
1943
1944        let request = thread.update(cx, |thread, cx| {
1945            thread.send_raw("Fetch https://example.com", cx)
1946        });
1947
1948        run_until_first_tool_call(&thread, cx).await;
1949
1950        thread.read_with(cx, |thread, _| {
1951            assert!(matches!(
1952                thread.entries[1],
1953                AgentThreadEntry::ToolCall(ToolCall {
1954                    status: ToolCallStatus::InProgress,
1955                    ..
1956                })
1957            ));
1958        });
1959
1960        thread.update(cx, |thread, cx| thread.cancel(cx)).await;
1961
1962        thread.read_with(cx, |thread, _| {
1963            assert!(matches!(
1964                &thread.entries[1],
1965                AgentThreadEntry::ToolCall(ToolCall {
1966                    status: ToolCallStatus::Canceled,
1967                    ..
1968                })
1969            ));
1970        });
1971
1972        thread
1973            .update(cx, |thread, cx| {
1974                thread.handle_session_update(
1975                    acp::SessionUpdate::ToolCallUpdate(acp::ToolCallUpdate {
1976                        id,
1977                        fields: acp::ToolCallUpdateFields {
1978                            status: Some(acp::ToolCallStatus::Completed),
1979                            ..Default::default()
1980                        },
1981                    }),
1982                    cx,
1983                )
1984            })
1985            .unwrap();
1986
1987        request.await.unwrap();
1988
1989        thread.read_with(cx, |thread, _| {
1990            assert!(matches!(
1991                thread.entries[1],
1992                AgentThreadEntry::ToolCall(ToolCall {
1993                    status: ToolCallStatus::Completed,
1994                    ..
1995                })
1996            ));
1997        });
1998    }
1999
2000    #[gpui::test]
2001    async fn test_no_pending_edits_if_tool_calls_are_completed(cx: &mut TestAppContext) {
2002        init_test(cx);
2003        let fs = FakeFs::new(cx.background_executor.clone());
2004        fs.insert_tree(path!("/test"), json!({})).await;
2005        let project = Project::test(fs, [path!("/test").as_ref()], cx).await;
2006
2007        let connection = Rc::new(FakeAgentConnection::new().on_user_message({
2008            move |_, thread, mut cx| {
2009                async move {
2010                    thread
2011                        .update(&mut cx, |thread, cx| {
2012                            thread.handle_session_update(
2013                                acp::SessionUpdate::ToolCall(acp::ToolCall {
2014                                    id: acp::ToolCallId("test".into()),
2015                                    title: "Label".into(),
2016                                    kind: acp::ToolKind::Edit,
2017                                    status: acp::ToolCallStatus::Completed,
2018                                    content: vec![acp::ToolCallContent::Diff {
2019                                        diff: acp::Diff {
2020                                            path: "/test/test.txt".into(),
2021                                            old_text: None,
2022                                            new_text: "foo".into(),
2023                                        },
2024                                    }],
2025                                    locations: vec![],
2026                                    raw_input: None,
2027                                    raw_output: None,
2028                                }),
2029                                cx,
2030                            )
2031                        })
2032                        .unwrap()
2033                        .unwrap();
2034                    Ok(acp::PromptResponse {
2035                        stop_reason: acp::StopReason::EndTurn,
2036                    })
2037                }
2038                .boxed_local()
2039            }
2040        }));
2041
2042        let thread = cx
2043            .update(|cx| connection.new_thread(project, Path::new(path!("/test")), cx))
2044            .await
2045            .unwrap();
2046
2047        cx.update(|cx| thread.update(cx, |thread, cx| thread.send(vec!["Hi".into()], cx)))
2048            .await
2049            .unwrap();
2050
2051        assert!(cx.read(|cx| !thread.read(cx).has_pending_edit_tool_calls()));
2052    }
2053
2054    #[gpui::test(iterations = 10)]
2055    async fn test_checkpoints(cx: &mut TestAppContext) {
2056        init_test(cx);
2057        let fs = FakeFs::new(cx.background_executor.clone());
2058        fs.insert_tree(
2059            path!("/test"),
2060            json!({
2061                ".git": {}
2062            }),
2063        )
2064        .await;
2065        let project = Project::test(fs.clone(), [path!("/test").as_ref()], cx).await;
2066
2067        let simulate_changes = Arc::new(AtomicBool::new(true));
2068        let next_filename = Arc::new(AtomicUsize::new(0));
2069        let connection = Rc::new(FakeAgentConnection::new().on_user_message({
2070            let simulate_changes = simulate_changes.clone();
2071            let next_filename = next_filename.clone();
2072            let fs = fs.clone();
2073            move |request, thread, mut cx| {
2074                let fs = fs.clone();
2075                let simulate_changes = simulate_changes.clone();
2076                let next_filename = next_filename.clone();
2077                async move {
2078                    if simulate_changes.load(SeqCst) {
2079                        let filename = format!("/test/file-{}", next_filename.fetch_add(1, SeqCst));
2080                        fs.write(Path::new(&filename), b"").await?;
2081                    }
2082
2083                    let acp::ContentBlock::Text(content) = &request.prompt[0] else {
2084                        panic!("expected text content block");
2085                    };
2086                    thread.update(&mut cx, |thread, cx| {
2087                        thread
2088                            .handle_session_update(
2089                                acp::SessionUpdate::AgentMessageChunk {
2090                                    content: content.text.to_uppercase().into(),
2091                                },
2092                                cx,
2093                            )
2094                            .unwrap();
2095                    })?;
2096                    Ok(acp::PromptResponse {
2097                        stop_reason: acp::StopReason::EndTurn,
2098                    })
2099                }
2100                .boxed_local()
2101            }
2102        }));
2103        let thread = cx
2104            .update(|cx| connection.new_thread(project, Path::new(path!("/test")), cx))
2105            .await
2106            .unwrap();
2107
2108        cx.update(|cx| thread.update(cx, |thread, cx| thread.send(vec!["Lorem".into()], cx)))
2109            .await
2110            .unwrap();
2111        thread.read_with(cx, |thread, cx| {
2112            assert_eq!(
2113                thread.to_markdown(cx),
2114                indoc! {"
2115                    ## User (checkpoint)
2116
2117                    Lorem
2118
2119                    ## Assistant
2120
2121                    LOREM
2122
2123                "}
2124            );
2125        });
2126        assert_eq!(fs.files(), vec![Path::new("/test/file-0")]);
2127
2128        cx.update(|cx| thread.update(cx, |thread, cx| thread.send(vec!["ipsum".into()], cx)))
2129            .await
2130            .unwrap();
2131        thread.read_with(cx, |thread, cx| {
2132            assert_eq!(
2133                thread.to_markdown(cx),
2134                indoc! {"
2135                    ## User (checkpoint)
2136
2137                    Lorem
2138
2139                    ## Assistant
2140
2141                    LOREM
2142
2143                    ## User (checkpoint)
2144
2145                    ipsum
2146
2147                    ## Assistant
2148
2149                    IPSUM
2150
2151                "}
2152            );
2153        });
2154        assert_eq!(
2155            fs.files(),
2156            vec![Path::new("/test/file-0"), Path::new("/test/file-1")]
2157        );
2158
2159        // Checkpoint isn't stored when there are no changes.
2160        simulate_changes.store(false, SeqCst);
2161        cx.update(|cx| thread.update(cx, |thread, cx| thread.send(vec!["dolor".into()], cx)))
2162            .await
2163            .unwrap();
2164        thread.read_with(cx, |thread, cx| {
2165            assert_eq!(
2166                thread.to_markdown(cx),
2167                indoc! {"
2168                    ## User (checkpoint)
2169
2170                    Lorem
2171
2172                    ## Assistant
2173
2174                    LOREM
2175
2176                    ## User (checkpoint)
2177
2178                    ipsum
2179
2180                    ## Assistant
2181
2182                    IPSUM
2183
2184                    ## User
2185
2186                    dolor
2187
2188                    ## Assistant
2189
2190                    DOLOR
2191
2192                "}
2193            );
2194        });
2195        assert_eq!(
2196            fs.files(),
2197            vec![Path::new("/test/file-0"), Path::new("/test/file-1")]
2198        );
2199
2200        // Rewinding the conversation truncates the history and restores the checkpoint.
2201        thread
2202            .update(cx, |thread, cx| {
2203                let AgentThreadEntry::UserMessage(message) = &thread.entries[2] else {
2204                    panic!("unexpected entries {:?}", thread.entries)
2205                };
2206                thread.rewind(message.id.clone().unwrap(), cx)
2207            })
2208            .await
2209            .unwrap();
2210        thread.read_with(cx, |thread, cx| {
2211            assert_eq!(
2212                thread.to_markdown(cx),
2213                indoc! {"
2214                    ## User (checkpoint)
2215
2216                    Lorem
2217
2218                    ## Assistant
2219
2220                    LOREM
2221
2222                "}
2223            );
2224        });
2225        assert_eq!(fs.files(), vec![Path::new("/test/file-0")]);
2226    }
2227
2228    async fn run_until_first_tool_call(
2229        thread: &Entity<AcpThread>,
2230        cx: &mut TestAppContext,
2231    ) -> usize {
2232        let (mut tx, mut rx) = mpsc::channel::<usize>(1);
2233
2234        let subscription = cx.update(|cx| {
2235            cx.subscribe(thread, move |thread, _, cx| {
2236                for (ix, entry) in thread.read(cx).entries.iter().enumerate() {
2237                    if matches!(entry, AgentThreadEntry::ToolCall(_)) {
2238                        return tx.try_send(ix).unwrap();
2239                    }
2240                }
2241            })
2242        });
2243
2244        select! {
2245            _ = futures::FutureExt::fuse(smol::Timer::after(Duration::from_secs(10))) => {
2246                panic!("Timeout waiting for tool call")
2247            }
2248            ix = rx.next().fuse() => {
2249                drop(subscription);
2250                ix.unwrap()
2251            }
2252        }
2253    }
2254
2255    #[derive(Clone, Default)]
2256    struct FakeAgentConnection {
2257        auth_methods: Vec<acp::AuthMethod>,
2258        sessions: Arc<parking_lot::Mutex<HashMap<acp::SessionId, WeakEntity<AcpThread>>>>,
2259        on_user_message: Option<
2260            Rc<
2261                dyn Fn(
2262                        acp::PromptRequest,
2263                        WeakEntity<AcpThread>,
2264                        AsyncApp,
2265                    ) -> LocalBoxFuture<'static, Result<acp::PromptResponse>>
2266                    + 'static,
2267            >,
2268        >,
2269    }
2270
2271    impl FakeAgentConnection {
2272        fn new() -> Self {
2273            Self {
2274                auth_methods: Vec::new(),
2275                on_user_message: None,
2276                sessions: Arc::default(),
2277            }
2278        }
2279
2280        #[expect(unused)]
2281        fn with_auth_methods(mut self, auth_methods: Vec<acp::AuthMethod>) -> Self {
2282            self.auth_methods = auth_methods;
2283            self
2284        }
2285
2286        fn on_user_message(
2287            mut self,
2288            handler: impl Fn(
2289                acp::PromptRequest,
2290                WeakEntity<AcpThread>,
2291                AsyncApp,
2292            ) -> LocalBoxFuture<'static, Result<acp::PromptResponse>>
2293            + 'static,
2294        ) -> Self {
2295            self.on_user_message.replace(Rc::new(handler));
2296            self
2297        }
2298    }
2299
2300    impl AgentConnection for FakeAgentConnection {
2301        fn auth_methods(&self) -> &[acp::AuthMethod] {
2302            &self.auth_methods
2303        }
2304
2305        fn new_thread(
2306            self: Rc<Self>,
2307            project: Entity<Project>,
2308            _cwd: &Path,
2309            cx: &mut gpui::App,
2310        ) -> Task<gpui::Result<Entity<AcpThread>>> {
2311            let session_id = acp::SessionId(
2312                rand::thread_rng()
2313                    .sample_iter(&rand::distributions::Alphanumeric)
2314                    .take(7)
2315                    .map(char::from)
2316                    .collect::<String>()
2317                    .into(),
2318            );
2319            let thread =
2320                cx.new(|cx| AcpThread::new("Test", self.clone(), project, session_id.clone(), cx));
2321            self.sessions.lock().insert(session_id, thread.downgrade());
2322            Task::ready(Ok(thread))
2323        }
2324
2325        fn authenticate(&self, method: acp::AuthMethodId, _cx: &mut App) -> Task<gpui::Result<()>> {
2326            if self.auth_methods().iter().any(|m| m.id == method) {
2327                Task::ready(Ok(()))
2328            } else {
2329                Task::ready(Err(anyhow!("Invalid Auth Method")))
2330            }
2331        }
2332
2333        fn prompt(
2334            &self,
2335            _id: Option<UserMessageId>,
2336            params: acp::PromptRequest,
2337            cx: &mut App,
2338        ) -> Task<gpui::Result<acp::PromptResponse>> {
2339            let sessions = self.sessions.lock();
2340            let thread = sessions.get(&params.session_id).unwrap();
2341            if let Some(handler) = &self.on_user_message {
2342                let handler = handler.clone();
2343                let thread = thread.clone();
2344                cx.spawn(async move |cx| handler(params, thread, cx.clone()).await)
2345            } else {
2346                Task::ready(Ok(acp::PromptResponse {
2347                    stop_reason: acp::StopReason::EndTurn,
2348                }))
2349            }
2350        }
2351
2352        fn cancel(&self, session_id: &acp::SessionId, cx: &mut App) {
2353            let sessions = self.sessions.lock();
2354            let thread = sessions.get(&session_id).unwrap().clone();
2355
2356            cx.spawn(async move |cx| {
2357                thread
2358                    .update(cx, |thread, cx| thread.cancel(cx))
2359                    .unwrap()
2360                    .await
2361            })
2362            .detach();
2363        }
2364
2365        fn session_editor(
2366            &self,
2367            session_id: &acp::SessionId,
2368            _cx: &mut App,
2369        ) -> Option<Rc<dyn AgentSessionEditor>> {
2370            Some(Rc::new(FakeAgentSessionEditor {
2371                _session_id: session_id.clone(),
2372            }))
2373        }
2374
2375        fn into_any(self: Rc<Self>) -> Rc<dyn Any> {
2376            self
2377        }
2378    }
2379
2380    struct FakeAgentSessionEditor {
2381        _session_id: acp::SessionId,
2382    }
2383
2384    impl AgentSessionEditor for FakeAgentSessionEditor {
2385        fn truncate(&self, _message_id: UserMessageId, _cx: &mut App) -> Task<Result<()>> {
2386            Task::ready(Ok(()))
2387        }
2388    }
2389}