1#[cfg(test)]
   2mod context_tests;
   3
   4use crate::{
   5    prompts::PromptBuilder, slash_command::SlashCommandLine, MessageId, MessageStatus,
   6    WorkflowStep, WorkflowStepEdit, WorkflowStepResolution, WorkflowSuggestionGroup,
   7};
   8use anyhow::{anyhow, Context as _, Result};
   9use assistant_slash_command::{
  10    SlashCommandOutput, SlashCommandOutputSection, SlashCommandRegistry,
  11};
  12use assistant_tool::ToolRegistry;
  13use client::{self, proto, telemetry::Telemetry};
  14use clock::ReplicaId;
  15use collections::{HashMap, HashSet};
  16use feature_flags::{FeatureFlag, FeatureFlagAppExt};
  17use fs::{Fs, RemoveOptions};
  18use futures::{
  19    future::{self, Shared},
  20    FutureExt, StreamExt,
  21};
  22use gpui::{
  23    AppContext, AsyncAppContext, Context as _, EventEmitter, Model, ModelContext, RenderImage,
  24    SharedString, Subscription, Task,
  25};
  26
  27use language::{AnchorRangeExt, Bias, Buffer, LanguageRegistry, OffsetRangeExt, Point, ToOffset};
  28use language_model::{
  29    LanguageModel, LanguageModelCacheConfiguration, LanguageModelCompletionEvent,
  30    LanguageModelImage, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
  31    LanguageModelRequestTool, LanguageModelToolResult, LanguageModelToolUse, MessageContent, Role,
  32    StopReason,
  33};
  34use open_ai::Model as OpenAiModel;
  35use paths::contexts_dir;
  36use project::Project;
  37use serde::{Deserialize, Serialize};
  38use smallvec::SmallVec;
  39use std::{
  40    cmp::{self, max, Ordering},
  41    fmt::Debug,
  42    iter, mem,
  43    ops::Range,
  44    path::{Path, PathBuf},
  45    str::FromStr as _,
  46    sync::Arc,
  47    time::{Duration, Instant},
  48};
  49use telemetry_events::AssistantKind;
  50use text::BufferSnapshot;
  51use util::{post_inc, TryFutureExt};
  52use uuid::Uuid;
  53
  54#[derive(Clone, Eq, PartialEq, Hash, PartialOrd, Ord, Serialize, Deserialize)]
  55pub struct ContextId(String);
  56
  57impl ContextId {
  58    pub fn new() -> Self {
  59        Self(Uuid::new_v4().to_string())
  60    }
  61
  62    pub fn from_proto(id: String) -> Self {
  63        Self(id)
  64    }
  65
  66    pub fn to_proto(&self) -> String {
  67        self.0.clone()
  68    }
  69}
  70
  71#[derive(Clone, Debug)]
  72pub enum ContextOperation {
  73    InsertMessage {
  74        anchor: MessageAnchor,
  75        metadata: MessageMetadata,
  76        version: clock::Global,
  77    },
  78    UpdateMessage {
  79        message_id: MessageId,
  80        metadata: MessageMetadata,
  81        version: clock::Global,
  82    },
  83    UpdateSummary {
  84        summary: ContextSummary,
  85        version: clock::Global,
  86    },
  87    SlashCommandFinished {
  88        id: SlashCommandId,
  89        output_range: Range<language::Anchor>,
  90        sections: Vec<SlashCommandOutputSection<language::Anchor>>,
  91        version: clock::Global,
  92    },
  93    BufferOperation(language::Operation),
  94}
  95
  96impl ContextOperation {
  97    pub fn from_proto(op: proto::ContextOperation) -> Result<Self> {
  98        match op.variant.context("invalid variant")? {
  99            proto::context_operation::Variant::InsertMessage(insert) => {
 100                let message = insert.message.context("invalid message")?;
 101                let id = MessageId(language::proto::deserialize_timestamp(
 102                    message.id.context("invalid id")?,
 103                ));
 104                Ok(Self::InsertMessage {
 105                    anchor: MessageAnchor {
 106                        id,
 107                        start: language::proto::deserialize_anchor(
 108                            message.start.context("invalid anchor")?,
 109                        )
 110                        .context("invalid anchor")?,
 111                    },
 112                    metadata: MessageMetadata {
 113                        role: Role::from_proto(message.role),
 114                        status: MessageStatus::from_proto(
 115                            message.status.context("invalid status")?,
 116                        ),
 117                        timestamp: id.0,
 118                        cache: None,
 119                    },
 120                    version: language::proto::deserialize_version(&insert.version),
 121                })
 122            }
 123            proto::context_operation::Variant::UpdateMessage(update) => Ok(Self::UpdateMessage {
 124                message_id: MessageId(language::proto::deserialize_timestamp(
 125                    update.message_id.context("invalid message id")?,
 126                )),
 127                metadata: MessageMetadata {
 128                    role: Role::from_proto(update.role),
 129                    status: MessageStatus::from_proto(update.status.context("invalid status")?),
 130                    timestamp: language::proto::deserialize_timestamp(
 131                        update.timestamp.context("invalid timestamp")?,
 132                    ),
 133                    cache: None,
 134                },
 135                version: language::proto::deserialize_version(&update.version),
 136            }),
 137            proto::context_operation::Variant::UpdateSummary(update) => Ok(Self::UpdateSummary {
 138                summary: ContextSummary {
 139                    text: update.summary,
 140                    done: update.done,
 141                    timestamp: language::proto::deserialize_timestamp(
 142                        update.timestamp.context("invalid timestamp")?,
 143                    ),
 144                },
 145                version: language::proto::deserialize_version(&update.version),
 146            }),
 147            proto::context_operation::Variant::SlashCommandFinished(finished) => {
 148                Ok(Self::SlashCommandFinished {
 149                    id: SlashCommandId(language::proto::deserialize_timestamp(
 150                        finished.id.context("invalid id")?,
 151                    )),
 152                    output_range: language::proto::deserialize_anchor_range(
 153                        finished.output_range.context("invalid range")?,
 154                    )?,
 155                    sections: finished
 156                        .sections
 157                        .into_iter()
 158                        .map(|section| {
 159                            Ok(SlashCommandOutputSection {
 160                                range: language::proto::deserialize_anchor_range(
 161                                    section.range.context("invalid range")?,
 162                                )?,
 163                                icon: section.icon_name.parse()?,
 164                                label: section.label.into(),
 165                            })
 166                        })
 167                        .collect::<Result<Vec<_>>>()?,
 168                    version: language::proto::deserialize_version(&finished.version),
 169                })
 170            }
 171            proto::context_operation::Variant::BufferOperation(op) => Ok(Self::BufferOperation(
 172                language::proto::deserialize_operation(
 173                    op.operation.context("invalid buffer operation")?,
 174                )?,
 175            )),
 176        }
 177    }
 178
 179    pub fn to_proto(&self) -> proto::ContextOperation {
 180        match self {
 181            Self::InsertMessage {
 182                anchor,
 183                metadata,
 184                version,
 185            } => proto::ContextOperation {
 186                variant: Some(proto::context_operation::Variant::InsertMessage(
 187                    proto::context_operation::InsertMessage {
 188                        message: Some(proto::ContextMessage {
 189                            id: Some(language::proto::serialize_timestamp(anchor.id.0)),
 190                            start: Some(language::proto::serialize_anchor(&anchor.start)),
 191                            role: metadata.role.to_proto() as i32,
 192                            status: Some(metadata.status.to_proto()),
 193                        }),
 194                        version: language::proto::serialize_version(version),
 195                    },
 196                )),
 197            },
 198            Self::UpdateMessage {
 199                message_id,
 200                metadata,
 201                version,
 202            } => proto::ContextOperation {
 203                variant: Some(proto::context_operation::Variant::UpdateMessage(
 204                    proto::context_operation::UpdateMessage {
 205                        message_id: Some(language::proto::serialize_timestamp(message_id.0)),
 206                        role: metadata.role.to_proto() as i32,
 207                        status: Some(metadata.status.to_proto()),
 208                        timestamp: Some(language::proto::serialize_timestamp(metadata.timestamp)),
 209                        version: language::proto::serialize_version(version),
 210                    },
 211                )),
 212            },
 213            Self::UpdateSummary { summary, version } => proto::ContextOperation {
 214                variant: Some(proto::context_operation::Variant::UpdateSummary(
 215                    proto::context_operation::UpdateSummary {
 216                        summary: summary.text.clone(),
 217                        done: summary.done,
 218                        timestamp: Some(language::proto::serialize_timestamp(summary.timestamp)),
 219                        version: language::proto::serialize_version(version),
 220                    },
 221                )),
 222            },
 223            Self::SlashCommandFinished {
 224                id,
 225                output_range,
 226                sections,
 227                version,
 228            } => proto::ContextOperation {
 229                variant: Some(proto::context_operation::Variant::SlashCommandFinished(
 230                    proto::context_operation::SlashCommandFinished {
 231                        id: Some(language::proto::serialize_timestamp(id.0)),
 232                        output_range: Some(language::proto::serialize_anchor_range(
 233                            output_range.clone(),
 234                        )),
 235                        sections: sections
 236                            .iter()
 237                            .map(|section| {
 238                                let icon_name: &'static str = section.icon.into();
 239                                proto::SlashCommandOutputSection {
 240                                    range: Some(language::proto::serialize_anchor_range(
 241                                        section.range.clone(),
 242                                    )),
 243                                    icon_name: icon_name.to_string(),
 244                                    label: section.label.to_string(),
 245                                }
 246                            })
 247                            .collect(),
 248                        version: language::proto::serialize_version(version),
 249                    },
 250                )),
 251            },
 252            Self::BufferOperation(operation) => proto::ContextOperation {
 253                variant: Some(proto::context_operation::Variant::BufferOperation(
 254                    proto::context_operation::BufferOperation {
 255                        operation: Some(language::proto::serialize_operation(operation)),
 256                    },
 257                )),
 258            },
 259        }
 260    }
 261
 262    fn timestamp(&self) -> clock::Lamport {
 263        match self {
 264            Self::InsertMessage { anchor, .. } => anchor.id.0,
 265            Self::UpdateMessage { metadata, .. } => metadata.timestamp,
 266            Self::UpdateSummary { summary, .. } => summary.timestamp,
 267            Self::SlashCommandFinished { id, .. } => id.0,
 268            Self::BufferOperation(_) => {
 269                panic!("reading the timestamp of a buffer operation is not supported")
 270            }
 271        }
 272    }
 273
 274    /// Returns the current version of the context operation.
 275    pub fn version(&self) -> &clock::Global {
 276        match self {
 277            Self::InsertMessage { version, .. }
 278            | Self::UpdateMessage { version, .. }
 279            | Self::UpdateSummary { version, .. }
 280            | Self::SlashCommandFinished { version, .. } => version,
 281            Self::BufferOperation(_) => {
 282                panic!("reading the version of a buffer operation is not supported")
 283            }
 284        }
 285    }
 286}
 287
 288#[derive(Debug, Clone)]
 289pub enum ContextEvent {
 290    ShowAssistError(SharedString),
 291    MessagesEdited,
 292    SummaryChanged,
 293    StreamedCompletion,
 294    WorkflowStepsUpdated {
 295        removed: Vec<Range<language::Anchor>>,
 296        updated: Vec<Range<language::Anchor>>,
 297    },
 298    PendingSlashCommandsUpdated {
 299        removed: Vec<Range<language::Anchor>>,
 300        updated: Vec<PendingSlashCommand>,
 301    },
 302    SlashCommandFinished {
 303        output_range: Range<language::Anchor>,
 304        sections: Vec<SlashCommandOutputSection<language::Anchor>>,
 305        run_commands_in_output: bool,
 306        expand_result: bool,
 307    },
 308    UsePendingTools,
 309    ToolFinished {
 310        tool_use_id: Arc<str>,
 311        output_range: Range<language::Anchor>,
 312    },
 313    Operation(ContextOperation),
 314}
 315
 316#[derive(Clone, Default, Debug)]
 317pub struct ContextSummary {
 318    pub text: String,
 319    done: bool,
 320    timestamp: clock::Lamport,
 321}
 322
 323#[derive(Clone, Debug, Eq, PartialEq)]
 324pub struct MessageAnchor {
 325    pub id: MessageId,
 326    pub start: language::Anchor,
 327}
 328
 329#[derive(Clone, Debug, Eq, PartialEq)]
 330pub enum CacheStatus {
 331    Pending,
 332    Cached,
 333}
 334
 335#[derive(Clone, Debug, Eq, PartialEq)]
 336pub struct MessageCacheMetadata {
 337    pub is_anchor: bool,
 338    pub is_final_anchor: bool,
 339    pub status: CacheStatus,
 340    pub cached_at: clock::Global,
 341}
 342
 343#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
 344pub struct MessageMetadata {
 345    pub role: Role,
 346    pub status: MessageStatus,
 347    pub(crate) timestamp: clock::Lamport,
 348    #[serde(skip)]
 349    pub cache: Option<MessageCacheMetadata>,
 350}
 351
 352impl From<&Message> for MessageMetadata {
 353    fn from(message: &Message) -> Self {
 354        Self {
 355            role: message.role,
 356            status: message.status.clone(),
 357            timestamp: message.id.0,
 358            cache: message.cache.clone(),
 359        }
 360    }
 361}
 362
 363impl MessageMetadata {
 364    pub fn is_cache_valid(&self, buffer: &BufferSnapshot, range: &Range<usize>) -> bool {
 365        let result = match &self.cache {
 366            Some(MessageCacheMetadata { cached_at, .. }) => !buffer.has_edits_since_in_range(
 367                &cached_at,
 368                Range {
 369                    start: buffer.anchor_at(range.start, Bias::Right),
 370                    end: buffer.anchor_at(range.end, Bias::Left),
 371                },
 372            ),
 373            _ => false,
 374        };
 375        result
 376    }
 377}
 378
 379#[derive(Clone, Debug)]
 380pub struct Message {
 381    pub offset_range: Range<usize>,
 382    pub index_range: Range<usize>,
 383    pub anchor_range: Range<language::Anchor>,
 384    pub id: MessageId,
 385    pub role: Role,
 386    pub status: MessageStatus,
 387    pub cache: Option<MessageCacheMetadata>,
 388}
 389
 390#[derive(Debug, Clone)]
 391pub enum Content {
 392    Image {
 393        anchor: language::Anchor,
 394        image_id: u64,
 395        render_image: Arc<RenderImage>,
 396        image: Shared<Task<Option<LanguageModelImage>>>,
 397    },
 398    ToolUse {
 399        range: Range<language::Anchor>,
 400        tool_use: LanguageModelToolUse,
 401    },
 402    ToolResult {
 403        range: Range<language::Anchor>,
 404        tool_use_id: Arc<str>,
 405    },
 406}
 407
 408impl Content {
 409    fn range(&self) -> Range<language::Anchor> {
 410        match self {
 411            Self::Image { anchor, .. } => *anchor..*anchor,
 412            Self::ToolUse { range, .. } | Self::ToolResult { range, .. } => range.clone(),
 413        }
 414    }
 415
 416    fn cmp(&self, other: &Self, buffer: &BufferSnapshot) -> Ordering {
 417        let self_range = self.range();
 418        let other_range = other.range();
 419        if self_range.end.cmp(&other_range.start, buffer).is_lt() {
 420            Ordering::Less
 421        } else if self_range.start.cmp(&other_range.end, buffer).is_gt() {
 422            Ordering::Greater
 423        } else {
 424            Ordering::Equal
 425        }
 426    }
 427}
 428
 429struct PendingCompletion {
 430    id: usize,
 431    assistant_message_id: MessageId,
 432    _task: Task<()>,
 433}
 434
 435#[derive(Copy, Clone, Debug, Hash, Eq, PartialEq)]
 436pub struct SlashCommandId(clock::Lamport);
 437
 438#[derive(Clone, Debug)]
 439pub struct XmlTag {
 440    pub kind: XmlTagKind,
 441    pub range: Range<text::Anchor>,
 442    pub is_open_tag: bool,
 443}
 444
 445#[derive(Copy, Clone, Debug, strum::EnumString, PartialEq, Eq, strum::AsRefStr)]
 446#[strum(serialize_all = "snake_case")]
 447pub enum XmlTagKind {
 448    Step,
 449    Edit,
 450    Path,
 451    Search,
 452    Within,
 453    Operation,
 454    Description,
 455}
 456
 457pub struct Context {
 458    id: ContextId,
 459    timestamp: clock::Lamport,
 460    version: clock::Global,
 461    pending_ops: Vec<ContextOperation>,
 462    operations: Vec<ContextOperation>,
 463    buffer: Model<Buffer>,
 464    pending_slash_commands: Vec<PendingSlashCommand>,
 465    edits_since_last_parse: language::Subscription,
 466    finished_slash_commands: HashSet<SlashCommandId>,
 467    slash_command_output_sections: Vec<SlashCommandOutputSection<language::Anchor>>,
 468    pending_tool_uses_by_id: HashMap<Arc<str>, PendingToolUse>,
 469    message_anchors: Vec<MessageAnchor>,
 470    contents: Vec<Content>,
 471    messages_metadata: HashMap<MessageId, MessageMetadata>,
 472    summary: Option<ContextSummary>,
 473    pending_summary: Task<Option<()>>,
 474    completion_count: usize,
 475    pending_completions: Vec<PendingCompletion>,
 476    token_count: Option<usize>,
 477    pending_token_count: Task<Option<()>>,
 478    pending_save: Task<Result<()>>,
 479    pending_cache_warming_task: Task<Option<()>>,
 480    path: Option<PathBuf>,
 481    _subscriptions: Vec<Subscription>,
 482    telemetry: Option<Arc<Telemetry>>,
 483    language_registry: Arc<LanguageRegistry>,
 484    workflow_steps: Vec<WorkflowStep>,
 485    xml_tags: Vec<XmlTag>,
 486    project: Option<Model<Project>>,
 487    prompt_builder: Arc<PromptBuilder>,
 488}
 489
 490trait ContextAnnotation {
 491    fn range(&self) -> &Range<language::Anchor>;
 492}
 493
 494impl ContextAnnotation for PendingSlashCommand {
 495    fn range(&self) -> &Range<language::Anchor> {
 496        &self.source_range
 497    }
 498}
 499
 500impl ContextAnnotation for WorkflowStep {
 501    fn range(&self) -> &Range<language::Anchor> {
 502        &self.range
 503    }
 504}
 505
 506impl ContextAnnotation for XmlTag {
 507    fn range(&self) -> &Range<language::Anchor> {
 508        &self.range
 509    }
 510}
 511
 512impl EventEmitter<ContextEvent> for Context {}
 513
 514impl Context {
 515    pub fn local(
 516        language_registry: Arc<LanguageRegistry>,
 517        project: Option<Model<Project>>,
 518        telemetry: Option<Arc<Telemetry>>,
 519        prompt_builder: Arc<PromptBuilder>,
 520        cx: &mut ModelContext<Self>,
 521    ) -> Self {
 522        Self::new(
 523            ContextId::new(),
 524            ReplicaId::default(),
 525            language::Capability::ReadWrite,
 526            language_registry,
 527            prompt_builder,
 528            project,
 529            telemetry,
 530            cx,
 531        )
 532    }
 533
 534    #[allow(clippy::too_many_arguments)]
 535    pub fn new(
 536        id: ContextId,
 537        replica_id: ReplicaId,
 538        capability: language::Capability,
 539        language_registry: Arc<LanguageRegistry>,
 540        prompt_builder: Arc<PromptBuilder>,
 541        project: Option<Model<Project>>,
 542        telemetry: Option<Arc<Telemetry>>,
 543        cx: &mut ModelContext<Self>,
 544    ) -> Self {
 545        let buffer = cx.new_model(|_cx| {
 546            let mut buffer = Buffer::remote(
 547                language::BufferId::new(1).unwrap(),
 548                replica_id,
 549                capability,
 550                "",
 551            );
 552            buffer.set_language_registry(language_registry.clone());
 553            buffer
 554        });
 555        let edits_since_last_slash_command_parse =
 556            buffer.update(cx, |buffer, _| buffer.subscribe());
 557        let mut this = Self {
 558            id,
 559            timestamp: clock::Lamport::new(replica_id),
 560            version: clock::Global::new(),
 561            pending_ops: Vec::new(),
 562            operations: Vec::new(),
 563            message_anchors: Default::default(),
 564            contents: Default::default(),
 565            messages_metadata: Default::default(),
 566            pending_slash_commands: Vec::new(),
 567            finished_slash_commands: HashSet::default(),
 568            pending_tool_uses_by_id: HashMap::default(),
 569            slash_command_output_sections: Vec::new(),
 570            edits_since_last_parse: edits_since_last_slash_command_parse,
 571            summary: None,
 572            pending_summary: Task::ready(None),
 573            completion_count: Default::default(),
 574            pending_completions: Default::default(),
 575            token_count: None,
 576            pending_token_count: Task::ready(None),
 577            pending_cache_warming_task: Task::ready(None),
 578            _subscriptions: vec![cx.subscribe(&buffer, Self::handle_buffer_event)],
 579            pending_save: Task::ready(Ok(())),
 580            path: None,
 581            buffer,
 582            telemetry,
 583            project,
 584            language_registry,
 585            workflow_steps: Vec::new(),
 586            xml_tags: Vec::new(),
 587            prompt_builder,
 588        };
 589
 590        let first_message_id = MessageId(clock::Lamport {
 591            replica_id: 0,
 592            value: 0,
 593        });
 594        let message = MessageAnchor {
 595            id: first_message_id,
 596            start: language::Anchor::MIN,
 597        };
 598        this.messages_metadata.insert(
 599            first_message_id,
 600            MessageMetadata {
 601                role: Role::User,
 602                status: MessageStatus::Done,
 603                timestamp: first_message_id.0,
 604                cache: None,
 605            },
 606        );
 607        this.message_anchors.push(message);
 608
 609        this.set_language(cx);
 610        this.count_remaining_tokens(cx);
 611        this
 612    }
 613
 614    pub(crate) fn serialize(&self, cx: &AppContext) -> SavedContext {
 615        let buffer = self.buffer.read(cx);
 616        SavedContext {
 617            id: Some(self.id.clone()),
 618            zed: "context".into(),
 619            version: SavedContext::VERSION.into(),
 620            text: buffer.text(),
 621            messages: self
 622                .messages(cx)
 623                .map(|message| SavedMessage {
 624                    id: message.id,
 625                    start: message.offset_range.start,
 626                    metadata: self.messages_metadata[&message.id].clone(),
 627                })
 628                .collect(),
 629            summary: self
 630                .summary
 631                .as_ref()
 632                .map(|summary| summary.text.clone())
 633                .unwrap_or_default(),
 634            slash_command_output_sections: self
 635                .slash_command_output_sections
 636                .iter()
 637                .filter_map(|section| {
 638                    let range = section.range.to_offset(buffer);
 639                    if section.range.start.is_valid(buffer) && !range.is_empty() {
 640                        Some(assistant_slash_command::SlashCommandOutputSection {
 641                            range,
 642                            icon: section.icon,
 643                            label: section.label.clone(),
 644                        })
 645                    } else {
 646                        None
 647                    }
 648                })
 649                .collect(),
 650        }
 651    }
 652
 653    #[allow(clippy::too_many_arguments)]
 654    pub fn deserialize(
 655        saved_context: SavedContext,
 656        path: PathBuf,
 657        language_registry: Arc<LanguageRegistry>,
 658        prompt_builder: Arc<PromptBuilder>,
 659        project: Option<Model<Project>>,
 660        telemetry: Option<Arc<Telemetry>>,
 661        cx: &mut ModelContext<Self>,
 662    ) -> Self {
 663        let id = saved_context.id.clone().unwrap_or_else(ContextId::new);
 664        let mut this = Self::new(
 665            id,
 666            ReplicaId::default(),
 667            language::Capability::ReadWrite,
 668            language_registry,
 669            prompt_builder,
 670            project,
 671            telemetry,
 672            cx,
 673        );
 674        this.path = Some(path);
 675        this.buffer.update(cx, |buffer, cx| {
 676            buffer.set_text(saved_context.text.as_str(), cx)
 677        });
 678        let operations = saved_context.into_ops(&this.buffer, cx);
 679        this.apply_ops(operations, cx).unwrap();
 680        this
 681    }
 682
 683    pub fn id(&self) -> &ContextId {
 684        &self.id
 685    }
 686
 687    pub fn replica_id(&self) -> ReplicaId {
 688        self.timestamp.replica_id
 689    }
 690
 691    pub fn version(&self, cx: &AppContext) -> ContextVersion {
 692        ContextVersion {
 693            context: self.version.clone(),
 694            buffer: self.buffer.read(cx).version(),
 695        }
 696    }
 697
 698    pub fn set_capability(
 699        &mut self,
 700        capability: language::Capability,
 701        cx: &mut ModelContext<Self>,
 702    ) {
 703        self.buffer
 704            .update(cx, |buffer, cx| buffer.set_capability(capability, cx));
 705    }
 706
 707    fn next_timestamp(&mut self) -> clock::Lamport {
 708        let timestamp = self.timestamp.tick();
 709        self.version.observe(timestamp);
 710        timestamp
 711    }
 712
 713    pub fn serialize_ops(
 714        &self,
 715        since: &ContextVersion,
 716        cx: &AppContext,
 717    ) -> Task<Vec<proto::ContextOperation>> {
 718        let buffer_ops = self
 719            .buffer
 720            .read(cx)
 721            .serialize_ops(Some(since.buffer.clone()), cx);
 722
 723        let mut context_ops = self
 724            .operations
 725            .iter()
 726            .filter(|op| !since.context.observed(op.timestamp()))
 727            .cloned()
 728            .collect::<Vec<_>>();
 729        context_ops.extend(self.pending_ops.iter().cloned());
 730
 731        cx.background_executor().spawn(async move {
 732            let buffer_ops = buffer_ops.await;
 733            context_ops.sort_unstable_by_key(|op| op.timestamp());
 734            buffer_ops
 735                .into_iter()
 736                .map(|op| proto::ContextOperation {
 737                    variant: Some(proto::context_operation::Variant::BufferOperation(
 738                        proto::context_operation::BufferOperation {
 739                            operation: Some(op),
 740                        },
 741                    )),
 742                })
 743                .chain(context_ops.into_iter().map(|op| op.to_proto()))
 744                .collect()
 745        })
 746    }
 747
 748    pub fn apply_ops(
 749        &mut self,
 750        ops: impl IntoIterator<Item = ContextOperation>,
 751        cx: &mut ModelContext<Self>,
 752    ) -> Result<()> {
 753        let mut buffer_ops = Vec::new();
 754        for op in ops {
 755            match op {
 756                ContextOperation::BufferOperation(buffer_op) => buffer_ops.push(buffer_op),
 757                op @ _ => self.pending_ops.push(op),
 758            }
 759        }
 760        self.buffer
 761            .update(cx, |buffer, cx| buffer.apply_ops(buffer_ops, cx))?;
 762        self.flush_ops(cx);
 763
 764        Ok(())
 765    }
 766
 767    fn flush_ops(&mut self, cx: &mut ModelContext<Context>) {
 768        let mut changed_messages = HashSet::default();
 769        let mut summary_changed = false;
 770
 771        self.pending_ops.sort_unstable_by_key(|op| op.timestamp());
 772        for op in mem::take(&mut self.pending_ops) {
 773            if !self.can_apply_op(&op, cx) {
 774                self.pending_ops.push(op);
 775                continue;
 776            }
 777
 778            let timestamp = op.timestamp();
 779            match op.clone() {
 780                ContextOperation::InsertMessage {
 781                    anchor, metadata, ..
 782                } => {
 783                    if self.messages_metadata.contains_key(&anchor.id) {
 784                        // We already applied this operation.
 785                    } else {
 786                        changed_messages.insert(anchor.id);
 787                        self.insert_message(anchor, metadata, cx);
 788                    }
 789                }
 790                ContextOperation::UpdateMessage {
 791                    message_id,
 792                    metadata: new_metadata,
 793                    ..
 794                } => {
 795                    let metadata = self.messages_metadata.get_mut(&message_id).unwrap();
 796                    if new_metadata.timestamp > metadata.timestamp {
 797                        *metadata = new_metadata;
 798                        changed_messages.insert(message_id);
 799                    }
 800                }
 801                ContextOperation::UpdateSummary {
 802                    summary: new_summary,
 803                    ..
 804                } => {
 805                    if self
 806                        .summary
 807                        .as_ref()
 808                        .map_or(true, |summary| new_summary.timestamp > summary.timestamp)
 809                    {
 810                        self.summary = Some(new_summary);
 811                        summary_changed = true;
 812                    }
 813                }
 814                ContextOperation::SlashCommandFinished {
 815                    id,
 816                    output_range,
 817                    sections,
 818                    ..
 819                } => {
 820                    if self.finished_slash_commands.insert(id) {
 821                        let buffer = self.buffer.read(cx);
 822                        self.slash_command_output_sections
 823                            .extend(sections.iter().cloned());
 824                        self.slash_command_output_sections
 825                            .sort_by(|a, b| a.range.cmp(&b.range, buffer));
 826                        cx.emit(ContextEvent::SlashCommandFinished {
 827                            output_range,
 828                            sections,
 829                            expand_result: false,
 830                            run_commands_in_output: false,
 831                        });
 832                    }
 833                }
 834                ContextOperation::BufferOperation(_) => unreachable!(),
 835            }
 836
 837            self.version.observe(timestamp);
 838            self.timestamp.observe(timestamp);
 839            self.operations.push(op);
 840        }
 841
 842        if !changed_messages.is_empty() {
 843            self.message_roles_updated(changed_messages, cx);
 844            cx.emit(ContextEvent::MessagesEdited);
 845            cx.notify();
 846        }
 847
 848        if summary_changed {
 849            cx.emit(ContextEvent::SummaryChanged);
 850            cx.notify();
 851        }
 852    }
 853
 854    fn can_apply_op(&self, op: &ContextOperation, cx: &AppContext) -> bool {
 855        if !self.version.observed_all(op.version()) {
 856            return false;
 857        }
 858
 859        match op {
 860            ContextOperation::InsertMessage { anchor, .. } => self
 861                .buffer
 862                .read(cx)
 863                .version
 864                .observed(anchor.start.timestamp),
 865            ContextOperation::UpdateMessage { message_id, .. } => {
 866                self.messages_metadata.contains_key(message_id)
 867            }
 868            ContextOperation::UpdateSummary { .. } => true,
 869            ContextOperation::SlashCommandFinished {
 870                output_range,
 871                sections,
 872                ..
 873            } => {
 874                let version = &self.buffer.read(cx).version;
 875                sections
 876                    .iter()
 877                    .map(|section| &section.range)
 878                    .chain([output_range])
 879                    .all(|range| {
 880                        let observed_start = range.start == language::Anchor::MIN
 881                            || range.start == language::Anchor::MAX
 882                            || version.observed(range.start.timestamp);
 883                        let observed_end = range.end == language::Anchor::MIN
 884                            || range.end == language::Anchor::MAX
 885                            || version.observed(range.end.timestamp);
 886                        observed_start && observed_end
 887                    })
 888            }
 889            ContextOperation::BufferOperation(_) => {
 890                panic!("buffer operations should always be applied")
 891            }
 892        }
 893    }
 894
 895    fn push_op(&mut self, op: ContextOperation, cx: &mut ModelContext<Self>) {
 896        self.operations.push(op.clone());
 897        cx.emit(ContextEvent::Operation(op));
 898    }
 899
 900    pub fn buffer(&self) -> &Model<Buffer> {
 901        &self.buffer
 902    }
 903
 904    pub fn language_registry(&self) -> Arc<LanguageRegistry> {
 905        self.language_registry.clone()
 906    }
 907
 908    pub fn project(&self) -> Option<Model<Project>> {
 909        self.project.clone()
 910    }
 911
 912    pub fn prompt_builder(&self) -> Arc<PromptBuilder> {
 913        self.prompt_builder.clone()
 914    }
 915
 916    pub fn path(&self) -> Option<&Path> {
 917        self.path.as_deref()
 918    }
 919
 920    pub fn summary(&self) -> Option<&ContextSummary> {
 921        self.summary.as_ref()
 922    }
 923
 924    pub(crate) fn workflow_step_containing(
 925        &self,
 926        offset: usize,
 927        cx: &AppContext,
 928    ) -> Option<&WorkflowStep> {
 929        let buffer = self.buffer.read(cx);
 930        let index = self
 931            .workflow_steps
 932            .binary_search_by(|step| {
 933                let step_range = step.range.to_offset(&buffer);
 934                if offset < step_range.start {
 935                    Ordering::Greater
 936                } else if offset > step_range.end {
 937                    Ordering::Less
 938                } else {
 939                    Ordering::Equal
 940                }
 941            })
 942            .ok()?;
 943        Some(&self.workflow_steps[index])
 944    }
 945
 946    pub fn workflow_step_ranges(&self) -> impl Iterator<Item = Range<language::Anchor>> + '_ {
 947        self.workflow_steps.iter().map(|step| step.range.clone())
 948    }
 949
 950    pub(crate) fn workflow_step_for_range(
 951        &self,
 952        range: &Range<language::Anchor>,
 953        cx: &AppContext,
 954    ) -> Option<&WorkflowStep> {
 955        let buffer = self.buffer.read(cx);
 956        let index = self.workflow_step_index_for_range(range, buffer).ok()?;
 957        Some(&self.workflow_steps[index])
 958    }
 959
 960    fn workflow_step_index_for_range(
 961        &self,
 962        tagged_range: &Range<text::Anchor>,
 963        buffer: &text::BufferSnapshot,
 964    ) -> Result<usize, usize> {
 965        self.workflow_steps
 966            .binary_search_by(|probe| probe.range.cmp(&tagged_range, buffer))
 967    }
 968
 969    pub fn pending_slash_commands(&self) -> &[PendingSlashCommand] {
 970        &self.pending_slash_commands
 971    }
 972
 973    pub fn slash_command_output_sections(&self) -> &[SlashCommandOutputSection<language::Anchor>] {
 974        &self.slash_command_output_sections
 975    }
 976
 977    pub fn pending_tool_uses(&self) -> Vec<&PendingToolUse> {
 978        self.pending_tool_uses_by_id.values().collect()
 979    }
 980
 981    pub fn get_tool_use_by_id(&self, id: &Arc<str>) -> Option<&PendingToolUse> {
 982        self.pending_tool_uses_by_id.get(id)
 983    }
 984
 985    fn set_language(&mut self, cx: &mut ModelContext<Self>) {
 986        let markdown = self.language_registry.language_for_name("Markdown");
 987        cx.spawn(|this, mut cx| async move {
 988            let markdown = markdown.await?;
 989            this.update(&mut cx, |this, cx| {
 990                this.buffer
 991                    .update(cx, |buffer, cx| buffer.set_language(Some(markdown), cx));
 992            })
 993        })
 994        .detach_and_log_err(cx);
 995    }
 996
 997    fn handle_buffer_event(
 998        &mut self,
 999        _: Model<Buffer>,
1000        event: &language::Event,
1001        cx: &mut ModelContext<Self>,
1002    ) {
1003        match event {
1004            language::Event::Operation(operation) => cx.emit(ContextEvent::Operation(
1005                ContextOperation::BufferOperation(operation.clone()),
1006            )),
1007            language::Event::Edited => {
1008                self.count_remaining_tokens(cx);
1009                self.reparse(cx);
1010                // Use `inclusive = true` to invalidate a step when an edit occurs
1011                // at the start/end of a parsed step.
1012                cx.emit(ContextEvent::MessagesEdited);
1013            }
1014            _ => {}
1015        }
1016    }
1017
1018    pub(crate) fn token_count(&self) -> Option<usize> {
1019        self.token_count
1020    }
1021
1022    pub(crate) fn count_remaining_tokens(&mut self, cx: &mut ModelContext<Self>) {
1023        let request = self.to_completion_request(cx);
1024        let Some(model) = LanguageModelRegistry::read_global(cx).active_model() else {
1025            return;
1026        };
1027        self.pending_token_count = cx.spawn(|this, mut cx| {
1028            async move {
1029                cx.background_executor()
1030                    .timer(Duration::from_millis(200))
1031                    .await;
1032
1033                let token_count = cx.update(|cx| model.count_tokens(request, cx))?.await?;
1034                this.update(&mut cx, |this, cx| {
1035                    this.token_count = Some(token_count);
1036                    this.start_cache_warming(&model, cx);
1037                    cx.notify()
1038                })
1039            }
1040            .log_err()
1041        });
1042    }
1043
1044    pub fn mark_cache_anchors(
1045        &mut self,
1046        cache_configuration: &Option<LanguageModelCacheConfiguration>,
1047        speculative: bool,
1048        cx: &mut ModelContext<Self>,
1049    ) -> bool {
1050        let cache_configuration =
1051            cache_configuration
1052                .as_ref()
1053                .unwrap_or(&LanguageModelCacheConfiguration {
1054                    max_cache_anchors: 0,
1055                    should_speculate: false,
1056                    min_total_token: 0,
1057                });
1058
1059        let messages: Vec<Message> = self.messages(cx).collect();
1060
1061        let mut sorted_messages = messages.clone();
1062        if speculative {
1063            // Avoid caching the last message if this is a speculative cache fetch as
1064            // it's likely to change.
1065            sorted_messages.pop();
1066        }
1067        sorted_messages.retain(|m| m.role == Role::User);
1068        sorted_messages.sort_by(|a, b| b.offset_range.len().cmp(&a.offset_range.len()));
1069
1070        let cache_anchors = if self.token_count.unwrap_or(0) < cache_configuration.min_total_token {
1071            // If we have't hit the minimum threshold to enable caching, don't cache anything.
1072            0
1073        } else {
1074            // Save 1 anchor for the inline assistant to use.
1075            max(cache_configuration.max_cache_anchors, 1) - 1
1076        };
1077        sorted_messages.truncate(cache_anchors);
1078
1079        let anchors: HashSet<MessageId> = sorted_messages
1080            .into_iter()
1081            .map(|message| message.id)
1082            .collect();
1083
1084        let buffer = self.buffer.read(cx).snapshot();
1085        let invalidated_caches: HashSet<MessageId> = messages
1086            .iter()
1087            .scan(false, |encountered_invalid, message| {
1088                let message_id = message.id;
1089                let is_invalid = self
1090                    .messages_metadata
1091                    .get(&message_id)
1092                    .map_or(true, |metadata| {
1093                        !metadata.is_cache_valid(&buffer, &message.offset_range)
1094                            || *encountered_invalid
1095                    });
1096                *encountered_invalid |= is_invalid;
1097                Some(if is_invalid { Some(message_id) } else { None })
1098            })
1099            .flatten()
1100            .collect();
1101
1102        let last_anchor = messages.iter().rev().find_map(|message| {
1103            if anchors.contains(&message.id) {
1104                Some(message.id)
1105            } else {
1106                None
1107            }
1108        });
1109
1110        let mut new_anchor_needs_caching = false;
1111        let current_version = &buffer.version;
1112        // If we have no anchors, mark all messages as not being cached.
1113        let mut hit_last_anchor = last_anchor.is_none();
1114
1115        for message in messages.iter() {
1116            if hit_last_anchor {
1117                self.update_metadata(message.id, cx, |metadata| metadata.cache = None);
1118                continue;
1119            }
1120
1121            if let Some(last_anchor) = last_anchor {
1122                if message.id == last_anchor {
1123                    hit_last_anchor = true;
1124                }
1125            }
1126
1127            new_anchor_needs_caching = new_anchor_needs_caching
1128                || (invalidated_caches.contains(&message.id) && anchors.contains(&message.id));
1129
1130            self.update_metadata(message.id, cx, |metadata| {
1131                let cache_status = if invalidated_caches.contains(&message.id) {
1132                    CacheStatus::Pending
1133                } else {
1134                    metadata
1135                        .cache
1136                        .as_ref()
1137                        .map_or(CacheStatus::Pending, |cm| cm.status.clone())
1138                };
1139                metadata.cache = Some(MessageCacheMetadata {
1140                    is_anchor: anchors.contains(&message.id),
1141                    is_final_anchor: hit_last_anchor,
1142                    status: cache_status,
1143                    cached_at: current_version.clone(),
1144                });
1145            });
1146        }
1147        new_anchor_needs_caching
1148    }
1149
1150    fn start_cache_warming(&mut self, model: &Arc<dyn LanguageModel>, cx: &mut ModelContext<Self>) {
1151        let cache_configuration = model.cache_configuration();
1152
1153        if !self.mark_cache_anchors(&cache_configuration, true, cx) {
1154            return;
1155        }
1156        if !self.pending_completions.is_empty() {
1157            return;
1158        }
1159        if let Some(cache_configuration) = cache_configuration {
1160            if !cache_configuration.should_speculate {
1161                return;
1162            }
1163        }
1164
1165        let request = {
1166            let mut req = self.to_completion_request(cx);
1167            // Skip the last message because it's likely to change and
1168            // therefore would be a waste to cache.
1169            req.messages.pop();
1170            req.messages.push(LanguageModelRequestMessage {
1171                role: Role::User,
1172                content: vec!["Respond only with OK, nothing else.".into()],
1173                cache: false,
1174            });
1175            req
1176        };
1177
1178        let model = Arc::clone(model);
1179        self.pending_cache_warming_task = cx.spawn(|this, mut cx| {
1180            async move {
1181                match model.stream_completion(request, &cx).await {
1182                    Ok(mut stream) => {
1183                        stream.next().await;
1184                        log::info!("Cache warming completed successfully");
1185                    }
1186                    Err(e) => {
1187                        log::warn!("Cache warming failed: {}", e);
1188                    }
1189                };
1190                this.update(&mut cx, |this, cx| {
1191                    this.update_cache_status_for_completion(cx);
1192                })
1193                .ok();
1194                anyhow::Ok(())
1195            }
1196            .log_err()
1197        });
1198    }
1199
1200    pub fn update_cache_status_for_completion(&mut self, cx: &mut ModelContext<Self>) {
1201        let cached_message_ids: Vec<MessageId> = self
1202            .messages_metadata
1203            .iter()
1204            .filter_map(|(message_id, metadata)| {
1205                metadata.cache.as_ref().and_then(|cache| {
1206                    if cache.status == CacheStatus::Pending {
1207                        Some(*message_id)
1208                    } else {
1209                        None
1210                    }
1211                })
1212            })
1213            .collect();
1214
1215        for message_id in cached_message_ids {
1216            self.update_metadata(message_id, cx, |metadata| {
1217                if let Some(cache) = &mut metadata.cache {
1218                    cache.status = CacheStatus::Cached;
1219                }
1220            });
1221        }
1222        cx.notify();
1223    }
1224
1225    pub fn reparse(&mut self, cx: &mut ModelContext<Self>) {
1226        let buffer = self.buffer.read(cx).text_snapshot();
1227        let mut row_ranges = self
1228            .edits_since_last_parse
1229            .consume()
1230            .into_iter()
1231            .map(|edit| {
1232                let start_row = buffer.offset_to_point(edit.new.start).row;
1233                let end_row = buffer.offset_to_point(edit.new.end).row + 1;
1234                start_row..end_row
1235            })
1236            .peekable();
1237
1238        let mut removed_slash_command_ranges = Vec::new();
1239        let mut updated_slash_commands = Vec::new();
1240        let mut removed_steps = Vec::new();
1241        let mut updated_steps = Vec::new();
1242        while let Some(mut row_range) = row_ranges.next() {
1243            while let Some(next_row_range) = row_ranges.peek() {
1244                if row_range.end >= next_row_range.start {
1245                    row_range.end = next_row_range.end;
1246                    row_ranges.next();
1247                } else {
1248                    break;
1249                }
1250            }
1251
1252            let start = buffer.anchor_before(Point::new(row_range.start, 0));
1253            let end = buffer.anchor_after(Point::new(
1254                row_range.end - 1,
1255                buffer.line_len(row_range.end - 1),
1256            ));
1257
1258            self.reparse_slash_commands_in_range(
1259                start..end,
1260                &buffer,
1261                &mut updated_slash_commands,
1262                &mut removed_slash_command_ranges,
1263                cx,
1264            );
1265            self.reparse_workflow_steps_in_range(
1266                start..end,
1267                &buffer,
1268                &mut updated_steps,
1269                &mut removed_steps,
1270                cx,
1271            );
1272        }
1273
1274        if !updated_slash_commands.is_empty() || !removed_slash_command_ranges.is_empty() {
1275            cx.emit(ContextEvent::PendingSlashCommandsUpdated {
1276                removed: removed_slash_command_ranges,
1277                updated: updated_slash_commands,
1278            });
1279        }
1280
1281        if !updated_steps.is_empty() || !removed_steps.is_empty() {
1282            cx.emit(ContextEvent::WorkflowStepsUpdated {
1283                removed: removed_steps,
1284                updated: updated_steps,
1285            });
1286        }
1287    }
1288
1289    fn reparse_slash_commands_in_range(
1290        &mut self,
1291        range: Range<text::Anchor>,
1292        buffer: &BufferSnapshot,
1293        updated: &mut Vec<PendingSlashCommand>,
1294        removed: &mut Vec<Range<text::Anchor>>,
1295        cx: &AppContext,
1296    ) {
1297        let old_range = self.pending_command_indices_for_range(range.clone(), cx);
1298
1299        let mut new_commands = Vec::new();
1300        let mut lines = buffer.text_for_range(range).lines();
1301        let mut offset = lines.offset();
1302        while let Some(line) = lines.next() {
1303            if let Some(command_line) = SlashCommandLine::parse(line) {
1304                let name = &line[command_line.name.clone()];
1305                let arguments = command_line
1306                    .arguments
1307                    .iter()
1308                    .filter_map(|argument_range| {
1309                        if argument_range.is_empty() {
1310                            None
1311                        } else {
1312                            line.get(argument_range.clone())
1313                        }
1314                    })
1315                    .map(ToOwned::to_owned)
1316                    .collect::<SmallVec<_>>();
1317                if let Some(command) = SlashCommandRegistry::global(cx).command(name) {
1318                    if !command.requires_argument() || !arguments.is_empty() {
1319                        let start_ix = offset + command_line.name.start - 1;
1320                        let end_ix = offset
1321                            + command_line
1322                                .arguments
1323                                .last()
1324                                .map_or(command_line.name.end, |argument| argument.end);
1325                        let source_range =
1326                            buffer.anchor_after(start_ix)..buffer.anchor_after(end_ix);
1327                        let pending_command = PendingSlashCommand {
1328                            name: name.to_string(),
1329                            arguments,
1330                            source_range,
1331                            status: PendingSlashCommandStatus::Idle,
1332                        };
1333                        updated.push(pending_command.clone());
1334                        new_commands.push(pending_command);
1335                    }
1336                }
1337            }
1338
1339            offset = lines.offset();
1340        }
1341
1342        let removed_commands = self.pending_slash_commands.splice(old_range, new_commands);
1343        removed.extend(removed_commands.map(|command| command.source_range));
1344    }
1345
1346    fn reparse_workflow_steps_in_range(
1347        &mut self,
1348        range: Range<text::Anchor>,
1349        buffer: &BufferSnapshot,
1350        updated: &mut Vec<Range<text::Anchor>>,
1351        removed: &mut Vec<Range<text::Anchor>>,
1352        cx: &mut ModelContext<Self>,
1353    ) {
1354        // Rebuild the XML tags in the edited range.
1355        let intersecting_tags_range =
1356            self.indices_intersecting_buffer_range(&self.xml_tags, range.clone(), cx);
1357        let new_tags = self.parse_xml_tags_in_range(buffer, range.clone(), cx);
1358        self.xml_tags
1359            .splice(intersecting_tags_range.clone(), new_tags);
1360
1361        // Find which steps intersect the changed range.
1362        let intersecting_steps_range =
1363            self.indices_intersecting_buffer_range(&self.workflow_steps, range.clone(), cx);
1364
1365        // Reparse all tags after the last unchanged step before the change.
1366        let mut tags_start_ix = 0;
1367        if let Some(preceding_unchanged_step) =
1368            self.workflow_steps[..intersecting_steps_range.start].last()
1369        {
1370            tags_start_ix = match self.xml_tags.binary_search_by(|tag| {
1371                tag.range
1372                    .start
1373                    .cmp(&preceding_unchanged_step.range.end, buffer)
1374                    .then(Ordering::Less)
1375            }) {
1376                Ok(ix) | Err(ix) => ix,
1377            };
1378        }
1379
1380        // Rebuild the edit suggestions in the range.
1381        let mut new_steps = self.parse_steps(tags_start_ix, range.end, buffer);
1382
1383        if let Some(project) = self.project() {
1384            for step in &mut new_steps {
1385                Self::resolve_workflow_step_internal(step, &project, cx);
1386            }
1387        }
1388
1389        updated.extend(new_steps.iter().map(|step| step.range.clone()));
1390        let removed_steps = self
1391            .workflow_steps
1392            .splice(intersecting_steps_range, new_steps);
1393        removed.extend(
1394            removed_steps
1395                .map(|step| step.range)
1396                .filter(|range| !updated.contains(&range)),
1397        );
1398    }
1399
1400    fn parse_xml_tags_in_range(
1401        &self,
1402        buffer: &BufferSnapshot,
1403        range: Range<text::Anchor>,
1404        cx: &AppContext,
1405    ) -> Vec<XmlTag> {
1406        let mut messages = self.messages(cx).peekable();
1407
1408        let mut tags = Vec::new();
1409        let mut lines = buffer.text_for_range(range).lines();
1410        let mut offset = lines.offset();
1411
1412        while let Some(line) = lines.next() {
1413            while let Some(message) = messages.peek() {
1414                if offset < message.offset_range.end {
1415                    break;
1416                } else {
1417                    messages.next();
1418                }
1419            }
1420
1421            let is_assistant_message = messages
1422                .peek()
1423                .map_or(false, |message| message.role == Role::Assistant);
1424            if is_assistant_message {
1425                for (start_ix, _) in line.match_indices('<') {
1426                    let mut name_start_ix = start_ix + 1;
1427                    let closing_bracket_ix = line[start_ix..].find('>').map(|i| start_ix + i);
1428                    if let Some(closing_bracket_ix) = closing_bracket_ix {
1429                        let end_ix = closing_bracket_ix + 1;
1430                        let mut is_open_tag = true;
1431                        if line[name_start_ix..closing_bracket_ix].starts_with('/') {
1432                            name_start_ix += 1;
1433                            is_open_tag = false;
1434                        }
1435                        let tag_inner = &line[name_start_ix..closing_bracket_ix];
1436                        let tag_name_len = tag_inner
1437                            .find(|c: char| c.is_whitespace())
1438                            .unwrap_or(tag_inner.len());
1439                        if let Ok(kind) = XmlTagKind::from_str(&tag_inner[..tag_name_len]) {
1440                            tags.push(XmlTag {
1441                                range: buffer.anchor_after(offset + start_ix)
1442                                    ..buffer.anchor_before(offset + end_ix),
1443                                is_open_tag,
1444                                kind,
1445                            });
1446                        };
1447                    }
1448                }
1449            }
1450
1451            offset = lines.offset();
1452        }
1453        tags
1454    }
1455
1456    fn parse_steps(
1457        &mut self,
1458        tags_start_ix: usize,
1459        buffer_end: text::Anchor,
1460        buffer: &BufferSnapshot,
1461    ) -> Vec<WorkflowStep> {
1462        let mut new_steps = Vec::new();
1463        let mut pending_step = None;
1464        let mut edit_step_depth = 0;
1465        let mut tags = self.xml_tags[tags_start_ix..].iter().peekable();
1466        'tags: while let Some(tag) = tags.next() {
1467            if tag.range.start.cmp(&buffer_end, buffer).is_gt() && edit_step_depth == 0 {
1468                break;
1469            }
1470
1471            if tag.kind == XmlTagKind::Step && tag.is_open_tag {
1472                edit_step_depth += 1;
1473                let edit_start = tag.range.start;
1474                let mut edits = Vec::new();
1475                let mut step = WorkflowStep {
1476                    range: edit_start..edit_start,
1477                    leading_tags_end: tag.range.end,
1478                    trailing_tag_start: None,
1479                    edits: Default::default(),
1480                    resolution: None,
1481                    resolution_task: None,
1482                };
1483
1484                while let Some(tag) = tags.next() {
1485                    step.trailing_tag_start.get_or_insert(tag.range.start);
1486
1487                    if tag.kind == XmlTagKind::Step && !tag.is_open_tag {
1488                        // step.trailing_tag_start = Some(tag.range.start);
1489                        edit_step_depth -= 1;
1490                        if edit_step_depth == 0 {
1491                            step.range.end = tag.range.end;
1492                            step.edits = edits.into();
1493                            new_steps.push(step);
1494                            continue 'tags;
1495                        }
1496                    }
1497
1498                    if tag.kind == XmlTagKind::Edit && tag.is_open_tag {
1499                        let mut path = None;
1500                        let mut search = None;
1501                        let mut operation = None;
1502                        let mut description = None;
1503
1504                        while let Some(tag) = tags.next() {
1505                            if tag.kind == XmlTagKind::Edit && !tag.is_open_tag {
1506                                edits.push(WorkflowStepEdit::new(
1507                                    path,
1508                                    operation,
1509                                    search,
1510                                    description,
1511                                ));
1512                                break;
1513                            }
1514
1515                            if tag.is_open_tag
1516                                && [
1517                                    XmlTagKind::Path,
1518                                    XmlTagKind::Search,
1519                                    XmlTagKind::Operation,
1520                                    XmlTagKind::Description,
1521                                ]
1522                                .contains(&tag.kind)
1523                            {
1524                                let kind = tag.kind;
1525                                let content_start = tag.range.end;
1526                                if let Some(tag) = tags.peek() {
1527                                    if tag.kind == kind && !tag.is_open_tag {
1528                                        let tag = tags.next().unwrap();
1529                                        let content_end = tag.range.start;
1530                                        let mut content = buffer
1531                                            .text_for_range(content_start..content_end)
1532                                            .collect::<String>();
1533                                        content.truncate(content.trim_end().len());
1534                                        match kind {
1535                                            XmlTagKind::Path => path = Some(content),
1536                                            XmlTagKind::Operation => operation = Some(content),
1537                                            XmlTagKind::Search => {
1538                                                search = Some(content).filter(|s| !s.is_empty())
1539                                            }
1540                                            XmlTagKind::Description => {
1541                                                description =
1542                                                    Some(content).filter(|s| !s.is_empty())
1543                                            }
1544                                            _ => {}
1545                                        }
1546                                    }
1547                                }
1548                            }
1549                        }
1550                    }
1551                }
1552
1553                pending_step = Some(step);
1554            }
1555        }
1556
1557        if let Some(mut pending_step) = pending_step {
1558            pending_step.range.end = text::Anchor::MAX;
1559            new_steps.push(pending_step);
1560        }
1561
1562        new_steps
1563    }
1564
1565    pub fn resolve_workflow_step(
1566        &mut self,
1567        tagged_range: Range<text::Anchor>,
1568        cx: &mut ModelContext<Self>,
1569    ) -> Option<()> {
1570        let index = self
1571            .workflow_step_index_for_range(&tagged_range, self.buffer.read(cx))
1572            .ok()?;
1573        let step = &mut self.workflow_steps[index];
1574        let project = self.project.as_ref()?;
1575        step.resolution.take();
1576        Self::resolve_workflow_step_internal(step, project, cx);
1577        None
1578    }
1579
1580    fn resolve_workflow_step_internal(
1581        step: &mut WorkflowStep,
1582        project: &Model<Project>,
1583        cx: &mut ModelContext<'_, Context>,
1584    ) {
1585        step.resolution_task = Some(cx.spawn({
1586            let range = step.range.clone();
1587            let edits = step.edits.clone();
1588            let project = project.clone();
1589            |this, mut cx| async move {
1590                let suggestion_groups =
1591                    Self::compute_step_resolution(project, edits, &mut cx).await;
1592
1593                this.update(&mut cx, |this, cx| {
1594                    let buffer = this.buffer.read(cx).text_snapshot();
1595                    let ix = this.workflow_step_index_for_range(&range, &buffer).ok();
1596                    if let Some(ix) = ix {
1597                        let step = &mut this.workflow_steps[ix];
1598
1599                        let resolution = suggestion_groups.map(|suggestion_groups| {
1600                            let mut title = String::new();
1601                            for mut chunk in buffer.text_for_range(
1602                                step.leading_tags_end
1603                                    ..step.trailing_tag_start.unwrap_or(step.range.end),
1604                            ) {
1605                                if title.is_empty() {
1606                                    chunk = chunk.trim_start();
1607                                }
1608                                if let Some((prefix, _)) = chunk.split_once('\n') {
1609                                    title.push_str(prefix);
1610                                    break;
1611                                } else {
1612                                    title.push_str(chunk);
1613                                }
1614                            }
1615
1616                            WorkflowStepResolution {
1617                                title,
1618                                suggestion_groups,
1619                            }
1620                        });
1621
1622                        step.resolution = Some(Arc::new(resolution));
1623                        cx.emit(ContextEvent::WorkflowStepsUpdated {
1624                            removed: vec![],
1625                            updated: vec![range],
1626                        })
1627                    }
1628                })
1629                .ok();
1630            }
1631        }));
1632    }
1633
1634    async fn compute_step_resolution(
1635        project: Model<Project>,
1636        edits: Arc<[Result<WorkflowStepEdit>]>,
1637        cx: &mut AsyncAppContext,
1638    ) -> Result<HashMap<Model<Buffer>, Vec<WorkflowSuggestionGroup>>> {
1639        let mut suggestion_tasks = Vec::new();
1640        for edit in edits.iter() {
1641            let edit = edit.as_ref().map_err(|e| anyhow!("{e}"))?;
1642            suggestion_tasks.push(edit.resolve(project.clone(), cx.clone()));
1643        }
1644
1645        // Expand the context ranges of each suggestion and group suggestions with overlapping context ranges.
1646        let suggestions = future::try_join_all(suggestion_tasks).await?;
1647
1648        let mut suggestions_by_buffer = HashMap::default();
1649        for (buffer, suggestion) in suggestions {
1650            suggestions_by_buffer
1651                .entry(buffer)
1652                .or_insert_with(Vec::new)
1653                .push(suggestion);
1654        }
1655
1656        let mut suggestion_groups_by_buffer = HashMap::default();
1657        for (buffer, mut suggestions) in suggestions_by_buffer {
1658            let mut suggestion_groups = Vec::<WorkflowSuggestionGroup>::new();
1659            let snapshot = buffer.update(cx, |buffer, _| buffer.snapshot())?;
1660            // Sort suggestions by their range so that earlier, larger ranges come first
1661            suggestions.sort_by(|a, b| a.range().cmp(&b.range(), &snapshot));
1662
1663            // Merge overlapping suggestions
1664            suggestions.dedup_by(|a, b| b.try_merge(a, &snapshot));
1665
1666            // Create context ranges for each suggestion
1667            for suggestion in suggestions {
1668                let context_range = {
1669                    let suggestion_point_range = suggestion.range().to_point(&snapshot);
1670                    let start_row = suggestion_point_range.start.row.saturating_sub(5);
1671                    let end_row =
1672                        cmp::min(suggestion_point_range.end.row + 5, snapshot.max_point().row);
1673                    let start = snapshot.anchor_before(Point::new(start_row, 0));
1674                    let end =
1675                        snapshot.anchor_after(Point::new(end_row, snapshot.line_len(end_row)));
1676                    start..end
1677                };
1678
1679                if let Some(last_group) = suggestion_groups.last_mut() {
1680                    if last_group
1681                        .context_range
1682                        .end
1683                        .cmp(&context_range.start, &snapshot)
1684                        .is_ge()
1685                    {
1686                        // Merge with the previous group if context ranges overlap
1687                        last_group.context_range.end = context_range.end;
1688                        last_group.suggestions.push(suggestion);
1689                    } else {
1690                        // Create a new group
1691                        suggestion_groups.push(WorkflowSuggestionGroup {
1692                            context_range,
1693                            suggestions: vec![suggestion],
1694                        });
1695                    }
1696                } else {
1697                    // Create the first group
1698                    suggestion_groups.push(WorkflowSuggestionGroup {
1699                        context_range,
1700                        suggestions: vec![suggestion],
1701                    });
1702                }
1703            }
1704
1705            suggestion_groups_by_buffer.insert(buffer, suggestion_groups);
1706        }
1707
1708        Ok(suggestion_groups_by_buffer)
1709    }
1710
1711    pub fn pending_command_for_position(
1712        &mut self,
1713        position: language::Anchor,
1714        cx: &mut ModelContext<Self>,
1715    ) -> Option<&mut PendingSlashCommand> {
1716        let buffer = self.buffer.read(cx);
1717        match self
1718            .pending_slash_commands
1719            .binary_search_by(|probe| probe.source_range.end.cmp(&position, buffer))
1720        {
1721            Ok(ix) => Some(&mut self.pending_slash_commands[ix]),
1722            Err(ix) => {
1723                let cmd = self.pending_slash_commands.get_mut(ix)?;
1724                if position.cmp(&cmd.source_range.start, buffer).is_ge()
1725                    && position.cmp(&cmd.source_range.end, buffer).is_le()
1726                {
1727                    Some(cmd)
1728                } else {
1729                    None
1730                }
1731            }
1732        }
1733    }
1734
1735    pub fn pending_commands_for_range(
1736        &self,
1737        range: Range<language::Anchor>,
1738        cx: &AppContext,
1739    ) -> &[PendingSlashCommand] {
1740        let range = self.pending_command_indices_for_range(range, cx);
1741        &self.pending_slash_commands[range]
1742    }
1743
1744    fn pending_command_indices_for_range(
1745        &self,
1746        range: Range<language::Anchor>,
1747        cx: &AppContext,
1748    ) -> Range<usize> {
1749        self.indices_intersecting_buffer_range(&self.pending_slash_commands, range, cx)
1750    }
1751
1752    fn indices_intersecting_buffer_range<T: ContextAnnotation>(
1753        &self,
1754        all_annotations: &[T],
1755        range: Range<language::Anchor>,
1756        cx: &AppContext,
1757    ) -> Range<usize> {
1758        let buffer = self.buffer.read(cx);
1759        let start_ix = match all_annotations
1760            .binary_search_by(|probe| probe.range().end.cmp(&range.start, &buffer))
1761        {
1762            Ok(ix) | Err(ix) => ix,
1763        };
1764        let end_ix = match all_annotations
1765            .binary_search_by(|probe| probe.range().start.cmp(&range.end, &buffer))
1766        {
1767            Ok(ix) => ix + 1,
1768            Err(ix) => ix,
1769        };
1770        start_ix..end_ix
1771    }
1772
1773    pub fn insert_command_output(
1774        &mut self,
1775        command_range: Range<language::Anchor>,
1776        output: Task<Result<SlashCommandOutput>>,
1777        ensure_trailing_newline: bool,
1778        expand_result: bool,
1779        cx: &mut ModelContext<Self>,
1780    ) {
1781        self.reparse(cx);
1782
1783        let insert_output_task = cx.spawn(|this, mut cx| {
1784            let command_range = command_range.clone();
1785            async move {
1786                let output = output.await;
1787                this.update(&mut cx, |this, cx| match output {
1788                    Ok(mut output) => {
1789                        // Ensure section ranges are valid.
1790                        for section in &mut output.sections {
1791                            section.range.start = section.range.start.min(output.text.len());
1792                            section.range.end = section.range.end.min(output.text.len());
1793                            while !output.text.is_char_boundary(section.range.start) {
1794                                section.range.start -= 1;
1795                            }
1796                            while !output.text.is_char_boundary(section.range.end) {
1797                                section.range.end += 1;
1798                            }
1799                        }
1800
1801                        // Ensure there is a newline after the last section.
1802                        if ensure_trailing_newline {
1803                            let has_newline_after_last_section =
1804                                output.sections.last().map_or(false, |last_section| {
1805                                    output.text[last_section.range.end..].ends_with('\n')
1806                                });
1807                            if !has_newline_after_last_section {
1808                                output.text.push('\n');
1809                            }
1810                        }
1811
1812                        let version = this.version.clone();
1813                        let command_id = SlashCommandId(this.next_timestamp());
1814                        let (operation, event) = this.buffer.update(cx, |buffer, cx| {
1815                            let start = command_range.start.to_offset(buffer);
1816                            let old_end = command_range.end.to_offset(buffer);
1817                            let new_end = start + output.text.len();
1818                            buffer.edit([(start..old_end, output.text)], None, cx);
1819
1820                            let mut sections = output
1821                                .sections
1822                                .into_iter()
1823                                .map(|section| SlashCommandOutputSection {
1824                                    range: buffer.anchor_after(start + section.range.start)
1825                                        ..buffer.anchor_before(start + section.range.end),
1826                                    icon: section.icon,
1827                                    label: section.label,
1828                                })
1829                                .collect::<Vec<_>>();
1830                            sections.sort_by(|a, b| a.range.cmp(&b.range, buffer));
1831
1832                            this.slash_command_output_sections
1833                                .extend(sections.iter().cloned());
1834                            this.slash_command_output_sections
1835                                .sort_by(|a, b| a.range.cmp(&b.range, buffer));
1836
1837                            let output_range =
1838                                buffer.anchor_after(start)..buffer.anchor_before(new_end);
1839                            this.finished_slash_commands.insert(command_id);
1840
1841                            (
1842                                ContextOperation::SlashCommandFinished {
1843                                    id: command_id,
1844                                    output_range: output_range.clone(),
1845                                    sections: sections.clone(),
1846                                    version,
1847                                },
1848                                ContextEvent::SlashCommandFinished {
1849                                    output_range,
1850                                    sections,
1851                                    run_commands_in_output: output.run_commands_in_text,
1852                                    expand_result,
1853                                },
1854                            )
1855                        });
1856
1857                        this.push_op(operation, cx);
1858                        cx.emit(event);
1859                    }
1860                    Err(error) => {
1861                        if let Some(pending_command) =
1862                            this.pending_command_for_position(command_range.start, cx)
1863                        {
1864                            pending_command.status =
1865                                PendingSlashCommandStatus::Error(error.to_string());
1866                            cx.emit(ContextEvent::PendingSlashCommandsUpdated {
1867                                removed: vec![pending_command.source_range.clone()],
1868                                updated: vec![pending_command.clone()],
1869                            });
1870                        }
1871                    }
1872                })
1873                .ok();
1874            }
1875        });
1876
1877        if let Some(pending_command) = self.pending_command_for_position(command_range.start, cx) {
1878            pending_command.status = PendingSlashCommandStatus::Running {
1879                _task: insert_output_task.shared(),
1880            };
1881            cx.emit(ContextEvent::PendingSlashCommandsUpdated {
1882                removed: vec![pending_command.source_range.clone()],
1883                updated: vec![pending_command.clone()],
1884            });
1885        }
1886    }
1887
1888    pub fn insert_tool_output(
1889        &mut self,
1890        tool_use_id: Arc<str>,
1891        output: Task<Result<String>>,
1892        cx: &mut ModelContext<Self>,
1893    ) {
1894        let insert_output_task = cx.spawn(|this, mut cx| {
1895            let tool_use_id = tool_use_id.clone();
1896            async move {
1897                let output = output.await;
1898                this.update(&mut cx, |this, cx| match output {
1899                    Ok(mut output) => {
1900                        const NEWLINE: char = '\n';
1901
1902                        if !output.ends_with(NEWLINE) {
1903                            output.push(NEWLINE);
1904                        }
1905
1906                        let anchor_range = this.buffer.update(cx, |buffer, cx| {
1907                            let insert_start = buffer.len().to_offset(buffer);
1908                            let insert_end = insert_start;
1909
1910                            let start = insert_start;
1911                            let end = start + output.len() - NEWLINE.len_utf8();
1912
1913                            buffer.edit([(insert_start..insert_end, output)], None, cx);
1914
1915                            let output_range = buffer.anchor_after(start)..buffer.anchor_after(end);
1916
1917                            output_range
1918                        });
1919
1920                        this.insert_content(
1921                            Content::ToolResult {
1922                                range: anchor_range.clone(),
1923                                tool_use_id: tool_use_id.clone(),
1924                            },
1925                            cx,
1926                        );
1927
1928                        cx.emit(ContextEvent::ToolFinished {
1929                            tool_use_id,
1930                            output_range: anchor_range,
1931                        });
1932                    }
1933                    Err(err) => {
1934                        if let Some(tool_use) = this.pending_tool_uses_by_id.get_mut(&tool_use_id) {
1935                            tool_use.status = PendingToolUseStatus::Error(err.to_string());
1936                        }
1937                    }
1938                })
1939                .ok();
1940            }
1941        });
1942
1943        if let Some(tool_use) = self.pending_tool_uses_by_id.get_mut(&tool_use_id) {
1944            tool_use.status = PendingToolUseStatus::Running {
1945                _task: insert_output_task.shared(),
1946            };
1947        }
1948    }
1949
1950    pub fn completion_provider_changed(&mut self, cx: &mut ModelContext<Self>) {
1951        self.count_remaining_tokens(cx);
1952    }
1953
1954    fn get_last_valid_message_id(&self, cx: &ModelContext<Self>) -> Option<MessageId> {
1955        self.message_anchors.iter().rev().find_map(|message| {
1956            message
1957                .start
1958                .is_valid(self.buffer.read(cx))
1959                .then_some(message.id)
1960        })
1961    }
1962
1963    pub fn assist(&mut self, cx: &mut ModelContext<Self>) -> Option<MessageAnchor> {
1964        let provider = LanguageModelRegistry::read_global(cx).active_provider()?;
1965        let model = LanguageModelRegistry::read_global(cx).active_model()?;
1966        let last_message_id = self.get_last_valid_message_id(cx)?;
1967
1968        if !provider.is_authenticated(cx) {
1969            log::info!("completion provider has no credentials");
1970            return None;
1971        }
1972        // Compute which messages to cache, including the last one.
1973        self.mark_cache_anchors(&model.cache_configuration(), false, cx);
1974
1975        let mut request = self.to_completion_request(cx);
1976
1977        if cx.has_flag::<ToolUseFeatureFlag>() {
1978            let tool_registry = ToolRegistry::global(cx);
1979            request.tools = tool_registry
1980                .tools()
1981                .into_iter()
1982                .map(|tool| LanguageModelRequestTool {
1983                    name: tool.name(),
1984                    description: tool.description(),
1985                    input_schema: tool.input_schema(),
1986                })
1987                .collect();
1988        }
1989
1990        let assistant_message = self
1991            .insert_message_after(last_message_id, Role::Assistant, MessageStatus::Pending, cx)
1992            .unwrap();
1993
1994        // Queue up the user's next reply.
1995        let user_message = self
1996            .insert_message_after(assistant_message.id, Role::User, MessageStatus::Done, cx)
1997            .unwrap();
1998
1999        let pending_completion_id = post_inc(&mut self.completion_count);
2000
2001        let task = cx.spawn({
2002            |this, mut cx| async move {
2003                let stream = model.stream_completion(request, &cx);
2004                let assistant_message_id = assistant_message.id;
2005                let mut response_latency = None;
2006                let stream_completion = async {
2007                    let request_start = Instant::now();
2008                    let mut events = stream.await?;
2009                    let mut stop_reason = StopReason::EndTurn;
2010
2011                    while let Some(event) = events.next().await {
2012                        if response_latency.is_none() {
2013                            response_latency = Some(request_start.elapsed());
2014                        }
2015                        let event = event?;
2016
2017                        this.update(&mut cx, |this, cx| {
2018                            let message_ix = this
2019                                .message_anchors
2020                                .iter()
2021                                .position(|message| message.id == assistant_message_id)?;
2022                            this.buffer.update(cx, |buffer, cx| {
2023                                let message_old_end_offset = this.message_anchors[message_ix + 1..]
2024                                    .iter()
2025                                    .find(|message| message.start.is_valid(buffer))
2026                                    .map_or(buffer.len(), |message| {
2027                                        message.start.to_offset(buffer).saturating_sub(1)
2028                                    });
2029
2030                                match event {
2031                                    LanguageModelCompletionEvent::Stop(reason) => {
2032                                        stop_reason = reason;
2033                                    }
2034                                    LanguageModelCompletionEvent::Text(chunk) => {
2035                                        buffer.edit(
2036                                            [(
2037                                                message_old_end_offset..message_old_end_offset,
2038                                                chunk,
2039                                            )],
2040                                            None,
2041                                            cx,
2042                                        );
2043                                    }
2044                                    LanguageModelCompletionEvent::ToolUse(tool_use) => {
2045                                        const NEWLINE: char = '\n';
2046
2047                                        let mut text = String::new();
2048                                        text.push(NEWLINE);
2049                                        text.push_str(
2050                                            &serde_json::to_string_pretty(&tool_use)
2051                                                .expect("failed to serialize tool use to JSON"),
2052                                        );
2053                                        text.push(NEWLINE);
2054                                        let text_len = text.len();
2055
2056                                        buffer.edit(
2057                                            [(
2058                                                message_old_end_offset..message_old_end_offset,
2059                                                text,
2060                                            )],
2061                                            None,
2062                                            cx,
2063                                        );
2064
2065                                        let start_ix = message_old_end_offset + NEWLINE.len_utf8();
2066                                        let end_ix =
2067                                            message_old_end_offset + text_len - NEWLINE.len_utf8();
2068                                        let source_range = buffer.anchor_after(start_ix)
2069                                            ..buffer.anchor_after(end_ix);
2070
2071                                        let tool_use_id: Arc<str> = tool_use.id.into();
2072                                        this.pending_tool_uses_by_id.insert(
2073                                            tool_use_id.clone(),
2074                                            PendingToolUse {
2075                                                id: tool_use_id,
2076                                                name: tool_use.name,
2077                                                input: tool_use.input,
2078                                                status: PendingToolUseStatus::Idle,
2079                                                source_range,
2080                                            },
2081                                        );
2082                                    }
2083                                }
2084                            });
2085
2086                            cx.emit(ContextEvent::StreamedCompletion);
2087
2088                            Some(())
2089                        })?;
2090                        smol::future::yield_now().await;
2091                    }
2092                    this.update(&mut cx, |this, cx| {
2093                        this.pending_completions
2094                            .retain(|completion| completion.id != pending_completion_id);
2095                        this.summarize(false, cx);
2096                        this.update_cache_status_for_completion(cx);
2097                    })?;
2098
2099                    anyhow::Ok(stop_reason)
2100                };
2101
2102                let result = stream_completion.await;
2103
2104                this.update(&mut cx, |this, cx| {
2105                    let error_message = result
2106                        .as_ref()
2107                        .err()
2108                        .map(|error| error.to_string().trim().to_string());
2109
2110                    if let Some(error_message) = error_message.as_ref() {
2111                        cx.emit(ContextEvent::ShowAssistError(SharedString::from(
2112                            error_message.clone(),
2113                        )));
2114                    }
2115
2116                    this.update_metadata(assistant_message_id, cx, |metadata| {
2117                        if let Some(error_message) = error_message.as_ref() {
2118                            metadata.status =
2119                                MessageStatus::Error(SharedString::from(error_message.clone()));
2120                        } else {
2121                            metadata.status = MessageStatus::Done;
2122                        }
2123                    });
2124
2125                    if let Some(telemetry) = this.telemetry.as_ref() {
2126                        telemetry.report_assistant_event(
2127                            Some(this.id.0.clone()),
2128                            AssistantKind::Panel,
2129                            model.telemetry_id(),
2130                            response_latency,
2131                            error_message,
2132                        );
2133                    }
2134
2135                    if let Ok(stop_reason) = result {
2136                        match stop_reason {
2137                            StopReason::ToolUse => {
2138                                cx.emit(ContextEvent::UsePendingTools);
2139                            }
2140                            StopReason::EndTurn => {}
2141                            StopReason::MaxTokens => {}
2142                        }
2143                    }
2144                })
2145                .ok();
2146            }
2147        });
2148
2149        self.pending_completions.push(PendingCompletion {
2150            id: pending_completion_id,
2151            assistant_message_id: assistant_message.id,
2152            _task: task,
2153        });
2154
2155        Some(user_message)
2156    }
2157
2158    pub fn to_completion_request(&self, cx: &AppContext) -> LanguageModelRequest {
2159        let buffer = self.buffer.read(cx);
2160
2161        let mut contents = self.contents(cx).peekable();
2162
2163        fn collect_text_content(buffer: &Buffer, range: Range<usize>) -> Option<String> {
2164            let text: String = buffer.text_for_range(range.clone()).collect();
2165            if text.trim().is_empty() {
2166                None
2167            } else {
2168                Some(text)
2169            }
2170        }
2171
2172        let mut completion_request = LanguageModelRequest {
2173            messages: Vec::new(),
2174            tools: Vec::new(),
2175            stop: Vec::new(),
2176            temperature: 1.0,
2177        };
2178        for message in self.messages(cx) {
2179            if message.status != MessageStatus::Done {
2180                continue;
2181            }
2182
2183            let mut offset = message.offset_range.start;
2184            let mut request_message = LanguageModelRequestMessage {
2185                role: message.role,
2186                content: Vec::new(),
2187                cache: message
2188                    .cache
2189                    .as_ref()
2190                    .map_or(false, |cache| cache.is_anchor),
2191            };
2192
2193            while let Some(content) = contents.peek() {
2194                if content
2195                    .range()
2196                    .end
2197                    .cmp(&message.anchor_range.end, buffer)
2198                    .is_lt()
2199                {
2200                    let content = contents.next().unwrap();
2201                    let range = content.range().to_offset(buffer);
2202                    request_message.content.extend(
2203                        collect_text_content(buffer, offset..range.start).map(MessageContent::Text),
2204                    );
2205
2206                    match content {
2207                        Content::Image { image, .. } => {
2208                            if let Some(image) = image.clone().now_or_never().flatten() {
2209                                request_message
2210                                    .content
2211                                    .push(language_model::MessageContent::Image(image));
2212                            }
2213                        }
2214                        Content::ToolUse { tool_use, .. } => {
2215                            request_message
2216                                .content
2217                                .push(language_model::MessageContent::ToolUse(tool_use.clone()));
2218                        }
2219                        Content::ToolResult { tool_use_id, .. } => {
2220                            request_message.content.push(
2221                                language_model::MessageContent::ToolResult(
2222                                    LanguageModelToolResult {
2223                                        tool_use_id: tool_use_id.to_string(),
2224                                        is_error: false,
2225                                        content: collect_text_content(buffer, range.clone())
2226                                            .unwrap_or_default(),
2227                                    },
2228                                ),
2229                            );
2230                        }
2231                    }
2232
2233                    offset = range.end;
2234                } else {
2235                    break;
2236                }
2237            }
2238
2239            request_message.content.extend(
2240                collect_text_content(buffer, offset..message.offset_range.end)
2241                    .map(MessageContent::Text),
2242            );
2243
2244            completion_request.messages.push(request_message);
2245        }
2246
2247        completion_request
2248    }
2249
2250    pub fn cancel_last_assist(&mut self, cx: &mut ModelContext<Self>) -> bool {
2251        if let Some(pending_completion) = self.pending_completions.pop() {
2252            self.update_metadata(pending_completion.assistant_message_id, cx, |metadata| {
2253                if metadata.status == MessageStatus::Pending {
2254                    metadata.status = MessageStatus::Canceled;
2255                }
2256            });
2257            true
2258        } else {
2259            false
2260        }
2261    }
2262
2263    pub fn cycle_message_roles(&mut self, ids: HashSet<MessageId>, cx: &mut ModelContext<Self>) {
2264        for id in &ids {
2265            if let Some(metadata) = self.messages_metadata.get(id) {
2266                let role = metadata.role.cycle();
2267                self.update_metadata(*id, cx, |metadata| metadata.role = role);
2268            }
2269        }
2270
2271        self.message_roles_updated(ids, cx);
2272    }
2273
2274    fn message_roles_updated(&mut self, ids: HashSet<MessageId>, cx: &mut ModelContext<Self>) {
2275        let mut ranges = Vec::new();
2276        for message in self.messages(cx) {
2277            if ids.contains(&message.id) {
2278                ranges.push(message.anchor_range.clone());
2279            }
2280        }
2281
2282        let buffer = self.buffer.read(cx).text_snapshot();
2283        let mut updated = Vec::new();
2284        let mut removed = Vec::new();
2285        for range in ranges {
2286            self.reparse_workflow_steps_in_range(range, &buffer, &mut updated, &mut removed, cx);
2287        }
2288
2289        if !updated.is_empty() || !removed.is_empty() {
2290            cx.emit(ContextEvent::WorkflowStepsUpdated { removed, updated })
2291        }
2292    }
2293
2294    pub fn update_metadata(
2295        &mut self,
2296        id: MessageId,
2297        cx: &mut ModelContext<Self>,
2298        f: impl FnOnce(&mut MessageMetadata),
2299    ) {
2300        let version = self.version.clone();
2301        let timestamp = self.next_timestamp();
2302        if let Some(metadata) = self.messages_metadata.get_mut(&id) {
2303            f(metadata);
2304            metadata.timestamp = timestamp;
2305            let operation = ContextOperation::UpdateMessage {
2306                message_id: id,
2307                metadata: metadata.clone(),
2308                version,
2309            };
2310            self.push_op(operation, cx);
2311            cx.emit(ContextEvent::MessagesEdited);
2312            cx.notify();
2313        }
2314    }
2315
2316    pub fn insert_message_after(
2317        &mut self,
2318        message_id: MessageId,
2319        role: Role,
2320        status: MessageStatus,
2321        cx: &mut ModelContext<Self>,
2322    ) -> Option<MessageAnchor> {
2323        if let Some(prev_message_ix) = self
2324            .message_anchors
2325            .iter()
2326            .position(|message| message.id == message_id)
2327        {
2328            // Find the next valid message after the one we were given.
2329            let mut next_message_ix = prev_message_ix + 1;
2330            while let Some(next_message) = self.message_anchors.get(next_message_ix) {
2331                if next_message.start.is_valid(self.buffer.read(cx)) {
2332                    break;
2333                }
2334                next_message_ix += 1;
2335            }
2336
2337            let start = self.buffer.update(cx, |buffer, cx| {
2338                let offset = self
2339                    .message_anchors
2340                    .get(next_message_ix)
2341                    .map_or(buffer.len(), |message| {
2342                        buffer.clip_offset(message.start.to_offset(buffer) - 1, Bias::Left)
2343                    });
2344                buffer.edit([(offset..offset, "\n")], None, cx);
2345                buffer.anchor_before(offset + 1)
2346            });
2347
2348            let version = self.version.clone();
2349            let anchor = MessageAnchor {
2350                id: MessageId(self.next_timestamp()),
2351                start,
2352            };
2353            let metadata = MessageMetadata {
2354                role,
2355                status,
2356                timestamp: anchor.id.0,
2357                cache: None,
2358            };
2359            self.insert_message(anchor.clone(), metadata.clone(), cx);
2360            self.push_op(
2361                ContextOperation::InsertMessage {
2362                    anchor: anchor.clone(),
2363                    metadata,
2364                    version,
2365                },
2366                cx,
2367            );
2368            Some(anchor)
2369        } else {
2370            None
2371        }
2372    }
2373
2374    pub fn insert_content(&mut self, content: Content, cx: &mut ModelContext<Self>) {
2375        let buffer = self.buffer.read(cx);
2376        let insertion_ix = match self
2377            .contents
2378            .binary_search_by(|probe| probe.cmp(&content, buffer))
2379        {
2380            Ok(ix) => {
2381                self.contents.remove(ix);
2382                ix
2383            }
2384            Err(ix) => ix,
2385        };
2386        self.contents.insert(insertion_ix, content);
2387        cx.emit(ContextEvent::MessagesEdited);
2388    }
2389
2390    pub fn contents<'a>(&'a self, cx: &'a AppContext) -> impl 'a + Iterator<Item = Content> {
2391        let buffer = self.buffer.read(cx);
2392        self.contents
2393            .iter()
2394            .filter(|content| {
2395                let range = content.range();
2396                range.start.is_valid(buffer) && range.end.is_valid(buffer)
2397            })
2398            .cloned()
2399    }
2400
2401    pub fn split_message(
2402        &mut self,
2403        range: Range<usize>,
2404        cx: &mut ModelContext<Self>,
2405    ) -> (Option<MessageAnchor>, Option<MessageAnchor>) {
2406        let start_message = self.message_for_offset(range.start, cx);
2407        let end_message = self.message_for_offset(range.end, cx);
2408        if let Some((start_message, end_message)) = start_message.zip(end_message) {
2409            // Prevent splitting when range spans multiple messages.
2410            if start_message.id != end_message.id {
2411                return (None, None);
2412            }
2413
2414            let message = start_message;
2415            let role = message.role;
2416            let mut edited_buffer = false;
2417
2418            let mut suffix_start = None;
2419
2420            // TODO: why did this start panicking?
2421            if range.start > message.offset_range.start
2422                && range.end < message.offset_range.end.saturating_sub(1)
2423            {
2424                if self.buffer.read(cx).chars_at(range.end).next() == Some('\n') {
2425                    suffix_start = Some(range.end + 1);
2426                } else if self.buffer.read(cx).reversed_chars_at(range.end).next() == Some('\n') {
2427                    suffix_start = Some(range.end);
2428                }
2429            }
2430
2431            let version = self.version.clone();
2432            let suffix = if let Some(suffix_start) = suffix_start {
2433                MessageAnchor {
2434                    id: MessageId(self.next_timestamp()),
2435                    start: self.buffer.read(cx).anchor_before(suffix_start),
2436                }
2437            } else {
2438                self.buffer.update(cx, |buffer, cx| {
2439                    buffer.edit([(range.end..range.end, "\n")], None, cx);
2440                });
2441                edited_buffer = true;
2442                MessageAnchor {
2443                    id: MessageId(self.next_timestamp()),
2444                    start: self.buffer.read(cx).anchor_before(range.end + 1),
2445                }
2446            };
2447
2448            let suffix_metadata = MessageMetadata {
2449                role,
2450                status: MessageStatus::Done,
2451                timestamp: suffix.id.0,
2452                cache: None,
2453            };
2454            self.insert_message(suffix.clone(), suffix_metadata.clone(), cx);
2455            self.push_op(
2456                ContextOperation::InsertMessage {
2457                    anchor: suffix.clone(),
2458                    metadata: suffix_metadata,
2459                    version,
2460                },
2461                cx,
2462            );
2463
2464            let new_messages =
2465                if range.start == range.end || range.start == message.offset_range.start {
2466                    (None, Some(suffix))
2467                } else {
2468                    let mut prefix_end = None;
2469                    if range.start > message.offset_range.start
2470                        && range.end < message.offset_range.end - 1
2471                    {
2472                        if self.buffer.read(cx).chars_at(range.start).next() == Some('\n') {
2473                            prefix_end = Some(range.start + 1);
2474                        } else if self.buffer.read(cx).reversed_chars_at(range.start).next()
2475                            == Some('\n')
2476                        {
2477                            prefix_end = Some(range.start);
2478                        }
2479                    }
2480
2481                    let version = self.version.clone();
2482                    let selection = if let Some(prefix_end) = prefix_end {
2483                        MessageAnchor {
2484                            id: MessageId(self.next_timestamp()),
2485                            start: self.buffer.read(cx).anchor_before(prefix_end),
2486                        }
2487                    } else {
2488                        self.buffer.update(cx, |buffer, cx| {
2489                            buffer.edit([(range.start..range.start, "\n")], None, cx)
2490                        });
2491                        edited_buffer = true;
2492                        MessageAnchor {
2493                            id: MessageId(self.next_timestamp()),
2494                            start: self.buffer.read(cx).anchor_before(range.end + 1),
2495                        }
2496                    };
2497
2498                    let selection_metadata = MessageMetadata {
2499                        role,
2500                        status: MessageStatus::Done,
2501                        timestamp: selection.id.0,
2502                        cache: None,
2503                    };
2504                    self.insert_message(selection.clone(), selection_metadata.clone(), cx);
2505                    self.push_op(
2506                        ContextOperation::InsertMessage {
2507                            anchor: selection.clone(),
2508                            metadata: selection_metadata,
2509                            version,
2510                        },
2511                        cx,
2512                    );
2513
2514                    (Some(selection), Some(suffix))
2515                };
2516
2517            if !edited_buffer {
2518                cx.emit(ContextEvent::MessagesEdited);
2519            }
2520            new_messages
2521        } else {
2522            (None, None)
2523        }
2524    }
2525
2526    fn insert_message(
2527        &mut self,
2528        new_anchor: MessageAnchor,
2529        new_metadata: MessageMetadata,
2530        cx: &mut ModelContext<Self>,
2531    ) {
2532        cx.emit(ContextEvent::MessagesEdited);
2533
2534        self.messages_metadata.insert(new_anchor.id, new_metadata);
2535
2536        let buffer = self.buffer.read(cx);
2537        let insertion_ix = self
2538            .message_anchors
2539            .iter()
2540            .position(|anchor| {
2541                let comparison = new_anchor.start.cmp(&anchor.start, buffer);
2542                comparison.is_lt() || (comparison.is_eq() && new_anchor.id > anchor.id)
2543            })
2544            .unwrap_or(self.message_anchors.len());
2545        self.message_anchors.insert(insertion_ix, new_anchor);
2546    }
2547
2548    pub(super) fn summarize(&mut self, replace_old: bool, cx: &mut ModelContext<Self>) {
2549        let Some(provider) = LanguageModelRegistry::read_global(cx).active_provider() else {
2550            return;
2551        };
2552        let Some(model) = LanguageModelRegistry::read_global(cx).active_model() else {
2553            return;
2554        };
2555
2556        if replace_old || (self.message_anchors.len() >= 2 && self.summary.is_none()) {
2557            if !provider.is_authenticated(cx) {
2558                return;
2559            }
2560
2561            let mut request = self.to_completion_request(cx);
2562            request.messages.push(LanguageModelRequestMessage {
2563                role: Role::User,
2564                content: vec![
2565                    "Summarize the context into a short title without punctuation.".into(),
2566                ],
2567                cache: false,
2568            });
2569
2570            self.pending_summary = cx.spawn(|this, mut cx| {
2571                async move {
2572                    let stream = model.stream_completion_text(request, &cx);
2573                    let mut messages = stream.await?;
2574
2575                    let mut replaced = !replace_old;
2576                    while let Some(message) = messages.next().await {
2577                        let text = message?;
2578                        let mut lines = text.lines();
2579                        this.update(&mut cx, |this, cx| {
2580                            let version = this.version.clone();
2581                            let timestamp = this.next_timestamp();
2582                            let summary = this.summary.get_or_insert(ContextSummary::default());
2583                            if !replaced && replace_old {
2584                                summary.text.clear();
2585                                replaced = true;
2586                            }
2587                            summary.text.extend(lines.next());
2588                            summary.timestamp = timestamp;
2589                            let operation = ContextOperation::UpdateSummary {
2590                                summary: summary.clone(),
2591                                version,
2592                            };
2593                            this.push_op(operation, cx);
2594                            cx.emit(ContextEvent::SummaryChanged);
2595                        })?;
2596
2597                        // Stop if the LLM generated multiple lines.
2598                        if lines.next().is_some() {
2599                            break;
2600                        }
2601                    }
2602
2603                    this.update(&mut cx, |this, cx| {
2604                        let version = this.version.clone();
2605                        let timestamp = this.next_timestamp();
2606                        if let Some(summary) = this.summary.as_mut() {
2607                            summary.done = true;
2608                            summary.timestamp = timestamp;
2609                            let operation = ContextOperation::UpdateSummary {
2610                                summary: summary.clone(),
2611                                version,
2612                            };
2613                            this.push_op(operation, cx);
2614                            cx.emit(ContextEvent::SummaryChanged);
2615                        }
2616                    })?;
2617
2618                    anyhow::Ok(())
2619                }
2620                .log_err()
2621            });
2622        }
2623    }
2624
2625    fn message_for_offset(&self, offset: usize, cx: &AppContext) -> Option<Message> {
2626        self.messages_for_offsets([offset], cx).pop()
2627    }
2628
2629    pub fn messages_for_offsets(
2630        &self,
2631        offsets: impl IntoIterator<Item = usize>,
2632        cx: &AppContext,
2633    ) -> Vec<Message> {
2634        let mut result = Vec::new();
2635
2636        let mut messages = self.messages(cx).peekable();
2637        let mut offsets = offsets.into_iter().peekable();
2638        let mut current_message = messages.next();
2639        while let Some(offset) = offsets.next() {
2640            // Locate the message that contains the offset.
2641            while current_message.as_ref().map_or(false, |message| {
2642                !message.offset_range.contains(&offset) && messages.peek().is_some()
2643            }) {
2644                current_message = messages.next();
2645            }
2646            let Some(message) = current_message.as_ref() else {
2647                break;
2648            };
2649
2650            // Skip offsets that are in the same message.
2651            while offsets.peek().map_or(false, |offset| {
2652                message.offset_range.contains(offset) || messages.peek().is_none()
2653            }) {
2654                offsets.next();
2655            }
2656
2657            result.push(message.clone());
2658        }
2659        result
2660    }
2661
2662    fn messages_from_anchors<'a>(
2663        &'a self,
2664        message_anchors: impl Iterator<Item = &'a MessageAnchor> + 'a,
2665        cx: &'a AppContext,
2666    ) -> impl 'a + Iterator<Item = Message> {
2667        let buffer = self.buffer.read(cx);
2668
2669        Self::messages_from_iters(buffer, &self.messages_metadata, message_anchors.enumerate())
2670    }
2671
2672    pub fn messages<'a>(&'a self, cx: &'a AppContext) -> impl 'a + Iterator<Item = Message> {
2673        self.messages_from_anchors(self.message_anchors.iter(), cx)
2674    }
2675
2676    pub fn messages_from_iters<'a>(
2677        buffer: &'a Buffer,
2678        metadata: &'a HashMap<MessageId, MessageMetadata>,
2679        messages: impl Iterator<Item = (usize, &'a MessageAnchor)> + 'a,
2680    ) -> impl 'a + Iterator<Item = Message> {
2681        let mut messages = messages.peekable();
2682
2683        iter::from_fn(move || {
2684            if let Some((start_ix, message_anchor)) = messages.next() {
2685                let metadata = metadata.get(&message_anchor.id)?;
2686
2687                let message_start = message_anchor.start.to_offset(buffer);
2688                let mut message_end = None;
2689                let mut end_ix = start_ix;
2690                while let Some((_, next_message)) = messages.peek() {
2691                    if next_message.start.is_valid(buffer) {
2692                        message_end = Some(next_message.start);
2693                        break;
2694                    } else {
2695                        end_ix += 1;
2696                        messages.next();
2697                    }
2698                }
2699                let message_end_anchor = message_end.unwrap_or(language::Anchor::MAX);
2700                let message_end = message_end_anchor.to_offset(buffer);
2701
2702                return Some(Message {
2703                    index_range: start_ix..end_ix,
2704                    offset_range: message_start..message_end,
2705                    anchor_range: message_anchor.start..message_end_anchor,
2706                    id: message_anchor.id,
2707                    role: metadata.role,
2708                    status: metadata.status.clone(),
2709                    cache: metadata.cache.clone(),
2710                });
2711            }
2712            None
2713        })
2714    }
2715
2716    pub fn save(
2717        &mut self,
2718        debounce: Option<Duration>,
2719        fs: Arc<dyn Fs>,
2720        cx: &mut ModelContext<Context>,
2721    ) {
2722        if self.replica_id() != ReplicaId::default() {
2723            // Prevent saving a remote context for now.
2724            return;
2725        }
2726
2727        self.pending_save = cx.spawn(|this, mut cx| async move {
2728            if let Some(debounce) = debounce {
2729                cx.background_executor().timer(debounce).await;
2730            }
2731
2732            let (old_path, summary) = this.read_with(&cx, |this, _| {
2733                let path = this.path.clone();
2734                let summary = if let Some(summary) = this.summary.as_ref() {
2735                    if summary.done {
2736                        Some(summary.text.clone())
2737                    } else {
2738                        None
2739                    }
2740                } else {
2741                    None
2742                };
2743                (path, summary)
2744            })?;
2745
2746            if let Some(summary) = summary {
2747                let context = this.read_with(&cx, |this, cx| this.serialize(cx))?;
2748                let mut discriminant = 1;
2749                let mut new_path;
2750                loop {
2751                    new_path = contexts_dir().join(&format!(
2752                        "{} - {}.zed.json",
2753                        summary.trim(),
2754                        discriminant
2755                    ));
2756                    if fs.is_file(&new_path).await {
2757                        discriminant += 1;
2758                    } else {
2759                        break;
2760                    }
2761                }
2762
2763                fs.create_dir(contexts_dir().as_ref()).await?;
2764                fs.atomic_write(new_path.clone(), serde_json::to_string(&context).unwrap())
2765                    .await?;
2766                if let Some(old_path) = old_path {
2767                    if new_path != old_path {
2768                        fs.remove_file(
2769                            &old_path,
2770                            RemoveOptions {
2771                                recursive: false,
2772                                ignore_if_not_exists: true,
2773                            },
2774                        )
2775                        .await?;
2776                    }
2777                }
2778
2779                this.update(&mut cx, |this, _| this.path = Some(new_path))?;
2780            }
2781
2782            Ok(())
2783        });
2784    }
2785
2786    pub(crate) fn custom_summary(&mut self, custom_summary: String, cx: &mut ModelContext<Self>) {
2787        let timestamp = self.next_timestamp();
2788        let summary = self.summary.get_or_insert(ContextSummary::default());
2789        summary.timestamp = timestamp;
2790        summary.done = true;
2791        summary.text = custom_summary;
2792        cx.emit(ContextEvent::SummaryChanged);
2793    }
2794}
2795
2796#[derive(Debug, Default)]
2797pub struct ContextVersion {
2798    context: clock::Global,
2799    buffer: clock::Global,
2800}
2801
2802impl ContextVersion {
2803    pub fn from_proto(proto: &proto::ContextVersion) -> Self {
2804        Self {
2805            context: language::proto::deserialize_version(&proto.context_version),
2806            buffer: language::proto::deserialize_version(&proto.buffer_version),
2807        }
2808    }
2809
2810    pub fn to_proto(&self, context_id: ContextId) -> proto::ContextVersion {
2811        proto::ContextVersion {
2812            context_id: context_id.to_proto(),
2813            context_version: language::proto::serialize_version(&self.context),
2814            buffer_version: language::proto::serialize_version(&self.buffer),
2815        }
2816    }
2817}
2818
2819#[derive(Debug, Clone)]
2820pub struct PendingSlashCommand {
2821    pub name: String,
2822    pub arguments: SmallVec<[String; 3]>,
2823    pub status: PendingSlashCommandStatus,
2824    pub source_range: Range<language::Anchor>,
2825}
2826
2827#[derive(Debug, Clone)]
2828pub enum PendingSlashCommandStatus {
2829    Idle,
2830    Running { _task: Shared<Task<()>> },
2831    Error(String),
2832}
2833
2834pub(crate) struct ToolUseFeatureFlag;
2835
2836impl FeatureFlag for ToolUseFeatureFlag {
2837    const NAME: &'static str = "assistant-tool-use";
2838
2839    fn enabled_for_staff() -> bool {
2840        false
2841    }
2842}
2843
2844#[derive(Debug, Clone)]
2845pub struct PendingToolUse {
2846    pub id: Arc<str>,
2847    pub name: String,
2848    pub input: serde_json::Value,
2849    pub status: PendingToolUseStatus,
2850    pub source_range: Range<language::Anchor>,
2851}
2852
2853#[derive(Debug, Clone)]
2854pub enum PendingToolUseStatus {
2855    Idle,
2856    Running { _task: Shared<Task<()>> },
2857    Error(String),
2858}
2859
2860impl PendingToolUseStatus {
2861    pub fn is_idle(&self) -> bool {
2862        matches!(self, PendingToolUseStatus::Idle)
2863    }
2864}
2865
2866#[derive(Serialize, Deserialize)]
2867pub struct SavedMessage {
2868    pub id: MessageId,
2869    pub start: usize,
2870    pub metadata: MessageMetadata,
2871}
2872
2873#[derive(Serialize, Deserialize)]
2874pub struct SavedContext {
2875    pub id: Option<ContextId>,
2876    pub zed: String,
2877    pub version: String,
2878    pub text: String,
2879    pub messages: Vec<SavedMessage>,
2880    pub summary: String,
2881    pub slash_command_output_sections:
2882        Vec<assistant_slash_command::SlashCommandOutputSection<usize>>,
2883}
2884
2885impl SavedContext {
2886    pub const VERSION: &'static str = "0.4.0";
2887
2888    pub fn from_json(json: &str) -> Result<Self> {
2889        let saved_context_json = serde_json::from_str::<serde_json::Value>(json)?;
2890        match saved_context_json
2891            .get("version")
2892            .ok_or_else(|| anyhow!("version not found"))?
2893        {
2894            serde_json::Value::String(version) => match version.as_str() {
2895                SavedContext::VERSION => {
2896                    Ok(serde_json::from_value::<SavedContext>(saved_context_json)?)
2897                }
2898                SavedContextV0_3_0::VERSION => {
2899                    let saved_context =
2900                        serde_json::from_value::<SavedContextV0_3_0>(saved_context_json)?;
2901                    Ok(saved_context.upgrade())
2902                }
2903                SavedContextV0_2_0::VERSION => {
2904                    let saved_context =
2905                        serde_json::from_value::<SavedContextV0_2_0>(saved_context_json)?;
2906                    Ok(saved_context.upgrade())
2907                }
2908                SavedContextV0_1_0::VERSION => {
2909                    let saved_context =
2910                        serde_json::from_value::<SavedContextV0_1_0>(saved_context_json)?;
2911                    Ok(saved_context.upgrade())
2912                }
2913                _ => Err(anyhow!("unrecognized saved context version: {}", version)),
2914            },
2915            _ => Err(anyhow!("version not found on saved context")),
2916        }
2917    }
2918
2919    fn into_ops(
2920        self,
2921        buffer: &Model<Buffer>,
2922        cx: &mut ModelContext<Context>,
2923    ) -> Vec<ContextOperation> {
2924        let mut operations = Vec::new();
2925        let mut version = clock::Global::new();
2926        let mut next_timestamp = clock::Lamport::new(ReplicaId::default());
2927
2928        let mut first_message_metadata = None;
2929        for message in self.messages {
2930            if message.id == MessageId(clock::Lamport::default()) {
2931                first_message_metadata = Some(message.metadata);
2932            } else {
2933                operations.push(ContextOperation::InsertMessage {
2934                    anchor: MessageAnchor {
2935                        id: message.id,
2936                        start: buffer.read(cx).anchor_before(message.start),
2937                    },
2938                    metadata: MessageMetadata {
2939                        role: message.metadata.role,
2940                        status: message.metadata.status,
2941                        timestamp: message.metadata.timestamp,
2942                        cache: None,
2943                    },
2944                    version: version.clone(),
2945                });
2946                version.observe(message.id.0);
2947                next_timestamp.observe(message.id.0);
2948            }
2949        }
2950
2951        if let Some(metadata) = first_message_metadata {
2952            let timestamp = next_timestamp.tick();
2953            operations.push(ContextOperation::UpdateMessage {
2954                message_id: MessageId(clock::Lamport::default()),
2955                metadata: MessageMetadata {
2956                    role: metadata.role,
2957                    status: metadata.status,
2958                    timestamp,
2959                    cache: None,
2960                },
2961                version: version.clone(),
2962            });
2963            version.observe(timestamp);
2964        }
2965
2966        let timestamp = next_timestamp.tick();
2967        operations.push(ContextOperation::SlashCommandFinished {
2968            id: SlashCommandId(timestamp),
2969            output_range: language::Anchor::MIN..language::Anchor::MAX,
2970            sections: self
2971                .slash_command_output_sections
2972                .into_iter()
2973                .map(|section| {
2974                    let buffer = buffer.read(cx);
2975                    SlashCommandOutputSection {
2976                        range: buffer.anchor_after(section.range.start)
2977                            ..buffer.anchor_before(section.range.end),
2978                        icon: section.icon,
2979                        label: section.label,
2980                    }
2981                })
2982                .collect(),
2983            version: version.clone(),
2984        });
2985        version.observe(timestamp);
2986
2987        let timestamp = next_timestamp.tick();
2988        operations.push(ContextOperation::UpdateSummary {
2989            summary: ContextSummary {
2990                text: self.summary,
2991                done: true,
2992                timestamp,
2993            },
2994            version: version.clone(),
2995        });
2996        version.observe(timestamp);
2997
2998        operations
2999    }
3000}
3001
3002#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
3003struct SavedMessageIdPreV0_4_0(usize);
3004
3005#[derive(Serialize, Deserialize)]
3006struct SavedMessagePreV0_4_0 {
3007    id: SavedMessageIdPreV0_4_0,
3008    start: usize,
3009}
3010
3011#[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
3012struct SavedMessageMetadataPreV0_4_0 {
3013    role: Role,
3014    status: MessageStatus,
3015}
3016
3017#[derive(Serialize, Deserialize)]
3018struct SavedContextV0_3_0 {
3019    id: Option<ContextId>,
3020    zed: String,
3021    version: String,
3022    text: String,
3023    messages: Vec<SavedMessagePreV0_4_0>,
3024    message_metadata: HashMap<SavedMessageIdPreV0_4_0, SavedMessageMetadataPreV0_4_0>,
3025    summary: String,
3026    slash_command_output_sections: Vec<assistant_slash_command::SlashCommandOutputSection<usize>>,
3027}
3028
3029impl SavedContextV0_3_0 {
3030    const VERSION: &'static str = "0.3.0";
3031
3032    fn upgrade(self) -> SavedContext {
3033        SavedContext {
3034            id: self.id,
3035            zed: self.zed,
3036            version: SavedContext::VERSION.into(),
3037            text: self.text,
3038            messages: self
3039                .messages
3040                .into_iter()
3041                .filter_map(|message| {
3042                    let metadata = self.message_metadata.get(&message.id)?;
3043                    let timestamp = clock::Lamport {
3044                        replica_id: ReplicaId::default(),
3045                        value: message.id.0 as u32,
3046                    };
3047                    Some(SavedMessage {
3048                        id: MessageId(timestamp),
3049                        start: message.start,
3050                        metadata: MessageMetadata {
3051                            role: metadata.role,
3052                            status: metadata.status.clone(),
3053                            timestamp,
3054                            cache: None,
3055                        },
3056                    })
3057                })
3058                .collect(),
3059            summary: self.summary,
3060            slash_command_output_sections: self.slash_command_output_sections,
3061        }
3062    }
3063}
3064
3065#[derive(Serialize, Deserialize)]
3066struct SavedContextV0_2_0 {
3067    id: Option<ContextId>,
3068    zed: String,
3069    version: String,
3070    text: String,
3071    messages: Vec<SavedMessagePreV0_4_0>,
3072    message_metadata: HashMap<SavedMessageIdPreV0_4_0, SavedMessageMetadataPreV0_4_0>,
3073    summary: String,
3074}
3075
3076impl SavedContextV0_2_0 {
3077    const VERSION: &'static str = "0.2.0";
3078
3079    fn upgrade(self) -> SavedContext {
3080        SavedContextV0_3_0 {
3081            id: self.id,
3082            zed: self.zed,
3083            version: SavedContextV0_3_0::VERSION.to_string(),
3084            text: self.text,
3085            messages: self.messages,
3086            message_metadata: self.message_metadata,
3087            summary: self.summary,
3088            slash_command_output_sections: Vec::new(),
3089        }
3090        .upgrade()
3091    }
3092}
3093
3094#[derive(Serialize, Deserialize)]
3095struct SavedContextV0_1_0 {
3096    id: Option<ContextId>,
3097    zed: String,
3098    version: String,
3099    text: String,
3100    messages: Vec<SavedMessagePreV0_4_0>,
3101    message_metadata: HashMap<SavedMessageIdPreV0_4_0, SavedMessageMetadataPreV0_4_0>,
3102    summary: String,
3103    api_url: Option<String>,
3104    model: OpenAiModel,
3105}
3106
3107impl SavedContextV0_1_0 {
3108    const VERSION: &'static str = "0.1.0";
3109
3110    fn upgrade(self) -> SavedContext {
3111        SavedContextV0_2_0 {
3112            id: self.id,
3113            zed: self.zed,
3114            version: SavedContextV0_2_0::VERSION.to_string(),
3115            text: self.text,
3116            messages: self.messages,
3117            message_metadata: self.message_metadata,
3118            summary: self.summary,
3119        }
3120        .upgrade()
3121    }
3122}
3123
3124#[derive(Clone)]
3125pub struct SavedContextMetadata {
3126    pub title: String,
3127    pub path: PathBuf,
3128    pub mtime: chrono::DateTime<chrono::Local>,
3129}