agent2: Port more tools (#35987)

Release Notes:

- N/A

---------

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
Co-authored-by: Antonio Scandurra <me@as-cii.com>

Cargo.lock

@@ -204,6 +204,8 @@ dependencies = [
  "gpui",
  "gpui_tokio",
  "handlebars 4.5.0",
+ "html_to_markdown",
+ "http_client",
  "indoc",
  "itertools 0.14.0",
  "language",

crates/action_log/src/action_log.rs

@@ -17,8 +17,6 @@ use util::{
 pub struct ActionLog {
     /// Buffers that we want to notify the model about when they change.
     tracked_buffers: BTreeMap<Entity<Buffer>, TrackedBuffer>,
-    /// Has the model edited a file since it last checked diagnostics?
-    edited_since_project_diagnostics_check: bool,
     /// The project this action log is associated with
     project: Entity<Project>,
 }
@@ -28,7 +26,6 @@ impl ActionLog {
     pub fn new(project: Entity<Project>) -> Self {
         Self {
             tracked_buffers: BTreeMap::default(),
-            edited_since_project_diagnostics_check: false,
             project,
         }
     }
@@ -37,16 +34,6 @@ impl ActionLog {
         &self.project
     }
 
-    /// Notifies a diagnostics check
-    pub fn checked_project_diagnostics(&mut self) {
-        self.edited_since_project_diagnostics_check = false;
-    }
-
-    /// Returns true if any files have been edited since the last project diagnostics check
-    pub fn has_edited_files_since_project_diagnostics_check(&self) -> bool {
-        self.edited_since_project_diagnostics_check
-    }
-
     pub fn latest_snapshot(&self, buffer: &Entity<Buffer>) -> Option<text::BufferSnapshot> {
         Some(self.tracked_buffers.get(buffer)?.snapshot.clone())
     }
@@ -543,14 +530,11 @@ impl ActionLog {
 
     /// Mark a buffer as created by agent, so we can refresh it in the context
     pub fn buffer_created(&mut self, buffer: Entity<Buffer>, cx: &mut Context<Self>) {
-        self.edited_since_project_diagnostics_check = true;
         self.track_buffer_internal(buffer.clone(), true, cx);
     }
 
     /// Mark a buffer as edited by agent, so we can refresh it in the context
     pub fn buffer_edited(&mut self, buffer: Entity<Buffer>, cx: &mut Context<Self>) {
-        self.edited_since_project_diagnostics_check = true;
-
         let tracked_buffer = self.track_buffer_internal(buffer.clone(), false, cx);
         if let TrackedBufferStatus::Deleted = tracked_buffer.status {
             tracked_buffer.status = TrackedBufferStatus::Modified;

crates/agent2/Cargo.toml

@@ -27,6 +27,8 @@ fs.workspace = true
 futures.workspace = true
 gpui.workspace = true
 handlebars = { workspace = true, features = ["rust-embed"] }
+html_to_markdown.workspace = true
+http_client.workspace = true
 indoc.workspace = true
 itertools.workspace = true
 language.workspace = true

crates/agent2/src/agent.rs

@@ -1,8 +1,8 @@
 use crate::{AgentResponseEvent, Thread, templates::Templates};
 use crate::{
-    CopyPathTool, CreateDirectoryTool, EditFileTool, FindPathTool, GrepTool, ListDirectoryTool,
-    MovePathTool, NowTool, OpenTool, ReadFileTool, TerminalTool, ThinkingTool,
-    ToolCallAuthorization, WebSearchTool,
+    CopyPathTool, CreateDirectoryTool, DiagnosticsTool, EditFileTool, FetchTool, FindPathTool,
+    GrepTool, ListDirectoryTool, MovePathTool, NowTool, OpenTool, ReadFileTool, TerminalTool,
+    ThinkingTool, ToolCallAuthorization, WebSearchTool,
 };
 use acp_thread::ModelSelector;
 use agent_client_protocol as acp;
@@ -420,11 +420,13 @@ impl acp_thread::AgentConnection for NativeAgentConnection {
                         let mut thread = Thread::new(project.clone(), agent.project_context.clone(), action_log.clone(), agent.templates.clone(), default_model);
                         thread.add_tool(CreateDirectoryTool::new(project.clone()));
                         thread.add_tool(CopyPathTool::new(project.clone()));
+                        thread.add_tool(DiagnosticsTool::new(project.clone()));
                         thread.add_tool(MovePathTool::new(project.clone()));
                         thread.add_tool(ListDirectoryTool::new(project.clone()));
                         thread.add_tool(OpenTool::new(project.clone()));
                         thread.add_tool(ThinkingTool);
                         thread.add_tool(FindPathTool::new(project.clone()));
+                        thread.add_tool(FetchTool::new(project.read(cx).client().http_client()));
                         thread.add_tool(GrepTool::new(project.clone()));
                         thread.add_tool(ReadFileTool::new(project.clone(), action_log));
                         thread.add_tool(EditFileTool::new(cx.entity()));

crates/agent2/src/tools.rs

@@ -1,7 +1,9 @@
 mod copy_path_tool;
 mod create_directory_tool;
 mod delete_path_tool;
+mod diagnostics_tool;
 mod edit_file_tool;
+mod fetch_tool;
 mod find_path_tool;
 mod grep_tool;
 mod list_directory_tool;
@@ -16,7 +18,9 @@ mod web_search_tool;
 pub use copy_path_tool::*;
 pub use create_directory_tool::*;
 pub use delete_path_tool::*;
+pub use diagnostics_tool::*;
 pub use edit_file_tool::*;
+pub use fetch_tool::*;
 pub use find_path_tool::*;
 pub use grep_tool::*;
 pub use list_directory_tool::*;

crates/agent2/src/tools/diagnostics_tool.rs

@@ -0,0 +1,177 @@
+use crate::{AgentTool, ToolCallEventStream};
+use agent_client_protocol as acp;
+use anyhow::{Result, anyhow};
+use gpui::{App, Entity, Task};
+use language::{DiagnosticSeverity, OffsetRangeExt};
+use project::Project;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use std::{fmt::Write, path::Path, sync::Arc};
+use ui::SharedString;
+use util::markdown::MarkdownInlineCode;
+
+/// Get errors and warnings for the project or a specific file.
+///
+/// This tool can be invoked after a series of edits to determine if further edits are necessary, or if the user asks to fix errors or warnings in their codebase.
+///
+/// When a path is provided, shows all diagnostics for that specific file.
+/// When no path is provided, shows a summary of error and warning counts for all files in the project.
+///
+/// <example>
+/// To get diagnostics for a specific file:
+/// {
+///     "path": "src/main.rs"
+/// }
+///
+/// To get a project-wide diagnostic summary:
+/// {}
+/// </example>
+///
+/// <guidelines>
+/// - If you think you can fix a diagnostic, make 1-2 attempts and then give up.
+/// - Don't remove code you've generated just because you can't fix an error. The user can help you fix it.
+/// </guidelines>
+#[derive(Debug, Serialize, Deserialize, JsonSchema)]
+pub struct DiagnosticsToolInput {
+    /// The path to get diagnostics for. If not provided, returns a project-wide summary.
+    ///
+    /// This path should never be absolute, and the first component
+    /// of the path should always be a root directory in a project.
+    ///
+    /// <example>
+    /// If the project has the following root directories:
+    ///
+    /// - lorem
+    /// - ipsum
+    ///
+    /// If you wanna access diagnostics for `dolor.txt` in `ipsum`, you should use the path `ipsum/dolor.txt`.
+    /// </example>
+    pub path: Option<String>,
+}
+
+pub struct DiagnosticsTool {
+    project: Entity<Project>,
+}
+
+impl DiagnosticsTool {
+    pub fn new(project: Entity<Project>) -> Self {
+        Self { project }
+    }
+}
+
+impl AgentTool for DiagnosticsTool {
+    type Input = DiagnosticsToolInput;
+    type Output = String;
+
+    fn name(&self) -> SharedString {
+        "diagnostics".into()
+    }
+
+    fn kind(&self) -> acp::ToolKind {
+        acp::ToolKind::Read
+    }
+
+    fn initial_title(&self, input: Result<Self::Input, serde_json::Value>) -> SharedString {
+        if let Some(path) = input.ok().and_then(|input| match input.path {
+            Some(path) if !path.is_empty() => Some(path),
+            _ => None,
+        }) {
+            format!("Check diagnostics for {}", MarkdownInlineCode(&path)).into()
+        } else {
+            "Check project diagnostics".into()
+        }
+    }
+
+    fn run(
+        self: Arc<Self>,
+        input: Self::Input,
+        event_stream: ToolCallEventStream,
+        cx: &mut App,
+    ) -> Task<Result<Self::Output>> {
+        match input.path {
+            Some(path) if !path.is_empty() => {
+                let Some(project_path) = self.project.read(cx).find_project_path(&path, cx) else {
+                    return Task::ready(Err(anyhow!("Could not find path {path} in project",)));
+                };
+
+                let buffer = self
+                    .project
+                    .update(cx, |project, cx| project.open_buffer(project_path, cx));
+
+                cx.spawn(async move |cx| {
+                    let mut output = String::new();
+                    let buffer = buffer.await?;
+                    let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
+
+                    for (_, group) in snapshot.diagnostic_groups(None) {
+                        let entry = &group.entries[group.primary_ix];
+                        let range = entry.range.to_point(&snapshot);
+                        let severity = match entry.diagnostic.severity {
+                            DiagnosticSeverity::ERROR => "error",
+                            DiagnosticSeverity::WARNING => "warning",
+                            _ => continue,
+                        };
+
+                        writeln!(
+                            output,
+                            "{} at line {}: {}",
+                            severity,
+                            range.start.row + 1,
+                            entry.diagnostic.message
+                        )?;
+
+                        event_stream.update_fields(acp::ToolCallUpdateFields {
+                            content: Some(vec![output.clone().into()]),
+                            ..Default::default()
+                        });
+                    }
+
+                    if output.is_empty() {
+                        Ok("File doesn't have errors or warnings!".to_string())
+                    } else {
+                        Ok(output)
+                    }
+                })
+            }
+            _ => {
+                let project = self.project.read(cx);
+                let mut output = String::new();
+                let mut has_diagnostics = false;
+
+                for (project_path, _, summary) in project.diagnostic_summaries(true, cx) {
+                    if summary.error_count > 0 || summary.warning_count > 0 {
+                        let Some(worktree) = project.worktree_for_id(project_path.worktree_id, cx)
+                        else {
+                            continue;
+                        };
+
+                        has_diagnostics = true;
+                        output.push_str(&format!(
+                            "{}: {} error(s), {} warning(s)\n",
+                            Path::new(worktree.read(cx).root_name())
+                                .join(project_path.path)
+                                .display(),
+                            summary.error_count,
+                            summary.warning_count
+                        ));
+                    }
+                }
+
+                if has_diagnostics {
+                    event_stream.update_fields(acp::ToolCallUpdateFields {
+                        content: Some(vec![output.clone().into()]),
+                        ..Default::default()
+                    });
+                    Task::ready(Ok(output))
+                } else {
+                    let text = "No errors or warnings found in the project.";
+                    event_stream.update_fields(acp::ToolCallUpdateFields {
+                        content: Some(vec![text.into()]),
+                        ..Default::default()
+                    });
+                    Task::ready(Ok(text.into()))
+                }
+            }
+        }
+    }
+}

crates/agent2/src/tools/fetch_tool.rs

@@ -0,0 +1,161 @@
+use std::rc::Rc;
+use std::sync::Arc;
+use std::{borrow::Cow, cell::RefCell};
+
+use agent_client_protocol as acp;
+use anyhow::{Context as _, Result, bail};
+use futures::AsyncReadExt as _;
+use gpui::{App, AppContext as _, Task};
+use html_to_markdown::{TagHandler, convert_html_to_markdown, markdown};
+use http_client::{AsyncBody, HttpClientWithUrl};
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use ui::SharedString;
+use util::markdown::MarkdownEscaped;
+
+use crate::{AgentTool, ToolCallEventStream};
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
+enum ContentType {
+    Html,
+    Plaintext,
+    Json,
+}
+
+/// Fetches a URL and returns the content as Markdown.
+#[derive(Debug, Serialize, Deserialize, JsonSchema)]
+pub struct FetchToolInput {
+    /// The URL to fetch.
+    url: String,
+}
+
+pub struct FetchTool {
+    http_client: Arc<HttpClientWithUrl>,
+}
+
+impl FetchTool {
+    pub fn new(http_client: Arc<HttpClientWithUrl>) -> Self {
+        Self { http_client }
+    }
+
+    async fn build_message(http_client: Arc<HttpClientWithUrl>, url: &str) -> Result<String> {
+        let url = if !url.starts_with("https://") && !url.starts_with("http://") {
+            Cow::Owned(format!("https://{url}"))
+        } else {
+            Cow::Borrowed(url)
+        };
+
+        let mut response = http_client.get(&url, AsyncBody::default(), true).await?;
+
+        let mut body = Vec::new();
+        response
+            .body_mut()
+            .read_to_end(&mut body)
+            .await
+            .context("error reading response body")?;
+
+        if response.status().is_client_error() {
+            let text = String::from_utf8_lossy(body.as_slice());
+            bail!(
+                "status error {}, response: {text:?}",
+                response.status().as_u16()
+            );
+        }
+
+        let Some(content_type) = response.headers().get("content-type") else {
+            bail!("missing Content-Type header");
+        };
+        let content_type = content_type
+            .to_str()
+            .context("invalid Content-Type header")?;
+
+        let content_type = if content_type.starts_with("text/plain") {
+            ContentType::Plaintext
+        } else if content_type.starts_with("application/json") {
+            ContentType::Json
+        } else {
+            ContentType::Html
+        };
+
+        match content_type {
+            ContentType::Html => {
+                let mut handlers: Vec<TagHandler> = vec![
+                    Rc::new(RefCell::new(markdown::WebpageChromeRemover)),
+                    Rc::new(RefCell::new(markdown::ParagraphHandler)),
+                    Rc::new(RefCell::new(markdown::HeadingHandler)),
+                    Rc::new(RefCell::new(markdown::ListHandler)),
+                    Rc::new(RefCell::new(markdown::TableHandler::new())),
+                    Rc::new(RefCell::new(markdown::StyledTextHandler)),
+                ];
+                if url.contains("wikipedia.org") {
+                    use html_to_markdown::structure::wikipedia;
+
+                    handlers.push(Rc::new(RefCell::new(wikipedia::WikipediaChromeRemover)));
+                    handlers.push(Rc::new(RefCell::new(wikipedia::WikipediaInfoboxHandler)));
+                    handlers.push(Rc::new(
+                        RefCell::new(wikipedia::WikipediaCodeHandler::new()),
+                    ));
+                } else {
+                    handlers.push(Rc::new(RefCell::new(markdown::CodeHandler)));
+                }
+
+                convert_html_to_markdown(&body[..], &mut handlers)
+            }
+            ContentType::Plaintext => Ok(std::str::from_utf8(&body)?.to_owned()),
+            ContentType::Json => {
+                let json: serde_json::Value = serde_json::from_slice(&body)?;
+
+                Ok(format!(
+                    "```json\n{}\n```",
+                    serde_json::to_string_pretty(&json)?
+                ))
+            }
+        }
+    }
+}
+
+impl AgentTool for FetchTool {
+    type Input = FetchToolInput;
+    type Output = String;
+
+    fn name(&self) -> SharedString {
+        "fetch".into()
+    }
+
+    fn kind(&self) -> acp::ToolKind {
+        acp::ToolKind::Fetch
+    }
+
+    fn initial_title(&self, input: Result<Self::Input, serde_json::Value>) -> SharedString {
+        match input {
+            Ok(input) => format!("Fetch {}", MarkdownEscaped(&input.url)).into(),
+            Err(_) => "Fetch URL".into(),
+        }
+    }
+
+    fn run(
+        self: Arc<Self>,
+        input: Self::Input,
+        event_stream: ToolCallEventStream,
+        cx: &mut App,
+    ) -> Task<Result<Self::Output>> {
+        let text = cx.background_spawn({
+            let http_client = self.http_client.clone();
+            async move { Self::build_message(http_client, &input.url).await }
+        });
+
+        cx.foreground_executor().spawn(async move {
+            let text = text.await?;
+            if text.trim().is_empty() {
+                bail!("no textual content found");
+            }
+
+            event_stream.update_fields(acp::ToolCallUpdateFields {
+                content: Some(vec![text.clone().into()]),
+                ..Default::default()
+            });
+
+            Ok(text)
+        })
+    }
+}

crates/assistant_tools/src/diagnostics_tool.rs

@@ -86,7 +86,7 @@ impl Tool for DiagnosticsTool {
         input: serde_json::Value,
         _request: Arc<LanguageModelRequest>,
         project: Entity<Project>,
-        action_log: Entity<ActionLog>,
+        _action_log: Entity<ActionLog>,
         _model: Arc<dyn LanguageModel>,
         _window: Option<AnyWindowHandle>,
         cx: &mut App,
@@ -159,10 +159,6 @@ impl Tool for DiagnosticsTool {
                     }
                 }
 
-                action_log.update(cx, |action_log, _cx| {
-                    action_log.checked_project_diagnostics();
-                });
-
                 if has_diagnostics {
                     Task::ready(Ok(output.into())).into()
                 } else {