editor: Trigger completions on paste

Co-authored-by: Cole Miller <cole@zed.dev>

Cargo.lock

@@ -7,6 +7,7 @@ name = "acp_thread"
 version = "0.1.0"
 dependencies = [
  "action_log",
+ "agent",
  "agent-client-protocol",
  "anyhow",
  "buffer_diff",
@@ -21,6 +22,7 @@ dependencies = [
  "markdown",
  "parking_lot",
  "project",
+ "prompt_store",
  "rand 0.8.5",
  "serde",
  "serde_json",
@@ -29,7 +31,9 @@ dependencies = [
  "tempfile",
  "terminal",
  "ui",
+ "url",
  "util",
+ "uuid",
  "workspace-hack",
 ]
 
@@ -388,6 +392,7 @@ dependencies = [
  "ui",
  "ui_input",
  "unindent",
+ "url",
  "urlencoding",
  "util",
  "uuid",

crates/acp_thread/Cargo.toml

@@ -18,6 +18,7 @@ test-support = ["gpui/test-support", "project/test-support"]
 [dependencies]
 action_log.workspace = true
 agent-client-protocol.workspace = true
+agent.workspace = true
 anyhow.workspace = true
 buffer_diff.workspace = true
 editor.workspace = true
@@ -28,13 +29,16 @@ language.workspace = true
 language_model.workspace = true
 markdown.workspace = true
 project.workspace = true
+prompt_store.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 settings.workspace = true
 smol.workspace = true
 terminal.workspace = true
 ui.workspace = true
+url.workspace = true
 util.workspace = true
+uuid.workspace = true
 workspace-hack.workspace = true
 
 [dev-dependencies]

crates/acp_thread/src/acp_thread.rs

@@ -1,13 +1,15 @@
 mod connection;
 mod diff;
+mod mention;
 mod terminal;
 
 pub use connection::*;
 pub use diff::*;
+pub use mention::*;
 pub use terminal::*;
 
 use action_log::ActionLog;
-use agent_client_protocol as acp;
+use agent_client_protocol::{self as acp};
 use anyhow::{Context as _, Result};
 use editor::Bias;
 use futures::{FutureExt, channel::oneshot, future::BoxFuture};
@@ -21,12 +23,7 @@ use std::error::Error;
 use std::fmt::Formatter;
 use std::process::ExitStatus;
 use std::rc::Rc;
-use std::{
-    fmt::Display,
-    mem,
-    path::{Path, PathBuf},
-    sync::Arc,
-};
+use std::{fmt::Display, mem, path::PathBuf, sync::Arc};
 use ui::App;
 use util::ResultExt;
 
@@ -53,38 +50,6 @@ impl UserMessage {
     }
 }
 
-#[derive(Debug)]
-pub struct MentionPath<'a>(&'a Path);
-
-impl<'a> MentionPath<'a> {
-    const PREFIX: &'static str = "@file:";
-
-    pub fn new(path: &'a Path) -> Self {
-        MentionPath(path)
-    }
-
-    pub fn try_parse(url: &'a str) -> Option<Self> {
-        let path = url.strip_prefix(Self::PREFIX)?;
-        Some(MentionPath(Path::new(path)))
-    }
-
-    pub fn path(&self) -> &Path {
-        self.0
-    }
-}
-
-impl Display for MentionPath<'_> {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(
-            f,
-            "[@{}]({}{})",
-            self.0.file_name().unwrap_or_default().display(),
-            Self::PREFIX,
-            self.0.display()
-        )
-    }
-}
-
 #[derive(Debug, PartialEq)]
 pub struct AssistantMessage {
     pub chunks: Vec<AssistantMessageChunk>,
@@ -367,16 +332,24 @@ impl ContentBlock {
     ) {
         let new_content = match block {
             acp::ContentBlock::Text(text_content) => text_content.text.clone(),
-            acp::ContentBlock::ResourceLink(resource_link) => {
-                if let Some(path) = resource_link.uri.strip_prefix("file://") {
-                    format!("{}", MentionPath(path.as_ref()))
+            acp::ContentBlock::Resource(acp::EmbeddedResource {
+                resource:
+                    acp::EmbeddedResourceResource::TextResourceContents(acp::TextResourceContents {
+                        uri,
+                        ..
+                    }),
+                ..
+            }) => {
+                if let Some(uri) = MentionUri::parse(&uri).log_err() {
+                    uri.as_link().to_string()
                 } else {
-                    resource_link.uri.clone()
+                    uri.clone()
                 }
             }
             acp::ContentBlock::Image(_)
             | acp::ContentBlock::Audio(_)
-            | acp::ContentBlock::Resource(_) => String::new(),
+            | acp::ContentBlock::Resource(acp::EmbeddedResource { .. })
+            | acp::ContentBlock::ResourceLink(_) => String::new(),
         };
 
         match self {
@@ -1329,7 +1302,7 @@ mod tests {
     use serde_json::json;
     use settings::SettingsStore;
     use smol::stream::StreamExt as _;
-    use std::{cell::RefCell, rc::Rc, time::Duration};
+    use std::{cell::RefCell, path::Path, rc::Rc, time::Duration};
 
     use util::path;
 

crates/acp_thread/src/mention.rs

@@ -0,0 +1,368 @@
+use agent::ThreadId;
+use anyhow::{Context as _, Result, bail};
+use prompt_store::{PromptId, UserPromptId};
+use std::{
+    fmt,
+    ops::Range,
+    path::{Path, PathBuf},
+};
+use url::Url;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum MentionUri {
+    File(PathBuf),
+    Symbol {
+        path: PathBuf,
+        name: String,
+        line_range: Range<u32>,
+    },
+    Thread {
+        id: ThreadId,
+        name: String,
+    },
+    TextThread {
+        path: PathBuf,
+        name: String,
+    },
+    Rule {
+        id: PromptId,
+        name: String,
+    },
+    Selection {
+        path: PathBuf,
+        line_range: Range<u32>,
+    },
+    Fetch {
+        url: Url,
+    },
+}
+
+impl MentionUri {
+    pub fn parse(input: &str) -> Result<Self> {
+        let url = url::Url::parse(input)?;
+        let path = url.path();
+        match url.scheme() {
+            "file" => {
+                if let Some(fragment) = url.fragment() {
+                    let range = fragment
+                        .strip_prefix("L")
+                        .context("Line range must start with \"L\"")?;
+                    let (start, end) = range
+                        .split_once(":")
+                        .context("Line range must use colon as separator")?;
+                    let line_range = start
+                        .parse::<u32>()
+                        .context("Parsing line range start")?
+                        .checked_sub(1)
+                        .context("Line numbers should be 1-based")?
+                        ..end
+                            .parse::<u32>()
+                            .context("Parsing line range end")?
+                            .checked_sub(1)
+                            .context("Line numbers should be 1-based")?;
+                    if let Some(name) = single_query_param(&url, "symbol")? {
+                        Ok(Self::Symbol {
+                            name,
+                            path: path.into(),
+                            line_range,
+                        })
+                    } else {
+                        Ok(Self::Selection {
+                            path: path.into(),
+                            line_range,
+                        })
+                    }
+                } else {
+                    Ok(Self::File(path.into()))
+                }
+            }
+            "zed" => {
+                if let Some(thread_id) = path.strip_prefix("/agent/thread/") {
+                    let name = single_query_param(&url, "name")?.context("Missing thread name")?;
+                    Ok(Self::Thread {
+                        id: thread_id.into(),
+                        name,
+                    })
+                } else if let Some(path) = path.strip_prefix("/agent/text-thread/") {
+                    let name = single_query_param(&url, "name")?.context("Missing thread name")?;
+                    Ok(Self::TextThread {
+                        path: path.into(),
+                        name,
+                    })
+                } else if let Some(rule_id) = path.strip_prefix("/agent/rule/") {
+                    let name = single_query_param(&url, "name")?.context("Missing rule name")?;
+                    let rule_id = UserPromptId(rule_id.parse()?);
+                    Ok(Self::Rule {
+                        id: rule_id.into(),
+                        name,
+                    })
+                } else {
+                    bail!("invalid zed url: {:?}", input);
+                }
+            }
+            "http" | "https" => Ok(MentionUri::Fetch { url }),
+            other => bail!("unrecognized scheme {:?}", other),
+        }
+    }
+
+    fn name(&self) -> String {
+        match self {
+            MentionUri::File(path) => path
+                .file_name()
+                .unwrap_or_default()
+                .to_string_lossy()
+                .into_owned(),
+            MentionUri::Symbol { name, .. } => name.clone(),
+            MentionUri::Thread { name, .. } => name.clone(),
+            MentionUri::TextThread { name, .. } => name.clone(),
+            MentionUri::Rule { name, .. } => name.clone(),
+            MentionUri::Selection {
+                path, line_range, ..
+            } => selection_name(path, line_range),
+            MentionUri::Fetch { url } => url.to_string(),
+        }
+    }
+
+    pub fn as_link<'a>(&'a self) -> MentionLink<'a> {
+        MentionLink(self)
+    }
+
+    pub fn to_uri(&self) -> Url {
+        match self {
+            MentionUri::File(path) => {
+                let mut url = Url::parse("file:///").unwrap();
+                url.set_path(&path.to_string_lossy());
+                url
+            }
+            MentionUri::Symbol {
+                path,
+                name,
+                line_range,
+            } => {
+                let mut url = Url::parse("file:///").unwrap();
+                url.set_path(&path.to_string_lossy());
+                url.query_pairs_mut().append_pair("symbol", name);
+                url.set_fragment(Some(&format!(
+                    "L{}:{}",
+                    line_range.start + 1,
+                    line_range.end + 1
+                )));
+                url
+            }
+            MentionUri::Selection { path, line_range } => {
+                let mut url = Url::parse("file:///").unwrap();
+                url.set_path(&path.to_string_lossy());
+                url.set_fragment(Some(&format!(
+                    "L{}:{}",
+                    line_range.start + 1,
+                    line_range.end + 1
+                )));
+                url
+            }
+            MentionUri::Thread { name, id } => {
+                let mut url = Url::parse("zed:///").unwrap();
+                url.set_path(&format!("/agent/thread/{id}"));
+                url.query_pairs_mut().append_pair("name", name);
+                url
+            }
+            MentionUri::TextThread { path, name } => {
+                let mut url = Url::parse("zed:///").unwrap();
+                url.set_path(&format!("/agent/text-thread/{}", path.to_string_lossy()));
+                url.query_pairs_mut().append_pair("name", name);
+                url
+            }
+            MentionUri::Rule { name, id } => {
+                let mut url = Url::parse("zed:///").unwrap();
+                url.set_path(&format!("/agent/rule/{id}"));
+                url.query_pairs_mut().append_pair("name", name);
+                url
+            }
+            MentionUri::Fetch { url } => url.clone(),
+        }
+    }
+}
+
+pub struct MentionLink<'a>(&'a MentionUri);
+
+impl fmt::Display for MentionLink<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "[@{}]({})", self.0.name(), self.0.to_uri())
+    }
+}
+
+fn single_query_param(url: &Url, name: &'static str) -> Result<Option<String>> {
+    let pairs = url.query_pairs().collect::<Vec<_>>();
+    match pairs.as_slice() {
+        [] => Ok(None),
+        [(k, v)] => {
+            if k != name {
+                bail!("invalid query parameter")
+            }
+
+            Ok(Some(v.to_string()))
+        }
+        _ => bail!("too many query pairs"),
+    }
+}
+
+pub fn selection_name(path: &Path, line_range: &Range<u32>) -> String {
+    format!(
+        "{} ({}:{})",
+        path.file_name().unwrap_or_default().display(),
+        line_range.start + 1,
+        line_range.end + 1
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_file_uri() {
+        let file_uri = "file:///path/to/file.rs";
+        let parsed = MentionUri::parse(file_uri).unwrap();
+        match &parsed {
+            MentionUri::File(path) => assert_eq!(path.to_str().unwrap(), "/path/to/file.rs"),
+            _ => panic!("Expected File variant"),
+        }
+        assert_eq!(parsed.to_uri().to_string(), file_uri);
+    }
+
+    #[test]
+    fn test_parse_symbol_uri() {
+        let symbol_uri = "file:///path/to/file.rs?symbol=MySymbol#L10:20";
+        let parsed = MentionUri::parse(symbol_uri).unwrap();
+        match &parsed {
+            MentionUri::Symbol {
+                path,
+                name,
+                line_range,
+            } => {
+                assert_eq!(path.to_str().unwrap(), "/path/to/file.rs");
+                assert_eq!(name, "MySymbol");
+                assert_eq!(line_range.start, 9);
+                assert_eq!(line_range.end, 19);
+            }
+            _ => panic!("Expected Symbol variant"),
+        }
+        assert_eq!(parsed.to_uri().to_string(), symbol_uri);
+    }
+
+    #[test]
+    fn test_parse_selection_uri() {
+        let selection_uri = "file:///path/to/file.rs#L5:15";
+        let parsed = MentionUri::parse(selection_uri).unwrap();
+        match &parsed {
+            MentionUri::Selection { path, line_range } => {
+                assert_eq!(path.to_str().unwrap(), "/path/to/file.rs");
+                assert_eq!(line_range.start, 4);
+                assert_eq!(line_range.end, 14);
+            }
+            _ => panic!("Expected Selection variant"),
+        }
+        assert_eq!(parsed.to_uri().to_string(), selection_uri);
+    }
+
+    #[test]
+    fn test_parse_thread_uri() {
+        let thread_uri = "zed:///agent/thread/session123?name=Thread%20name";
+        let parsed = MentionUri::parse(thread_uri).unwrap();
+        match &parsed {
+            MentionUri::Thread {
+                id: thread_id,
+                name,
+            } => {
+                assert_eq!(thread_id.to_string(), "session123");
+                assert_eq!(name, "Thread name");
+            }
+            _ => panic!("Expected Thread variant"),
+        }
+        assert_eq!(parsed.to_uri().to_string(), thread_uri);
+    }
+
+    #[test]
+    fn test_parse_rule_uri() {
+        let rule_uri = "zed:///agent/rule/d8694ff2-90d5-4b6f-be33-33c1763acd52?name=Some%20rule";
+        let parsed = MentionUri::parse(rule_uri).unwrap();
+        match &parsed {
+            MentionUri::Rule { id, name } => {
+                assert_eq!(id.to_string(), "d8694ff2-90d5-4b6f-be33-33c1763acd52");
+                assert_eq!(name, "Some rule");
+            }
+            _ => panic!("Expected Rule variant"),
+        }
+        assert_eq!(parsed.to_uri().to_string(), rule_uri);
+    }
+
+    #[test]
+    fn test_parse_fetch_http_uri() {
+        let http_uri = "http://example.com/path?query=value#fragment";
+        let parsed = MentionUri::parse(http_uri).unwrap();
+        match &parsed {
+            MentionUri::Fetch { url } => {
+                assert_eq!(url.to_string(), http_uri);
+            }
+            _ => panic!("Expected Fetch variant"),
+        }
+        assert_eq!(parsed.to_uri().to_string(), http_uri);
+    }
+
+    #[test]
+    fn test_parse_fetch_https_uri() {
+        let https_uri = "https://example.com/api/endpoint";
+        let parsed = MentionUri::parse(https_uri).unwrap();
+        match &parsed {
+            MentionUri::Fetch { url } => {
+                assert_eq!(url.to_string(), https_uri);
+            }
+            _ => panic!("Expected Fetch variant"),
+        }
+        assert_eq!(parsed.to_uri().to_string(), https_uri);
+    }
+
+    #[test]
+    fn test_invalid_scheme() {
+        assert!(MentionUri::parse("ftp://example.com").is_err());
+        assert!(MentionUri::parse("ssh://example.com").is_err());
+        assert!(MentionUri::parse("unknown://example.com").is_err());
+    }
+
+    #[test]
+    fn test_invalid_zed_path() {
+        assert!(MentionUri::parse("zed:///invalid/path").is_err());
+        assert!(MentionUri::parse("zed:///agent/unknown/test").is_err());
+    }
+
+    #[test]
+    fn test_invalid_line_range_format() {
+        // Missing L prefix
+        assert!(MentionUri::parse("file:///path/to/file.rs#10:20").is_err());
+
+        // Missing colon separator
+        assert!(MentionUri::parse("file:///path/to/file.rs#L1020").is_err());
+
+        // Invalid numbers
+        assert!(MentionUri::parse("file:///path/to/file.rs#L10:abc").is_err());
+        assert!(MentionUri::parse("file:///path/to/file.rs#Labc:20").is_err());
+    }
+
+    #[test]
+    fn test_invalid_query_parameters() {
+        // Invalid query parameter name
+        assert!(MentionUri::parse("file:///path/to/file.rs#L10:20?invalid=test").is_err());
+
+        // Too many query parameters
+        assert!(
+            MentionUri::parse("file:///path/to/file.rs#L10:20?symbol=test&another=param").is_err()
+        );
+    }
+
+    #[test]
+    fn test_zero_based_line_numbers() {
+        // Test that 0-based line numbers are rejected (should be 1-based)
+        assert!(MentionUri::parse("file:///path/to/file.rs#L0:10").is_err());
+        assert!(MentionUri::parse("file:///path/to/file.rs#L1:0").is_err());
+        assert!(MentionUri::parse("file:///path/to/file.rs#L0:0").is_err());
+    }
+}

crates/agent/src/thread_store.rs

@@ -205,6 +205,22 @@ impl ThreadStore {
         (this, ready_rx)
     }
 
+    #[cfg(any(test, feature = "test-support"))]
+    pub fn fake(project: Entity<Project>, cx: &mut App) -> Self {
+        Self {
+            project,
+            tools: cx.new(|_| ToolWorkingSet::default()),
+            prompt_builder: Arc::new(PromptBuilder::new(None).unwrap()),
+            prompt_store: None,
+            context_server_tool_ids: HashMap::default(),
+            threads: Vec::new(),
+            project_context: SharedProjectContext::default(),
+            reload_system_prompt_tx: mpsc::channel(0).0,
+            _reload_system_prompt_task: Task::ready(()),
+            _subscriptions: vec![],
+        }
+    }
+
     fn handle_project_event(
         &mut self,
         _project: Entity<Project>,

crates/agent2/src/agent.rs

@@ -1,8 +1,8 @@
 use crate::{AgentResponseEvent, Thread, templates::Templates};
 use crate::{
     ContextServerRegistry, CopyPathTool, CreateDirectoryTool, DiagnosticsTool, EditFileTool,
-    FetchTool, FindPathTool, GrepTool, ListDirectoryTool, MovePathTool, NowTool, OpenTool,
-    ReadFileTool, TerminalTool, ThinkingTool, ToolCallAuthorization, WebSearchTool,
+    FetchTool, FindPathTool, GrepTool, ListDirectoryTool, MessageContent, MovePathTool, NowTool,
+    OpenTool, ReadFileTool, TerminalTool, ThinkingTool, ToolCallAuthorization, WebSearchTool,
 };
 use acp_thread::ModelSelector;
 use agent_client_protocol as acp;
@@ -516,10 +516,13 @@ impl acp_thread::AgentConnection for NativeAgentConnection {
                 })?;
             log::debug!("Found session for: {}", session_id);
 
-            // Convert prompt to message
-            let message = convert_prompt_to_message(params.prompt);
+            let message: Vec<MessageContent> = params
+                .prompt
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>();
             log::info!("Converted prompt to message: {} chars", message.len());
-            log::debug!("Message content: {}", message);
+            log::debug!("Message content: {:?}", message);
 
             // Get model using the ModelSelector capability (always available for agent2)
             // Get the selected model from the thread directly
@@ -623,39 +626,6 @@ impl acp_thread::AgentConnection for NativeAgentConnection {
     }
 }
 
-/// Convert ACP content blocks to a message string
-fn convert_prompt_to_message(blocks: Vec<acp::ContentBlock>) -> String {
-    log::debug!("Converting {} content blocks to message", blocks.len());
-    let mut message = String::new();
-
-    for block in blocks {
-        match block {
-            acp::ContentBlock::Text(text) => {
-                log::trace!("Processing text block: {} chars", text.text.len());
-                message.push_str(&text.text);
-            }
-            acp::ContentBlock::ResourceLink(link) => {
-                log::trace!("Processing resource link: {}", link.uri);
-                message.push_str(&format!(" @{} ", link.uri));
-            }
-            acp::ContentBlock::Image(_) => {
-                log::trace!("Processing image block");
-                message.push_str(" [image] ");
-            }
-            acp::ContentBlock::Audio(_) => {
-                log::trace!("Processing audio block");
-                message.push_str(" [audio] ");
-            }
-            acp::ContentBlock::Resource(resource) => {
-                log::trace!("Processing resource block: {:?}", resource.resource);
-                message.push_str(&format!(" [resource: {:?}] ", resource.resource));
-            }
-        }
-    }
-
-    message
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;

crates/agent2/src/tests/mod.rs

@@ -1,4 +1,5 @@
 use super::*;
+use crate::MessageContent;
 use acp_thread::AgentConnection;
 use action_log::ActionLog;
 use agent_client_protocol::{self as acp};
@@ -13,8 +14,8 @@ use gpui::{
 use indoc::indoc;
 use language_model::{
     LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent, LanguageModelId,
-    LanguageModelRegistry, LanguageModelToolResult, LanguageModelToolUse, MessageContent, Role,
-    StopReason, fake_provider::FakeLanguageModel,
+    LanguageModelRegistry, LanguageModelToolResult, LanguageModelToolUse, Role, StopReason,
+    fake_provider::FakeLanguageModel,
 };
 use project::Project;
 use prompt_store::ProjectContext;
@@ -272,14 +273,14 @@ async fn test_tool_authorization(cx: &mut TestAppContext) {
     assert_eq!(
         message.content,
         vec![
-            MessageContent::ToolResult(LanguageModelToolResult {
+            language_model::MessageContent::ToolResult(LanguageModelToolResult {
                 tool_use_id: tool_call_auth_1.tool_call.id.0.to_string().into(),
                 tool_name: ToolRequiringPermission.name().into(),
                 is_error: false,
                 content: "Allowed".into(),
                 output: Some("Allowed".into())
             }),
-            MessageContent::ToolResult(LanguageModelToolResult {
+            language_model::MessageContent::ToolResult(LanguageModelToolResult {
                 tool_use_id: tool_call_auth_2.tool_call.id.0.to_string().into(),
                 tool_name: ToolRequiringPermission.name().into(),
                 is_error: true,
@@ -312,13 +313,15 @@ async fn test_tool_authorization(cx: &mut TestAppContext) {
     let message = completion.messages.last().unwrap();
     assert_eq!(
         message.content,
-        vec![MessageContent::ToolResult(LanguageModelToolResult {
+        vec![language_model::MessageContent::ToolResult(
+            LanguageModelToolResult {
                 tool_use_id: tool_call_auth_3.tool_call.id.0.to_string().into(),
                 tool_name: ToolRequiringPermission.name().into(),
                 is_error: false,
                 content: "Allowed".into(),
                 output: Some("Allowed".into())
-        })]
+            }
+        )]
     );
 
     // Simulate a final tool call, ensuring we don't trigger authorization.
@@ -337,13 +340,15 @@ async fn test_tool_authorization(cx: &mut TestAppContext) {
     let message = completion.messages.last().unwrap();
     assert_eq!(
         message.content,
-        vec![MessageContent::ToolResult(LanguageModelToolResult {
+        vec![language_model::MessageContent::ToolResult(
+            LanguageModelToolResult {
                 tool_use_id: "tool_id_4".into(),
                 tool_name: ToolRequiringPermission.name().into(),
                 is_error: false,
                 content: "Allowed".into(),
                 output: Some("Allowed".into())
-        })]
+            }
+        )]
     );
 }
 

crates/agent2/src/thread.rs

@@ -1,4 +1,5 @@
 use crate::{ContextServerRegistry, SystemPromptTemplate, Template, Templates};
+use acp_thread::MentionUri;
 use action_log::ActionLog;
 use agent_client_protocol as acp;
 use agent_settings::{AgentProfileId, AgentSettings};
@@ -13,10 +14,10 @@ use futures::{
 };
 use gpui::{App, Context, Entity, SharedString, Task};
 use language_model::{
-    LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
+    LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent, LanguageModelImage,
     LanguageModelRequest, LanguageModelRequestMessage, LanguageModelRequestTool,
     LanguageModelToolResult, LanguageModelToolResultContent, LanguageModelToolSchemaFormat,
-    LanguageModelToolUse, LanguageModelToolUseId, MessageContent, Role, StopReason,
+    LanguageModelToolUse, LanguageModelToolUseId, Role, StopReason,
 };
 use log;
 use project::Project;
@@ -25,7 +26,8 @@ use schemars::{JsonSchema, Schema};
 use serde::{Deserialize, Serialize};
 use settings::{Settings, update_settings_file};
 use smol::stream::StreamExt;
-use std::{cell::RefCell, collections::BTreeMap, fmt::Write, rc::Rc, sync::Arc};
+use std::{cell::RefCell, collections::BTreeMap, path::Path, rc::Rc, sync::Arc};
+use std::{fmt::Write, ops::Range};
 use util::{ResultExt, markdown::MarkdownCodeBlock};
 
 #[derive(Debug, Clone)]
@@ -34,6 +36,23 @@ pub struct AgentMessage {
     pub content: Vec<MessageContent>,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum MessageContent {
+    Text(String),
+    Thinking {
+        text: String,
+        signature: Option<String>,
+    },
+    Mention {
+        uri: MentionUri,
+        content: String,
+    },
+    RedactedThinking(String),
+    Image(LanguageModelImage),
+    ToolUse(LanguageModelToolUse),
+    ToolResult(LanguageModelToolResult),
+}
+
 impl AgentMessage {
     pub fn to_markdown(&self) -> String {
         let mut markdown = format!("## {}\n", self.role);
@@ -93,6 +112,9 @@ impl AgentMessage {
                         .unwrap();
                     }
                 }
+                MessageContent::Mention { uri, .. } => {
+                    write!(markdown, "{}", uri.as_link()).ok();
+                }
             }
         }
 
@@ -214,10 +236,11 @@ impl Thread {
     /// The returned channel will report all the occurrences in which the model stops before erroring or ending its turn.
     pub fn send(
         &mut self,
-        content: impl Into<MessageContent>,
+        content: impl Into<UserMessage>,
         cx: &mut Context<Self>,
     ) -> mpsc::UnboundedReceiver<Result<AgentResponseEvent, LanguageModelCompletionError>> {
-        let content = content.into();
+        let content = content.into().0;
+
         let model = self.selected_model.clone();
         log::info!("Thread::send called with model: {:?}", model.name());
         log::debug!("Thread::send content: {:?}", content);
@@ -230,7 +253,7 @@ impl Thread {
         let user_message_ix = self.messages.len();
         self.messages.push(AgentMessage {
             role: Role::User,
-            content: vec![content],
+            content,
         });
         log::info!("Total messages in thread: {}", self.messages.len());
         self.running_turn = Some(cx.spawn(async move |thread, cx| {
@@ -353,7 +376,7 @@ impl Thread {
         log::debug!("System message built");
         AgentMessage {
             role: Role::System,
-            content: vec![prompt.into()],
+            content: vec![prompt.as_str().into()],
         }
     }
 
@@ -701,11 +724,7 @@ impl Thread {
                     },
                     message.content.len()
                 );
-                LanguageModelRequestMessage {
-                    role: message.role,
-                    content: message.content.clone(),
-                    cache: false,
-                }
+                message.to_request()
             })
             .collect();
         messages
@@ -720,6 +739,20 @@ impl Thread {
     }
 }
 
+pub struct UserMessage(Vec<MessageContent>);
+
+impl From<Vec<MessageContent>> for UserMessage {
+    fn from(content: Vec<MessageContent>) -> Self {
+        UserMessage(content)
+    }
+}
+
+impl<T: Into<MessageContent>> From<T> for UserMessage {
+    fn from(content: T) -> Self {
+        UserMessage(vec![content.into()])
+    }
+}
+
 pub trait AgentTool
 where
     Self: 'static + Sized,
@@ -1102,3 +1135,246 @@ impl std::ops::DerefMut for ToolCallEventStreamReceiver {
         &mut self.0
     }
 }
+
+impl AgentMessage {
+    fn to_request(&self) -> language_model::LanguageModelRequestMessage {
+        let mut message = LanguageModelRequestMessage {
+            role: self.role,
+            content: Vec::with_capacity(self.content.len()),
+            cache: false,
+        };
+
+        const OPEN_CONTEXT: &str = "<context>\n\
+            The following items were attached by the user. \
+            They are up-to-date and don't need to be re-read.\n\n";
+
+        const OPEN_FILES_TAG: &str = "<files>";
+        const OPEN_SYMBOLS_TAG: &str = "<symbols>";
+        const OPEN_THREADS_TAG: &str = "<threads>";
+        const OPEN_FETCH_TAG: &str = "<fetched_urls>";
+        const OPEN_RULES_TAG: &str =
+            "<rules>\nThe user has specified the following rules that should be applied:\n";
+
+        let mut file_context = OPEN_FILES_TAG.to_string();
+        let mut symbol_context = OPEN_SYMBOLS_TAG.to_string();
+        let mut thread_context = OPEN_THREADS_TAG.to_string();
+        let mut fetch_context = OPEN_FETCH_TAG.to_string();
+        let mut rules_context = OPEN_RULES_TAG.to_string();
+
+        for chunk in &self.content {
+            let chunk = match chunk {
+                MessageContent::Text(text) => language_model::MessageContent::Text(text.clone()),
+                MessageContent::Thinking { text, signature } => {
+                    language_model::MessageContent::Thinking {
+                        text: text.clone(),
+                        signature: signature.clone(),
+                    }
+                }
+                MessageContent::RedactedThinking(value) => {
+                    language_model::MessageContent::RedactedThinking(value.clone())
+                }
+                MessageContent::ToolUse(value) => {
+                    language_model::MessageContent::ToolUse(value.clone())
+                }
+                MessageContent::ToolResult(value) => {
+                    language_model::MessageContent::ToolResult(value.clone())
+                }
+                MessageContent::Image(value) => {
+                    language_model::MessageContent::Image(value.clone())
+                }
+                MessageContent::Mention { uri, content } => {
+                    match uri {
+                        MentionUri::File(path) => {
+                            write!(
+                                &mut symbol_context,
+                                "\n{}",
+                                MarkdownCodeBlock {
+                                    tag: &codeblock_tag(&path, None),
+                                    text: &content.to_string(),
+                                }
+                            )
+                            .ok();
+                        }
+                        MentionUri::Symbol {
+                            path, line_range, ..
+                        }
+                        | MentionUri::Selection {
+                            path, line_range, ..
+                        } => {
+                            write!(
+                                &mut rules_context,
+                                "\n{}",
+                                MarkdownCodeBlock {
+                                    tag: &codeblock_tag(&path, Some(line_range)),
+                                    text: &content
+                                }
+                            )
+                            .ok();
+                        }
+                        MentionUri::Thread { .. } => {
+                            write!(&mut thread_context, "\n{}\n", content).ok();
+                        }
+                        MentionUri::TextThread { .. } => {
+                            write!(&mut thread_context, "\n{}\n", content).ok();
+                        }
+                        MentionUri::Rule { .. } => {
+                            write!(
+                                &mut rules_context,
+                                "\n{}",
+                                MarkdownCodeBlock {
+                                    tag: "",
+                                    text: &content
+                                }
+                            )
+                            .ok();
+                        }
+                        MentionUri::Fetch { url } => {
+                            write!(&mut fetch_context, "\nFetch: {}\n\n{}", url, content).ok();
+                        }
+                    }
+
+                    language_model::MessageContent::Text(uri.as_link().to_string())
+                }
+            };
+
+            message.content.push(chunk);
+        }
+
+        let len_before_context = message.content.len();
+
+        if file_context.len() > OPEN_FILES_TAG.len() {
+            file_context.push_str("</files>\n");
+            message
+                .content
+                .push(language_model::MessageContent::Text(file_context));
+        }
+
+        if symbol_context.len() > OPEN_SYMBOLS_TAG.len() {
+            symbol_context.push_str("</symbols>\n");
+            message
+                .content
+                .push(language_model::MessageContent::Text(symbol_context));
+        }
+
+        if thread_context.len() > OPEN_THREADS_TAG.len() {
+            thread_context.push_str("</threads>\n");
+            message
+                .content
+                .push(language_model::MessageContent::Text(thread_context));
+        }
+
+        if fetch_context.len() > OPEN_FETCH_TAG.len() {
+            fetch_context.push_str("</fetched_urls>\n");
+            message
+                .content
+                .push(language_model::MessageContent::Text(fetch_context));
+        }
+
+        if rules_context.len() > OPEN_RULES_TAG.len() {
+            rules_context.push_str("</user_rules>\n");
+            message
+                .content
+                .push(language_model::MessageContent::Text(rules_context));
+        }
+
+        if message.content.len() > len_before_context {
+            message.content.insert(
+                len_before_context,
+                language_model::MessageContent::Text(OPEN_CONTEXT.into()),
+            );
+            message
+                .content
+                .push(language_model::MessageContent::Text("</context>".into()));
+        }
+
+        message
+    }
+}
+
+fn codeblock_tag(full_path: &Path, line_range: Option<&Range<u32>>) -> String {
+    let mut result = String::new();
+
+    if let Some(extension) = full_path.extension().and_then(|ext| ext.to_str()) {
+        let _ = write!(result, "{} ", extension);
+    }
+
+    let _ = write!(result, "{}", full_path.display());
+
+    if let Some(range) = line_range {
+        if range.start == range.end {
+            let _ = write!(result, ":{}", range.start + 1);
+        } else {
+            let _ = write!(result, ":{}-{}", range.start + 1, range.end + 1);
+        }
+    }
+
+    result
+}
+
+impl From<acp::ContentBlock> for MessageContent {
+    fn from(value: acp::ContentBlock) -> Self {
+        match value {
+            acp::ContentBlock::Text(text_content) => MessageContent::Text(text_content.text),
+            acp::ContentBlock::Image(image_content) => {
+                MessageContent::Image(convert_image(image_content))
+            }
+            acp::ContentBlock::Audio(_) => {
+                // TODO
+                MessageContent::Text("[audio]".to_string())
+            }
+            acp::ContentBlock::ResourceLink(resource_link) => {
+                match MentionUri::parse(&resource_link.uri) {
+                    Ok(uri) => Self::Mention {
+                        uri,
+                        content: String::new(),
+                    },
+                    Err(err) => {
+                        log::error!("Failed to parse mention link: {}", err);
+                        MessageContent::Text(format!(
+                            "[{}]({})",
+                            resource_link.name, resource_link.uri
+                        ))
+                    }
+                }
+            }
+            acp::ContentBlock::Resource(resource) => match resource.resource {
+                acp::EmbeddedResourceResource::TextResourceContents(resource) => {
+                    match MentionUri::parse(&resource.uri) {
+                        Ok(uri) => Self::Mention {
+                            uri,
+                            content: resource.text,
+                        },
+                        Err(err) => {
+                            log::error!("Failed to parse mention link: {}", err);
+                            MessageContent::Text(
+                                MarkdownCodeBlock {
+                                    tag: &resource.uri,
+                                    text: &resource.text,
+                                }
+                                .to_string(),
+                            )
+                        }
+                    }
+                }
+                acp::EmbeddedResourceResource::BlobResourceContents(_) => {
+                    // TODO
+                    MessageContent::Text("[blob]".to_string())
+                }
+            },
+        }
+    }
+}
+
+fn convert_image(image_content: acp::ImageContent) -> LanguageModelImage {
+    LanguageModelImage {
+        source: image_content.data.into(),
+        // TODO: make this optional?
+        size: gpui::Size::new(0.into(), 0.into()),
+    }
+}
+
+impl From<&str> for MessageContent {
+    fn from(text: &str) -> Self {
+        MessageContent::Text(text.into())
+    }
+}

crates/agent_ui/Cargo.toml

@@ -93,6 +93,7 @@ time.workspace = true
 time_format.workspace = true
 ui.workspace = true
 ui_input.workspace = true
+url.workspace = true
 urlencoding.workspace = true
 util.workspace = true
 uuid.workspace = true
@@ -102,6 +103,8 @@ workspace.workspace = true
 zed_actions.workspace = true
 
 [dev-dependencies]
+agent = { workspace = true, features = ["test-support"] }
+assistant_context = { workspace = true, features = ["test-support"] }
 assistant_tools.workspace = true
 buffer_diff = { workspace = true, features = ["test-support"] }
 editor = { workspace = true, features = ["test-support"] }

crates/agent_ui/src/acp/thread_view.rs

@@ -1,18 +1,20 @@
 use acp_thread::{
     AcpThread, AcpThreadEvent, AgentThreadEntry, AssistantMessage, AssistantMessageChunk,
-    LoadError, MentionPath, ThreadStatus, ToolCall, ToolCallContent, ToolCallStatus,
+    LoadError, MentionUri, ThreadStatus, ToolCall, ToolCallContent, ToolCallStatus,
 };
 use acp_thread::{AgentConnection, Plan};
 use action_log::ActionLog;
+use agent::{TextThreadStore, ThreadStore};
 use agent_client_protocol as acp;
 use agent_servers::AgentServer;
 use agent_settings::{AgentSettings, NotifyWhenAgentWaiting};
 use audio::{Audio, Sound};
 use buffer_diff::BufferDiff;
 use collections::{HashMap, HashSet};
+use editor::scroll::Autoscroll;
 use editor::{
     AnchorRangeExt, ContextMenuOptions, ContextMenuPlacement, Editor, EditorElement, EditorMode,
-    EditorStyle, MinimapVisibility, MultiBuffer, PathKey,
+    EditorStyle, MinimapVisibility, MultiBuffer, PathKey, SelectionEffects,
 };
 use file_icons::FileIcons;
 use gpui::{
@@ -27,7 +29,11 @@ use language::{Buffer, Language};
 use markdown::{HeadingLevelStyles, Markdown, MarkdownElement, MarkdownStyle};
 use parking_lot::Mutex;
 use project::{CompletionIntent, Project};
+use prompt_store::PromptId;
+use rope::Point;
 use settings::{Settings as _, SettingsStore};
+use std::fmt::Write as _;
+use std::path::PathBuf;
 use std::{
     cell::RefCell, collections::BTreeMap, path::Path, process::ExitStatus, rc::Rc, sync::Arc,
     time::Duration,
@@ -41,6 +47,7 @@ use ui::{
 use util::{ResultExt, size::format_file_size, time::duration_alt_display};
 use workspace::{CollaboratorId, Workspace};
 use zed_actions::agent::{Chat, NextHistoryMessage, PreviousHistoryMessage};
+use zed_actions::assistant::OpenRulesLibrary;
 
 use crate::acp::completion_provider::{ContextPickerCompletionProvider, MentionSet};
 use crate::acp::message_history::MessageHistory;
@@ -57,6 +64,8 @@ pub struct AcpThreadView {
     agent: Rc<dyn AgentServer>,
     workspace: WeakEntity<Workspace>,
     project: Entity<Project>,
+    thread_store: WeakEntity<ThreadStore>,
+    text_thread_store: WeakEntity<TextThreadStore>,
     thread_state: ThreadState,
     diff_editors: HashMap<EntityId, Entity<Editor>>,
     terminal_views: HashMap<EntityId, Entity<TerminalView>>,
@@ -103,6 +112,8 @@ impl AcpThreadView {
         agent: Rc<dyn AgentServer>,
         workspace: WeakEntity<Workspace>,
         project: Entity<Project>,
+        thread_store: WeakEntity<ThreadStore>,
+        text_thread_store: WeakEntity<TextThreadStore>,
         message_history: Rc<RefCell<MessageHistory<Vec<acp::ContentBlock>>>>,
         min_lines: usize,
         max_lines: Option<usize>,
@@ -140,6 +151,8 @@ impl AcpThreadView {
             editor.set_completion_provider(Some(Rc::new(ContextPickerCompletionProvider::new(
                 mention_set.clone(),
                 workspace.clone(),
+                thread_store.clone(),
+                text_thread_store.clone(),
                 cx.weak_entity(),
             ))));
             editor.set_context_menu_options(ContextMenuOptions {
@@ -183,6 +196,8 @@ impl AcpThreadView {
             agent: agent.clone(),
             workspace: workspace.clone(),
             project: project.clone(),
+            thread_store,
+            text_thread_store,
             thread_state: Self::initial_state(agent, workspace, project, window, cx),
             message_editor,
             message_set_from_history: None,
@@ -376,7 +391,34 @@ impl AcpThreadView {
         let mut ix = 0;
         let mut chunks: Vec<acp::ContentBlock> = Vec::new();
         let project = self.project.clone();
-        self.message_editor.update(cx, |editor, cx| {
+
+        let Some(thread_store) = self.thread_store.upgrade() else {
+            return;
+        };
+        let Some(text_thread_store) = self.text_thread_store.upgrade() else {
+            return;
+        };
+
+        let contents =
+            self.mention_set
+                .lock()
+                .contents(project, thread_store, text_thread_store, window, cx);
+
+        cx.spawn_in(window, async move |this, cx| {
+            let contents = match contents.await {
+                Ok(contents) => contents,
+                Err(e) => {
+                    this.update(cx, |this, cx| {
+                        this.last_error =
+                            Some(cx.new(|cx| Markdown::new(e.to_string().into(), None, None, cx)));
+                    })
+                    .ok();
+                    return;
+                }
+            };
+
+            this.update_in(cx, |this, window, cx| {
+                this.message_editor.update(cx, |editor, cx| {
                     let text = editor.text(cx);
                     editor.display_map.update(cx, |map, cx| {
                         let snapshot = map.snapshot(cx);
@@ -386,25 +428,22 @@ impl AcpThreadView {
                                 continue;
                             }
 
-                    if let Some(project_path) =
-                        self.mention_set.lock().path_for_crease_id(crease_id)
-                    {
-                        let crease_range = crease.range().to_offset(&snapshot.buffer_snapshot);
+                            if let Some(mention) = contents.get(&crease_id) {
+                                let crease_range =
+                                    crease.range().to_offset(&snapshot.buffer_snapshot);
                                 if crease_range.start > ix {
                                     chunks.push(text[ix..crease_range.start].into());
                                 }
-                        if let Some(abs_path) = project.read(cx).absolute_path(&project_path, cx) {
-                            let path_str = abs_path.display().to_string();
-                            chunks.push(acp::ContentBlock::ResourceLink(acp::ResourceLink {
-                                uri: path_str.clone(),
-                                name: path_str,
+                                chunks.push(acp::ContentBlock::Resource(acp::EmbeddedResource {
                                     annotations: None,
-                                description: None,
+                                    resource: acp::EmbeddedResourceResource::TextResourceContents(
+                                        acp::TextResourceContents {
                                             mime_type: None,
-                                size: None,
-                                title: None,
+                                            text: mention.content.clone(),
+                                            uri: mention.uri.to_uri().to_string(),
+                                        },
+                                    ),
                                 }));
-                        }
                                 ix = crease_range.end;
                             }
                         }
@@ -422,7 +461,7 @@ impl AcpThreadView {
                     return;
                 }
 
-        let Some(thread) = self.thread() else {
+                let Some(thread) = this.thread() else {
                     return;
                 };
                 let task = thread.update(cx, |thread, cx| thread.send(chunks.clone(), cx));
@@ -433,24 +472,30 @@ impl AcpThreadView {
                     this.update(cx, |this, cx| {
                         if let Err(err) = result {
                             this.last_error =
-                        Some(cx.new(|cx| Markdown::new(err.to_string().into(), None, None, cx)))
+                                Some(cx.new(|cx| {
+                                    Markdown::new(err.to_string().into(), None, None, cx)
+                                }))
                         }
                     })
                 })
                 .detach();
 
-        let mention_set = self.mention_set.clone();
+                let mention_set = this.mention_set.clone();
 
-        self.set_editor_is_expanded(false, cx);
+                this.set_editor_is_expanded(false, cx);
 
-        self.message_editor.update(cx, |editor, cx| {
+                this.message_editor.update(cx, |editor, cx| {
                     editor.clear(window, cx);
                     editor.remove_creases(mention_set.lock().drain(), cx)
                 });
 
-        self.scroll_to_bottom(cx);
+                this.scroll_to_bottom(cx);
 
-        self.message_history.borrow_mut().push(chunks);
+                this.message_history.borrow_mut().push(chunks);
+            })
+            .ok();
+        })
+        .detach();
     }
 
     fn previous_history_message(
@@ -563,16 +608,18 @@ impl AcpThreadView {
                 acp::ContentBlock::Text(text_content) => {
                     text.push_str(&text_content.text);
                 }
-                acp::ContentBlock::ResourceLink(resource_link) => {
-                    let path = Path::new(&resource_link.uri);
+                acp::ContentBlock::Resource(acp::EmbeddedResource {
+                    resource: acp::EmbeddedResourceResource::TextResourceContents(resource),
+                    ..
+                }) => {
+                    let path = PathBuf::from(&resource.uri);
+                    let project_path = project.read(cx).project_path_for_absolute_path(&path, cx);
                     let start = text.len();
-                    let content = MentionPath::new(&path).to_string();
-                    text.push_str(&content);
+                    let _ = write!(&mut text, "{}", MentionUri::File(path).to_uri());
                     let end = text.len();
-                    if let Some(project_path) =
-                        project.read(cx).project_path_for_absolute_path(&path, cx)
-                    {
-                        let filename: SharedString = path
+                    if let Some(project_path) = project_path {
+                        let filename: SharedString = project_path
+                            .path
                             .file_name()
                             .unwrap_or_default()
                             .to_string_lossy()
@@ -583,7 +630,8 @@ impl AcpThreadView {
                 }
                 acp::ContentBlock::Image(_)
                 | acp::ContentBlock::Audio(_)
-                | acp::ContentBlock::Resource(_) => {}
+                | acp::ContentBlock::Resource(_)
+                | acp::ContentBlock::ResourceLink(_) => {}
             }
         }
 
@@ -602,6 +650,7 @@ impl AcpThreadView {
             };
 
             let anchor = snapshot.anchor_before(range.start);
+            if let Some(project_path) = project.read(cx).absolute_path(&project_path, cx) {
                 let crease_id = crate::context_picker::insert_crease_for_mention(
                     anchor.excerpt_id,
                     anchor.text_anchor,
@@ -612,8 +661,12 @@ impl AcpThreadView {
                     window,
                     cx,
                 );
+
                 if let Some(crease_id) = crease_id {
-                mention_set.lock().insert(crease_id, project_path);
+                    mention_set
+                        .lock()
+                        .insert(crease_id, MentionUri::File(project_path));
+                }
             }
         }
 
@@ -2562,11 +2615,12 @@ impl AcpThreadView {
             return;
         };
 
-        if let Some(mention_path) = MentionPath::try_parse(&url) {
-            workspace.update(cx, |workspace, cx| {
+        if let Some(mention) = MentionUri::parse(&url).log_err() {
+            workspace.update(cx, |workspace, cx| match mention {
+                MentionUri::File(path) => {
                     let project = workspace.project();
                     let Some((path, entry)) = project.update(cx, |project, cx| {
-                    let path = project.find_project_path(mention_path.path(), cx)?;
+                        let path = project.find_project_path(path, cx)?;
                         let entry = project.entry_for_path(&path, cx)?;
                         Some((path, entry))
                     }) else {
@@ -2582,6 +2636,74 @@ impl AcpThreadView {
                             .open_path(path, None, true, window, cx)
                             .detach_and_log_err(cx);
                     }
+                }
+                MentionUri::Symbol {
+                    path, line_range, ..
+                }
+                | MentionUri::Selection { path, line_range } => {
+                    let project = workspace.project();
+                    let Some((path, _)) = project.update(cx, |project, cx| {
+                        let path = project.find_project_path(path, cx)?;
+                        let entry = project.entry_for_path(&path, cx)?;
+                        Some((path, entry))
+                    }) else {
+                        return;
+                    };
+
+                    let item = workspace.open_path(path, None, true, window, cx);
+                    window
+                        .spawn(cx, async move |cx| {
+                            let Some(editor) = item.await?.downcast::<Editor>() else {
+                                return Ok(());
+                            };
+                            let range = Point::new(line_range.start as u32, 0)
+                                ..Point::new(line_range.start as u32, 0);
+                            editor
+                                .update_in(cx, |editor, window, cx| {
+                                    editor.change_selections(
+                                        SelectionEffects::scroll(Autoscroll::center()),
+                                        window,
+                                        cx,
+                                        |s| s.select_ranges(vec![range]),
+                                    );
+                                })
+                                .ok();
+                            anyhow::Ok(())
+                        })
+                        .detach_and_log_err(cx);
+                }
+                MentionUri::Thread { id, .. } => {
+                    if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
+                        panel.update(cx, |panel, cx| {
+                            panel
+                                .open_thread_by_id(&id, window, cx)
+                                .detach_and_log_err(cx)
+                        });
+                    }
+                }
+                MentionUri::TextThread { path, .. } => {
+                    if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
+                        panel.update(cx, |panel, cx| {
+                            panel
+                                .open_saved_prompt_editor(path.as_path().into(), window, cx)
+                                .detach_and_log_err(cx);
+                        });
+                    }
+                }
+                MentionUri::Rule { id, .. } => {
+                    let PromptId::User { uuid } = id else {
+                        return;
+                    };
+                    window.dispatch_action(
+                        Box::new(OpenRulesLibrary {
+                            prompt_to_select: Some(uuid.0),
+                        }),
+                        cx,
+                    )
+                }
+                MentionUri::Fetch { url } => {
+                    cx.open_url(url.as_str());
+                }
             })
         } else {
             cx.open_url(&url);
@@ -2966,7 +3088,7 @@ impl AcpThreadView {
                 .unwrap_or(path.path.as_os_str())
                 .display()
                 .to_string();
-            let completion = ContextPickerCompletionProvider::completion_for_path(
+            let Some(completion) = ContextPickerCompletionProvider::completion_for_path(
                 path,
                 &path_prefix,
                 false,
@@ -2975,8 +3097,11 @@ impl AcpThreadView {
                 anchor..anchor,
                 self.message_editor.clone(),
                 self.mention_set.clone(),
+                self.project.clone(),
                 cx,
-            );
+            ) else {
+                continue;
+            };
 
             self.message_editor.update(cx, |message_editor, cx| {
                 message_editor.edit(
@@ -3117,7 +3242,7 @@ fn user_message_markdown_style(window: &Window, cx: &App) -> MarkdownStyle {
 
     style.base_text_style = text_style;
     style.link_callback = Some(Rc::new(move |url, cx| {
-        if MentionPath::try_parse(url).is_some() {
+        if MentionUri::parse(url).is_ok() {
             let colors = cx.theme().colors();
             Some(TextStyleRefinement {
                 background_color: Some(colors.element_background),
@@ -3434,6 +3559,8 @@ mod tests {
                     Rc::new(agent),
                     workspace.downgrade(),
                     project,
+                    WeakEntity::new_invalid(),
+                    WeakEntity::new_invalid(),
                     Rc::new(RefCell::new(MessageHistory::default())),
                     1,
                     None,
@@ -3536,6 +3663,8 @@ mod tests {
                     Rc::new(agent),
                     workspace.downgrade(),
                     project,
+                    WeakEntity::new_invalid(),
+                    WeakEntity::new_invalid(),
                     Rc::new(RefCell::new(MessageHistory::default())),
                     1,
                     None,

crates/agent_ui/src/agent_panel.rs

@@ -924,6 +924,9 @@ impl AgentPanel {
             agent: crate::ExternalAgent,
         }
 
+        let thread_store = self.thread_store.clone();
+        let text_thread_store = self.context_store.clone();
+
         cx.spawn_in(window, async move |this, cx| {
             let server: Rc<dyn AgentServer> = match agent_choice {
                 Some(agent) => {
@@ -962,6 +965,8 @@ impl AgentPanel {
                         server,
                         workspace.clone(),
                         project,
+                        thread_store.downgrade(),
+                        text_thread_store.downgrade(),
                         message_history,
                         MIN_EDITOR_LINES,
                         Some(MAX_EDITOR_LINES),

crates/agent_ui/src/context_picker.rs

@@ -1,15 +1,16 @@
 mod completion_provider;
-mod fetch_context_picker;
+pub(crate) mod fetch_context_picker;
 pub(crate) mod file_context_picker;
-mod rules_context_picker;
-mod symbol_context_picker;
-mod thread_context_picker;
+pub(crate) mod rules_context_picker;
+pub(crate) mod symbol_context_picker;
+pub(crate) mod thread_context_picker;
 
 use std::ops::Range;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
 use anyhow::{Result, anyhow};
+use collections::HashSet;
 pub use completion_provider::ContextPickerCompletionProvider;
 use editor::display_map::{Crease, CreaseId, CreaseMetadata, FoldId};
 use editor::{Anchor, AnchorRangeExt as _, Editor, ExcerptId, FoldPlaceholder, ToOffset};
@@ -45,7 +46,7 @@ use agent::{
 };
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
-enum ContextPickerEntry {
+pub(crate) enum ContextPickerEntry {
     Mode(ContextPickerMode),
     Action(ContextPickerAction),
 }
@@ -74,7 +75,7 @@ impl ContextPickerEntry {
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
-enum ContextPickerMode {
+pub(crate) enum ContextPickerMode {
     File,
     Symbol,
     Fetch,
@@ -83,7 +84,7 @@ enum ContextPickerMode {
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
-enum ContextPickerAction {
+pub(crate) enum ContextPickerAction {
     AddSelections,
 }
 
@@ -531,7 +532,7 @@ impl ContextPicker {
             return vec![];
         };
 
-        recent_context_picker_entries(
+        recent_context_picker_entries_with_store(
             context_store,
             self.thread_store.clone(),
             self.text_thread_store.clone(),
@@ -585,7 +586,8 @@ impl Render for ContextPicker {
             })
     }
 }
-enum RecentEntry {
+
+pub(crate) enum RecentEntry {
     File {
         project_path: ProjectPath,
         path_prefix: Arc<str>,
@@ -593,7 +595,7 @@ enum RecentEntry {
     Thread(ThreadContextEntry),
 }
 
-fn available_context_picker_entries(
+pub(crate) fn available_context_picker_entries(
     prompt_store: &Option<Entity<PromptStore>>,
     thread_store: &Option<WeakEntity<ThreadStore>>,
     workspace: &Entity<Workspace>,
@@ -630,24 +632,56 @@ fn available_context_picker_entries(
     entries
 }
 
-fn recent_context_picker_entries(
+fn recent_context_picker_entries_with_store(
     context_store: Entity<ContextStore>,
     thread_store: Option<WeakEntity<ThreadStore>>,
     text_thread_store: Option<WeakEntity<TextThreadStore>>,
     workspace: Entity<Workspace>,
     exclude_path: Option<ProjectPath>,
     cx: &App,
+) -> Vec<RecentEntry> {
+    let project = workspace.read(cx).project();
+
+    let mut exclude_paths = context_store.read(cx).file_paths(cx);
+    exclude_paths.extend(exclude_path);
+
+    let exclude_paths = exclude_paths
+        .into_iter()
+        .filter_map(|project_path| project.read(cx).absolute_path(&project_path, cx))
+        .collect();
+
+    let exclude_threads = context_store.read(cx).thread_ids();
+
+    recent_context_picker_entries(
+        thread_store,
+        text_thread_store,
+        workspace,
+        &exclude_paths,
+        exclude_threads,
+        cx,
+    )
+}
+
+pub(crate) fn recent_context_picker_entries(
+    thread_store: Option<WeakEntity<ThreadStore>>,
+    text_thread_store: Option<WeakEntity<TextThreadStore>>,
+    workspace: Entity<Workspace>,
+    exclude_paths: &HashSet<PathBuf>,
+    exclude_threads: &HashSet<ThreadId>,
+    cx: &App,
 ) -> Vec<RecentEntry> {
     let mut recent = Vec::with_capacity(6);
-    let mut current_files = context_store.read(cx).file_paths(cx);
-    current_files.extend(exclude_path);
     let workspace = workspace.read(cx);
     let project = workspace.project().read(cx);
 
     recent.extend(
         workspace
             .recent_navigation_history_iter(cx)
-            .filter(|(path, _)| !current_files.contains(path))
+            .filter(|(_, abs_path)| {
+                abs_path
+                    .as_ref()
+                    .map_or(true, |path| !exclude_paths.contains(path.as_path()))
+            })
             .take(4)
             .filter_map(|(project_path, _)| {
                 project
@@ -659,8 +693,6 @@ fn recent_context_picker_entries(
             }),
     );
 
-    let current_threads = context_store.read(cx).thread_ids();
-
     let active_thread_id = workspace
         .panel::<AgentPanel>(cx)
         .and_then(|panel| Some(panel.read(cx).active_thread(cx)?.read(cx).id()));
@@ -672,7 +704,7 @@ fn recent_context_picker_entries(
         let mut threads = unordered_thread_entries(thread_store, text_thread_store, cx)
             .filter(|(_, thread)| match thread {
                 ThreadContextEntry::Thread { id, .. } => {
-                    Some(id) != active_thread_id && !current_threads.contains(id)
+                    Some(id) != active_thread_id && !exclude_threads.contains(id)
                 }
                 ThreadContextEntry::Context { .. } => true,
             })
@@ -710,7 +742,7 @@ fn add_selections_as_context(
     })
 }
 
-fn selection_ranges(
+pub(crate) fn selection_ranges(
     workspace: &Entity<Workspace>,
     cx: &mut App,
 ) -> Vec<(Entity<Buffer>, Range<text::Anchor>)> {

crates/agent_ui/src/context_picker/completion_provider.rs

@@ -35,7 +35,7 @@ use super::symbol_context_picker::search_symbols;
 use super::thread_context_picker::{ThreadContextEntry, ThreadMatch, search_threads};
 use super::{
     ContextPickerAction, ContextPickerEntry, ContextPickerMode, MentionLink, RecentEntry,
-    available_context_picker_entries, recent_context_picker_entries, selection_ranges,
+    available_context_picker_entries, recent_context_picker_entries_with_store, selection_ranges,
 };
 use crate::message_editor::ContextCreasesAddon;
 
@@ -787,7 +787,7 @@ impl CompletionProvider for ContextPickerCompletionProvider {
             .and_then(|b| b.read(cx).file())
             .map(|file| ProjectPath::from_file(file.as_ref(), cx));
 
-        let recent_entries = recent_context_picker_entries(
+        let recent_entries = recent_context_picker_entries_with_store(
             context_store.clone(),
             thread_store.clone(),
             text_thread_store.clone(),

crates/assistant_context/Cargo.toml

@@ -11,6 +11,9 @@ workspace = true
 [lib]
 path = "src/assistant_context.rs"
 
+[features]
+test-support = []
+
 [dependencies]
 agent_settings.workspace = true
 anyhow.workspace = true

crates/assistant_context/src/context_store.rs

@@ -138,6 +138,27 @@ impl ContextStore {
         })
     }
 
+    #[cfg(any(test, feature = "test-support"))]
+    pub fn fake(project: Entity<Project>, cx: &mut Context<Self>) -> Self {
+        Self {
+            contexts: Default::default(),
+            contexts_metadata: Default::default(),
+            context_server_slash_command_ids: Default::default(),
+            host_contexts: Default::default(),
+            fs: project.read(cx).fs().clone(),
+            languages: project.read(cx).languages().clone(),
+            slash_commands: Arc::default(),
+            telemetry: project.read(cx).client().telemetry().clone(),
+            _watch_updates: Task::ready(None),
+            client: project.read(cx).client(),
+            project,
+            project_is_shared: false,
+            client_subscription: None,
+            _project_subscriptions: Default::default(),
+            prompt_builder: Arc::new(PromptBuilder::new(None).unwrap()),
+        }
+    }
+
     async fn handle_advertise_contexts(
         this: Entity<Self>,
         envelope: TypedEnvelope<proto::AdvertiseContexts>,

crates/editor/src/editor.rs

@@ -12158,6 +12158,8 @@ impl Editor {
         let clipboard_text = Cow::Borrowed(text);
 
         self.transact(window, cx, |this, window, cx| {
+            let had_active_edit_prediction = this.has_active_edit_prediction();
+
             if let Some(mut clipboard_selections) = clipboard_selections {
                 let old_selections = this.selections.all::<usize>(cx);
                 let all_selections_were_entire_line =
@@ -12230,6 +12232,11 @@ impl Editor {
             } else {
                 this.insert(&clipboard_text, window, cx);
             }
+
+            let trigger_in_words =
+                this.show_edit_predictions_in_menu() || !had_active_edit_prediction;
+
+            this.trigger_completion_on_input(&text, trigger_in_words, window, cx);
         });
     }
 

crates/prompt_store/src/prompt_store.rs

@@ -90,6 +90,15 @@ impl From<Uuid> for UserPromptId {
     }
 }
 
+impl std::fmt::Display for PromptId {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            PromptId::User { uuid } => write!(f, "{}", uuid.0),
+            PromptId::EditWorkflow => write!(f, "Edit workflow"),
+        }
+    }
+}
+
 pub struct PromptStore {
     env: heed::Env,
     metadata_cache: RwLock<MetadataCache>,