chore: Extract PromptStore out of prompt_library (#25837)

One step closer to removing long pole with assistant/assistant2 builds

Release Notes:

- N/A

crates/prompt_store/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "prompt_store"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/prompt_store.rs"
+
+[dependencies]
+anyhow.workspace = true
+assets.workspace = true
+chrono.workspace = true
+collections.workspace = true
+fs.workspace = true
+futures.workspace = true
+fuzzy.workspace = true
+gpui.workspace = true
+handlebars.workspace = true
+heed.workspace = true
+language.workspace = true
+log.workspace = true
+parking_lot.workspace = true
+paths.workspace = true
+rope.workspace = true
+serde.workspace = true
+text.workspace = true
+util.workspace = true
+uuid.workspace = true

crates/prompt_store/LICENSE-GPL

@@ -0,0 +1 @@
+../../LICENSE-GPL

crates/prompt_store/src/prompt_store.rs

@@ -0,0 +1,415 @@
+mod prompts;
+
+use anyhow::{anyhow, Result};
+use chrono::{DateTime, Utc};
+use collections::HashMap;
+use futures::future::{self, BoxFuture, Shared};
+use futures::FutureExt as _;
+use fuzzy::StringMatchCandidate;
+use gpui::{App, BackgroundExecutor, Global, ReadGlobal, SharedString, Task};
+use heed::{
+    types::{SerdeBincode, SerdeJson, Str},
+    Database, RoTxn,
+};
+use parking_lot::RwLock;
+pub use prompts::*;
+use rope::Rope;
+use serde::{Deserialize, Serialize};
+use std::{
+    cmp::Reverse,
+    future::Future,
+    path::PathBuf,
+    sync::{atomic::AtomicBool, Arc},
+};
+use text::LineEnding;
+use util::ResultExt;
+use uuid::Uuid;
+
+/// Init starts loading the PromptStore in the background and assigns
+/// a shared future to a global.
+pub fn init(cx: &mut App) {
+    let db_path = paths::prompts_dir().join("prompts-library-db.0.mdb");
+    let prompt_store_future = PromptStore::new(db_path, cx.background_executor().clone())
+        .then(|result| future::ready(result.map(Arc::new).map_err(Arc::new)))
+        .boxed()
+        .shared();
+    cx.set_global(GlobalPromptStore(prompt_store_future))
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct PromptMetadata {
+    pub id: PromptId,
+    pub title: Option<SharedString>,
+    pub default: bool,
+    pub saved_at: DateTime<Utc>,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(tag = "kind")]
+pub enum PromptId {
+    User { uuid: Uuid },
+    EditWorkflow,
+}
+
+impl PromptId {
+    pub fn new() -> PromptId {
+        PromptId::User {
+            uuid: Uuid::new_v4(),
+        }
+    }
+
+    pub fn is_built_in(&self) -> bool {
+        !matches!(self, PromptId::User { .. })
+    }
+}
+
+pub struct PromptStore {
+    executor: BackgroundExecutor,
+    env: heed::Env,
+    metadata_cache: RwLock<MetadataCache>,
+    metadata: Database<SerdeJson<PromptId>, SerdeJson<PromptMetadata>>,
+    bodies: Database<SerdeJson<PromptId>, Str>,
+}
+
+#[derive(Default)]
+struct MetadataCache {
+    metadata: Vec<PromptMetadata>,
+    metadata_by_id: HashMap<PromptId, PromptMetadata>,
+}
+
+impl MetadataCache {
+    fn from_db(
+        db: Database<SerdeJson<PromptId>, SerdeJson<PromptMetadata>>,
+        txn: &RoTxn,
+    ) -> Result<Self> {
+        let mut cache = MetadataCache::default();
+        for result in db.iter(txn)? {
+            let (prompt_id, metadata) = result?;
+            cache.metadata.push(metadata.clone());
+            cache.metadata_by_id.insert(prompt_id, metadata);
+        }
+        cache.sort();
+        Ok(cache)
+    }
+
+    fn insert(&mut self, metadata: PromptMetadata) {
+        self.metadata_by_id.insert(metadata.id, metadata.clone());
+        if let Some(old_metadata) = self.metadata.iter_mut().find(|m| m.id == metadata.id) {
+            *old_metadata = metadata;
+        } else {
+            self.metadata.push(metadata);
+        }
+        self.sort();
+    }
+
+    fn remove(&mut self, id: PromptId) {
+        self.metadata.retain(|metadata| metadata.id != id);
+        self.metadata_by_id.remove(&id);
+    }
+
+    fn sort(&mut self) {
+        self.metadata.sort_unstable_by(|a, b| {
+            a.title
+                .cmp(&b.title)
+                .then_with(|| b.saved_at.cmp(&a.saved_at))
+        });
+    }
+}
+
+impl PromptStore {
+    pub fn global(cx: &App) -> impl Future<Output = Result<Arc<Self>>> {
+        let store = GlobalPromptStore::global(cx).0.clone();
+        async move { store.await.map_err(|err| anyhow!(err)) }
+    }
+
+    pub fn new(db_path: PathBuf, executor: BackgroundExecutor) -> Task<Result<Self>> {
+        executor.spawn({
+            let executor = executor.clone();
+            async move {
+                std::fs::create_dir_all(&db_path)?;
+
+                let db_env = unsafe {
+                    heed::EnvOpenOptions::new()
+                        .map_size(1024 * 1024 * 1024) // 1GB
+                        .max_dbs(4) // Metadata and bodies (possibly v1 of both as well)
+                        .open(db_path)?
+                };
+
+                let mut txn = db_env.write_txn()?;
+                let metadata = db_env.create_database(&mut txn, Some("metadata.v2"))?;
+                let bodies = db_env.create_database(&mut txn, Some("bodies.v2"))?;
+
+                // Remove edit workflow prompt, as we decided to opt into it using
+                // a slash command instead.
+                metadata.delete(&mut txn, &PromptId::EditWorkflow).ok();
+                bodies.delete(&mut txn, &PromptId::EditWorkflow).ok();
+
+                txn.commit()?;
+
+                Self::upgrade_dbs(&db_env, metadata, bodies).log_err();
+
+                let txn = db_env.read_txn()?;
+                let metadata_cache = MetadataCache::from_db(metadata, &txn)?;
+                txn.commit()?;
+
+                Ok(PromptStore {
+                    executor,
+                    env: db_env,
+                    metadata_cache: RwLock::new(metadata_cache),
+                    metadata,
+                    bodies,
+                })
+            }
+        })
+    }
+
+    fn upgrade_dbs(
+        env: &heed::Env,
+        metadata_db: heed::Database<SerdeJson<PromptId>, SerdeJson<PromptMetadata>>,
+        bodies_db: heed::Database<SerdeJson<PromptId>, Str>,
+    ) -> Result<()> {
+        #[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize, Hash)]
+        pub struct PromptIdV1(Uuid);
+
+        #[derive(Clone, Debug, Serialize, Deserialize)]
+        pub struct PromptMetadataV1 {
+            pub id: PromptIdV1,
+            pub title: Option<SharedString>,
+            pub default: bool,
+            pub saved_at: DateTime<Utc>,
+        }
+
+        let mut txn = env.write_txn()?;
+        let Some(bodies_v1_db) = env
+            .open_database::<SerdeBincode<PromptIdV1>, SerdeBincode<String>>(
+                &txn,
+                Some("bodies"),
+            )?
+        else {
+            return Ok(());
+        };
+        let mut bodies_v1 = bodies_v1_db
+            .iter(&txn)?
+            .collect::<heed::Result<HashMap<_, _>>>()?;
+
+        let Some(metadata_v1_db) = env
+            .open_database::<SerdeBincode<PromptIdV1>, SerdeBincode<PromptMetadataV1>>(
+                &txn,
+                Some("metadata"),
+            )?
+        else {
+            return Ok(());
+        };
+        let metadata_v1 = metadata_v1_db
+            .iter(&txn)?
+            .collect::<heed::Result<HashMap<_, _>>>()?;
+
+        for (prompt_id_v1, metadata_v1) in metadata_v1 {
+            let prompt_id_v2 = PromptId::User {
+                uuid: prompt_id_v1.0,
+            };
+            let Some(body_v1) = bodies_v1.remove(&prompt_id_v1) else {
+                continue;
+            };
+
+            if metadata_db
+                .get(&txn, &prompt_id_v2)?
+                .map_or(true, |metadata_v2| {
+                    metadata_v1.saved_at > metadata_v2.saved_at
+                })
+            {
+                metadata_db.put(
+                    &mut txn,
+                    &prompt_id_v2,
+                    &PromptMetadata {
+                        id: prompt_id_v2,
+                        title: metadata_v1.title.clone(),
+                        default: metadata_v1.default,
+                        saved_at: metadata_v1.saved_at,
+                    },
+                )?;
+                bodies_db.put(&mut txn, &prompt_id_v2, &body_v1)?;
+            }
+        }
+
+        txn.commit()?;
+
+        Ok(())
+    }
+
+    pub fn load(&self, id: PromptId) -> Task<Result<String>> {
+        let env = self.env.clone();
+        let bodies = self.bodies;
+        self.executor.spawn(async move {
+            let txn = env.read_txn()?;
+            let mut prompt = bodies
+                .get(&txn, &id)?
+                .ok_or_else(|| anyhow!("prompt not found"))?
+                .into();
+            LineEnding::normalize(&mut prompt);
+            Ok(prompt)
+        })
+    }
+
+    pub fn default_prompt_metadata(&self) -> Vec<PromptMetadata> {
+        return self
+            .metadata_cache
+            .read()
+            .metadata
+            .iter()
+            .filter(|metadata| metadata.default)
+            .cloned()
+            .collect::<Vec<_>>();
+    }
+
+    pub fn delete(&self, id: PromptId) -> Task<Result<()>> {
+        self.metadata_cache.write().remove(id);
+
+        let db_connection = self.env.clone();
+        let bodies = self.bodies;
+        let metadata = self.metadata;
+
+        self.executor.spawn(async move {
+            let mut txn = db_connection.write_txn()?;
+
+            metadata.delete(&mut txn, &id)?;
+            bodies.delete(&mut txn, &id)?;
+
+            txn.commit()?;
+            Ok(())
+        })
+    }
+
+    /// Returns the number of prompts in the store.
+    pub fn prompt_count(&self) -> usize {
+        self.metadata_cache.read().metadata.len()
+    }
+
+    pub fn metadata(&self, id: PromptId) -> Option<PromptMetadata> {
+        self.metadata_cache.read().metadata_by_id.get(&id).cloned()
+    }
+
+    pub fn first(&self) -> Option<PromptMetadata> {
+        self.metadata_cache.read().metadata.first().cloned()
+    }
+
+    pub fn id_for_title(&self, title: &str) -> Option<PromptId> {
+        let metadata_cache = self.metadata_cache.read();
+        let metadata = metadata_cache
+            .metadata
+            .iter()
+            .find(|metadata| metadata.title.as_ref().map(|title| &***title) == Some(title))?;
+        Some(metadata.id)
+    }
+
+    pub fn search(&self, query: String) -> Task<Vec<PromptMetadata>> {
+        let cached_metadata = self.metadata_cache.read().metadata.clone();
+        let executor = self.executor.clone();
+        self.executor.spawn(async move {
+            let mut matches = if query.is_empty() {
+                cached_metadata
+            } else {
+                let candidates = cached_metadata
+                    .iter()
+                    .enumerate()
+                    .filter_map(|(ix, metadata)| {
+                        Some(StringMatchCandidate::new(ix, metadata.title.as_ref()?))
+                    })
+                    .collect::<Vec<_>>();
+                let matches = fuzzy::match_strings(
+                    &candidates,
+                    &query,
+                    false,
+                    100,
+                    &AtomicBool::default(),
+                    executor,
+                )
+                .await;
+                matches
+                    .into_iter()
+                    .map(|mat| cached_metadata[mat.candidate_id].clone())
+                    .collect()
+            };
+            matches.sort_by_key(|metadata| Reverse(metadata.default));
+            matches
+        })
+    }
+
+    pub fn save(
+        &self,
+        id: PromptId,
+        title: Option<SharedString>,
+        default: bool,
+        body: Rope,
+    ) -> Task<Result<()>> {
+        if id.is_built_in() {
+            return Task::ready(Err(anyhow!("built-in prompts cannot be saved")));
+        }
+
+        let prompt_metadata = PromptMetadata {
+            id,
+            title,
+            default,
+            saved_at: Utc::now(),
+        };
+        self.metadata_cache.write().insert(prompt_metadata.clone());
+
+        let db_connection = self.env.clone();
+        let bodies = self.bodies;
+        let metadata = self.metadata;
+
+        self.executor.spawn(async move {
+            let mut txn = db_connection.write_txn()?;
+
+            metadata.put(&mut txn, &id, &prompt_metadata)?;
+            bodies.put(&mut txn, &id, &body.to_string())?;
+
+            txn.commit()?;
+
+            Ok(())
+        })
+    }
+
+    pub fn save_metadata(
+        &self,
+        id: PromptId,
+        mut title: Option<SharedString>,
+        default: bool,
+    ) -> Task<Result<()>> {
+        let mut cache = self.metadata_cache.write();
+
+        if id.is_built_in() {
+            title = cache
+                .metadata_by_id
+                .get(&id)
+                .and_then(|metadata| metadata.title.clone());
+        }
+
+        let prompt_metadata = PromptMetadata {
+            id,
+            title,
+            default,
+            saved_at: Utc::now(),
+        };
+
+        cache.insert(prompt_metadata.clone());
+
+        let db_connection = self.env.clone();
+        let metadata = self.metadata;
+
+        self.executor.spawn(async move {
+            let mut txn = db_connection.write_txn()?;
+            metadata.put(&mut txn, &id, &prompt_metadata)?;
+            txn.commit()?;
+
+            Ok(())
+        })
+    }
+}
+
+/// Wraps a shared future to a prompt store so it can be assigned as a context global.
+pub struct GlobalPromptStore(
+    Shared<BoxFuture<'static, Result<Arc<PromptStore>, Arc<anyhow::Error>>>>,
+);
+
+impl Global for GlobalPromptStore {}

crates/prompt_store/src/prompts.rs

@@ -0,0 +1,338 @@
+use anyhow::Result;
+use assets::Assets;
+use fs::Fs;
+use futures::StreamExt;
+use gpui::{App, AppContext as _, AssetSource};
+use handlebars::{Handlebars, RenderError};
+use language::{BufferSnapshot, LanguageName, Point};
+use parking_lot::Mutex;
+use serde::Serialize;
+use std::{ops::Range, path::PathBuf, sync::Arc, time::Duration};
+use text::LineEnding;
+use util::ResultExt;
+
+#[derive(Serialize)]
+pub struct ContentPromptDiagnosticContext {
+    pub line_number: usize,
+    pub error_message: String,
+    pub code_content: String,
+}
+
+#[derive(Serialize)]
+pub struct ContentPromptContext {
+    pub content_type: String,
+    pub language_name: Option<String>,
+    pub is_insert: bool,
+    pub is_truncated: bool,
+    pub document_content: String,
+    pub user_prompt: String,
+    pub rewrite_section: Option<String>,
+    pub diagnostic_errors: Vec<ContentPromptDiagnosticContext>,
+}
+
+#[derive(Serialize)]
+pub struct TerminalAssistantPromptContext {
+    pub os: String,
+    pub arch: String,
+    pub shell: Option<String>,
+    pub working_directory: Option<String>,
+    pub latest_output: Vec<String>,
+    pub user_prompt: String,
+}
+
+#[derive(Serialize)]
+pub struct ProjectSlashCommandPromptContext {
+    pub context_buffer: String,
+}
+
+pub struct PromptLoadingParams<'a> {
+    pub fs: Arc<dyn Fs>,
+    pub repo_path: Option<PathBuf>,
+    pub cx: &'a gpui::App,
+}
+
+pub struct PromptBuilder {
+    handlebars: Arc<Mutex<Handlebars<'static>>>,
+}
+
+impl PromptBuilder {
+    pub fn load(fs: Arc<dyn Fs>, stdout_is_a_pty: bool, cx: &mut App) -> Arc<Self> {
+        Self::new(Some(PromptLoadingParams {
+            fs: fs.clone(),
+            repo_path: stdout_is_a_pty
+                .then(|| std::env::current_dir().log_err())
+                .flatten(),
+            cx,
+        }))
+        .log_err()
+        .map(Arc::new)
+        .unwrap_or_else(|| Arc::new(Self::new(None).unwrap()))
+    }
+
+    pub fn new(loading_params: Option<PromptLoadingParams>) -> Result<Self> {
+        let mut handlebars = Handlebars::new();
+        Self::register_built_in_templates(&mut handlebars)?;
+
+        let handlebars = Arc::new(Mutex::new(handlebars));
+
+        if let Some(params) = loading_params {
+            Self::watch_fs_for_template_overrides(params, handlebars.clone());
+        }
+
+        Ok(Self { handlebars })
+    }
+
+    /// Watches the filesystem for changes to prompt template overrides.
+    ///
+    /// This function sets up a file watcher on the prompt templates directory. It performs
+    /// an initial scan of the directory and registers any existing template overrides.
+    /// Then it continuously monitors for changes, reloading templates as they are
+    /// modified or added.
+    ///
+    /// If the templates directory doesn't exist initially, it waits for it to be created.
+    /// If the directory is removed, it restores the built-in templates and waits for the
+    /// directory to be recreated.
+    ///
+    /// # Arguments
+    ///
+    /// * `params` - A `PromptLoadingParams` struct containing the filesystem, repository path,
+    ///   and application context.
+    /// * `handlebars` - An `Arc<Mutex<Handlebars>>` for registering and updating templates.
+    fn watch_fs_for_template_overrides(
+        params: PromptLoadingParams,
+        handlebars: Arc<Mutex<Handlebars<'static>>>,
+    ) {
+        let templates_dir = paths::prompt_overrides_dir(params.repo_path.as_deref());
+        params.cx.background_spawn(async move {
+            let Some(parent_dir) = templates_dir.parent() else {
+                return;
+            };
+
+            let mut found_dir_once = false;
+            loop {
+                // Check if the templates directory exists and handle its status
+                // If it exists, log its presence and check if it's a symlink
+                // If it doesn't exist:
+                //   - Log that we're using built-in prompts
+                //   - Check if it's a broken symlink and log if so
+                //   - Set up a watcher to detect when it's created
+                // After the first check, set the `found_dir_once` flag
+                // This allows us to avoid logging when looping back around after deleting the prompt overrides directory.
+                let dir_status = params.fs.is_dir(&templates_dir).await;
+                let symlink_status = params.fs.read_link(&templates_dir).await.ok();
+                if dir_status {
+                    let mut log_message = format!("Prompt template overrides directory found at {}", templates_dir.display());
+                    if let Some(target) = symlink_status {
+                        log_message.push_str(" -> ");
+                        log_message.push_str(&target.display().to_string());
+                    }
+                    log::info!("{}.", log_message);
+                } else {
+                    if !found_dir_once {
+                        log::info!("No prompt template overrides directory found at {}. Using built-in prompts.", templates_dir.display());
+                        if let Some(target) = symlink_status {
+                            log::info!("Symlink found pointing to {}, but target is invalid.", target.display());
+                        }
+                    }
+
+                    if params.fs.is_dir(parent_dir).await {
+                        let (mut changes, _watcher) = params.fs.watch(parent_dir, Duration::from_secs(1)).await;
+                        while let Some(changed_paths) = changes.next().await {
+                            if changed_paths.iter().any(|p| &p.path == &templates_dir) {
+                                let mut log_message = format!("Prompt template overrides directory detected at {}", templates_dir.display());
+                                if let Ok(target) = params.fs.read_link(&templates_dir).await {
+                                    log_message.push_str(" -> ");
+                                    log_message.push_str(&target.display().to_string());
+                                }
+                                log::info!("{}.", log_message);
+                                break;
+                            }
+                        }
+                    } else {
+                        return;
+                    }
+                }
+
+                found_dir_once = true;
+
+                // Initial scan of the prompt overrides directory
+                if let Ok(mut entries) = params.fs.read_dir(&templates_dir).await {
+                    while let Some(Ok(file_path)) = entries.next().await {
+                        if file_path.to_string_lossy().ends_with(".hbs") {
+                            if let Ok(content) = params.fs.load(&file_path).await {
+                                let file_name = file_path.file_stem().unwrap().to_string_lossy();
+                                log::debug!("Registering prompt template override: {}", file_name);
+                                handlebars.lock().register_template_string(&file_name, content).log_err();
+                            }
+                        }
+                    }
+                }
+
+                // Watch both the parent directory and the template overrides directory:
+                // - Monitor the parent directory to detect if the template overrides directory is deleted.
+                // - Monitor the template overrides directory to re-register templates when they change.
+                // Combine both watch streams into a single stream.
+                let (parent_changes, parent_watcher) = params.fs.watch(parent_dir, Duration::from_secs(1)).await;
+                let (changes, watcher) = params.fs.watch(&templates_dir, Duration::from_secs(1)).await;
+                let mut combined_changes = futures::stream::select(changes, parent_changes);
+
+                while let Some(changed_paths) = combined_changes.next().await {
+                    if changed_paths.iter().any(|p| &p.path == &templates_dir) {
+                        if !params.fs.is_dir(&templates_dir).await {
+                            log::info!("Prompt template overrides directory removed. Restoring built-in prompt templates.");
+                            Self::register_built_in_templates(&mut handlebars.lock()).log_err();
+                            break;
+                        }
+                    }
+                    for event in changed_paths {
+                        if event.path.starts_with(&templates_dir) && event.path.extension().map_or(false, |ext| ext == "hbs") {
+                            log::info!("Reloading prompt template override: {}", event.path.display());
+                            if let Some(content) = params.fs.load(&event.path).await.log_err() {
+                                let file_name = event.path.file_stem().unwrap().to_string_lossy();
+                                handlebars.lock().register_template_string(&file_name, content).log_err();
+                            }
+                        }
+                    }
+                }
+
+                drop(watcher);
+                drop(parent_watcher);
+            }
+        })
+            .detach();
+    }
+
+    fn register_built_in_templates(handlebars: &mut Handlebars) -> Result<()> {
+        for path in Assets.list("prompts")? {
+            if let Some(id) = path.split('/').last().and_then(|s| s.strip_suffix(".hbs")) {
+                if let Some(prompt) = Assets.load(path.as_ref()).log_err().flatten() {
+                    log::debug!("Registering built-in prompt template: {}", id);
+                    let prompt = String::from_utf8_lossy(prompt.as_ref());
+                    handlebars.register_template_string(id, LineEnding::normalize_cow(prompt))?
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    pub fn generate_inline_transformation_prompt(
+        &self,
+        user_prompt: String,
+        language_name: Option<&LanguageName>,
+        buffer: BufferSnapshot,
+        range: Range<usize>,
+    ) -> Result<String, RenderError> {
+        let content_type = match language_name.as_ref().map(|l| l.as_ref()) {
+            None | Some("Markdown" | "Plain Text") => "text",
+            Some(_) => "code",
+        };
+
+        const MAX_CTX: usize = 50000;
+        let is_insert = range.is_empty();
+        let mut is_truncated = false;
+
+        let before_range = 0..range.start;
+        let truncated_before = if before_range.len() > MAX_CTX {
+            is_truncated = true;
+            let start = buffer.clip_offset(range.start - MAX_CTX, text::Bias::Right);
+            start..range.start
+        } else {
+            before_range
+        };
+
+        let after_range = range.end..buffer.len();
+        let truncated_after = if after_range.len() > MAX_CTX {
+            is_truncated = true;
+            let end = buffer.clip_offset(range.end + MAX_CTX, text::Bias::Left);
+            range.end..end
+        } else {
+            after_range
+        };
+
+        let mut document_content = String::new();
+        for chunk in buffer.text_for_range(truncated_before) {
+            document_content.push_str(chunk);
+        }
+        if is_insert {
+            document_content.push_str("<insert_here></insert_here>");
+        } else {
+            document_content.push_str("<rewrite_this>\n");
+            for chunk in buffer.text_for_range(range.clone()) {
+                document_content.push_str(chunk);
+            }
+            document_content.push_str("\n</rewrite_this>");
+        }
+        for chunk in buffer.text_for_range(truncated_after) {
+            document_content.push_str(chunk);
+        }
+
+        let rewrite_section = if !is_insert {
+            let mut section = String::new();
+            for chunk in buffer.text_for_range(range.clone()) {
+                section.push_str(chunk);
+            }
+            Some(section)
+        } else {
+            None
+        };
+        let diagnostics = buffer.diagnostics_in_range::<_, Point>(range, false);
+        let diagnostic_errors: Vec<ContentPromptDiagnosticContext> = diagnostics
+            .map(|entry| {
+                let start = entry.range.start;
+                ContentPromptDiagnosticContext {
+                    line_number: (start.row + 1) as usize,
+                    error_message: entry.diagnostic.message.clone(),
+                    code_content: buffer.text_for_range(entry.range.clone()).collect(),
+                }
+            })
+            .collect();
+
+        let context = ContentPromptContext {
+            content_type: content_type.to_string(),
+            language_name: language_name.map(|s| s.to_string()),
+            is_insert,
+            is_truncated,
+            document_content,
+            user_prompt,
+            rewrite_section,
+            diagnostic_errors,
+        };
+        self.handlebars.lock().render("content_prompt", &context)
+    }
+
+    pub fn generate_terminal_assistant_prompt(
+        &self,
+        user_prompt: &str,
+        shell: Option<&str>,
+        working_directory: Option<&str>,
+        latest_output: &[String],
+    ) -> Result<String, RenderError> {
+        let context = TerminalAssistantPromptContext {
+            os: std::env::consts::OS.to_string(),
+            arch: std::env::consts::ARCH.to_string(),
+            shell: shell.map(|s| s.to_string()),
+            working_directory: working_directory.map(|s| s.to_string()),
+            latest_output: latest_output.to_vec(),
+            user_prompt: user_prompt.to_string(),
+        };
+
+        self.handlebars
+            .lock()
+            .render("terminal_assistant_prompt", &context)
+    }
+
+    pub fn generate_suggest_edits_prompt(&self) -> Result<String, RenderError> {
+        self.handlebars.lock().render("suggest_edits", &())
+    }
+
+    pub fn generate_project_slash_command_prompt(
+        &self,
+        context_buffer: String,
+    ) -> Result<String, RenderError> {
+        self.handlebars.lock().render(
+            "project_slash_command",
+            &ProjectSlashCommandPromptContext { context_buffer },
+        )
+    }
+}