diff --git a/crates/project/src/project.rs b/crates/project/src/project.rs
index 0690cc9188..b4e698e08a 100644
--- a/crates/project/src/project.rs
+++ b/crates/project/src/project.rs
@@ -912,7 +912,6 @@ impl Project {
         self.user_store.clone()
     }
 
-    #[cfg(any(test, feature = "test-support"))]
     pub fn opened_buffers(&self, cx: &AppContext) -> Vec<ModelHandle<Buffer>> {
         self.opened_buffers
             .values()
diff --git a/crates/semantic_index/src/db.rs b/crates/semantic_index/src/db.rs
index c53a3e1ba9..15172323c2 100644
--- a/crates/semantic_index/src/db.rs
+++ b/crates/semantic_index/src/db.rs
@@ -190,6 +190,10 @@ impl VectorDatabase {
                 )",
                 [],
             )?;
+            db.execute(
+                "CREATE INDEX spans_digest ON spans (digest)",
+                [],
+            )?;
 
             log::trace!("vector database initialized with updated schema.");
             Ok(())
diff --git a/crates/semantic_index/src/parsing.rs b/crates/semantic_index/src/parsing.rs
index 281b683853..49d748a07c 100644
--- a/crates/semantic_index/src/parsing.rs
+++ b/crates/semantic_index/src/parsing.rs
@@ -207,7 +207,7 @@ impl CodeContextRetriever {
 
         if PARSEABLE_ENTIRE_FILE_TYPES.contains(&language_name.as_ref()) {
             return self.parse_entire_file(relative_path, language_name, &content);
-        } else if language_name.as_ref() == "Markdown" {
+        } else if ["Markdown", "Plain Text"].contains(&language_name.as_ref()) {
             return self.parse_markdown_file(relative_path, &content);
         }
 
diff --git a/crates/semantic_index/src/semantic_index.rs b/crates/semantic_index/src/semantic_index.rs
index 53df3476d3..6dd5572ab0 100644
--- a/crates/semantic_index/src/semantic_index.rs
+++ b/crates/semantic_index/src/semantic_index.rs
@@ -24,6 +24,7 @@ use smol::channel;
 use std::{
     cmp::Ordering,
     future::Future,
+    mem,
     ops::Range,
     path::{Path, PathBuf},
     sync::{Arc, Weak},
@@ -37,7 +38,7 @@ use util::{
 };
 use workspace::WorkspaceCreated;
 
-const SEMANTIC_INDEX_VERSION: usize = 10;
+const SEMANTIC_INDEX_VERSION: usize = 11;
 const BACKGROUND_INDEXING_DELAY: Duration = Duration::from_secs(5 * 60);
 const EMBEDDING_QUEUE_FLUSH_TIMEOUT: Duration = Duration::from_millis(250);
 
@@ -767,6 +768,93 @@ impl SemanticIndex {
                     });
                 }
             }
+            let dirty_buffers = project.read_with(&cx, |project, cx| {
+                project
+                    .opened_buffers(cx)
+                    .into_iter()
+                    .filter_map(|buffer_handle| {
+                        let buffer = buffer_handle.read(cx);
+                        if buffer.is_dirty() {
+                            Some((buffer_handle.downgrade(), buffer.snapshot()))
+                        } else {
+                            None
+                        }
+                    })
+                    .collect::<HashMap<_, _>>()
+            });
+
+            cx.background()
+                .spawn({
+                    let mut retriever = CodeContextRetriever::new(embedding_provider.clone());
+                    let embedding_provider = embedding_provider.clone();
+                    let phrase_embedding = phrase_embedding.clone();
+                    async move {
+                        let mut results = Vec::new();
+                        'buffers: for (buffer_handle, buffer_snapshot) in dirty_buffers {
+                            let language = buffer_snapshot
+                                .language_at(0)
+                                .cloned()
+                                .unwrap_or_else(|| language::PLAIN_TEXT.clone());
+                            if let Some(spans) = retriever
+                                .parse_file_with_template(None, &buffer_snapshot.text(), language)
+                                .log_err()
+                            {
+                                let mut batch = Vec::new();
+                                let mut batch_tokens = 0;
+                                let mut embeddings = Vec::new();
+
+                                // TODO: query span digests in the database to avoid embedding them again.
+
+                                for span in &spans {
+                                    if span.embedding.is_some() {
+                                        continue;
+                                    }
+
+                                    if batch_tokens + span.token_count
+                                        > embedding_provider.max_tokens_per_batch()
+                                    {
+                                        if let Some(batch_embeddings) = embedding_provider
+                                            .embed_batch(mem::take(&mut batch))
+                                            .await
+                                            .log_err()
+                                        {
+                                            embeddings.extend(batch_embeddings);
+                                            batch_tokens = 0;
+                                        } else {
+                                            continue 'buffers;
+                                        }
+                                    }
+
+                                    batch_tokens += span.token_count;
+                                    batch.push(span.content.clone());
+                                }
+
+                                if let Some(batch_embeddings) = embedding_provider
+                                    .embed_batch(mem::take(&mut batch))
+                                    .await
+                                    .log_err()
+                                {
+                                    embeddings.extend(batch_embeddings);
+                                } else {
+                                    continue 'buffers;
+                                }
+
+                                let mut embeddings = embeddings.into_iter();
+                                for span in spans {
+                                    let embedding = span.embedding.or_else(|| embeddings.next());
+                                    if let Some(embedding) = embedding {
+                                        todo!()
+                                    } else {
+                                        log::error!("failed to embed span");
+                                        continue 'buffers;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                })
+                .await;
+
             let batch_results = futures::future::join_all(batch_results).await;
 
             let mut results = Vec::new();