ep: Dont send type definition requests to tombi (#54676)

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes #ISSUE

Release Notes:

- N/A or Added/Fixed/Improved ...

crates/edit_prediction_context/src/edit_prediction_context.rs

@@ -289,6 +289,11 @@ impl RelatedExcerptStore {
                                 .ok()?;
                             let type_definitions = project
                                 .update(cx, |project, cx| {
+                                    // tombi LSP for toml will open a scratch buffer with the JSON schema of
+                                    // the toml file when a goto type definition is requested
+                                    if is_tombi_lsp_in_toml(project, &buffer, cx) {
+                                        return Task::ready(Ok(None));
+                                    }
                                     project.type_definitions(&buffer, identifier.range.start, cx)
                                 })
                                 .ok()?;
@@ -723,3 +728,23 @@ fn is_tsx_tag(buffer: &BufferSnapshot, node: &tree_sitter::Node) -> bool {
     }
     true
 }
+
+fn is_tombi_lsp_in_toml(
+    project: &Project,
+    buffer: &Entity<Buffer>,
+    cx: &mut Context<Project>,
+) -> bool {
+    buffer.update(cx, |buffer, cx| {
+        if !buffer.language().is_some_and(|lang| lang.name() == "TOML") {
+            return false;
+        }
+        project.lsp_store().update(cx, |lsp_store, cx| {
+            for (_, lsp) in lsp_store.running_language_servers_for_local_buffer(buffer, cx) {
+                if "tombi".eq_ignore_ascii_case(lsp.name().as_ref()) {
+                    return true;
+                }
+            }
+            false
+        })
+    })
+}

docs/src/languages/toml.md

@@ -9,31 +9,4 @@ TOML support is available through the [TOML extension](https://zed.dev/extension
 
 - Tree-sitter: [tree-sitter/tree-sitter-toml](https://github.com/tree-sitter/tree-sitter-toml)
 
-## Language server
-
 A TOML language server is available in the [Tombi extension](https://zed.dev/extensions/tombi).
-
-<div class="warning">
-
-Tombi replies to language server requests for definitions by opening a scratch JSON buffer with the schema definition for some known formats (`Cargo.toml`, `pyproject.toml`, ...). Since [Edit Predictions](/docs/ai/edit-prediction) rely on looking up definitions, this leads to tabs opening when you edit the TOML file.
-
-You can fix it by [disabling definition requests](https://tombi-toml.github.io/tombi/docs/configuration/#lsp-goto-definition-enabled) in your Tombi configuration:
-
-```toml
-[lsp]
-goto-type-definition.enabled = false
-```
-
-Alternatively, you can disable edit predictions in TOML buffers:
-
-```json
-{
-  "languages": {
-    "TOML": {
-      "show_edit_predictions": false // https://github.com/tombi-toml/tombi/issues/1556
-    }
-  }
-}
-```
-
-</div>