1 files changed, 3 insertions, 0 deletions

diff --git a/docs/dev/lsp-extensions.md b/docs/dev/lsp-extensions.md
index f0f981802..e2ea695f2 100644
--- a/docs/dev/lsp-extensions.md
+++ b/docs/dev/lsp-extensions.md
@@ -81,6 +81,7 @@ If this capability is set, `CodeAction` returned from the server contain an addi
 interface CodeAction {
     title: string;
     group?: string;
+    data?: string;
     ...
 }
 ```
@@ -101,6 +102,8 @@ The set of actions `[ { title: "foo" }, { group: "frobnicate", title: "bar" }, {
 
 Alternatively, selecting `frobnicate` could present a user with an additional menu to choose between `bar` and `baz`.
 
+`data` field contains optional json data for deferred resolve of the action data that's slow to compute in the original request.
+
 ### Example
 
 ```rust