Stale diagnostics when content is updated outside the editor #2353
Description
Summary
As seen in the following video, when I add new content to the file using echo, the diagnostics isn't updated:
Screen.Recording.2026-01-06.at.11.01.49.mov
Here's the code:
import os
import somethingAnd, then use the following command to append the file with a new unknown import:
echo "import other\n" >> src/ty_server/bug.pyHere's what Neovim is sending when the above command is executed which is a didClose notification followed by a didOpen notification with the updated file content:
2026-01-06 11:02:09 [DEBUG] rpc.send {
jsonrpc = "2.0",
method = "textDocument/didClose",
params = {
textDocument = {
uri = "file:///Users/dhruv/playground/ty-server/src/ty_server/bug.py"
}
}
}
2026-01-06 11:02:09 [DEBUG] rpc.send {
jsonrpc = "2.0",
method = "textDocument/didOpen",
params = {
textDocument = {
languageId = "python",
text = "import os\n\nimport something\nimport other\n\n",
uri = "file:///Users/dhruv/playground/ty-server/src/ty_server/bug.py",
version = 0
}
}
}
And, here's the logs which says that ty thinks the diagnostics are unchanged:
2026-01-06 11:02:09 [DEBUG] rpc.send {
id = 6,
jsonrpc = "2.0",
method = "textDocument/diagnostic",
params = {
previousResultId = "919997a55b1181a2",
textDocument = {
uri = "file:///Users/dhruv/playground/ty-server/src/ty_server/bug.py"
}
}
}
2026-01-06 11:02:09 [DEBUG] rpc.receive {
id = 6,
jsonrpc = "2.0",
result = {
kind = "unchanged",
resultId = "919997a55b1181a2"
}
}
These are the ty server's debug logs during the didClose and didOpen events:
2026-01-06 11:02:09.644047000 DEBUG notification{method="textDocument/didClose"}: Closing file `/Users/dhruv/playground/ty-server/src/ty_server/bug.py`
2026-01-06 11:02:09.644209000 DEBUG notification{method="textDocument/didClose"}: Take open project files
2026-01-06 11:02:09.644357000 DEBUG notification{method="textDocument/didClose"}:set_open_files{open_files={}}: Set open project files (count: 0)
2026-01-06 11:02:09.644687000 DEBUG notification{method="textDocument/didOpen"}: Opening file `/Users/dhruv/playground/ty-server/src/ty_server/bug.py`
2026-01-06 11:02:09.644716000 DEBUG notification{method="textDocument/didOpen"}: Take open project files
2026-01-06 11:02:09.644771000 DEBUG notification{method="textDocument/didOpen"}:set_open_files{open_files={file(Id(c09))}}: Set open project files (count: 1)
Version
ty ruff/0.14.10+203 (e63cf978a 2026-01-05)