Misc. bug: missing messages in JSON export via llama-server web UI

[bughunter2]

Name and Version

$ ./llama-cli --version
version: 5359 (de4c07f)
built with cc (Debian 12.2.0-14) 12.2.0 for x86_64-linux-gnu

Operating systems

Linux

Which llama.cpp modules do you know to be affected?

llama-server

Command line

llama-server --threads 10 --model ./Ministral-8B.gguf

Problem description & steps to reproduce

When I use the web UI to download a conversation, a JSON file is downloaded, but I only seem to get the conversation's metadata, while the messages are not included.

{
  "id": "conv-1747263476494",
  "lastModified": 1747263485918,
  "currNode": 1747263476577,
  "name": "test"
}

First Bad Commit

Not sure. I remember this worked fine with a fresh build from a month ago or so.

edit: It still worked in b5124 (bc091a4), which is when the 'Download' button was still located on the right, instead of in a context menu on the left.

[bughunter2]

@ngxson It seems your lovely webui revamp introduced this bug. Do you have some time to chime in? Cheers. 🙂

Posting the git bisect output here. It points to b5315 (8c83449) as being the commit that caused the bug.

$ git bisect bad
8c83449cb780c201839653812681c3a4cf17feed is the first bad commit
commit 8c83449cb780c201839653812681c3a4cf17feed
Author: Xuan-Son Nguyen <son@huggingface.co>
Date:   Thu May 8 15:37:29 2025 +0200

    server : (webui) revamp the input area, plus many small UI improvements (#13365)
    
    * rework the input area
    
    * process selected file
    
    * change all icons to heroicons
    
    * fix thought process collapse
    
    * move conversation more menu to sidebar
    
    * sun icon --> moon icon
    
    * rm default system message
    
    * stricter upload file check, only allow image if server has mtmd
    
    * build it
    
    * add renaming
    
    * better autoscroll
    
    * build
    
    * add conversation group
    
    * fix scroll
    
    * extra context first, then user input in the end
    
    * fix <hr> tag
    
    * clean up a bit
    
    * build
    
    * add mb-3 for <pre>
    
    * throttle adjustTextareaHeight to make it less laggy
    
    * (nits) missing padding in sidebar
    
    * rm stray console log

 common/chat.cpp                                    |   4 +-
 tools/server/public/index.html.gz                  | Bin 1263424 -> 1289940 bytes
 tools/server/webui/package-lock.json               |  93 ++++++-
 tools/server/webui/package.json                    |   2 +
 tools/server/webui/src/App.tsx                     |   2 +
 tools/server/webui/src/Config.ts                   |   2 +-
 .../src/components/ChatInputExtraContextItem.tsx   |  92 +++++++
 tools/server/webui/src/components/ChatMessage.tsx  | 134 +++++-----
 tools/server/webui/src/components/ChatScreen.tsx   | 234 ++++++++++++-----
 tools/server/webui/src/components/Header.tsx       | 106 +-------
 .../webui/src/components/MarkdownDisplay.tsx       |  23 +-
 tools/server/webui/src/components/Sidebar.tsx      | 292 +++++++++++++++++++--
 .../webui/src/components/useChatExtraContext.tsx   | 174 ++++++++++++
 .../server/webui/src/components/useChatScroll.tsx  |  34 +++
 .../server/webui/src/components/useChatTextarea.ts |  53 ++--
 tools/server/webui/src/index.scss                  |   7 +-
 tools/server/webui/src/utils/app.context.tsx       |  26 +-
 tools/server/webui/src/utils/common.tsx            |  29 ++
 tools/server/webui/src/utils/llama-vscode.ts       |  33 ++-
 tools/server/webui/src/utils/misc.ts               |  75 +++++-
 tools/server/webui/src/utils/storage.ts            |  10 +
 tools/server/webui/src/utils/types.ts              |  36 ++-
 tools/server/webui/vite.config.ts                  |   1 +
 23 files changed, 1142 insertions(+), 320 deletions(-)
 create mode 100644 tools/server/webui/src/components/ChatInputExtraContextItem.tsx
 create mode 100644 tools/server/webui/src/components/useChatExtraContext.tsx
 create mode 100644 tools/server/webui/src/components/useChatScroll.tsx

[GaryMatthews]

Any word on this bug? i tried to backup my chat history but didn't verify they where complete before clearing all the data so i lost about 40+ conversations. also a tidy way to restore conversations from backups would be a nice feature.