bug: Avante is increasingly unusable lately

[synic]

Describe the bug

There are multiple issues that seem to have popped up in the last few weeks. They all seem related, and they include:

1. No output. It'll say "I'll help you do X", and then it will say "Generation complete!", but nothing was in the output.
2. Incomplete output. It'll start outputting the changes, but then just stop, and say "Generation complete!". It doesn't add the closing triple quote, so everything else in the window is seen as code.
3. Diffs are wrong or cannot be applied. The code blocks are just plaintext. Sometimes the "apply" will show up, but when you press "a" nothing happens. Or, if you press "a" it applies them incompletely or in the wrong place.

To reproduce

I've tried multiple versions of Avante, I've tried going back to the versions that seemed to work a few weeks ago, but nothing seems to change it. I mention this because it possibly indicates there's something different about the way the llm is responding? Since going back to earlier versions doesn't fix it.

Installation method

Use lazy.nvim:

{
  "yetone/avante.nvim",
  event = "VeryLazy",
  lazy = false,
  version = false, -- set this if you want to always pull the latest change
  opts = {
    -- add any opts here
  },
  -- if you want to build from source then do `make BUILD_FROM_SOURCE=true`
  build = "make",
  -- build = "powershell -ExecutionPolicy Bypass -File Build.ps1 -BuildFromSource false" -- for windows
  dependencies = {
    "nvim-treesitter/nvim-treesitter",
    "stevearc/dressing.nvim",
    "nvim-lua/plenary.nvim",
    "MunifTanjim/nui.nvim",
  },
}

Environment

:version
NVIM v0.10.2
Build type: Release
LuaJIT 2.1.1732813678
Run ":verbose version" for more info

MacOS 15.2, using Anthropic

Repro

vim.env.LAZY_STDPATH = ".repro"
load(vim.fn.system("curl -s https://raw.githubusercontent.com/folke/lazy.nvim/main/bootstrap.lua"))()

require("lazy.minit").repro({
  spec = {
    -- add any other plugins here
  },
})

[tonio-m]

this has been happening a lot with me too

[Jinbiao-Lin]

To me as well even after a thorough re-install

[yetone]

Issue 1 and Issue 2 were resolved yesterday.

[yetone]

‌‌‌At the same time, it is suspected that issue 3 is also caused by issues 1 and 2. You can update to the latest version to see if the problem still exists.

[Jinbiao-Lin]

Issue 1 and Issue 2 were resolved yesterday.

Awesome, it works for me now. Thanks for your hard work on the plugin. Really like it!

[synic]

I have just updated and I'll let you know how it goes. Thank you!

[synic]

It's definitely still happening. Example:

You can see that it started outputting one diff, stopped before it was complete, tried outputting another diff and only got to the triple backquotes before it bailed. The "apply" hint doesn't display when you go to the diff (but even if it did, it would just mess the file up if you tried applying it)

[rolandtannous]

@synic. are you using openrouter? or deepseek?

[synic]

@rolandtannous I am not