How to reduce notification / message level to reduce spamming in Neovim?

[brokenthorn]

Excessive LSP progress Notifications During Typing

fsautocomplete is sending an unthrottled stream of progress LSP notifications to the client (Neovim) immediately following nearly every keystroke, resulting in notification spam and poor user experience.

Steps to Reproduce

1. Open an F# file with fsautocomplete running.
2. Type rapidly in the buffer.

Actual Behavior

The editor is flooded with constant progress notifications from fsautocomplete and once they reach the current line, they cover up most of the code and hinder further typing.

Expected Behavior

The server should throttle or debounce $/progress reports to a reasonable interval (e.g., $\geq 250\text{ms}$) to prevent notification spam during continuous typing.

Current Workaround

Client-side filtering is required to silence the notifications:

return {
  "folke/noice.nvim",
  opts = {
    routes = {
      {
        -- fsautocomplete spams with notifications when editing
        filter = {
          event = "lsp",
          kind = "progress",
          cond = function(message)
            local client = vim.tbl_get(message.opts, "progress", "client")
            return client == "fsautocomplete"
          end,
        },
        opts = { skip = true },
      },
    },
  },
}

[TheAngryByrd]

The server should throttle or debounce $/progress reports to a reasonable interval (e.g., ≥ 250 ms) to prevent notification spam during continuous typing.

Yeah this makes sense. Would be a great contribution to have!