bug: completion via blink potentially blocks other completion sources

[sghng]

Neovim version (nvim -v)

v0.12.0-dev-1118+g6a330f893b

Neovim distribution

N/A

Operating system

macOS Tahoe Public Beta

Terminal emulator / GUI

Ghostty

Describe the bug

When completions = { blink = { enabled = true } } is set, the completion from render-markdown works, but it could block LSP completions from other sources! After switching to completions = { lsp = { enabled = true } }, both render-markdown and other LSP completion sources work.

This is a very unusual bug since most users won't care about additional LSP completions inside Markdown files. I discovered this while experimenting with Quarto .pmd files (think of it as a plain text alternative for Jupyter Notebook).

The quarto-nvim utilized otter.nvim to provide language support for languages embedded inside Markdown (fenced code blocks). It provides diagnostics and completions through LSP for those code blocks. For more info, see this official tutorial of using Neovim with Quarto.

I believe this use case isn't that rare, since having auto completions for code blocks in MD is still desirable.

In addition, there is evidence that this could interfere with other completions. For example, this comment also suggested that render-markdown blink completion must be turned off to make another completion source work.

Expected behavior

Render markdown completion shouldn't conflict with any other sources, whether lsp or blink is in use.

Healthcheck output

==============================================================================
render-markdown:                                                            ✅

render-markdown.nvim [versions] ~
- ✅ OK neovim >= 0.11
- ✅ OK tree-sitter ABI: 15
- ✅ OK plugin: 8.7.15

render-markdown.nvim [configuration] ~
- ✅ OK valid

render-markdown.nvim [tree-sitter markdown] ~
- ✅ OK parser: installed
- ✅ OK ABI: 14
- ✅ OK highlights: ~/.local/share/nvim/lazy/nvim-treesitter/queries/markdown/highlights.scm
- ✅ OK highlighter: enabled

render-markdown.nvim [tree-sitter markdown_inline] ~
- ✅ OK parser: installed
- ✅ OK ABI: 14
- ✅ OK highlights: ~/.local/share/nvim/lazy/nvim-treesitter/queries/markdown_inline/highlights.scm

render-markdown.nvim [tree-sitter html] ~
- ✅ OK parser: installed
- ✅ OK ABI: 14

render-markdown.nvim [tree-sitter latex] ~
- ✅ OK parser: installed
- ✅ OK ABI: 14

render-markdown.nvim [tree-sitter yaml] ~
- ✅ OK parser: installed
- ✅ OK ABI: 14

render-markdown.nvim [icons] ~
- ✅ OK using: nvim-web-devicons

render-markdown.nvim [executables] ~
- ✅ OK latex2text: installed

render-markdown.nvim [conflicts] ~
- ✅ OK headlines: not installed
- ✅ OK markview: not installed
- ✅ OK obsidian: installed but should not conflict

Plugin configuration

{
		"MeanderingProgrammer/render-markdown.nvim",
		dependencies = {
			"nvim-tree/nvim-web-devicons",
			"nvim-treesitter/nvim-treesitter",
			"jbyuki/nabla.nvim",
		},
		cmd = "RenderMarkdown",
		keys = {
			{
				"<LocalLeader>r",
				"<Cmd>RenderMarkdown toggle<CR>",
				desc = "[r]ender Markdown",
				ft = "markdown",
			},
		},
		ft = { "markdown", "codecompanion", "quarto" },
		---@module "render-markdown"
		---@type render.md.Config
		---@diagnostic disable: missing-fields
		opts = {
			file_types = { "markdown", "codecompanion", "quarto" },
			-- WARN: completion via blink potentially impairs other LSP completions!
			completions = { lsp = { enabled = true } },
			win_options = { conceallevel = { rendered = 2 } },
			-- handover math rendering to nabla
			-- latex = { enabled = false },
			-- TODO: nabla inline rendering doesn't look well, report
			on = {
				attach = function()
					-- must be called after render-markdown is attached
					-- require("nabla").enable_virt({ autogen = true })
				end,
			},
			-- code border doesn't work with transparent background
			code = { highlight_border = false },
			inline_highlight = { highlight = "Cursor" }, -- HL Group required
		},
		---@diagnostic enable: missing-fields
	},

Plugin error log

NA

Confirmations

• I have updated this plugin to the latest version using my plugin manager
• I have provided the text contained in all screenshots as raw text in this issue. This means if there is a screenshot below it is the copy pasted contents of the file in the screenshot. I understand that my issue will be closed if I have not.

Additional information

Some additional info, obtained with completions = { blink = { enabled = true } }.

LspInfo: excerpt

vim.lsp: Active Features ~
- folding_range
  - Active buffers:

- inline_completion
  - Active buffers:

- semantic_tokens
  - Active buffers:
      [3]: pyrefly (id: 1), ty (id: 3)

vim.lsp: Active Clients ~
- pyrefly (id: 1)
  - Version: ? (no serverInfo.version response)
  - Root directory: nil
  - Command: { "pyrefly", "lsp" }
  - Settings: {}
  - Attached buffers: 3
- ruff (id: 2)
  - Version: 0.12.10
  - Root directory: nil
  - Command: { "ruff", "server" }
  - Settings: {}
  - Attached buffers: 3
- ty (id: 3)
  - Version: 0.0.1-alpha.19 (e9cb838b3 2025-08-19)
  - Root directory: nil
  - Command: { "ty", "server" }
  - Settings: {}
  - Attached buffers: 3
- otter-ls[1] (id: 4)
  - Version: 2.0.0
  - Root directory: ~/Library/CloudStorage/OneDrive-Personal/Projects/NLP + ML + Q-Matrix
  - Command: <function @/Users/sghuang/.local/share/nvim/lazy/otter.nvim/lua/otter/lsp/init.lua:29>
  - Settings: {}
  - Attached buffers: 1

Blink check health:

==============================================================================
blink.cmp:                                                                1 ⚠️

System ~
- ✅ OK curl is installed
- ✅ OK git is installed
- ✅ OK Your system is supported by pre-built binaries (aarch64-apple-darwin)
- ✅ OK blink_cmp_fuzzy lib is downloaded/built

Sources ~
- ⚠️ WARNING Some providers may show up as "disabled" but are enabled dynamically (i.e. cmdline)

Default sources ~
- lsp (blink.cmp.sources.lsp)
- path (blink.cmp.sources.path)
- snippets (blink.cmp.sources.snippets)
- buffer (blink.cmp.sources.buffer)
- omni (blink.cmp.sources.complete_func)
- obsidian (obsidian.completion.sources.blink.refs)
- copilot (blink-copilot)
- lazydev (lazydev.integrations.blink)

Cmdline sources ~
- buffer (blink.cmp.sources.buffer)
- cmdline (blink.cmp.sources.cmdline)

Disabled sources ~
- obsidian_tags (obsidian.completion.sources.blink.tags)
- obsidian_new (obsidian.completion.sources.blink.new)
- markdown (render-markdown.integ.blink)

My dot files can be found here.

Could be related: #76