opencode-completion.nvim

A Neovim plugin that integrates with OpenCode server for AI-powered code completion using Treesitter for context.

Features

• Press <C-l> to trigger completion at the cursor position.
• Uses Treesitter to extract contextual code (e.g., current function or block).
• Sends a prompt to OpenCode server for completion.
• Displays "Vibe coding..." as ghost text while waiting.
• Inserts the completed code directly.

Requirements

• Neovim 0.7+
• nvim-treesitter
• plenary.nvim
• OpenCode server running on http://localhost:4096 (run opencode serve)

Installation

Using lazy.nvim:

return {
  "jaswdr/opencode-completion.nvim",
  dependencies = { "nvim-lua/plenary.nvim", "nvim-treesitter/nvim-treesitter" },
  config = function()
    require("opencode-completion").setup()
  end,
}

Usage

1. Start OpenCode server: opencode serve --port=4096
2. Open a file in Neovim.
3. Place cursor where you want completion.
4. Press <C-l> or run :OpenCodeComplete.

The plugin will show "Vibe coding..." and replace it with the completion.

Debugging Commands

• :OpenCodeComplete: Manually trigger completion (same as <C-l>).
• :OpenCodeSession: Show the current session ID (for debugging session persistence).

Configuration

Currently minimal config. Extend setup(opts) for custom server URL, etc.

Troubleshooting

• Ensure Treesitter parsers are installed for your language (e.g., :TSInstall lua).
• Check OpenCode server is running and accessible.
• If no completion, check Neovim notifications for errors.