cc99

Neovim plugin for scoped AI-assisted code editing, powered by Claude Code CLI.

Special thanks to ThePrimeagen and his 99 plugin for the inspiration behind this project.

What Makes cc99 Different

Unlike traditional inline AI plugins that embed the entire file into the prompt, cc99 gives Claude read-only tool access (Read, Grep, Glob, LS). Claude explores the codebase on its own and gathers only the context it needs. This means:

• Smaller prompts — only the selected code and user instruction are sent
• Smarter context — Claude finds relevant code across the project, not just the current file
• Real-time progress — see what Claude is doing (reading files, searching, analyzing) as it works

Features

• Visual selection replacement — select code, describe what you want, Claude replaces it
• Streaming status display — animated spinner + live progress messages via extmark virtual lines
• Async execution — non-blocking, keep editing while Claude works
• Auto project analysis — generates .cc99/CC99.md on first run for project-level context
• <CODE> stream parsing — status lines shown before <CODE>, replacement code extracted from within

Installation

Using lazy.nvim:

{
    "your-username/cc99",
    config = function()
        require("cc99").setup()
    end,
}

Prerequisites

• Neovim 0.10+
• Claude Code CLI installed and authenticated

Usage

1. Select code in visual mode
2. Press <leader>ccm to mark the selection and open the prompt window
3. Type your instruction in the floating window
4. Press <leader>ccx to execute
5. Watch Claude's progress in virtual lines below your selection
6. Code is replaced automatically when done
7. u to undo if needed

Keybindings

Mode	Key	Action
Visual	<leader>ccm	Mark selection and open prompt window
Normal	<leader>ccx	Execute Claude with current prompt
Normal	<leader>ccq	Close prompt window

Configuration

require("cc99").setup({
    window = {
        relative = "editor",
        border = "rounded",
        style = "minimal",
        title = "cc99",
        title_pos = "center",
    },
})

License

MIT