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codex-nvim-context-mcp

v0.1.0

Published

MCP server that exposes Neovim editor context to Codex.

Vulnerabilities

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  • 0Medium
  • 0Low

Links

Git

Maintainers

s-maetas-maeta

Keywords

codexneovimmcpeditorcontext

Readme

codex-nvim-context-mcp

MCP server for exposing Neovim editor context to external Codex sessions.

What It Does

  • starts a local MCP server over stdio
  • starts a localhost HTTP ingest endpoint at 127.0.0.1:8765/session/update
  • stores the latest editor context published by codex.nvim
  • exposes tools for Codex to read active file, selection, and cursor context

Tools

  • list_editor_sessions
  • get_active_editor_context
  • get_active_selection
  • get_active_cursor_context
  • ping_editor_session

Requirements

  • Node.js 20+
  • codex.nvim configured to publish editor context
  • terminal codex

Run

npx -y codex-nvim-context-mcp

Local development:

node ./server.mjs

Environment variables:

  • CODEX_NVIM_CONTEXT_MCP_HOST
  • CODEX_NVIM_CONTEXT_MCP_PORT
  • CODEX_NVIM_CONTEXT_MCP_TOKEN
  • CODEX_NVIM_CONTEXT_MCP_DEBUG=1
  • CODEX_NVIM_CONTEXT_MCP_LOG_FILE=/path/to/log
  • legacy CODEX_NVIM_MCP_* variables are still accepted for compatibility

Codex CLI

Published-package target:

[mcp_servers.codex-nvim]
command = "npx"
args = ["-y", "codex-nvim-context-mcp"]
startup_timeout_sec = 60

Local development:

[mcp_servers.codex-nvim]
command = "/absolute/path/to/node"
args = ["/absolute/path/to/codex-nvim-context-mcp/server.mjs"]
startup_timeout_sec = 60

The package is MIT-licensed.

Smoke Test

  1. Start codex-nvim-context-mcp
  2. Enable external_context.enabled = true in codex.nvim
  3. Open a file in Neovim and move the cursor or make a visual selection
  4. Start terminal codex
  5. Call get_active_editor_context
  6. Confirm the returned file path and line range match Neovim

Privacy Notes

  • bind to localhost only
  • keep CODEX_NVIM_CONTEXT_MCP_TOKEN set when sharing a machine
  • selection text and cursor-context text may be returned by MCP tools when the client requests them