Codex

OpenAI Codex CLI

MCP Servers

Config file location: ~/.codex/config.toml

[mcp_servers.claude-code]command = "claude"args = ["mcp", "serve"]
[mcp_servers.context7]command = "npx"args = ["-y", "@upstash/context7-mcp"]
[mcp_servers.shadcn]command = "npx"args = ["shadcn@latest", "mcp"]

Command

# Continue the most recent interactive session for the current directorycodex resume --last
# Skip approvals and sandbox entirely, extremely dangerouscodex --dangerously-bypass-approvals-and-sandbox

codex resume --last filters by the current working directory by default, so running it inside a project will try to continue the latest session for that project. Codex does not automatically resume when you cd into a directory, but you can wrap that behavior in a shell function.

Shell Function

No auto-resume

Always start a fresh session with just the base arguments:

Zsh

codex() {  local base_args="--dangerously-bypass-approvals-and-sandbox"
  command codex ${=base_args} "$@"}

PowerShell

function codex {    $baseArgs = @("--dangerously-bypass-approvals-and-sandbox")    $codexPath = (Get-Command codex -CommandType Application | Select-Object -First 1).Source
    & $codexPath @baseArgs @args}

Auto-resume

Try to continue the latest session for the current directory first; if it fails, start a new one:

Zsh

codex() {  local base_args="--dangerously-bypass-approvals-and-sandbox"
  command codex ${=base_args} resume --last "$@" 2>/dev/null || command codex ${=base_args} "$@"}

PowerShell

function codex {    $baseArgs = @("--dangerously-bypass-approvals-and-sandbox")    $codexPath = (Get-Command codex -CommandType Application | Select-Object -First 1).Source
    & $codexPath @baseArgs resume --last @args 2>$null
    if ($LASTEXITCODE -ne 0) {        & $codexPath @baseArgs @args    }}