lambda Pi Kit

This kit installs Pi behind the codex command inside Docker SBX's built-in codex agent. Using the built-in identity is intentional: SBX 0.35 associates the stored OpenAI OAuth credential with the codex agent name. The launch command is therefore:

sbx run --kit git+https://github.com/withlogicco/sbx-kit-lambda codex

The default codex command launches the lambda agent. The original SBX Codex CLI remains available as sbx-codex:

codex
sbx-codex

Pi starts on openai-codex/gpt-5.6-terra with high thinking. Its model picker is scoped to all Codex models and OpenCode Go models.

Setup

Store OpenCode Go API key:

sbx secret set -g opencode-go

Authenticate with OpenAI:

sbx secret set -g openai --oauth

SBX retains the credential on the host and does not expose its value in the sandbox.

Run

Add this function to ~/.zshrc to create or resume a sandbox named lambda-<current-directory>:

lambda() {
  local name="lambda-${PWD:t}"
  local kit="git+https://github.com/withlogicco/sbx-kit-lambda"

  if [[ "${1:-}" == "--reset" ]] && sbx ls --quiet | grep -Fxq -- "$name"; then
    sbx rm --force "$name"
  fi

  if sbx ls --quiet | grep -Fxq -- "$name"; then
    sbx run --name "$name"
  else
    sbx run --kit "$kit" --name "$name" codex
  fi
}

Reload your Zsh configuration with source ~/.zshrc, then run lambda from the project directory. To remove the directory's existing sandbox and create a fresh one, run lambda --reset.

sbx run --kit git+https://github.com/withlogicco/sbx-kit-lambda codex

Run lambda after the sandbox is created:

sbx run --kit git+https://github.com/withlogicco/sbx-kit-lambda --name <sandbox-name> codex

Validate the kit with:

sbx kit validate .