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SessionCost

Install with Node (npm)

Needs only Node.js (it comes with npx): nodejs.org, the LTS version. No Python needed.

  1. Open a terminal and type:

    Terminal window
    npx sessioncost setup

    Answer y if npx asks to install the package.

  2. The first run installs SessionCost once into its own folder, ~/.sessioncost/npm/venv. It uses uv when you have it, otherwise your Python 3.10 or newer; with neither, it installs uv first, and uv fetches Python by itself. Your own Python is left as it is.

  3. For each agent it finds it prints /sessioncost and /livesession added and live guard ready.

  4. Restart your agents. In a chat, type /sessioncost.

From then on, type npx sessioncost … for every terminal command, for example npx sessioncost update.

Installed an agent later? Run npx sessioncost setup again.

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