Install in Claude Code (plugin)

The one-line install already covers Claude Code. The plugin is the other way: it brings /sessioncost, /livesession and the guard’s hooks by itself, and needs Git. No Python? The first /sessioncost or /livesession fetches one.

Install from Claude Code’s plugin menu

1. Open Manage Plugins (in VS Code: the Claude Code panel’s plugin menu; in the CLI: type /plugin).
2. Marketplaces tab: paste kish21/sessioncost and click Add.
3. Plugins tab: type sessioncost in Search plugins… (the list is sorted by installs, so it sits far down without a search), then click Install. Where it asks where to install, choose user (every folder), not project or local: those give SessionCost to one folder only, and chats in every other folder have no /sessioncost, no /livesession and no guard.
4. Reload VS Code (Ctrl+Shift+P → Developer: Reload Window) or restart the CLI, open a new chat and type /: /sessioncost and /livesession are in the list (they may show as /sessioncost:sessioncost and /sessioncost:livesession).

Adding the marketplace (step 2) only lists the plugin; step 3 installs it.

Or: one command in a terminal

Open a terminal (Windows: press the Windows key, type powershell, press Enter) and type:

claude plugin install sessioncost --marketplace kish21/sessioncost --scope user

It adds SessionCost’s marketplace and installs the plugin for every folder in one go. It ends with ✔ Successfully installed plugin: sessioncost@sessioncost (scope: user). Then:

• VS Code: reload the window (Ctrl+Shift+P → Developer: Reload Window).
• Claude Code CLI (claude in a terminal): start it again.

Open a new chat and type /: /sessioncost and /livesession are in the list (they may show as /sessioncost:sessioncost and /sessioncost:livesession). The CLI and VS Code share one install.

In the Claude Code CLI you can also type it in the chat: /plugin install sessioncost --marketplace kish21/sessioncost --scope user.

It does not show up?

You see	What happened, what to do
claude is not recognized	Only the VS Code extension is installed, without Claude Code’s command line. Use the one-line install instead: it gives Claude Code the same two commands.
git is not found	A plugin is downloaded with Git. Install Git, open a new terminal, and run the command again, or use the one-line install.
Installed, but no /sessioncost in the chat	The chat was open before the install. Reload VS Code (or restart the CLI) and open a new chat.
You added the marketplace and cannot find the plugin	It is in the Plugins tab under Available, far down: type sessioncost in Search plugins… and click Install. Adding a marketplace only lists the plugin; it does not install it.
It works in one folder, but not in chats in other folders	The plugin was installed for one folder only. Check in a terminal: claude plugin list shows sessioncost with Scope: local or project. Install it for every folder: claude plugin install sessioncost@sessioncost --scope user, reload VS Code (or restart the CLI) and open a new chat.
Your Claude Code is older than 2.1.275 (claude --version)	Use two steps: claude plugin marketplace add kish21/sessioncost, then claude plugin install sessioncost@sessioncost --scope user.

New versions: in the CLI, once: /plugin → Marketplaces → sessioncost → Enable auto-update. In VS Code: in a terminal, claude plugin update sessioncost@sessioncost.

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