Issue with poetry shell Command Not Working After Installing poetry-plugin-shell via pipx

Description:
Hi, I installed the Poetry plugin poetry-plugin-shell following the official instructions. However, when I run poetry shell, I get the error message "The command 'shell' does not exist."

Steps to reproduce:

1. Installed Poetry via pipx: pipx install poetry
2. Installed the poetry-plugin-shell plugin via pipx using:

   pipx inject poetry poetry-plugin-shell
   

3. Attempted to run poetry shell, but received the following error message:

   The command "shell" does not exist.
   

Expected behavior:

The poetry shell command should work after installing the plugin.

Actual behavior:

poetry shell does not work and the error message appears.

System Information:

• Poetry version: Poetry (version 2.0.1)
• Python version: Python 3.12.3
• Operating System: Ubuntu 24.04.1 LTS (WSL 2 on Windows)
• Poetry installation method: pipx
• Plugin installation method: pipx inject

Additional context:

This issue persists even after a successful installation via pipx. Please let me know if any further information is needed. Thank you!

Solution:

The issue was resolved by running the following command:

poetry self add poetry-plugin-shell

Start by comparing the reported pipx inject poetry poetry-plugin-shell installation with the working poetry self add poetry-plugin-shell command, then reproduce poetry shell using Poetry 2.0.1. Done means the documented installation path reliably makes the shell command available, or clearly explains the required command.