Feature: /shell command — run host shell commands

  Background:
    Given user "user_abc123" is sending commands

  Scenario: No arguments shows usage
    When user sends "/shell"
    Then reply contains "Usage: /shell"

  Scenario: Runs echo and returns output
    When user sends "/shell echo hello"
    Then reply contains "hello"
    And reply contains "exit code: 0"

  Scenario: Blocked dangerous command is rejected
    When user sends "/shell rm -rf /"
    Then reply contains "Blocked"
    And reply does not contain "exit code"

  Scenario: Non-zero exit code is reported
    When user sends "/shell exit 1"
    Then reply contains "exit code"