CLI does not respect `XDG_CONFIG_HOME` when creating agents

[akoken]

Describe the bug

When attempting to create a new User agent using the Copilot CLI, the tool does not respect the XDG_CONFIG_HOME environment variable.

Furthermore, there seems to be a hardcoded path error. While the interactive prompt correctly displays the intended path based on standard conventions (~/.config/copilot/agents/), the CLI actually creates the file in an incorrectly formatted path: ~/config/.copilot/agents/ (dropping the dot from .config and adding a dot to copilot).

Actual Behavior

The CLI reports (and actually creates the file at):
/Users/<username>/config/.copilot/agents/test-agent.agent.md

Notice the missing . before config and the erroneous . added before copilot.

Screenshots / Evidence

Environment

• OS: macOS
• Copilot CLI Version: [1.0.5]
• Shell: [zsh]

Affected version

1.0.5

Steps to reproduce the behavior

1. Ensure the XDG_CONFIG_HOME environment variable is set (e.g., export XDG_CONFIG_HOME="$HOME/.config").
2. Initiate the Copilot CLI command to create a new agent.
3. When prompted "Where should the agent be created?", select option 2: User (~/.config/copilot/agents/).
4. Observe the terminal output confirming the creation path.

Expected behavior

Based on the XDG_CONFIG_HOME variable and the CLI's own prompt, the agent should be created at:
/Users/<username>/.config/copilot/agents/test-agent.agent.md

Additional context

• $ echo $XDG_CONFIG_HOME -> /Users/akoken/.config
• Prompt shows: 2. User (~/.config/copilot/agents/)
• Success message shows: Created agent at /Users/akoken/config/.copilot/agents/...

[tpope]

The display path and actual path should now both be aligned at ~/.copilot/agents.