Tree views lack loading and error states when CLI commands fail

[aadorian]

Summary

Agents, Models, MCP, and Sessions tree providers refresh asynchronously via child_process.exec() with stderr redirected to /dev/null and || true. When the OpenCode CLI fails or is unavailable, users see stale or placeholder data with no loading spinner or error feedback.

Location

extension.js — AgentsProvider, McpProvider, SessionsProvider, ModelsProvider refresh() methods

Suggested Fix

• Show a loading state while exec() is in flight
• Surface CLI errors via vscode.window.showWarningMessage
• Distinguish "CLI not installed" from "command failed"

Environment

Found during exploratory GUI/UX testing session (21/06/2026)