Module plugin 

Client CLI shellout for plugin installation (ADR-0008).

Plugins are installed by shelling out to each client’s native CLI:

• Claude Code: claude plugin marketplace add + claude plugin install
• Copilot CLI: copilot plugin marketplace add + copilot plugin install
• VS Code: code --install-extension
• opencode: opencode plugin

This module exposes typed install/uninstall functions per client. All functions return structured results (never write to stdout/stderr) and handle CLI-not-found gracefully per the warn-skip policy.

Enums

PluginCheckResult

Result of checking whether a specific plugin is currently installed in the client. Used by doctor for plugin reconciliation.

PluginOutcome

Outcome of a plugin install or uninstall attempt.

PluginScope

Scope for Claude plugin installation, derived from upskill’s project/global flag.

Functions

check_claude_plugin_installed

Check whether a Claude Code plugin is installed for the given scope.

check_opencode_plugin_installed

Check whether an opencode plugin is installed.

check_vscode_extension_installed

Check whether a VS Code extension is installed.

install_claude_plugin

Install a Claude Code plugin via claude plugin marketplace add followed by claude plugin install. The marketplace-add step is idempotent.

install_copilot_plugin

Install a GitHub Copilot CLI plugin via copilot plugin marketplace add followed by copilot plugin install. The marketplace-add step is idempotent. Unlike Claude, Copilot CLI does not support a --scope flag.

install_opencode_plugin

Install an opencode module via opencode plugin.

install_vscode_extension

Install a VS Code extension via code --install-extension.

is_cli_available

Returns true if the named CLI binary is available on PATH.

uninstall_claude_plugin

Uninstall a Claude Code plugin.

uninstall_copilot_plugin

Uninstall a GitHub Copilot CLI plugin.

uninstall_opencode_plugin

Uninstall an opencode module.

uninstall_vscode_extension

Uninstall a VS Code extension.