vscode-cloak: Instructions file for GitHub Copilot

Copilot Instructions — Cloak

Project Type

This is a VS Code extension written in TypeScript. The package.json contributes field is the product spec — commands, settings, menus, and keybindings are all declared there.

TypeScript Conventions

• Use strict mode (enforced by tsconfig.json)
• Prefer async/await over raw Promises
• Use the vscode namespace for all VS Code API calls — import as import * as vscode from 'vscode'
• Destructure vscode submodules at the top of a file when used repeatedly (e.g., const { commands } = vscode)
• Export functions and classes — avoid default exports
• Use enums for string constants (Commands, Settings, Sections) rather than raw strings

Extension Patterns

• Command handler pattern: Each command handler is an exported async function in src/commands.ts, registered in src/extension.ts via commands.registerCommand(Commands.enumValue, handler)
• Configuration access: Always use the helpers in src/configuration/ — never call vscode.workspace.getConfiguration() directly in command handlers
• Re-export barrels: Both src/models/index.ts and src/configuration/index.ts re-export all members. Import from the barrel ('./models', './configuration') not from individual files
• Status bar: Single shared instance in src/statusbar.ts — left-aligned, uses Codicon $(eye)

Code Style

• Formatter: Prettier — single quotes, trailing commas, 100-char line width, 2-space indent (see .prettierrc.js)
• Linter: ESLint with @typescript-eslint parser (see .eslintrc)
• Lint with npm run lint, auto-fix with npm run lint-fix

Test Conventions

• Runner: Mocha with TDD UI (suite, test, suiteSetup, suiteTeardown)
• Host: Tests run inside a VS Code instance via vscode-test — they are integration tests, not unit tests
• Test files: Place tests in src/test/suite/ with .test.ts suffix
• Setup/teardown: Use setupTestSuite() and teardownTestSuite() from src/test/suite/lib/setup-teardown-test-suite.ts to save and restore user settings
• Assertions: Use Node's built-in assert module
• Run with npm test (compiles first) or npm run just-test (assumes already compiled)