feat(cli): Add styled splash screen with ASCII art logo

[MarvelNwachukwu]

Summary

• Replaces plain-text help output with a styled splash screen matching the ADK-TS CLI aesthetic
• Magenta ASCII art "ADK CLAW" logo, tagline, version, colored command list, and footer links
• Running adk-claw with no args now shows the splash instead of auto-running init (adk-claw init still works)

Test plan

• Run pnpm dev:cli (no args) — should display splash screen
• Run pnpm dev:cli --help — should display splash screen
• Run pnpm dev:cli init — should run setup wizard as before
• Run pnpm dev:cli --version — should print version
• Run pnpm build && pnpm cli — verify built mode works

[gemini-code-assist]

Summary of Changes

Hello @MarvelNwachukwu, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly upgrades the command-line interface's initial user interaction by introducing a rich, styled splash screen. This change improves the aesthetic appeal and clarity of the CLI's entry point, making it more user-friendly and consistent with the project's branding. It refactors how help and version information are presented, centralizing display logic and enhancing the overall first impression for users.

Highlights

• Enhanced CLI User Experience: Replaced the previous plain-text help output with a visually appealing, styled splash screen for the adk-claw CLI.
• New Splash Screen Features: The new splash screen includes a magenta ASCII art 'ADK CLAW' logo, a tagline, the current version, a colored list of available commands, and helpful footer links.
• Default Command Behavior Change: Executing adk-claw without any arguments now displays the new splash screen instead of automatically running the init command. The adk-claw init command still functions as before.
• Simplified Version Output: The --version flag now directly prints the version string, removing the need for a separate printVersion function.

Changelog

• src/cli/index.ts
  • Added picocolors import for colored console output.
  • Defined VERSION constant and LOGO ASCII art string.
  • Implemented printSplash function to display the new styled splash screen.
  • Modified the main function's switch statement to call printSplash when no command is provided, for help flags, and for unknown commands.
  • Updated the version command case to directly log the version string.
  • Removed the printHelp and printVersion utility functions, as their functionality is now integrated into printSplash or handled directly.

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[gemini-code-assist]

Code Review

The pull request successfully introduces a styled splash screen for the CLI, enhancing the user experience and consolidating help and version output. The change in default behavior to display the splash screen instead of auto-running init is a clear improvement, aligning with common CLI patterns. The new splash screen provides a more engaging and informative initial interaction for users. My feedback primarily focuses on improving maintainability by centralizing the version number definition to prevent potential inconsistencies.

[gemini-code-assist]

Hardcoding the VERSION constant here can lead to inconsistencies if the project's version in package.json is updated but this file is not. It's best practice to derive the version directly from package.json to maintain a single source of truth and ensure all parts of the application reflect the correct version.

import { createRequire } from 'module';
const require = createRequire(import.meta.url);
const { version: CLI_VERSION } = require('../../package.json');

[gemini-code-assist]

Following the suggestion to derive the version from package.json, this line should use the imported version constant (CLI_VERSION) instead of the hardcoded VERSION constant.

console.log(`adk-claw v${CLI_VERSION}`);