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Myth/Scribe

Scribe is a CodeIgniter 4 package that gives you a clean, driver-based abstraction for talking to AI language models. Point it at Claude, OpenAI, or Gemini — your application code stays the same regardless of which provider you use.

What it does

You define a Prompt class that describes what you want the AI to do. Scribe takes care of building the system prompt, calling the right provider, and returning a normalized AIResponse you can work with in plain PHP.

<?php

// Define once
class SummarizePrompt extends BasePrompt
{
    public function systemPrompt(): string
    {
        return 'You are a concise summarizer. Return a 2-sentence summary.';
    }

    public function userPrompt(): string
    {
        return 'Summarize: ' . $this->text;
    }

    public function __construct(private string $text) {}
}

// Use anywhere
$response = service('scribe')->run(new SummarizePrompt($articleText));
echo $response->content;

Key features

  • Driver-based — swap providers without touching your prompt classes
  • Structured output — pass a JSON schema and get typed data back via toArray()
  • Test-friendly — FakeDriver lets you unit-test prompts without any HTTP calls
  • CI4-native — auto-discovered via Composer, wired into CI4's service layer

Next steps