Chain of Summaries

<?php

$loader = require 'vendor/autoload.php';

$loader->add('Cognesy\\Instructor\\', __DIR__ . '../../src/');



use Cognesy\Instructor\Instructor;



$report = <<<EOT

    [2021-09-01]

    Acme Insurance project to implement SalesTech CRM solution is currently

    in RED status due to delayed delivery of document production system, led

    by 3rd party vendor - Alfatech. Customer (Acme) is discussing the resolution

    with the vendor. Due to dependencies it will result in delay of the

    ecommerce track by 2 sprints. System integrator (SysCorp) are working

    to absorb some of the delay by deploying extra resources to speed up

    development when the doc production is done. Another issue is that the

    customer is not able to provide the test data for the ecommerce track.

    SysCorp notified it will impact stabilization schedule unless resolved by

    the end of the month. Steerco has been informed last week about the

    potential impact of the issues, but insists on maintaining release schedule

    due to marketing campaign already ongoing. Customer executives are asking

    us - SalesTech team - to confirm SysCorp's assessment of the situation.

    We're struggling with that due to communication issues - SysCorp team has

    not shown up on 2 recent calls. Lack of insight has been escalated to

    SysCorp's leadership team yesterday, but we've got no response yet. The

    previously reported Integration Proxy connectivity issue which was blocking

    policy track has been resolved on 2021-08-30 - the track is now GREEN.

    Production deployment plan has been finalized on Aug 15th and awaiting

    customer approval.

    EOT;



/** Executive level summary of the project */

class Summary {

    /** current summary iteration, not bigger than 3 */

    public int $iteration = 0;

    /** @var string[] 1-3 facts most relevant from executive perspective and missing from the summary (avoid technical details) */

    public array $missingFacts = [];

    /** denser summary in 1-3 sentences, which covers every fact from the previous summary plus the missing ones */

    public string $expandedSummary = '';

}



/** Increasingly denser, expanded summaries */

class ChainOfSummaries {

    /** simplified, executive view with no details, just a single statement of overall situation */

    public string $overview;

    /** @var Summary[] contains at least 3 gradually more expanded summaries of the content */

    public array $summaries;

}



$summaries = (new Instructor)

    ->request(

        messages: $report,

        responseModel: ChainOfSummaries::class,

        prompt: 'Generate a denser summary based on the provided content.',

        toolName: 'summarizer',

        toolDescription: 'Generates a summary based on the provided content.',

        options: [

            'max_tokens' => 4096,

        ])

    ->get();



print("\n# Summaries with increasing density:\n\n");

print("Overview:\n");

print("{$summaries->overview}\n\n");

foreach ($summaries->summaries as $summary) {

    print("Expanded summary - iteration #{$summary->iteration}:\n");

    print("{$summary->expandedSummary}\n\n");

}

?>