Hamoud Alhoqbani alhoqbani

See more of my writing here. Also check out Devin

In this post, I'll start from scratch and build up to OpenClaw's architecture step by step, showing how you could have invented it yourself from first principles, using nothing but a messaging API, an LLM, and the desire to make AI actually useful outside the chat window.

End goal: understand how persistent AI assistants work, so you can build your own (or become an OpenClaw power user).

First, let's establish the problem

When you use ChatGPT or Claude in a browser, there are several limitations:

Command Line Text to PDF Tools

pdftotext

Documentation: http://www.foolabs.com/xpdf/download.html

Mac install

brew install poppler

Basic Run Command

pdftotext document.pdf text_file.txt

Verify and Repair Disk Permissions via Terminal (Mac OS X)

Verify Permissions

diskutil verifyPermissions /

Repair Permissions

diskutil repairPermissions /

Nginx FastCGI response buffer sizes

By default when Nginx starts receiving a response from a FastCGI backend (such as PHP-FPM) it will buffer the response in memory before delivering it to the client. Any response larger than the set buffer size is saved to a temporary file on disk.

This process is outlined at the Nginx ngx_http_fastcgi_module page manual page.

Introduction
Determine actual FastCGI response sizes
Setting the buffer size
Verifying results

السلام عليكم ، هذا كود ريجيكس بسيط للتحقق من صحة أرقام الجوالات السعودية ، يقوم الريجيكس بالتحقق من مفتاح الدولة ، مفتاح شركة الإتصالات لضمان صحة النص المدخل .

Hello, this is a simple regex to validate saudi mobile numbers, the code will validate country code, telecome company code and make sure the tested sting is correct .

/^(009665|9665|\+9665|05|5)(5|0|3|6|4|9|1|8|7)([0-9]{7})$/

	<?php

	require_once 'vendor/autoload.php';

	use Jose\Factory\JWKFactory;
	use Jose\Factory\JWSFactory;

	$key_file = '/PATH/TO/KEY/FILE';
	$secret = null; // If the key is encrypted, the secret must be set in this variable

	#!/bin/bash

	# Check if command was ran as root.
	if [[ $(id -u) -eq 0 ]]; then
	echo "The command \"sphp\" should not be executed as root or via sudo directly."
	echo "When a service requires root access, you will be prompted for a password as needed."
	exit 1
	fi

	# Usage

	# Add this snippet to the top of your playbook.
	# It will install python2 if missing (but checks first so no expensive repeated apt updates)
	# gwillem@gmail.com

	- hosts: all
	gather_facts: False

	tasks:
	- name: install python 2
	raw: test -e /usr/bin/python \|\| (apt -y update && apt install -y python-minimal)

	<?php
	$countryArray = array(
	'AD'=>array('name'=>'ANDORRA','code'=>'376'),
	'AE'=>array('name'=>'UNITED ARAB EMIRATES','code'=>'971'),
	'AF'=>array('name'=>'AFGHANISTAN','code'=>'93'),
	'AG'=>array('name'=>'ANTIGUA AND BARBUDA','code'=>'1268'),
	'AI'=>array('name'=>'ANGUILLA','code'=>'1264'),
	'AL'=>array('name'=>'ALBANIA','code'=>'355'),
	'AM'=>array('name'=>'ARMENIA','code'=>'374'),
	'AN'=>array('name'=>'NETHERLANDS ANTILLES','code'=>'599'),