https://paulund.co.uk Developer notebook — articles on AI, and software engineering. en Sun, 05 Apr 2026 08:46:44 +0000 https://paulund.co.uk/notebook/docker/docker-compose-healthchecks Learn how to use Docker Compose healthchecks and depends_on conditions to prevent containers from starting before their dependencies are actually ready. Tue, 31 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/docker/docker-compose-healthchecks https://paulund.co.uk/notebook/design-patterns/template-method-design-pattern Learn how the Template Method design pattern works in PHP, with a practical AI provider driver example and a look at how Laravel uses the same approach in... Tue, 31 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/design-patterns/template-method-design-pattern https://paulund.co.uk/notebook/laravel/testing-in-laravel A practical guide to writing tests in Laravel with Pest, covering feature tests, unit tests, database factories, HTTP testing, and what to actually test in... Fri, 27 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/laravel/testing-in-laravel https://paulund.co.uk/notebook/career/linkedin-profile Guidance on creating and optimising a LinkedIn profile to attract recruiters and showcase your software development experience and career highlights. Fri, 20 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/career/linkedin-profile https://paulund.co.uk/notebook/ai/ai-job-interviews AI tools have broken traditional software engineering interviews. Here's how hiring practices need to change in 2026 and what better assessment looks like. Thu, 19 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/ai/ai-job-interviews https://paulund.co.uk/resources/claude-cowork-dispatch-mobile Claude CoWork lets you dispatch coding tasks to your desktop from your phone, keeping a single persistent thread that syncs progress across all devices. Thu, 19 Mar 2026 00:00:00 +0000 https://paulund.co.uk/resources/claude-cowork-dispatch-mobile https://paulund.co.uk/notebook/ai/everything-is-markdown-now Why building AI workflows in plain text gives you model portability, and why everything from CLAUDE.md to MCP configs belongs in version-controlled markdow... Thu, 19 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/ai/everything-is-markdown-now https://paulund.co.uk/notebook/career/saas-vs-open-source-in-the-age-of-ai-coding AI can rebuild most SaaS MVPs in an afternoon. So should you still build one? A framework for deciding between SaaS and open source in 2026, and what it me... Thu, 19 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/career/saas-vs-open-source-in-the-age-of-ai-coding https://paulund.co.uk/notebook/ai/software-engineering-in-the-age-of-ai Why AI tools amplify engineering skill rather than replace it, and what strong software engineers focus on in a world where code generation is cheap. Thu, 19 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/ai/software-engineering-in-the-age-of-ai https://paulund.co.uk/resources/claude-code-scheduled-tasks-loop Claude Code v2.1.72 adds session-scoped scheduled tasks. Use /loop to poll a deployment, babysit a PR, or re-run any slash command on a repeating interval. Wed, 18 Mar 2026 00:00:00 +0000 https://paulund.co.uk/resources/claude-code-scheduled-tasks-loop https://paulund.co.uk/resources/laravel-13-released Laravel 13 ships a first-party AI SDK, JSON:API resources, native vector search with pgvector, and PHP attribute-driven configuration for jobs and controll... Wed, 18 Mar 2026 00:00:00 +0000 https://paulund.co.uk/resources/laravel-13-released https://paulund.co.uk/resources/opencode-open-source-coding-agent An open-source alternative to Claude Code that lets you pick your own model, including local and open source ones, with support for 75+ providers. Wed, 18 Mar 2026 00:00:00 +0000 https://paulund.co.uk/resources/opencode-open-source-coding-agent https://paulund.co.uk/notebook/project-docs/a-reusable-prd-framework-for-standard-saas-features Most SaaS products share the same 80% of features. Here's a reusable PRD framework so you never have to document authentication, billing, or email flows fr... Tue, 17 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/project-docs/a-reusable-prd-framework-for-standard-saas-features https://paulund.co.uk/notebook/project-docs/project-spec A practical guide to writing a project specification before development begins, covering goals, scope, tech choices, timeline, and acceptance criteria. Tue, 17 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/project-docs/project-spec https://paulund.co.uk/notebook/deployments/website-go-live-checklist A checklist of tasks to complete before launching a website to ensure it is ready for public access, covering SEO, performance, security, and monitoring. Tue, 17 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/deployments/website-go-live-checklist https://paulund.co.uk/releases/paulundai-v210-github-actions-and-claude-code-skill Version 2.1.0 adds a GitHub Actions skill to the paulund/ai plugin collection, covering how to automate Claude Code tasks in CI/CD pipelines with authentic... Tue, 17 Mar 2026 00:00:00 +0000 https://paulund.co.uk/releases/paulundai-v210-github-actions-and-claude-code-skill https://paulund.co.uk/notebook/ai/ai-rules How to define rules and guidelines for AI coding tools like Claude Code and GitHub Copilot to ensure generated code aligns with your project standards. Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/ai/ai-rules https://paulund.co.uk/notebook/design-patterns/adapter-design-pattern Learn the Adapter design pattern with practical PHP examples, showing how to make incompatible interfaces work together through a simple wrapper class. Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/design-patterns/adapter-design-pattern https://paulund.co.uk/notebook/laravel/contextual-attributes-in-laravel How to use Laravel's contextual attributes to inject different implementations of an interface depending on the class that needs it, without cluttering you... Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/laravel/contextual-attributes-in-laravel https://paulund.co.uk/notebook/career/github-profile How to create and optimise a GitHub profile to showcase your work and coding skills to potential employers, including pinned repos and a profile README. Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/career/github-profile https://paulund.co.uk/notebook/laravel/laravel-pint-code-style-formatting A guide to using Laravel Pint for automated PHP code style formatting, covering installation, configuration, available rule presets, and CI integration. Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/laravel/laravel-pint-code-style-formatting https://paulund.co.uk/notebook/php/rector-automated-php-code-refactoring A guide to using Rector for automated PHP code refactoring and modernisation, including installation, configuration, and common use cases for PHP 8.3 and 8... Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/php/rector-automated-php-code-refactoring https://paulund.co.uk/notebook/laravel/scheduled-tasks-in-laravel How to define and manage scheduled tasks in Laravel using the task scheduler, including cron setup, common schedule frequencies, and best practices. Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/laravel/scheduled-tasks-in-laravel https://paulund.co.uk/notebook/laravel/security-headers-in-laravel How to add HTTP security headers to a Laravel 12 application to protect against clickjacking, XSS, content injection, and other browser-based attacks. Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/laravel/security-headers-in-laravel https://paulund.co.uk/notebook/vscode/vscode-settings A comprehensive VSCode settings.json configuration covering editor typography, cursor settings, workbench appearance, extensions, and performance optimisat... Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/vscode/vscode-settings https://paulund.co.uk/releases/paulundai-v200-writing-php-and-wordpress-plugins Version 2.0.0 of the paulund/ai Claude Code plugin collection adds three new plugins covering technical writing, PHP 8.3+ best practices, and WordPress the... Mon, 16 Mar 2026 00:00:00 +0000 https://paulund.co.uk/releases/paulundai-v200-writing-php-and-wordpress-plugins https://paulund.co.uk/notebook/ai/claude-skills A complete guide to Claude Skills — what they are, how to build them, file structure, YAML requirements, workflow patterns, testing, and distribution. Fri, 13 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/ai/claude-skills https://paulund.co.uk/notebook/ai/claude-sub-agents How sub-agents work in Claude Code, covering the exploration, planning, and implementation phases, and practical tips for writing effective agent prompts. Fri, 13 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/ai/claude-sub-agents https://paulund.co.uk/notebook/php/phpstan-static-analysis-for-php A guide to using PHPStan for static analysis in PHP projects, covering installation, configuration, analysis levels, and best practices for PHPStan 2.x. Sun, 08 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/php/phpstan-static-analysis-for-php https://paulund.co.uk/notebook/laravel/rate-limiting-in-laravel How to implement rate limiting in Laravel to protect your routes and API endpoints from abuse, using the throttle middleware and custom rate limiters. Sun, 08 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/laravel/rate-limiting-in-laravel https://paulund.co.uk/notebook/ai/claudemd-file How to write an effective CLAUDE.md project instructions file for Claude Code, covering what to include and how Claude uses it to understand your codebase. Sat, 07 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/ai/claudemd-file https://paulund.co.uk/notebook/design-patterns/builder-design-pattern Learn the Builder design pattern with PHP examples. Covers the Director, Builder, Concrete Builder, and Product roles, and when to use this pattern. Thu, 05 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/design-patterns/builder-design-pattern https://paulund.co.uk/notebook/deployments/cicd An overview of Continuous Integration and Continuous Deployment, covering automation tools and workflows for deploying code reliably to production. Thu, 05 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/deployments/cicd https://paulund.co.uk/notebook/deployments/containerisation How to package your application and its dependencies into container images for consistent, reproducible deployments across any environment you target. Thu, 05 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/deployments/containerisation https://paulund.co.uk/releases/cron-manager-v100-manage-laravel-scheduled-tasks Cron Manager is a self-hosted web UI for managing Laravel cron jobs from a database, removing the need to edit PHP files or crontabs to change your schedul... Thu, 05 Mar 2026 00:00:00 +0000 https://paulund.co.uk/releases/cron-manager-v100-manage-laravel-scheduled-tasks https://paulund.co.uk/notebook/git/git-branching-strategies An overview of the most common Git branching strategies — Git Flow, trunk-based development, GitHub Flow, and more — with guidance on choosing the right on... Thu, 05 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/git/git-branching-strategies https://paulund.co.uk/notebook/good-code/managing-cognitive-load-in-code How cognitive load affects software development, what causes it, and practical strategies to reduce it by writing simpler, clearer code. Thu, 05 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/good-code/managing-cognitive-load-in-code https://paulund.co.uk/releases/viewhook-011-docker-images-now-built-for-arm64 Viewhook v0.1.1 adds multi-architecture Docker image builds, so you can run it natively on Apple Silicon and ARM-based servers without emulation. Thu, 05 Mar 2026 00:00:00 +0000 https://paulund.co.uk/releases/viewhook-011-docker-images-now-built-for-arm64 https://paulund.co.uk/notebook/architecture/architecture-diagrams Guidelines for creating and maintaining architecture diagrams using the C4 model and tools like Structurizr and Mermaid. Wed, 04 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/architecture/architecture-diagrams https://paulund.co.uk/releases/viewhook-010-initial-open-source-release Viewhook is open source: a self-hostable webhook testing tool that captures, inspects, and forwards HTTP requests in real time, with no Redis required. Wed, 04 Mar 2026 00:00:00 +0000 https://paulund.co.uk/releases/viewhook-010-initial-open-source-release https://paulund.co.uk/notebook/deployments/ab-testing-deployments How A/B testing deployments work by routing a percentage of traffic to a new version and comparing performance against the existing version. Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/deployments/ab-testing-deployments https://paulund.co.uk/notebook/apis/api-caching How to use Cache-Control headers and ETags in your REST API to reduce bandwidth, lower server load, and deliver faster responses to your API consumers. Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/apis/api-caching https://paulund.co.uk/notebook/apis/api-consistency-rules Why a consistent API style matters and what your style guide must cover — from field casing and pagination parameters to error envelopes and versioning con... Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/apis/api-consistency-rules https://paulund.co.uk/notebook/apis/api-deprecation-process A five-step process for deprecating REST API endpoints gracefully — from signalling deprecation in the API itself through to safely removing the endpoint. Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/apis/api-deprecation-process https://paulund.co.uk/notebook/apis/api-error-handling How to handle errors consistently in a REST API — using a global exception handler, correlation IDs, server-side logging, and careful information disclosur... Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/apis/api-error-handling https://paulund.co.uk/notebook/apis/api-field-naming-consistency Why picking a single field naming convention — and enforcing it across response bodies, query parameters, and error details — saves client developers signi... Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/apis/api-field-naming-consistency https://paulund.co.uk/notebook/apis/api-idempotency How idempotency works in REST APIs, which HTTP methods are idempotent by design, and how to make POST safe for retries using Idempotency-Key headers. Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/apis/api-idempotency https://paulund.co.uk/notebook/apis/api-rate-limiting-and-throttling How to protect a REST API from abuse using rate limiting — covering response headers, 429 handling, and the trade-offs between fixed window, sliding window... Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/apis/api-rate-limiting-and-throttling https://paulund.co.uk/notebook/career/aws-cloud-practitioner-essentials-module-4-going-global Study notes on AWS global infrastructure, region selection, edge locations, and high availability strategies from the AWS Cloud Practitioner Essentials cou... Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/career/aws-cloud-practitioner-essentials-module-4-going-global https://paulund.co.uk/notebook/career/aws-cloud-practitioner-essentials-module-5-networking Study notes on AWS networking including VPCs, subnets, security groups, and global networking services from the AWS Cloud Practitioner Essentials course. Mon, 02 Mar 2026 00:00:00 +0000 https://paulund.co.uk/notebook/career/aws-cloud-practitioner-essentials-module-5-networking