Wind productdevbook

Individual Contributor License Agreement

Note: this document is not legal advice. It should be reviewed by a lawyer before use.

This agreement is based on the structure of the Apache Individual Contributor License Agreement. "You" means the individual who submits a Contribution. "Fil" means the project at github.com/productdevbook/fil, and "Maintainer" means productdevbook.

"Contribution" means any original work of authorship, including modifications or additions to existing work, that You intentionally submit to the Maintainer for inclusion in Fil, by pull request, patch, issue, or any other means.

1. Copyright license

The day a "images aren't showing" bug dragged me from the frontend down to Google Cloud org policies

I had built a feature that generates product images with AI. One day I noticed the gallery was empty — not even a "generating" indicator. I started thinking "five-minute bug," and ended up wiring together Google Cloud org policies, IAM, Vertex AI, and Cloudflare AI Gateway. Here's the whole thing, start to finish, with every wall I hit along the way.

The start: "No images in the gallery"

My app (sayfa.app) has a Studio feature: the user picks a product photo, tweaks the scene/lighting/style, and AI generates a professional product image. Behind the scenes it runs Google's Gemini image model (gemini-3-pro-image).

My complaint was simple:

An Expo SDK 56 launch crash that turned out to be three copies of one library

My iOS app started crashing the moment it launched. No JS error, no red screen, just a native abort before anything rendered. TestFlight, local device builds, simulator, all the same.

The crash log:

dyld: Symbol not found: ExpoModulesCore.AnyModule._exposedDefinition()
  Referenced from: ExpoFont.framework (and ExpoLocation.framework)
 Expected in: ExpoModulesCore.framework

Isolating a self-hosted macOS GitHub Actions runner from your daily user account

If you run a self-hosted GitHub Actions runner on the same Mac you use every day, do not run the runner under your normal desktop user account.

This is especially important for iOS builds that use Fastlane, match, Xcode signing, or any workflow that calls the macOS security CLI.

What can go wrong

A self-hosted runner is not a VM by default. It runs as a normal process on the host, using the home directory, keychain, SSH config, caches, and environment of the user that owns the service.

Running CI runners next to production without them fighting

If you self-host GitHub Actions runners on the same machine as a production Kubernetes cluster, you've got a quiet problem waiting to happen. A heavy CI job, say a Rust cargo build that spawns a dozen rustc processes and a memory-hungry linker, can grab every core and most of the RAM on the box. When that happens your databases don't crash in any obvious way. They just get slow, start missing health checks, and begin flapping. Nobody gets paged for "the linker used 40 gigs," but everyone notices the API timing out.

I ran into exactly this and fixed it with plain systemd resource control on cgroup v2. No nested containers, no extra daemons. Here's what I learned.

The setup

One bare-metal box with 12 logical cores (6 physical plus hyperthreading) and 64 GB of RAM. A k3s cluster runs the real work: app pods, Postgres, that sort of thing. Two self-hosted runners sit on the same host and build Rust projects all day.

Claude Code Custom Status Line

A custom status line for Claude Code that displays:

Directory name
Model name
Context usage with progress bar and percentage
Git branch with file counts and line changes (added/removed)

Preview

Pinia Colada: The Magical Way of Fetching Data in Vue.js 🍹

What is Pinia Colada? Learning Through an E-commerce Story

Imagine an online store. This store has thousands of products, and customers are constantly viewing products, adding them to cart, and making purchases. Pinia Colada is an amazing tool for managing this store's data!

Pinia Colada is a smart data fetching layer developed for Vue.js. The name might remind you of a cocktail, but it's actually a tool built on top of the Pinia state management library that makes data fetching operations much easier.

What's the Difference Between Pinia and Pinia Colada?

Drizzle ORM PostgreSQL Best Practices Guide (2025)

Latest Drizzle ORM features and optimal schema patterns

Major 2025 Update: PostgreSQL now recommends identity columns over serial types. Drizzle has fully embraced this change.

import { pgTable, integer, text, timestamp, varchar } from 'drizzle-orm/pg-core';

🧠 VSCode Tip: Format Current File with ESLint (No Plugin Needed)

You can run eslint --fix on the currently open file in VSCode without using the ESLint extension by combining a task and a custom shortcut.

Create a .vscode/tasks.json file in your project and add the following:

pnpm install -g eslint

	import Bun from 'bun'
	import { createYoga, YogaInitialContext, YogaServerInstance } from 'graphql-yoga'
	import { makeHandler } from "graphql-ws/lib/use/bun";
	import { ExecutionArgs } from "@envelop/types";

	import { schema } from './graphql/schema';

	interface IUserContext {
	token?: string;
	}