Tech mentor and iOS engineer in Surabaya, Indonesia. Seven years of production iOS across banking, healthcare, and education, now facilitating at the Apple Developer Academy and working on retrieval-augmented generation and NLP.https://nandamochammad.xyz/https://nandamochammad.xyz/writing/swiftdata-in-production/https://nandamochammad.xyz/writing/swiftdata-in-production/SwiftData demos look easy until you ship a POS app with 10,000 transactions. A field guide to the four traps that bite real apps (@Query overuse, unpaginated lists, delete-rule crashes, and background writes) with production Swift code and an honest SwiftData vs Core Data vs GRDB verdict.Sat, 04 Jul 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/the-ai-access-ladder/https://nandamochammad.xyz/writing/the-ai-access-ladder/We did not ban AI. We built a ladder instead: five levels of access, from no-AI fundamentals to full delegation, matched to what a learner is actually trying to build. The decision rules, the science of desirable difficulty, and the honest results, including the failures.Sat, 27 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/the-power-of-claude-code-hooks/https://nandamochammad.xyz/writing/the-power-of-claude-code-hooks/Hooks are the part of Claude Code almost nobody turns on: small shell commands that fire at fixed points in the agent's loop, so you can auto-format every edit, block a dangerous command before it runs, or ping yourself when a task finishes, deterministically, without asking the model to remember. A look at what they are, where they live, and three I keep switched on.Tue, 23 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/app-icon-with-icon-composer/https://nandamochammad.xyz/writing/app-icon-with-icon-composer/A step-by-step guide to creating adaptive iOS and macOS app icons using Icon Composer in Xcode 26. Pick a Figma community template, export SVG, configure layers for light, dark, and tinted appearances, then wire it up to your target.Sun, 21 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/prompting-for-general-tasks/https://nandamochammad.xyz/writing/prompting-for-general-tasks/Most bad AI answers come from the same handful of prompt mistakes: vague ask, missing context, no example, no format. This is the anatomy of a prompt that works, a short taxonomy of the errors people actually make, and a symptom-to-fix table for repairing a response instead of starting over.Sun, 21 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/vibe-coding-vs-engineering/https://nandamochammad.xyz/writing/vibe-coding-vs-engineering/Vibe coding is real and it works, for the right things. A field guide to the spectrum between talking a feature into existence and actually engineering it, the stakes-by-lifespan matrix that tells you which one a task deserves, and one rule that survives contact with production: you can vibe what you could verify.Sat, 20 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/becoming-ai-fluent-a-learners-playbook/https://nandamochammad.xyz/writing/becoming-ai-fluent-a-learners-playbook/Knowing the 4D framework is not the same as living it. This is the implementation side: why AI fluency matters for learners now, what changes when you build the habits versus when you don't, and a per-session and four-week routine that turns Delegation, Description, Discernment, and Diligence into reflexes.Fri, 19 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/the-4d-framework-for-working-with-ai/https://nandamochammad.xyz/writing/the-4d-framework-for-working-with-ai/Anthropic's AI Fluency course teaches four habits (Delegation, Description, Discernment, Diligence) for working well with AI. Here is what each one means, the sub-skills inside it, and why a learner who internalises the 4Ds gets more from AI without quietly outsourcing their own understanding.Thu, 18 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/connect-claude-to-zotero-with-mcp/https://nandamochammad.xyz/writing/connect-claude-to-zotero-with-mcp/A step-by-step guide to wiring Claude into your own Zotero library with a local MCP server. Search, summarise, and pull quotes from your papers in plain conversation, with every hop staying on your machine.Tue, 16 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/set-up-linear-mcp-with-claude-code/https://nandamochammad.xyz/writing/set-up-linear-mcp-with-claude-code/Linear ships an official hosted MCP server, so wiring it into Claude Code is one command and a browser sign-in, with no install and no API key. This is a plain, step-by-step guide to connecting it, confirming it works, and using it for real project management without letting it loose on your tracker.Tue, 16 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/set-up-zotero-mcp-with-claude-code/https://nandamochammad.xyz/writing/set-up-zotero-mcp-with-claude-code/You do not have to install or configure anything by hand. With Claude Code in auto mode, you prompt and it does the work. This is a plain, step-by-step guide to the prompts, the checks, and confirming the connection on both macOS and Windows.Tue, 16 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/printing-thermal-receipts-from-ipad-esc-pos/https://nandamochammad.xyz/writing/printing-thermal-receipts-from-ipad-esc-pos/There is no Swift package that just works for the cheap thermal printers Indonesian shops actually buy. This is the byte-level field guide (ESC/POS, Core Bluetooth, MTU chunking, and a small ReceiptBuilder you can copy) for printing a Rupiah receipt from an iPad.Sat, 13 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/git-branching-strategies-at-any-scale/https://nandamochammad.xyz/writing/git-branching-strategies-at-any-scale/A practical field guide to the four branching models that cover almost every project (commit-to-main, GitHub Flow, trunk-based, and Git Flow), with the commands for each and a clear rule for knowing which one you are actually in.Fri, 12 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/git-workflow-for-teams/https://nandamochammad.xyz/writing/git-workflow-for-teams/A practical playbook for working in a shared repository: branching cleanly, writing commits that explain themselves, opening reviewable pull requests, staying in sync without rewriting shared history, and choosing how a PR lands.Fri, 12 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/structuring-a-new-swiftui-project/https://nandamochammad.xyz/writing/structuring-a-new-swiftui-project/A practical starting structure for a fresh SwiftUI app: the entry point, grouping by feature instead of by kind, where state actually lives, naming conventions, and the honest signal for when to reach for Swift Packages.Fri, 12 Jun 2026 00:00:00 GMThttps://nandamochammad.xyz/writing/platform-multiplatform-companion-apps/https://nandamochammad.xyz/writing/platform-multiplatform-companion-apps/Three terms that describe how Apple apps relate to hardware, and how code is shared (or not) across devices. Defined, illustrated, and compared with references to Apple's documentation and WWDC sessions.Thu, 11 Jun 2026 00:00:00 GMT