Zero-Cost Observability for Agent Crons
A low-cost observability pattern for agent crons using logs, artifacts, summaries, and delivery checks before adding paid monitoring tools.
Programmer & Software Architect in Indonesia
Practical software systemsfrom Indonesia
Practical software notes from a Korean programmer and software architect in Indonesia — Laravel/Vue SaaS projects, DevOps, AI agents, and the Korea to Southeast Asia tech bridge.
15+
Years in Indonesia
26
Engineering notes
23
Tracked GitHub repos
2012
GitHub since
Engineering lens
I write from hands-on software work: Laravel SaaS projects, DevOps, Windows utilities, AI automation, and the operating constraints of building from Indonesia.
AI agents
Verification gates, artifact proof, and production failure modes.
DevOps
Cron jobs, CI/CD, deployment checks, and operational discipline.
Frontend
Vue, Tailwind, CSS, and generated UI that remains maintainable.
Portfolio
Modoo Laravel SaaS projects, web systems, Windows utilities, networking tools, and serial communication testers.
Start here
A short path through the core argument of this site: agents need maps, automation needs proof, and tools need exit paths.
Reading path
The guided entry point for the site's core operating argument.
AI operations
Agent contracts, cron proof, zombie detection, and model portability.
Laravel/Vue SaaS
State ownership, UI correctness, cron artifacts, and rollback habits.
Developer tools
Tool choices, model backends, design systems, and exit paths.
Latest writing
One post per day. Mon = news · Tue = code · Wed = Indonesia · Thu = tools · Fri = debate · Sat = build · Sun = free.
Closed Loop Beats More Automation
Why automation only compounds when it closes the loop with metrics, review, and next actions instead of simply generating more output.
Shinjae Kang
Read
The Agent Edit Contract I Use Before a Coding Agent Touches a Repo
A practical contract for giving coding agents repository context, edit boundaries, verification steps, and rollback paths before they touch code.
Shinjae Kang
Read
Your Coding Agent Needs a Map, Not a Bigger Context Window
Why coding agents need compact repository maps, ownership boundaries, and verification paths more than bigger context windows.
Shinjae Kang
Read
Before You Adopt a Beta Library, Prove the Exit Path
A practical test for adopting beta libraries: prove the rollback path, migration cost, and ownership model before they enter production.
Shinjae Kang
Read
Code That Renders Is Not Code You Can Trust
A field note on why rendered UI is not enough, and how to verify AI-generated interfaces against behavior, accessibility, and maintenance risk.
Shinjae Kang
Read
Your Cron Job Is Not Healthy Until the Artifact Proves It
A production checklist for cron jobs that proves useful artifacts exist, are fresh, and can be consumed downstream after the process exits.
Shinjae Kang
Read
Open Weights Just Ate the API Margin — What a Pragmatic Dev Actually Does on Monday
GLM-5.2's MIT-licensed open weights at one-sixth the cost of GPT-5.5 isn't a benchmark story — it's a cost-structure story. Here's what it means for your architecture decisions this week.
Shinjae Kang
Read
The 5 Cron Patterns That Lie to You — Exit 0 Doesn't Mean Success
Five cron patterns that look healthy while silently failing, with checks for stale files, empty outputs, partial JSON, and missing delivery.
Shinjae Kang
Read
The JavaScript I Deleted With CSS: A 2026 Survival Guide
A 2026 frontend survival guide for replacing unnecessary JavaScript with modern CSS features while keeping behavior accessible and maintainable.
Shinjae Kang
Read
Why AI Cron Jobs Lie to You: The Exit 0 With Empty Output Pattern
Why a green cron exit can still mean failed work, and how to verify agent jobs by checking useful output instead of process status.
Shinjae Kang
Read
I Swapped My LLM Backend — The API Call Worked on the First Try
A field report on changing an LLM backend cleanly: where provider abstraction helps, where costs shift, and what still needs verification.
Shinjae Kang
Read
Your AI Agent Pipeline Has No Zombie Detection — Here's How to Add It
How to detect zombie AI agent pipelines with freshness checks, artifact validation, and downstream proof instead of trusting running processes.
Shinjae Kang
Read
The AI Coding Agent Arms Race — Why Model Portability Matters More Than Benchmarks
Why model portability matters more than benchmark wins when AI coding tools must survive cost shifts, outages, and real legacy codebases.
Shinjae Kang
Read
AI Agent Frameworks in 2026 — What the Comparison Charts Don't Tell You
A pragmatic guide to choosing AI agent frameworks by operating model, integration cost, lock-in risk, and production failure modes.
Shinjae Kang
Read
Vue 3.6 Vapor Mode — No Virtual DOM, No Rewrite
What Vue 3.6 Vapor Mode changes, why skipping the Virtual DOM matters, and how teams can evaluate it without rewriting existing apps.
Shinjae Kang
Read
Autonomous AI Agents on Cron: A Zombie-Task Postmortem
What actually breaks when you run AI agents on cron 24/7 — zombie tasks, subagent black holes, and the architectural patterns that make autonomous pipelines reliable.
Shinjae Kang
Read
Long-Running AI Agents — From Demos to Production
How to move AI agents from demos to production by adding checkpoints, logs, artifact proof, budget limits, and human-readable recovery paths.
Shinjae Kang
Read
OpenCode Dethroned Cursor — and Claude Fable 5 Got Suspended. What June 2026's AI Coding Shakeup Means for You
OpenCode hit 160K GitHub stars and dethroned Cursor as the #1 AI dev tool. Claude Fable 5 launched with record benchmarks — then got suspended 3 days later. Here's what actually matters for your workflow.
Shinjae Kang
Read
GLM 5.2 Just Became the Best Open-Weights Model — Here's What That Means
Z.AI's GLM 5.2 (744B MoE, 1M context, MIT license) tops open-weights benchmarks and runs coding agents at frontier level. Full breakdown.
Shinjae Kang
Read
How I Dissected 54 Design Systems and Transplanted Linear.app DNA Into My Hugo Blog in One Day
How a Hugo blog adopted a token-driven design system from real references, turning brand choices into reusable CSS and publishing rules.
Shinjae Kang
Read
The quiet consolidation in Korean dev tooling
Three acquisitions in twelve months. Korean dev tools are no longer a fragmented market — they're a small oligopoly, and the API surfaces are starting to look the same.
Shinjae Kang
Read
Stop reaching for a state library
Modern JavaScript runtimes have had structured state primitives for years. You probably don't need a 40KB dependency for what your app actually does.
Shinjae Kang
Read
The Indonesian developer scene is having its Linux moment
Five years of quiet, distributed, community-driven tooling work. The results are starting to show up in the kinds of projects that get adopted outside the country.
Shinjae Kang
Read
A pragmatic review of Hermes Agent after six months
It's a personal AI agent. It's not a product for end-users. With that frame, it works better than anything else I've tried. Here's what works, what doesn't, and when I'd reach for something else.
Shinjae Kang
Read
Why I'm no longer worried about AI replacing senior developers
Two years of watching the field from Jakarta. The replacement threat was always a junior-developer story. The senior-developer story is the opposite of what most people are writing about.
Shinjae Kang
Read