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Writing
Notes, essays, and posts on product, AI, full-stack learning, and whatever’s been on Jonlin’s mind.
- May 20, 2026 · 5 min read
Cost Awareness Is Part of Implementation
- May 20, 2026 · 5 min read
Split Parallel Decisions into Parallel Sessions
- May 20, 2026 · 5 min read
When Docs Lie, Read the Source
- May 20, 2026 · 6 min read
CLAUDE.md Is Your Project's Runbook
- May 20, 2026 · 5 min read
Production Surfaces Bugs Your Tests Can't
- May 20, 2026 · 4 min read
When the Obstacle Isn't the Real Obstacle
- May 20, 2026 · 5 min read
Scope Discipline: One 12-Item Request, Three Focused PRs
- May 9, 2026 · 6 min read
Real-time documentation: writing while you build, not after
CLAUDE.md, BACKLOG.md, and WORKING-WITH-JONLIN.md weren't documentation in the after-the-fact sense. They were a load-bearing part of how I built. Here's why.
- May 9, 2026 · 7 min read
Two-model architecture: Haiku for chat, Sonnet for assessment
Same site, two AI features, two models. The decision wasn't about cost — it was about matching the model to the task. Here's the framework.
- May 3, 2026 · 4 min read
Recommendation + Tradeoff Beats a Menu Every Time
- May 3, 2026 · 5 min read
Explicit Guardrails Become Persistent Guardrails
- May 3, 2026 · 4 min read
The Outage That Turned into a Memory File
- May 1, 2026 · 4 min read
From a PRD to a Deployed Multi-User Web App in Four Days
- April 27, 2026 · 2 min read
How a Karaoke Song Became a Language Learning Tool
Studying to sing