AI Development
Harness Engineering: Why “Done” Isn’t the Agent Saying So
In November 2025, Justin Young at Anthropic published a post on what they had learned running long-running coding agents. One observation in that post…
AI Development
AI Development
Skills, Subagents, and the Orchestrator Pattern: The Layer Most Teams Confuse
I had a conversation with a tech lead at a client last quarter that crystallized why this article needed to exist. They had spent…
AI Development
Spec-Driven Development: How to Capture Intent Before You Burn Tokens
In February 2025, Andrej Karpathy tweeted a phrase that stuck: “There’s a new kind of coding I call vibe coding, where you fully give…
AI Development
Plan Mode is the Deal-Breaker: Why Direct-Mode Coding with Agents Wastes Tokens
A few weeks ago I sat with one of our senior engineers while he debugged a project that had gone sideways. The team was…
AI Development
The Three Eras of Software: From Autocomplete to Agentic Development
The framing I keep coming back to is from Andrej Karpathy’s June 2025 talk at YC’s AI Startup School. He called it “Software 3.0”…
AI Development
Google I/O 2026: The Agentic Era is Here, and It’s a Builder’s Moment
Agentic AI is no longer a side feature or an experimental layer on top of existing products. It’s becoming the foundation underneath everything Google…
AI Development
The Third Golden Age of Software Engineering: Field Notes from AI Dev SF 26
I spent April 28 and 29 in San Francisco at AI Dev 26, hosted by Andrew Ng and DeepLearning.AI. Thousands of developers, two days,…
AI Development
Agent Skills: Stop Stuffing Workflows Into Your Rules File
This post assumes familiarity with AI coding agents (Cursor, Claude Code, Windsurf, etc.), basic prompt engineering concepts, and rules files (Cursor’s .cursor/rules/ or Claude…
AI Development
From Testable Code to AI-Driven Testing: How Frontend Developers Can Finally Trust Their Tests
Building reliable frontends by testing user behavior, not implementation details.