# cto4.ai

> AI and technology insights from a CTO perspective. Blog covering AI engineering, developer tools, and technology trends.

## Site Overview

CTO4.AI is a technology blog focused on AI engineering, developer tools, and insights from a CTO perspective. The blog features in-depth essays, brief thoughts, curated content from elsewhere, and analysis of the latest developments in AI and technology.

## Recent Posts

- [POSSE-Flavored Analytics for the Blog](https://cto4.ai/p/posse-flavored-analytics) (2026-07-14): Self-hosted Umami on my own hardware, no JavaScript beacon, server-side bot filters: analytics, POSSE-style.
- [Voiceprint Is Self-Evolving and Getting Insanely Good](https://cto4.ai/p/voiceprint-case-study) (2026-07-14): From a rough Obsidian note at 8:06 AM to a live post at 8:47: Voiceprint at work, receipts included.
- [I Shot the Email](https://cto4.ai/p/i-shot-the-email) (2026-07-14): The cto4.ai newsletter is dead — killed in self-defense. The web POSSE rides on.
- [Voiceprint: Teaching a Language Model to Write Like Jack](https://cto4.ai/p/voiceprint) (2026-07-12): I reconsidered my no-AI-writing rule and built Voiceprint, a system that authors first drafts in my voice.
- [You Can't Know Claude Code Until You Try Another Coding Harness](https://cto4.ai/p/you-dont-know-claude-code) (2026-07-10): Get outside the Claude bubble: only then will Claude Code's comparative strengths and weaknesses come into focus.
- [Captain America, Q, and the Joker: Samuel Colvin on Coding Agents](https://cto4.ai/p/samuel-colvin-monty-quotes) (2026-07-09): Pydantic founder Samuel Colvin on Latent Space: coding agents as superheroes and the four rules of 100x LLM coding.
- [Where Have I Been? Hermes Agenting, Mostly](https://cto4.ai/p/hermes-agenting) (2026-07-08): I used Hermes Agent and Obsidian to build a knowledge refinery on my idle Mac Mini.
- [A Powerful Google Docs Connector for Claude](https://cto4.ai/p/mcp-mania-google-doc-writer) (2026-03-17): I built a Claude Connector that grants Claude native read-write fluency in Google Docs, over the weekend.
- [December Awakening](https://cto4.ai/p/december-awakening) (2026-03-08): Everything accelerated, again, in Nov-Dec-Jan. Lots of people are noticing.
- [MCP Apps: Custom UIs Inside Claude](https://cto4.ai/p/mcp-apps-in-context) (2026-03-08): MCP Apps bring your custom UIs inside Claude. I built 4 and share what I learned: how they relate to MCPs and skills, rules of thumb, and more.
- [Helping Claude See ... Diagrams](https://cto4.ai/p/claude-eyes) (2026-02-20): I built an MCP that lets Claude see its own Excalidraw diagrams, iterate on them, and save them to Obsidian.
- [The Short, Sweet Life of Clawdbot](https://cto4.ai/p/short-sweet-clawdbot) (2026-02-17): Peter Steinberger's move to OpenAI marks the end of the saga; or Part 1 anyway.
- [I Can Now Improve, Automate, Fix and Document Everything](https://cto4.ai/p/the-workflow) (2026-02-10): Thanks to The Workflow and my AI pair, Claude Opus 4.6.
- [Claude Cowork Now Supports Plugins](https://cto4.ai/p/claude-cowork-supports-plugins) (2026-01-30): Anthropic brings Claude Code's plugin system to Cowork, along with a collection of knowledge work plugins and a slick customization system.
- [Leveling Up Claude Code with Boris Cherny's Help](https://cto4.ai/p/leveling-up-claude-code-with-boris-chernys-help) (2026-01-27): Cherny's thread on how he personally uses Claude Code gave me a roadmap.
- [Skillport: Claude Skill Sharing at Scale](https://cto4.ai/p/skillport) (2026-01-07): Or: How I spent my Christmas vacation.
- [OpenAI Quietly Adopts Skills](https://cto4.ai/p/openai-adopts-skills-via-willison) (2025-12-14): Which makes me happy. Via Simon Willison.
- [Antigravity Gets an A+ on My Browser QA Task](https://cto4.ai/p/antigravity-browser-for-qa) (2025-12-14): Google DeepMind's Antigravity nails a simple autonomous browser QA test of this blog where Claude Code stumbled
- [Kevin Hou on Google DeepMind's Antigravity](https://cto4.ai/p/kevin-hou-antigravity) (2025-12-12): My thoughts on Kevin Hou's talk about Antigravity, DeepMind's new agent-first development platform.
- [Really Sam? Code Red? We Have Questions.](https://cto4.ai/p/sam-altman-code-red) (2025-12-03): Starting with, are you familiar with A Few Good Men?
- [AI Vision vs Computer Vision: Are the Curves Crossing?](https://cto4.ai/p/ai-vision-vs-ml-ocr-are-the-curves-crossing) (2025-12-01): I was wrong about Computer Vision OCR being dead in 2024, but it appears that's about to change as AI Vision rises.
- [Talk Like Ethan Mollick, Matey](https://cto4.ai/p/talk-like-ethan-mollick) (2025-11-26): A Claude Skill that drafts LinkedIn posts from my longer essays, using Ethan Mollick's plainspoken style as a model.
- [Anthropic: Stop Building Agents, Build Skills Instead](https://cto4.ai/p/anthropic-stop-building-agents-start-building-skills) (2025-11-25): A great AIECS session from Barry Zhang & Mahesh Murag, the creators of Anthropic Agent Skills.
- [What If You Don't Need MCP At All?](https://cto4.ai/p/what-if-you-dont-need-mcp) (2025-11-18): Perhaps the best way to lower MCP token overhead is to use Bash CLI tools instead.
- [Claude Skills in Claude Code: A Compleat Guide](https://cto4.ai/p/cursor-rules-to-claude-skills) (2025-11-17): I migrated my Cursor Rules to Skills in Claude Code. Simple, elegant, powerful.
- [These Comments from Vercel CTO Malte Ubl Struck Home](https://cto4.ai/p/vercel-cto-malte-ubl-quotes) (2025-11-14): Vercel CTO Malte Ubl shares wisdom on building AI products: stay humble about user needs, dogfood your abstractions, and pick the right problems for agents.
- [Autonomous Coding Agents: Fire and Forget](https://cto4.ai/p/autonomous-coding-agents-fire-and-forget) (2025-11-11): Autonomous coding agents let you fire off coding tasks and walk away. Safe YOLO mode changes everything.
- [When Claude Code Skates on Thin Ice](https://cto4.ai/p/when-claude-code-skates-on-thin-ice) (2025-11-10): I love Claude Code and Sonnet 4.5, but when training data is thin, the reasoning failures are hilarious
- [Pydantic AI Reaches v1](https://cto4.ai/p/pydantic-ai-reaches-v1) (2025-09-14): Which, for me, begged the question, what exactly is Pydantic AI?
- [ChatGPT 5 Thinking Is So Damn Smart](https://cto4.ai/p/chatgpt-5-thinking) (2025-09-09): I needed to round out my knowledge of Pydantic AI. ChatGPT 5 Thinking absolutely nailed it.

## Content Types

### Essays (39 posts)
Long-form articles with in-depth analysis and insights.
View all: https://cto4.ai/archive

### Briefs (30 posts)
Short-form thoughts and quick observations.

### Elsewhere (28 posts)
Curated content and commentary on external articles.

### Quotes (7 posts)
Notable quotes and reflections.

### Episodes (5 posts)
Podcast and video reviews and analysis.

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## About the Author

Jack Ivers is a fractional CTO and technology consultant with expertise in AI engineering, software architecture, and technology strategy. This blog shares insights from working with startups and enterprises on their technology challenges.

## Services Offered

- Fractional CTO services
- AI strategy and implementation
- Technology architecture consulting
- Engineering team leadership
- Product development guidance

Learn more: https://cto4.ai/services

## Contact & Social

- Website: https://cto4.ai

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