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Double Takes

TDDing with Claude is like having a pair that removes all the failing assertions every time you go to the bathroom.

Steve Jackson

State machines are the answer for those seeking determinism in the era of AI agents.

Dave Mosher

A Slack conversation left Doc reflecting on what bug bashes say about the systems we work in.

Doc Norton

Test-driven development is to programming what double-entry bookkeeping is to accounting.

Neal Lindsay

The fundamental character flaw of the software creator is not the misguided belief that they can solve any problem with software. Instead, it is the belief they can understand how their own software works before they create it.

Steve Jackson

We may need a SaaS appendix for Zawinski's law:

Any SaaS platform attempts to expand until it is a social network.

Matt Jones

A machine in bright colors intakes objects in a large funnel and outputs transformed objects through the bottom

Leadership

Why product operating model transformations stall—and what to do first

Transitioning to a product operating model? Codify your culture first. Principles and trade-offs create the decision-making framework that makes transformation stick. We cannot change what we do not name.

Michael Toland

Product management

communication

product-innovation

professional-growth

scaling-challenges

teams

A ratatouille dish surrounded by cyber bits sits on a wooden kitchen worktable while a team of cooks works in the background

Developers

Anyone can code: Software Is having its Ratatouille moment

Gusteau said it best: "anyone can cook", and now, "anyone can code." LLMs and agentic coding are the Remy to our Linguini. Our job isn't to guard the kitchen—it's to help others cook something worth serving.

Dave Mosher

Future-proof innovative software

ai-ml

founders

consulting

Cover for healthcare sofware challenges report

Leadership

Symptoms to solutions: Biggest software challenges for healthcare in 2026

Test Double gathered insights from healthcare leaders on priorities and challenges. We share a framework to diagnose symptoms and solve the hardest problems in healthcare software.

Cathy Colliver

Maximize software investment

assessments

legacy-modernization

api

efficient software

ROI

Rubber duck stands next to a power up mushroom

Developers

Power up scripts for Rails apps Part 3: Kubernetes

In part 3 of the three part series on Rails scripts, learn about short shell scripts for simplifying Kubernetes interactions from Rails apps.

Ed Toro

Software tooling & tips

aws

devops

productivity

rails

ruby

Rubber duck wearing a trench coat and fedora stands next to a mushroom.

Developers

Power up with Rails scripts Part 2: Docker

In part 2 of the three part series on Rails scripts, learn about short shell scripts for simplifying Docker interactions from Rails apps.

Ed Toro

Software tooling & tips

devops

docker

productivity

rails

ruby

Rubber duck wearing a trench coat and fedora next to a mushroom

Developers

Power up with Rails scripts Part 1: Environment setup

Short shell scripts for simplifying onboarding from Rails apps.

Ed Toro

Software tooling & tips

productivity

rails

ruby

Rubber duck next to a classic marble maze tilt game

Developers

Pydantically perfect: Normalize legacy data in Python

Learn how to normalize inconsistent data structures in Python with Pydantic. The post guides you through different approaches and pitfalls, using Pydantic's alias path and alias choices features.

Gabriel Côté-Carrier

Software tooling & tips

python

data-engineering

legacy-modernization

Team of business professionals runs around an empty office while screaming

Leadership

5 rules to avoid the 95% AI project failure rate

MIT research shows 95% of corporate AI pilots fail. The problem isn't the technology—it's transformation. Based on decades of implementation experience, here are the 5 non-negotiables every C-suite needs to master for AI success.

Ed Frank

Pragmatic AI

ai-ml

communication

leadership

ROI

Insights for great software & great teams

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