Blog
bot-matrix: a matrix of bot starters
A new portfolio project: bot-matrix — a collection of ready-to-run bot starters. A 'messenger × technology' matrix, nine cells done for a fast start.
June 22, 2026 · 1 min
bots starters boilerplate
Metrics from a real project
Line-count ratios on a commercial project: spec with TDD tests is 3.72× the runtime. The specification is becoming the main locus of effort.
June 16, 2026 · 1 min
sdd tdd metrics
SDD: contract-test TDD with LLMs
My 2023 TDD experiment with ChatGPT: contract tests as living specifications. The insight that seeded Spec-Driven Development.
October 15, 2025 · 2 min
sdd tdd contract-tests
SDD: backstory and Vibe Coding's limits
Vibe Coding tools like Lovable and Replit are great for MVPs, but can LLMs sustain long-lived projects? The backstory of SDD's emergence.
October 14, 2025 · 2 min
sdd vibe-coding brownfield
SDD: a new paradigm for coding with LLMs
SDD is a paradigm where LLMs handle routine coding from specifications. Intro to a series on early Spec-Driven Development experience.
October 13, 2025 · 1 min
sdd llm paradigm-shift