F4 Simplicity: No line of code is cheaper than the one you didn't write. Reasoning, evidence, the counter-argument and the reply, on Prickles.

F3 Don't Repeat Yourself — Every fact has one home. The second copy is the bug. Reasoning, evidence, the counter-argument and the reply, on Prickles.

Claude Code is an agentic coding tool that reads your codebase, edits files, runs commands, and integrates with your development tools. Available in your terminal, IDE, desktop app, and browser.

S3 Parameter Object — Three parameters, then a struct. Reasoning, evidence, the counter-argument and the reply, on Prickles.

F2 Intention-Revealing Names — The signature is the spec. Reasoning, evidence, the counter-argument and the reply, on Prickles.

F1 Single Responsibility Principle — Every thing should do one thing and one thing only. Reasoning, evidence, the counter-argument and the reply, on Prickles.

Spec-Driven Development. A spec the agent can grade itself against is a contract. A spec the agent has to interpret is a wish.