Writing
Why each layer exists, and what breaks without it
Ten pieces teaching the method in full, plus whatever we learn on the way. No gate, no email required.
The tools aren't the hard part
Why buying the tools and changing nothing around them produces the same cycle times with a bigger bill.
Your codebase outruns your team
What happens when every contributor can mutate shared code faster than the team can synchronise.
Five layers, from roadmap to release
The whole method in one piece, and where each layer's gate sits.
Your product spec is shallow and you can't tell
Why a one-shot PRD reads as complete and is not, and what the check before detailed design actually looks for.
Stop planning the whole product
Phase sizing, and the four questions that force a split.
The fortieth spec problem
Cross-feature drift, and why the rules your system must never break carry IDs.
Green tests, broken product
The test that only ever checks a stand-in, and why an implementer grading their own homework is the wrong gate.
Agent teams without the chaos
Coordinator and worker separation, separate copies of the code, and what a cold walk of the deployed product does that a test suite cannot.
The silent tax on every AI session
Context economy, and what an unbounded context file costs over a project's life.
Which copy is the truth?
One canonical home per document, one way sync, and the gate that stops a stale mirror.