The store

Everything here cites its evidence.*

Three products, built from the same graded library the free site runs on. The research stays free forever — you pay for the decisions, pre-made.

One-time pricing · 14-day refunds, no questions · no subscriptions · we sell the way the evidence says people prefer to buy

$129 · one timeBest value

The Science-Based Software Playbooks*

The evidence, pre-decided. Four build-order playbooks — twenty graded steps, each with a copy-paste prompt your coding agent implements. Open to your situation, do only what makes a large difference, ship the same afternoon.

  • Four playbooks: Pricing Page, Free Trial, First Run, UX Foundations — 148 findings distilled into 20 decisions
  • The companion site: every prompt copyable at each step, signed in with your receipt email
  • Individual downloads plus the Mega Edition — yours to keep, updated when grades move
  • Every future playbook included. One payment, forever.
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Every decision cites its evidence · weak spots labeled, never hidden

$79 · one time

The App Audit*

One prompt. Your coding agent — Claude Code, Codex, or Cursor — runs 38 evidence-graded checks on your actual codebase and writes a report styled like our documents: findings with file locations, a fix plan ordered by leverage, and the research behind every recommendation.

  • 38 checks across nine areas — typography, targets, consistency, hierarchy, disclosure, first run, trial, pricing, trust
  • No invented numbers, by design: anything unverifiable is marked UNVERIFIED, never guessed
  • Runs entirely on your machine — your code never leaves your agent
  • Re-run it before every launch, forever. Registry updates included.
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Experiments cited by design · telemetry labeled as telemetry · conventions labeled as ours

Free · annual

The 2026 Best Practices Report

Our annual readout: seven questions 2026 actually answered, from the study that withdrew its own headline number to the click that search stopped sending. Every stat carries a confidence label; every number was verified or cut.

  • Seven question-led chapters with old-to-new practice tables and "so what do you do" blocks
  • Primary sources fetched and named — METR, GitClear, DORA, Pew, RevenueCat, Cloudflare
  • The dark page: six famous 2026 "facts" that failed our source-check, named so you stop repeating them
Read it now — free Get next year's by email

Free forever · the annual readout stays outside the paywall on purpose

Built the way it tells you to build

This store follows its own playbook.

The pricing research in the library is the pricing policy of the store. If we ever break one of these, screenshot it and email us.

One price, plainly

$129 and $79, once. No countdown, no fake discount, no "only 3 left" — pressure tactics are nearly extinct on the top pricing pages we audited, so they are absent here.

Fear, answered

Pay once, own it forever, every future update included. One email inside 14 days gets a full refund — removing purchase anxiety in writing is our own research talking.

Free stays free

The 690-claim library, the topic deep-dives, and the annual report never move behind the paywall. You pay for decisions, not access to evidence.

Interior-tier highlight, per-month framing, zero urgency theater — the store passes its own PRICE checks