Free Guide
40 pages · 12 chapters · 8 industry playbooks.
NEW · 31-page Skills Report 2026 (free PDF) →
160+ tested Claude prompt codes. Only 7 actually shift reasoning. The rest change how Claude sounds, not what it thinks.
I ran controlled A/B tests over three months — fresh contexts, fixed task batteries, blind-rated outputs. Here's the research, the free report, and the tools built on top of it.
Buying for your team? Skills 5-Seat Team Pack, $199 →
Not sure where to start? Take the 2-min audit quiz →
4.9 · 46 verified buyers
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Instant deliveryL99 · Kill the Hedge
Forces decisive, committed answers. No “it depends”.
− Before
It might be worth considering, perhaps, some of the trade-offs — though of course there are many ways to look at it.+ After
Trade-off: faster ship, weaker tests. Ship it. Harden in week 2.Token delta−38%Decisiveness +2 tiers
Works with•Claude Sonnet 4.6•Opus 4.7•Haiku 4.5•Claude Code 2.x
What we sell
Four products. All built on the same research.
One-time pricing. Lifetime updates. No subscriptions, no seat counts, no upsells.
Cheat Sheet
160+ tested codes with before/after and token deltas.
Plugin
5 slash commands + 7 skills for Claude Code.
Sales Agent Pack
10 founder-voice desktop app. Local-first, BYO key.
Industry prompt packs — $49 each
7 vertical packs replacing $300-1,200/mo SaaS tools.
Each pack ships 50 tested Claude prompts for one profession, organized by role, installable as Claude Code skills. $49 one-time vs the $300-1,200/mo vendors you would otherwise rent the same patterns from.
SAP Pack
50 prompts for Basis, ABAP, Functional, Architect.
Salesforce Pack
50 prompts for Apex, LWC, Flow, Architect.
Legal Pack
Solo/GP, Litigation, Transactional, Practice Mgmt. Vs Harvey $1,200/mo.
Recruiter Pack
Sourcer, Recruiter, TA Ops, Agency Owner. Vs Fetcher $649/mo.
Real Estate Pack
Listing, Buyer, Lead Gen, Brokerage. Vs Lofty $500/mo.
Clinical Pack
Documentation, Specialty, Patient Comm, Ops. Vs DAX $400/mo.
CPA / Tax Pack
Tax Prep, Audit, Bookkeeping, Client Comm. Vs TaxGPT $249/mo.
Bundle: 3 Packs
Pick any 3 packs. See all 7 on the pricing page.
AI Wrappers · 5 free + 15 paid · bundle $99
Ready-to-ship AI apps with the free open-source path included.
Each wrapper: working code + layman guide on swapping the commercial API for a free open-source model (Llama, Whisper.cpp, rembg). Try the demos in your browser, then download.
Text Summarizer
Free — paste text, get TL;DR + bullets. Live demo in your browser.
Email Reply Drafter
Free — 3 reply variants (direct, warm, decline). Demo in browser.
Meeting Notes Summarizer
Free — transcript to decisions + action items. Demo in browser.
See all 20 wrappers
2 more free + 15 paid at $20 each. Bundle: $99 for all 15 paid.
Done-for-you
Prompt Audit $499 · Custom Agent Build $2,000+
Two fixed-price engagements I run personally — no SDR, no discovery-call gauntlet.
What buyers say
Real testimonials. Real buyers.
“Genuinely the first prompt resource I've used where the author admits half the famous tricks are placebo. The before/after examples settle arguments with my team in seconds — we stopped cargo-culting whatever tweet went viral that week.”
More incoming. Real verified-buyer quotes only — we do not pad this section. Bought something? Reply with a one-line quote and we will add it here (and send a thank-you bonus).
Why this site exists
I tested 120 popular Claude codes for three months. Most don't work.
Every “Claude pro tip” thread on the internet is someone's hunch. I got tired of arguing about it, so I built a rig: fresh contexts per trial, a fixed battery of 24 tasks across writing, coding, and analysis, outputs rated blind by three reviewers on decisiveness, accuracy, and token efficiency.
Forty-seven percent of the widely-shared codes showed no significant lift over a plain prompt. The other 53% did — and a handful were genuinely big. The cheat sheet is those 53%, with the failure modes documented for the rest.
Read the full methodology →