STACK & SHIP · SOLO FOUNDER TOOLS

Help stop your AI agent shipping Supabase and Stripe bugs

Ship-Ready AI Rules is $1.30 (UK $1.56 incl. VAT) for the first 10 buyers with ONEPOUND; after that it's $19. Launch Audit has its own code: ONEPOUND-AUDIT.

Use code ONEPOUNDSee Ship-Ready AI RulesRead the blog
AGENTS.md rules, a verified Stripe webhook handler and 5 passing tests

Start free

Supabase + Stripe Security Checklist

20 checks for AI-built Next.js apps: RLS, service keys, webhook signatures. PDF, free.

Get the free checklist

Enter $0 to get the download by email. Want tips and news about new kits (about 2 emails a month)? Follow Stack & Ship on Gumroad. It's optional, and you can unsubscribe in one click any time. Stack & Ship (UK sole trader) sends these via Gumroad.

Kits

Ship-Ready AI Rules preview

AI RULES · NEXT.JS + SUPABASE + STRIPE

Ship-Ready AI Rules

3 guardrail hooks, 18 Claude Code skills and 6 subagents, plus Cursor rules and AGENTS.md, for Next.js, Supabase and Stripe.

3 guardrail hooks · 18 Claude Code skills · 6 subagents · Cursor rules + AGENTS.md · demo app with hook tests

For developers using Cursor or Claude Code on Next.js, Supabase and Stripe.

v2 $19 one-off · free for v1 owners · free sample on GitHub

Solo Founder OS preview

NOTION · LITE FREE / PRO $29

Solo Founder OS

A connected Notion workspace for solo founders: projects, tasks, revenue with MRR and VAT, expenses, subscriptions and profit per product.

Projects · tasks · revenue + MRR · expenses · subscriptions · profit per product

For solo founders who want MRR and profit per product without accounting software.

Free Lite · $29 Pro

UK Sole Trader Self-Assessment Tracker 2026/27 preview

SPREADSHEET · UK 2026/27

UK Sole Trader

Google Sheets and Excel tracker for UK sole traders: income, expenses, mileage, use of home, income tax and Class 4 NI estimates.

Income · SA103 expenses · mileage · use of home · tax + Class 4 NI estimate

For UK sole traders who want tidy 2026/27 records and a tax estimate.

£12 one-off

Launch Audit preview: 28 checks for secrets, auth, RLS and Stripe; AI auditor (no file-editing tools) verifies hits; writes LAUNCH-AUDIT.md

LAUNCH AUDIT · NEXT.JS + SUPABASE + STRIPE

Launch Audit

/audit scans your Next.js + Supabase + Stripe app with 28 checks, verifies every hit with an AI auditor with no file-editing tools, and writes LAUNCH-AUDIT.md with fixes.

/audit · 28 checks · LAUNCH-AUDIT.md · no file-editing tools

$12

Paid MCP Starter preview: A remote MCP server with API keys, a free tier, Stripe usage-based billing, rate limits, and a usage dashboard on Next.js + Supabase.

MCP STARTER · SDK v2 · SPEC 2026-07-28

Paid MCP Starter

A remote MCP server with API keys, a free tier, Stripe usage-based billing, rate limits, and a usage dashboard on Next.js + Supabase.

MCP SDK v2 · Streamable HTTP · Stripe Billing Meters · 42 tests

$49 one-time

Ship It Bundle preview: AI Rules v2, Launch Audit and Solo Founder OS Pro in one checkout: $39 instead of $60 separately.

BUNDLE · 3 KITS

Ship It Bundle

AI Rules v2, Launch Audit and Solo Founder OS Pro in one checkout: $39 instead of $60 separately.

AI Rules v2 · Launch Audit · Solo Founder OS Pro

$39

Why Stack & Ship

Most developer kits sell a promise. We'd rather sell something you can run the same afternoon. Every Stack & Ship kit is small on purpose: it does one job for one kind of person, it ships with the proof that it works, and it says plainly where it stops. If you build and sell software on your own, your time goes on the product, not on setting up the tools around it. The AI rules exist because coding agents get Next.js, Supabase and Stripe apps running quickly but repeat the same security mistakes: the service key in a page, tables without row level security, webhooks that are never verified. The Notion system exists because one revenue total hides which product is working. The UK tracker exists because self assessment shouldn't need a spreadsheet you build from scratch every April.

Works out of the box.

Every kit ships with something you can run: a reference app that builds, tests that pass, a walkthrough.

Honest about limits.

Every product page has a "What this doesn't do" box, listing what has and hasn't been tested.

Fair, one-off prices.

Pay once on Gumroad. It's the merchant of record, so receipts and VAT are handled there.

From the blog

Fixes first, kits last. Guides on secure AI-assisted coding, Notion systems, and tool costs.

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