StackedCFO — New Release 2026

Do You Really Need a Software Engineer for This?

Vibe Coding for Finance and the Death of Spreadsheets

Every week, finance professionals describe software they need in three minutes, then wait three months for a developer who never comes. The translation layer between business judgment and working code has collapsed. You can build it now.

Get the Book What's inside
60K
Words
33
Chapters
12
App Specs
60+
Prompts
11
Appendices
MRR Month 14
$11.4K
From a weekend build
Status
Operational
Deployed on Vercel
Build Time
45min
Prototype to prototype
Do You Really Need a Software Engineer for This? book cover
The argument

Finance professionals have been describing software for decades. Now they can build it.

The spreadsheet was the best interface available at the time. It gave finance operators enormous leverage over everyone who could not build models. That era produced a generation of finance professionals who think in conditionals, workflows, and outputs. Every conditional is a function. Every data structure is a database schema. Every output is a report.

The interface is changing. The operators who recognize that their finance mental model is already close to a software specification are the ones who will own the next decade of leverage. This book closes the gap.

Eight parts. Eleven appendices.

Built for the operator who does not wait.

Part One
The Mindset Shift
Why finance professionals are the most naturally positioned non-technical operators in the AI era. The psychological barrier and how to demolish it.
3 chapters
Part Two
The Technical Foundation
Node, npm, the terminal, and what an app actually is — filtered for finance operators. Only what you need. Nothing you don't.
2 chapters
Part Three
Building
The six-question workflow framework. The four-lens review. A complete Board Memo Generator walkthrough with real prompts and real failures.
6 chapters
Part Four
Deploying and Charging
Exact DNS configuration for Vercel. Three revenue models for operator-built tools. The path from internal tool to $11,400 MRR.
2 chapters
Part Five
The Finance OS Future
Build outputs, not dashboards. The FinanceOS opportunity. Security, compliance, and what not to build. The tiny team advantage.
5 chapters
Part Six
The Claude Ecosystem
Which tool for which task. Claude Chat vs. Code vs. Cowork vs. Design. The exact handoff pattern for a real operator workday.
5 chapters
Part Seven
Extended Use Cases
Sector-specific apps for healthcare, real estate, and SaaS. Multi-entity consolidation. The fractional CFO practice OS. Advanced prompting.
4 chapters
Part Eight
The Future
What the finance function looks like in five years. The skills that stay irreplaceable. Choosing the right AI model. What went wrong in real builds.
6 chapters
⚡
60+ Production-Ready Prompts
Build prompts, feedback templates, lender memo drafts, LBO quick sizing, covenant waiver letters, board Q&A prep, Cowork automation sequences, and advanced prompting patterns. Organized by function. Ready to paste.
🗺
The 30-Day Build Calendar
Day-by-day instructions from Node.js installation through three deployed applications. With time estimates for every step. An operator who completes it has three live tools and a repeatable build workflow.
📊
Industry Benchmark Reference
Working capital by industry, leverage by sector, covenant structure standards, SaaS metrics benchmarks, and diligence timeline benchmarks. The data you pull from memory in every engagement, organized in one appendix.
📖
Technical Glossary for Finance Operators
45 terms — every word Claude Code will say that a non-developer might not recognize. Backend, authentication, ORM, webhook, TypeScript, deployment. Defined for operators, not engineers.

12 ready-to-run finance app specs.

Each one includes the six-question workflow analysis, a complete starter prompt with sample company data, and a follow-up refinement prompt. Copy, paste, build. The 13-week cash flow OS alone includes a full Meridian Industrial dataset and a lender memo generation spec.

App 01
13-Week Cash Flow OS
For CFOs managing distressed or capital-constrained companies with active lender relationships
Starter prompt included
App 02
Board Memo Generator
For CFOs who spend three hours drafting a memo that follows the same structure every reporting cycle
Starter prompt included
App 03
Covenant Monitoring Dashboard
For finance teams tracking multiple financial maintenance covenants with quarterly and monthly testing
Starter prompt included
App 04
Monthly Close Checklist Manager
For controllers running multi-entity close processes currently tracked in a shared spreadsheet
Starter prompt included
App 05
FP&A Variance Explainer
For FP&A analysts who spend half a Wednesday on variance calculations and narrative every month
Starter prompt included
App 06
Lender Reporting Portal
For companies with ABL facilities that currently assemble borrowing base and compliance packages manually
Starter prompt included
App 07
Diligence Readiness Engine
For CFOs preparing for M&A or financing processes six to twelve months in advance
Starter prompt included
App 08
PE Operating Dashboard
For PE operating partners managing multiple portfolio companies with inconsistent reporting formats
Starter prompt included
App 09
AR Aging and Collections Tracker
For controllers managing receivables where aging lives in one system and collection notes in another
Starter prompt included
App 10
Working Capital Optimizer
For CFOs who want to quantify the cash improvement opportunity before committing resources to it
Starter prompt included
App 11
Scenario Modeling System
For CFOs presenting base, downside, and upside scenarios to boards or investors
Starter prompt included
App 12
Finance Team Restructuring Simulator
For CFOs mapping automation potential by role to build an objective restructuring case
Starter prompt included
The case study — Chapter 13

"She did not hire a developer. She built a lender reporting portal on a weekend. By month fourteen, it was generating $11,400 in monthly recurring revenue."

Composite case study from Part Four: Deploying and Charging

$350
MRR at month one. One subscriber. One client. No developer.
$2.7K
MRR at month six. After repricing from $350 to $449. Eight subscribers.
$11.4K
MRR at month fourteen. Fourteen subscribers. Three hours of maintenance per month.
$425
Total monthly infrastructure cost at peak. Net MRR: approximately $10,975.
Part Six of the book

Which Claude tool for which job. Finally mapped.

The book is the first to map the full Claude product ecosystem specifically for finance operator workflows, including when to hand off between tools and how the seamless day looks in practice.

💬
Claude Chat
Your thinking partner
Reasoning through problems, drafting documents, analyzing information, refining prompts before building. The place you go before you touch a terminal.
Best for: Lender memo drafts, board narrative, prompt stress-testing, architecture decisions
⌨️
Claude Code
Your build environment
A command-line agent that reads, writes, and runs code in your project. Persistent context across files. Agentic loop that executes real actions, not simulations.
Best for: Building apps, debugging errors, deploying to Vercel, iterating on existing codebases
🖥
Cowork
Claude with hands
Operates your desktop applications, manages files, moves data between systems that have no API connection. The tool for automating the last mile of any workflow.
Best for: Monthly document organization, CMS edits, lender package assembly, CRM updates
🎨
Claude Design
Visual output
Web pages, UI mockups, presentations, and visual documents. Iterate visually at speed before committing specifications to code.
Best for: Client portal landing pages, dashboard mockups, visual specifications before building
Appendix E

60+ prompts you can use today.

The prompt library in Appendix E is a working reference, not an introduction. Every prompt is designed to be copy-pasted. Organized by function. Eleven categories. Ready on day one.

Project and Session Management Finance App Build Prompts Lender and Investor Communication Financial Analysis App Quality and Credibility Cowork Automation Claude Design Briefs Debugging and Error Recovery Sector-Specific Templates Advanced Build Patterns LBO Quick Sizing
Prompt Library — COMM-02: Covenant Waiver Request
// Draft a covenant waiver request letter

Company: [name]
Lender: [name]
Covenant breached: [covenant name, definition, threshold, current metric]
Reason: [explain what happened]
Duration: [how long the breach is expected to last]
Remediation plan: [what the company is doing to return to compliance]
Ask: [specific waiver or amendment requested]

// The letter should acknowledge the breach directly
// in the first paragraph. Lead with the remediation plan
// before making the ask. Do not over-apologize.
◎
Author photo
About the author

Casper Zhao

Thirteen years at PwC, BDO, and CFGI conducting Quality of Earnings analyses and building acquisition models on over a hundred transactions alongside PE sponsors, investment bankers, and M&A attorneys. He has sat on both sides of the diligence table more times than he can count.

He is the founder of StackedCFO LLC, a nationally available fractional CFO practice combining Big Four transaction expertise with AI-native financial systems. The AI experimentation this book is built on started in early 2024 as a direct test in his own practice — and changed how he runs it.

casper@stackedcfo.com  |  www.stackedcfo.com

CPA — Massachusetts FMVA CMSA CBCA FPWM StackedCFO LLC Boston, MA
Available now

The operators who start building this year will be two years ahead of the ones who wait.

Pick your format. Every edition includes the full 60,000-word manuscript, all twelve app specs with starter prompts, and the complete prompt library.

Kindle
$14.99
Available on Amazon KDP
Order on Amazon
Paperback
$27.99
6 x 9 print, 300+ pages
Order on Amazon

All purchases support an independent finance operator and author. No corporate publisher. No middleman.