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How to Customize Your SpecZip Blueprint

SpecZip AdminJune 14, 2026

How to Customize Your SpecZip Blueprint

Your Blueprint Is a Starting Point, Not a Prison

When you buy or download a SpecZip blueprint, you are not locked into whatever default choices the author made. Every blueprint is a conversation between you and your AI coding agent — and the /speczip:customize command is how you start it.

The Default Path: `/speczip:build`

The simplest way to use a blueprint is the build command:


/speczip:build

Your agent downloads the ZIP, reads SPEC.md, and starts building immediately using whatever tech stack and configuration the blueprint author specified. This is fast, and for many blueprints, the defaults are exactly what you want.

But what if you want a PostgreSQL database instead of SQLite? What if you prefer Supabase Auth over local auth? What if you want to swap the charting library or add a feature the blueprint didn't include?

That is where /speczip:customize comes in.

The Conversation: `/speczip:customize`


/speczip:customize

This command works just like /speczip:build — your agent downloads and extracts the blueprint ZIP. But instead of going straight to building, the agent pauses and presents your options.

Here is what happens behind the scenes:

1. Your agent reads techstack.json to understand the default technology choices

2. It scans manifest.json for features, dependencies, and configuration details

3. It reviews SPEC.md to understand the full scope

4. It presents a menu of customization options — not a rigid form, but a natural conversation

### Example Conversation


Agent: I've reviewed the CRM Pipeline blueprint. Here's what's customizable:

Tech Stack:
- Database: SQLite (default) → PostgreSQL, Supabase, MySQL
- Auth: Local (default) → Supabase Auth, Auth.js, Firebase
- Styling: Tailwind CSS → CSS Modules, MUI theme
- Charts: Recharts → Chart.js, D3.js

Features:
- Automation rules (included)
- Email notifications (requires SMTP)
- Two-factor auth (not included — add it?)

Infrastructure:
- Docker deployment (default)
- Vercel deployment
- Raw static hosting

What would you like to change?

You reply in plain language. The agent confirms the choices and starts building.

Not All Blueprints Offer the Same Customization

The amount of room for customization depends on the blueprint's complexity.

### Simple Blueprints — Fewer Levers

A single HTML file app like a Pomodoro Timer or Flashcard System has minimal customization surface:

  • **Tech stack:** HTML/CSS/JS — no framework to swap
  • **Database:** localStorage — no server to configure
  • **Features:** Fixed feature set with little to add or remove
  • **Deployment:** Static hosting anywhere

Customizing these means choosing colors, timing presets, or animation styles — not architectural decisions. The value is in the design system and interaction specs, not the technology choices.

### Complex Blueprints — Many Levers

A multi-phase blueprint like a CRM Pipeline, Web DAW, or Stripe Metrics Vault has deep customization across every layer:

Database choices:

|-----------|---------|-------------|

BlueprintDefaultAlternatives
CRM PipelineSQLite + better-sqlite3PostgreSQL, Supabase, MySQL
Web DAWSQLite + IndexedDBSupabase, PostgreSQL, libSQL
Stripe VaultSQLite + DrizzleSupabase, PostgreSQL, Prisma

Authentication:

  • Local auth (default for many blueprints)
  • Supabase Auth (built-in real-time subscriptions)
  • Auth.js (multi-provider: Google, GitHub, SSO)
  • Firebase Auth (mobile-friendly)

AI integrations (for blueprints with LLM features):

  • OpenAI (default) → Anthropic, Groq, local LLMs (Ollama, LM Studio)
  • BYOK (bring-your-own-key) → hosted API

External services:

  • S3 storage → Cloudflare R2, Backblaze, GCS
  • SMTP → SendGrid, Resend, Mailgun, Postmark
  • Webhooks → Slack, Discord, custom endpoints

Phase-level decisions (multi-phase blueprints):

  • Build all phases at once, or stop after phase 1
  • Skip optional phases (e.g., skip automation rules)
  • Rearrange phase order for incremental delivery

Read the Blueprint Before You Customize

The /speczip:customize command reads three key files:

### techstack.json

Every technology choice with alternatives_considered — these are the options the agent will present. Look here to understand what can be swapped.

### manifest.json

The feature list, dependencies, phase structure, and resource requirements. The dependencies array tells you which external services are required vs. optional.

### SPEC.md

The complete feature specification. The agent reads this to understand what is included and what could be added or removed.

### DESIGN.md

The design system. Even if you change the tech stack, the design tokens, color palette, and component patterns stay consistent unless you explicitly ask for a different visual direction.

Tips for Getting the Best Customized Build

### 1. Change Fewer Things at Once

Swapping database, auth, and AI provider all at once introduces risk. Change one layer at a time and let the agent stabilize the build between changes.

### 2. Match Customizations to Your Infrastructure

If your team already uses Supabase, pick it for database and auth — the agent will optimize the blueprint around it. Don't choose PostgreSQL if you do not have a server to host it.

### 3. Use Natural Language

You do not need to memorize every option. Tell your agent what you want in plain English:

> "Use PostgreSQL instead of SQLite, add Supabase Auth, and skip the automation rules phase."

The agent maps your request to the available options and confirms.

### 4. Ask About Trade-offs

Good agents will explain why a choice matters:

> "Sure — swapping Recharts for D3.js gives you more visual control but adds ~5KB to the bundle and requires manual theme configuration."

If the agent does not volunteer trade-offs, ask.

### 5. Phase-Based Blueprints Let You Stop Early

Complex blueprints like Web DAW (4 phases, 8 hours) or CRM Pipeline (5 phases, 4 hours) are designed to be incrementally buildable. Build phase 1, test it, then decide whether to continue.

The Bottom Line

A SpecZip blueprint is a starting point. The /speczip:customize command turns a fixed specification into a conversation. Whether you want to swap one database or reshape an entire stack, your agent is ready to adapt.

Pick a blueprint. Run /speczip:customize. Start talking.