AI: PromptVault - Prompt Library Manager

Model: google/gemini-3-pro-preview
Status: Completed
Cost: $2.09
Tokens: 286,814
Started: 2026-01-02 23:25

06. MVP Roadmap & Feature Prioritization

Strategic execution plan for PromptVault: From concept to enterprise-grade platform.

MVP Definition: The "Git for Prompts"

A centralized prompt library that allows individual engineers to version, organize, and execute prompts against OpenAI, replacing scattered text files.

Must-Have Core Features
  • Prompt CRUD with folder organization
  • Git-style version history & diff view
  • Variable support (e.g., {{customer_name}})
  • Direct execution via OpenAI API (BYOK)
  • Basic response comparison view
Explicitly Excluded from MVP
  • Team collaboration & permissions
  • Multi-provider testing (Anthropic/Google)
  • VS Code Extension
  • Public API access
  • Prompt Marketplace
MVP Success Criteria: 100 Active Users 40% W1 Retention 500 Prompts Saved

Feature Prioritization Matrix

HIGH USER VALUE
LOW USER VALUE
LOW EFFORT
HIGH EFFORT
MVP (PHASE 1)
STRATEGIC (PHASE 2-3)
FILL-INS
AVOID
CRUD
Versioning
OpenAI Run
Variables
Multi-Model
Team RBAC
Analytics
VS Code
Marketplace

Phased Development Roadmap

PHASE 1 Core Utility (Single Player)
Weeks 1-8

Objective: Build the "Digital Notebook" for prompt engineers. Focus on solving the organization and versioning pain points for individual users before adding team complexity.

Feature Priority Effort Week
User Auth (Clerk) + DB Setup P0 Low Wk 1
Prompt Editor & Variables P0 Med Wk 2-3
Versioning System (Diff view) P0 High Wk 4-5
OpenAI "Run" Integration P0 Med Wk 6
PHASE 2 The Testing Lab (PMF)
Weeks 9-16

Objective: Differentiate from Notion/Text files by providing the "Killer Feature": Multi-model testing. Enable users to compare OpenAI vs Anthropic results side-by-side.

Feature Priority Effort Week
Anthropic & Google Integrations P0 Med Wk 9-10
Side-by-Side Comparison UI P0 High Wk 11-12
Stripe Subscription Integration P1 Low Wk 13
PHASE 3 Team Collaboration (Growth)
Weeks 17-24

Objective: Move upmarket to B2B. Enable teams to share libraries, unlocking the viral loop within organizations and higher ACV (Average Contract Value).

  • Team Organizations & Workspaces
  • Role Based Access Control (RBAC)
  • Shared Prompt Libraries
  • Comments & Approval Workflows
  • VS Code Extension (Beta)
  • Public Sharing Links

Technical Leverage (Low-Code/AI)

Strategy: Minimize "undifferentiated heavy lifting" to focus on the prompt engine.

Auth & User Mgmt Clerk
Saves 2 weeks. Handles MFA, social login, and session management out of the box.
Database & Vector Supabase
Saves 1 week. Provides Postgres for relational data + pgvector for future semantic search features.
UI Components Shadcn/UI
Saves 3 weeks. Copy-paste accessible components (Data Tables, Dialogs) rather than building from scratch.

Feature Scoring Model

Priority Score = (User Val × 0.4) + (Biz Val × 0.3) + (Ease × 0.3)

Feature Val Biz Ease Score
Basic Versioning 10 8 7 8.5
OpenAI Run 9 9 6 8.1
Multi-Model Test 9 8 4 7.2
Marketplace 4 7 2 4.3
*Ease: 10 = Easy, 1 = Hard. Score > 7.5 = MVP Candidate.

Execution Timeline (First 16 Weeks)

Month 1: Foundation Milestone: Internal Alpha
Setup
Core CRUD
Month 2: Integration Milestone: Public Beta Launch
OpenAI Integration
Polish
Launch
Month 3: Expansion Milestone: First Revenue
Feedback Loop
Multi-Model Dev
Month 4: Monetization Milestone: Product Market Fit
Payments
Comparison UI

Critical Risks & Mitigations

Risk: LLM Providers build this natively

Mitigation: Focus aggressively on cross-provider workflows. OpenAI won't build a tool to help you use Anthropic.

Risk: API Cost runaway during testing

Mitigation: Phase 1 is BYOK (Bring Your Own Key). Phase 2+ implements strict per-user throttling and caching.

Resource Plan (Pre-Seed)

Team Structure (Months 1-6)
  • Founder: Product, Design, Frontend (React)
  • Engineer 1: Backend, API Integration, DB
  • Contractor: UI Polish (Part-time)
Burn Rate Estimate

~$25k/mo. Key costs: Salaries ($20k), Tech Stack ($500), Marketing/Community ($2k). Runway: 12-14 months.

Go-Live Checklist

Technical
☐ End-to-End Tests Pass
☐ Mobile Responsive Check
☐ Analytics (PostHog) Active
☐ Error Logging (Sentry)
Marketing
☐ Waitlist (Target: 300)
☐ "Prompt of the Day" Content
☐ Product Hunt Assets
☐ Twitter/X Thread Drafted
Legal/Ops
☐ Terms of Service
☐ Privacy Policy
☐ Data Retention Policy
☐ Support Email Setup