AI: PromptVault - Prompt Library Manager

Model: x-ai/grok-4.1-fast

Status: Completed

Cost: $0.094

Tokens: 264,022

Started: 2026-01-02 23:25

06: MVP Roadmap & Feature Prioritization

MVP Definition

One-Sentence MVP:
A web app for AI practitioners to create, organize, version, and test prompts against multiple LLMs with basic performance comparison.

Core Problem Solved: Scattered prompts without versioning or easy multi-model testing waste hours weekly.

Must-Have Features (5 Core):

Prompt CRUD (create/edit/list/delete)
Basic versioning (save/revert versions)
Folders/tags for organization
Full-text search
Multi-model testing (run prompt on 2-3 LLMs, compare responses)

NOT in MVP: Team collaboration, advanced analytics, VS Code extension, API, marketplace.

MVP Success Criteria

User Success: User creates prompt, versions it, tests across OpenAI/Claude, views side-by-side results in <2 min.

Business Success: 100 users in Month 1; 40% D30 retention; 15% free-to-pro conversion.

Validation Goals: Test if users return weekly for testing (hypothesis: 3+ tests/user/week); PMF if retention >35%.

Feature Inventory (32 Features)

Feature	User Value	Biz Value	Effort	Deps	Category
Prompt Create/Edit	H	H	L	None	Core MVP
Prompt List View	H	H	L	None	Core MVP
Basic Versioning (Save/Revert)	H	H	M	Prompt Edit	Core MVP
Folders Organization	H	M	L	Prompt List	Core MVP
Tags/Metadata	H	M	L	Prompt Edit	Core MVP
Full-Text Search	H	H	M	Prompt List	Core MVP
Multi-Model Test (2-3 LLMs)	H	H	M	Prompt View	Core MVP
Response Comparison View	H	H	L	Multi-Test	Core MVP
User Auth (Email/Password)	M	H	L	None	Core MVP
Dashboard Overview	M	M	L	Auth	Quick Win
Version Diff View	H	M	M	Versioning	Quick Win
Template Placeholders	M	M	L	Prompt Edit	Quick Win
Export Prompt (JSON/TXT)	M	L	L	None	Quick Win
Recent Prompts	M	M	L	Dashboard	Quick Win
Custom Parameters per Test	M	M	M	Multi-Test	Quick Win
Performance Analytics (Basic)	H	H	H	Test Results	Major Init.
A/B Testing Framework	H	H	H	Analytics	Major Init.
Cost Tracking per Run	H	H	M	Test Exec.	Major Init.
Team Shared Library	H	H	H	Auth	Major Init.
Permissions/Workflows	H	H	H	Team Lib.	Major Init.
Activity Feed	M	H	M	Team	Major Init.
Comments on Prompts	M	M	M	Prompt View	Major Init.
Branching for Prompts	M	M	H	Versioning	Nice-to-Have
Semantic Search	M	M	H	Search	Nice-to-Have
VS Code Extension	H	H	H	API	Nice-to-Have
Public API Access	M	H	H	Auth	Nice-to-Have
Webhook Notifications	L	M	M	API	Nice-to-Have
Latency Benchmarks	M	M	M	Analytics	Nice-to-Have
Prompt Marketplace	M	H	H	Team	Nice-to-Have
SSO Login	L	H	H	Auth	Nice-to-Have
Audit Logs	L	H	H	Team	Nice-to-Have
Mobile App	L	L	H	Web App	Nice-to-Have
Dark Mode	L	L	L	None	Nice-to-Have

Categories: Core MVP (10), Quick Wins (6), Major Initiatives (7), Nice-to-Haves (9).

Value vs. Effort Matrix

Prompt Create/Edit

Prompt List

Folders

Feature Prioritization Scores

Formula: Priority = (User Value × 0.4) + (Biz Value × 0.3) + (Ease × 0.3) | H=10/M=5/L=2 | Ease: L=9/M=5/H=2

Rank	Feature	User	Biz	Ease	Score	Phase
1	Multi-Model Test	10	10	5	8.5	MVP
2	Prompt Create/Edit	10	10	9	9.8	MVP
3	Versioning	10	10	5	8.5	MVP
4	Response Comparison	10	10	9	9.8	MVP
5	Search	10	10	5	8.5	MVP
6	Folders	10	5	9	8.5	MVP
7	Tags	10	5	9	8.5	MVP
8	User Auth	5	10	9	7.5	MVP
9	Performance Analytics	10	10	2	6.8	Phase 2
10	Team Library	10	10	2	6.8	Phase 3

Rules: >7.5=P0 (MVP), 6-7.5=P1 (Phase 2), 4-6=P2 (Phase 4), <4=P3 (Backlog).

Phased Development Roadmap

Phase 1: Core MVP (Weeks 1-8)

Objective: Deliver a functional solo-user app for prompt organization, versioning, and basic multi-model testing to validate core value. Prioritizes high-value/low-effort features using low-code stack (Supabase for DB/Auth, Vercel hosting, OpenAI/Anthropic APIs). Unlocks end-to-end workflow: create → version → test → compare. Targets beta with AI practitioners for retention signals. Total effort: 6 weeks engineering + 2 testing.

Feature	Priority	Effort	Week
User Auth	P0	2d	1
Prompt CRUD/List	P0	5d	2
Versioning + Diff	P0	4d	3
Folders/Tags/Search	P0	4d	4
Multi-Test + Compare	P0	7d	5-6
Dashboard + Polish	P1	3d	7

Success Criteria:

✅ End-to-end flow: 70% completion rate
✅ 50 beta users
✅ <5 critical bugs

Deliverable: Beta app live.

Phase 2: PMF Validation (Weeks 9-16)

Objective: Add quick wins and monetization to boost retention/engagement. Integrate Stripe for Pro tier (unlimited prompts/tests). Focus on usage data to refine testing UX. Hypothesis test: Do users run 3+ tests/week? Expand model support (add Google). Build feedback loop for iteration. Drives to 250 users, first revenue.

Feature	Priority	Effort	Week
Stripe Payments	P0	3d	9
Custom Params/Templates	P1	4d	10-11
Export + Recent	P1	2d	12
Basic Analytics	P1	5d	13-14

Success Criteria: 250 users; 35% D30 retention; 10 paid; NPS >30. Deliverable: Monetized product.

Phase 3: Growth & Scale (Weeks 17-24)

Objective: Introduce collaboration for team PMF. Add A/B testing, cost tracking to solidify moat. Optimize for viral growth via shareable test results. Target AI teams; integrate Slack notifications. Scale to 1K users, $3K MRR via community launches.

Feature	Priority	Effort	Week
Team Library/Perms	P0	7d	17-18
A/B Testing	P1	6d	19
Cost/Latency Track	P1	4d	20
Activity Feed	P2	4d	21-22

Success Criteria: 1K users; $3K MRR; Viral >0.3; Churn <7%. Deliverable: Team-ready scaler.

Phase 4: Expansion (Months 7-12)

Objective: Enterprise polish: API, SSO, marketplace. Vertical expansion to agencies. Goal: $15K MRR, Series A metrics.

Key Features: API, VS Code ext, SSO, Marketplace.
Success: 5K users; $15K MRR; Enterprise pilots.

Technical Implementation

AI/ML Components:

Feature	AI Approach	Tools	Complexity	Cost/User
Multi-Test	Parallel API calls	OpenAI/Anthropic	M	$0.15
Analytics	Response scoring	GPT-4o-mini	L	$0.05
Search	Vector embed	PG Vector	M	$0.02

Low-Code Savings (Total: 20 days):

Auth: Supabase (saves 5d)
DB: Supabase Postgres (saves 4d)
Payments: Stripe (saves 3d)
Hosting: Vercel (saves 3d)
Email: Resend (saves 2d)
Analytics: PostHog (saves 3d)

Cost/100 Users/Mo: $250 ($2.50/user) – Hosting $20, DB $30, AI $150, Auth $25, Email $15, Stripe $10.

Stack: Next.js (FE), FastAPI (BE), Supabase (DB/Auth), Vercel.

Development Timeline

W1-2: ████████░░░░░░░░░░░░░░ Foundation (Auth/DB)
W3-4: ░░░░░░░████████░░░░░░ Core CRUD/Version
W5-6: ░░░░░░░░░░░░░██████░░ Testing/Compare
W7-8: ░░░░░░░░░░░░░░░░░████ Beta Launch
W9-12: ░░░░░░░░░░░░░░░░░░░██ PMF Features
W13-16:░░░░░░░░░░░░░░░░░░░░░░ Validation
█=Active | ░=Planning

Milestones:

Milestone 1: Foundation (W2) ✅

✅ Dev env/CI/CD
✅ Auth/DB

Milestone 2: Core Func (W4)

✅ Prompt workflow
✅ AI tests

Milestone 3: Beta Ready (W6)

✅ Testing passed
✅ 20 testers

Milestone 4: Public Beta (W8)

✅ 100 users
✅ Feedback active

Milestone 5: PMF (W16)

✅ 250 users, 35% ret.

Milestone 6: Scale (W24)

✅ 1K users, $3K MRR

Resource Allocation

Phase	Team	FTE
1 (W1-8)	Founder/Dev + Designer PT	1.25
2-3 (W9-24)	+ Full-Stack #2 + Designer	2.5

Skills: React/Next (High Ph1), FastAPI (Med), Prompt Eng (High), Outsource Design/DevOps.

Risk Management

Risk	Severity	Mitigation	Contingency
Scope Creep	🟡	Lock MVP spec W0; parking lot	Cut P2 features
AI Cost/Rel.	🔴	Caching; GPT-3.5 fallback; budgets	Reduce tests
Tech Underest.	🟡	30% buffer; prototype tests W1	+2w timeline
Burnout	🔴	Buffers; outsource	Co-founder
Low Adoption	🔴	Waitlist 500; PH launch	Pivot ICP
LLM Changes	🟡	Abstr. layer; multi-provider	Feature pivot

Launch Strategy

Pre-Launch (W6-7):
Landing/waitlist (500); Demo vid; PH prep; Beta outreach (Reddit r/PromptEngineering).

Beta (W8):
50-100 staged; 24h bug resp; Surveys.

Public (W10):
PH top5; HN/IndieHackers; $500 ads.

Post (W13+):
Cohort analysis; 20 interviews; Iterate.

Success Metrics by Phase

Phase 1	Target
Beta users	50-100
Onboard %	>70%
Usage	>60%

Phase 2	Target
Users	250+
D30 ret.	>35%
Paid	10+

Phase 3	Target
Users	1K+
MRR	$3K+
Viral	>0.3

Post-MVP Vision

Months 4-9: PMF refine; Mobile, integrations; 2.5K users, $10K MRR.
Months 10-15: Enterprise; API/white-label; 10K users, $50K MRR, Series A.
18-24 Mo: Ecosystem platform; Global; Adjacent (agents/tools).