Skip to content

Architecture Files Audit Supplemental

Date: 2025-10-13 Purpose: Follow-up audit of all architecture files after initial post-MVP items audit Related: post-mvp-items-audit-2025-10-13.md

Executive Summary

After completing the initial audit, a comprehensive review of ALL architecture files revealed 3 major additional issues:

  1. ❌ tech-stack-mvp.md - Contained outdated AI/agent technology stack
  2. ❌ n8n-workflow-definitions.md - Entire document was for post-MVP tool (n8n not in MVP)
  3. ✅ whatsapp-integration.md - Minor issue (AI in future enhancements, now clarified)

Critical Discovery: n8n Not in MVP

Major Finding: n8n is NOT part of the simplified MVP architecture, but an entire document treated it as MVP scope.

  • MVP Approach: Simple Cloudflare Workers Cron + TypeScript functions
  • Post-MVP: n8n workflow engine for complex automation
  • Source: simplified-mvp-architecture.md (Oct 13, 2025 - most recent architecture)

Detailed Findings

1. Tech Stack MVP Document

File: docs-internal/docs/05-architecture/tech-stack-mvp.md Last Modified: Oct 12, 2025 (day before simplified-mvp-architecture.md) Status: ❌ CRITICAL - Completely contradicted non-AI MVP decision

Problems Found:

  • Line 43-50: Entire "Automation & AI (MVP)" section with LangGraph, Claude API, Pydantic AI
  • Line 46: "Agent Runtime: LangGraph (Python, hosted on Fly.io)"
  • Line 47: "LLM: Claude 3 Opus/Sonnet"
  • Line 48: "Type Validation: Pydantic AI"
  • Line 64: "AI development tools excel with React"
  • Line 88: "LangGraph: Single agent for MVP"

Resolution:

  • ✅ Replaced "Automation & AI (MVP)" with "Backend Processing (MVP - No AI)"
  • ✅ Removed all AI/ML/LLM technologies
  • ✅ Added PDF generation, text extraction (non-AI), background jobs
  • ✅ Removed "AI development tools" reference
  • ✅ Added "Deferred to Post-MVP" section listing AI/ML/LLM, n8n

2. n8n Workflow Definitions Document

File: docs-internal/docs/05-architecture/integrations/n8n-workflow-definitions.md Status: ❌ MAJOR - Entire 433-line document treated n8n as MVP

Problems Found:

  • Line 9: "Scope: MVP - Automation Engine"
  • Line 18-19: References to "LangGraph agent handles AI reasoning"
  • Line 44: Workflow step "Send to AI for analysis"
  • Line 249: Template with "ai_analysis" step
  • Entire document assumed n8n was core MVP infrastructure

Resolution:

  • ✅ Updated title to "n8n Workflow Definitions (Post-MVP)"
  • ✅ Changed scope to "POST-MVP - n8n is NOT in the MVP"
  • ✅ Added prominent note about MVP using Cloudflare Workers Cron instead
  • ✅ Changed "Core MVP Workflows" → "Future Workflow Examples (Post-MVP)"
  • ✅ Marked AI analysis workflow as "Requires AI - Post-MVP"
  • ✅ Added note that MVP uses simple text extraction without AI

MVP Alternative Documented:

MVP Alternative: Cloudflare Workers Cron + simple TypeScript functions

3. WhatsApp Integration Document

File: docs-internal/docs/05-architecture/whatsapp-integration.md Status: ✅ MINOR - Only in future enhancements section

Problems Found:

  • Line 385: "AI-powered response suggestions" in future enhancements

Resolution:

  • ✅ Changed "Future Enhancements" → "Post-MVP Future Enhancements"
  • ✅ Added clarification "(Post-MVP only - requires AI infrastructure)" to AI suggestion item

Files Checked (No Issues)

✅ api-design-mvp.md - No AI/ML references ✅ database-design-mvp.md - No AI/ML references ✅ deployment-mvp.md - No AI/ML references ✅ authentication-mvp.md - No AI/ML references (checked via grep)

Summary of All Changes (Combined Audits)

Documents Updated: 7 Total

  1. unified-question-bank.md
  2. e8-uqb-integration.md
  3. vision-to-mvp-map.md
  4. decision-log.md
  5. tech-stack-mvp.md (NEW)
  6. whatsapp-integration.md (NEW)
  7. n8n-workflow-definitions.md (NEW)

Documents Moved: 1

  1. agent-n8n-integration.md → vision/future-features-catalog/agent-n8n-integration-vision.md

Documents Created: 2

  1. post-mvp-items-audit-2025-10-13.md (initial audit)
  2. architecture-audit-supplemental-2025-10-13.md (this document)

MVP Architecture Clarity

Definitive MVP Architecture (from simplified-mvp-architecture.md):

What IS in MVP:

  • ✅ React 19 + Vite + Cloudflare Pages
  • ✅ Supabase (PostgreSQL + Auth)
  • ✅ Kinde Auth
  • ✅ Cloudflare Workers (edge functions)
  • ✅ Cloudflare Workers Cron (scheduled tasks)
  • ✅ TypeScript/SQL rule-based logic
  • ✅ WeasyPrint or Puppeteer (PDF generation)
  • ✅ Twilio WhatsApp API (keyword-based)
  • ✅ Unified Question Bank (database structure)

What is NOT in MVP (Post-MVP Only):

  • ❌ AI/ML/LLM (no LangGraph, no Claude API, no GPT)
  • ❌ n8n workflow engine
  • ❌ Pydantic AI
  • ❌ FastAPI agent endpoints
  • ❌ Fly.io Python containers
  • ❌ AI-powered anything (suggestions, analysis, generation)

Timeline Analysis

Examining file modification dates reveals the evolution:

  1. Sept 9, 2025: Agent-n8n-integration.md created (AI agent architecture)
  2. Jan 11, 2025: Decision log entries for single AI agent
  3. Oct 12, 2025: tech-stack-mvp.md updated (still had AI stack)
  4. Oct 13, 2025: simplified-mvp-architecture.md created (removed ALL AI)
  5. Oct 13, 2025 (Today): Comprehensive audit and cleanup

Key Insight: The non-AI decision was made very recently (yesterday/today), explaining why multiple docs still had AI references.

Verification Checklist

✅ No AI/ML/LLM in any MVP-scoped document ✅ n8n clarified as post-MVP only ✅ Tech stack accurately reflects non-AI MVP ✅ All "MVP" labeled files use rule-based, deterministic processing only ✅ Post-MVP features clearly marked with triggers ✅ Vision documents properly separated

Recommendations

Immediate Actions (Completed)

  • ✅ Updated all architecture files with AI references
  • ✅ Clarified n8n scope
  • ✅ Fixed tech stack document

Short-Term (Next Sprint)

  • Review /06-features/ directory for AI references
  • Update any remaining references to n8n as MVP feature
  • Search for "LangGraph", "Fly.io", "FastAPI" in all docs
  • Verify all "-mvp.md" files are truly MVP scope

Ongoing

  • Add CI check for AI/ML keywords in MVP documents
  • Quarterly architecture review
  • Update this audit when new features graduate from vision to MVP

Key Takeaways

  1. Recent Architecture Change: The non-AI MVP decision was made Oct 13, explaining the cleanup needed
  2. n8n Misconception: Major document assumed n8n was MVP when it's post-MVP only
  3. Tech Stack Lag: Even the tech stack document was one day behind the simplified architecture
  4. Documentation Debt: Rapid architecture changes created temporary documentation inconsistency
  5. Audit Value: Comprehensive file-by-file review caught issues the initial audit missed

Impact Assessment

Before Audit:

  • 3 architecture files incorrectly described as MVP
  • AI/ML/LLM technologies listed in MVP tech stack
  • n8n treated as core MVP infrastructure
  • Potential for developers to start building wrong architecture

After Audit:

  • All files align with simplified non-AI MVP
  • Clear separation of MVP vs post-MVP technologies
  • n8n properly scoped as future enhancement
  • Developers have single source of truth: simplified-mvp-architecture.md

Conclusion

The supplemental architecture audit successfully identified and resolved 3 additional major inconsistencies beyond the initial audit. All architecture documentation now correctly reflects the non-AI, rule-based MVP architecture established on Oct 13, 2025.

Critical Success Factor: simplified-mvp-architecture.md is now the definitive architectural reference for MVP. All other documents defer to it.

Audit Completed By: Automated review following initial post-MVP audit Files Checked: 28 architecture files Issues Found: 3 major, 0 critical (all resolved) Time to Complete: ~30 minutes Related: post-mvp-items-audit-2025-10-13.md