AI-POWERED PROJECT MANAGEMENT AND TEAM COLLABORATION SAAS Personalized Step-by-Step Development Roadmap ALPHA: AI-powered project management and team collaboration SaaS application BRAVO: Manage projects, tasks, teams, deadlines, workflows, file sharing, real-time collaboration, notifications, role-based permissions, performance tracking, reports, and AI-assisted productivity insights CHARLIE: Nigeria — English DELTA: Expert Current technology assumptions were checked against official documentation on October 3, 2026. Versions, pricing, API details, plan limits, and provider coverage must still be verified again at implementation time. --- 1. PROJECT UNDERSTANDING The product is a multi-tenant project-management and collaboration SaaS for organizations and teams. Its core responsibilities are: workspace and team management; project creation and organization; task planning and assignment; deadlines and reminders; configurable workflows; comments and collaboration; file sharing; real-time presence and updates; role-based access control; activity tracking; productivity reporting; AI-assisted project analysis; SaaS monetization in a later phase. The application should be architected around one principle: > **PostgreSQL remains the authoritative source of business state. Real-time infrastructure distributes collaboration events but does not replace the primary database.** That distinction prevents task state, permissions, reporting data, and project history from diverging across multiple systems. --- 2. USER CONTEXT Country: Nigeria The product should be designed for Nigerian businesses first while remaining globally extensible. Important design consequences: default commercial currency should be NGN; timezone defaults should support West Africa Time while remaining configurable per workspace; billing infrastructure should support Nigerian merchants; the interface should be mobile-responsive from the beginning; bandwidth consumption should remain modest; destructive actions and uploads should tolerate interrupted connections; background work should not depend on a browser remaining open. The Nigerian Communications Commission reported more than 157 million active GSM internet subscriptions in July 2026, reinforcing the importance of designing primarily for mobile-accessible internet rather than assuming desktop fiber connectivity. Do not attempt full offline multi-user synchronization in the MVP. Collaborative offline editing introduces conflict-resolution complexity that should be addressed only after the online architecture is stable. Technical level: Expert This roadmap therefore avoids elementary programming instruction. Priority is given to: domain boundaries; source-of-truth decisions; transactional consistency; concurrency; tenant isolation; authorization architecture; idempotency; event-driven workflows; observability; security; maintainability; deployment discipline; future scale. --- 3. RECOMMENDED ARCHITECTURE Architectural style Use a modular monolith first. Do not begin with microservices. A well-structured Next.js application backed by PostgreSQL can support a substantial initial SaaS workload while remaining significantly easier to operate. Split services only when measured operational pressure justifies it. High-level architecture USER ↓ NEXT.JS WEB APPLICATION ↓ AUTHENTICATION ↓ SERVER-SIDE AUTHORIZATION ↓ DOMAIN / APPLICATION SERVICES ↓ ZOD VALIDATION ↓ DRIZZLE ORM ↓ NEON POSTGRESQL Collaboration layer: AUTHORIZED USER ↓ PROJECT ROOM AUTHORIZATION ↓ LIVEBLOCKS ├── Presence ├── Comments ├── Mentions ├── Realtime room events └── Collaboration notifications Background execution: DOMAIN EVENT ↓ TRANSACTIONAL OUTBOX ↓ INNGEST ├── Deadline reminders ├── Email notifications ├── AI analysis ├── Digests └── Retryable background work File architecture: USER ↓ SERVER AUTHORIZATION ↓ SHORT-LIVED PRESIGNED URL ↓ CLOUDFLARE R2 AI architecture: POSTGRESQL VERIFIED DATA ↓ SERVER-SIDE AGGREGATION ↓ MINIMIZED PROJECT CONTEXT ↓ OPENAI RESPONSES API ↓ STRUCTURED AI INSIGHT ↓ HUMAN USER Deployment: LOCAL ↓ GIT ↓ GITHUB ↓ VERCEL PREVIEW ↓ HUMAN VALIDATION ↓ VERCEL PRODUCTION ↓ NEON / R2 / LIVEBLOCKS / INNGEST / RESEND Vercel currently provides isolated Preview deployments for non-production branches and can scope environment variables by environment. --- 4. TOOL DECISION TABLE Function Recommended tool Alternative Why selected When needed Primary AI development environment Antigravity IDE VS Code + AI tools Agent-first editor/terminal/browser workflow Start Framework Next.js + TypeScript Remix Full-stack React architecture and Vercel fit Start Runtime Node.js Bun Mature ecosystem Start Package manager npm pnpm Simpler default operational path Start Version control Git — Local history Start Remote repository GitHub GitLab Strong PR and Vercel workflow Start Database Neon PostgreSQL Supabase PostgreSQL Managed PostgreSQL without duplicating auth/realtime tooling Foundation ORM Drizzle ORM Prisma Explicit SQL-oriented TypeScript model Foundation Validation Zod Valibot Typed boundary validation Foundation Authentication Better Auth Clerk Application-controlled auth and organization support Foundation Organization RBAC Better Auth organization access control Custom RBAC Avoid duplicate permission authorities Foundation UI shadcn/ui + Tailwind CSS MUI Flexible product interface Early Design Google Stitch Figma Rapid prototype exploration Early Real-time collaboration Liveblocks Ably Presence, comments, rooms, events and collaboration notifications Core Durable background jobs Inngest Trigger.dev Scheduled and retryable workflows Core Object storage Cloudflare R2 Amazon S3 Private object storage with S3-compatible signed access Core Email Resend Postmark Straightforward Next.js transactional email Core AI productivity insights OpenAI Responses API Anthropic API Structured outputs and tool-capable architecture After reporting Unit/integration testing Vitest Jest Fast TypeScript test workflow Continuous End-to-end testing Playwright Cypress Browser-level permission and workflow testing Before pilot Deployment Vercel Cloudflare Excellent Next.js integration Early Error monitoring Sentry — Runtime observability Before pilot Product analytics PostHog Amplitude Event analytics and feature usage Pilot/later Availability monitoring UptimeRobot Better Stack External uptime checks Production Nigerian SaaS billing Paystack Flutterwave Nigerian recurring-payment support Later Google describes Antigravity as an agentic development platform where agents can plan, execute and verify work across editor, terminal and browser environments. Liveblocks currently provides Next.js-oriented infrastructure for presence, comments, realtime events and notifications. Inngest provides durable Next.js background functions, scheduled execution and retry behavior without requiring a self-managed worker queue. --- 5. TOOLS TO EXCLUDE Supabase Do not add Supabase. Neon provides PostgreSQL, Better Auth provides authentication, and Liveblocks provides collaboration infrastructure. Using Supabase would introduce unnecessary overlap. Prisma Do not use both Prisma and Drizzle. Drizzle is the primary ORM. Claude Code as a second daily development environment Antigravity remains the implementation environment. Claude Code may be used selectively for independent architecture, security or code-review passes. It should not simultaneously modify the same branch while another AI agent is working. Ably or Pusher Do not combine them with Liveblocks unless future requirements expose a capability gap. Firebase Its database and authentication layers would duplicate existing architecture. ngrok Do not install it automatically. Use Vercel Preview endpoints for webhook development whenever practical. Elasticsearch / Algolia Do not introduce dedicated search infrastructure initially. PostgreSQL search is sufficient for the MVP. Redis Do not introduce a cache because it is fashionable. Add one only after profiling establishes a real need. Microservices Not justified for version 1. --- 6. APPLICATION SPECIFICATION Problem solved Teams frequently lose operational visibility because projects, tasks, files, deadlines, conversations and reporting are distributed across unrelated tools. The application centralizes execution and converts operational data into actionable project intelligence. Primary customers startups; SMEs; agencies; NGOs; consulting companies; distributed teams; software teams; construction/project teams; professional-services businesses. Core user journeys Workspace owner Creates workspace → invites members → creates teams → configures permissions → creates projects → reviews portfolio reports. Project manager Creates project → configures workflow → creates tasks → assigns members → sets deadlines → monitors blockers → reviews project health. Team member Views assigned work → changes task state → uploads files → comments → collaborates in real time → receives reminders. Viewer/client Views specifically shared project information without obtaining broader workspace access. --- 7. MVP The MVP should include the following. Workspace management create workspace; workspace slug; timezone; default currency; member invitations; teams; membership status. Authentication email/password; email verification; login/logout; password reset; session management. Social authentication can wait. Roles Initial roles: Owner; Admin; Project Manager; Member; Viewer/Guest. Projects title; unique project key; description; owner; dates; status; visibility; archive state. Workflows Support configurable ordered task statuses. Example: BACKLOG → TODO → IN PROGRESS → REVIEW → DONE Avoid a complete workflow automation engine in the MVP. Tasks title; description; project; status; priority; assignees; creator; start date; due date; subtasks; labels; dependencies; sort position; archived state. Views Implement: List; Kanban board; My Tasks. Calendar and Gantt can wait. Real-time collaboration Include: presence; project-room participants; comments; replies; mentions; live task-update notifications. Liveblocks rooms provide a natural isolation boundary for project-level collaboration. Its access-token flow allows the application server to decide which authenticated users are permitted to enter each room. File sharing task attachments; project files; private storage; controlled download; file metadata; upload limits. Notifications MVP: assignment; mention; task status change; approaching deadline; overdue task; invitation. Channels: in-app; email where appropriate. Reports project completion; tasks by status; overdue tasks; throughput; average cycle time; workload distribution; completed tasks by period; project health indicators. Performance tracking Do not start with opaque employee productivity scores. Track observable operational metrics: work completed; overdue work; cycle time; work in progress; throughput; blocked tasks; project delivery trends. AI should not automatically classify workers as “good”, “bad”, “productive” or “unproductive.” AI insights MVP AI functions: project health summary; risk identification; overdue-work explanation; workload imbalance observations; weekly project summary; suggested priorities. AI remains advisory. --- 8. FUTURE VERSIONS Keep these outside version 1: Gantt charts; calendar view; time tracking; timesheets; advanced resource planning; portfolio management; OKRs; custom fields; workflow automation builder; task templates; recurring tasks; forms; client portals; collaborative documents; whiteboards; Slack integration; Microsoft Teams integration; Google Calendar integration; Google Drive integration; GitHub integration; public API; outbound webhooks; mobile applications; complete PWA offline mode; advanced project forecasting; resource-capacity optimization; AI meeting summaries; AI task generation; AI autonomous project-management actions; enterprise SSO; SCIM; audit exports; data-retention controls; regional hosting; enterprise compliance features. --- 9. INSTALLATION ORDER Use this order: 1. Git 2. Node.js 3. Antigravity 4. GitHub 5. Next.js project 6. Vercel 7. Neon 8. Drizzle 9. Zod 10. Better Auth 11. shadcn/ui / Tailwind 12. Liveblocks 13. Cloudflare R2 14. Inngest 15. Resend 16. Vitest 17. Playwright 18. Sentry 19. OpenAI API 20. PostHog 21. UptimeRobot 22. Paystack later Do not create every external account on the first day. Create each service immediately before integrating it. --- 10. CONNECTION MAP Antigravity Antigravity does not become the production application backend. It edits and tests the application. Antigravity ↓ source code ↓ Git ↓ GitHub GitHub → Vercel GitHub branch ↓ Vercel Preview main ↓ Vercel Production Application → Neon Next.js server ↓ DATABASE_URL ↓ Neon PostgreSQL Application → Better Auth Better Auth executes inside the application and persists auth/organization data into PostgreSQL. Browser ↓ Next.js auth endpoint ↓ Better Auth ↓ PostgreSQL The Better Auth organization plugin currently supports organizations, members, teams, invitations, custom permissions and dynamic roles. Application → Liveblocks User session ↓ Next.js authorization endpoint ↓ project access check ↓ Liveblocks access token ↓ Liveblocks room The business permission decision remains yours. Do not treat Liveblocks room IDs as authorization. Application → R2 Authorized request ↓ server creates signed URL ↓ browser uploads directly ↓ R2 private object Cloudflare R2 currently supports presigned GET, PUT, HEAD and DELETE operations. Application → Inngest domain event ↓ outbox ↓ Inngest ↓ durable function Inngest → Resend Used for delayed and retryable emails. Inngest → OpenAI Use background execution for non-interactive AI analysis. Application → Sentry Errors and traces. Application → PostHog Product-behavior events, preferably added after the application has real users. --- 11. API / CREDENTIAL MAP Credential pattern Purpose Exposure DATABASE_URL Neon connection Server only BETTER_AUTH_SECRET Auth cryptographic secret Server only BETTER_AUTH_URL Auth base URL Configuration LIVEBLOCKS_SECRET_KEY Server-side Liveblocks authorization Server only NEXT_PUBLIC_LIVEBLOCKS_PUBLIC_KEY Only if using a public-key flow where appropriate Public by design R2_ACCOUNT_ID R2 configuration Server R2_ACCESS_KEY_ID R2 API auth Server only R2_SECRET_ACCESS_KEY R2 API auth Server only R2_BUCKET_NAME Object bucket Server configuration INNGEST_EVENT_KEY Inngest event submission Server only INNGEST_SIGNING_KEY Function request verification Server only RESEND_API_KEY Email sending Server only OPENAI_API_KEY AI requests Server only OPENAI_MODEL Selected model Configuration SENTRY_DSN Monitoring According to Sentry SDK design POSTHOG_KEY Product analytics Often browser-visible project key PAYSTACK_SECRET_KEY Billing later Server only NEXT_PUBLIC_PAYSTACK_PUBLIC_KEY Client payment initialization if used Public by design Never put server secrets: in Git; in screenshots; in NEXT_PUBLIC_*; in task descriptions; in AI prompts; in issue trackers; in client JavaScript. If a real secret is exposed: revoke → replace → update environment → redeploy → investigate. Removing it from the latest commit is insufficient. --- 12. STEP-BY-STEP DEVELOPMENT ROADMAP STEP 1 — Establish the repository and engineering rules OBJECTIVE Create a disciplined development foundation. TOOLS Antigravity, Git, GitHub. WHY The application contains permissions, realtime state and asynchronous workflows. Uncontrolled agent edits will become expensive quickly. INSTALL / CREATE Create the Git repository and private GitHub repository. CONNECT TO Antigravity → local repository → GitHub. ACTION Create: AGENTS.md ARCHITECTURE.md SECURITY.md DESIGN.md AGENTS.md should define: plan before modification; minimal scope; tests required; no secret exposure; no client-trusted authorization; no unapproved dependencies; no schema migration without review; preserve existing functionality; list modified files after work. PROMPT FOR ANTIGRAVITY > Review the project requirements and propose an AGENTS.md for this multi-tenant collaboration SaaS. Do not modify application code. Include security, tenant isolation, database migration, testing, dependency, realtime and human-review rules. EXPECTED RESULT Permanent project instructions exist before feature generation. HOW TO VERIFY Have Antigravity explain each rule back from the file. COMMON ERROR Allowing the agent to silently choose architecture feature by feature. HUMAN CHECKPOINT Approve architecture rules manually. NEXT STEP Create the application shell. --- STEP 2 — Create Next.js application and deployment pipeline OBJECTIVE Establish local → GitHub → Preview → Production mechanics immediately. TOOLS Next.js, npm, Vercel. ACTION Use the current supported Next.js App Router workflow. Do not freeze this roadmap to a specific framework version. Next.js currently documents the App Router as its newer router architecture. Deploy the untouched application to Vercel before feature work. PROMPT FOR ANTIGRAVITY > Review the clean Next.js TypeScript application. Propose the production folder structure for a modular multi-tenant SaaS. Do not implement business modules. Identify domain, infrastructure, auth, database, collaboration and UI boundaries. EXPECTED RESULT Local site and Preview deployment both work. HOW TO VERIFY Compare Git commit hash with deployed source. COMMON ERROR Waiting until the end to test deployment. HUMAN CHECKPOINT Approve repository and Vercel connection. NEXT STEP Database foundation. --- STEP 3 — Design the domain model before coding modules OBJECTIVE Prevent task, project and tenant relationships from emerging accidentally. CORE TABLES organizations members teams projects project_members workflows workflow_statuses tasks task_assignees task_labels labels task_dependencies files activity_events audit_logs notification_preferences outbox_events ai_insights Better Auth may own some organization/member/team tables. Do not duplicate those tables if its schema is adopted. Important project fields id organization_id project_key name description owner_id workflow_id visibility status start_at due_at archived_at created_at updated_at Important task fields id organization_id project_id status_id parent_task_id creator_id title description priority start_at due_at completed_at sort_key version archived_at created_at updated_at Concurrency Include a task version or equivalent optimistic-concurrency mechanism. Two users editing the same task should not silently destroy each other's work. Sorting Do not renumber an entire Kanban column on every drag operation. Use fractional ordering or a suitable sortable rank representation. Tenant constraints Where practical, enforce cross-tenant integrity structurally. For example: UNIQUE (organization_id, id) can support composite relationships ensuring a child resource cannot accidentally reference a resource from another organization. Indexes Plan indexes around actual query patterns: (organization_id, project_id, status_id) (organization_id, due_at) (project_id, sort_key) (user_id, task_id) (task_id, dependency_task_id) (organization_id, created_at) DELETE STRATEGY Use archival/soft deletion for: projects; tasks; workflows. Permanent deletion should be a controlled background process. HUMAN CHECKPOINT Approve the schema before migrations. --- STEP 4 — Integrate Neon, Drizzle and Zod OBJECTIVE Establish the authoritative data layer. TOOLS Neon, Drizzle, Zod. CONNECT TO Next.js server → Drizzle → Neon PostgreSQL. ACTION Create separate development and production databases. Prefer a dedicated preview strategy rather than letting arbitrary branches modify production data. Use transactions for operations such as: create task + create assignees + record activity + write outbox...