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TekTree Functional Requirements

Version: 1.0.0 Last Updated: 2025-12-16 Status: Foundation (Pre-Implementation)

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Document Purpose

This document defines the functional requirements for TekTree, organized by domain and feature area. Each requirement includes user stories, acceptance criteria, and priority classification.

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Priority Classification

• P0 (Critical): MVP blocker, must have for launch
• P1 (High): Important for user experience, launch within 30 days
• P2 (Medium): Valuable enhancement, launch within 90 days
• P3 (Low): Nice to have, future consideration

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1. User Management & Authentication

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FR-1.1: User Registration

Priority: P0 User Story: As a new user, I want to create an account so that I can start building my knowledge tree. Acceptance Criteria:

• User can register with email and password
• Email verification required before full access
• Password must meet complexity requirements (min 8 chars, 1 uppercase, 1 number, 1 special)
• Duplicate email detection with helpful error message
• Welcome email sent on successful registration
• Free tier subscription automatically created
• Initial 100 XP welcome bonus awarded

Domain Events:

• user.registered
• user.email.verification.sent
• gamification.xp.earned (welcome bonus)

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FR-1.2: User Authentication

Priority: P0 User Story: As a registered user, I want to log in securely so that I can access my personalized content. Acceptance Criteria:

• Email + password authentication
• JWT access token (15min expiry) + refresh token (7 days expiry)
• Refresh token stored in HTTP-only cookie
• Failed login attempts tracked (max 5 attempts, 15min lockout)
• “Remember me” option extends refresh token to 30 days
• Logout invalidates tokens

Domain Events:

• user.authenticated
• user.login.failed
• user.locked.out

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FR-1.3: User Profile Management

Priority: P0 User Story: As a user, I want to customize my profile so that others can learn about my expertise. Acceptance Criteria:

• Editable fields: firstName, lastName, handle, image, bio
• Handle uniqueness validation
• Image upload (max 5MB, JPEG/PNG/WebP)
• Profile visibility settings (public, connections only, private)
• Profile view counter
• Public profile URL: /u/:handle

Domain Events:

• user.profile.updated
• user.handle.changed
• user.avatar.uploaded

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2. Knowledge Management

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FR-2.1: Create Knowledge Areas

Priority: P0 User Story: As a user, I want to organize my knowledge into hierarchical areas so that I can structure my learning path. Acceptance Criteria:

• Create top-level areas (e.g., “Programming”, “Design”)
• Create nested sub-areas (max depth: 5 levels)
• Area properties: title, description, tags, visibility
• Parent-child relationships with breadcrumb navigation
• Area URL: /area/:id/:slug
• Tag autocomplete based on popular tags
• Rich text editor for descriptions (Markdown support)

XP Rewards:

• Create first area: +10 XP
• Create area with 5+ sub-areas: +25 XP

Domain Events:

• knowledge.area.created
• knowledge.area.updated
• knowledge.area.moved (parent changed)

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FR-2.2: Post Questions

Priority: P0 User Story: As a learner, I want to post questions in relevant areas so that I can get expert answers. Acceptance Criteria:

• Question form: title, body, tags, area selection
• Attach files (max 10MB, PDF/images)
• Mark as public or private
• Question owner can accept best answer
• Question owner can close/reopen question
• Edit history tracked
• Question URL: /question/:id/:slug

XP Rewards:

• Post first question: +5 XP
• Question receives 5+ upvotes: +20 XP
• Question marked as “quality” by moderator: +50 XP

Domain Events:

• knowledge.question.posted
• knowledge.question.edited
• knowledge.question.closed
• knowledge.answer.accepted

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FR-2.3: Share Insights

Priority: P0 User Story: As an expert, I want to share insights in my areas of expertise so that I can contribute to the community. Acceptance Criteria:

• Insight form: title, body, related areas, tags
• Attach resources (links, files, code snippets)
• Insight types: Article, Tutorial, Case Study, Tool Review
• Rich media embedding (YouTube, Twitter, GitHub Gists)
• Collaborative editing (co-authors)
• Version history
• Insight URL: /insight/:id/:slug

XP Rewards:

• Publish first insight: +25 XP
• Insight gets 10+ likes: +50 XP
• Insight added to 5+ user pinboards: +100 XP

Domain Events:

• knowledge.insight.published
• knowledge.insight.updated
• knowledge.insight.co-author.added

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FR-2.4: Start Discussions

Priority: P1 User Story: As a user, I want to start discussions on topics I’m interested in so that I can engage with the community. Acceptance Criteria:

• Discussion form: question, description, poll options (optional)
• Tag-based discovery
• Threaded comments (max depth: 3 levels)
• Pin important comments
• Mark discussion as resolved
• Follow/unfollow discussions
• Discussion URL: /discussion/:id/:slug

XP Rewards:

• Start first discussion: +10 XP
• Discussion reaches 20+ comments: +30 XP

Domain Events:

• knowledge.discussion.started
• knowledge.discussion.comment.added
• knowledge.discussion.resolved

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FR-2.5: Share Resources

Priority: P1 User Story: As a user, I want to curate and share valuable resources so that others can benefit from my findings. Acceptance Criteria:

• Resource types: Link, Document, Video, Book, Course, Tool
• Metadata: title, description, URL, author, tags, areas
• Resource preview (Open Graph metadata)
• User ratings and reviews
• Resource collections (playlists)
• Resource URL: /resource/:id/:slug

XP Rewards:

• Share first resource: +5 XP
• Resource receives 10+ saves: +20 XP

Domain Events:

• knowledge.resource.shared
• knowledge.resource.rated
• knowledge.resource.saved

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3. Social Interactions

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FR-3.1: Like Content

Priority: P0 User Story: As a user, I want to like valuable content so that I can show appreciation and help surface quality. Acceptance Criteria:

• Like/unlike any content type (question, insight, discussion, resource)
• Like count displayed prominently
• User can view their liked content history
• Content author notified of likes (configurable)
• Prevent self-liking

XP Rewards (for content author):

• First like received: +2 XP
• 10th like: +10 XP
• 100th like: +50 XP

Domain Events:

• social.content.liked
• social.content.unliked

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FR-3.2: Comment on Content

Priority: P0 User Story: As a user, I want to comment on content so that I can provide feedback and engage in discussions. Acceptance Criteria:

• Comment on questions, insights, discussions, resources
• Threaded replies (max depth: 3 levels)
• Rich text formatting (Markdown)
• Edit comments within 15 minutes
• Delete own comments anytime
• Report inappropriate comments
• Comment URL: Direct link with anchor #comment-:id

XP Rewards:

• First comment: +3 XP
• Comment receives 5+ likes: +10 XP
• Comment marked as “helpful” by author: +15 XP

Domain Events:

• social.comment.added
• social.comment.edited
• social.comment.deleted
• social.comment.reported

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FR-3.3: Vote on Content

Priority: P1 User Story: As a user, I want to upvote/downvote content so that quality content rises to the top. Acceptance Criteria:

• Upvote/downvote on questions, answers, insights
• Vote changes allowed within 5 minutes
• Vote score = upvotes - downvotes
• Content sorted by vote score + recency algorithm
• Downvote requires reason selection (off-topic, low quality, spam)
• Voting power based on user reputation (min 50 XP to downvote)

XP Rewards (for content author):

• Net +5 votes: +10 XP
• Net +10 votes: +25 XP
• Net +50 votes: +100 XP

Domain Events:

• social.content.upvoted
• social.content.downvoted
• social.vote.changed

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FR-3.4: Follow Users and Areas

Priority: P1 User Story: As a user, I want to follow interesting users and areas so that I stay updated on relevant content. Acceptance Criteria:

• Follow/unfollow users
• Follow/unfollow areas
• Followers/following counts on profile
• Notification preferences per follow (all, important, none)
• Feed aggregation of followed content
• Feed URL: /feed

XP Rewards:

• Get 10 followers: +25 XP
• Get 100 followers: +200 XP

Domain Events:

• social.user.followed
• social.user.unfollowed
• social.area.followed

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4. Gamification Features

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FR-4.1: XP (Experience Points) System

Priority: P0 User Story: As a user, I want to earn XP for my contributions so that my progress is recognized and I feel motivated. XP Earning Rules: Acceptance Criteria:

• Real-time XP updates via WebSocket
• XP transaction history with details
• XP leaderboard (global, area-specific, weekly)
• XP displayed on user profile and avatar
• Daily cap prevents gaming system
• XP decay for inactive users (5% per month)

Domain Events:

• gamification.xp.earned
• gamification.xp.transaction.recorded

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FR-4.2: Levels and Progression

Priority: P0 User Story: As a user, I want to level up as I earn XP so that I can unlock new features and show my expertise. Level Progression: Acceptance Criteria:

• Level displayed on profile and all content contributions
• Level-up animation and notification
• Feature gating based on level
• Level-specific profile badges
• Level progression bar

Domain Events:

• gamification.level.up

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FR-4.3: Achievement System

Priority: P0 User Story: As a user, I want to unlock achievements for milestones so that I feel a sense of accomplishment. Achievement Categories: Onboarding:

• “First Steps” - Complete profile (+50 XP)
• “Tree Planter” - Create first area (+50 XP)
• “Curious Mind” - Post first question (+50 XP)

Contribution:

• “Helpful Helper” - 10 answers submitted (+100 XP)
• “Insight Master” - 5 insights published (+200 XP)
• “Resource Curator” - 20 resources shared (+150 XP)

Social:

• “Popular” - Get 100 followers (+200 XP)
• “Influencer” - Get 1000 followers (+1000 XP)
• “Liked” - Receive 100 likes (+150 XP)

Quality:

• “Upvoted” - Receive 50 upvotes (+200 XP)
• “Accepted Answer” - 5 answers accepted (+300 XP)
• “Featured Insight” - Insight featured on homepage (+500 XP)

Consistency:

• “Week Warrior” - 7-day streak (+100 XP)
• “Month Champion” - 30-day streak (+500 XP)
• “Year Master” - 365-day streak (+5000 XP)

Acceptance Criteria:

• Badge display on profile (showcase 5 favorite badges)
• Achievement unlock notification (real-time)
• Achievement progress tracking
• Rare/epic/legendary badge tiers
• Achievement leaderboard

Domain Events:

• gamification.achievement.unlocked
• gamification.achievement.progress.updated

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FR-4.4: Leaderboards

Priority: P1 User Story: As a user, I want to see how I rank against others so that I can stay motivated and compete. Leaderboard Types:

• Global XP leaderboard (all-time)
• Weekly XP leaderboard (resets Monday)
• Monthly XP leaderboard
• Area-specific leaderboards
• Contribution leaderboards (questions, insights, resources)

Acceptance Criteria:

• Real-time leaderboard updates (WebSocket)
• Top 100 rankings displayed
• User’s current rank always visible
• Leaderboard filters (time range, area, contribution type)
• Opt-out option for privacy
• Leaderboard URL: /leaderboard/:type

Domain Events:

• gamification.leaderboard.updated
• gamification.leaderboard.rank.changed

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FR-4.5: Streak Tracking

Priority: P1 User Story: As a user, I want to maintain daily activity streaks so that I stay engaged and build habits. Acceptance Criteria:

• Daily activity counts if user performs any XP-earning action
• Streak counter on profile and dashboard
• Streak freeze (1 free day per 7-day streak)
• Streak milestones: 7, 30, 100, 365 days
• Streak recovery window (24 hours grace period)
• Push notification reminder if streak at risk

XP Bonuses:

• 7-day streak: +100 XP
• 30-day streak: +500 XP
• 100-day streak: +2000 XP
• 365-day streak: +10000 XP

Domain Events:

• gamification.streak.extended
• gamification.streak.broken
• gamification.streak.milestone

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5. Monetization (Polar Integration)

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FR-5.1: Subscription Tiers

Priority: P0 User Story: As a user, I want to choose a subscription tier that fits my needs so that I can access premium features. Tier Definitions: Acceptance Criteria:

• Tier displayed on user profile
• Feature gates enforce tier limits
• Quota usage displayed in dashboard
• Upgrade/downgrade flows with proration
• 14-day free trial for Pro tier
• Annual billing discount (20% off)

Domain Events:

• payment.subscription.created
• payment.subscription.upgraded
• payment.subscription.downgraded

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FR-5.2: Polar Checkout Integration

Priority: P0 User Story: As a user, I want to securely purchase a subscription so that I can access premium features. Acceptance Criteria:

• Polar checkout session created server-side
• Redirect to Polar-hosted checkout page
• Support payment methods: Card, PayPal, Apple Pay, Google Pay
• Handle successful payment callback
• Handle failed payment callback
• Send receipt email via Polar
• Activate subscription immediately on payment success

Flow:

1. User clicks “Upgrade to Pro”
2. Backend creates Polar checkout session
3. User redirected to Polar checkout
4. User completes payment
5. Polar sends webhook to backend
6. Backend activates subscription
7. User redirected to success page

Domain Events:

• payment.checkout.initiated
• payment.checkout.completed
• payment.checkout.failed

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FR-5.3: Usage Metering and Quotas

Priority: P0 User Story: As a free tier user, I want to know when I’m approaching my limits so that I can decide whether to upgrade. Acceptance Criteria:

• Real-time quota tracking (questions, insights, storage)
• Usage warnings at 80% and 100% of quota
• Graceful degradation (soft limit → upgrade prompt)
• Usage reset on billing cycle
• Usage analytics dashboard
• Overage handling (block or allow with fee)

Warning UX:

• 80% usage: Banner notification “You’ve used 8/10 areas”
• 100% usage: Modal blocking action with upgrade CTA

Domain Events:

• payment.quota.warning
• payment.quota.exceeded
• payment.quota.reset

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FR-5.4: Webhook Handling (Polar Events)

Priority: P0 User Story: As the system, I want to handle Polar webhooks reliably so that subscription state stays synchronized. Webhook Events Handled:

• checkout.completed → Activate subscription
• subscription.updated → Update tier and quotas
• subscription.canceled → Downgrade to free tier
• invoice.paid → Record payment
• invoice.payment_failed → Send dunning email
• subscription.trial_ending → Send reminder

Acceptance Criteria:

• Webhook signature verification (Polar secret)
• Idempotent webhook processing (event ID tracking)
• Retry failed webhooks with exponential backoff
• Webhook event log for debugging
• Alert on webhook processing failures

Domain Events:

• payment.webhook.received
• payment.webhook.processed
• payment.webhook.failed

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6. Real-Time Collaboration

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FR-6.1: Live Presence Tracking

Priority: P1 User Story: As a user, I want to see who else is viewing the same content so that I can collaborate in real-time. Acceptance Criteria:

• Show avatars of users currently viewing content
• Max 10 avatars displayed, “+N more” for overflow
• Presence timeout after 30 seconds of inactivity
• Privacy setting to hide presence
• Presence URL: WebSocket /ws/presence/:contentId

Domain Events:

• realtime.user.joined
• realtime.user.left

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FR-6.2: Real-Time Notifications

Priority: P1 User Story: As a user, I want to receive instant notifications so that I stay updated on important activity. Notification Types:

• New comment on your content
• Your answer was accepted
• You earned an achievement
• Someone followed you
• You leveled up
• Your content was featured
• Subscription expiring soon

Acceptance Criteria:

• Real-time delivery via WebSocket
• Notification bell icon with unread count
• Notification center with history (last 30 days)
• Mark as read functionality
• Notification preferences (email, push, in-app)
• Notification grouping (e.g., “5 new likes”)

Domain Events:

• notification.sent
• notification.read

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FR-6.3: Collaborative Editing (Future)

Priority: P3 User Story: As a co-author, I want to edit insights collaboratively in real-time so that we can work together efficiently. Acceptance Criteria:

• Operational Transform (OT) or CRDT for conflict resolution
• Show cursor positions of other editors
• Character-level locking
• Edit history with conflict markers
• Permission model for co-authors

Note: This is a P3 feature for future implementation.

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7. Search and Discovery

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FR-7.1: Global Search

Priority: P1 User Story: As a user, I want to search across all content so that I can quickly find relevant information. Acceptance Criteria:

• Full-text search across areas, questions, insights, discussions, resources
• Search filters: content type, date range, user, tags, area
• Search results ranked by relevance + popularity
• Search suggestions (autocomplete)
• Search history (last 10 searches)
• Search URL: /search?q=:query

Search Algorithm:

• Title match: High weight
• Body match: Medium weight
• Tag match: Medium-high weight
• Recency boost: Recent content +10%
• Popularity boost: High vote score +20%

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FR-7.2: Content Recommendations

Priority: P2 User Story: As a user, I want to discover content based on my interests so that I continue learning. Acceptance Criteria:

• Recommended areas based on activity
• Recommended questions to answer (based on expertise)
• Recommended insights to read (based on follows and likes)
• “Similar content” section on detail pages
• Personalized homepage feed

Recommendation Algorithm:

• Collaborative filtering (users with similar activity)
• Content-based filtering (tags, areas)
• Trending content (velocity of engagement)

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8. Content Moderation

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FR-8.1: Report Content

Priority: P1 User Story: As a user, I want to report inappropriate content so that the community stays safe and respectful. Acceptance Criteria:

• Report reasons: Spam, Harassment, Off-topic, Misinformation, Other
• Report detail text field (optional)
• Anonymous reporting
• Reporter notified of action taken
• Report queue for moderators

Domain Events:

• moderation.content.reported
• moderation.report.reviewed

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FR-8.2: Moderator Actions

Priority: P1 User Story: As a moderator, I want tools to manage content quality so that the platform maintains high standards. Moderator Actions:

• Hide content (reversible)
• Delete content (permanent)
• Warn user
• Suspend user (temporary)
• Ban user (permanent)
• Feature content (homepage, area page)
• Merge duplicate questions

Acceptance Criteria:

• Moderator dashboard with report queue
• Bulk actions on multiple items
• Moderation log (audit trail)
• Appeal process for users
• Moderator notes on content

Domain Events:

• moderation.content.hidden
• moderation.content.deleted
• moderation.user.warned
• moderation.user.suspended

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9. CV/Resume Builder

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FR-9.1: Generate CV from Profile

Priority: P2 User Story: As a user, I want to generate a professional CV from my TekTree profile so that I can showcase my skills. Acceptance Criteria:

• CV includes: education, experience, awards, skills, endorsements
• Multiple CV templates (Classic, Modern, Creative)
• Export formats: PDF, DOCX, Markdown
• Privacy controls (hide specific sections)
• Share CV via public URL: /cv/:userId
• Track CV views

Domain Events:

• cv.generated
• cv.exported
• cv.viewed

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10. Analytics and Insights

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FR-10.1: User Analytics Dashboard

Priority: P2 User Story: As a Pro user, I want to see analytics on my content so that I understand what resonates with the community. Metrics Displayed:

• Content views (per item, aggregate)
• Engagement rate (likes, comments, votes per view)
• Follower growth over time
• XP earning trends
• Top-performing content
• Audience demographics (areas of interest)

Acceptance Criteria:

• Date range selector (7d, 30d, 90d, all time)
• Exportable reports (CSV)
• Comparison to previous period
• Analytics URL: /analytics

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Summary: MVP Feature Scope

P0 (Critical) Features for MVP:

• User registration, authentication, profile management
• Create areas, post questions, share insights, start discussions
• Like, comment, vote on content
• XP system, levels, achievements
• Leaderboards (global, weekly)
• Subscription tiers with Polar integration
• Usage metering and quotas
• Real-time notifications
• Global search

P1 (High Priority) Post-Launch:

• Streak tracking
• Follow users/areas
• Content recommendations
• Moderation tools
• Live presence tracking

P2-P3 (Lower Priority):

• CV builder
• Advanced analytics
• Collaborative editing
• Custom badges

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Document Status: ✅ Complete Related Documents: ARCHITECTURE_OVERVIEW.md, GAMIFICATION_SYSTEM.md, MONETIZATION_STRATEGY.md