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Build real projects from scratch with guided, step-by-step instructions and interactive checkpoints.
Create a command-line task manager with Node.js — file I/O, argument parsing, and colored output.
Complete CRUD API with validation, error handling, and rate limiting.
Data dashboard with charts, filters, and responsive layout.
AI-powered chatbot that answers questions about your documents.
Professional portfolio with animations, dark mode, and perfect Lighthouse scores.
Web app animating sorting algorithms with speed control and array size input.
Browser-based notes with Markdown rendering, localStorage, search, and tags.
React app tracking income and expenses with categories, charts, and IndexedDB.
Kanban board with Next.js, drag-and-drop, API routes, and PostgreSQL.
WebSocket chat with message history, presence indicators, and typing notifications.
Lint, typecheck, test, build, deploy to Vercel — with branch protection.
5 React components with keyboard nav, ARIA, focus trapping, and screen reader support.
PostgreSQL queries with joins, aggregations, and interactive chart visualization.
AI agent that searches, reads files, and executes code with planning and error recovery.
Model Context Protocol server exposing PostgreSQL to AI assistants.
Email/password auth with JWT, bcrypt, protected routes, and session management.
Containerize Next.js + PostgreSQL with Docker Compose and deploy to the cloud.
Unit tests, integration tests, E2E, mocking, and CI integration.
System design + implementation: hashing, redirects, analytics, and rate limiting.
Lexer, parser, AST, and interpreter for an expression language in TypeScript.
Responsive landing page using only HTML and CSS — no frameworks.
React form with step navigation, Zod validation, and conditional logic.
Product pages, cart, Stripe checkout, and order confirmation in Next.js.
Schema-first GraphQL with resolvers, queries, mutations, and error handling.
Canvas-based Snake game with score, levels, and persistent high scores.
Prepare data, fine-tune with LoRA, evaluate, compare to base model.
In-memory store with TTL, disk persistence, wire protocol, and benchmarks.
TCP sockets, HTTP/1.1 parsing, static files, routing — no Express.
Kanban-style CRUD app with drag-and-drop and IndexedDB persistence.
TypeScript utility library with tests, docs, and npm publishing.
Collect metrics, time-series charts, threshold alerts, auto-refresh.
Vectorize documents, cosine similarity search, ranked results UI.
Token bucket + sliding window algorithms with Express middleware.
Tokens, themed components, variant system, and documentation page.
Real-time shared canvas game with lobbies and server authority.
Parse diffs, LLM analysis, inline review comments with severity.
Cron parsing, job execution, retry logic, dead letter queue.
Roles, permissions, resource guards, middleware, and audit log.
Markdown to HTML with frontmatter, templates, and dev server.
Up/down migrations, version tracking, rollback, and CLI interface.
AES-256-GCM encryption, access control, audit log, key rotation.
Backlog, Kanban board, velocity chart, burndown, team assignment.
Round-robin, least-connections, health checks, connection draining.
Service worker, cache strategies, Web Push API, install prompt.
Extract from API, transform with Python, load to PostgreSQL.
Structured input, multiple templates, PDF export, ATS-friendly.
Event ingestion, windowed aggregation, backpressure, output sinks.
Flag definitions, percentage rollouts, user targeting, client SDK.
Event API, timeline visualization, severity, postmortem export.
Terminal UI with real-time stats, keyboard nav, multiple panels.
MDX content, dynamic routes, tag filtering, RSS feed.
Fetch, parse HTML, handle pagination, rate limiting, export data.
Routing, rate limiting, auth, transforms, logging, circuit breaker.
Resize, WebP/AVIF conversion, caching, CDN-ready headers.
Producer/consumer, retry with backoff, dead letter queue, dashboard.
Split-pane editor, real-time preview, toolbar, keyboard shortcuts.
Authorization code flow, PKCE, tokens, scopes, refresh tokens.
Parse package.json, dependency tree, force-directed graph with D3.
Template engine, send queue, delivery tracking, retry logic.
HTTP ingestion, structured parsing, full-text search, dashboard.
Bell badge, dropdown panel, read/unread, real-time via SSE.
Drag-and-drop, progress bars, type validation, image preview.
Inverted index, tokenization, TF-IDF ranking, fuzzy matching.
Typed states, transitions, guards, actions, visualization.
Content CRUD API, Markdown, media uploads, webhook notifications.
LCS diff algorithm, side-by-side and inline views, highlighting.
Cookie-free event collection, session tracking, funnel visualization.
Plugin registry, lifecycle hooks, dependency resolution, sandboxing.
Live pattern matching, capture groups, flags, match highlighting.
HSL manipulation, contrast checker, export as CSS/Tailwind.
Intent detection, entity extraction, conversation flow, context.
YAML test definitions, HTTP runner, assertion engine, CI reports.
AST parsing, formatting rules, indentation, line width control.
Shorten URLs via API, local history, cross-platform clipboard.
Parse JSON Schema, validate documents, collect errors with paths.
Boards, columns, cards, drag ordering, user assignment, PostgreSQL.
HTTP API, headless rendering, screenshot capture, caching.
Pre-commit linting, commit validation, pre-push tests, cross-platform.
HTML templates, variable substitution, batch generation, download API.
JSON endpoint definitions, fake data, simulated latency, hot-reload.
Parse annotations, type environment, check assignments, report errors.
Event store, projections, snapshots, replay, CQRS read models.
Experiment definitions, random assignment, statistical significance.
MDX content, sidebar nav, search, versioning, dark mode.
Receive, queue, deliver webhooks with retry and signature verification.
Trie-based prefix matching, ranked suggestions, keyboard navigation.
Model definitions, query builder, migrations, relationships.
Multi-URL monitoring, response times, failure alerts, scheduling.
Names, emails, addresses, custom schemas, seeded reproducibility.
Auth, team management, Stripe billing, dashboard, deployment.
AES-256 vault, password generation, clipboard copy, search.
React Native with Expo, drag-and-drop, AsyncStorage persistence.
Parse git log, render commit graph, interactive zoom/pan.
Inject latency, kill processes, corrupt responses, schedule experiments.
Grid system, utility classes, component styles, dark mode, npm package.
Monaco editor, live preview, console output, multiple files, share.
Products, stock tracking, low-stock alerts, barcode lookup, reports.
Start/stop timer, project categories, reports, chart visualization.
Generate YAML manifests, deploy to cluster, health checks, rollback.
Auth, content management, progress tracking, certificates, payments.