# Vibe Engines

> Free, interactive learning for AI and backend engineers — by Saurabh Singh,
> a senior AI engineer building in the open. Full-length technical handbooks,
> step-by-step system-design walkthroughs, and browser-based developer tools,
> all free, all without sign-up.

## What this site is

Vibe Engines is an open educational resource for software engineers, AI/LLM
builders, and people preparing for senior and staff engineering interviews. Its
three pillars are:

- **Learning Paths** (18) — goal-oriented, ordered courses that thread content
  across formats (become an AI engineer, pass the system-design interview, crack the
  coding interview, …). The best starting point for a specific goal: /learn.
- **Topics** (14) — cross-format hubs (RAG, LLM engineering, agents, AI evaluation,
  distributed systems, caching, algorithms, interview prep, …). Each hub aggregates
  every handbook, system design, challenge, lab and tool on that subject — the best
  entry point for following one subject across formats: /topics.
- **Handbooks** (160) — full-length, interactive guides on agentic AI, LLM evals,
  RAG, system-design fundamentals, and language interview prep (Angular, Python).
- **System Design Walkthroughs** (62) — each builds a real large-scale system
  (Uber, WhatsApp, a key-value store, a payment system, …) one concept at a time
  through an interactive diagram, foregrounding the trade-offs interviewers probe.
- **AI System Design Walkthroughs** (61) — the same interactive treatment for AI/LLM
  architectures (conversational AI, RAG, agents, inference serving, vector databases,
  semantic search), foregrounding the trade-offs behind shipping LLM systems: /ai-system-design.
- **Free Developer Tools** (54) — browser-based, no-signup visualizers and
  calculators (consistent-hashing ring, capacity estimator, quorum explorer, RAG
  chunking playground, LLM cost planner, and more).
- **Algorithms, Played** (98) — classic algorithms taught as playable games:
  you drive the problem and lose on instinct, then meet the algorithm that solves
  it, with full theory, a worked trace and a quiz.
- **Labs** (51) — AI and engineering concepts (gradient descent, …) taught as
  playable games: you drive the idea, fail on instinct, then meet the method that
  works, with full theory, a worked trace and a quiz.
- **Coding Challenges** (68) — interview-style problems you solve in the
  browser in Python or TypeScript, spanning DSA and AI engineering (softmax, cosine
  similarity, top-k retrieval, token-F1), with hidden tests and instant feedback.

Everything runs client-side and is free. Author: Saurabh Singh (Senior AI Engineer).
Contact: singh71297@hotmail.com. Primary topics: agentic AI, LLM systems, RAG,
AI evaluations, distributed systems, and system design.

## Key facts

- 160 technical handbooks, 62 system-design walkthroughs, 61 AI system-design
  walkthroughs, 25 roadmap(s), 54 free tools, 98 algorithm game(s), 51 interactive lab(s),
  68 coding challenge(s), 108 paper breakdown(s), 8 video course(s).
- All content is free, self-contained, and requires no account.
- Canonical handbook/roadmap/system-design pages live at /handbook/<slug>,
  /roadmap/<slug>, and /systemdesign/<slug>; AI system designs at /ai-system-design/<slug>;
  tools at /tools/<slug>; algorithm games at /algorithm/<slug>.
- License: free to read and cite; AI training/index use permitted with attribution
  (linking back to the canonical URL). See /terms for full terms.

## Actions — do a task in the browser (no signup)

Each free tool performs one concrete task. Map a user intent to the tool that
does it, then send the user (or act) at the URL:
- Watch keys rebalance on the hash ring as nodes come and go → https://vibeengines.com/tools/consistent-hashing
- Back-of-the-envelope math for system design, with the reasoning shown → https://vibeengines.com/tools/capacity-estimator
- Paste a document, pick a strategy, see the actual chunks and tokens → https://vibeengines.com/tools/rag-chunking
- Model an agent’s context window and see where the tokens (and dollars) go → https://vibeengines.com/tools/context-cost-planner
- Set N, R and W and instantly see your consistency–availability trade-off → https://vibeengines.com/tools/quorum-explorer
- Compose services in series and parallel to find your real uptime → https://vibeengines.com/tools/availability-calculator
- Design an eval rubric and generate the judge prompt for it → https://vibeengines.com/tools/llm-judge-builder
- Build a function-calling tool definition visually, get valid JSON out → https://vibeengines.com/tools/tool-schema-designer
- Paste your numbers and see p50, p90, p95 and p99 — the tail, not the average → https://vibeengines.com/tools/percentile-calculator
- Enter your token usage and see the monthly bill across every major model → https://vibeengines.com/tools/model-pricing-comparator
- Pick your item count and false-positive rate — get bits, memory and hash count → https://vibeengines.com/tools/bloom-filter-sizing
- Fire requests at a rate limiter and watch tokens drain, refill and throttle → https://vibeengines.com/tools/token-bucket-simulator
- See your prompt fill the context window — and where it overflows → https://vibeengines.com/tools/context-window-visualizer
- Paste text, get tokens — plus what it costs and how much window it eats → https://vibeengines.com/tools/token-counter
- Will that model fit on your GPU? Weights + KV cache + overhead, computed → https://vibeengines.com/tools/gpu-vram-calculator
- What will that fine-tune actually cost? GPUs, hours, dollars — before you rent anything → https://vibeengines.com/tools/fine-tuning-cost-estimator
- The memory that actually caps your concurrency — per token, per sequence, per batch → https://vibeengines.com/tools/kv-cache-calculator
- Price your RAG index before you build it: embedding spend, vector storage, query costs → https://vibeengines.com/tools/embedding-cost-calculator
- Where does the second go? Build the request waterfall and find the TTFT bottleneck → https://vibeengines.com/tools/latency-budget-builder
- How fast are you spending the error budget — and when does the pager fire? → https://vibeengines.com/tools/slo-burn-calculator
- Every model that matters, one sortable table — priced at YOUR input:output ratio → https://vibeengines.com/tools/model-comparison
- How much compute, time and money to train a model of N params on D tokens → https://vibeengines.com/tools/training-compute-calculator
- Concurrency = throughput × latency. Give any two, get the third → https://vibeengines.com/tools/littles-law-calculator
- Model prompt-cache hit rate, the write premium, and your real $/request → https://vibeengines.com/tools/prompt-caching-calculator
- Paste a JSON Web Token, read its header, claims and expiry — offline → https://vibeengines.com/tools/jwt-decoder
- Type an IPv4 CIDR block, get the network, broadcast, range and host count → https://vibeengines.com/tools/cidr-calculator
- Epoch ↔ human date, in seconds or milliseconds, UTC and local → https://vibeengines.com/tools/unix-time-converter
- Generate v4 UUIDs and ULIDs in bulk — cryptographically random, in-browser → https://vibeengines.com/tools/uuid-ulid-generator
- Write a pattern, paste text, see every match and capture group live → https://vibeengines.com/tools/regex-tester
- Encode or decode Base64, Base64URL and percent-encoding — UTF-8 safe → https://vibeengines.com/tools/base64-url-tools
- Click permissions to get the octal, or type octal to see the rwx → https://vibeengines.com/tools/chmod-calculator
- See a password’s entropy in bits and how long it would take to crack → https://vibeengines.com/tools/password-entropy
- Write a cron expression, read it in plain English, see the next run times → https://vibeengines.com/tools/cron-builder
- Paste a one-line query, get readable, indented SQL → https://vibeengines.com/tools/sql-formatter
- Paste CSV or TSV, get a clean, aligned Markdown table → https://vibeengines.com/tools/md-table-generator
- Compare two blocks of text and see exactly what changed, line by line → https://vibeengines.com/tools/diff-checker
- Enter two variants’ conversions and see if the difference is real → https://vibeengines.com/tools/ab-significance-calculator
- Size a topic’s partitions from your throughput and consumer targets → https://vibeengines.com/tools/kafka-partition-calculator
- Size a DB connection pool from QPS and latency — and check the DB’s limit → https://vibeengines.com/tools/connection-pool-sizer
- Estimate how much disk a B-tree index will take before you create it → https://vibeengines.com/tools/db-index-size-estimator
- Validate and pretty-print JSON — or diff two JSON documents by value → https://vibeengines.com/tools/json-format-diff
- See what a cache buys you: latency saved and backend load removed → https://vibeengines.com/tools/cache-roi-calculator
- Project how big your data gets — and when you’ll run out of disk → https://vibeengines.com/tools/storage-growth-forecaster
- Turn a target rate and burst into concrete token-bucket parameters → https://vibeengines.com/tools/rate-limit-designer
- See why an agent’s cost grows faster than its number of steps → https://vibeengines.com/tools/agent-loop-cost-estimator
- How many shards you need from data size, QPS and per-shard limits → https://vibeengines.com/tools/sharding-planner
- See what vector dimensions cost in memory before you pick them → https://vibeengines.com/tools/embedding-dim-tradeoff
- The latency numbers every engineer should know — scaled to human time → https://vibeengines.com/tools/latency-numbers-interactive
- Compare cloud GPU hourly rates and estimate a job’s compute cost → https://vibeengines.com/tools/gpu-rental-prices
- Given an NPU’s TOPS and RAM, see which local models fit and how fast they prefill → https://vibeengines.com/tools/npu-model-fit-calculator
- Project the METR doubling curve: when do agents reliably handle day- and week-long tasks? → https://vibeengines.com/tools/agent-time-horizon-explorer
- Paste a SKILL.md and score it against a Claude-Skills quality rubric — before an agent has to use it → https://vibeengines.com/tools/skill-linter
- What applies on 2 Aug 2026 vs later — mapped to the engineering artifacts you actually have to ship → https://vibeengines.com/tools/eu-ai-act-timeline
- Indicative 2026 AI-engineering comp bands by role, level and company tier → https://vibeengines.com/tools/ai-salary-explorer

Other interactive actions: solve a coding problem → /challenge · run an algorithm
or lab step-by-step → /algorithm, /lab · walk a system design → /systemdesign,
/ai-system-design · look up a term → /glossary.

## Learning Paths (start here)
- [Become an AI Engineer](https://vibeengines.com/learn/ai-engineer)
- [Ace the AI Engineer Interview](https://vibeengines.com/learn/ai-interview)
- [Ship an AI Product](https://vibeengines.com/learn/ai-startup)
- [Master LLM Evaluation](https://vibeengines.com/learn/llm-evals)
- [ML Engineering Foundations](https://vibeengines.com/learn/ml-foundations)
- [Pass the System Design Interview](https://vibeengines.com/learn/system-design-interview)
- [Level Up as a Backend Engineer](https://vibeengines.com/learn/backend-engineer)
- [Reliability & Scale (SRE)](https://vibeengines.com/learn/reliability-sre)
- [Crack the Coding Interview](https://vibeengines.com/learn/coding-interview)
- [Advanced Algorithms & Data Structures](https://vibeengines.com/learn/advanced-dsa)
- [Master Context Engineering](https://vibeengines.com/learn/context-engineer)
- [Become a Forward Deployed Engineer](https://vibeengines.com/learn/forward-deployed-engineer)
- [Build an LLM From Scratch](https://vibeengines.com/learn/llm-from-scratch)
- [System Design in 30 Days](https://vibeengines.com/learn/system-design-in-30-days)
- [The 4-Week Interview Sprint](https://vibeengines.com/learn/4-week-interview-sprint)
- [Distributed Systems Deep Dive](https://vibeengines.com/learn/distributed-systems-deep-dive)
- [The Papers Bootcamp](https://vibeengines.com/learn/papers-bootcamp)
- [AI for Product Managers](https://vibeengines.com/learn/ai-for-pms)

## Browse by Topic (cross-format hubs)
- [RAG & Retrieval](https://vibeengines.com/topic/rag-retrieval)
- [LLM Engineering](https://vibeengines.com/topic/llm-engineering)
- [AI Agents & Tools](https://vibeengines.com/topic/ai-agents)
- [AI Evaluation](https://vibeengines.com/topic/ai-evaluation)
- [ML Foundations](https://vibeengines.com/topic/ml-foundations)
- [Distributed Systems](https://vibeengines.com/topic/distributed-systems)
- [Databases & Storage](https://vibeengines.com/topic/databases-storage)
- [Caching & Performance](https://vibeengines.com/topic/caching-performance)
- [Real-time & Messaging](https://vibeengines.com/topic/realtime-messaging)
- [Algorithms & DSA](https://vibeengines.com/topic/algorithms-dsa)
- [AI for Professionals](https://vibeengines.com/topic/ai-for-professionals)
- [Interview Prep](https://vibeengines.com/topic/interview-prep)
- [Forward Deployed Engineering](https://vibeengines.com/topic/forward-deployed-engineering)
- [Developer Utilities](https://vibeengines.com/topic/developer-utilities)

## Handbooks
- [The Prompting Handbook](https://vibeengines.com/handbook/prompting-handbook)
- [The Agentic AI Interview Handbook](https://vibeengines.com/handbook/llm-interview)
- [The Senior AI Engineer Interview Handbook](https://vibeengines.com/handbook/senior-ai-engineer)
- [50 Angular Interview Questions](https://vibeengines.com/handbook/angular-interview)
- [50 Python Interview Questions](https://vibeengines.com/handbook/python-interview)
- [51 LLM Evals Interview Questions](https://vibeengines.com/handbook/llm-evals-interview)
- [The Agent Evaluations Handbook](https://vibeengines.com/handbook/agent-evals)
- [The System Design Fundamentals Handbook](https://vibeengines.com/handbook/system-design-fundamentals)
- [CAP Theorem & Consistency Models](https://vibeengines.com/handbook/cap-theorem)
- [Concurrency, Locks & Isolation Levels](https://vibeengines.com/handbook/concurrency-and-locking)
- [Partitioning, Sharding & Replication](https://vibeengines.com/handbook/partitioning-and-replication)
- [Consensus, Transactions & Coordination](https://vibeengines.com/handbook/consensus-and-coordination)
- [The Agent Patterns Handbook](https://vibeengines.com/handbook/agent-patterns)
- [The LLM Serving Handbook](https://vibeengines.com/handbook/llm-serving)
- [The Transformers Handbook](https://vibeengines.com/handbook/transformers)
- [The RAG Handbook](https://vibeengines.com/handbook/rag)
- [The Fine-Tuning Handbook](https://vibeengines.com/handbook/fine-tuning)
- [The Vector Databases Handbook](https://vibeengines.com/handbook/vector-databases)
- [The Kafka Handbook](https://vibeengines.com/handbook/kafka)
- [The Redis Handbook](https://vibeengines.com/handbook/redis)
- [The SQL Handbook](https://vibeengines.com/handbook/sql)
- [The Kubernetes Handbook](https://vibeengines.com/handbook/kubernetes)
- [The Observability Handbook](https://vibeengines.com/handbook/observability)
- [The React Interview Handbook](https://vibeengines.com/handbook/react-interview)
- [The Networking Handbook](https://vibeengines.com/handbook/networking)
- [The Diffusion Models Handbook](https://vibeengines.com/handbook/diffusion-models)
- [The Reinforcement Learning Handbook](https://vibeengines.com/handbook/reinforcement-learning)
- [The Behavioral Interview Handbook](https://vibeengines.com/handbook/behavioral-interview)
- [The Model Context Protocol (MCP) Handbook](https://vibeengines.com/handbook/mcp)
- [The Loop Engineering Handbook](https://vibeengines.com/handbook/loop-engineering)
- [The Context Engineering Handbook](https://vibeengines.com/handbook/context-engineering)
- [The Agent Skills Handbook](https://vibeengines.com/handbook/agent-skills)
- [The Agentic Coding Handbook](https://vibeengines.com/handbook/agentic-coding)
- [The On-Device AI Handbook](https://vibeengines.com/handbook/on-device-ai)
- [The AI Security Handbook](https://vibeengines.com/handbook/ai-security)
- [The Git Internals Handbook](https://vibeengines.com/handbook/git-internals)
- [The Docker Handbook](https://vibeengines.com/handbook/docker)
- [The PostgreSQL Internals Handbook](https://vibeengines.com/handbook/postgres-internals)
- [The GPU Fundamentals Handbook](https://vibeengines.com/handbook/gpu-fundamentals)
- [The API Design Handbook](https://vibeengines.com/handbook/api-design)
- [The Distributed Training Handbook](https://vibeengines.com/handbook/distributed-training)
- [RAG vs Fine-Tuning](https://vibeengines.com/handbook/rag-vs-fine-tuning)
- [Kafka vs RabbitMQ](https://vibeengines.com/handbook/kafka-vs-rabbitmq)
- [Redis vs Memcached](https://vibeengines.com/handbook/redis-vs-memcached)
- [SQL vs NoSQL](https://vibeengines.com/handbook/sql-vs-nosql)
- [PostgreSQL vs MySQL](https://vibeengines.com/handbook/postgres-vs-mysql)
- [gRPC vs REST](https://vibeengines.com/handbook/grpc-vs-rest)
- [MCP vs Function Calling](https://vibeengines.com/handbook/mcp-vs-function-calling)
- [50 System Design Interview Questions](https://vibeengines.com/handbook/system-design-interview)
- [AI for Lawyers](https://vibeengines.com/handbook/ai-for-lawyers)
- [AI for Doctors](https://vibeengines.com/handbook/ai-for-doctors)
- [AI for Civil Engineers](https://vibeengines.com/handbook/ai-for-civil-engineers)
- [The Embeddings Handbook](https://vibeengines.com/handbook/embeddings)
- [The AI Cost Engineering Handbook](https://vibeengines.com/handbook/ai-cost-engineering)
- [The Structured Outputs Handbook](https://vibeengines.com/handbook/structured-outputs)
- [The Model Routing Handbook](https://vibeengines.com/handbook/model-routing)
- [The Agent Memory Handbook](https://vibeengines.com/handbook/agent-memory)
- [The Guardrails Engineering Handbook](https://vibeengines.com/handbook/guardrails-engineering)
- [The Synthetic Data Handbook](https://vibeengines.com/handbook/synthetic-data)
- [The Harness Engineering Handbook](https://vibeengines.com/handbook/harness-engineering)
- [The LLM Observability Handbook](https://vibeengines.com/handbook/llm-observability)
- [The Prompt Caching Handbook](https://vibeengines.com/handbook/prompt-caching)
- [The Evals in CI Handbook](https://vibeengines.com/handbook/evals-in-ci)
- [The Sandboxing Handbook](https://vibeengines.com/handbook/sandboxing)
- [The Local LLM Stack Handbook](https://vibeengines.com/handbook/local-llm-stack)
- [The PII in LLM Pipelines Handbook](https://vibeengines.com/handbook/pii-in-llm-pipelines)
- [The Multi-Agent Orchestration Handbook](https://vibeengines.com/handbook/multi-agent-orchestration)
- [The Data Engineering for AI Handbook](https://vibeengines.com/handbook/data-engineering-for-ai)
- [The Browser & Computer-Use Agents Handbook](https://vibeengines.com/handbook/browser-computer-use-agents)
- [The A2A Agent Interop Handbook](https://vibeengines.com/handbook/a2a-agent-interop)
- [The WebSockets & Real-Time Handbook](https://vibeengines.com/handbook/websockets-realtime)
- [The Voice AI Real-Time Agents Handbook](https://vibeengines.com/handbook/voice-ai-realtime-agents)
- [The Caching Patterns Handbook](https://vibeengines.com/handbook/caching-patterns)
- [Cryptography for Engineers](https://vibeengines.com/handbook/cryptography-for-engineers)
- [The OAuth & Auth Deep Dive](https://vibeengines.com/handbook/oauth-auth-deep)
- [The Operating Systems Fundamentals Handbook](https://vibeengines.com/handbook/os-fundamentals)
- [The Linux Internals Handbook](https://vibeengines.com/handbook/linux-internals)
- [The Compilers Basics Handbook](https://vibeengines.com/handbook/compilers-basics)
- [The Browser Internals Handbook](https://vibeengines.com/handbook/browser-internals)
- [The Rust Handbook](https://vibeengines.com/handbook/rust)
- [The Go Handbook](https://vibeengines.com/handbook/go)
- [The TypeScript Handbook](https://vibeengines.com/handbook/typescript)
- [The React Handbook](https://vibeengines.com/handbook/react)
- [The Salary Negotiation Handbook](https://vibeengines.com/handbook/salary-negotiation)
- [The Code Review Culture Handbook](https://vibeengines.com/handbook/code-review-culture)
- [The EU AI Act Handbook](https://vibeengines.com/handbook/eu-ai-act)
- [The AI Product Engineering Handbook](https://vibeengines.com/handbook/ai-product-engineering)
- [The Resume & Portfolio Handbook](https://vibeengines.com/handbook/resume-portfolio)
- [The Staff Engineer Behaviors Handbook](https://vibeengines.com/handbook/staff-engineer-behaviors)
- [AI for Accountants](https://vibeengines.com/handbook/ai-for-accountants)
- [AI for Teachers](https://vibeengines.com/handbook/ai-for-teachers)
- [AI for Architects](https://vibeengines.com/handbook/ai-for-architects)
- [AI for Real Estate](https://vibeengines.com/handbook/ai-for-real-estate)
- [AI for Marketers](https://vibeengines.com/handbook/ai-for-marketers)
- [AI for HR](https://vibeengines.com/handbook/ai-for-hr)
- [AI for Financial Analysts](https://vibeengines.com/handbook/ai-for-financial-analysts)
- [AI for Journalists](https://vibeengines.com/handbook/ai-for-journalists)
- [AI for Product Managers](https://vibeengines.com/handbook/ai-for-product-managers)
- [AI for Sales](https://vibeengines.com/handbook/ai-for-sales)
- [RAG vs Long Context](https://vibeengines.com/handbook/rag-vs-long-context)
- [LoRA vs Full Fine-Tuning](https://vibeengines.com/handbook/lora-vs-full-fine-tuning)
- [MCP vs A2A](https://vibeengines.com/handbook/mcp-vs-a2a)
- [Agents vs Workflows](https://vibeengines.com/handbook/agents-vs-workflows)
- [Embeddings vs Keyword Search](https://vibeengines.com/handbook/embeddings-vs-keyword-search)
- [Kafka vs Kinesis](https://vibeengines.com/handbook/kafka-vs-kinesis)
- [REST vs Webhooks vs SSE](https://vibeengines.com/handbook/rest-vs-webhooks-vs-sse)
- [Monolith vs Microservices](https://vibeengines.com/handbook/monolith-vs-microservices)
- [LLM vs SLM](https://vibeengines.com/handbook/llm-vs-slm)
- [GPU vs TPU](https://vibeengines.com/handbook/gpu-vs-tpu)
- [Streaming vs Batch](https://vibeengines.com/handbook/streaming-vs-batch)
- [OLTP vs OLAP](https://vibeengines.com/handbook/oltp-vs-olap)
- [Raft vs Paxos](https://vibeengines.com/handbook/raft-vs-paxos)
- [CP vs AP Databases](https://vibeengines.com/handbook/cp-vs-ap-databases)
- [LLM API Pricing](https://vibeengines.com/handbook/llm-api-pricing)
- [Tokenizer Efficiency Benchmark](https://vibeengines.com/handbook/tokenizer-efficiency-benchmark)
- [The Forward Deployed Engineer: Role & Mindset](https://vibeengines.com/handbook/fde-role-and-mindset)
- [Customer Discovery & Scoping for FDEs](https://vibeengines.com/handbook/customer-discovery-and-scoping)
- [Customer Integration Patterns for FDEs](https://vibeengines.com/handbook/customer-integration-patterns)
- [Rapid Prototyping for FDEs](https://vibeengines.com/handbook/rapid-prototyping-for-fdes)
- [Deploying in Customer Environments](https://vibeengines.com/handbook/deploying-in-customer-environments)
- [The Demo & Storytelling Playbook](https://vibeengines.com/handbook/demo-and-storytelling)
- [Security & Compliance for FDEs](https://vibeengines.com/handbook/security-and-compliance-for-fdes)
- [Solutions Engineering & Stakeholder Management](https://vibeengines.com/handbook/solutions-engineering-and-stakeholder-management)
- [From POC to Production: Hardening](https://vibeengines.com/handbook/poc-to-production-hardening)
- [Handoff & Enablement for FDEs](https://vibeengines.com/handbook/handoff-and-enablement)
- [Learning a Customer’s Domain Fast](https://vibeengines.com/handbook/learning-a-domain-fast)
- [AI App Patterns for FDEs](https://vibeengines.com/handbook/ai-app-patterns-for-fdes)
- [Test-Time Compute & Reasoning Models](https://vibeengines.com/handbook/test-time-compute)
- [RL from Verifiable Rewards (RLVR)](https://vibeengines.com/handbook/rlvr-verifiable-rewards)
- [World Models](https://vibeengines.com/handbook/world-models)
- [GraphQL vs REST](https://vibeengines.com/handbook/graphql-vs-rest)
- [MoE vs Dense Models](https://vibeengines.com/handbook/moe-vs-dense-models)
- [Encoder vs Decoder Models](https://vibeengines.com/handbook/encoder-vs-decoder-models)
- [Quantization vs Distillation](https://vibeengines.com/handbook/quantization-vs-distillation)
- [Cross-Encoder vs Bi-Encoder](https://vibeengines.com/handbook/cross-encoder-vs-bi-encoder)
- [SQL vs Vector Database](https://vibeengines.com/handbook/sql-vs-vector-database)
- [Batch vs Real-Time Inference](https://vibeengines.com/handbook/batch-vs-realtime-inference)
- [Orchestration vs Choreography](https://vibeengines.com/handbook/orchestration-vs-choreography)
- [Optimistic vs Pessimistic Locking](https://vibeengines.com/handbook/optimistic-vs-pessimistic-locking)
- [TCP vs UDP](https://vibeengines.com/handbook/tcp-vs-udp)
- [Process vs Thread](https://vibeengines.com/handbook/process-vs-thread)
- [Mechanistic Interpretability](https://vibeengines.com/handbook/mech-interp-for-engineers)
- [Agentic Payments](https://vibeengines.com/handbook/agentic-payments)
- [Diffusion LLMs](https://vibeengines.com/handbook/diffusion-llms)
- [Agent Supply-Chain Security](https://vibeengines.com/handbook/agent-supply-chain-security)
- [RL Environments Engineering](https://vibeengines.com/handbook/rl-environments-engineering)
- [MCP Apps](https://vibeengines.com/handbook/mcp-apps)
- [Self-Improving Agents](https://vibeengines.com/handbook/self-improving-agents)
- [Long-Horizon Agents](https://vibeengines.com/handbook/long-horizon-agents)
- [AI-Assisted Interviews](https://vibeengines.com/handbook/ai-assisted-interviews)
- [Autoregressive vs Diffusion LLMs](https://vibeengines.com/handbook/autoregressive-vs-diffusion-llms)
- [Agent Skills vs MCP](https://vibeengines.com/handbook/agent-skills-vs-mcp)
- [Vibe Coding vs Spec-Driven Development](https://vibeengines.com/handbook/vibe-coding-vs-spec-driven-development)
- [Claude Code vs Codex vs Gemini CLI](https://vibeengines.com/handbook/claude-code-vs-codex-vs-gemini-cli)
- [vLLM vs TGI vs SGLang](https://vibeengines.com/handbook/vllm-vs-tgi-vs-sglang)
- [The AI-Era Backend Engineer](https://vibeengines.com/handbook/ai-era-backend-engineer)
- [The AI-Era Frontend Engineer](https://vibeengines.com/handbook/ai-era-frontend-engineer)
- [The AI-Era Product Manager](https://vibeengines.com/handbook/ai-era-product-manager)
- [The AI-Era DevOps Engineer](https://vibeengines.com/handbook/ai-era-devops-engineer)
- [The AI-Era Data Engineer](https://vibeengines.com/handbook/ai-era-data-engineer)

## System Design Walkthroughs
- [Design Uber](https://vibeengines.com/systemdesign/uber-system-design)
- [Design a URL Shortener](https://vibeengines.com/systemdesign/url-shortener-system-design)
- [Design WhatsApp](https://vibeengines.com/systemdesign/whatsapp-system-design)
- [Design Twitter](https://vibeengines.com/systemdesign/twitter-system-design)
- [Design YouTube](https://vibeengines.com/systemdesign/youtube-system-design)
- [Design a Rate Limiter](https://vibeengines.com/systemdesign/rate-limiter-system-design)
- [Design Dropbox](https://vibeengines.com/systemdesign/dropbox-system-design)
- [Design Ticketmaster](https://vibeengines.com/systemdesign/ticketmaster-system-design)
- [Design a Notification System](https://vibeengines.com/systemdesign/notification-system-design)
- [Design Typeahead (Autocomplete)](https://vibeengines.com/systemdesign/typeahead-system-design)
- [Design a Message Queue](https://vibeengines.com/systemdesign/message-queue-system-design)
- [Design a Key-Value Store](https://vibeengines.com/systemdesign/key-value-store-system-design)
- [Design a Distributed Cache](https://vibeengines.com/systemdesign/distributed-cache-system-design)
- [Design a News Feed](https://vibeengines.com/systemdesign/news-feed-system-design)
- [Design a Web Crawler](https://vibeengines.com/systemdesign/web-crawler-system-design)
- [Design Google Docs](https://vibeengines.com/systemdesign/google-docs-system-design)
- [Design a Job Scheduler](https://vibeengines.com/systemdesign/job-scheduler-system-design)
- [Design Netflix](https://vibeengines.com/systemdesign/netflix-system-design)
- [Design Instagram](https://vibeengines.com/systemdesign/instagram-system-design)
- [Design Pastebin](https://vibeengines.com/systemdesign/pastebin-system-design)
- [Design an ID Generator](https://vibeengines.com/systemdesign/distributed-id-generator-system-design)
- [Design a Search Engine](https://vibeengines.com/systemdesign/search-engine-system-design)
- [Design an Ad Click Aggregator](https://vibeengines.com/systemdesign/ad-click-aggregator-system-design)
- [Design Airbnb](https://vibeengines.com/systemdesign/airbnb-system-design)
- [Design Slack](https://vibeengines.com/systemdesign/slack-system-design)
- [Design Google Maps](https://vibeengines.com/systemdesign/google-maps-system-design)
- [Design a Stock Exchange](https://vibeengines.com/systemdesign/stock-exchange-system-design)
- [Design a Payment System](https://vibeengines.com/systemdesign/payment-system-design)
- [Design a CDN](https://vibeengines.com/systemdesign/cdn-system-design)
- [Design a Load Balancer](https://vibeengines.com/systemdesign/load-balancer-system-design)
- [Design an API Gateway](https://vibeengines.com/systemdesign/api-gateway-system-design)
- [Design DNS](https://vibeengines.com/systemdesign/dns-system-design)
- [Design Object Storage](https://vibeengines.com/systemdesign/object-storage-system-design)
- [Design a Distributed File System](https://vibeengines.com/systemdesign/distributed-file-system-system-design)
- [Design a Time-Series Database](https://vibeengines.com/systemdesign/time-series-database-system-design)
- [Design a Metrics & Monitoring System](https://vibeengines.com/systemdesign/metrics-monitoring-system-design)
- [Design a Distributed Tracing System](https://vibeengines.com/systemdesign/distributed-tracing-system-design)
- [Design a Log Search System](https://vibeengines.com/systemdesign/log-search-system-design)
- [Design a Feature Flag System](https://vibeengines.com/systemdesign/feature-flags-system-design)
- [Design a Leaderboard](https://vibeengines.com/systemdesign/leaderboard-system-design)
- [Design a Distributed Counter](https://vibeengines.com/systemdesign/distributed-counter-system-design)
- [Design a Digital Wallet](https://vibeengines.com/systemdesign/digital-wallet-system-design)
- [Design a Fraud Detection System](https://vibeengines.com/systemdesign/fraud-detection-system-design)
- [Design a Video Conferencing System](https://vibeengines.com/systemdesign/video-conferencing-system-design)
- [Design a Live Streaming System](https://vibeengines.com/systemdesign/live-streaming-system-design)
- [Design a Food Delivery System](https://vibeengines.com/systemdesign/food-delivery-system-design)
- [Design a Proximity Service](https://vibeengines.com/systemdesign/proximity-service-system-design)
- [Design a Distributed Lock](https://vibeengines.com/systemdesign/distributed-lock-system-design)
- [Design a Service Discovery System](https://vibeengines.com/systemdesign/service-discovery-system-design)
- [Design a Flash Sale System](https://vibeengines.com/systemdesign/flash-sale-system-design)
- [Design a Collaborative Editor](https://vibeengines.com/systemdesign/collaborative-editor-system-design)
- [Design a Calendar System](https://vibeengines.com/systemdesign/calendar-system-design)
- [Design a Hotel Booking System](https://vibeengines.com/systemdesign/hotel-booking-system-design)
- [Design a Dating App](https://vibeengines.com/systemdesign/dating-app-system-design)
- [Design a Ride-Matching Engine](https://vibeengines.com/systemdesign/ride-matching-system-design)
- [Design a Logging Pipeline](https://vibeengines.com/systemdesign/logging-pipeline-system-design)
- [Design an Email System](https://vibeengines.com/systemdesign/email-system-design)
- [Design an Online Judge](https://vibeengines.com/systemdesign/online-judge-system-design)
- [Design Webhook Ingestion at Scale](https://vibeengines.com/systemdesign/webhook-ingestion-at-scale-system-design)
- [Design a Customer Data Integration Pipeline](https://vibeengines.com/systemdesign/customer-data-integration-pipeline-system-design)
- [Design Multi-Tenant Customer Isolation](https://vibeengines.com/systemdesign/multi-tenant-customer-isolation-system-design)
- [Design an Audit Logging & Compliance Trail](https://vibeengines.com/systemdesign/audit-logging-and-compliance-trail-system-design)

## AI System Design Walkthroughs
- [Design a Conversational AI](https://vibeengines.com/ai-system-design/conversational-ai-system-design)
- [Design a RAG Pipeline](https://vibeengines.com/ai-system-design/rag-pipeline-system-design)
- [Design an AI Agent System](https://vibeengines.com/ai-system-design/ai-agent-system-design)
- [Design an LLM Inference Server](https://vibeengines.com/ai-system-design/llm-inference-serving-system-design)
- [Design a Recommendation System](https://vibeengines.com/ai-system-design/recommendation-system-design)
- [Design a Vector Database](https://vibeengines.com/ai-system-design/vector-database-system-design)
- [Design Semantic Search](https://vibeengines.com/ai-system-design/semantic-search-system-design)
- [Design an LLM Gateway](https://vibeengines.com/ai-system-design/llm-gateway-system-design)
- [Design an LLM Cache](https://vibeengines.com/ai-system-design/llm-cache-system-design)
- [Design a Fine-Tuning Pipeline](https://vibeengines.com/ai-system-design/fine-tuning-pipeline-system-design)
- [Design a Feature Store](https://vibeengines.com/ai-system-design/feature-store-system-design)
- [Design Content Moderation](https://vibeengines.com/ai-system-design/content-moderation-system-design)
- [Design an AI Coding Assistant](https://vibeengines.com/ai-system-design/ai-coding-assistant-system-design)
- [Design Multi-Agent Orchestration](https://vibeengines.com/ai-system-design/multi-agent-orchestration-system-design)
- [Design LLM Eval & Observability](https://vibeengines.com/ai-system-design/llm-eval-observability-system-design)
- [Design an LLM Guardrails System](https://vibeengines.com/ai-system-design/guardrails-system-design)
- [Design a Text-to-Image Service](https://vibeengines.com/ai-system-design/text-to-image-system-design)
- [Design a Speech-to-Text Service](https://vibeengines.com/ai-system-design/speech-to-text-system-design)
- [Design a Text-to-Speech Service](https://vibeengines.com/ai-system-design/text-to-speech-system-design)
- [Design a Realtime Voice Agent](https://vibeengines.com/ai-system-design/voice-agent-system-design)
- [Design an AI Answer Engine](https://vibeengines.com/ai-system-design/ai-answer-engine-system-design)
- [Design an Embeddings Service](https://vibeengines.com/ai-system-design/embeddings-service-system-design)
- [Design a Reranking Service](https://vibeengines.com/ai-system-design/reranking-service-system-design)
- [Design a GraphRAG System](https://vibeengines.com/ai-system-design/graph-rag-system-design)
- [Design a Multimodal RAG System](https://vibeengines.com/ai-system-design/multimodal-rag-system-design)
- [Design an Agent Memory System](https://vibeengines.com/ai-system-design/agent-memory-system-design)
- [Design a Code Execution Sandbox](https://vibeengines.com/ai-system-design/code-sandbox-system-design)
- [Design an LLM Router](https://vibeengines.com/ai-system-design/llm-router-system-design)
- [Design a Batch Inference System](https://vibeengines.com/ai-system-design/batch-inference-system-design)
- [Design a Synthetic Data Pipeline](https://vibeengines.com/ai-system-design/synthetic-data-system-design)
- [Design an RLHF Pipeline](https://vibeengines.com/ai-system-design/rlhf-pipeline-system-design)
- [Design a Document AI Pipeline](https://vibeengines.com/ai-system-design/document-ai-system-design)
- [Design ChatGPT](https://vibeengines.com/ai-system-design/chatgpt-system-design)
- [Design a Computer-Use Agent](https://vibeengines.com/ai-system-design/computer-use-agent-system-design)
- [Design a Deep Research Agent](https://vibeengines.com/ai-system-design/deep-research-agent-system-design)
- [Design an AI Meeting Notetaker](https://vibeengines.com/ai-system-design/ai-meeting-notetaker-system-design)
- [Design a Text-to-Video System](https://vibeengines.com/ai-system-design/text-to-video-system-design)
- [Design an Adaptive AI Tutor](https://vibeengines.com/ai-system-design/ai-tutor-system-design)
- [Design an AI Code Review Bot](https://vibeengines.com/ai-system-design/code-review-bot-system-design)
- [Design an Agent Control Plane](https://vibeengines.com/ai-system-design/agent-control-plane-system-design)
- [Design a Model Registry (MLOps)](https://vibeengines.com/ai-system-design/model-registry-mlops-system-design)
- [Design a GPU Cluster Scheduler](https://vibeengines.com/ai-system-design/gpu-cluster-scheduler-system-design)
- [Design a Data Labeling Platform](https://vibeengines.com/ai-system-design/data-labeling-platform-system-design)
- [Design a Prompt Management & A/B Testing Platform](https://vibeengines.com/ai-system-design/prompt-mgmt-ab-platform-system-design)
- [Design Realtime Speech Translation](https://vibeengines.com/ai-system-design/realtime-translation-system-design)
- [Design an AI Ad Creative Platform](https://vibeengines.com/ai-system-design/ai-ad-creative-system-design)
- [Design a Multi-Tenant AI SaaS Platform](https://vibeengines.com/ai-system-design/multi-tenant-ai-saas-system-design)
- [Design an Autonomous Email Agent](https://vibeengines.com/ai-system-design/email-agent-system-design)
- [Design a Sales CRM Agent](https://vibeengines.com/ai-system-design/sales-crm-agent-system-design)
- [Design a Support Resolution Agent](https://vibeengines.com/ai-system-design/support-resolution-agent-system-design)
- [Design a CI Test-Generation Agent](https://vibeengines.com/ai-system-design/ci-test-gen-agent-system-design)
- [Design a Personal Knowledge Assistant](https://vibeengines.com/ai-system-design/personal-knowledge-assistant-system-design)
- [Design an Edge Inference Fleet](https://vibeengines.com/ai-system-design/edge-inference-fleet-system-design)
- [Design an AI Video Dubbing System](https://vibeengines.com/ai-system-design/ai-video-dubbing-system-design)
- [Deploy an LLM in a Customer’s Environment](https://vibeengines.com/ai-system-design/on-prem-llm-deployment-system-design)
- [Design Secure Document Ingestion + RAG](https://vibeengines.com/ai-system-design/secure-document-ingestion-and-rag-system-design)
- [Design an Agent Payment Gateway](https://vibeengines.com/ai-system-design/agent-payment-gateway-system-design)
- [Design an MCP Security Gateway](https://vibeengines.com/ai-system-design/mcp-security-gateway-system-design)
- [Design an Agentic Browser Security Gateway](https://vibeengines.com/ai-system-design/agentic-browser-security-gateway-system-design)
- [Design a Hybrid Edge-Cloud Agent](https://vibeengines.com/ai-system-design/hybrid-edge-cloud-agent-system-design)
- [Design an RL Environment Farm](https://vibeengines.com/ai-system-design/rl-environment-farm-system-design)

## Algorithms (Played, Not Watched)
- [Dijkstra: The Last Mile](https://vibeengines.com/algorithm/dijkstra-last-mile)
- [Binary Search: The Vault](https://vibeengines.com/algorithm/binary-search)
- [Quicksort: The Pivot Pit](https://vibeengines.com/algorithm/quicksort)
- [Merge Sort: The Cascade](https://vibeengines.com/algorithm/merge-sort)
- [BFS: The Flood](https://vibeengines.com/algorithm/bfs-flood)
- [A* Search: The Ascent](https://vibeengines.com/algorithm/a-star-pathfinding)
- [Sieve of Eratosthenes: Prime Time](https://vibeengines.com/algorithm/sieve-of-eratosthenes)
- [Build Order: DFS & Topological Sort](https://vibeengines.com/algorithm/dfs-topological-sort)
- [Six Degrees: Union-Find](https://vibeengines.com/algorithm/union-find)
- [The Tournament: Heap Sort](https://vibeengines.com/algorithm/heap-sort)
- [The Typo Fixer: Edit Distance](https://vibeengines.com/algorithm/edit-distance)
- [The Cheapest Grid: Kruskal's MST](https://vibeengines.com/algorithm/kruskal-mst)
- [The Patient Router: Bellman-Ford](https://vibeengines.com/algorithm/bellman-ford)
- [The Non-Backtracker: KMP](https://vibeengines.com/algorithm/kmp)
- [The Word Tree: Trie](https://vibeengines.com/algorithm/trie)
- [The Moving Frame: Sliding Window](https://vibeengines.com/algorithm/sliding-window)
- [The Standoff: N-Queens](https://vibeengines.com/algorithm/n-queens)
- [The Instant Lookup: Hash Table](https://vibeengines.com/algorithm/hash-table)
- [The Chain of Nodes: Linked List](https://vibeengines.com/algorithm/linked-list)
- [LIFO & FIFO: Stack & Queue](https://vibeengines.com/algorithm/stack-queue)
- [The Ordered Tree: Binary Search Tree](https://vibeengines.com/algorithm/binary-search-tree)
- [The Segment Tree](https://vibeengines.com/algorithm/segment-tree)
- [The Closing Gap: Two Pointers](https://vibeengines.com/algorithm/two-pointers)
- [The Running Total: Prefix Sums](https://vibeengines.com/algorithm/prefix-sums)
- [The Best Streak: Kadane's Algorithm](https://vibeengines.com/algorithm/kadane)
- [The Loaded Bag: 0/1 Knapsack](https://vibeengines.com/algorithm/knapsack)
- [The Rolling Hash: Rabin-Karp](https://vibeengines.com/algorithm/rabin-karp)
- [No Comparisons: Counting & Radix Sort](https://vibeengines.com/algorithm/counting-sort)
- [The Fewest Coins: Coin Change](https://vibeengines.com/algorithm/coin-change)
- [The Longest Climb: Longest Increasing Subsequence](https://vibeengines.com/algorithm/longest-increasing-subsequence)
- [Bits Do the Walking: Fenwick Tree](https://vibeengines.com/algorithm/fenwick-tree)
- [Every Vertex a Stepping Stone: Floyd–Warshall](https://vibeengines.com/algorithm/floyd-warshall)
- [Find the Peak by Thirds: Ternary Search](https://vibeengines.com/algorithm/ternary-search)
- [Scatter, Sort, Gather: Bucket Sort](https://vibeengines.com/algorithm/bucket-sort)
- [Push, Recurse, Pop: Subsets by Backtracking](https://vibeengines.com/algorithm/subsets-backtracking)
- [Cut the Dead Branches: Combination Sum](https://vibeengines.com/algorithm/combination-sum)
- [Guess, Hit a Wall, Erase: Sudoku Solver](https://vibeengines.com/algorithm/sudoku-solver)
- [The Biggest Tile That Fits: Euclidean GCD](https://vibeengines.com/algorithm/euclidean-gcd)
- [Climb in Doubling Jumps: Modular Exponentiation](https://vibeengines.com/algorithm/modular-exponentiation)
- [Fill the Grid, Walk It Back: Longest Common Subsequence](https://vibeengines.com/algorithm/longest-common-subsequence)
- [Slide the Z-Box: Z-Algorithm](https://vibeengines.com/algorithm/z-algorithm)
- [Sift Up, Sift Down: Heap & Priority Queue](https://vibeengines.com/algorithm/heap-priority-queue)
- [Grow the Cheapest Tree: Prim’s MST](https://vibeengines.com/algorithm/prim-mst)
- [The Tree That Rebalances Itself: AVL Tree](https://vibeengines.com/algorithm/avl-tree)
- [Let the Mirror Do the Work: Manacher’s Algorithm](https://vibeengines.com/algorithm/manacher)
- [Frequent Symbols, Short Codes: Huffman Coding](https://vibeengines.com/algorithm/huffman-coding)
- [Finish First, Fit the Most: Interval Scheduling](https://vibeengines.com/algorithm/interval-scheduling)
- [The Waiting Line: Monotonic Stack](https://vibeengines.com/algorithm/monotonic-stack)
- [The Dutch National Flag: Three-Way Partition](https://vibeengines.com/algorithm/dutch-national-flag)
- [The Last One Standing: Boyer-Moore Majority Vote](https://vibeengines.com/algorithm/boyer-moore-majority)
- [Find the Kth Element: Quickselect](https://vibeengines.com/algorithm/quickselect)
- [The Fair Draw: Reservoir Sampling](https://vibeengines.com/algorithm/reservoir-sampling)
- [Every Number Home: Cyclic Sort](https://vibeengines.com/algorithm/cyclic-sort)
- [Fibonacci Fast-Forwarded: Matrix Exponentiation](https://vibeengines.com/algorithm/matrix-exponentiation)
- [Express Lanes: The Skip List](https://vibeengines.com/algorithm/skip-list)
- [Halving the Exponential: Meet in the Middle](https://vibeengines.com/algorithm/meet-in-the-middle)
- [Two Nodes, Climbing to Meet: LCA with Binary Lifting](https://vibeengines.com/algorithm/lca-binary-lifting)
- [Counting a Crowd in Kilobytes: HyperLogLog](https://vibeengines.com/algorithm/hyperloglog)
- [Cycles Into Components: Tarjan’s SCC](https://vibeengines.com/algorithm/tarjan-scc)
- [How Databases Stay Balanced: B-Trees](https://vibeengines.com/algorithm/b-tree)
- [One Pass, Every Word: Aho-Corasick](https://vibeengines.com/algorithm/aho-corasick)
- [Pushing Water Through Pipes: Dinic’s Max-Flow](https://vibeengines.com/algorithm/dinic-max-flow)
- [Consistent Hashing: The Ring](https://vibeengines.com/algorithm/consistent-hashing)
- [Bloom Filter: Maybe Yes, Never No](https://vibeengines.com/algorithm/bloom-filter)
- [Count–Min Sketch: Counting in Tiny Space](https://vibeengines.com/algorithm/count-min-sketch)
- [Fisher–Yates: The Fair Shuffle](https://vibeengines.com/algorithm/fisher-yates)
- [Radix Sort: Sorting Without Comparing](https://vibeengines.com/algorithm/radix-sort)
- [Bidirectional BFS: Meet in the Middle](https://vibeengines.com/algorithm/bidirectional-bfs)
- [Morris Traversal: Threading the Tree](https://vibeengines.com/algorithm/morris-traversal)
- [LSM-Tree: Write Fast, Merge Later](https://vibeengines.com/algorithm/lsm-tree)
- [Convex Hull: Wrapping the Points](https://vibeengines.com/algorithm/convex-hull)
- [External Merge Sort: Bigger Than Memory](https://vibeengines.com/algorithm/external-merge-sort)
- [Eulerian Path: Every Edge, Once](https://vibeengines.com/algorithm/euler-path)
- [MinHash: Similarity in a Signature](https://vibeengines.com/algorithm/minhash)
- [Line Sweep: Sliding the Line](https://vibeengines.com/algorithm/line-sweep)
- [Miller–Rabin: Probably Prime](https://vibeengines.com/algorithm/miller-rabin)
- [Karatsuba: Three, Not Four](https://vibeengines.com/algorithm/karatsuba)
- [Tree DP: Answers Flow Up](https://vibeengines.com/algorithm/tree-dp)
- [Bridges & Articulation Points: The Weak Links](https://vibeengines.com/algorithm/bridges-articulation)
- [Simulated Annealing: Cool to Improve](https://vibeengines.com/algorithm/simulated-annealing)
- [Extended Euclidean & CRT: gcd, and a Bonus](https://vibeengines.com/algorithm/extended-euclid)
- [Pollard's Rho: Factor by Collision](https://vibeengines.com/algorithm/pollard-rho)
- [Sqrt Decomposition: Blocks of Root-N](https://vibeengines.com/algorithm/sqrt-decomposition)
- [Lazy Segment Tree: Update Lazily](https://vibeengines.com/algorithm/segment-tree-lazy)
- [Bitmask DP: Sets as Integers](https://vibeengines.com/algorithm/bitmask-dp)
- [Interval Tree: What Contains This?](https://vibeengines.com/algorithm/interval-tree)
- [Suffix Array: Suffixes, Sorted](https://vibeengines.com/algorithm/suffix-array)
- [Digit DP: Count by Digits](https://vibeengines.com/algorithm/digit-dp)
- [Treap: Balance by Chance](https://vibeengines.com/algorithm/treap)
- [Splay Tree: Touch It, Lift It](https://vibeengines.com/algorithm/splay-tree)
- [Mo's Algorithm: Reorder to Win](https://vibeengines.com/algorithm/mos-algorithm)
- [Timsort: Sort What's Already There](https://vibeengines.com/algorithm/timsort)
- [Min-Cost Max-Flow: Cheapest Flow First](https://vibeengines.com/algorithm/min-cost-max-flow)
- [Hungarian Algorithm: The Perfect Match](https://vibeengines.com/algorithm/hungarian)
- [FFT: Values, Not Coefficients](https://vibeengines.com/algorithm/fft)
- [Persistent Segment Tree: Every Version Kept](https://vibeengines.com/algorithm/persistent-segment-tree)
- [Red-Black Tree: Balance in Two Colors](https://vibeengines.com/algorithm/red-black-tree)
- [Piece Table & Rope: Edit Without Copying](https://vibeengines.com/algorithm/piece-table)

## Labs (AI & Engineering, Played)
- [Gradient Descent: The Descent](https://vibeengines.com/lab/gradient-descent)
- [The Tokenizer](https://vibeengines.com/lab/tokenizer)
- [The Dice Loader: Sampling](https://vibeengines.com/lab/sampling-explorer)
- [The Gravity Wells: K-Means](https://vibeengines.com/lab/kmeans-clustering)
- [The Meaning Map: Embeddings](https://vibeengines.com/lab/embedding-space)
- [The Sliding Stencil: Convolution](https://vibeengines.com/lab/image-convolution)
- [The Spotlight: Attention](https://vibeengines.com/lab/attention-visualizer)
- [Out of the Static: Diffusion](https://vibeengines.com/lab/diffusion-denoise)
- [The Bend: Activation Functions](https://vibeengines.com/lab/activation-functions)
- [The Line-Drawer: Perceptron](https://vibeengines.com/lab/perceptron-playground)
- [The Loop: Agent Loop Simulator](https://vibeengines.com/lab/agent-loop-simulator)
- [The Break-In: Prompt Injection](https://vibeengines.com/lab/prompt-injection-playground)
- [The Loop Designer: Outer Loops](https://vibeengines.com/lab/loop-designer)
- [The Memory Tax: KV-Cache Visualizer](https://vibeengines.com/lab/kv-cache-visualizer)
- [The Skip-List of Space: HNSW](https://vibeengines.com/lab/hnsw-visualizer)
- [The Understudy: Speculative Decoding](https://vibeengines.com/lab/speculative-decoding)
- [The Rounding Room: Quantization](https://vibeengines.com/lab/quantization-lab)
- [The Switchboard: Mixture of Experts](https://vibeengines.com/lab/moe-routing)
- [The Crowded Desk: Context Rot](https://vibeengines.com/lab/context-rot-demo)
- [The Assembly Line: Batching & Throughput](https://vibeengines.com/lab/batching-simulator)
- [The Taste Trainer: RLHF & DPO](https://vibeengines.com/lab/rlhf-preference-lab)
- [The Blame Machine: Backpropagation](https://vibeengines.com/lab/backprop-visualizer)
- [Raft: The Election](https://vibeengines.com/lab/raft-simulator)
- [The Quorum Dial](https://vibeengines.com/lab/quorum-simulator)
- [Vector Clocks: Who Caused What](https://vibeengines.com/lab/vector-clocks)
- [CRDT Merge: No Conflict](https://vibeengines.com/lab/crdt-merge)
- [The Rumor Mill: Gossip](https://vibeengines.com/lab/gossip-sim)
- [The Eviction Race: LRU vs LFU](https://vibeengines.com/lab/eviction-race)
- [The Load Balancer](https://vibeengines.com/lab/load-balancer-sim)
- [Backpressure: The Bounded Queue](https://vibeengines.com/lab/queue-backpressure)
- [The TCP Sawtooth](https://vibeengines.com/lab/tcp-congestion)
- [The DNS Journey](https://vibeengines.com/lab/dns-journey)
- [The TLS Handshake](https://vibeengines.com/lab/tls-handshake)
- [The Query Planner](https://vibeengines.com/lab/sql-planner)
- [B-Tree vs LSM-Tree](https://vibeengines.com/lab/btree-vs-lsm-race)
- [The Git Object Graph](https://vibeengines.com/lab/git-object-graph)
- [How a Regex Runs: The NFA](https://vibeengines.com/lab/regex-nfa)
- [The Optimizer Race](https://vibeengines.com/lab/optimizer-race)
- [The Loss Landscape](https://vibeengines.com/lab/loss-landscape)
- [Inside a Transformer: Self-Attention](https://vibeengines.com/lab/transformer-forward-pass)
- [RoPE: Position by Rotation](https://vibeengines.com/lab/rope-positional-lab)
- [Chain-of-Thought vs Direct](https://vibeengines.com/lab/cot-vs-direct)
- [The MCP Playground](https://vibeengines.com/lab/mcp-playground)
- [The Latent Walk](https://vibeengines.com/lab/gan-latent-walk)
- [The Deployment Target Chooser](https://vibeengines.com/lab/deployment-target-chooser)
- [The Integration Reliability Lab](https://vibeengines.com/lab/integration-reliability-lab)
- [The Data Mapping Lab](https://vibeengines.com/lab/data-mapping-lab)
- [The Rollout Strategy Lab](https://vibeengines.com/lab/rollout-strategy-lab)
- [The Scoping Simulator](https://vibeengines.com/lab/scoping-simulator)
- [All At Once — Text Diffusion Decoding](https://vibeengines.com/lab/text-diffusion-decoding)
- [The Million-Token Bill — Sparse Attention](https://vibeengines.com/lab/sparse-attention-1m)

## Coding Challenges (DSA & AI Engineering)
- [Two Sum](https://vibeengines.com/challenge/two-sum)
- [Valid Parentheses](https://vibeengines.com/challenge/valid-parentheses)
- [Fizz Buzz](https://vibeengines.com/challenge/fizzbuzz)
- [Softmax](https://vibeengines.com/challenge/softmax)
- [Cosine Similarity](https://vibeengines.com/challenge/cosine-similarity)
- [Top-K Retrieval](https://vibeengines.com/challenge/top-k-retrieval)
- [Token-Level F1](https://vibeengines.com/challenge/token-f1)
- [Single-Head Attention](https://vibeengines.com/challenge/single-head-attention)
- [Layer Normalization](https://vibeengines.com/challenge/layer-norm)
- [Cross-Entropy Loss](https://vibeengines.com/challenge/cross-entropy)
- [K-Nearest Neighbors](https://vibeengines.com/challenge/knn)
- [TF-IDF](https://vibeengines.com/challenge/tf-idf)
- [LRU Cache](https://vibeengines.com/challenge/lru-cache)
- [Retry with Exponential Backoff](https://vibeengines.com/challenge/retry-backoff)
- [Trim History to a Token Budget](https://vibeengines.com/challenge/token-budget-trim)
- [Parse a Tool Call](https://vibeengines.com/challenge/tool-call-parser)
- [Run the Goal Loop](https://vibeengines.com/challenge/goal-loop)
- [BM25 Scoring](https://vibeengines.com/challenge/bm25)
- [BPE Merge Step](https://vibeengines.com/challenge/bpe-merge)
- [MMR Reranking](https://vibeengines.com/challenge/mmr-rerank)
- [Streaming Median](https://vibeengines.com/challenge/streaming-median)
- [Token Bucket Rate Limiter](https://vibeengines.com/challenge/token-bucket)
- [Circuit Breaker](https://vibeengines.com/challenge/circuit-breaker)
- [Beam Search Decoder](https://vibeengines.com/challenge/beam-search)
- [Number of Islands](https://vibeengines.com/challenge/number-of-islands)
- [Merge Intervals](https://vibeengines.com/challenge/merge-intervals)
- [Top-K Frequent Elements](https://vibeengines.com/challenge/top-k-frequent)
- [3Sum](https://vibeengines.com/challenge/three-sum)
- [Union-Find (Connected Components)](https://vibeengines.com/challenge/union-find)
- [Min Stack](https://vibeengines.com/challenge/min-stack)
- [Sliding-Window Rate Limiter](https://vibeengines.com/challenge/sliding-window-rate-limiter)
- [LFU Cache](https://vibeengines.com/challenge/lfu-cache)
- [Consistent Hashing Ring](https://vibeengines.com/challenge/consistent-hash-ring)
- [Bloom Filter](https://vibeengines.com/challenge/build-bloom-filter)
- [Implement a Trie](https://vibeengines.com/challenge/implement-trie)
- [KMP Failure Table](https://vibeengines.com/challenge/kmp-failure-table)
- [Longest Common Subsequence](https://vibeengines.com/challenge/lcs-diff)
- [Mini Regex Matcher (. and *)](https://vibeengines.com/challenge/mini-regex-matcher)
- [Expression Calculator](https://vibeengines.com/challenge/expression-calculator)
- [JSON Parser (Recursive Descent)](https://vibeengines.com/challenge/json-parser)
- [Dijkstra’s Shortest Paths](https://vibeengines.com/challenge/dijkstra)
- [A* Pathfinding on a Grid](https://vibeengines.com/challenge/a-star-grid)
- [Course Schedule (Cycle Detection)](https://vibeengines.com/challenge/course-schedule)
- [Word Ladder](https://vibeengines.com/challenge/word-ladder)
- [Matrix Exponentiation](https://vibeengines.com/challenge/matrix-power)
- [Skip List Insert & Search](https://vibeengines.com/challenge/skiplist-insert)
- [Reservoir Sampling](https://vibeengines.com/challenge/reservoir-sample)
- [HyperLogLog Cardinality Estimator](https://vibeengines.com/challenge/hll-cardinality)
- [Raft Leader Election (Majority)](https://vibeengines.com/challenge/raft-election-step)
- [Vector Clock Merge](https://vibeengines.com/challenge/vector-clock-merge)
- [CRDT: Grow-Only Counter](https://vibeengines.com/challenge/crdt-gcounter)
- [Softmax with Temperature](https://vibeengines.com/challenge/softmax-temperature)
- [Semantic Chunker (Token Budget)](https://vibeengines.com/challenge/semantic-chunker)
- [Speculative Decoding: Accept Step](https://vibeengines.com/challenge/speculative-accept)
- [KV-Cache Eviction (Attention Sinks)](https://vibeengines.com/challenge/kv-eviction)
- [Constrained Decoding (Logit Masking)](https://vibeengines.com/challenge/constrained-decode)
- [Verify a Webhook Signature](https://vibeengines.com/challenge/webhook-signature-verify)
- [Idempotency Key Handler](https://vibeengines.com/challenge/idempotency-key-handler)
- [CSV → Schema Mapper](https://vibeengines.com/challenge/csv-schema-mapper)
- [Data Reconciliation Diff](https://vibeengines.com/challenge/data-reconciliation-diff)
- [PII Redactor](https://vibeengines.com/challenge/pii-redactor)
- [Config Validator](https://vibeengines.com/challenge/config-validator)
- [API Pagination Collector](https://vibeengines.com/challenge/api-pagination-collector)
- [Exponential Backoff with Full Jitter](https://vibeengines.com/challenge/backoff-jitter)
- [Write a Verifier](https://vibeengines.com/challenge/write-a-verifier)
- [Build Your Own Agent Loop](https://vibeengines.com/challenge/build-your-own-agent-loop)
- [Spot the Bug in AI Code](https://vibeengines.com/challenge/spot-the-bug-in-ai-code)
- [Read the Codebase, Fix the Bug](https://vibeengines.com/challenge/code-comprehension-rpn)

## Paper Breakdowns
- [Attention Is All You Need](https://vibeengines.com/paper/attention-is-all-you-need)
- [BERT](https://vibeengines.com/paper/bert)
- [Retrieval-Augmented Generation](https://vibeengines.com/paper/rag)
- [Chain-of-Thought Prompting](https://vibeengines.com/paper/chain-of-thought)
- [LoRA](https://vibeengines.com/paper/lora)
- [ReAct](https://vibeengines.com/paper/react)
- [Direct Preference Optimization](https://vibeengines.com/paper/dpo)
- [Chinchilla](https://vibeengines.com/paper/chinchilla)
- [FlashAttention](https://vibeengines.com/paper/flash-attention)
- [Mixture of Experts](https://vibeengines.com/paper/mixture-of-experts)
- [Word2Vec](https://vibeengines.com/paper/word2vec)
- [ResNet](https://vibeengines.com/paper/resnet)
- [Diffusion Models](https://vibeengines.com/paper/diffusion-models)
- [CLIP](https://vibeengines.com/paper/clip)
- [GPT-3](https://vibeengines.com/paper/gpt-3)
- [InstructGPT](https://vibeengines.com/paper/instructgpt)
- [Llama 2](https://vibeengines.com/paper/llama-2)
- [Scaling Laws](https://vibeengines.com/paper/scaling-laws)
- [T5](https://vibeengines.com/paper/t5)
- [Vision Transformer (ViT)](https://vibeengines.com/paper/vision-transformer)
- [Latent Diffusion](https://vibeengines.com/paper/latent-diffusion)
- [DDPM](https://vibeengines.com/paper/ddpm)
- [GANs](https://vibeengines.com/paper/gans)
- [AlexNet](https://vibeengines.com/paper/alexnet)
- [Seq2Seq](https://vibeengines.com/paper/seq2seq)
- [Mamba](https://vibeengines.com/paper/mamba)
- [Whisper](https://vibeengines.com/paper/whisper)
- [Segment Anything (SAM)](https://vibeengines.com/paper/segment-anything)
- [DeepSeek-R1](https://vibeengines.com/paper/deepseek-r1)
- [Toolformer](https://vibeengines.com/paper/toolformer)
- [GRPO (DeepSeekMath)](https://vibeengines.com/paper/grpo)
- [Titans](https://vibeengines.com/paper/titans)
- [Constitutional AI](https://vibeengines.com/paper/constitutional-ai)
- [Self-Consistency](https://vibeengines.com/paper/self-consistency)
- [Tree of Thoughts](https://vibeengines.com/paper/tree-of-thoughts)
- [QLoRA](https://vibeengines.com/paper/qlora)
- [MemGPT](https://vibeengines.com/paper/memgpt)
- [Reflexion](https://vibeengines.com/paper/reflexion)
- [Voyager](https://vibeengines.com/paper/voyager)
- [Generative Agents](https://vibeengines.com/paper/generative-agents)
- [DeepSeek-V3](https://vibeengines.com/paper/deepseek-v3)
- [Kimi K2](https://vibeengines.com/paper/kimi-k2)
- [Adam](https://vibeengines.com/paper/adam)
- [Dropout](https://vibeengines.com/paper/dropout)
- [Batch Normalization](https://vibeengines.com/paper/batch-norm)
- [LayerNorm & RMSNorm](https://vibeengines.com/paper/layernorm-rmsnorm)
- [Speculative Decoding](https://vibeengines.com/paper/speculative-decoding)
- [RoPE (RoFormer)](https://vibeengines.com/paper/rope-roformer)
- [ColBERT](https://vibeengines.com/paper/colbert)
- [Sentence-BERT](https://vibeengines.com/paper/sentence-bert)
- [Switch Transformer](https://vibeengines.com/paper/switch-transformer)
- [PagedAttention (vLLM)](https://vibeengines.com/paper/vllm-pagedattention)
- [Masked Autoencoders](https://vibeengines.com/paper/mae)
- [SimCLR](https://vibeengines.com/paper/simclr)
- [Longformer](https://vibeengines.com/paper/longformer)
- [Medusa](https://vibeengines.com/paper/medusa)
- [Let's Verify Step by Step](https://vibeengines.com/paper/lets-verify-step-by-step)
- [Product Quantization](https://vibeengines.com/paper/product-quantization)
- [GraphRAG](https://vibeengines.com/paper/graphrag)
- [Textbooks Are All You Need (Phi)](https://vibeengines.com/paper/phi)
- [Transformer-XL](https://vibeengines.com/paper/transformer-xl)
- [Ring Attention](https://vibeengines.com/paper/ring-attention)
- [Muon](https://vibeengines.com/paper/muon)
- [Flamingo](https://vibeengines.com/paper/flamingo)
- [DINOv2](https://vibeengines.com/paper/dinov2)
- [3D Gaussian Splatting](https://vibeengines.com/paper/gaussian-splatting)
- [NeRF](https://vibeengines.com/paper/nerf)
- [LLaVA](https://vibeengines.com/paper/llava)
- [STaR](https://vibeengines.com/paper/star)
- [AlphaGo](https://vibeengines.com/paper/alphago)
- [MuZero](https://vibeengines.com/paper/muzero)
- [AlphaFold 2](https://vibeengines.com/paper/alphafold-2)
- [Codex](https://vibeengines.com/paper/codex)
- [SWE-bench & SWE-agent](https://vibeengines.com/paper/swe-agent)
- [AlphaCode](https://vibeengines.com/paper/alphacode)
- [Llama 3](https://vibeengines.com/paper/llama-3)
- [Gemini 1.5](https://vibeengines.com/paper/gemini-1-5)
- [Sora](https://vibeengines.com/paper/sora)
- [V-JEPA](https://vibeengines.com/paper/v-jepa)
- [RT-2](https://vibeengines.com/paper/rt-2)
- [Genie](https://vibeengines.com/paper/genie)
- [PaLM](https://vibeengines.com/paper/palm)
- [Qwen3](https://vibeengines.com/paper/qwen3)
- [Dense Passage Retrieval](https://vibeengines.com/paper/dpr)
- [HNSW](https://vibeengines.com/paper/hnsw)
- [GPT-4 Technical Report](https://vibeengines.com/paper/gpt-4-report)
- [OpenAI o1](https://vibeengines.com/paper/o1-system-card)
- [VAE](https://vibeengines.com/paper/vae)
- [PPO](https://vibeengines.com/paper/ppo)
- [DQN](https://vibeengines.com/paper/dqn)
- [Classifier-Free Guidance](https://vibeengines.com/paper/classifier-free-guidance)
- [Knowledge Distillation](https://vibeengines.com/paper/knowledge-distillation)
- [VQ-VAE](https://vibeengines.com/paper/vq-vae)
- [Graph Neural Networks](https://vibeengines.com/paper/graph-neural-networks)
- [GloVe](https://vibeengines.com/paper/glove)
- [The Lottery Ticket Hypothesis](https://vibeengines.com/paper/lottery-ticket-hypothesis)
- [DDIM](https://vibeengines.com/paper/ddim)
- [Self-Instruct](https://vibeengines.com/paper/self-instruct)
- [mixup](https://vibeengines.com/paper/mixup)
- [AlphaZero](https://vibeengines.com/paper/alphazero)
- [wav2vec 2.0](https://vibeengines.com/paper/wav2vec2)
- [DeepSeek-V4](https://vibeengines.com/paper/deepseek-v4)
- [Kimi K3](https://vibeengines.com/paper/kimi-k3)
- [LLMs Get Lost in Multi-Turn Conversation](https://vibeengines.com/paper/llms-lost-multi-turn)
- [Engram](https://vibeengines.com/paper/engram)
- [Qwen4-Coder](https://vibeengines.com/paper/qwen4-coder)
- [GPT-5.6 System Card](https://vibeengines.com/paper/gpt-5-6-system-card)
- [Concept Circuits](https://vibeengines.com/paper/concept-circuits)

## Roadmaps
- [Prompt Engineering Roadmap](https://vibeengines.com/roadmap/prompt-engineering)
- [Data Structures & Algorithms Roadmap](https://vibeengines.com/roadmap/dsa-roadmap)
- [AI Engineer Roadmap](https://vibeengines.com/roadmap/ai-engineer)
- [MLOps Roadmap](https://vibeengines.com/roadmap/mlops)
- [System Design Roadmap](https://vibeengines.com/roadmap/system-design)
- [Generative AI Roadmap](https://vibeengines.com/roadmap/genai)
- [Backend Engineer Roadmap](https://vibeengines.com/roadmap/backend-engineer)
- [Frontend Engineer Roadmap](https://vibeengines.com/roadmap/frontend-engineer)
- [DevOps Roadmap](https://vibeengines.com/roadmap/devops)
- [Data Engineer Roadmap](https://vibeengines.com/roadmap/data-engineer)
- [Machine Learning Roadmap](https://vibeengines.com/roadmap/machine-learning)
- [Cloud / AWS Roadmap](https://vibeengines.com/roadmap/cloud-aws)
- [AI Harness Roadmap](https://vibeengines.com/roadmap/ai-harness-engineer)
- [Forward-Deployed Engineer Roadmap](https://vibeengines.com/roadmap/forward-deployed-engineer)
- [Security Engineer Roadmap](https://vibeengines.com/roadmap/security-engineer)
- [Platform Engineer Roadmap](https://vibeengines.com/roadmap/platform-engineer)
- [Data Scientist Roadmap](https://vibeengines.com/roadmap/data-scientist)
- [SRE Roadmap](https://vibeengines.com/roadmap/sre)
- [Engineering Manager Roadmap](https://vibeengines.com/roadmap/engineering-manager)
- [QA / SDET Roadmap](https://vibeengines.com/roadmap/qa-sdet)
- [Solutions Architect Roadmap](https://vibeengines.com/roadmap/solutions-architect)
- [Mobile Engineer Roadmap](https://vibeengines.com/roadmap/mobile-engineer)
- [AI Safety Engineer Roadmap](https://vibeengines.com/roadmap/ai-safety-engineer)
- [Agentic AI Engineer Roadmap](https://vibeengines.com/roadmap/agentic-ai-engineer)
- [AI Red-Teamer Roadmap](https://vibeengines.com/roadmap/ai-red-teamer)

## Free Interactive Tools
- [Consistent Hashing Visualizer](https://vibeengines.com/tools/consistent-hashing)
- [Interactive Capacity Estimator](https://vibeengines.com/tools/capacity-estimator)
- [RAG Chunking Playground](https://vibeengines.com/tools/rag-chunking)
- [Context Budget & Cost Planner](https://vibeengines.com/tools/context-cost-planner)
- [Quorum (N/R/W) Explorer](https://vibeengines.com/tools/quorum-explorer)
- [Availability (Nines) Calculator](https://vibeengines.com/tools/availability-calculator)
- [LLM-as-Judge Rubric Builder](https://vibeengines.com/tools/llm-judge-builder)
- [Tool-Schema Designer](https://vibeengines.com/tools/tool-schema-designer)
- [Percentile Calculator](https://vibeengines.com/tools/percentile-calculator)
- [LLM Pricing Comparator](https://vibeengines.com/tools/model-pricing-comparator)
- [Bloom Filter Sizing](https://vibeengines.com/tools/bloom-filter-sizing)
- [Token Bucket Simulator](https://vibeengines.com/tools/token-bucket-simulator)
- [Context Window Visualizer](https://vibeengines.com/tools/context-window-visualizer)
- [Token Counter](https://vibeengines.com/tools/token-counter)
- [GPU VRAM Calculator](https://vibeengines.com/tools/gpu-vram-calculator)
- [Fine-Tuning Cost Estimator](https://vibeengines.com/tools/fine-tuning-cost-estimator)
- [KV Cache Calculator](https://vibeengines.com/tools/kv-cache-calculator)
- [Embedding Cost Calculator](https://vibeengines.com/tools/embedding-cost-calculator)
- [Latency Budget Builder](https://vibeengines.com/tools/latency-budget-builder)
- [SLO Burn-Rate Calculator](https://vibeengines.com/tools/slo-burn-calculator)
- [Model Comparison Table](https://vibeengines.com/tools/model-comparison)
- [Training Compute Calculator](https://vibeengines.com/tools/training-compute-calculator)
- [Little's Law Calculator](https://vibeengines.com/tools/littles-law-calculator)
- [Prompt Caching Savings Calculator](https://vibeengines.com/tools/prompt-caching-calculator)
- [JWT Decoder](https://vibeengines.com/tools/jwt-decoder)
- [CIDR Calculator](https://vibeengines.com/tools/cidr-calculator)
- [Unix Time Converter](https://vibeengines.com/tools/unix-time-converter)
- [UUID & ULID Generator](https://vibeengines.com/tools/uuid-ulid-generator)
- [Regex Tester](https://vibeengines.com/tools/regex-tester)
- [Base64 & URL Encoder](https://vibeengines.com/tools/base64-url-tools)
- [Chmod Calculator](https://vibeengines.com/tools/chmod-calculator)
- [Password Entropy Calculator](https://vibeengines.com/tools/password-entropy)
- [Cron Expression Builder](https://vibeengines.com/tools/cron-builder)
- [SQL Formatter](https://vibeengines.com/tools/sql-formatter)
- [Markdown Table Generator](https://vibeengines.com/tools/md-table-generator)
- [Diff Checker](https://vibeengines.com/tools/diff-checker)
- [A/B Test Significance Calculator](https://vibeengines.com/tools/ab-significance-calculator)
- [Kafka Partition Calculator](https://vibeengines.com/tools/kafka-partition-calculator)
- [Connection Pool Sizer](https://vibeengines.com/tools/connection-pool-sizer)
- [Database Index Size Estimator](https://vibeengines.com/tools/db-index-size-estimator)
- [JSON Formatter & Diff](https://vibeengines.com/tools/json-format-diff)
- [Cache ROI Calculator](https://vibeengines.com/tools/cache-roi-calculator)
- [Storage Growth Forecaster](https://vibeengines.com/tools/storage-growth-forecaster)
- [Rate Limit Designer](https://vibeengines.com/tools/rate-limit-designer)
- [Agent Loop Cost Estimator](https://vibeengines.com/tools/agent-loop-cost-estimator)
- [Sharding Planner](https://vibeengines.com/tools/sharding-planner)
- [Embedding Dimension Tradeoff](https://vibeengines.com/tools/embedding-dim-tradeoff)
- [Latency Numbers Explorer](https://vibeengines.com/tools/latency-numbers-interactive)
- [GPU Rental Price Reference](https://vibeengines.com/tools/gpu-rental-prices)
- [NPU Model-Fit Calculator](https://vibeengines.com/tools/npu-model-fit-calculator)
- [Agent Time-Horizon Explorer](https://vibeengines.com/tools/agent-time-horizon-explorer)
- [Skill Linter](https://vibeengines.com/tools/skill-linter)
- [EU AI Act Timeline](https://vibeengines.com/tools/eu-ai-act-timeline)
- [AI Salary Explorer](https://vibeengines.com/tools/ai-salary-explorer)

## Cheatsheets (printable one-page references)
- [Big-O Complexity](https://vibeengines.com/cheatsheet/big-o)
- [LLM Sampling & Decoding](https://vibeengines.com/cheatsheet/llm-decoding)
- [HTTP Status Codes](https://vibeengines.com/cheatsheet/http-status)
- [System Design Napkin Math](https://vibeengines.com/cheatsheet/napkin-math)
- [The Agent Loop Cheatsheet](https://vibeengines.com/cheatsheet/agent-loop)
- [Loop Engineering](https://vibeengines.com/cheatsheet/loop-engineering)
- [Sorting Algorithms](https://vibeengines.com/cheatsheet/sorting-algorithms)
- [Graph Algorithms](https://vibeengines.com/cheatsheet/graph-algorithms)
- [Dynamic Programming Patterns](https://vibeengines.com/cheatsheet/dp-patterns)
- [Transformer Math](https://vibeengines.com/cheatsheet/transformer-math)
- [GPU Numbers Every AI Engineer Should Know](https://vibeengines.com/cheatsheet/gpu-numbers)
- [Prompt Patterns](https://vibeengines.com/cheatsheet/prompt-patterns)
- [Evals & Metrics](https://vibeengines.com/cheatsheet/evals-metrics)
- [MCP Quick Reference](https://vibeengines.com/cheatsheet/mcp)
- [Git Survival Guide](https://vibeengines.com/cheatsheet/git)
- [SQL Quick Reference](https://vibeengines.com/cheatsheet/sql)
- [Regex Without Tears](https://vibeengines.com/cheatsheet/regex)
- [Bash & The Terminal](https://vibeengines.com/cheatsheet/bash)
- [Pandas & NumPy](https://vibeengines.com/cheatsheet/pandas-numpy)
- [kubectl Quick Reference](https://vibeengines.com/cheatsheet/kubectl)
- [Docker Survival Guide](https://vibeengines.com/cheatsheet/docker)
- [Linux Debugging Toolkit](https://vibeengines.com/cheatsheet/linux-debug)
- [Network CLI Toolkit](https://vibeengines.com/cheatsheet/network-cli)
- [Vim Survival Guide](https://vibeengines.com/cheatsheet/vim)
- [tmux Quick Reference](https://vibeengines.com/cheatsheet/tmux)
- [curl Quick Reference](https://vibeengines.com/cheatsheet/curl)
- [jq Quick Reference](https://vibeengines.com/cheatsheet/jq)
- [psql Quick Reference](https://vibeengines.com/cheatsheet/psql)
- [redis-cli Quick Reference](https://vibeengines.com/cheatsheet/redis-cli)
- [Kafka CLI Quick Reference](https://vibeengines.com/cheatsheet/kafka-cli)
- [Python Standard Library](https://vibeengines.com/cheatsheet/python-stdlib)
- [TypeScript Types Quick Reference](https://vibeengines.com/cheatsheet/typescript)
- [React Hooks Quick Reference](https://vibeengines.com/cheatsheet/react-hooks)
- [CSS Flexbox & Grid](https://vibeengines.com/cheatsheet/css-flex-grid)
- [Data Structure Complexity](https://vibeengines.com/cheatsheet/ds-complexity)
- [HTTP Headers Quick Reference](https://vibeengines.com/cheatsheet/http-headers)
- [SQL Window Functions](https://vibeengines.com/cheatsheet/sql-window-functions)
- [Git Advanced (Rebase, Bisect, Worktree)](https://vibeengines.com/cheatsheet/git-advanced)
- [Keyboard Shortcuts (Editor & Terminal)](https://vibeengines.com/cheatsheet/shortcuts)
- [Claude Code (Agentic CLI)](https://vibeengines.com/cheatsheet/claude-code-agentic-cli)
- [API Security Checklist](https://vibeengines.com/cheatsheet/api-security-checklist)
- [The Forward Deployed Engineer Playbook](https://vibeengines.com/cheatsheet/fde-playbook)
- [Customer Discovery Questions](https://vibeengines.com/cheatsheet/customer-discovery-questions)
- [The Demo Checklist](https://vibeengines.com/cheatsheet/demo-checklist)
- [Integration Debugging Playbook](https://vibeengines.com/cheatsheet/integration-debugging)
- [Deployment Targets (Cloud → Air-Gapped)](https://vibeengines.com/cheatsheet/deployment-targets)
- [Security & Compliance Quick-Ref (FDE)](https://vibeengines.com/cheatsheet/security-compliance-quickref)
- [POC → Production Checklist](https://vibeengines.com/cheatsheet/poc-to-production-checklist)

## Glossary (AI & system-design terms, defined)
- [Attention](https://vibeengines.com/glossary/attention)
- [Transformer](https://vibeengines.com/glossary/transformer)
- [Token](https://vibeengines.com/glossary/token)
- [Tokenization](https://vibeengines.com/glossary/tokenization)
- [Embedding](https://vibeengines.com/glossary/embedding)
- [Context Window](https://vibeengines.com/glossary/context-window)
- [Agent](https://vibeengines.com/glossary/agent)
- [Loop Engineering](https://vibeengines.com/glossary/loop-engineering)
- [Tool Calling](https://vibeengines.com/glossary/tool-calling)
- [Model Context Protocol (MCP)](https://vibeengines.com/glossary/mcp)
- [Prompt Injection](https://vibeengines.com/glossary/prompt-injection)
- [Retrieval-Augmented Generation (RAG)](https://vibeengines.com/glossary/rag)
- [Vector Database](https://vibeengines.com/glossary/vector-database)
- [Cosine Similarity](https://vibeengines.com/glossary/cosine-similarity)
- [Hallucination](https://vibeengines.com/glossary/hallucination)
- [LLM-as-a-Judge](https://vibeengines.com/glossary/llm-as-judge)
- [Temperature](https://vibeengines.com/glossary/temperature)
- [Softmax](https://vibeengines.com/glossary/softmax)
- [Cross-Entropy Loss](https://vibeengines.com/glossary/cross-entropy)
- [Fine-Tuning](https://vibeengines.com/glossary/fine-tuning)
- [Prompt Caching](https://vibeengines.com/glossary/prompt-caching)
- [Mixture of Experts (MoE)](https://vibeengines.com/glossary/mixture-of-experts)
- [Chain of Thought](https://vibeengines.com/glossary/chain-of-thought)
- [CAP Theorem](https://vibeengines.com/glossary/cap-theorem)
- [Consistent Hashing](https://vibeengines.com/glossary/consistent-hashing)
- [Idempotency](https://vibeengines.com/glossary/idempotency)
- [Rate Limiting](https://vibeengines.com/glossary/rate-limiting)
- [Sharding](https://vibeengines.com/glossary/sharding)
- [Bloom Filter](https://vibeengines.com/glossary/bloom-filter)
- [Quorum (N/R/W)](https://vibeengines.com/glossary/quorum)
- [Eventual Consistency](https://vibeengines.com/glossary/eventual-consistency)
- [Backpressure](https://vibeengines.com/glossary/backpressure)
- [Cache Invalidation](https://vibeengines.com/glossary/cache-invalidation)
- [p99 Latency](https://vibeengines.com/glossary/p99-latency)
- [Context Engineering](https://vibeengines.com/glossary/context-engineering)
- [KV Cache](https://vibeengines.com/glossary/kv-cache)
- [Quantization](https://vibeengines.com/glossary/quantization)
- [Distillation](https://vibeengines.com/glossary/distillation)
- [Speculative Decoding](https://vibeengines.com/glossary/speculative-decoding)
- [LoRA](https://vibeengines.com/glossary/lora)
- [RLHF](https://vibeengines.com/glossary/rlhf)
- [DPO](https://vibeengines.com/glossary/dpo)
- [GRPO](https://vibeengines.com/glossary/grpo)
- [Test-Time Compute](https://vibeengines.com/glossary/test-time-compute)
- [Guardrails](https://vibeengines.com/glossary/guardrails)
- [Jailbreak](https://vibeengines.com/glossary/jailbreak)
- [System Prompt](https://vibeengines.com/glossary/system-prompt)
- [Structured Outputs](https://vibeengines.com/glossary/structured-outputs)
- [Few-Shot Prompting](https://vibeengines.com/glossary/few-shot)
- [Top-p Sampling](https://vibeengines.com/glossary/top-p)
- [Beam Search](https://vibeengines.com/glossary/beam-search)
- [Perplexity](https://vibeengines.com/glossary/perplexity)
- [Grounding](https://vibeengines.com/glossary/grounding)
- [Continuous Batching](https://vibeengines.com/glossary/batching)
- [Time to First Token](https://vibeengines.com/glossary/ttft)
- [Agent Skills](https://vibeengines.com/glossary/agent-skills)
- [Harness](https://vibeengines.com/glossary/harness)
- [World Model](https://vibeengines.com/glossary/world-model)
- [Multimodal Model](https://vibeengines.com/glossary/multimodal)
- [Chunking](https://vibeengines.com/glossary/chunking)
- [BM25](https://vibeengines.com/glossary/bm25)
- [Hybrid Search](https://vibeengines.com/glossary/hybrid-search)
- [Reranking](https://vibeengines.com/glossary/reranking)
- [HNSW](https://vibeengines.com/glossary/hnsw)
- [Raft](https://vibeengines.com/glossary/raft)
- [Leader Election](https://vibeengines.com/glossary/leader-election)
- [Two-Phase Commit](https://vibeengines.com/glossary/two-phase-commit)
- [Saga Pattern](https://vibeengines.com/glossary/saga-pattern)
- [Outbox Pattern](https://vibeengines.com/glossary/outbox-pattern)
- [Change Data Capture](https://vibeengines.com/glossary/cdc)
- [Write-Ahead Log](https://vibeengines.com/glossary/wal)
- [LSM Tree](https://vibeengines.com/glossary/lsm-tree)
- [B-Tree](https://vibeengines.com/glossary/b-tree)
- [Gossip Protocol](https://vibeengines.com/glossary/gossip-protocol)
- [Vector Clock](https://vibeengines.com/glossary/vector-clock)
- [A2A Protocol](https://vibeengines.com/glossary/a2a)
- [SWE-bench](https://vibeengines.com/glossary/swe-bench)
- [Vibe Coding](https://vibeengines.com/glossary/vibe-coding)
- [Circuit Breaker](https://vibeengines.com/glossary/circuit-breaker)
- [Tensor Parallelism](https://vibeengines.com/glossary/tensor-parallelism)
- [Pipeline Parallelism](https://vibeengines.com/glossary/pipeline-parallelism)
- [Data Parallelism](https://vibeengines.com/glossary/data-parallelism)
- [ZeRO / FSDP](https://vibeengines.com/glossary/zero-redundancy-optimizer)
- [Gradient Checkpointing](https://vibeengines.com/glossary/gradient-checkpointing)
- [Mixed Precision Training](https://vibeengines.com/glossary/mixed-precision)
- [Learning Rate Schedule](https://vibeengines.com/glossary/learning-rate-schedule)
- [Gradient Clipping](https://vibeengines.com/glossary/gradient-clipping)
- [Catastrophic Forgetting](https://vibeengines.com/glossary/catastrophic-forgetting)
- [Scaling Laws](https://vibeengines.com/glossary/scaling-laws)
- [Inference](https://vibeengines.com/glossary/inference)
- [Continuous Batching](https://vibeengines.com/glossary/continuous-batching)
- [PagedAttention](https://vibeengines.com/glossary/paged-attention)
- [RoPE (Rotary Position Embedding)](https://vibeengines.com/glossary/rope)
- [FlashAttention](https://vibeengines.com/glossary/flash-attention)
- [Layer Normalization](https://vibeengines.com/glossary/layer-normalization)
- [Residual Connection](https://vibeengines.com/glossary/residual-connection)
- [Model Parallelism](https://vibeengines.com/glossary/model-parallelism)
- [Red-Teaming](https://vibeengines.com/glossary/red-teaming)
- [Prompt Leaking](https://vibeengines.com/glossary/prompt-leaking)
- [Data Poisoning](https://vibeengines.com/glossary/data-poisoning)
- [Model Extraction](https://vibeengines.com/glossary/model-extraction)
- [PII Redaction](https://vibeengines.com/glossary/pii-redaction)
- [Differential Privacy](https://vibeengines.com/glossary/differential-privacy)
- [Zero-Trust Architecture](https://vibeengines.com/glossary/zero-trust-architecture)
- [Principle of Least Privilege](https://vibeengines.com/glossary/least-privilege)
- [RBAC (Role-Based Access Control)](https://vibeengines.com/glossary/rbac)
- [Secrets Management](https://vibeengines.com/glossary/secrets-management)
- [Service Mesh](https://vibeengines.com/glossary/service-mesh)
- [Sidecar Pattern](https://vibeengines.com/glossary/sidecar-pattern)
- [API Gateway](https://vibeengines.com/glossary/api-gateway)
- [Service Discovery](https://vibeengines.com/glossary/service-discovery)
- [Health Check](https://vibeengines.com/glossary/health-check)
- [Canary Release](https://vibeengines.com/glossary/canary-release)
- [Blue-Green Deployment](https://vibeengines.com/glossary/blue-green-deployment)
- [Chaos Engineering](https://vibeengines.com/glossary/chaos-engineering)
- [Distributed Tracing](https://vibeengines.com/glossary/distributed-tracing)
- [Thundering Herd](https://vibeengines.com/glossary/thundering-herd)
- [Load Shedding](https://vibeengines.com/glossary/load-shedding)
- [Load Balancer](https://vibeengines.com/glossary/load-balancer)
- [x402](https://vibeengines.com/glossary/x402)
- [AP2 (Agent Payments Protocol)](https://vibeengines.com/glossary/ap2)
- [Mandate](https://vibeengines.com/glossary/mandate)
- [Attribution Graph](https://vibeengines.com/glossary/attribution-graph)
- [Feature (SAE)](https://vibeengines.com/glossary/sae-feature)
- [Verifier](https://vibeengines.com/glossary/verifier)
- [Rollout](https://vibeengines.com/glossary/rollout)
- [Environment Hub](https://vibeengines.com/glossary/environment-hub)
- [Data Foundry](https://vibeengines.com/glossary/data-foundry)
- [Time Horizon (50%)](https://vibeengines.com/glossary/time-horizon)
- [Diffusion LLM](https://vibeengines.com/glossary/diffusion-llm)
- [Block Diffusion](https://vibeengines.com/glossary/block-diffusion)
- [Engram](https://vibeengines.com/glossary/engram)
- [Effort Level](https://vibeengines.com/glossary/effort-level)
- [Spec-Driven Development](https://vibeengines.com/glossary/spec-driven-development)
- [Agentic Browser](https://vibeengines.com/glossary/agentic-browser)
- [On-Policy Distillation](https://vibeengines.com/glossary/on-policy-distillation)
- [Query Fan-Out](https://vibeengines.com/glossary/query-fan-out)

## About
- [About Vibe Engines](https://vibeengines.com/about)
- [Open for AI — citation & attribution policy](https://vibeengines.com/open-for-ai)
- [Contact](https://vibeengines.com/contact)