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AI

  • What Is an Agent, Really?
  • Models From First Principles 08: Preference Rankers — Learning Which Answer Is Better
  • Build a Production AI Agent From First Principles: The Complete Reference Architecture
  • Advanced Agents From First Principles 24: How Do You Release Agent Behavior Safely? Add Behavioral Contracts, Compatibility Checks and Promotion Gates
  • Advanced Agents From First Principles 23: Your Infrastructure Is Healthy. Why Is the Agent Getting Worse? Detect Behavioral Drift and Roll Back Safely
  • Advanced Agents From First Principles 22: What Happens When One Dependency Starts Failing? Add Circuit Breakers, Bulkheads and Graceful Degradation
  • Advanced Agents From First Principles 21: What Happens When Too Many Agents Compete for the Same Resources? Add Admission Control, Quotas and Backpressure
  • Advanced Agents From First Principles 20: Can Your Agent Coordinate Across Machines Without Duplicating Work? Use Leases, Idempotency and Fencing
  • Advanced Agents From First Principles 18: What Should Your Agent Observe Next? Use Expected Value of Information
  • Advanced Agents From First Principles 17: What Is Your Agent Actually Uncertain About?
  • Advanced Agents From First Principles 16: Where Should an Agent Spend Its Compute? Build a Dynamic Budget Scheduler
  • Advanced Agents From First Principles 15: How Do You Optimize an Agent Policy Without Turning It Into Another Black Box?
  • Advanced Agents From First Principles 14: Can Your Agent Learn From Its Own Trajectories Without Learning the Wrong Lessons?
  • Advanced Agents From First Principles 13: How Do You Debug an Agent That Made the Wrong Decision? Add Trajectory Observability
  • Advanced Agents From First Principles 12: Is Your Advanced Agent Actually Better? Benchmark It Under Equal Budgets
  • Advanced Agents From First Principles 11: Which Advanced Agent Architecture Should You Use? A Practical Selection Guide
  • Advanced Agents From First Principles 08: Is Your Agent Spending the Same Compute on Every Task? Build Adaptive Agents That Escalate Only When Needed
  • Advanced Agents From First Principles 25: Can You Reproduce an Agent Run Months Later? Add Deterministic Replay and Provenance
  • Advanced Agents From First Principles 10: Are You Combining Every Agent Technique Into One Monster? Build a Mixture-of-Agents Runtime
  • Advanced Agents From First Principles 09: Can Your Agent Actually Learn From Previous Runs?
  • Models From First Principles 08: Which Model Should You Use? MR.Q, EBT, SICQL, HRM, Tiny and PACS Compared
  • Models From First Principles 06: Inside Tiny — Residual Blocks, Attention and Sparse Autoencoders
  • Models From First Principles 05: Tiny — Recursive Reasoning With a Small Neural Network
  • Models From First Principles 01: MR.Q — Building a Neural Quality Model From Two Embeddings
  • Models From First Principles 00: The Model Inside the Model
  • 10: Build a Small GPT-Style Language Model From Scratch
  • PyTorch Model Not Learning? A Systematic Debugging Guide
  • 00: What Are We Actually Doing?
  • 🔦 Phōs: Visualizing How AI Learns and How to Build It Yourself
  • Writing Neural Networks with PyTorch
  • Mastering Prompt Engineering: A Practical Guide
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© 2026 Ernan Hughes
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