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TacThe Agent Stack

A technical reference for Agentic AI. Learn how the stack fits together, or jump straight to the production problem you're solving.

Topics by Problem

Each topic answers a decision a builder actually faces.

Models and Economics

You're dealing with…Topic
Choosing a model family or providerFoundation Models
Unpredictable LLM costsTokens & Cost
Standard model failing on hard problemsReasoning Models
Need to choose between RAG and fine-tuningFine-Tuning
Need a smaller model to mimic a larger oneFine-Tuning

Serving and Performance

You're dealing with…Topic
Agent breaking at long contextContext Windows
Deciding between managed APIs and self-hostingLLM Serving
Wanting to cut input costs significantlyPrompt Caching
Inconsistent or unreliable outputsSampling
Response time too slowLatency
Rate limits hitting in productionRate Limits & Concurrency
Long context eating VRAMKV Cache & Quantization
Retrieval quality worse than expectedEmbeddings & Vector Stores
Wondering why MoE models are cheapMoE Architecture

Agents and Workflow

You're dealing with…Topic
Picking or building an agent frameworkAgent Frameworks
Deploying a ready-made autonomous agentAutonomous Agent Systems
Single agent not enoughOrchestration
Tools called incorrectly or unreliablyTool Use & Function Calling
Agent losing track in long conversationsContext Management

Quality and Safety

You're dealing with…Topic
Agent output quality is unpredictableEvaluations
Agent misbehaving on untrusted contentPrompt Injection & Security

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Released under the MIT License.