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AI field notes

AI guides: what to build, what it costs, how it ships.

This is Resourcifi's library of AI guides: field notes on building agents, RAG systems and copilots, getting them through production, and understanding what they actually cost to run. Every article comes from client work, written by the engineers who ship it, not a content team paraphrasing press releases. Start with the agent and RAG build guides if you are deciding what to build. Read the deployment checklist and evaluation guides before anything touches real users. The cost and use case articles cover what budget holders ask first: what this costs over time and where it pays off in your industry. Everything here follows our Production-First AI methodology, which treats shipping as the starting line, not the finish. No trend pieces, no recycled hot takes, just what worked and what broke.

48 guides Updated as we publish Written by the team that ships the work
AI Architecture Patterns Strategy, architecture & ops

AI Architecture Patterns

Agentic design patterns explained: reflection, tool use, planning, and multi-agent collaboration, with a framework to pic...

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AI Cost Optimization Strategy, architecture & ops

AI Cost Optimization

A senior-engineer guide to AI cost optimization: where LLM spend comes from, the levers ranked by payoff, the five number...

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AI Evaluation and Evals Strategy, architecture & ops

AI Evaluation and Evals

LLM evaluation and AI evals, explained: the eval taxonomy, how to build an eval suite, LLM-as-a-judge bias, offline vs pr...

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AI Features SaaS Customers Actually Want Strategy, architecture & ops

AI Features SaaS Customers Actually Want

What AI powered SaaS customers actually want: the time-savers and answers they value, the automation they distrust, and h...

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AI for Compliance Use cases & function

AI for Compliance

AI for compliance with evidence as a build deliverable: SR 11-7, EU AI Act conformance, ISO 27001, SOC 2, NIST AI RMF, an...

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AI for Customer Service Use cases & function

AI for Customer Service

The real benefits of AI in customer service: 30% to 60% tier-one deflection, the CSAT points at risk, a refund-capped aut...

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AI for Knowledge Management Use cases & function

AI for Knowledge Management

AI for knowledge management with permission-aware RAG over Slack, Confluence, Notion, and SharePoint, plus SSO and faithf...

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AI for Operations Use cases & function

AI for Operations

AI in operations management, the buyer guide: six back-office patterns that ship, the RPA plus AI hybrid into SAP and Ser...

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AI for Sales Use cases & function

AI for Sales

How to use AI in sales: five patterns that reach production, deliverability guardrails, a send-volume cap, and honest ROI...

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AI Security Best Practices Strategy, architecture & ops

AI Security Best Practices

Generative AI security best practices: the OWASP Top 10 for LLMs, NIST AI RMF, MITRE ATLAS, lifecycle controls, agentic-A...

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AI Use Cases in Construction Use cases & function

AI Use Cases in Construction

How to use AI in construction in 2026: the use cases that actually ship by function, real adoption rates, the data-qualit...

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AI Use Cases in Ecommerce Use cases & function

AI Use Cases in Ecommerce

AI use cases in ecommerce by function: personalization, search, support, and forecasting, plus the honest read on adoptio...

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AI Use Cases in Fintech Use cases & function

AI Use Cases in Fintech

Generative AI in fintech, what actually ships: the use cases by function, real adoption data, where the value sits, and t...

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AI Use Cases in Healthcare Use cases & function

AI Use Cases in Healthcare

AI in healthcare examples that ship in 2026: ambient scribes, imaging, triage. Half of organizations now run generative A...

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AI Use Cases in Legal Use cases & function

AI Use Cases in Legal

AI in the legal industry by use case: the highest-adoption tasks, verified 2025 adoption data, the accuracy and ABA compl...

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AI Use Cases in Real Estate Use cases & function

AI Use Cases in Real Estate

How AI is changing real estate in the USA in 2026: the real production use cases by function, 2025 adoption data, the AVM...

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AI Use Cases in SaaS: What to Build Use cases & function

AI Use Cases in SaaS: What to Build

AI in SaaS: use cases by product and operations function, what each delivers, the build reality with multi-tenant isolati...

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Build vs Buy AI: A Decision Framework Strategy, architecture & ops

Build vs Buy AI: A Decision Framework

Build vs buy AI is a layering decision, not a binary. The real tradeoffs across data, control, TCO and lock-in, a decisio...

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Fine-Tuning vs RAG Strategy, architecture & ops

Fine-Tuning vs RAG

RAG vs fine-tuning explained: RAG handles knowledge and freshness; fine-tuning shapes behavior. Decision framework, cost...

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How to Build a Domain-Specific LLM Building AI

How to Build a Domain-Specific LLM

How to build a domain-specific LLM: RAG for facts, LoRA fine-tuning for behavior. Practical guide with compute costs from...

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How to Build a RAG System Building AI

How to Build a RAG System

Learn how to implement RAG with a seven-stage pipeline guide covering chunking, embeddings, retrieval, and evaluation. Bu...

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How to Build an AI Agent Agents & RAG

How to Build an AI Agent

Learn how to build an AI agent in 2026: the agent loop, tools, frameworks, and a step-by-step build path. Built by 200+ e...

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How to Build an AI Copilot Building AI

How to Build an AI Copilot

Learn how to make an AI assistant: eight steps covering RAG, tool calling, guardrails, evals, and telemetry, backed by Mi...

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How to Build an AI SaaS Product Building AI

How to Build an AI SaaS Product

How to build a SaaS product with AI: the 5-phase build path, stack, margin reality, and pricing models. Trusted by 200+ e...

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How to Train a Custom Model Building AI

How to Train a Custom Model

How to train an AI model: when to train vs. use an API, the 7-stage workflow, classical ML vs LLM fine-tuning, and the pi...

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LLM Comparison Guide 2026 Strategy, architecture & ops

LLM Comparison Guide 2026

An AI model comparison guide: how to choose between GPT, Claude, Gemini, and open-weight models using the 8 dimensions th...

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Prompt Engineering Guide Building AI

Prompt Engineering Guide

What is prompt engineering? A practitioner guide: core techniques from few-shot to chain-of-thought, guardrails, and 2026...

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What is RPA Strategy, architecture & ops

What is RPA

Learn what RPA (robotic process automation) is, how bots work, common use cases, and how intelligent automation pairs RPA...

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