--- title: "Blog // Field Notes, Page 3 · FoundrySoft" description: "Engineering notes from senior practitioners on generative AI, retrieval systems, and the real work of shipping LLM-powered software to production." image: "https://foundrysoft.co/api/og?type=page&title=Engineering+intelligent+software&st=Production-grade+software+and+AI+systems+for+teams+who+need+more+than+another+demo." url: "https://foundrysoft.co/blog/page/3" --- Field Notes, 127 Articles # Notes from the foundry Engineering essays on generative AI, retrieval systems, and what it takes to ship intelligent software to production. [41 Insights // Business Strategy How Much Does It Cost to Build a Custom AI Agent in 2026? 2026-07-20 →](https://foundrysoft.co/blog/cost-to-build-custom-ai-agent) [42 Insights // Development Cursor AI vs GitHub Copilot: The Ultimate Guide for Agentic Coding 2026-07-20 →](https://foundrysoft.co/blog/cursor-ai-vs-github-copilot) [43 Insights // Business Strategy Custom AI Development vs. Buying Off-The-Shelf SaaS Platforms 2026-07-20 →](https://foundrysoft.co/blog/custom-ai-development-vs-saas) [44 Insights // Technology Escaping LLM Vendor Lock-in: Migrating to Open-Source Models 2026-07-20 →](https://foundrysoft.co/blog/escaping-llm-vendor-lock-in) [45 Insights // Business Strategy The Hidden Costs of AI Implementation (And How to Avoid Them) 2026-07-20 →](https://foundrysoft.co/blog/hidden-costs-of-ai-implementation) [46 Insights // Healthcare Building HIPAA-Compliant AI Agents for Healthcare Workflows 2026-07-20 →](https://foundrysoft.co/blog/hipaa-compliant-ai-agents-healthcare) [47 Insights // Hiring Hire AI Agent Developers: A Guide for Enterprise CTOs 2026-07-20 →](https://foundrysoft.co/blog/hire-ai-agent-developers-enterprise) [48 Insights // Technology Why Your RAG Pipeline is Failing (And How to Fix It) 2026-07-20 →](https://foundrysoft.co/blog/why-your-rag-pipeline-is-failing) [49 Comparisons Grok 4.5 vs Muse Spark 1.1: An Independent Comparison After Ten Days in Production 2026-07-19 →](https://foundrysoft.co/blog/grok-4-5-vs-muse-spark-1-1-comparison) [50 Tutorial // AIOps Building a Durable AIOps On-Call Agent with Eve.dev 2026-07-18 →](https://foundrysoft.co/blog/eve-dev-durable-aiops-oncall-agent) [51 Tutorial // Finance Multi-Agent Orchestration in Eve.dev: An Autonomous Accounts-Payable Pipeline 2026-07-18 →](https://foundrysoft.co/blog/eve-dev-multi-agent-accounts-payable) [52 Use Cases // Business The Ultimate Research Assistant: Processing 100-Page Contracts with Kimi K3 2026-07-17 →](https://foundrysoft.co/blog/kimi-k3-document-analysis) [53 Use Cases // Coding Mastering Large Codebases: How Kimi K3 Transforms Legacy Code Refactoring 2026-07-17 →](https://foundrysoft.co/blog/kimi-k3-legacy-code-refactoring) [54 Use Cases // Healthcare Decoding Biology: How Kimi K3 is Accelerating Medical Diagnostics and Genomic Research 2026-07-17 →](https://foundrysoft.co/blog/kimi-k3-medical-diagnostics-genomics) [55 Use Cases // Marketing From Video to Insights: Deep Reasoning with Kimi K3's Native Multimodal Engine 2026-07-17 →](https://foundrysoft.co/blog/kimi-k3-multimodal-video-analysis) [56 Use Cases // Finance Revolutionizing Quantitative Finance: Kimi K3 as the Ultimate Algorithmic Trading Architect 2026-07-17 →](https://foundrysoft.co/blog/kimi-k3-quantitative-finance-trading) [57 Comparisons Claude Fable 5 vs Kimi K3: Choosing the Right Frontier AI for Enterprise Workflows 2026-07-17 →](https://foundrysoft.co/blog/kimi-k3-vs-claude-fable-5-comparison) [58 Comparisons Kimi K3 vs GPT-5.6 Sol: The Battle for Long-Context Reasoning in 2026 2026-07-17 →](https://foundrysoft.co/blog/kimi-k3-vs-gpt-5-6-sol-comparison) [59 Tutorial // Infrastructure Running AI-Generated Code at the Edge with Cloudflare Sandboxes 2026-07-16 →](https://foundrysoft.co/blog/cloudflare-sandboxes-ai-code-execution) [60 Tutorial // Security Hardening an AI Code Sandbox: Seccomp, Egress Firewalls, and gVisor 2026-07-16 →](https://foundrysoft.co/blog/hardening-ai-code-sandbox-security) [‹ Prev](https://foundrysoft.co/blog/page/2) [1](https://foundrysoft.co/blog) [2](https://foundrysoft.co/blog/page/2) 3 [4](https://foundrysoft.co/blog/page/4) [5](https://foundrysoft.co/blog/page/5) [6](https://foundrysoft.co/blog/page/6) [7](https://foundrysoft.co/blog/page/7) [Next ›](https://foundrysoft.co/blog/page/4) ```json { "@context": "https://schema.org", "@type": "Organization", "name": "FoundrySoft", "url": "https://foundrysoft.co", "logo": "https://foundrysoft.co/logo.svg", "description": "FoundrySoft builds production-grade software and AI systems for US companies, from an India-based team of senior engineers.", "sameAs": [ "https://github.com/foundrysofthq", "https://www.linkedin.com/company/foundrysoft", "https://www.instagram.com/foundrysoft/" ] } ``` ```json { "@context": "https://schema.org", "@type": "WebSite", "name": "FoundrySoft", "url": "https://foundrysoft.co" } ``` ```json { "@context": "https://schema.org", "@type": "Blog", "name": "FoundrySoft Blog", "url": "https://foundrysoft.co/blog/page/3", "blogPost": [ { "@type": "BlogPosting", "headline": "How Much Does It Cost to Build a Custom AI Agent in 2026?", "url": "https://foundrysoft.co/blog/cost-to-build-custom-ai-agent", "datePublished": "2026-07-20" }, { "@type": "BlogPosting", "headline": "Cursor AI vs GitHub Copilot: The Ultimate Guide for Agentic Coding", "url": "https://foundrysoft.co/blog/cursor-ai-vs-github-copilot", "datePublished": "2026-07-20" }, { "@type": "BlogPosting", "headline": "Custom AI Development vs. Buying Off-The-Shelf SaaS 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