--- title: "Blog // Field Notes, Page 2 · 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/2" --- 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. [21 AI Engineering Grok 4.5 API Review: Pricing, Performance, and When to Use It Instead of Claude 2026-07-25 →](https://foundrysoft.co/blog/grok-4-5-agent-stack-opus-class-pricing) [22 AI Engineering Grok Voice API Tutorial: How to Build a Realtime AI Voice Agent for Customer Support 2026-07-25 →](https://foundrysoft.co/blog/grok-voice-agent-api-realtime-build) [23 AI Engineering How to Build a Multilingual AI Voice Agent with Grok Voice: Hindi, Spanish, and 20+ Languages 2026-07-25 →](https://foundrysoft.co/blog/grok-voice-multilingual-support-agent) [24 AI Engineering How to Connect an AI Voice Agent to a Real Phone Number: Grok Voice SIP Setup and Cost Breakdown 2026-07-25 →](https://foundrysoft.co/blog/grok-voice-sip-after-hours-phone-agent) [25 AI Engineering Meta Model API Tutorial: How to Get Started with Muse Spark 1.1 (Pricing, Setup, First Agent) 2026-07-25 →](https://foundrysoft.co/blog/meta-model-api-muse-spark-getting-started) [26 AI Engineering How to Migrate to the Claude Opus 5 API: Breaking Changes, 400 Errors, and a Production Checklist 2026-07-25 →](https://foundrysoft.co/blog/migrating-production-agents-to-claude-opus-5) [27 AI Engineering How to Build a Computer Use Agent with Muse Spark 1.1: Cross-Application Workflows That Actually Finish 2026-07-25 →](https://foundrysoft.co/blog/muse-spark-computer-use-agent-cross-application) [28 AI Engineering Multi-Agent Orchestration with Muse Spark 1.1: How Subagent Delegation Actually Works in Production 2026-07-25 →](https://foundrysoft.co/blog/muse-spark-multi-agent-subagent-delegation) [29 AI Engineering Context Engineering for AI Agents: Managing the Context Window in Production 2026-07-24 →](https://foundrysoft.co/blog/context-engineering-ai-agents-production) [30 AI Engineering How to Evaluate a New LLM in 48 Hours: The Shadow-Mode Playbook 2026-07-23 →](https://foundrysoft.co/blog/evaluate-new-llm-48-hours-shadow-mode) [31 Tutorial // Agents We Open-Sourced an AI Agent That Catches the Markup/Margin Error Costing Contractors Money 2026-07-23 →](https://foundrysoft.co/blog/open-source-ai-agent-contractor-quoting-margin) [32 Insights // Technology How to Automate a Legacy System That Has No API (Without Waiting for IT) 2026-07-22 →](https://foundrysoft.co/blog/automate-legacy-systems-without-api-computer-use) [33 Tutorial // Agents We Open-Sourced an AI Agent That Vets Freight Carriers Against FMCSA 2026-07-21 →](https://foundrysoft.co/blog/open-source-ai-agent-freight-broker-carrier-vetting) [34 AI Engineering Teaching an Agent Our Client Reporting Playbook with Vercel AI SDK v7 Skills 2026-07-21 →](https://foundrysoft.co/blog/vercel-ai-sdk-v7-agent-skills) [35 Insights // Technology AI Agent Development vs Chatbot Development: What You Need to Know 2026-07-20 →](https://foundrysoft.co/blog/ai-agent-vs-chatbot-development) [36 Insights // Hiring Hiring an AI Automation Agency vs. Building an In-House AI Team 2026-07-20 →](https://foundrysoft.co/blog/ai-automation-agency-vs-in-house) [37 Insights // Development Antigravity IDE: The Next Evolution of Autonomous Coding 2026-07-20 →](https://foundrysoft.co/blog/antigravity-ide-autonomous-coding) [38 Insights // FinTech How Financial Services Firms Are Using Autonomous Agents 2026-07-20 →](https://foundrysoft.co/blog/autonomous-agents-financial-services) [39 Insights // Technology Building AI Agents with Grok: Exploring the xAI API Developer Platform 2026-07-20 →](https://foundrysoft.co/blog/building-ai-agents-with-grok-xai-api) [40 Insights // Development Claude Code CLI Hacks: Pro Tips for Agentic Development 2026-07-20 →](https://foundrysoft.co/blog/claude-code-cli-hacks-tips) [‹ Prev](https://foundrysoft.co/blog) [1](https://foundrysoft.co/blog) 2 [3](https://foundrysoft.co/blog/page/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/3) ```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/2", "blogPost": [ { "@type": "BlogPosting", "headline": "Grok 4.5 API Review: Pricing, Performance, and When to Use It Instead of Claude", "url": "https://foundrysoft.co/blog/grok-4-5-agent-stack-opus-class-pricing", "datePublished": "2026-07-25" }, { "@type": "BlogPosting", "headline": "Grok Voice API Tutorial: How to Build a Realtime AI Voice Agent for Customer Support", "url": "https://foundrysoft.co/blog/grok-voice-agent-api-realtime-build", "datePublished": "2026-07-25" }, { "@type": "BlogPosting", "headline": "How to Build a Multilingual AI Voice Agent with Grok Voice: Hindi, Spanish, and 20+ Languages", "url": "https://foundrysoft.co/blog/grok-voice-multilingual-support-agent", "datePublished": "2026-07-25" }, { "@type": "BlogPosting", "headline": "How to Connect an AI Voice Agent to a Real Phone Number: Grok Voice SIP Setup and Cost Breakdown", "url": "https://foundrysoft.co/blog/grok-voice-sip-after-hours-phone-agent", "datePublished": "2026-07-25" }, { "@type": "BlogPosting", "headline": "Meta Model API Tutorial: How to Get Started with Muse Spark 1.1 (Pricing, Setup, First Agent)", "url": "https://foundrysoft.co/blog/meta-model-api-muse-spark-getting-started", "datePublished": "2026-07-25" }, { "@type": "BlogPosting", "headline": "How to Migrate to the Claude Opus 5 API: Breaking Changes, 400 Errors, and a Production Checklist", "url": "https://foundrysoft.co/blog/migrating-production-agents-to-claude-opus-5", "datePublished": "2026-07-25" }, { "@type": "BlogPosting", "headline": "How to Build a Computer Use Agent with Muse Spark 1.1: Cross-Application Workflows That Actually Finish", "url": "https://foundrysoft.co/blog/muse-spark-computer-use-agent-cross-application", "datePublished": "2026-07-25" }, { "@type": "BlogPosting", "headline": "Multi-Agent Orchestration with Muse Spark 1.1: How Subagent Delegation Actually Works in Production", "url": "https://foundrysoft.co/blog/muse-spark-multi-agent-subagent-delegation", "datePublished": "2026-07-25" }, { "@type": "BlogPosting", "headline": "Context Engineering for AI Agents: Managing the Context Window in Production", "url": "https://foundrysoft.co/blog/context-engineering-ai-agents-production", "datePublished": "2026-07-24" }, { "@type": "BlogPosting", "headline": "How to Evaluate a New LLM in 48 Hours: The Shadow-Mode Playbook", "url": "https://foundrysoft.co/blog/evaluate-new-llm-48-hours-shadow-mode", "datePublished": "2026-07-23" }, { "@type": "BlogPosting", "headline": "We Open-Sourced an AI Agent That Catches the Markup/Margin Error Costing Contractors Money", "url": "https://foundrysoft.co/blog/open-source-ai-agent-contractor-quoting-margin", "datePublished": "2026-07-23" }, { "@type": "BlogPosting", "headline": "How to Automate a Legacy System That Has No API (Without Waiting for IT)", "url": "https://foundrysoft.co/blog/automate-legacy-systems-without-api-computer-use", "datePublished": "2026-07-22" }, { "@type": "BlogPosting", "headline": "We Open-Sourced an AI Agent That Vets Freight Carriers Against FMCSA", "url": "https://foundrysoft.co/blog/open-source-ai-agent-freight-broker-carrier-vetting", "datePublished": "2026-07-21" }, { "@type": "BlogPosting", "headline": "Teaching an Agent Our Client Reporting Playbook with Vercel AI SDK v7 Skills", "url": "https://foundrysoft.co/blog/vercel-ai-sdk-v7-agent-skills", "datePublished": "2026-07-21" }, { "@type": "BlogPosting", "headline": "AI Agent Development vs Chatbot Development: What You Need to Know", "url": "https://foundrysoft.co/blog/ai-agent-vs-chatbot-development", "datePublished": "2026-07-20" }, { "@type": "BlogPosting", "headline": "Hiring an AI Automation Agency vs. Building an In-House AI Team", "url": "https://foundrysoft.co/blog/ai-automation-agency-vs-in-house", "datePublished": "2026-07-20" }, { "@type": "BlogPosting", "headline": "Antigravity IDE: The Next Evolution of Autonomous Coding", "url": "https://foundrysoft.co/blog/antigravity-ide-autonomous-coding", "datePublished": "2026-07-20" }, { "@type": "BlogPosting", "headline": "How Financial Services Firms Are Using Autonomous Agents", "url": "https://foundrysoft.co/blog/autonomous-agents-financial-services", "datePublished": "2026-07-20" }, { "@type": "BlogPosting", 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