Feel Flow Inc. / BlogEngineering and AI insights from Feel Flow — on AI Spec-Driven Development and building with AI.https://feelflow.net/enWho Decides What, and How Does AI Execute? — Reading the Division of Labor from Anthropic's Claude Code Analysishttps://feelflow.net/en/blog/2026-06-anthropic-claude-code-human-ai-division/https://feelflow.net/en/blog/2026-06-anthropic-claude-code-human-ai-division/Anthropic's Claude Code usage analysis reveals a division of labor: humans set the goal, constraints, and definition of done; AI handles exploration, editing, and execution. From official data on ~400,000 sessions, here's what engineers should hold onto in the AI era.Wed, 24 Jun 2026 13:02:18 GMTClaude CodeAnthropicAI AgentsAI Spec-Driven DevelopmentAI CodingDevelopment ProcessClaude Code in Large Codebases: Best Practices and Where to Beginhttps://feelflow.net/en/blog/2026-05-claude-code-large-codebases-best-practices/https://feelflow.net/en/blog/2026-05-claude-code-large-codebases-best-practices/Anthropic's guide to running Claude Code in large codebases is a practical starting point for organizations adopting AI coding at scale. We break down Agentic Search, the harness around the model (CLAUDE.md, Hooks, Skills, Plugins, MCP, LSP, Subagents), three design patterns, and where to begin.Tue, 19 May 2026 00:00:00 GMTClaude CodeAnthropicAI AgentsAI CodingLarge CodebasesContext EngineeringCLAUDE.mdMCPLSPSubagentsBest PracticesGenerative AIWhy AI Spec-Driven Development Was Born — Its Originator on the Origin and the Road to Proofhttps://feelflow.net/en/blog/2026-05-why-ai-spec-driven-was-born/https://feelflow.net/en/blog/2026-05-why-ai-spec-driven-was-born/I used to think 'letting AI build software is impossible.' Feel Flow CTO Futoshi Okazaki looks back on why he changed his mind — the origin of AI Spec-Driven Development and the numbers that proved it out on our own SaaS.Mon, 18 May 2026 00:00:00 GMTAI Spec-Driven DevelopmentAI DevelopmentAI CodingAI AgentsMethodologySoftware DevelopmentContext EngineeringThe Development Revolution of the AI Era: Why Documentation Is Better When There's Less of Ithttps://feelflow.net/en/blog/2025-07-ai-driven-design/https://feelflow.net/en/blog/2025-07-ai-driven-design/In 2025, software development has hit a major turning point. With AI tools generating most of the code, why does the old, human-centric documentation system quietly sabotage efficiency — and what does an AI-optimized structure look like?Mon, 28 Jul 2025 00:00:00 GMTAI DevelopmentDocumentationAI Spec-Driven DevelopmentContext Engineering