https://teemupiirainen.com/blog Notes from building with AI in practice: production AI applications, agentic development systems and how the developer's work changes. en Thu, 15 Oct 2026 12:00:00 GMT https://teemupiirainen.com/blog/how-to-audit-claude-code-instructions-after-a-model-upgrade https://teemupiirainen.com/blog/how-to-audit-claude-code-instructions-after-a-model-upgrade Thu, 15 Oct 2026 12:00:00 GMT After moving to Opus 5.5, my Claude Code instructions went 22k → 13k tokens. Run the prompt audit, review with Claude, then test what you removed. ai claude agents workflow https://teemupiirainen.com/blog/claude-code-permissions-and-hooks-in-settings-json https://teemupiirainen.com/blog/claude-code-permissions-and-hooks-in-settings-json Sun, 11 Oct 2026 12:00:00 GMT "Never push without asking" belongs in settings.json, not only in the prompt. How to set up Claude Code permissions and hooks, with real examples. ai claude agents workflow https://teemupiirainen.com/blog/ai-code-review-is-statistical-why-one-run-is-not-enough https://teemupiirainen.com/blog/ai-code-review-is-statistical-why-one-run-is-not-enough Tue, 06 Oct 2026 12:00:00 GMT Run an AI code review twice on unchanged code and the findings can differ. How I'd design for it: repeated runs, fresh context, tracking what each adds. ai code-review agents workflow https://teemupiirainen.com/blog/graph-engineering-for-coding-agents-simple-first-workflow https://teemupiirainen.com/blog/graph-engineering-for-coding-agents-simple-first-workflow Sat, 03 Oct 2026 12:00:00 GMT Graph engineering for coding agents sounds complicated. A simple first workflow in Claude Code: draw it, write three agents and one SKILL.md. ai claude agents workflow https://teemupiirainen.com/blog/agent-marketplace-solves-distribution-not-adoption https://teemupiirainen.com/blog/agent-marketplace-solves-distribution-not-adoption Wed, 30 Sep 2026 12:00:00 GMT A marketplace ships agents and skills to every developer. It does not make anyone use them. Six questions I'd ask once the technical part works. ai agents adoption workflow https://teemupiirainen.com/blog/one-source-multiple-harnesses-building-a-portable-agent-marketplace https://teemupiirainen.com/blog/one-source-multiple-harnesses-building-a-portable-agent-marketplace Sun, 27 Sep 2026 12:00:00 GMT I run the same agents in Claude Code, Copilot CLI and Codex from one source. How the build adapts packages, hooks and roles, and what broke on the way. ai agents claude codex workflow https://teemupiirainen.com/blog/how-to-build-a-personal-agent-marketplace-for-claude-code https://teemupiirainen.com/blog/how-to-build-a-personal-agent-marketplace-for-claude-code Thu, 17 Sep 2026 12:00:00 GMT 40+ agents and skills, five plugins in every project. How I package them as a Claude Code plugin marketplace, with my aw-review reviewer as the example. ai claude agents workflow https://teemupiirainen.com/blog/what-a-software-factory-taught-me-about-ai-strategy-for-law-firms https://teemupiirainen.com/blog/what-a-software-factory-taught-me-about-ai-strategy-for-law-firms Wed, 09 Sep 2026 12:00:00 GMT I lived it in software: AI agents do the work and the advantage moves into the harness around the model. Now it is legal work. Nine AI strategy decisions. ai strategy legal adoption https://teemupiirainen.com/blog/if-ai-writes-and-reviews-the-code-what-is-the-human-approving https://teemupiirainen.com/blog/if-ai-writes-and-reviews-the-code-what-is-the-human-approving Wed, 12 Aug 2026 12:00:00 GMT AI agents write the code and independent AI code review gates it on evidence. What a PASS establishes about AI-generated code, and what a human approves. ai code-review codequality programming softwareengineering https://teemupiirainen.com/blog/ai-coaching-program-oma-saastopankki https://teemupiirainen.com/blog/ai-coaching-program-oma-saastopankki Thu, 23 Jul 2026 12:00:00 GMT A four-week AI Coaching Program at Oma Säästöpankki. The pilot lead reported 15–50% time savings; one regulatory task went from four hours to minutes. ai adoption finance risk-management compliance https://teemupiirainen.com/blog/ai-optimized-my-throughput-not-me https://teemupiirainen.com/blog/ai-optimized-my-throughput-not-me Wed, 22 Jul 2026 12:00:00 GMT My AI agents raised my output more than 10x, and my workdays got heavier, not lighter. AI brain fry, decision fatigue, and becoming the bottleneck. ai agents workflow https://teemupiirainen.com/blog/ai-took-my-job-twice-in-one-year https://teemupiirainen.com/blog/ai-took-my-job-twice-in-one-year Tue, 07 Jul 2026 12:00:00 GMT What a year of coding with AI did to my work, my role, and me. AI took over the writing, then the checking, and I had to relearn my role three times. ai learning https://teemupiirainen.com/blog/5-months-100-claude-code-zero-architectural-drift https://teemupiirainen.com/blog/5-months-100-claude-code-zero-architectural-drift Tue, 30 Jun 2026 12:00:00 GMT Every line of code in a five-month web service project was written by Claude Code. Here is the system that kept the architecture from drifting. ai claude architecture https://teemupiirainen.com/blog/ai-has-made-me-a-text-parser-and-im-terrible-at-that https://teemupiirainen.com/blog/ai-has-made-me-a-text-parser-and-im-terrible-at-that Tue, 02 Jun 2026 12:00:00 GMT Claude writes a ten-page spec in a minute. Reading it takes me two hours. The fix was giving the human a ViewModel instead of a database dump. ai agents claude https://teemupiirainen.com/blog/fomo-fomat-fomut-and-the-bottleneck-that-turned-out-to-be-me https://teemupiirainen.com/blog/fomo-fomat-fomut-and-the-bottleneck-that-turned-out-to-be-me Mon, 11 May 2026 12:00:00 GMT A year ago the AI agents were the bottleneck in my workflow. Now they run for hours unattended, and the bottleneck is me. Why that is a better problem. ai agents workflow https://teemupiirainen.com/blog/how-i-validate-quality-when-ai-agents-write-my-code https://teemupiirainen.com/blog/how-i-validate-quality-when-ai-agents-write-my-code Mon, 16 Mar 2026 12:00:00 GMT The eight-gate quality pipeline of tests, validator agents, reviews and deploy verification that turns AI-generated code into evidence. ai testing agents security https://teemupiirainen.com/blog/im-not-working-with-a-tool-anymore https://teemupiirainen.com/blog/im-not-working-with-a-tool-anymore Sun, 01 Mar 2026 12:00:00 GMT Eija Moisala asked me one question for her Ask a friend series: what have you been experimenting with, and what did it teach you? ai agents https://teemupiirainen.com/blog/your-ai-coding-agents-are-slow-because-your-tools-talk-too-much https://teemupiirainen.com/blog/your-ai-coding-agents-are-slow-because-your-tools-talk-too-much Sat, 07 Feb 2026 12:00:00 GMT A validator agent spent 6-9x longer reading test results than the tests took to run. The fix was not a better prompt. It was quieter tools. ai agents performance https://teemupiirainen.com/blog/half-a-year-with-the-nokia-team https://teemupiirainen.com/blog/half-a-year-with-the-nokia-team Thu, 20 Nov 2025 12:00:00 GMT Back in Oulu with the same Nokia team: four sessions across half a year, and the one question that shows whether training actually stuck. training teams https://teemupiirainen.com/blog/turning-ai-into-real-results-elisa https://teemupiirainen.com/blog/turning-ai-into-real-results-elisa Mon, 03 Nov 2025 12:00:00 GMT What Elisa and a team led by Eija Moisala got right about AI adoption: leadership, permission, and making learning part of everyday work, with results in weeks. ai training adoption https://teemupiirainen.com/blog/bringing-ai-to-everyday-work-ilmarinen https://teemupiirainen.com/blog/bringing-ai-to-everyday-work-ilmarinen Mon, 20 Oct 2025 12:00:00 GMT A recap of my talk at Ilmarinen on making AI a real teammate at work: moving past pilots, into everyday workflows, and a culture that keeps learning. ai training adoption https://teemupiirainen.com/blog/ai-training-from-pilot-to-practice https://teemupiirainen.com/blog/ai-training-from-pilot-to-practice Tue, 07 Oct 2025 12:00:00 GMT My Digiklinikka talk for the North Karelia Chamber of Commerce: why AI has to be guided, and how teams move it from small pilots to everyday practice. ai training adoption