LLMs in practice: essence, reviews, opinions, subtleties and unusual applications. Every post ships a working artifact.https://opopa.top/en-UShttps://opopa.top/en/posts/security-wall-breaks-flow/https://opopa.top/en/posts/security-wall-breaks-flow/Why Western models are losing to Chinese ones: regulation breaks the flow state, and the filters get bypassed anyway.Mon, 28 Sep 2026 00:00:00 GMTfield-reportsagentshttps://opopa.top/en/posts/model-lies-contractor-leaves/https://opopa.top/en/posts/model-lies-contractor-leaves/The model lies to us — we stop trusting each other. How not to lose a partner because of forwarded LLM output.Tue, 22 Sep 2026 00:00:00 GMTfield-reportsagentshttps://opopa.top/en/posts/accepting-agent-work-with-live-tests/https://opopa.top/en/posts/accepting-agent-work-with-live-tests/A real backend, observable effects, one build and an independent rerun: how to accept an agent's work. Includes an acceptance checklist.Tue, 15 Sep 2026 00:00:00 GMTengineeringagentshttps://opopa.top/en/posts/from-browser-tests-to-real-devices/https://opopa.top/en/posts/from-browser-tests-to-real-devices/The agent says "tests are green", and the bug is still there. How agents lied to me with mocks and tests, why I switched to live tests, and what it cost.Tue, 15 Sep 2026 00:00:00 GMTengineeringinfrastructurehttps://opopa.top/en/posts/design-md-as-an-input-artifact/https://opopa.top/en/posts/design-md-as-an-input-artifact/Why “make it look good” is a poor brief for any model, and what to provide instead: the design workflow behind the blog you are reading.Mon, 14 Sep 2026 00:00:00 GMTengineeringdesignhttps://opopa.top/en/posts/og-images-from-design-tokens/https://opopa.top/en/posts/og-images-from-design-tokens/Build social cards from your design system's colors and fonts, without Chrome in CI or broken Cyrillic. Includes the generator and font scripts.Sun, 13 Sep 2026 00:00:00 GMTtoolsdesign