https://claude.dev/ Articles, videos, and build logs from Anthropic’s developers on building with Claude and Claude Code, including tips, tricks, and points of view. en Tue, 06 Oct 2026 12:00:00 GMT https://claude.dev/blog/claude-code-in-the-cloud/ https://claude.dev/blog/claude-code-in-the-cloud/ Tue, 06 Oct 2026 12:00:00 GMT Cloud sessions run Claude Code on a fresh VM for each task. Four real sessions, seven workflows that suit them, and how to connect GitHub without getting stuck. Addy Osmani Playbooks https://claude.dev/blog/getting-started-with-claude-code-mods/ https://claude.dev/blog/getting-started-with-claude-code-mods/ Thu, 01 Oct 2026 12:00:00 GMT Mods are hooks that ship inside plugins and run inside your Claude Code session. Build one from an empty folder, then tour two larger mods. Addy Osmani Tutorials https://claude.dev/blog/building-with-claude-sonnet-5-5/ https://claude.dev/blog/building-with-claude-sonnet-5-5/ Mon, 28 Sep 2026 12:00:00 GMT When to choose Sonnet over Opus, what it costs, and how to tune it. Addy Osmani Playbooks https://claude.dev/blog/automating-eval-design-and-hillclimbing/ https://claude.dev/blog/automating-eval-design-and-hillclimbing/ Mon, 28 Sep 2026 12:00:00 GMT Principles for designing evals and hillclimbing against them without fooling yourself, and how the claude-api skill's build-eval and hillclimb commands put them to work. Lance Martin Playbooks https://claude.dev/blog/what-a-task-costs-on-opus-5-5/ https://claude.dev/blog/what-a-task-costs-on-opus-5-5/ Fri, 25 Sep 2026 12:00:00 GMT The same token price can cost very different amounts per task. Learn what Claude Code tasks cost on Opus 5.5 and which settings change the bill. Addy Osmani Playbooks https://claude.dev/blog/spending-your-effort/ https://claude.dev/blog/spending-your-effort/ Fri, 25 Sep 2026 12:00:00 GMT What effort really is and when to use which level in Claude Code, from my own tests of three builds and a deep dive into Terminal-Bench 3.0 on Opus 5.5 and Fable 5.1. Thariq Shihipar Engineering https://claude.dev/blog/how-we-made-claude-ai-faster/ https://claude.dev/blog/how-we-made-claude-ai-faster/ Wed, 23 Sep 2026 12:00:00 GMT Inside our performance sprint: the benchmarks Claude built, the loop each Slack thread ran, and the guardrails that let us ship 3,000 changes safely. Raymond Wang, Sam Attard, and Issac G. Engineering https://claude.dev/blog/getting-the-most-out-of-opus-5-5/ https://claude.dev/blog/getting-the-most-out-of-opus-5-5/ Tue, 22 Sep 2026 12:00:00 GMT How to prompt Opus 5.5, steer a long run, and check your results in Claude apps and Claude Code. Addy Osmani Playbooks https://claude.dev/blog/the-new-rules-of-context-engineering-for-claude-5-generation-models/ https://claude.dev/blog/the-new-rules-of-context-engineering-for-claude-5-generation-models/ Fri, 24 Jul 2026 12:00:00 GMT We removed over 80% of Claude Code's system prompt for more advanced models. How to apply the lessons we learned to your own context engineering in Claude Code and with your own agents. Thariq Shihipar Engineering https://claude.dev/blog/lessons-from-building-claude-code-how-we-use-skills/ https://claude.dev/blog/lessons-from-building-claude-code-how-we-use-skills/ Wed, 03 Jun 2026 12:00:00 GMT What we learned building and scaling hundreds of skills internally at Anthropic. Thariq Shihipar Skills https://claude.dev/blog/a-harness-for-every-task-dynamic-workflows-in-claude-code/ https://claude.dev/blog/a-harness-for-every-task-dynamic-workflows-in-claude-code/ Tue, 02 Jun 2026 12:00:00 GMT Claude Code can now write and orchestrate its own multi-agent harness on the fly. Here's how dynamic workflows work, and the patterns that get the most out of them. Thariq Shihipar and Sid Bidasaria Agents https://claude.dev/blog/using-claude-code-the-unreasonable-effectiveness-of-html/ https://claude.dev/blog/using-claude-code-the-unreasonable-effectiveness-of-html/ Wed, 20 May 2026 12:00:00 GMT How and why members of the Claude Code team use HTML instead of Markdown to produce richer, more readable, and easily shareable outputs. Thariq Shihipar Playbooks https://claude.dev/blog/lessons-from-building-claude-code-prompt-caching-is-everything/ https://claude.dev/blog/lessons-from-building-claude-code-prompt-caching-is-everything/ Thu, 30 Apr 2026 12:00:00 GMT Best practices for optimizing prompt caching in Claude Code, including how to most effectively structure your prompt, use tools, and layer on compaction. Thariq Shihipar Engineering https://claude.dev/blog/seeing-like-an-agent/ https://claude.dev/blog/seeing-like-an-agent/ Fri, 10 Apr 2026 12:00:00 GMT Learn how the Claude Code team designs, tests, and evolves tools by thinking from the model's point of view. Thariq Shihipar Agents