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| FeaturedHow we contain Claude across productsAs agents grow more capable, so does their potential blast radius. The engineering question is how to cap it. Here’s what we’ve learned building containment for claude.ai, Claude Code, and Cowork.
| https://anthropic.com/engineering/how-we-contain-claude |
| An update on recent Claude Code quality reportsApr 23, 2026 | https://anthropic.com/engineering/april-23-postmortem |
| Scaling Managed Agents: Decoupling the brain from the handsApr 08, 2026 | https://anthropic.com/engineering/managed-agents |
| How we built Claude Code auto mode: a safer way to skip permissionsMar 25, 2026 | https://anthropic.com/engineering/claude-code-auto-mode |
| Harness design for long-running application developmentMar 24, 2026 | https://anthropic.com/engineering/harness-design-long-running-apps |
| Eval awareness in Claude Opus 4.6’s BrowseComp performanceMar 06, 2026 | https://anthropic.com/engineering/eval-awareness-browsecomp |
| Quantifying infrastructure noise in agentic coding evalsFeb 05, 2026 | https://anthropic.com/engineering/infrastructure-noise |
| Building a C compiler with a team of parallel ClaudesFeb 05, 2026 | https://anthropic.com/engineering/building-c-compiler |
| Designing AI-resistant technical evaluationsJan 21, 2026 | https://anthropic.com/engineering/AI-resistant-technical-evaluations |
| Demystifying evals for AI agentsJan 09, 2026 | https://anthropic.com/engineering/demystifying-evals-for-ai-agents |
| Effective harnesses for long-running agentsNov 26, 2025 | https://anthropic.com/engineering/effective-harnesses-for-long-running-agents |
| Introducing advanced tool use on the Claude Developer PlatformNov 24, 2025 | https://anthropic.com/engineering/advanced-tool-use |
| Code execution with MCP: Building more efficient agentsNov 04, 2025 | https://anthropic.com/engineering/code-execution-with-mcp |
| Beyond permission prompts: making Claude Code more secure and autonomousOct 20, 2025 | https://anthropic.com/engineering/claude-code-sandboxing |
| Equipping agents for the real world with Agent SkillsOct 16, 2025 | https://anthropic.com/engineering/equipping-agents-for-the-real-world-with-agent-skills |
| Effective context engineering for AI agentsSep 29, 2025 | https://anthropic.com/engineering/effective-context-engineering-for-ai-agents |
| A postmortem of three recent issuesSep 17, 2025 | https://anthropic.com/engineering/a-postmortem-of-three-recent-issues |
| Writing effective tools for agents — with agentsSep 11, 2025 | https://anthropic.com/engineering/writing-tools-for-agents |
| Desktop Extensions: One-click MCP server installation for Claude DesktopJun 26, 2025 | https://anthropic.com/engineering/desktop-extensions |
| How we built our multi-agent research systemJun 13, 2025 | https://anthropic.com/engineering/multi-agent-research-system |
| Claude Code: Best practices for agentic codingApr 18, 2025 | https://anthropic.com/engineering/claude-code-best-practices |
| The "think" tool: Enabling Claude to stop and think in complex tool use situationsMar 20, 2025 | https://anthropic.com/engineering/claude-think-tool |
| Raising the bar on SWE-bench Verified with Claude 3.5 SonnetJan 06, 2025 | https://anthropic.com/engineering/swe-bench-sonnet |
| Building effective agentsDec 19, 2024 | https://anthropic.com/engineering/building-effective-agents |
| Introducing Contextual RetrievalSep 19, 2024 | https://anthropic.com/engineering/contextual-retrieval |
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