Anthropic engineer details internal Claude Code loop

// 2h agoTUTORIAL

Anthropic engineer details internal Claude Code loop

Anthropic engineer Thariq Shihipar details the "Prompt, Plan, Verify" loop used internally to build Claude Code. The workflow replaces traditional autocomplete with an agentic cycle of architectural planning and empirical verification.

// ANALYSIS

The "Prompt, Plan, Verify" loop marks the maturation of AI coding from simple prompting to rigorous, verifiable engineering.

–Plan Mode forces architectural thinking and dependency analysis before any code is written
–HTML artifacts replace Markdown for interactive implementation plans and "throwaway" micro-UIs
–Engineers act as "compute allocators," spending 90% of their time on planning and communication
–Integration with Playwright and MCP allows for autonomous, end-to-end verification of features
–"Living design systems" ensure visual consistency by giving the agent a ground-truth UI reference

// TAGS

claude-codeai-codingcoding-agentagentmcpdevtoolprompt-engineeringtool-use

DISCOVERED

2h ago

2026-05-23

PUBLISHED

2h ago

2026-05-23

RELEVANCE

9/ 10

AUTHOR

Av1dlive

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