Clean Code in the age of coding agents

Author: yanist.com (unattributed) Date: April 2026 Source: https://www.yanist.com/clean-code-in-the-age-of-coding-agents/

Summary

Short post arguing that code quality matters more, not less, when working with coding agents. LLMs have context windows analogous to human cognitive load — messy code forces agents to read more files than necessary, polluting context and wasting tokens. Structure is no longer just for human readers; it's for machine readers too.

Key points

• References Robert Martin's Clean Architecture distinction between code's value (functionality, performance) and structure (organization). Value is immediately visible; poor structure is a slow-moving cost.
• Clean code characteristics: readable, simple, modular, testable.
• "Poorly organized code means agents need to read more files than necessary—polluting their context and costing you tokens."
• Practical tips: (1) explain desired code organization alongside task requirements, (2) maintain consistent repo style for agent pickup, (3) review agent output for structure, not just correctness.