Dev argues 'complex software systems' are 99% just LLM with Bash and a filesystem
ctjlewis · x · 2026-09-27
ctjlewis argues on X that what many describe as "complex software systems with many external components" is essentially just an LLM with access to Bash and a filesystem. By his estimate, 99% of the "external components" are filesystem and shell operations, while Computer Use, MCPs, and similar tooling account for only about 1% of tool calls and behavior — a pointed take on the gap between agent marketing and what agents actually do.
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