# Vercel — How to build agents with filesystems and bash

- Company: Vercel (vercel.com)
- Announced: 2026-01-09T13:00:00+00:00
- Category: not stated
- Coverage: not counted
- Announcement: no
- Group: routine
- Source: https://vercel.com/blog/how-to-build-agents-with-filesystems-and-bash
- Record: https://forck.live/items/20768-how-to-build-agents-with-filesystems-and-bash
- Subject: v0 / AI SDK / AI Gateway

Vercel describes an agent architecture that replaces custom tooling with a filesystem tool and a bash tool. The approach reduced the cost of their sales call summarization agent from about $1.00 to about $0.25 per call on Claude Opus 4.5 while improving output quality. The post explains how structuring data as files and using Unix commands allows agents to retrieve precise context on demand.

## Evidence

Verbatim from https://vercel.com/blog/how-to-build-agents-with-filesystems-and-bash:

> We replaced most of the custom tooling in our internal agents with a filesystem tool and a bash tool. Our sales call summarization agent went from ~$1.00 to ~$0.25 per call on Claude Opus 4.5, and the output quality improved.

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