DataRow + Holmes — Jederilson S. Luz

$ cat ./summary.md

Summary

DataRow is Overzone's internal R&D platform: a no-/low-code environment where I assemble custom business apps from datasets, scripts, API and DB connections, plus a custom AI agent harness named Holmes. I built the product end to end: runtime, UI, data layer, prompting, and infra.

⌘Most complete AI-agent work in my portfolio: Holmes supports tool use, retrieval over tables, scripts as tools, and an audit trail for every step.

$ cat ./responsibilities.txt

Responsibilities

→Designed the agent harness from scratch — tool-use protocol, retrieval over tables, scripts as callable tools, multi-step reasoning, audit log of every action.
→Built the data layer — Postgres + Drizzle — and the API layer that Holmes calls into to read/write app data.
→Built the UI for app composition: dataset definitions, dashboards, charts, and the chat surface where Holmes lives.
→Wrote the prompting + behavior guardrails for Holmes, including refusal patterns and tool-budgeting.
→Owned the entire stack solo — frontend, backend, infra, agent runtime.

$ ls ./tech

Stack

Next.jsTypeScriptShadcnTailwindNode.jsPostgreSQLDrizzleClaude · Anthropic APICustom agent harnessRecharts

$ cat ./company.json

Company

Overzonefounder

Software studio I founded. We design, build, and operate web/mobile products for SMBs and growth-stage startups across LATAM, plus internal R&D like DataRow, our AI-agent platform.

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$ ls ../overzone