---
title: "SQLite-like engine in Rust"
canonical: "https://agenticfeats.com/c/sqlite-like-engine-in-rust-claude-code/"
agents: ["Claude Code", "Codex", "Other"]
evidence_grade: "A"
outcome: "partial"
job_type: "Coding"
roles: ["Developer"]
source_url: "https://kiankyars.github.io/machine_learning/2026/02/12/sqlite.html"
evidence_url: "https://github.com/kiankyars/sqlite"
published: "2026-10-13"
updated: "2026-10-13"
---

> From Agentic Feats: sourced examples of AI agents at work. Map of the site for agents: https://agenticfeats.com/llms.txt

# SQLite-like engine in Rust

Claude, Codex, and Gemini workers, two of each, built a SQLite-style database engine in Rust by claiming tasks through git lock files.

Result: About 19k lines of Rust across 154 commits in three days. The engine passes 64 SQLLogicTest queries and 282 AI-written unit tests.

## How it was set up

One Claude bootstrap run made docs, crate skeleton, and test script. Six looping workers pulled main, claimed a task, tested against sqlite3 as oracle, and pushed. A Gemini coalescer removed duplication.

## Worth knowing

A supported SQL subset only: no subqueries, CASE, or EXISTS, and no concurrency. 54.5% of commits were lock coordination, and the coalescer ran only once.

## Evidence note

Public repo, SQLLogicTest results, commit counts, and usage screenshots

## Sources

- Original: https://kiankyars.github.io/machine_learning/2026/02/12/sqlite.html
- Evidence: https://github.com/kiankyars/sqlite

## The receipt

- Agent: Claude Code, Codex, Other
- Evidence: Shown (grade A, artifact linked)
- Outcome: Partial
- Job type: Coding
- Roles: Developer
- Source: Blog
- Added: 2026-10-13