Breaking

New Open-Source /improve-react Command Auto-Fixes React Code Using GPT-5.6 Sol and Fable 5

July 13, 2026 at 19:15 EDT

Software Dev & Coding
AI Agents
Open Source

A new open-source command called /improve-react scans a React codebase for problematic code, triages it, and fixes it automatically using OpenAI's GPT-5.6 Sol or Anthropic's Fable 5. The tool was introduced on July 13, 2026, by Aiden Bai, the developer behind Million.js and the React Doctor project, extending automated code-quality work into an agentic, one-command workflow.

July 13, 2026 · React Doctor

One Command That Fixes Your React Code — Automatically

The open-source /improve-react scans a React codebase, triages problem spots, and applies repairs end-to-end — powered by frontier models GPT-5.6 Sol and Fable 5.

3-in-1

Detect → triage → repair in a single command

Frontier models — Sol as worker, Fable as planner

1 cmd

Installed via terminal as an open-source skill

The closed loop — how /improve-react works

1 · DETECT

Locate weak maintainability, performance & correctness code

→

2 · TRIAGE

Prioritize which issues to address first

→

3 · REPAIR

Apply fixes automatically via a frontier model

GPT-5.6 Sol coding benchmark

Reported Terminal-Bench 2.1 scores — standard vs Ultra mode

88.8%

Standard

91.9%

Ultra mode

The appeal

Low-friction, systematic codebase cleanup
Narrow React focus catches issues linters miss
Fable 5 plans, Sol implements — fast and cheap
Author reports highly effective early results

The caveats

Premium models make scale expensive — an "if you have $" note
Heavy token consumption is a recurring concern
Occasional Fable 5 instability reported
No independent benchmarks for the tool yet

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