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OpenSpec

An AI coding assistant driven by specifications, helping developers write code more efficiently.

🌍 OverseasFreeOpen sourceDev开源APICLI

Platforms: WebAPI

Region: Overseas
Pricing: Free
Open source: Yes
GitHub Stars: ★ 53.8k
Source: GitHub
Added: 2026-06-10
Last verified: 2026-06-10
GitHub: github.com/Fission-AI/OpenSpec

Overview

OpenSpec is a specification-driven development tool designed specifically for AI coding assistants. It ensures alignment between humans and AI on project goals by defining clear specifications before writing code. Each change has its own dedicated folder containing proposals, specifications, design documents, and technical task lists, making the development process more organized. Supports over 20 AI assistants and integrates with existing tools, offering flexible workflows.

Key features

▪Specification-driven development
▪Supports multiple AI coding assistants
▪Flexible workflow
▪Suitable for individual and enterprise projects

Use cases

Software development team collaborationIndividual project managementCode refactoring and optimizationNew feature development

Pros

＋Improves code consistency
＋Reduces communication overhead
＋Supports multiple languages
＋Easy integration with existing tools

Limitations / notes

－Requires Node.js environment
－Higher learning curve

Who it's for

DevelopersSoftware engineersProject managersTechnical teams

This overview was compiled by AI from public sources and may contain inaccuracies — please refer to the official site.

FAQ

Is it free?

Yes, OpenSpec is free and open-source.

Does it support Chinese?

Documentation is primarily in English, but multilingual extensions are supported.

Can it be used commercially?

Yes, commercial use is allowed under the MIT license.

Does it require internet access?

Part of the functionality requires online access to call AI assistants.

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