Software Development & Delivery · Public

OpenSpec

Spec-driven development (SDD) for AI coding assistants.

Best fitUsers who want source-backed project understanding before installing it.

Check whether this project matches your task before installing it.

What it can doskill, recipe, host_instruction, eval, preflight

Review the portable capability path.

Before continuingVerify in a sandbox

Do not treat a preview pack as a proven local install.

GitHub snapshot55k stars

3.9k forks · 60 contributors

Doramagic.ai Last verification date: 2026-07-09 Verification method: source evidence, semantic profile, public page gate, and static build acceptance.

Official first step Read manual preview Source repository

Publication status · 2026-07-09

What is OpenSpec?

Spec-driven development (SDD) for AI coding assistants.
Best fit: Users who want source-backed project understanding before installing it.
Not for: Not for users who want to skip sandbox verification or cannot accept configuration, permission, or maintenance overhead.
Capability added to an AI workflow: skill, recipe, host_instruction, eval, preflight
First safe verification step: Verify the smallest path in an isolated environment and keep a rollback path.
Verification state: source, Quick Start, and sandbox install checks are recorded as passed.
Top risk: May increase setup, validation, or first-run risk for the user.
Evidence base: https://github.com/Fission-AI/OpenSpec, https://github.com/Fission-AI/OpenSpec#readme, Human Manual, Pitfall Log

Quick decision

Use this section to decide whether the project is worth a deeper read.

Best forUsers who want source-backed project understanding before installing it.

Match the project to your task before installing it.

Capabilityskill, recipe, host_instruction, eval, preflight

Spec-driven development (SDD) for AI coding assistants.

RepositoryFission-AI/OpenSpec

55k stars · 3.9k forks

What it can do

Translate the upstream project into concrete capabilities the user can judge before installing.

Overview and Getting Started

Related topics: Core Architecture and Workflow System, AI Tool Integrations and Adapter System

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

Core Architecture and Workflow System

Related topics: Overview and Getting Started, AI Tool Integrations and Adapter System, Advanced Features, Workspaces, and Common Issues

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

AI Tool Integrations and Adapter System

Related topics: Overview and Getting Started, Core Architecture and Workflow System, Advanced Features, Workspaces, and Common Issues

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

Advanced Features, Workspaces, and Common Issues

Related topics: Core Architecture and Workflow System, AI Tool Integrations and Adapter System

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

Doramagic Pitfall Log

Source-linked risks stay visible on the manual page so the preview does not read like a recommendation.

Source: Doramagic discovery, validation, and Project Pack records

Sources: https://github.com/Fission-AI/OpenSpec, Human Manual, Project Pack evidence, and downstream validation signals.

Community Discussion Evidence

Project-level external discussion stays visible on the detail page, not only inside the manual.

Stars55k stars

Forks3.9k forks

Contributors60 contributors

Licenseunknown

Community Discussion Evidence

12 source-linked items

Review these external discussions before using OpenSpec with real data or production workflows. They are review inputs, not standalone proof that the project is production-ready.

01
Main spec is never created for the first change in a greenfield project
github / github_issue
02
Why Cursor version is still 2mo ago
github / github_issue
03
Feature Request: Add support for ZCode (Zhipu AI Agents)
github / github_issue
04
Feature Request: Add support for ZCode (Zhipu AI Agents)
github / github_issue
05
Agent discovery: map natural-language "openspec <verb>" to /opsx:<verb>
github / github_issue
06
[Community Integration Proposal] Minimal AISOP execution graph for the O
github / github_issue
07
`openspec config set workflows '[...]'` fails — `config set` cannot set
github / github_issue
08
Zed IDE support?
github / github_issue
09
spec-driven fast-path workflow silently produces stale specs with no rec
github / github_issue
10
Feature Request: Provide an `openspec diff` command to show differences
github / github_issue
11
v1.4.1 - Update Fix
github / github_release
12
Installation risk requires verification
GitHub / issue

How to start

Only source-backed commands are shown here. Verify them in an isolated environment first.

Try the prompt first

Test the workflow without installing the upstream project.

preview

Read the Human Manual

Understand inputs, outputs, limits, and failure modes.

manual

Take context to your AI host

Use the compiled assets in your preferred AI environment.

context

Run sandbox verification

Confirm install commands and rollback before using a primary environment.

verify

npm install -g @fission-ai/openspec@latest

Official start command · https://github.com/Fission-AI/OpenSpec#readme · verified: yes

Human Manual

The English page must expose the real manual, not a short placeholder.

8+ sections · Human Manual

OpenSpec Manual

Spec-driven development (SDD) for AI coding assistants.

Open the full manual

https://github.com/Fission-AI/OpenSpec Project Manual
Table of Contents
Overview and Getting Started
Related Pages
What is OpenSpec
Core Concepts
Installation and Initialization
The Standard Workflow

Overview and Getting Started

Related topics: Core Architecture and Workflow System, AI Tool Integrations and Adapter System

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

Core Architecture and Workflow System

Related topics: Overview and Getting Started, AI Tool Integrations and Adapter System, Advanced Features, Workspaces, and Common Issues

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

AI Tool Integrations and Adapter System

Related topics: Overview and Getting Started, Core Architecture and Workflow System, Advanced Features, Workspaces, and Common Issues

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

Advanced Features, Workspaces, and Common Issues

Related topics: Core Architecture and Workflow System, AI Tool Integrations and Adapter System

Source: https://github.com/Fission-AI/OpenSpec / Human Manual

Doramagic Pitfall Log

Source-linked risks stay visible on the manual page so the preview does not read like a recommendation.

Source: Doramagic discovery, validation, and Project Pack records

AI Context Pack and portable assets

After deciding to continue, take the project context into your own AI host.

Complete pack plus user-owned assets

These files are planning and verification assets for Claude Code, Codex, Gemini, Cursor, ChatGPT, and other AI hosts.

Download complete pack Read Human Manual

BundleComplete Project Pack AssetAI Context Pack AssetBoundary & Risk Card AssetHuman Manual AssetPitfall Log AssetPrompt Preview AssetQuick Start EvidenceREPO_INSPECTION.json

Preflight checks

Treat this page as a planning asset, not proof that your local environment is ready.

The manual is generated from source-linked project files and Doramagic validation signals.
Community evidence warnings stay visible instead of being converted into marketing claims.
This English page is indexable because the locale quality gate passed and explicit English index approval is enabled.
Use the upstream repository as the final authority for installation commands, license, and version-specific behavior.

Pitfall Log and verification risks

Doramagic surfaces high-risk items before users treat a candidate capability as verified.

high

Maintenance risk requires verification

May increase setup, validation, or first-run risk for the user.

high

Security or permission risk requires verification

Developers may expose sensitive permissions or credentials: Feature Request: Add support for ZCode (Zhipu AI Agents)

high

Security or permission risk requires verification

May increase setup, validation, or first-run risk for the user.

medium

Installation risk requires verification

Developers may fail before the first successful local run: `openspec config set workflows '[...]'` fails — `config set` cannot set the array-typed `workflows` key

medium

Installation risk requires verification

Upgrade or migration may change expected behavior: v1.1.0 - Cross-Platform Fixes, Nix Improvements

medium

Installation risk requires verification

Upgrade or migration may change expected behavior: v1.2.0 - Profiles, Pi & Kiro Support

medium

Installation risk requires verification

Upgrade or migration may change expected behavior: v1.3.0 - New Tool Integrations

medium

Installation risk requires verification

Upgrade or migration may change expected behavior: v1.3.1 - Path & Telemetry Fixes