# openspec-sync-specs

> Claude/Codex skill by [@fission-ai](https://omgskills.com/library/fission-ai/index.md) · 72k stars · Updated 2026-10-17

Sync delta specs from an OpenSpec change to main specs. Use when the user wants to update main specs with changes from a delta spec, without archiving the change. Also use when the user says "openspec sync" or "opsx sync".

Tags: ai, context-engineering, engineering, planning, prd, sdd, sdlc, spec, spec-driven-development, specification

## Install

```sh
git clone https://github.com/Fission-AI/OpenSpec /tmp/OpenSpec && ln -s /tmp/OpenSpec/skills/openspec-sync-specs ~/.claude/skills/openspec-sync-specs
```

## From README

Spec Delta Purpose Only on a delta that introduces a brand-new capability. Seeds the new main spec. ADDED Requirements Requirement: New Feature The system SHALL do something new. Scenario: Basic case WHEN user does X THEN system does Y MODIFIED Requirements Requirement: Existing Feature The system SHALL keep doing the existing thing, now also handling A. Scenario: Scenario the main spec already has WHEN user does X THEN system does Y Scenario: New scenario to add WHEN user does A THEN system does B REMOVED Requirements Requirement: Deprecated Feature RENAMED Requirements FROM: \#\#\# Requirement: Old Name TO: \#\#\# Requirement: New Name markdown Specification Purpose Short description of what this capability does and why it exists. Requirements Requirement: New Feature The system SHALL do something new.

## Links

- HTML page: https://omgskills.com/skills/fission-ai/openspec/openspec-sync-specs/
- GitHub: https://github.com/Fission-AI/OpenSpec
- Author: [@fission-ai](https://omgskills.com/library/fission-ai/index.md)

## More from this repo

- [draft-openspec-docs](https://omgskills.com/skills/fission-ai/openspec/draft-openspec-docs/index.md) — Collaborative page-drafting mode for the OpenSpec docs.
   - [@fission-ai](https://omgskills.com/library/fission-ai/index.md) · 73k stars
- [openspec-apply-change](https://omgskills.com/skills/fission-ai/openspec/openspec-apply-change/index.md) — Implement tasks from an OpenSpec change.
   - [@fission-ai](https://omgskills.com/library/fission-ai/index.md) · 72k stars
- [openspec-archive-change](https://omgskills.com/skills/fission-ai/openspec/openspec-archive-change/index.md) — Archive a completed OpenSpec change in the experimental workflow.
   - [@fission-ai](https://omgskills.com/library/fission-ai/index.md) · 72k stars