Agent skill

openspec-sync

Sync delta specs from a change into main specs using `/opsx:sync`, without archiving the change. Use when the user says "sync specs", "merge specs to main", "/opsx:sync", or needs to update main specs mid-change.

View SKILL.md on GitHub Repository
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Install this agent skill to your Project

npx add-skill https://github.com/partme-ai/full-stack-skills/tree/main/skills/openspec-skills/openspec-sync

SKILL.md

OpenSpec Sync Skill

Use /opsx:sync to merge delta specs from a change into the main openspec/specs/ directory without archiving the change. The change remains active after sync. This is optional — openspec-archive handles syncing automatically when archiving.

When to Use

  • Long-running change where the user wants specs in main before archiving.
  • Multiple parallel changes need updated base specs.
  • The user wants to review/preview the merge separately before archiving.

Prerequisites

  • An active change with delta specs in specs/.

Workflow

  1. Run sync

    • /opsx:sync — sync the current/inferred change.
    • /opsx:sync add-dark-mode — sync a specific change by name.

  2. What happens

    • Reads delta specs from the change folder.
    • Parses ADDED / MODIFIED / REMOVED sections.
    • Merges changes into openspec/specs/.
    • Preserves existing content not mentioned in the delta.
    • The change remains active (not archived).

  3. Verify

    • Review the updated specs in openspec/specs/.

Outputs

  • Updated openspec/specs/ with delta changes merged.
  • Change remains active in openspec/changes/<name>/.

Next Steps

  • Continue working on the change, or use openspec-archive when done.

Troubleshooting

  • "No delta specs": The change has no specs/ directory; create specs via openspec-continue or openspec-ff first.
  • Conflicts with other changes: Sync handles merging at the requirement level; if two changes modify the same requirement, the latest sync wins.

References

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