openspec-apply

Q: How do I install openspec-apply?

Run npx skills add https://github.com/full-stack-skills/openspec-skills --skill openspec-apply in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/openspec-apply/ (personal) or .claude/skills/openspec-apply/ (project).

by full-stack-skillsProductivity & Automation

Implement tasks from the change using /opsx:apply, working through the task list and checking off items. Use when the user says "implement", "apply the change", "/opsx:apply", or "start coding from tasks".

Installs: 106
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/full-stack-skills/openspec-skills --skill openspec-apply

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads openspec-apply automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

OpenSpec Apply Skill

Use /opsx:apply to implement tasks from a change. The agent reads tasks.md, works through tasks one by one, writes code, creates files, runs tests as needed, and checks off completed items with [x].

When to Use

All planning artifacts are complete and the user wants to implement.
The user says "implement", "apply", "start coding", "execute tasks".
Resuming implementation after an interruption.

Prerequisites

Planning artifacts complete — at minimum tasks.md exists (created via openspec-ff or openspec-continue).

Workflow

Start implementation
- /opsx:apply — apply the current/inferred change.
- /opsx:apply <change-name> — apply a specific change.
Read tasks
- The agent reads tasks.md and identifies incomplete tasks (unchecked [ ] items).
Work through tasks
- For each task: read relevant specs, design, and existing code; write code; create/modify files; run tests.
- Mark each task complete with [x] in tasks.md.
Handle issues
- If a task reveals that the design was wrong, edit the artifact (e.g. design.md) and continue.
- OpenSpec is fluid — updating artifacts during implementation is expected and encouraged.
Resume if interrupted
- Run /opsx:apply again; it picks up where it left off based on checkbox state.

Outputs

Code changes (new files, modified files) implementing the tasks.
tasks.md updated with [x] for completed tasks.

Next Steps

Use openspec-verify to validate implementation matches artifacts.
Use openspec-archive to archive the completed change.

Troubleshooting

"Change not found": Specify the change name: /opsx:apply add-dark-mode.
Tasks seem wrong: Edit tasks.md (or use /opsx:continue to regenerate) before applying.
Implementation diverges from design: Edit design.md or specs/ as needed; OpenSpec is iterative.

References

FAQ

What does the openspec-apply skill do?

How do I install openspec-apply?

Run npx skills add https://github.com/full-stack-skills/openspec-skills --skill openspec-apply in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/openspec-apply/ (personal) or .claude/skills/openspec-apply/ (project).

Which AI agents can use openspec-apply?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is openspec-apply safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains openspec-apply?

It is published by full-stack-skills in full-stack-skills/openspec-skills. It has 106 recorded installs.