# openspec-implementation

Executes approved OpenSpec proposals sequentially, testing each task before marking it done and tracking everything in TodoWrite.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 1400 installs · ★ 10
- Author: forztf
- License: not stated · policy=link-only · description only; the file stays with the author
- Source: https://github.com/forztf/open-skilled-sdd/tree/HEAD/skills/openspec-implementation/SKILL.md
- Updated: 2025-11-28
- HTML: https://affpapa.org/en/nevibecode/skills/openspec-implementation

## What it does

This skill guides the agent through implementing approved OpenSpec proposals. It starts by loading context from `proposal.md`, task lists in `tasks.md`, and requirement changes inside the `specs` folder.

Execution relies on a strict loop: read, implement, run tests, and confirm acceptance criteria. The agent loads items into `TodoWrite` beforehand. Tasks are tackled one by one in exact order. Batching edits or skipping verification is not permitted. When a blocker occurs, the agent keeps the task marked as in-progress and creates a distinct task to address the obstacle.

Spec deltas remain frozen during development. Any necessary adjustments wait until the archive stage. Once all tasks pass testing, the agent creates `spec/changes/{change-id}/IMPLEMENTED` with a timestamp marker.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add forztf/open-skilled-sdd --skill openspec-implementation -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/openspec-implementation/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/openspec-implementation/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add forztf/open-skilled-sdd --skill openspec-implementation -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/openspec-implementation/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add forztf/open-skilled-sdd --skill openspec-implementation -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/openspec-implementation/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install forztf/open-skilled-sdd openspec-implementation
```

2. **Manually: put the files in place**
- File: `.github/skills/openspec-implementation/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add forztf/open-skilled-sdd --skill openspec-implementation -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/forztf/open-skilled-sdd --path skills/openspec-implementation
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/openspec-implementation/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add forztf/open-skilled-sdd --skill openspec-implementation -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/forztf/open-skilled-sdd/tree/HEAD/skills/openspec-implementation/SKILL.md

## When to use it
- execute specification tasks sequentially without missing steps
- validate code with tests and linters after every single change
- keep visible task progress up to date using TodoWrite
- record verified completion in the IMPLEMENTED marker file

## Example prompts
- Implement approved proposal `spec/changes/auth-v2` step by step
- Work through tasks for `billing-setup` with TodoWrite tracking
- Apply changes from `user-profile` spec and verify each completed task

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From the same set: [forztf/open-skilled-sdd](https://affpapa.org/en/nevibecode/by/forztf/open-skilled-sdd.md) — 3 cards

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