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spec-driven-development
Creates specs before coding. Use when starting a new project, feature, or significant change and no specification exists yet. Use when drafting a PRD or requirements document with objectives and scope, or when requirements are unclear, ambi
- License
- MIT
- SKILL.md tokens
- 3,249
- Bundled files
- 0
- Bundled tokens (estimated)
- 0
Cost per 1,000 loads
Estimated input cost per 1,000 loads of SKILL.md only (characters ÷ 4). Bundled files, output tokens and execution are excluded.
| Model | Input / 1M tokens | 1,000 loads |
|---|---|---|
| Claude Opus 5 | $5.00 | $16.25 |
| Claude Sonnet 5 | $2.00 | $6.50 |
| Claude Haiku 4.5 | $1.00 | $3.25 |
Safety flags
Detected automatically from files; not a security audit.
- Runs scripts
- No
- Network access
- No
- Shell commands
- Yes
Works with
Open SKILL.md format
- Claude Code
- Codex
- Cursor
- GitHub Copilot
- Gemini CLI
- OpenCode
- Goose
Install
npx skills add addyosmani/agent-skills --skill spec-driven-developmentLast verified:
spec-driven-development FAQ
What does the spec-driven-development skill do?
Creates specs before coding. Use when starting a new project, feature, or significant change and no specification exists yet. Use when drafting a PRD or requirements document with objectives and scope, or when requirements are unclear, ambi Source: https://github.com/addyosmani/agent-skills/blob/main/skills/spec-driven-development/SKILL.md
What does the spec-driven-development skill cost to load?
SKILL.md is about 3,249 tokens. Estimated input cost per 1,000 loads: Claude Opus 5 $16.25; Claude Sonnet 5 $6.50; Claude Haiku 4.5 $3.25. Estimated input cost per 1,000 loads of SKILL.md only (characters ÷ 4). Bundled files, output tokens and execution are excluded. Prices: https://docs.anthropic.com/en/docs/about-claude/pricing
How do I install the spec-driven-development skill?
Skills CLI: npx skills add addyosmani/agent-skills --skill spec-driven-development. Claude Code: /plugin marketplace add addyosmani/agent-skills, then install the plugin from that marketplace. Download the spec-driven-development skill folder as a ZIP and upload it in Claude.ai skills settings.
Is the spec-driven-development skill safe?
Automatically detected flags: shell commands. Flags are detected automatically from the skill's files and are not a security audit; review the SKILL.md before installing.