Defines the implementation contract before planning or coding so work is built against explicit goals, users, scope, non-goals, assumptions, acceptance criteria, and verification. Use when creating or changing a feature, product workflow, API, integration, migration, user-facing behavior, cross-team handoff, or any task where Codex could implement the wrong thing correctly; when the user asks for a spec, requirements, PRD, contract, acceptance criteria, or "what exactly are we building".
How to install spec-driven-development?
pimenov/codex-first-skills-pack/spec-driven-development
$npx -y skills add pimenov/codex-first-skills-pack --skill spec-driven-developmentInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/pimenov/codex-first-skills-pack" --skill "pimenov/codex-first-skills-pack/spec-driven-development"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/pimenov/codex-first-skills-pack" that are relevant to the current task. Run `npx skills add "https://github.com/pimenov/codex-first-skills-pack"` and select the relevant skills, then follow their instructions.
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