OpenSpec Plus Spec

OpenSpec Plus Spec is a Writing skill for Claude Code, published by sudokar in openspec-plus.

174 stars9 forkson sudokar/openspec-plusAdded 2026/09/07+9% in starsRepository updated 2026/09/03

agentic-skillsaiai-assisted-developmentai-code-generationai-code-qualityclaude-codecode-qualitycodingcoding-agentdevingithub-copilotopencodeopenspecpi-agentsdlcskillsspec-driven-developmenttddtest-driven-developmentwindsurf

Install in seconds

Install OpenSpec Plus Spec

Copy OpenSpec Plus Spec into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/sudokar/openspec-plus/tree/main/skills/openspec-plus-spec ~/.claude/skills/openspec-plus-spec

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/sudokar/openspec-plus.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/openspec-plus-spec/SKILL.md in sudokar/openspec-plus
Installs to: ~/.claude/skills/openspec-plus-spec
Collection: One of 6 skills cataloged from this repository
Category: Writing — 1328 skills

What OpenSpec Plus Spec does

OpenSpec Plus Spec guides the OpenSpec specification phase to produce complete, testable, unambiguous requirements in Gherkin. Use it when creating, updating, reviewing, or refining an OpenSpec specification.

OpenSpec Plus Spec is cataloged under Writing on DirSkills. OpenSpec Plus Spec comes from a repository tagged agentic-skills, ai, ai-assisted-development, ai-code-generation and ai-code-quality.

Documentation

README

Excerpt

OpenSpec Plus Spec

Mission

Strengthen specification quality. Requirements complete, testable, unambiguous, expressed as Gherkin scenarios for behavioral correctness, aligned with approved proposal and any existing design. Improves requirement quality before design (spec-first) or aligns requirements with existing design boundaries (design-first).

This skill is RIGID. NEVER write any spec file before completing Phase 1, presenting analysis to user, passing pre-write alignment gate, and (after writing) running self-review subagent. Running analysis internally and writing immediately is a skill violation — even if you checked every gate.

Red flags — STOP, you are about to violate this skill:

This is the opening of the README. Read the full README on GitHub.

Frequently asked about OpenSpec Plus Spec

What else does sudokar publish alongside OpenSpec Plus Spec?
OpenSpec Plus Spec is one of 6 skills that DirSkills catalogs from sudokar/openspec-plus, the repository it ships in. Its siblings there include OpenSpec Plus Apply, OpenSpec Plus Design and OpenSpec Plus Proposal. Each one is a separate skill with its own page in this directory, installs the same way OpenSpec Plus Spec does, and is maintained by sudokar in that same repository. The rest of the collection is listed on the sudokar/openspec-plus page.
How does OpenSpec Plus Spec compare to other Writing skills?
OpenSpec Plus Spec ranks #1159 by stars among the 1328 Writing skills in this catalog. The most-starred ones next to it are Article Writing, Social Media Content Calendar and Knowledge Comic Creator. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of OpenSpec Plus Spec against them. Open each page to compare what they document and how they install.