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oh-my-sdd

v0.2.4

Published

Global Claude Code skill that enforces Spec-Driven Development (SDD): consult the knowledge base, write specs, then implement.

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Links

Git

Maintainers

silas.pascoalsilas.pascoal

Keywords

claudeclaude-codespec-driven-developmentsddskillagents

Readme

oh-my-sdd

sdd-header

A set of global Claude Code skills that rigorously enforce Spec-Driven Development (SDD): before implementing any task, Claude analyzes the project, generates constitution.md → spec.md → plan.md → tasks.md, with mandatory human validation before implementation is allowed to start.

📖 Documentation: English · Português

Installation

npx oh-my-sdd install

This installs the 6 skills globally in ~/.claude/skills/, available in any project opened in Claude Code — installation does not depend on the directory the command is run from.

Architecture

An orchestrator skill (oh-my-sdd) activates, in sequence, 5 specialized skills — one per SDD phase:

| Skill | Responsibility | |---|---| | oh-my-sdd | Orchestrates the flow, identifies the input (free text or Jira) and activates the others in order | | oh-my-sdd-constitution | Analyzes the project (stack, conventions, lint) and generates/confirms .oh-my-sdd/constitution.md, asking the user only what it can't infer | | oh-my-sdd-specify | Generates spec.md in EARS/GEARS — human checkpoint #1 | | oh-my-sdd-plan | Translates the validated spec into technical decisions (plan.md) | | oh-my-sdd-tasks | Breaks the plan into atomic tasks (tasks.md) — human checkpoint #2 | | oh-my-sdd-implement | Implements task by task, only after both checkpoints are confirmed |

Each installed skill is self-contained: it gets its own copy of knowledge/, the SDD knowledge base (maturity levels, EARS/GEARS syntax, artifact hierarchy, practical examples) that underpins how each phase generates its document.

Usage

Once installed, the flow is automatically discovered by Claude Code whenever a task should be specified before being implemented. It can also be invoked directly:

/oh-my-sdd "add a logout endpoint that invalidates the refresh token"
/oh-my-sdd PROJ-123
/oh-my-sdd https://company.atlassian.net/browse/PROJ-123

Other commands

npx oh-my-sdd status      # shows which of the 6 skills are installed and whether any file was manually modified
npx oh-my-sdd uninstall   # removes the 6 skills from ~/.claude/skills/

Knowledge base

The knowledge/ folder documents the SDD fundamentals used by every skill: maturity levels (spec-first, spec-anchored, spec-as-source), best practices for writing specs and constitutions, EARS/GEARS syntax, and complete practical examples.

License

MIT