Turn approved specs into long-running autonomous implementation. A minimal, adaptable SDD harness with Agent Skills for Claude Code, Codex, Cursor, Copilot, Windsurf, OpenCode, Gemini CLI, and Antigravity.
cc-sdd is a spec-driven development workflow for coding agents: it turns approved software specifications into requirements, designs, task plans, and extended autonomous implementation. Developers use it across several AI coding agents, with independent review and task-level continuation for long-running work. The catalogue entries provide commands, skills, agents, and instructions for using this workflow.
This repository also configures its own agents. See what cc-sdd tells them →
Skill Codex
Add or extend coding-agent support in cc-sdd by executing the SOP in docs/cc-sdd/sop-new-agent.md end-to-end. Use when introducing a new agent, adding a subagent-capable variant, or evaluating migration of an existing supported agent to skills-based templates.
Skill Codex
Investigate implementation failures using root-cause-first debugging. Use when an implementer is blocked, verification fails, or repeated remediation does not converge.
Skill Claude CodeCodex
Entry point for new work. Determines the best action path or work decomposition (update existing spec, create new spec, mixed decomposition, or no spec needed) and refines ideas through structured dialogue.
Skill Claude CodeCodex
Implement approved tasks using TDD with subagent dispatch. Runs all pending tasks autonomously or selected tasks manually.
Skill Codex
Review a task implementation against approved specs, task boundaries, and verification evidence. Use after an implementer finishes a task, after remediation, or before accepting a task as complete.
Skill Claude CodeCodex
Create complete specs (requirements, design, tasks) for all features in roadmap.md using parallel sub-agent dispatch by dependency wave.
Skill Claude CodeCodex
Create comprehensive technical design for a specification.
Skill Claude Code
Initialize a new specification with detailed project description.
Skill Claude Code
Quick spec generation with interactive or automatic mode.
Skill Claude CodeCodex
Generate comprehensive requirements for a specification.
Skill Claude CodeCodex
Show specification status and progress.
Skill Claude CodeCodex
Generate implementation tasks for a specification.
Skill Claude CodeCodex
Create custom steering documents for specialized project contexts.
Skill Claude CodeCodex
Manage {{KIRODIR}}/steering/ as persistent project knowledge.
Skill Claude CodeCodex
Interactive technical design quality review and validation.
Skill Claude CodeCodex
Analyze implementation gap between requirements and existing codebase.
Skill Claude CodeCodex
Validate feature-level integration after all tasks are implemented. Checks cross-task consistency, full test suite, and overall spec coverage.
Skill Codex
Verify completion and success claims with fresh evidence. Use before claiming a task is complete, a fix works, tests pass, or a feature is ready for GO.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: