GSD CoreThe original spec-driven context engineering framework for AI agents.
The prompt-driven system that started the movement: Git. Ship. Done. Drives Claude Code, Cursor, Codex, Antigravity CLI, Copilot, and Windsurf through a repeatable phase loop that eliminates context rot.
Git. Ship. Done.
GSD Core pioneered the concept that AI coding assistants should never write unstructured code directly into a giant, bloated context. By forcing explicit discussion, formal plans, fresh-context subagents, and verification proof, GSD Core turned experimental AI chat into professional software delivery.
Why GSD Core Works
Built to eliminate context rot and turn volatile chat sessions into predictable engineering.
Zero Context Rot
Solves model hallucinations and quality degradation by executing heavy research, planning, and coding in fresh subagent context windows.
Disciplined 5-Step Loop
Every milestone follows Discuss → Plan → Execute → Verify → Ship, ensuring code is never written before requirements and trade-offs are settled.
Universal Cross-Runtime
Native prompt templates and rules for Claude Code, Cursor, OpenAI Codex, Google Antigravity CLI, GitHub Copilot, Windsurf, OpenCode, and Kimi CLI.
Spec-Driven Verification
Automated walkthroughs verify deliverables against discrete task contracts and acceptance criteria before declaring a phase complete.
Explore the 5-Step Loop & OG Engine
Step through Discuss, Plan, Execute, Verify, and Ship to see how fresh context subagents prevent errors.
Context Engineering & 5-Step Loop Architecture
Run plans in parallel execution waves. Every executor subagent begins with a clean, unbloated 200k-token context window.
/gsd-execute
Atomic code commits & diff patches
Fresh subagent spawned per task in wave
Standard Command Reference
Instantly accessible inside Claude Code, OpenCode, Cursor, and your favorite agent terminal.
| Command | Workflow Action |
|---|---|
| /gsd-new-project | Initialize a new greenfield project with charter boundaries, tech stack, and phase rules. |
| /gsd-onboard | Onboard an existing codebase, mapping architecture, entry points, and dependencies. |
| /gsd-discuss | Gather intent and resolve architectural decisions with human steering before planning. |
| /gsd-plan | Research codebase and break the milestone into discrete, verifiable task contracts. |
| /gsd-execute | Execute plans in parallel waves with fresh 200k-token context executor subagents. |
| /gsd-verify | Walk through deliverables, run test suites, and diagnose fixes before declaring done. |
| /gsd-ship | Create pull request, archive phase artifacts, tag release, and advance to next phase. |
Bring GSD Core into Your Runtime
Run the universal installer to configure slash commands and prompt blueprints in seconds.