GSD Core is a JavaScript-based meta-prompting and context-engineering framework designed to drive AI coding agents through a disciplined phase loop. It supports multiple runtimes and provides several installation commands for npm publishing.
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What it is
GSD Core is a context-engineering and spec-driven development framework that drives AI coding agents (Claude Code, Codex, Antigravity CLI, Kimi CLI, Copilot, Cursor, Windsurf, and more) through a disciplined phase loop. It addresses context rot by running heavy research, planning, and execution in fresh-context subagents while keeping the main session lean.
How it works
The tool repeats a five-step loop for each milestone: Discuss, Plan, Execute, Verify, Ship. Each phase uses fresh context and parallel execution where applicable to manage context window limitations. Verification includes walking through what was built and generating fix plans before declaring a phase done.
Getting started
Quickstart:
npx @opengsd/gsd-core@latest
The installer prompts for your runtime (Claude Code, OpenCode, Antigravity CLI, Kimi CLI, Kilo, Codex, Copilot, Cursor, Windsurf, and more) and whether to install globally or locally. The installer is required for cross-runtime compatibility — do not copy files from agents/ or commands/ directly.
On another runtime or without Node.js? See Install on your runtime: see the docs.
Once installed, start a new project or onboard an existing repo:
/gsd-new-project # greenfield project
/gsd-onboard # existing codebase
New here? Follow Your first project for a guided walkthrough from install to first shipped phase, or Onboarding an existing codebase for brownfield setup.
Recent releases
- v1.9.1 (2026-07-31) – Install:
npm i @opengsd/gsd-core@1.9.1ornpm i @opengsd/gsd-core@latest.- Enhancement: add a
reviewerentry type so third-party reviewer lanes ar
- Enhancement: add a
- v1.9.0 (2026-07-31) – Install:
npm i @opengsd/gsd-core@1.9.0ornpm i @opengsd/gsd-core@latest.- Feature: add a negotiated effortSurface axis and wire invocation-time ef
- v1.8.0 (2026-07-22) – Install:
npm i @opengsd/gsd-core@1.8.0ornpm i @opengsd/gsd-core@latest.- Feature: warn on stale model bake for static-frontmatter runtimes by @tr
- v1.7.0 (2026-07-15) – Install:
npm i @opengsd/gsd-core@1.7.0ornpm i @opengsd/gsd-core@latest.- Feature: warn on stale model bake for static-frontmatter runtimes by @tr
- v1.7.0-rc.6 (2026-07-12) – Pre-release published to npm under
nextdist-tag. Install:npm i @opengsd/gsd-core@1.7.0-rc.6ornpm i @opengsd/gsd-core@next.- Feature: feat(#16
Traction
- Stars: 7698
- Forks: 535
- Open issues: 145
License
MIT License. See LICENSE for details.