2e056488d9
* test(#4067): pin advance-plan phase-complete guard matrix (RED) Five-case matrix: decline on unsummarized plans (regression), fire on fully-summarized phase, fail-open on unresolvable phase dir, idempotent decline, normal advance untouched. * fix(#4067): derive advance-plan phase-complete from disk, not the plan counter The phase-complete branch of state.advance-plan was decided purely by STATE.md's scalar plan counter (currentPlan >= totalPlans). A stale counter carried into a newly planned phase, or a counter raced by wave-parallel executors, let 'Phase complete — ready for verification' land while sibling plans were still executing. cmdStateAdvancePlan now re-decides that branch from disk before the write: every plan in the Current Position phase's directory must have a SUMMARY.md (scanPhasePlans single owner, the same source state.update-progress recalculates from). Outstanding plans decline the entire write byte-identically (idempotent, concurrency-safe, counter stays display-only); an unavailable disk answer fails open to the counter-derived decision. * fix(#4067): review round 1 — route phase-dir lookup through listMilestonePhaseDirs #3185 drift guard: no hand-rolled phases-dir readdirSync. Windowed (current-milestone) lookup first so an archived milestone's stale dir cannot shadow the live one; unscoped retry when the window cannot answer. Also restore the transform's undefined-data error semantics and extract scanOutstanding. * chore(#4067): add changeset fragment * chore(#4067): backfill PR number in changeset fragment --------- Co-authored-by: sim <sim@local>
GSD Core
Git. Ship. Done.
English · Português · 简体中文 · 日本語 · 한국어
A light-weight meta-prompting, context engineering, and spec-driven development system for Claude Code, OpenCode, Antigravity CLI, Kimi CLI, Kilo, Codex, Copilot, Cursor, Windsurf, and more.
What is GSD Core
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, and more) through a disciplined phase loop. It solves context rot — the quality degradation that accumulates as an AI fills its context window — by running all heavy research, planning, and execution work in fresh-context subagents while keeping your main session lean.
How it works
Each milestone repeats the same five-step loop, one phase at a time:
- Discuss — capture implementation decisions before anything is planned
- Plan — research, decompose, and verify the plan fits a fresh context window
- Execute — run plans in parallel waves; each executor starts with a clean 200k-token context
- Verify — walk through what was built; diagnose and fix before declaring done
- Ship — create the PR, archive the phase, repeat for the next one
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.
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.
Documentation
What's new in 1.7.0 → docs/whats-new-1.7.0.md
Tutorials — learning by doing:
How-to guides — task-focused recipes:
Reference — authoritative facts:
Explanation — concepts and design decisions:
Full index: docs/README.md. Other languages: 日本語 · 한국어 · Português · 简体中文.
Why it works
Most AI-coding setups fail at scale because context bloat silently degrades output quality, there is no shared memory between sessions, and nothing verifies that code actually works. GSD Core solves all three: heavy work runs in fresh subagents, structured artifacts like STATE.md and CONTEXT.md survive session boundaries, and the verify step walks through what was built and generates fix plans before a phase is declared done. See docs/explanation/context-engineering.md for the full reasoning.
Troubleshooting? See docs/how-to/recover-and-troubleshoot.md.
Community
| Project | Platform |
|---|---|
| gsd-opencode | Original OpenCode port |
| Discord | Community support |
Star History
License
MIT License. See LICENSE for details.
Claude Code is powerful. GSD Core makes it reliable.