90fff40f5a
* test(#3900): a unix socket under the repo root must not break the overlay (failing first) * fix(#3900): the overlay walker skips non-regular files (sockets, FIFOs, device nodes) The walker classified every not-a-directory entry as a file, so a unix socket anywhere under the repo root (an MCP server, a language-server daemon, a watcher) made copyFileSync throw ENXIO — the reporter measured 32 local test failures across 6 files, all in before() hooks, none about the code under test; a FIFO would block until a writer appeared. The hard-link path does not save it: the overlay sits under tmpfs, so cross-device EXDEV always falls through to the copy. One guard at the classification site (srcStat.isFile() before the copy/link branches) — sockets, FIFOs, and device nodes are not repository content; CI never saw this because a fresh clone has no working-tree daemons, which is exactly why it ate local debugging time. Also adds opts.root (test-only root override, default REPO_ROOT) so the regression tests build the overlay from a tiny synthetic root in milliseconds instead of paying a full repo walk. * chore(#3900): changeset fragment (pr number backfilled after PR creation) * fix(#3900): review fold-ins — sibling cold-fixture guard, changeset format, root doc buildColdInstallTree enumerated the live repo's hooks/ with a NAME-only filter — the same class #3900 documents: a daemon socket or FIFO inside hooks/ would reach cpSync and throw ENXIO (or block). Dirent type guard added. The changeset gains the mandated bold user-visible lead, and opts.root is documented at its definition (mirroring cold-runtime-lib- fixture's repoRoot convention). * chore(#3900): backfill changeset PR number (4062) --------- 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.