35df0891af
The strict live-config guard this PR ships went red on CI: the suite creates $HOME/.gsd/defaults.json. Diagnosed rather than suppressed, because the guard is right — this is #2665's class arriving through the one door the scrub set is structurally unable to close. bin/install.js writeNonClaudeDefaults() (#2834) writes path.join(os.homedir(), '.gsd', 'defaults.json') for every non-Claude runtime. os.homedir() consults NO GSD variable, so: - no entry in CONFIG_LOCATION_ENV_KEYS can reach it, however the set is derived; and - blanking GSD_HOME does not reach it either -- a blank GSD_HOME falls back to exactly that homedir(). Only a sandboxed HOME contains it, and HOME is deliberately excluded from TEST_ENV_BASE because blanking it would break far more than it fixed. So the containment belongs per-spawn, which is the discipline the suite already applies by hand -- install-minimal-hooks.test.cjs:576 carries a comment naming this exact hazard for the --codex spawn, while the parameterized --${runtime} spawn 130 lines below it does not. Instance fixed, class open. Rather than add a fifth hand-synced env shape to a PR whose subject is that hand-synced copies drift, this adds ONE export -- installSpawnEnv() in tests/helpers.cjs -- and routes every raw installer spawn through it, including the shared tests/helpers/install-shared.cjs installerEnv(), which every install suite already consumes. Callers passing an explicit { HOME, USERPROFILE } are unaffected: overrides spread last. Census (measured, not reasoned): of the 119 test files that spawn bin/install.js, exactly four wrote into a sandboxed $HOME before this commit -- install, copilot-install, install-minimal-hooks, opencode-plugin-adapter -- and zero do after. Only install.test.cjs sits in CI's targeted lane, which is why ubuntu went red on one file while the macOS full lanes went red on four. Attribution: the leak reproduces unchanged at upstream/next itself, so the defect is base-owned and pre-existing; only the detector is new. The guard found a real leak on next within one run. No new failures: the surviving names under a sandboxed HOME (folded:enh-2380-sync-skills, getGlobalConfigDir (Copilot)) fail at base too, and base additionally fails folded:bug-3288-model-catalog-install-path, which this tree does not.
GSD Core
Git. Ship. Done.
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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.