58e5a5b581
* test(#3566): pin per-install .gsd-runtime marker precedence in the isolation guard Failing-first regression for #3566: resolveRuntimeIdentity must consult the per-install marker (<install>/gsd-core/.gsd-runtime, written by every install since #2297) above the host-wide ~/.gsd/defaults.json whose leakage #2840 exists to prevent. In-process block drives the marker through the same _setInstallRuntimeMarkerForTests seam model-resolver.cts established. * fix(#3566): read the per-install .gsd-runtime marker above host-wide defaults in the isolation guard resolveRuntimeIdentity consulted ~/.gsd/defaults.json — the exact host-wide file whose runtime leakage #2840 exists to prevent — and never the per-install marker the installer has written for every runtime since #2297. On a 2-runtime machine the guard confidently resolved the WRONG runtime and silently went inert when that runtime declares no harnessIsolationFlag. Precedence is now GSD_RUNTIME > config.json runtime > .gsd-runtime marker > defaults.json, restoring #2840's design; the defaults rung stays last so single-runtime and pre-#2297 installs keep #3045 BLOCKER 2 behavior. * fix(#3566): apply the marker rung to the cursor subagent-start fallback; review fixes Review finding (spec pass): hooks/gsd-cursor-subagent-start.js's resolveFallbackIsolation mirrored the Claude hook's exact three-rung chain and shared the bug — same rung inserted between config.json and the host-wide defaults, same #2297-pattern seam, in-process regression + negative controls. Review finding (standards): dropped the one new raw-text assert.match on the block reason (CONTRIBUTING test-output rule); the reason-naming property stays pinned by the pre-existing #3045 row. * chore(#3566): add changeset fragment * chore(#3566): backfill changeset pr number --------- Co-authored-by: sim <sim@local>
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.