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* fix(#706): skip rescueSummaryArtifacts when SUMMARY is already committed rescueSummaryArtifacts now probes `git cat-file -e HEAD:<path>` before copying a SUMMARY.md into the main checkout. When the file is already committed on the worktree branch, copying it as an untracked file causes `git merge --no-ff` to abort with "untracked working tree files would be overwritten by merge" — a permanent merge_failed cleanup-wave failure. Fail-closed on timeout: if cat-file is unreliable we skip rescue (the merge will surface the collision as it did before, which is recoverable). Adds 4 new test cases in worktree-safety.test.cjs covering: - committed SUMMARY skipped, merge succeeds (#706 regression case) - committed SUMMARY skipped even when timeout (fail-closed) - uncommitted SUMMARY still rescued (existing contract preserved) - rescue failure on ENOSPC still propagates (unchanged) Closes #706 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * chore: add changeset for #706 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * fix(#706): treat cat-file exit 128 as uncertain — skip rescue (fail-closed) The previous guard skipped rescue only when `exitCode === 0` (committed) or `timedOut`. Any other non-zero exit, including `128` (fatal git error: corrupt object store, unborn HEAD, missing repo), fell through and PROCEEDED with rescue — potentially re-creating the #706 untracked-file merge collision. Fix: rescue ONLY when `exitCode === 1` (cat-file definitively reports the object absent). All other outcomes — 0 (committed), 128 (fatal), null/SIGTERM (timeout), or any other code — are treated as "uncertain → skip rescue". Also corrects the JSDoc bullet that still referenced `git ls-files --error-unmatch` (the old mechanism); updated to `git cat-file -e HEAD:<relPath>`. Regression test added: asserts rescue is SKIPPED when cat-file returns exit 128, leaving the merge to surface the issue safely rather than silently copying an already-committed file. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * chore: link changeset to PR #709 --------- Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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, Gemini 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, Gemini 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, Gemini 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 your first project:
/gsd-new-project
New here? Follow Your first project for a guided walkthrough from install to first shipped phase.
Documentation
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.