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* test(#4355): assert test:coverage:unit:raw carries --merge-async tests/c8-merge-async-flag.test.cjs asserted the opposite based on a disproven assumption that `--reporter none` skips c8's merge phase -- it does not (Report.run() computes the merge unconditionally before consulting the reporter list). This is the failing-first assertion for the fix in the next commit. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#4355): add --merge-async to test:coverage:unit:raw c8's Report.run() computes the full coverage merge unconditionally, even with --reporter none -- it only skips the final text/json output, not the merge dispatch (verified against node_modules/c8/lib/report.js). Without --merge-async this used the synchronous _getMergedProcessCov(), loading every raw per-process V8 coverage dump into memory at once and OOM-crashing release.yml's finalize-test job (run 33997057100) with a silent exit 1 and no diagnostic ~21s after the test suite itself finished cleanly ("# fail 0"). Same class already fixed on the other three coverage scripts via #4068/#4172. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(changeset): add changeset for #4355 coverage:unit:raw fix Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(changeset): backfill PR number for #4355 fix pr:0 -> pr:4356 Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
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.