924f649f87
Spike outcome for #3625: evaluate cross-spawn / nano-spawn / execa against the hand-rolled Windows binary resolution and cmd.exe mediation that epic #3411 Phase 1 (PR #3621) is landing in the platform seam. Verdict: stay hand-rolled, with revisit-if conditions recorded so the call is not re-litigated in a future PR. Evidence, per the issue's "Done when" list: - Sync/async verdict per candidate. nano-spawn is async-only — settled by its own README, which lists "synchronous execution" among the features execa has and it does not. cross-spawn exposes `.sync`. execa exposes execaSync, which its own docs discourage. - CVE-2024-27980 escaping verdict per candidate. None uses shell:true. cross-spawn independently arrives at the SAME mechanism the seam uses: cmd.exe /d /s /c with a pre-escaped line and windowsVerbatimArguments. That validates the seam's approach rather than superseding it. - Maturity axes scored with measured data (registry metadata 2026-08-18, transitive footprint measured by install). Two premises in the issue did not survive measurement, both recorded: - The CRITICAL 167-symbol/53-file blast radius is a `direction:both` measurement, inflated by downstream callees. A call-shape change ripples to CALLERS: upstream at depth 15 is 14 symbols / 7 files, MEDIUM, and it terminates at depth 4. The decision does not rest on the CRITICAL figure. - The cited vendoring precedent path does not exist; the real one is gsd-core/bin/lib/vendor/re2js.cjs. Decisive against the only structurally-eligible candidate (cross-spawn): it resolves process.cwd() first on Windows even when an explicit PATH is supplied, calls process.chdir() during resolution, and keys escape depth on a node_modules/.bin/*.cmd path regex of the same shape #3411 was filed to delete. Adoption would also break execTool's observable not-found contract across 53 dependent files. Doc-only: docs/adr/** plus a root-level CONTEXT.md pointer. The CONTEXT.md addition is a new line rather than an edit to the seam's glossary paragraph, which PR #3621 rewrites wholesale — same-line edits would conflict on merge. ADR index regenerated via scripts/gen-adr-index.cjs --write. lint:ci exit 0; lint-docs-required and changeset/lint both run with GITHUB_BASE_REF=next and report ok_no_user_facing_changes. Closes #3625 Co-authored-by: sim <sim@local> Co-authored-by: Claude Opus 5 <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, 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.