cad70f4f3e
* fix(#4120): replace shellcheck npm dep with dependency-free downloader The `shellcheck` devDependency (added in #4109) pulled in decompress@4.2.1 for archive extraction, which carries an unpatched CRITICAL zip-slip vulnerability (GHSA-mp2f-45pm-3cg9, CVSS 9.1) plus two moderate findings. decompress's latest published version IS the vulnerable one -- no patched release exists upstream, so npm audit fix cannot resolve this by upgrading. Removes the shellcheck package entirely and replaces its role with scripts/lib/shellcheck-fetch.cjs: a small downloader using only Node's built-in https/zlib plus a hand-written tar-entry reader, fetching a pinned koalaman/shellcheck release directly from GitHub releases. The reader never uses an archive-supplied name as a filesystem path (the exact defect class decompress had) -- it only returns the matched entry's bytes; the caller writes those bytes to a path it constructs itself. Bounds the download with a 30s-per-hop timeout, consistent with the ShellCheck subprocess's own timeout. Covers linux/darwin on x86_64/aarch64, matching this repo's actual CI (lint-tests runs only on ubuntu-latest) and local dev needs; Windows fails with a clear, honest error rather than silently misbehaving. Adds tests/lint-workflow-shellcheck-fetch.test.cjs covering the tar-parser (unit cases plus a fast-check property test per CLAUDE.md's parser-testing requirement), a security behavioral pin confirming traversal-style entry names are treated as opaque strings never filesystem paths, and boundary coverage for the redirect-following logic's MAX_REDIRECTS limit (limit-1/limit/limit+1, via an injectable transport, no real network I/O). npm audit: 0 vulnerabilities (was 1 critical + 5 moderate). The lint script reproduces the identical result against the current tree: "212 pre-existing finding(s) from baseline, 0 new" -- no behavior regression, no baseline changes needed. * fix(#4120): register shellcheck-fetch.cjs with the installer scripts/lib/shellcheck-fetch.cjs shipped without being added to GSD_SCRIPTS_LIB_FILES in bin/install.js, which would have left it orphaned on uninstall and broken the golden install-tree fixtures for every runtime. Adds the entry and regenerates the 19 affected fixtures via npm run gen:install-tree. * docs(#4120): add changeset for the decompress CVE fix --------- 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.