b5ce72f729
* fix(2119): single SECURITY.md writer — auditor is return-only The gsd-security-auditor held Write/Edit and was instructed to write SECURITY.md (no <N>- prefix, no template frontmatter), while the orchestrator's Step 6 also wrote the correct padded <N>-SECURITY.md from templates/SECURITY.md. Two writers, two naming conventions, two shapes — the auditor's unprefixed file was invisible to the workflow's *-SECURITY.md glob detector and unparseable for the threats_open gate. Fix (option 1 from the issue): make the auditor return-only. - Remove Write/Edit from auditor's tools - Rewrite all 'Write SECURITY.md' instructions to 'Return structured verdict' with threats_open count - Add explicit constraint in workflow Step 5 spawn prompt - Update existing test (was asserting Write in tools — now asserts absence) - Add new regression test for single-writer contract - Update docs/AGENTS.md stale Tools/Produces rows - Regenerate golden fixtures + agent size baseline * docs(changeset): backfill PR number (#2154) * chore(#2119): regenerate pi/qwen golden fixtures after next merge The single-writer change edits gsd-core/workflows/secure-phase.md and agents/gsd-security-auditor.md; pi.json (added on next) and qwen.json (merge straggler) were the only runtime fixtures still holding pre-change hashes for those files. All other runtimes already reflect the change. Regenerated via the sanctioned gen-golden-install-parity script. * merge origin/next — regenerate goldens + baseline for merged state * fix slash-command syntax: /gsd-secure-phase → /gsd:secure-phase (#2154 CI fix)
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
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.