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* feat(#1188): promote no-source-grep to error on tests/** Apply local/no-source-grep as an error to tests/**/*.test.cjs (was warn on bin/scripts only). Only 2 real violations surfaced (repo-layout.test.cjs structural guard-placement checks on bin/install.js) — marked allow-test-rule with #1188 reason. PART A (branch-coverage floor) follows separately. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * feat(#1188): add c8 branch-coverage floors (60 global, 70 per-file on UNMUTATED modules) c8 enforced line floors only. Add a --branches 60 global floor (current ~82.5%, margin mirrors the lines-70-vs-91% gap) to test:coverage + test:coverage:unit, plus a chained 'c8 check-coverage --per-file --branches 70' for the high-risk UNMUTATED modules state/phase/verify/init (current min 78.3% on verify). The per-file check reuses the coverage data the suite run just produced (the proven scripts-floor pattern) so it adds no second suite run. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * fix(#1188): per-module branch check must pin lines/funcs/stmts to 0 Standalone 'c8 check-coverage' defaults unspecified metrics to 90 and enforces them, so --branches 70 alone also failed on lines (verify.cjs 85.29% < default 90). Pin --lines 0 --functions 0 --statements 0 so only the branch floor (70) is enforced on the UNMUTATED modules. Data-reuse confirmed working (it computed verify's real %). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.8 <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, Gemini 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, Gemini 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, Gemini 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 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.