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* fix(#4267): correct tdd.md pointer citations; fix(#4269): collapse plan-level gate-rule duplication execute-plan.md and gsd-executor.md each cited "Red-Green-Refactor Cycle" for three facts (commit-scope contract, fail-fast rule, error handling), but only the commit-scope contract lives there. Fail-fast is in tdd.md's "Fail-Fast Rules" subsection (under "Gate Enforcement Rules") and error handling is in tdd.md's "Error Handling" section — cite each correctly. gsd-executor.md's "Plan-Level TDD Gate Enforcement" section also fully restated the gate-sequence rules tdd.md's "Gate Enforcement Rules" already owns (and covers more thoroughly, including the actual git-log validation script). Collapse it to a short pointer, matching the treatment already used by the cycle-steps pointer immediately above it. Adds tests/tdd-reference-correctness.test.cjs asserting the pointer text cites the correct section names, that those sections actually carry the guidance, and that the old gate-sequence restatement is gone from gsd-executor.md. Closes #4267 Closes #4269 * docs(#4267): add changeset for tdd.md pointer correctness fix Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * chore(#4267): acknowledge execute-plan.md growth execute-plan.md grew 95 bytes (39766 -> 39861) from the corrected three-section citation in the #3990/#4267 cycle-steps pointer. Emitted-Drift-Ack-Growth: execute-plan.md — net +95 bytes from citing the "Fail-Fast Rules" and "Error Handling" sections by name instead of a single mis-scoped section (#4267). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#4267): update PROSE_ALLOWLIST line numbers shifted by the pointer-citation edit This branch's edits to agents/gsd-executor.md and gsd-core/workflows/execute-plan.md shifted line numbers, leaving tests/no-bare-gsd-tools-command-position.test.cjs's PROSE_ALLOWLIST pointing at stale lines. Update both entries to their new correct lines (811 and 419 respectively) without changing the underlying prose. * fix(#4267): restore INVALID_RED citation, fix allowlist line shift after #3770 rebase The rebase onto next picked up #3770's already-merged fail-fast update to gsd-executor.md's plan-level gate section, which this branch's own commit collapses into a pointer. The conflict resolution kept the pointer but dropped the literal "INVALID_RED" term that tests/tdd-red-evidence.test.cjs requires gsd-executor.md to name — restored it. Also updates no-bare-gsd-tools-command-position.test.cjs's PROSE_ALLOWLIST line number for gsd-executor.md, shifted again by the rebase. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * test(#4267): fix non-matching regression-guard regex in tdd-reference-correctness The fail-fast regression guard asserted gsd-executor.md no longer contains "If a test passes unexpectedly during the RED phase" — but the actual old prose (removed by this branch's pointer-collapse) read "If a test passes unexpectedly during RED, STOP". The regex never matched the real old text, so the assertion would have passed even against the unmodified pre-change file. Caught by an isolated orthogonal review pass. Fixed to match the actual removed wording, and confirmed (via a direct grep) it is genuinely absent from the current file. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(#4267): backfill changeset PR number 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.