8249ebcf6e
* test(3770): add failing tests for intentional RED evidence gate RED: classifyRedEvidence / buildRedEvidenceRecord / check tdd-red-evidence do not exist yet; every row fails on require. Per #3770 only an intentional target-test failure may authorize GREEN; zero-test discovery, fixture crashes, unrelated failures, and unexpected green are INVALID_RED. * fix(3770): require intentional RED evidence before GREEN Only an intentional failure of the TARGET test (distinctly named, TAP-reported assertion failure) classifies as RED_EVIDENCE_OK and authorizes GREEN. Zero-test discovery, fixture/load crashes (file-named failures), nonzero exits without a failing test, unrelated failures, unexpected greens, and malformed/missing records are INVALID_RED and block GREEN. - src/tdd-red-evidence.cts: pure classifier + persisted record builder (reuses the prohibition-enforcement TAP primitives; fail-closed, never throws) - check tdd-red-evidence <record.json>: validates the persisted record (command, exit code, failing test, expected, actual) - gsd-executor.md / references/tdd.md / references/execute-mvp-tdd.md: RED now requires the evidence record + gate verdict, not a nonzero exit or a RED: tag * chore(3770): regenerate inventory manifest for tdd-red-evidence.cjs * fix(3770): fit executor fail-fast under size cap, fix unrelated-failure fixture, ignore generated lib - gsd-executor.md: compress the #3770 fail-fast rule to one line (49149 B < 49152 cap; line-count parity keeps the #2751 PROSE_ALLOWLIST line 816 valid) - tests: the row-6 fixture used String.replace (first-occurrence), so the `not ok` line still named the target test and the classifier was right to accept it; replaceAll makes the failure genuinely unrelated - eslint.config.mjs: ignore tsc-generated bin/lib/tdd-red-evidence.cjs (lint the src/*.cts source, per ADR-457 migration rule) Emitted-Drift-Ack-Growth: gsd-executor.md — the #3770 fail-fast rule now requires intentional RED evidence (check tdd-red-evidence) before GREEN; +172 bytes, kept under the LARGE cap and on one line * chore(3770): add changeset * chore(3770): backfill PR number in changeset --------- 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.