d1760e3c31
Replaces cmdValidateHealth's hand-rolled addIssue/switch accumulation
(961 lines) with buildPlanningSnapshot -> evaluateRules -> map to the
legacy {code, message, fix, repairable} shape, bucketed by severity.
Two pre-checks (home-dir E010/I010, .planning/-root-missing E001) stay
outside the rule table entirely, per ADR-3180 §8.2 rule 4 ("no
precedence system") — building "some rules suppress others" into the
table would itself be the forbidden precedence system.
W024 (STATE.md commit-age freshness) also stays outside the table:
its committed rule is a documented permanent no-op (readStateHeadFreshness's
git-log shell-out is ambient I/O a Rule.check may never perform, and no
PlanningSnapshot field carries a commits-behind count). Migrating onto
the rule table as designed would have silently regressed 7 passing
tests in tests/health-validation.test.cjs — found while wiring this
function, kept as a real check in the wrapper instead (same I/O
license applyRepairs already relies on), fixed inline per this repo's
no-defer policy rather than accepted as a silent loss.
Ports the real repair-handler bodies (createConfig/resetConfig,
regenerateState, addNyquistKey/addAiIntegrationPhaseKey,
backfillMilestones) into health-diagnostic.cts's applyRepairs,
replacing the skeleton's stub. DESTRUCTIVE-risk remedies
(resetConfig/regenerateState) are refused by --repair — a disclosed
breaking change; repairable now means "an automatic repair will
actually run," not merely "a remedy exists to describe," so E004/E005
now report repairable:false. --backfill alone now actually triggers
backfillMilestones, fixing a latent bug where its gate was unreachable
without --repair also being set (verify.cts:2504, confirmed dead code
pre-migration).
Test updates distinguish the two explicitly-authorized behavior
changes (DESTRUCTIVE refusal, backfill-alone fix, W021->W026 split)
from preservation — every changed assertion is commented with why, and
new regression tests were added for both changes plus W021/W026
mutual independence. Drift-guard bookkeeping (bypass-baseline shrunk
to the one disclosed W024 exception, milestone-window and
phase-enumeration exemptions, test-file-count allowlist) updated for
the relocated/new functions this migration introduces.
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.