b38ae41243
* fix(#619): resolve gsd-tools via runtime shim in codebase-drift-gate The post-execution drift check ran the bare PATH binary `gsd-tools verify codebase-drift`. On a shim-only install (gsd-tools.cjs present, `gsd-tools` not on PATH) that exits 127, `2>/dev/null` hides it, and the `|| echo` fallback marks the gate skipped — so codebase-drift detection silently never runs. Non-blocking by contract, so nothing surfaced; it just quietly stopped working. Resolve gsd-tools through the runtime shim launcher (gsd_run) instead. The canonical launcher preamble is now defined once in the always-run drift-check block (the file's first gsd_run block); the conditional auto-remap block reuses gsd_run from the workflow's shared shell scope, keeping the file compliant with the single-canonical-preamble parity invariant (tests/runtime-launcher-parity.test.cjs). This is the same single-preamble pattern established by discuss-phase (#614). Non-blocking is preserved for the drift command's internal failures via the unchanged `|| echo '{"skipped":...}'` fallback. Scope decision (the issue's open question): workflow step-file bash blocks share one shell scope, so the preamble is defined once before the first gsd_run call — matching discuss-phase and enforced by the parity test. Regression test (bug-619-...): contract assertions (gsd_run not bare gsd-tools; single preamble in the drift block; fallback intact) plus a behavioral proof that runs the shipped drift-check block against a shim-only topology and asserts the shim actually executes where the old bare-binary form would have skipped. Red→green verified. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * chore(#619): add changeset for codebase-drift-gate shim fix 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.
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A light-weight meta-prompting, context engineering, and spec-driven development system for Claude Code, OpenCode, Gemini 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, 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, 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.