a987cf2731
* chore(#2932): emit a per-invocation section manifest from init Extends the init bundle with a typed per-invocation section manifest so an invocation loads only the branch guidance it will actually take. The three flag/state-gated branches in execute-phase.md move into their own step files; the parent keeps its gsd:section markers wrapping a one-line on-demand reference, so each section's prose lives in exactly one file and the parent shrinks 93369 -> 89507 bytes. A new drift-guarded generator derives the shipped section manifest from those markers, and a new pure evaluator maps invocation facts to applicable section ids. The evaluator is a lookup over the frozen WHEN_VOCABULARY, never a parser (Greenspun's Tenth Rule, ADR-1671:69); a parity test asserts the vocabulary and the predicate map stay exhaustively in sync. Closes #2932 * fix(#2932): fail closed on prototype-chain when values An isolated adversarial review found WHEN_PREDICATES[section.when] was a bracket lookup on a plain-prototype object, so inherited Object.prototype members resolved as predicates: "constructor"/"toString"/"valueOf"/ "hasOwnProperty" returned truthy and SILENTLY INCLUDED the section, and "__proto__" threw an untyped TypeError carrying no .reason. Both violate the module's documented fail-closed contract, and the manifest is read from disk at run time so it cannot be assumed trustworthy. Builds the predicate map on a null prototype and guards the lookup with an explicit Object.hasOwn check. Adds table-driven coverage for nine Object.prototype-shaped keys asserting the TYPED reason (asserting only that it throws would still pass while broken) plus a fast-check property injecting a hostile value at an arbitrary document position. * test(#2932): retarget execute-phase step assertions at extracted step files * fix(#2932): emit typed reasons for generator lib-load and write failures * fix(#2932): restore launcher preamble in extracted steps and refresh derived fixtures * chore(#2932): backfill changeset pr number to 2987 --------- Co-authored-by: sim <sim@local>
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.