2981983bae
* fix(#973): add Edit to gsd-planner tools and forbid whole-file Write of ROADMAP.md gsd-planner shipped Write but not Edit — the same writer-agent gap fixed for six agents in #571/#581. Without Edit, an in-place ROADMAP update fell back to a whole-file Write that truncated committed milestone history (292→16 lines in a real incident). Changes: - agents/gsd-planner.md: add Edit to tools: frontmatter (adjacent to Write) - agents/gsd-planner.md: update_roadmap step now directs Edit (scoped), with an explicit blocking prohibition on whole-file Write of ROADMAP.md or any existing curated .planning/ file - agents/gsd-planner.md: Write contract section clarifies Write is authorized only for net-new PLAN.md creation; existing files must use Edit - tests/agent-frontmatter.test.cjs: extend SECTION_WRITER_AGENTS list (#581 test) to cover gsd-planner — fails before fix, passes after - .changeset/973-gsd-planner-edit-tool.md: Fixed changeset, pr:0 Closes #973 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * chore(#973): backfill changeset pr number (989) * fix(#973): trim gsd-planner.md prose under agent size cap (keep Edit + scoped-Edit-for-ROADMAP rule) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> --------- Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Claude Sonnet 4.6 <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, 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, Gemini 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, Gemini 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 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.