c7956c162b
The verification checkpoint caught a real design gap, not a flaky test. Confining sourcePath/targetPath within todosRoot correctly rejects `../../escaped`, which leaves the root. It does NOT reject these, because they all land inside it: ../sibling.md -> <todosRoot>/sibling.md escapes pending/, not the root a/../../b.md -> <todosRoot>/b.md same sub/name.md -> <pendingDir>/sub/name.md inside pending/, but nested Three committed tests asserted these must be rejected and were right: the design says "a todo name is a basename, not a path", and #4327 requires the resolved path stay inside "the todos root (pending and completed subdirs)". Containment against a root is structurally incapable of expressing "basename" — it answers "is this inside?", and all three are. The wrong tool was reaching for the wrong question. A basename guard now runs BEFORE any path is joined: reject on a `/` or `\` separator, on a path.basename / path.win32.basename mismatch, on `.` / `..`, and on a NUL byte. Both separators are checked explicitly because on POSIX a literal backslash is an ordinary filename character to path.basename but not to path.win32.basename or to the user's intent — this repo has a documented bug class for exactly that asymmetry. Same predicate shape as findPhaseArtifact in check-command-router.cts, so the two agree. Containment is kept as defense-in-depth rather than replaced. The basename guard is the specific rule; containment is the backstop. Message wording matters here and is deliberate: `sub/name.md` does NOT escape its allowed directory, so reusing the escape message would have stated something false. It now says the name must be a plain filename, not a path. docs/CLI-TOOLS.md corrected again, in the opposite direction from last time. The previous revision said an absolute filename is "folded under the root" and 404s — true then, false now: the basename guard rejects it before any join happens. Two corrections to one paragraph in one phase is the cost of documenting behavior while it is still moving; the paragraph now matches the shipped code. Verified through the real CLI, not by calling the built function directly: all eight rejection cases produce the new USAGE message; `ok.md` still completes and moves to completed/; `missing.md` still gives "Todo not found". Also corrected the now-stale comment above the isFile() check — it described `.`/`..` reaching that line, which the basename guard now prevents. The check itself stays: a bare basename can still name a directory, FIFO or socket in pending/. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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.