bbc3f131be
Satisfies #4653 DW1 and DW9, which were the phase's outstanding acceptance criteria: every other implementation must be deleted or route its containment DECISION through the canonical predicate, and no surviving wrapper may decide WHETHER a path is contained. Three implementations were being retained with their own comparisons, on the argument that each needs LEXICAL resolution — a realpath-based predicate is the wrong tool wherever a symlink must be preserved rather than resolved. That argument is correct about RESOLUTION and was being used to justify owning the DECISION too. Those are separable, and separating them is what closes the criteria honestly rather than by reinterpretation. isContainedIn(resolvedTarget, resolvedRoot, pathImpl?) module-internal is now the single place this repo decides containment. It is separator-aware, so a sibling merely sharing a prefix (`<root>-evil` against `<root>`) is still rejected. Two exported families sit on it and differ ONLY in how a candidate is resolved before the decision: assertWithinRoot / tryWithinRoot realpath-resolving assertWithinRootLexical / tryWithinRootLexical path.resolve only, no I/O The lexical pair carries `opts.pathImpl`, so win32 separator semantics stay testable off Windows — that seam already existed in isPathConfined and would have been lost by a naive collapse. The three call sites now take their decision from the predicate and keep only what is genuinely theirs: external-descriptor-trust isPathConfined delegates outright; pathImpl forwarded installer-migrations ensureInsideConfig delegates; keeps its own message and its LEXICAL fullPath, which callers consume for existsSync and journal rows gsd-tools.cjs isInsideDir delegates; keeps its own `target !== root` condition, and the separate symlink refusal above it stands DW5 is not weakened by this. That criterion binds the symlink oracle and the ancestor canonicalization; both are untouched. The only change inside validatePath is three comparison lines becoming one call, and the rejection string `Path escapes allowed directory: <resolved> is outside <base>` stays byte-identical because it is an observable CLI contract. What this does NOT do, stated plainly: the lexical family still cannot see a symlink. That is a property of lexical resolution, not a gap in the seam, and the three callers that need it are the three that must pair it with their own symlink refusal — which is exactly what the fix earlier in this phase added at the install sites. The doc comment says so at the definition, and CONTEXT.md and docs/explanation/security-model.md are corrected: they previously described these three as deliberately NOT routed through the predicate, which is no longer true. Co-Authored-By: Claude Opus 5 <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, 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.