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* test(#3304): add failing-first suite for the convergence evidence gate Content-assertion suite for the Step 7 re-verification evidence gate (agents/gsd-verifier.md / gsd-core/references/verifier-evidence-gate.md). Committed before the implementation to prove RED via gsd-test. * enhance(#3304): gate re-verification blockers on deterministic evidence Step 7's anti-pattern scan re-runs at full, unbounded scope on every re-verification pass, independent of the must-haves established in Step 2. A blocker it finds — other than the self-evidencing debt-marker check — previously reverted a completed gap-closure round and started another --gaps cycle on nothing more than the verifier's own new judgment call, with no bound on how many times that could repeat. A Step 7 blocker now blocks unconditionally in re-verification mode only if it is a carried-forward gap (present in the prior VERIFICATION.md's gaps: list) or the flagged file was git-modified since the prior pass (a regression; fails closed toward blocking when history is unresolvable). Otherwise it predates the gap-closure round unflagged and needs deterministic evidence — a named test run red, or another concrete reproducible artifact — to stay blocking. Unevidenced, it downgrades to a new advisory: frontmatter list and report section instead of setting status: gaps_found, and never reverts a completed must-have. Maintainer approval was narrowed to this evidence condition only, explicitly rejecting the broader "advisory whenever untraceable to a requirement/decision/prior-gap" proposal — implemented and pinned by tests/verifier-evidence-gate.test.cjs and documented as rejected in gsd-core/references/verifier-evidence-gate.md so it can't silently re-expand. Closes #3304 * fix(#3304): correct window-truncation and indentation bugs in evidence-gate tests gsd-test's GREEN checkpoint caught 3 real bugs in the test file itself (not the production prose): a {0,600} match window was shorter than the 724-char paragraph it was scanning (the "exclude from Step 9 Rule 1" phrase starts at offset 662), and two regexes assumed no indentation after a markdown list-continuation line break. All three phrases are confirmed unique across agents/gsd-verifier.md, so the windowed submatches are replaced with direct whole-string assertions instead of just widening the window. Also acknowledges the deliberate byte growth in agents/gsd-verifier.md that the differential-attribution check (ADR-2719) correctly flagged. Emitted-Drift-Ack-Growth: gsd-verifier.md — adds the #3304 re-verification evidence gate (Step 7 rule, Advisory bucket, advisory: frontmatter, report section); 1488 bytes, still within the LARGE-tier 48 KiB cap (48751/49152). * docs(#3304): backfill changeset PR number --------- Co-authored-by: sim <sim@local>
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.