5e52350736
* test(#1958): add failing-first guardrail contract tests Epic #1957 Phase 1A. Adds source-text-is-the-product tests asserting the 5-signal fix-acceptance guardrail contract (target test, mutation check, no-op/deletion detector, adjacent tests, revert-and-reconfirm), graceful degradation, FIX REJECTED BY GUARDRAIL return path, per-signal debug-file recording, and subprocess bounding. Failing-first: reference file and agent sections do not yet exist. * feat(#1958): add multi-signal fix-acceptance guardrail to gsd-debugger Epic #1957 Phase 1A. Prevents accepting a fix that merely greens the test (Goodhart defense / APR overfitting). Adds a 5-signal gate run before fix acceptance: target test, mutation check (Stryker), no-op/behavior-deleting detector, adjacent/held-out tests, revert-and-reconfirm. Degrades gracefully when Stryker or a test suite is absent (each skip logged, never a silent pass), records per-signal results under Resolution.verification, and returns a FIX REJECTED BY GUARDRAIL outcome the session-manager surfaces for revise / accept-as-debt / abandon. Full rules extracted to gsd-core/references/debugger-fix-acceptance.md (slim routing kept in the agent to respect the agent-size cap). Debug template + INVENTORY + manifest + agent-size baseline + AGENTS.md updated. * test(#1958): correct newline-tolerant assertion + regen install-parity goldens The revert-and-reconfirm assertion collapsed whitespace before matching so markdown line-wrapping does not break it. Regenerated the golden-install-parity and install-tree fixtures (npm run gen:golden) to absorb the intentional gsd-debugger.md / gsd-debug-session-manager.md / DEBUG.md / new reference-file changes to the installed artifact tree. * fix(#1958): tighten guardrail per orthogonal review Addresses the isolated reviewer's findings: - signal 5 now states its recorded-repro dependency and routes the no-repro case to the degradation row; revert mechanism specified (git stash / git revert -n); minimality flag tied to diff structure, not revert-ability. - bounded-subprocesses section now bounds the git subprocess (5-30s) too, requires argv-array argument passing, and scopes Stryker to the driving regression test (a mutant killed only by a non-driving test is a finding). - new test-provenance (security) clause: the driving test must be agent-authored; bug-report repro scripts are DATA, never executed verbatim. - tightened 3 contract assertions to bind to specific clauses (guardrail_verdict field, deletion-reject-unless-RCA, 60s+git bounding). - Goodhart framing softened to 'partially-independent'; DEBUG.md template verification field notes the nested map shape. * chore(#1958): backfill changeset pr number (PR #2396) * fix(#1958): add issue ref to allow-test-rule annotation (ADR-456) CI lint-allow-test-rule-refs requires every allow-test-rule exemption to carry a 'see #NNN' issue ref per ADR-456. The new test file's annotation lacked it; this adds (see #1958).
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.