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* test(#3348): add failing-first coverage for the context-drift gate * feat(#3348): add context-drift pre-check gate for plan-phase Compares each phase's *-RESEARCH.md/*-PATTERNS.md/*-VALIDATION.md/*-SPEC.md effective last-changed time (git commit time, falling back to mtime for uncommitted edits) against *-CONTEXT.md's, so plan-phase no longer silently reuses an upstream artifact that predates a decision added to CONTEXT.md after that artifact was derived from it. Deterministic, no model call. New `gsd_run verify context-drift <phase>` command, sibling to the existing verify.codebase-drift/verify.schema-drift gates in the drift capability. Warn-only by default (workflow.context_drift_precheck), with an opt-in workflow.context_drift_action: block escape hatch. Wired at plan:pre in plan-phase.md, before both the RESEARCH.md and PATTERNS.md reuse decisions. * fix(#3348): address code-review findings — raw-text-match, stale comment, import placement, duplicated phase resolution * fix(#3859): pin the real commit's diff.ignoreSubmodules to match the empty-diff probe The #3859 empty-diff guard decides whether a submodule bump would land using `--ignore-submodules=dirty`, overriding the caller's `diff.ignoreSubmodules` config. The real `git commit -- <paths>` that follows was never given the same override, so under a bare `diff.ignoreSubmodules=all` repo config the two calculations disagree: driven on git 2.39.5 (Debian bookworm, the linux-node24 test-matrix image), the guard correctly stands aside but the scoped commit itself then silently fails (exit 1, no error text) for a gitlink bump it had just confirmed would be recorded, surfacing as commit_failed instead of committed:true. Pin `-c diff.ignoreSubmodules=dirty` onto the scoped commit call too, so the probe and the commit it protects can never diverge. Harmless when no submodule path is involved (driven: identical outcome on an ordinary scoped file, with and without the flag). * fix(#3348): guard resolvePhaseDirByToken's exact-match fallback against path traversal * fix(#3348): retarget phase-enumeration-drift exemption to the consolidated resolvePhaseDirByToken helper cmdVerifySchemaDrift's inline readdirSync was already function-scoped-exempt in lint-phase-enumeration-drift.cjs as a single-phase LOOKUP (not a current-milestone enumeration). This PR's refactor pass lifted that block into a shared helper, resolvePhaseDirByToken, also used by the new cmdVerifyContextDrift — the guard tracks exemptions by enclosing function name, so the readdirSync now lives in an unexempted function and started firing. Move the exemption to resolvePhaseDirByToken (same written reason, now covering both callers) instead of migrating to listAllPhaseDirs, which would introduce two real behavior deltas here: it catches readdirSync failures internally (old code let them throw) and sorts results by phase number before matchPhaseDirs picks matches[0] (old code used raw, OS-dependent readdirSync order). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3348): satisfy lint:ci — slash form, capability registry regen - docs/features/context-drift-gate.md used the deprecated /gsd: colon form; docs are never passed through the install-time slash-form converters, so lint-docs-command-form requires the hyphen form. Regenerated docs/FEATURES.md from the corrected fragment. - Regenerated gsd-core/bin/lib/capability-registry.cjs after editing capabilities/drift/capability.json (lint:generated-sync). * fix(#3859): pin the real commit's diff.ignoreSubmodules via env, not argv -c The prior fix pinned `-c diff.ignoreSubmodules=dirty` onto the scoped commit's argv via `commitArgs.unshift(...)`. `-c key=val` must precede the `commit` subcommand, so this shifted `commitArgs[0]` from `'commit'` to `'-c'` for every scoped commit call, breaking 17 position-based assertions in the commit-files pathspec regression suite that read `a[0] === 'commit'` to find the commit invocation among recorded git calls. `execGit` already accepts an `env` option merged onto `process.env` before spawning. Git honors `GIT_CONFIG_COUNT`/`GIT_CONFIG_KEY_0`/`GIT_CONFIG_VALUE_0` as a per-invocation config override functionally identical to `-c key=val`, expressed via env instead of argv. Passing that env alongside the existing commitArgs (still `['commit', ..., '--', ...stagedPaths]`, argv unchanged) fixes the real commit's effective diff.ignoreSubmodules to match the empty-diff guard's probe without moving anything in argv position 0. Scoped to exactly the canScope branch, matching the probe's own preconditions and leaving no behavior change for commits the probe never evaluated. No test file changes needed — the 17 previously-failing assertions test argv[0] against the array passed into execGit, which never changes. * fix(#3348): register verify-context-drift in the check subcommand router The drift capability's new plan:pre gate declares check.query "verify.context-drift", which normalizes to `check verify-context-drift`, but no such subcommand was routed — phase6-capstone-conformance's uniform-block-field test failed with "Unknown check subcommand" for every declared gate query. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3348): extend #1592's exact-key-list snapshot for the new context-drift config keys tests/capability-registry.test.cjs asserted an exact, hardcoded snapshot of the drift capability's config keys. #3348 legitimately adds two new keys (workflow.context_drift_precheck, workflow.context_drift_action) for its own plan:pre context-drift gate — extend the expected set (and clarify the assertion message) without weakening the test's exactness. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3348): reconcile E2's exemption-migration pin with the resolvePhaseDirByToken extraction #3348 (an earlier commit on this branch, e4b80ad81) extracted cmdVerifySchemaDrift's inline phasesDir readdirSync/matchPhaseDirs block into the shared resolvePhaseDirByToken helper (also used by the new cmdVerifyContextDrift), and retargeted lint-phase-enumeration-drift.cjs's function-scoped exemption from cmdVerifySchemaDrift to resolvePhaseDirByToken accordingly — cmdVerifySchemaDrift no longer contains a line the guard's detectors match, so it needs no exemption. tests/phase-locator.test.cjs's E2 test still pinned the exemption to the old name (cmdVerifySchemaDrift), unaware of the migration. Update E2 to match the same "migrated call site's exemption must move, not duplicate" pattern the test already applies to cmdRoadmapAnalyze and cmdInitMilestoneOp just below it: drop cmdVerifySchemaDrift from the still-exempt list and add symmetric assertions that it no longer carries the exemption while resolvePhaseDirByToken now does. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3348): fix two self-contradicting/nondeterministic tests in context-drift.test.cjs 'always exits 0 (query command contract)' included the no-phase-arg case, which contradicts the file's own earlier 'errors with usage message on missing phase arg' test (that case legitimately exits 1 via the Usage error) — drop it from the always-exits-0 cases. 'degrades to mtime comparison outside a git repo' and '...in a repo with no commits' relied on real wall-clock ordering between two back-to-back writeFileSync calls to prove CONTEXT.md is newer than RESEARCH.md; on a fast filesystem both can land in the same mtime tick, producing a tie that computeContextDrift's strict `<` correctly treats as not-stale, so stale_artifacts comes back empty. Make both tests deterministic via explicit fs.utimesSync instead of relying on timing (CONTRIBUTING.md: never assert elapsed wall-clock time). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3348): add context_drift_precheck:false to the plan:pre all-off fixture The "all plan:pre when-keys false" fixture explicitly disables every known workflow.* plan:pre toggle, but didn't yet know about the new workflow.context_drift_precheck key (defaults to true), so the new drift context-drift gate stayed active and broke the empty-activeHooks assertion. Emitted-Drift-Ack-Growth: plan-phase.md — adds the #3348 context-drift plan:pre pre-check section (new ## 4.6); this PR's own diff, not incidental drift. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(#3348): backfill changeset PR number (pr:0 -> 4147) --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Sonnet 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.