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* test(#3184): failing-first milestone-window single-owner suite Covers the 50 input classes in the phase test matrix: scope classification (genuinely-empty vs truncated vs unscoped vs unreadable), the section-end owner's level boundaries, consumer-output identity per ADR-3180 Decision 4(c), the milestone.complete refusal with negative proof that no directory moved, the version-token boundary defect, drift-guard behavior, and three fast-check properties over document-shaped generators. Committed alone so the remote runner records the failure before the fix lands. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 * refactor(#3184): milestone windowing routes through one owner Three copies of the milestone section-end walk lived in roadmap-parser.cts — two distinct computeSectionEnd function nodes plus an inline third in getMilestonePhaseFilter's versionOverride branch. computeMilestoneSectionEnd is now the sole owner and the other two are deleted, not kept in sync by comment. The whole-repo drift guard found what the epic did not: state.cts held three more re-derivations of the same vocabulary — two byte-identical milestone bounding checks carrying a defect neither reported copy has (no boundary after the version token, so v2.0 matched inside v2.0.1), and a milestone-sectioning predicate. All three route through the owner now. A composition-level duplicate appeared inside this change's own first pass: getMilestonePhaseFilter and cmdMilestoneComplete each re-assembled a window out of the owner's primitives, and had already diverged on whether to skip a closed milestone heading. sliceMilestoneWindow is the one composition. Windows now carry the ADR-3180 SCOPE discriminator, so a truncated window is distinguishable from a genuinely empty milestone — those were output-identical, which is the whole failure class. roadmap analyze emits it (#3165), and milestone complete refuses to archive on anything but COMPLETE rather than pass-all moving every phase directory on disk (#3166). The pass-all degrade is preserved where its premise holds: making the filter deny-all would trade a silent over-inclusive answer for a silent under-inclusive one on the read paths that count with it. extractCurrentMilestone keeps its signature — 200+ affected symbols across 41 files and 25 process flows — and is a one-line wrapper over the scoped owner. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 * fix(#3184): fence-aware phase detection and one heading-selection owner Review fixes from the two orthogonal passes. The blocker: hasPhaseEntries matched ATX phase headings fence-aware via tokenizeHeadings but tested the #2199 bullet form against un-stripped markdown, so a fenced EXAMPLE of the bullet syntax counted as a real phase. A genuinely empty milestone then classified TRUNCATED and milestone complete refused a legitimate archive — a false positive in the destructive direction, worse than the defect this phase set out to fix. Both that path and getMilestonePhaseFilter own pre-existing bullet scan now run on stripFencedCode, since leaving one meant the owner file gave two different answers to the same question. The selection rule — locate, prefer the non-closed heading, else the first — had been written three more times inside the file whose thesis is single ownership. selectMilestoneHeading owns it; all three sites route through it. The copies were behaviorally identical, so this is de-duplication with no observable change, verified by probing that all three paths select the same heading. roadmap analyze emitting a scope no consumer read left #3165's actual symptom alive, so Route 0 in next.md now treats a non-complete scope as scan-failed rather than as a clean empty scan, and the ADR amendment no longer overstates what shipped. Also: the scope refusal moved above the archive-directory create, so a refusal leaves nothing on disk; the versionOverride comment names all four consumers; COMMANDS.md documents the new guard beside its sibling. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 * test(#2658): exclude the changelog from the malformed-path scan The gate walks every emitted .md/.js/.cjs file in an installed tree and asserts none contains `.claude/.trae/rules` or `.trae/.trae/rules`. CHANGELOG.md ships into that tree, and its #2658 entry quotes both malformed paths while describing the fix that removed them — so the release note documenting the fix trips the fix's own regression test. Red on next before this branch. The installer is correct: a probe over a real --trae --local install found 621 emitted files, exactly one hit, and it was gsd-core/CHANGELOG.md. The scan scope was the defect, not the product. Excluded by exact relative path rather than by loosening the patterns or skipping all markdown — the emitted agent and command markdown is precisely what #2658 was about, so the gate stays strong everywhere it matters. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 * test(#3184): regenerate install-tree fixtures for the shared drift scanner scripts/lib/ ships in the npm package and installer, so extracting the shared tree-walk into scripts/lib/drift-scan.cjs adds one path to every runtime's install tree. Regenerated via npm run gen:install-tree; the delta is exactly that one path per fixture. The two drift guards themselves do not ship (scripts/lint-*.cjs is excluded), so only the extracted library moves. This matches the existing scripts/lib/allowlist-ratchet.cjs precedent, which is likewise a lint-only helper carried in the shipped tree. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 * fix(#3184): restore the #730 sub-milestone boundary and narrow the refusal The remote runner caught two regressions this branch introduced. Both were mine, and neither review pass found them — only running the existing suite did. The version-token boundary. I replaced locateMilestoneHeadings' \b with (?![\w.-]), reasoning that v2.0 matching inside v2.0.1 was the same defect #2562 fixed in isMilestoneShippedInRoadmap. It is not the same question. A milestone state of v8.0 legitimately selects the '## v8.0-B' sub-milestone section over a closed v8.0-A sibling (#730), and \b is what allows it while the stricter boundary forbids it — nine tests in roadmap-phase-fallback said so. Reverted to \b; the state.cts consolidation is now a straight merge with no behavior change, and the v2.0/v2.0.1 ambiguity is left exactly as it was. The ADR amendment and the design doc no longer claim otherwise. The refusal scope. I refused whenever the window was not COMPLETE, but #3166 is about the TRUNCATED window specifically — the heading is found and the section closes before the phase region, so pass-all archives everything. UNREADABLE and UNSCOPED are pre-existing, legitimately handled states, and refusing on them broke 'handles missing ROADMAP.md gracefully' and three archive tests. Narrowed to TRUNCATED; docs corrected to match. One of the new tests was also wrong: its fixture gave the shipped and current milestones' phases the same numeric id, and the filter matches on that id, so it could not have distinguished the two windows. Fixture corrected to exercise what it claims to. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 * fix(#3184): enumerate drift-scan.cjs for uninstall The installer copies scripts/lib/ wholesale, but uninstall removes an explicit set — deliberately, so a user's own helpers in that directory survive. The extracted drift-scan.cjs was copied in and never enumerated, so it outlived uninstall, left the directory non-empty, and the rmdir that follows failed. Added to GSD_SCRIPTS_LIB_FILES, following allowlist-ratchet.cjs, which is likewise a lint-only helper that ships there and is enumerated. Verified with a real install-then-uninstall into a temp target: scripts/lib/ held exactly the three GSD files and was gone afterwards. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 * test(#3184): assert install and uninstall agree on scripts/lib and scripts/changeset Found while shipping this phase, and fixed here rather than noted. install() copies scripts/lib/ and scripts/changeset/ into the target WHOLESALE — the comment at the copy site literally says "and any future lib helpers". uninstall() removes them by hardcoded enumeration, deliberately, so a user's own helpers in those directories survive. A wholesale writer paired with an enumerated remover cannot stay in sync by construction: any file added to either directory ships to every user and is then orphaned in their repo forever, since it survives uninstall, leaves the directory non-empty, and the rmdir that follows fails. Nothing reported this. 31,225 tests were green over it. That is the same divergence class this epic exists to delete, sitting in the installer, so it gets the same remedy CLAUDE.md prescribes for it: a parity assertion that fails the moment the two surfaces disagree. The test compares each directory's real contents against its enumeration and names the offending file plus the constant to add it to. Both enumerations are hoisted to module scope and exported, so the test asserts on the actual arrays rather than pattern-matching the installer's source — no allow-test-rule annotation needed. Proven non-vacuous both ways: empty diff on the current tree, correct report when an unenumerated file is injected. scripts/changeset/ turned out to carry the identical defect and is covered too. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 * chore(#3184): backfill changeset PR number Also narrows the wording to match the shipped behavior: the refusal fires on a truncated window specifically, not on any non-complete scope. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015kfkRFNUESoBspUYcAQaT3 --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Opus 5 (1M context) <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.