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* feat(#3414): promote git-cmd.js token-walk into a shared scanner, fix #3169 Phase 3 of epic #3212 (ADR-3212 §4). New src/token-scanner.cts generalizes hooks/lib/git-cmd.js's proven token-walk (#3129 — "has not re-opened"): tokenizeShellLike (quote-aware shell tokenizer, byte-identical port) and indentWidth (bullet-nesting depth). git-cmd.js migrates onto tokenizeShellLike with zero behavior change (parity-asserted against every existing #3129 fixture in tests/worktree-safety.test.cjs's folded block); isGitSubcommand's phases 1-3 (env-prefix skip, executable check, global-option consume) extracted into skipToSubcommand, shared with the new extractBranchArgument (git checkout -b / git branch <name>) — a new capability exercising the seam on the domain the ADR names, not a migration of existing duplicated logic (none existed). Fixes #3169: src/decisions.cts's parseDecisionLines couldn't distinguish a cross-reference bullet nested under an open decision from a fresh malformed declaration attempt. An earlier bold-run-content-classification design was tried and disproven against the repo's own existing FIX-B fixtures (D-02, "no colon no dash") before being adopted — both have identical shape under any content-only rule. Nesting depth (via indentWidth) is the actual distinguishing signal: a bullet indented deeper than the currently-open decision's own bullet is elaboration, folded into its text like a continuation line, never tested against the parse-miss guard. A bullet at the same-or-shallower indent is unchanged. Scope-narrowing disclosed, not silent: of the ADR's four named bugs (#3197, #3169, #2570, #2528), three no longer need this phase's work. were independently fixed and closed since the ADR was authored — #2570's fix is already a correctly-bounded regex per the ADR's own decidability test (no scanner needed); #2528's fix is a deliberate, twice-reviewed non-scanner design (its own code comment records a scanner-based attempt that regressed a symmetric case and was reverted) that this phase does not disturb. Only #3169 required new work. get_impact: isGitSubcommand CRITICAL/196 affected symbols, parseDecisionLines CRITICAL/164 affected symbols (ADR §6 due diligence). Six-gate ripple: .gitignore, eslint.config.mjs, docs/INVENTORY.md, docs/INVENTORY-MANIFEST.json (regenerated), CONTEXT.md glossary. Design: .gsd/phase/chore-3414-tokenizer-first-seam/40-design.md Test matrix: .gsd/phase/chore-3414-tokenizer-first-seam/50-test-matrix.md Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3414): add required fast-check property tests per code review TESTING-STANDARDS.md:169 requires at least one fast-check property test for any module that implements parsing — src/token-scanner.cts had none, an orthogonal Standards-axis review finding. Adds two seeded property tests (mirroring Phase 1/2's fast-check-setup.cjs convention): indentWidth counts exactly a generated leading-space run; tokenizeShellLike round-trips a generated array of whitespace/quote-free words joined with single spaces. The design doc's own "no property test needed" rationale was wrong — it argued no algebraic law applied, but the standard is unconditional for parsing modules regardless of whether one "feels" applicable. Corrected in .gsd/phase/chore-3414-tokenizer-first-seam/50-test-matrix.md. Also fixes two Spec-axis wording drifts the same review found between the design doc and the shipped code (doc-only, no behavior change): extractBranchArgument's documented signature dropped an unused subVariants parameter that was never implemented, and the #3169 fail-first fixture description corrected from "15-decision plan via cmdDecisionCoverageVerify" to the actual compact 3-decision analog via the real blocking gate, check.decision-coverage-plan. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(#3414): add changeset for #3169 fix Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(#3414): backfill changeset pr number to 3424 Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Sonnet 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.