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* fix(#1729): resolve phase headers with a pre-colon parenthetical tag A phase header may carry a parenthetical tag between the number and the colon, e.g. `### Phase 26 (Cluster B): Title`. Every phase-header regex built `Phase\s+<num>` immediately against the colon delimiter, so the tagged phase was invisible: the resolver returned found:false and, just as bad, the capture-all enumeration/parse paths (roadmap analyze, milestone listing + milestone-scope filter, verify, init/import, state total_phases, validate, the command router, preamble stripping, and the phase-remove renumbering rewrite) silently dropped, miscounted, or failed to renumber it — wrong phase_count, progress_percent, next_phase, or corrupt numbering after a removal. The fix tolerates the tag at the header seam. Parameterized resolver sites compose the exported OPTIONAL_PHASE_TAG_SOURCE fragment; literal enumeration sites inline its character-for-character mirror `(?:\s*\([^)\n]*\))?`, placed immediately before the colon so it cannot alter an existing match (optional, single-line, one paren pair, no capture-group shift). In the renumber-on-removal rewrite the tag is folded into the re-emitted suffix capture so it survives verbatim. Both forms are documented to change together and a drift-guard test asserts their behavioral equivalence over a header corpus. Deliberately excluded: roadmap-upgrade.cts (legacy one-time migration), where tolerating the tag would silently drop it on header rewrite — that needs its own data-preserving treatment. Known boundaries left for follow-up: checklist/bullet-style phase entries (`- [ ] Phase N (tag):`) and a malformed space-before-colon variant, both pre-existing. Validated empirically against the issue's reproduction: `roadmap get-phase 26` resolves and `roadmap analyze` lists Phase 26 with the tag excluded from the name (phase_count 2, next 26); an all-tagged versioned roadmap now scopes correctly instead of falling back to a pass-all filter. Regression coverage in tests/phase.test.cjs asserts resolver parity (pre- vs post-colon), padding tolerance (#3537), decimal sub-phases, no cross-phase false match, the shared seam, enumeration coherence, renumber-preserves-tag, and seam/mirror drift. Full unit suite green (7291 pass, 0 fail); eslint + regression-name + resolution-provenance + changeset lints pass. Reviewed by Codex (no critical/high; the two enumeration misses it surfaced are folded in). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> * chore(#1729): add changeset for pre-colon phase-tag fix Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.8 (1M context) <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, Gemini 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, Gemini 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, Gemini 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 your first project:
/gsd-new-project
New here? Follow Your first project for a guided walkthrough from install to first shipped phase.
Documentation
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.