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* enhance(#4487): stamp windows-ledger entries with the resolved milestone Broken-windows ledger entries (`.planning/WINDOWS.md`) carry `phase` as a bare number. Phase numbers are unique only within one active phases/ directory -- `milestone complete` archives phases and frees their numbers for reuse, so two milestones routinely produce entries sharing the same phase value with nothing distinguishing them. Since `/gsd-ship` blocks while any entry is open, an already-archived milestone's open entries could silently block shipping the CURRENT milestone, with no supported way to attribute which entry belonged to which milestone short of manually cross-referencing MILESTONES.md timestamps against decision IDs that happened to appear in description prose. Added an optional `milestone: string | null` field to WindowEntry, stamped by `windows append` (cmdWindowsAppend, which already does file I/O) from the workstream's resolved milestone version. Reused the existing `readCurrentMilestoneVersion` (workstream-inventory.cts -- STATE.md `milestone:` frontmatter first, ROADMAP.md in-progress marker as fallback) rather than writing a parallel implementation: exported it via that module's existing `export = {...}` CJS-interop convention (matching the `import ... = require(...)` pattern already used in workstream.cts/init.cts). appendWindow itself stays pure -- it accepts milestone as an optional input field and passes it through; only the CLI-facing cmdWindowsAppend resolves it from disk. Backward compatible by construction: validateEntryShape does NOT add `milestone` to its required fields, so an existing ledger entry with no milestone key at all parses without error and reads back as null -- exactly "recorded before this change," no migration needed. The rendered markdown table is deliberately left unchanged (the issue's own words: "the JSON is the source of truth"); adding a table column would be a separate, larger change than adding an optional JSON field. Two smaller gaps the issue itself flags as separable ("happy to split them out") are explicitly NOT addressed here: no verb to amend an entry's description, and the table/JSON drift-repair advice that can destroy table-only edits on a parse failure. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#4487): preserve absent-vs-null milestone through parse/render roundtrip validateEntryShape stamped an explicit `milestone: null` onto every entry lacking the key, so a pre-#4487 ledger entry gained permanent JSON churn ("milestone": null) the first time ANY entry in the ledger was touched -- breaking the pure parse/render roundtrip-identity property test (render(parse(render(ledger))) must equal render(ledger)) and, in real usage, contaminating unrelated entries' diffs on every append/waive/fixed of an old ledger. Fixed by distinguishing "key genuinely absent" (undefined -- JSON. stringify drops it, matching pre-#4487 behavior exactly) from "recorded but unresolvable" (explicit null, the real signal appendWindow stamps on brand-new entries). WindowEntry.milestone is now optional (`milestone?: string | null`) so returning undefined type-checks. Updated tests/broken-windows.test.cjs's roundtrip property generator to exercise all three states (absent/null/string) -- its prior silence on this field is exactly what let the regression through. Also corrected the earlier backward-compatibility test's assertion: a pre-#4487 entry reads as milestone: undefined, not null, and re-rendering it must not introduce a milestone key at all. Also ran npm run regen:derived: docs/features/broken-windows-ledger.md (edited in an earlier commit) had never been propagated to its generated docs/FEATURES.md projection, which is what was independently failing tests/features-index-gate.test.cjs and, as a side effect of staleness, tripping tests/fragment-single-edit-propagation.install. test.cjs's second-source-surface check. Manually verified via the compiled lib (500 fast-check iterations plus direct legacy/new-entry roundtrip checks) before wiring the test file, since this repo blocks local node --test. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#4487): materialize milestone via conditional spread, not undefined assignment An object literal property set to `milestone: undefined` is still an OWN property -- `'milestone' in entry` reads true regardless of the assigned value, only JSON.stringify treats undefined specially. My prior commit's own new backward-compat test asserted `'milestone' in entry === false` for a pre-#4487 entry and failed on exactly this. Switched to conditionally spreading the key in only when the source object actually had it, so a genuinely absent milestone is not materialized at all -- matching both the `in` check and JSON serialization. Re-verified via the compiled lib (500 fast-check roundtrip iterations, plus the specific in/undefined/JSON assertions the failing test makes) before re-running gsd-test. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(#4487): backfill changeset pr number to 4583 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.
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.