353f63d170
* feat(#1431): runtime capability registry overlay (ADR-1244 Phase 2) Promote the registry from a frozen data file to loadRegistry({includeInstalled}), composing the first-party registry with a validated installed overlay (ADR-1244 D2): - Extract the conformance validator to a shared runtime-callable module (gsd-core/bin/lib/capability-validator.cjs); the generator re-exports it verbatim, guarded by a generative-parity test (no build-time/runtime drift). - capability-loader.cts: loadRegistry({includeInstalled}) composes first-party ∪ validated overlay from $GSD_HOME/.gsd/capabilities (global) and <root>/.gsd/capabilities (project) via the canonical buildRegistry. First-party always wins (id/skill/agent/config/command-family + reserved gsd-/anthropic- prefixes); full merged-set cross-capability validation; engines.gsd load-time re-gate (skip-with-warning); gate-kind capabilities FAIL CLOSED; fragment-path escapes rejected. - semverSatisfies (hand-written, no dep) for the engines.gsd gate, fail-closed. - Wire surface/state + loop to the overlay; loop injects a blocking gate for each skipped gate-kind overlay (fail-closed). - cwd-aware overlay config-key federation: config-loader _federatedConfigSchema(cwd) + config-schema isValidConfigKey(key, cwd) compose the overlay per loadConfig/ config-set call (never eager at module load, never wrong-cwd); first-party path unchanged with no cwd. - run-tests.cjs sandboxes GSD_HOME (idempotent — nested spawns reuse it) for test hermeticity; capability-loader.cjs git+eslint-ignored (tsc artifact); capability-validator.cjs stays linted (#551 migration coverage). Closes #1431 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * docs(#1431): add changeset for runtime capability registry overlay Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * test(#1431): kill config-schema cwd-aware federation mutants (Stryker ≥52) The cwd-aware overlay config-key federation added to config-schema.cts (_capabilityConfigSchema(cwd) + isCapabilityConfigKey/isValidConfigKey cwd threading) introduced mutable surface uncovered by config-schema's mutation test set, dropping its score to 39.58% (below the 52 break threshold). Add a real-overlay-fixture describe block exercising every branch (cwd guard, overlay loadRegistry, found-branch, first-party fallback, cwd threading); local Stryker score 39.58% -> 77.08%. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.8 <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.