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* feat(#1077): phase 5f-2 — drive the hookEvents dialect (PostToolUse/AfterTool) from the descriptor postToolEvent (bin/install.js) and preToolEvent (applySettingsJsonHooks in runtime-hooks-surface.cts) now select the event-name dialect from registry.runtimes[id].runtime.hookEvents instead of the hardcoded (runtime === 'gemini' || runtime === 'antigravity') check: hookEvents === 'gemini' → AfterTool/BeforeTool; else → PostToolUse/PreToolUse. hookEvents threaded into the applySettingsJsonHooks opts bag. Equivalence-preserving (Codex-verified): hookEvents 'gemini' is exactly {gemini, antigravity}, 'claude' the rest; undefined → claude dialect (matches the old else). The per-event SET guards (isQwen||claude → SubagentStop/Stop/PreCompact; runtime==='claude' → FileChanged; isGemini → Gemini agent-events) stay HARDCODED — hookEvents (2-value) is too coarse to drive them (the event set differs within hookEvents='claude'); per-event-set drive tracked in #1076. Registry-parity test (enh-1077): asserts BOTH post-tool (AfterTool/PostToolUse) AND pre-tool (BeforeTool/PreToolUse) dialects are a pure function of hookEvents, for gemini/antigravity/claude/augment — non-vacuous (catches a broken hookEvents thread). Closes #1077 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * test(#1077): build hooks/dist in before() so dialect-drive test passes in scoped CI hooks/dist is gitignored and absent in scoped/windows CI jobs that do not pre-run build:hooks. Without it, install() finds no hook files and all AfterTool/BeforeTool/PostToolUse/PreToolUse event arrays come back empty, failing every hook-presence assertion. Added an idempotent ensureHooksDist() called in a top-level before() — mirrors the pattern from bug-376-claude-js-hook-gsd-rewriter.test.cjs. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * feat(#1055): add installSurface/writesSharedSettings/permissionWriter/extendedHookEvents to runtime descriptors Purely additive: four new fields on all 16 runtime capability.json descriptors, validator extended with three new closed-vocab sets, registry regenerated. Test fixtures (VALID_RUNTIME_CAP and makeRuntimeCap) updated to include the new required fields so all 255 capability-registry tests continue to pass. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * feat(#1076): drive per-event hook guards from extendedHookEvents descriptor Replace hardcoded runtime-name checks (isQwen||runtime==='claude', runtime==='claude', isGemini) in applySettingsJsonHooks with a single descriptor-driven extendedEvents array derived from the new opts field. Remove isQwen and isGemini derivations (no remaining uses after the three guard blocks are migrated). Wire extendedHookEvents from the capability registry in bin/install.js call site. Add behavioral regression test (enh-1076-extended-hook-events-drive.test.cjs) confirming the drive is purely descriptor-based and runtime-name-agnostic. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * feat(#1055): drive resolveRuntimeConfigIntent from the runtime descriptor; retire hand-kept REGISTRY - Rewrites src/runtime-config-adapter-registry.cts to require capability-registry.cjs and read installSurface / writesSharedSettings / permissionWriter from runtimes[id].runtime; deletes the hand-kept REGISTRY const (ADR-857 phase 5g drive 2). - ALLOWED_CONFIG_RUNTIMES is now derived from descriptor entries that have installSurface. - Fixes the configFormat parity gate in scripts/gen-capability-registry.cjs to read installSurface directly from capMap descriptor bodies, breaking the require cycle (adapter now requires the generated registry; gen-script must not require the adapter). - Adds golden-master test tests/enh-1055-config-intent-descriptor-drive.test.cjs (41 tests) pinning all 16 runtimes' return shapes and the TypeError-on-unknown contract. - Updates scripts/lint-test-file-count.allowlist.json (config module, +1 file). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * feat(#1076): make hooksSurface descriptor load-bearing for the settings-json hook-skip - Adds hooksSurface?: string to ApplySettingsJsonHooksOpts and destructuring in applySettingsJsonHooks (src/runtime-hooks-surface.cts). - Replaces the hardcoded !isOpencode && !isKilo hook-skip guard with hooksSurface !== 'none'; removes the now-unused isOpencode/isKilo derivations (ADR-857 phase 5g drive 3). - Passes hooksSurface from the runtime descriptor at the applySettingsJsonHooks call site in bin/install.js using the established _capabilityRegistry?.runtimes?.[runtime]?.runtime?.hooksSurface idiom. - Extends tests/enh-1076-extended-hook-events-drive.test.cjs with two new suites proving: (a) hooksSurface:'none' writes no hooks regardless of runtime name; (b) hooksSurface:'settings-json' writes hooks even for 'opencode' (previously hardcoded to skip). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * docs: record installSurface/writesSharedSettings/permissionWriter/extendedHookEvents descriptor axes in ADR-1016 Add Decision 7a documenting the four axes added in the 5f-completion pass, update axis counts from "six" to "twelve", note 5f-completion drives as done in Decision 8's ladder, update Out of scope to reflect #1055/#1076 are done and 5g (InstallPlan capstone) remains the only open phase. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * fix(#1055): parity gate must fire on configFormat↔installSurface mismatch (read installSurface at the descriptor level) The test fixture makeRuntimeCapMap did not include installSurface in the runtime object, so the gate's typeof r.installSurface !== 'string' guard always skipped the entry and never threw. Added installSurface as an optional third parameter to makeRuntimeCapMap and passed the correct installSurface values ('settings-json' for claude, 'codex-toml' for codex) to the two THROWS tests. The gate implementation already reads r.installSurface correctly from the descriptor level. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * feat(#1076): add installSurface↔hooksSurface + extendedHookEvents↔hookEvents consistency gates with rejection tests GATE A: INSTALL_SURFACE_TO_ALLOWED_HOOKS_SURFACES map in validateRuntimeBody enforces that a runtime's hooksSurface is valid for its installSurface (e.g. profile-marker-only only allows none, codex-toml only allows codex-hooks-json). Derived from the 16 real runtime descriptors. GATE B: validateRuntimeBody checks that if extendedHookEvents contains Gemini agent-events (BeforeAgent/AfterAgent/BeforeModel), hookEvents must be 'gemini'; if it contains Claude-family events (SubagentStop/Stop/PreCompact/FileChanged), hookEvents must be 'claude'. Added 10 rejection tests in suite 27 covering each gate + each new field validator. All 16 real runtimes satisfy both gates (verified before coding). Exports: INSTALL_SURFACE_TO_ALLOWED_HOOKS_SURFACES, VALID_INSTALL_SURFACES, VALID_EXTENDED_HOOK_EVENTS, VALID_PERMISSION_WRITERS, validateRuntimeBody. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * test(#1076): strengthen hooksSurface-drive assertions; defensive hooksSurface fallback; drop vacuous dup 1. bin/install.js: add explicit literal fallback for hooksSurface when the committed capability registry fails to load (opencode/kilo → 'none', all others → 'settings-json'). The descriptor is always the source of truth in normal operation. 2. enh-1076 Suite 7: change SessionStart assertion from key-presence (hasOwnProperty) to at least-one-command (hasHooksFor), so the test fails if hooks are initialized-but-empty. ensureHooksDist() in before() guarantees hook files exist. 3. enh-1055 Test 2: remove vacuous duplicate suite that re-asserted intent.runtime === row.runtime already fully covered by Test 1's deepStrictEqual over all four fields. 4. capability-registry.test.cjs: fix stale comments in the grok-skip test that claimed the parity gate uses the adapter registry; gate reads purely from the descriptor (installSurface absent → typeof r.installSurface !== 'string' → soft-skip). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * feat(#1082): materialize the InstallPlan — collect install-level descriptor axes into resolveInstallPlan; route install()/finishInstall() through it (ADR-58/5g) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * docs: record 5g InstallPlan materialization (ADR-58 Accepted, ADR-1016 phase-5 complete) ADR-1016 Decision 8 step 7 updated to DONE: resolveInstallPlan(runtime) in runtime-config-adapter-registry collects install-level descriptor axes into the typed InstallPlan consumed by install()/finishInstall(). Out-of-scope section updated: 5g capstone is complete, phase 5 fully materialized. ADR-1016 line ~20 updated: InstallPlan IS now materialized (both halves). ADR-58 Implementation note added (2026-06-11): realized in runtime-config-adapter-registry (co-located with adapter-selection). CONTEXT.md Runtime Config Adapter Registry entry extended to document resolveInstallPlan and both-halves realization. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * test(#1082): update install drift guard to the resolveInstallPlan seam (5g) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> --------- Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.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.