From a146936a1f2b1d1cff7ba388aa719983d47ce84b Mon Sep 17 00:00:00 2001
From: Mattias Petersson <mattias.petersson@gmail.com>
Date: Sun, 12 Jul 2026 16:46:44 +0200
Subject: [PATCH] feat(host): add declarative hosts configuration for
 Antigravity (Agy)

---
 hosts/agy.ts             | 59 ++++++++++++++++++++++++++++++++++++++++
 hosts/index.ts           |  5 ++--
 test/host-config.test.ts |  6 ++--
 3 files changed, 66 insertions(+), 4 deletions(-)
 create mode 100644 hosts/agy.ts

diff --git a/hosts/agy.ts b/hosts/agy.ts
new file mode 100644
index 000000000..b938b3b1a
--- /dev/null
+++ b/hosts/agy.ts
@@ -0,0 +1,59 @@
+import type { HostConfig } from '../scripts/host-config';
+
+const agy: HostConfig = {
+  name: 'agy',
+  displayName: 'Antigravity',
+  cliCommand: 'agy',
+  cliAliases: [],
+
+  globalRoot: '.gemini/config/plugins/gstack/skills',
+  localSkillRoot: '.gemini/config/plugins/gstack/skills',
+  hostSubdir: '.gemini/config/plugins/gstack',
+  usesEnvVars: true,
+
+  frontmatter: {
+    mode: 'allowlist',
+    keepFields: [
+      'name',
+      'preamble-tier',
+      'version',
+      'description',
+      'allowed-tools',
+      'triggers',
+      'hooks',
+      'gbrain',
+    ],
+    descriptionLimit: null,
+  },
+
+  generation: {
+    generateMetadata: false,
+    skipSkills: ['codex'],
+  },
+
+  pathRewrites: [
+    { from: '~/.claude/skills/gstack', to: '$GSTACK_ROOT' },
+    { from: '.claude/skills/gstack', to: '.gemini/config/plugins/gstack/skills' },
+    { from: '.claude/skills', to: '.gemini/config/plugins/gstack' },
+  ],
+
+  toolRewrites: {},
+
+  suppressedResolvers: ['GBRAIN_CONTEXT_LOAD', 'GBRAIN_SAVE_RESULTS'],
+
+  runtimeRoot: {
+    globalSymlinks: ['bin', 'browse/dist', 'browse/bin', 'gstack-upgrade', 'ETHOS.md'],
+    globalFiles: {
+      'review': ['checklist.md', 'TODOS-format.md'],
+    },
+  },
+
+  install: {
+    prefixable: false,
+    linkingStrategy: 'symlink-generated',
+  },
+
+  learningsMode: 'basic',
+};
+
+export default agy;
diff --git a/hosts/index.ts b/hosts/index.ts
index cc1c213b5..4cd643ce4 100644
--- a/hosts/index.ts
+++ b/hosts/index.ts
@@ -16,9 +16,10 @@ import cursor from './cursor';
 import openclaw from './openclaw';
 import hermes from './hermes';
 import gbrain from './gbrain';
+import agy from './agy';
 
 /** All registered host configs. Add new hosts here. */
-export const ALL_HOST_CONFIGS: HostConfig[] = [claude, codex, factory, kiro, opencode, slate, cursor, openclaw, hermes, gbrain];
+export const ALL_HOST_CONFIGS: HostConfig[] = [claude, codex, factory, kiro, opencode, slate, cursor, openclaw, hermes, gbrain, agy];
 
 /** Map from host name to config. */
 export const HOST_CONFIG_MAP: Record<string, HostConfig> = Object.fromEntries(
@@ -65,4 +66,4 @@ export function getExternalHosts(): HostConfig[] {
 }
 
 // Re-export individual configs for direct import
-export { claude, codex, factory, kiro, opencode, slate, cursor, openclaw, hermes, gbrain };
+export { claude, codex, factory, kiro, opencode, slate, cursor, openclaw, hermes, gbrain, agy };
diff --git a/test/host-config.test.ts b/test/host-config.test.ts
index 577057033..ba7fbc41f 100644
--- a/test/host-config.test.ts
+++ b/test/host-config.test.ts
@@ -22,6 +22,7 @@ import {
   slate,
   cursor,
   openclaw,
+  agy,
 } from '../hosts/index';
 import { HOST_PATHS } from '../scripts/resolvers/types';
 
@@ -30,8 +31,8 @@ const ROOT = path.resolve(import.meta.dir, '..');
 // ─── hosts/index.ts ─────────────────────────────────────────
 
 describe('hosts/index.ts', () => {
-  test('ALL_HOST_CONFIGS has 10 hosts', () => {
-    expect(ALL_HOST_CONFIGS.length).toBe(10);
+  test('ALL_HOST_CONFIGS has 11 hosts', () => {
+    expect(ALL_HOST_CONFIGS.length).toBe(11);
   });
 
   test('ALL_HOST_NAMES matches config names', () => {
@@ -53,6 +54,7 @@ describe('hosts/index.ts', () => {
     expect(slate.name).toBe('slate');
     expect(cursor.name).toBe('cursor');
     expect(openclaw.name).toBe('openclaw');
+    expect(agy.name).toBe('agy');
   });
 
   test('getHostConfig returns correct config', () => {