diff --git a/scripts/resolvers/preamble.ts b/scripts/resolvers/preamble.ts
index f7057452..6404ae78 100644
--- a/scripts/resolvers/preamble.ts
+++ b/scripts/resolvers/preamble.ts
@@ -13,12 +13,14 @@ import type { TemplateContext } from './types';
  */
 
 function generatePreambleBash(ctx: TemplateContext): string {
-  const runtimeRoot = ctx.host === 'codex'
+  const hostConfigDir: Record<string, string> = { codex: '.codex', factory: '.factory' };
+  const runtimeRoot = (ctx.host !== 'claude')
     ? `_ROOT=$(git rev-parse --show-toplevel 2>/dev/null)
-GSTACK_ROOT="$HOME/.codex/skills/gstack"
-[ -n "$_ROOT" ] && [ -d "$_ROOT/.agents/skills/gstack" ] && GSTACK_ROOT="$_ROOT/.agents/skills/gstack"
+GSTACK_ROOT="$HOME/${hostConfigDir[ctx.host]}/skills/gstack"
+[ -n "$_ROOT" ] && [ -d "$_ROOT/${ctx.paths.localSkillRoot}" ] && GSTACK_ROOT="$_ROOT/${ctx.paths.localSkillRoot}"
 GSTACK_BIN="$GSTACK_ROOT/bin"
 GSTACK_BROWSE="$GSTACK_ROOT/browse/dist"
+GSTACK_DESIGN="$GSTACK_ROOT/design/dist"
 `
     : '';
 
diff --git a/scripts/resolvers/types.ts b/scripts/resolvers/types.ts
index f2ba80c9..891ea0cd 100644
--- a/scripts/resolvers/types.ts
+++ b/scripts/resolvers/types.ts
@@ -1,4 +1,4 @@
-export type Host = 'claude' | 'codex';
+export type Host = 'claude' | 'codex' | 'factory';
 
 export interface HostPaths {
   skillRoot: string;
@@ -23,6 +23,13 @@ export const HOST_PATHS: Record<Host, HostPaths> = {
     browseDir: '$GSTACK_BROWSE',
     designDir: '$GSTACK_DESIGN',
   },
+  factory: {
+    skillRoot: '$GSTACK_ROOT',
+    localSkillRoot: '.factory/skills/gstack',
+    binDir: '$GSTACK_BIN',
+    browseDir: '$GSTACK_BROWSE',
+    designDir: '$GSTACK_DESIGN',
+  },
 };
 
 export interface TemplateContext {
diff --git a/scripts/resolvers/utility.ts b/scripts/resolvers/utility.ts
index 48e9c0d8..660e4ec5 100644
--- a/scripts/resolvers/utility.ts
+++ b/scripts/resolvers/utility.ts
@@ -370,5 +370,8 @@ export function generateCoAuthorTrailer(ctx: TemplateContext): string {
   if (ctx.host === 'codex') {
     return 'Co-Authored-By: OpenAI Codex <noreply@openai.com>';
   }
+  if (ctx.host === 'factory') {
+    return 'Co-Authored-By: Factory Droid <droid@users.noreply.github.com>';
+  }
   return 'Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>';
 }