diff --git a/.changeset/fix-adapter-base-deps.md b/.changeset/fix-adapter-base-deps.md
new file mode 100644
index 00000000..553e023c
--- /dev/null
+++ b/.changeset/fix-adapter-base-deps.md
@@ -0,0 +1,5 @@
+---
+"@perstack/runtime": patch
+---
+
+fix: move @perstack/adapter-base to devDependencies
diff --git a/apps/runtime/package.json b/apps/runtime/package.json
index da8b632f..b0e5666d 100644
--- a/apps/runtime/package.json
+++ b/apps/runtime/package.json
@@ -41,7 +41,6 @@
     "@ai-sdk/openai": "^2.0.0",
     "@modelcontextprotocol/sdk": "^1.25.1",
     "@paralleldrive/cuid2": "^3.0.4",
-    "@perstack/adapter-base": "workspace:*",
     "@perstack/api-client": "workspace:*",
     "@perstack/base": "workspace:*",
     "@perstack/core": "workspace:*",
@@ -55,6 +54,7 @@
     "xstate": "^5.25.0"
   },
   "devDependencies": {
+    "@perstack/adapter-base": "workspace:*",
     "@perstack/anthropic-provider": "workspace:*",
     "@perstack/azure-openai-provider": "workspace:*",
     "@perstack/bedrock-provider": "workspace:*",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 0d8074d1..2177ceb2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -240,9 +240,6 @@ importers:
       '@paralleldrive/cuid2':
         specifier: ^3.0.4
         version: 3.0.4
-      '@perstack/adapter-base':
-        specifier: workspace:*
-        version: link:../../packages/runtimes/adapter-base
       '@perstack/api-client':
         specifier: workspace:*
         version: link:../../packages/api-client
@@ -277,6 +274,9 @@ importers:
         specifier: ^5.25.0
         version: 5.25.0
     devDependencies:
+      '@perstack/adapter-base':
+        specifier: workspace:*
+        version: link:../../packages/runtimes/adapter-base
       '@perstack/anthropic-provider':
         specifier: workspace:*
         version: link:../../packages/providers/anthropic