diff --git a/packages/host/agent-adapter/package.json b/packages/host/agent-adapter/package.json
index 2e69f9ea9..6b552d969 100644
--- a/packages/host/agent-adapter/package.json
+++ b/packages/host/agent-adapter/package.json
@@ -18,7 +18,7 @@
     "@linkcode/schema": "workspace:*",
     "@linkcode/transport": "workspace:*",
     "@openai/codex": "^0.144.6",
-    "@opencode-ai/sdk": "^1.18.3",
+    "@opencode-ai/sdk": "^1.18.21",
     "cross-spawn": "^7.0.6",
     "foxts": "^5.9.1",
     "smol-toml": "^1.7.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c9726975f..4e8a7ecd6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1001,8 +1001,8 @@ importers:
         specifier: ^0.144.6
         version: 0.144.6
       '@opencode-ai/sdk':
-        specifier: ^1.18.3
-        version: 1.18.3
+        specifier: ^1.18.21
+        version: 1.18.21
       cross-spawn:
         specifier: ^7.0.6
         version: 7.0.6
@@ -3851,8 +3851,8 @@ packages:
     cpu: [x64]
     os: [win32]
 
-  '@opencode-ai/sdk@1.18.3':
-    resolution: {integrity: sha512-Mevo4e6kQwbvto9E+42KSIVMhp+JBu+SwQhC5AomAvrV6Xkio3U249T+xDILDCXhl5Z/Hi/DlAuVLzpGnuh0gg==}
+  '@opencode-ai/sdk@1.18.21':
+    resolution: {integrity: sha512-k6iHQ5C8wOPglk+LgFyYnst168cGMQYumgpbVoeXJ+iC1AtvwD5zmjuF8CxMze/y9G1K2bOeO6p9yRvA7eHZLA==}
 
   '@opentelemetry/api-logs@0.214.0':
     resolution: {integrity: sha512-40lSJeqYO8Uz2Yj7u94/SJWE/wONa7rmMKjI1ZcIjgf3MHNHv1OZUCrCETGuaRF62d5pQD1wKIW+L4lmSMTzZA==}
@@ -14210,7 +14210,7 @@ snapshots:
   '@openai/codex@0.144.6-win32-x64':
     optional: true
 
-  '@opencode-ai/sdk@1.18.3':
+  '@opencode-ai/sdk@1.18.21':
     dependencies:
       cross-spawn: 7.0.6