From ca5e85d6eab37e8f82ece19dcc482752acbe2ad5 Mon Sep 17 00:00:00 2001
From: Rohan Godha <git@rohangodha.com>
Date: Sun, 1 Feb 2026 15:42:42 -0500
Subject: [PATCH] fix: prompt caching for opus on bedrock (#11664)

---
 packages/opencode/src/provider/transform.ts       | 5 +++--
 packages/opencode/test/provider/transform.test.ts | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index f5fe419db..68220b90c 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -179,7 +179,7 @@ export namespace ProviderTransform {
         cacheControl: { type: "ephemeral" },
       },
       bedrock: {
-        cachePoint: { type: "ephemeral" },
+        cachePoint: { type: "default" },
       },
       openaiCompatible: {
         cache_control: { type: "ephemeral" },
@@ -190,7 +190,8 @@ export namespace ProviderTransform {
     }
 
     for (const msg of unique([...system, ...final])) {
-      const shouldUseContentOptions = providerID !== "anthropic" && Array.isArray(msg.content) && msg.content.length > 0
+      const useMessageLevelOptions = providerID === "anthropic" || providerID.includes("bedrock")
+      const shouldUseContentOptions = !useMessageLevelOptions && Array.isArray(msg.content) && msg.content.length > 0
 
       if (shouldUseContentOptions) {
         const lastContent = msg.content[msg.content.length - 1]
diff --git a/packages/opencode/test/provider/transform.test.ts b/packages/opencode/test/provider/transform.test.ts
index 0973e6158..cbb9ddbc4 100644
--- a/packages/opencode/test/provider/transform.test.ts
+++ b/packages/opencode/test/provider/transform.test.ts
@@ -1166,7 +1166,7 @@ describe("ProviderTransform.message - claude w/bedrock custom inference profile"
     expect(result[0].providerOptions?.bedrock).toEqual(
       expect.objectContaining({
         cachePoint: {
-          type: "ephemeral",
+          type: "default",
         },
       }),
     )