diff --git a/packages/kilo-docs/source-links.md b/packages/kilo-docs/source-links.md
index b963b7af34..ab260f2cfa 100644
--- a/packages/kilo-docs/source-links.md
+++ b/packages/kilo-docs/source-links.md
@@ -1,7 +1,7 @@
 # Source Code Links
 
 <!-- Auto-generated by script/extract-source-links.ts — DO NOT EDIT -->
-<!-- 78 unique URLs extracted from extension and CLI source -->
+<!-- 77 unique URLs extracted from extension and CLI source -->
 
 - <https://api.apertis.ai/v1>
   <!-- packages/opencode/src/provider/model-cache.ts -->
@@ -59,8 +59,6 @@
   <!-- packages/kilo-vscode/webview-ui/src/components/chat/FeedbackDialog.tsx -->
 - <https://github.com/microsoft/vscode-eslint/archive/refs/heads/main.zip>
   <!-- packages/opencode/src/lsp/server.ts -->
-- <https://github.com/OpenRouterTeam/ai-sdk-provider/pull/344/>
-  <!-- packages/opencode/src/provider/transform.ts -->
 - <https://github.com/oven-sh/bun/issues/16682>
   <!-- packages/opencode/src/provider/provider.ts -->
 - <https://github.com/vercel/ai/blob/2dc67e0ef538307f21368db32d5a12345d98831b/packages/ai/src/logger/log-warnings.ts#L85>
diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index 03c1136a14..72deb39d04 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -282,56 +282,10 @@ export namespace ProviderTransform {
     })
   }
 
-  // kilocode_change - function added
-  function fixDuplicateReasoning(msgs: ModelMessage[], model: Provider.Model) {
-    for (const msg of msgs) {
-      if (!Array.isArray(msg.content)) {
-        continue
-      }
-      const encryptedDataSet = new Set<string>()
-      const textSet = new Set<string>()
-      for (const part of msg.content) {
-        if (!("providerOptions" in part)) continue // kilocode_change - ToolApprovalRequest lacks providerOptions
-        const openrouterProviderOptions = part.providerOptions?.openrouter as
-          | {
-              reasoning_details?: { data?: string; text?: string; signature?: string }[]
-            }
-          | undefined
-        if (!openrouterProviderOptions || !openrouterProviderOptions.reasoning_details) {
-          continue
-        }
-        openrouterProviderOptions.reasoning_details = openrouterProviderOptions.reasoning_details.filter((rd) => {
-          if (rd.data) {
-            if (!encryptedDataSet.has(rd.data)) {
-              encryptedDataSet.add(rd.data)
-              return true
-            }
-            return false
-          }
-          if (rd.text) {
-            if ((model.family === "claude" || model.id.includes("claude")) && !rd.signature) return false
-            if (!textSet.has(rd.text)) {
-              textSet.add(rd.text)
-              return true
-            }
-            return false
-          }
-          return true
-        })
-      }
-    }
-  }
-
   export function message(msgs: ModelMessage[], model: Provider.Model, options: Record<string, unknown>) {
     msgs = unsupportedParts(msgs, model)
     msgs = normalizeMessages(msgs, model, options)
 
-    // kilocode_change - workaround for @openrouter/ai-sdk-provider v1 duplicating reasoning
-    // fixed in https://github.com/OpenRouterTeam/ai-sdk-provider/pull/344/
-    if (model.api.npm === "@openrouter/ai-sdk-provider") {
-      fixDuplicateReasoning(msgs, model)
-    }
-
     if (
       (model.providerID === "anthropic" ||
         model.providerID === "google-vertex-anthropic" ||