diff --git a/patch_provider.py b/patch_provider.py
new file mode 100644
index 0000000..e6adc3d
--- /dev/null
+++ b/patch_provider.py
@@ -0,0 +1,86 @@
+path = '/mnt/NVME/Docker/opencode-build/opencode/packages/opencode/src/provider/provider.ts'
+with open(path, 'r') as f:
+    src = f.read()
+
+MARKER_1 = 'statusText: res.statusText,\n  })\n}\n\nfunction googleVertexAnthropicBaseURL'
+PATCH_FN = r"""statusText: res.statusText,
+  })
+}
+
+// Fix missing/null tool_call ids in SSE streams from OpenAI-compatible providers.
+// Some proxies (e.g. 9Router/LiteLLM forwarding Anthropic) emit tool-call chunks
+// without an `id` field, causing @ai-sdk/openai-compatible to throw
+// "Expected 'id' to be a string."  Inject a stable synthetic id per tool-call index.
+function patchToolCallIds(res: Response, npm: string): Response {
+  if (npm !== "@ai-sdk/openai-compatible" && npm !== "@ai-sdk/openai") return res
+  if (!res.body) return res
+  if (!res.headers.get("content-type")?.includes("text/event-stream")) return res
+  const reader = res.body.getReader()
+  const encoder = new TextEncoder()
+  const decoder = new TextDecoder()
+  const idByIndex = new Map<number, string>()
+  let buf = ""
+  const body = new ReadableStream<Uint8Array>({
+    async pull(ctrl) {
+      const { done, value } = await reader.read()
+      if (done) { if (buf) ctrl.enqueue(encoder.encode(buf)); ctrl.close(); return }
+      buf += decoder.decode(value, { stream: true })
+      const nl = buf.lastIndexOf("\n")
+      if (nl === -1) return
+      const complete = buf.slice(0, nl + 1)
+      buf = buf.slice(nl + 1)
+      const lines = complete.split("\n")
+      const out: string[] = []
+      for (const line of lines) {
+        if (!line.startsWith("data: ")) { out.push(line); continue }
+        const payload = line.slice(6)
+        if (payload === "[DONE]") { out.push(line); continue }
+        try {
+          const parsed = JSON.parse(payload)
+          let dirty = false
+          for (const choice of parsed?.choices ?? []) {
+            for (const tc of choice?.delta?.tool_calls ?? []) {
+              if (typeof tc.id !== "string" || tc.id === "") {
+                const idx: number = tc.index ?? 0
+                if (!idByIndex.has(idx))
+                  idByIndex.set(idx, `call_${crypto.randomUUID().replace(/-/g,"").slice(0,24)}`)
+                tc.id = idByIndex.get(idx); dirty = true
+              }
+            }
+          }
+          out.push(dirty ? `data: ${JSON.stringify(parsed)}` : line)
+        } catch { out.push(line) }
+      }
+      ctrl.enqueue(encoder.encode(out.join("\n")))
+    },
+    async cancel(reason) { await reader.cancel(reason) },
+  })
+  return new Response(body, {
+    headers: new Headers(res.headers),
+    status: res.status,
+    statusText: res.statusText,
+  })
+}
+
+function googleVertexAnthropicBaseURL"""
+
+if MARKER_1 in src:
+    src = src.replace(MARKER_1, PATCH_FN, 1)
+    print('OK: inserted patchToolCallIds()')
+else:
+    print('ERROR: marker 1 not found')
+    raise SystemExit(1)
+
+MARKER_2 = '          if (!chunkAbortCtl) return res\n          return wrapSSE(res, chunkTimeout, chunkAbortCtl)'
+PATCH_RETURN = '          const patched = patchToolCallIds(res, model.api.npm)\n          if (!chunkAbortCtl) return patched\n          return wrapSSE(patched, chunkTimeout, chunkAbortCtl)'
+
+if MARKER_2 in src:
+    src = src.replace(MARKER_2, PATCH_RETURN, 1)
+    print('OK: patched fetch return')
+else:
+    print('ERROR: marker 2 not found')
+    raise SystemExit(1)
+
+with open(path, 'w') as f:
+    f.write(src)
+print('DONE')