diff --git a/src/components/CostThresholdDialog.tsx b/src/components/CostThresholdDialog.tsx
index 59c2c582..7c21becd 100644
--- a/src/components/CostThresholdDialog.tsx
+++ b/src/components/CostThresholdDialog.tsx
@@ -1,50 +1,53 @@
-import { c as _c } from "react-compiler-runtime";
-import React from 'react';
-import { Box, Link, Text } from '../ink.js';
-import { Select } from './CustomSelect/index.js';
-import { Dialog } from './design-system/Dialog.js';
+import React from 'react'
+import { Box, Link, Text } from '../ink.js'
+import { Select } from './CustomSelect/index.js'
+import { Dialog } from './design-system/Dialog.js'
+import { getAPIProvider } from '../utils/model/providers.js'
+
 type Props = {
-  onDone: () => void;
-};
-export function CostThresholdDialog(t0) {
-  const $ = _c(7);
-  const {
-    onDone
-  } = t0;
-  let t1;
-  if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
-    t1 = <Box flexDirection="column"><Text>Learn more about how to monitor your spending:</Text><Link url="https://code.claude.com/docs/en/costs" /></Box>;
-    $[0] = t1;
-  } else {
-    t1 = $[0];
-  }
-  let t2;
-  if ($[1] === Symbol.for("react.memo_cache_sentinel")) {
-    t2 = [{
-      value: "ok",
-      label: "Got it, thanks!"
-    }];
-    $[1] = t2;
-  } else {
-    t2 = $[1];
-  }
-  let t3;
-  if ($[2] !== onDone) {
-    t3 = <Select options={t2} onChange={onDone} />;
-    $[2] = onDone;
-    $[3] = t3;
-  } else {
-    t3 = $[3];
-  }
-  let t4;
-  if ($[4] !== onDone || $[5] !== t3) {
-    t4 = <Dialog title="You've spent $5 on the Anthropic API this session." onCancel={onDone}>{t1}{t3}</Dialog>;
-    $[4] = onDone;
-    $[5] = t3;
-    $[6] = t4;
-  } else {
-    t4 = $[6];
-  }
-  return t4;
+  onDone: () => void
+}
+
+function getProviderLabel(): string {
+  const provider = getAPIProvider()
+  switch (provider) {
+    case 'firstParty':
+      return 'Anthropic API'
+    case 'bedrock':
+      return 'AWS Bedrock'
+    case 'vertex':
+      return 'Google Vertex'
+    case 'foundry':
+      return 'Azure Foundry'
+    case 'openai':
+      return 'OpenAI-compatible API'
+    case 'gemini':
+      return 'Gemini API'
+    default:
+      return 'API'
+  }
+}
+
+export function CostThresholdDialog({ onDone }: Props): React.ReactNode {
+  const providerLabel = getProviderLabel()
+  return (
+    <Dialog
+      title={`You've spent $5 on the ${providerLabel} this session.`}
+      onCancel={onDone}
+    >
+      <Box flexDirection="column">
+        <Text>Learn more about how to monitor your spending:</Text>
+        <Link url="https://code.claude.com/docs/en/costs" />
+      </Box>
+      <Select
+        options={[
+          {
+            value: 'ok',
+            label: 'Got it, thanks!',
+          },
+        ]}
+        onChange={onDone}
+      />
+    </Dialog>
+  )
 }
-//# sourceMappingURL=data:application/json;charset=utf-8;base64,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
\ No newline at end of file
diff --git a/src/services/api/openaiShim.ts b/src/services/api/openaiShim.ts
index 9a500490..0d5bde28 100644
--- a/src/services/api/openaiShim.ts
+++ b/src/services/api/openaiShim.ts
@@ -235,20 +235,60 @@ function normalizeSchemaForOpenAI(
   schema: Record<string, unknown>,
   strict = true,
 ): Record<string, unknown> {
-  if (schema.type !== 'object' || !schema.properties) return schema
-  const properties = schema.properties as Record<string, unknown>
-  const existingRequired = Array.isArray(schema.required) ? schema.required as string[] : []
-  // OpenAI strict mode requires every property to be listed in required[].
-  // Gemini rejects schemas where required[] contains keys absent from properties,
-  // so only promote keys that actually exist in properties.
-  if (strict) {
-    const allKeys = Object.keys(properties)
-    const required = Array.from(new Set([...existingRequired, ...allKeys]))
-    return { ...schema, required }
+  if (!schema || typeof schema !== 'object' || Array.isArray(schema)) {
+    return (schema ?? {}) as Record<string, unknown>
   }
-  // For Gemini: keep only existing required keys that are present in properties
-  const required = existingRequired.filter(k => k in properties)
-  return { ...schema, required }
+
+  const record = { ...schema }
+
+  if (record.type === 'object' && record.properties) {
+    const properties = record.properties as Record<string, Record<string, unknown>>
+    const existingRequired = Array.isArray(record.required) ? record.required as string[] : []
+
+    // Recurse into each property
+    const normalizedProps: Record<string, unknown> = {}
+    for (const [key, value] of Object.entries(properties)) {
+      normalizedProps[key] = normalizeSchemaForOpenAI(
+        value as Record<string, unknown>,
+        strict,
+      )
+    }
+    record.properties = normalizedProps
+
+    if (strict) {
+      // OpenAI strict mode requires every property to be listed in required[]
+      const allKeys = Object.keys(normalizedProps)
+      record.required = Array.from(new Set([...existingRequired, ...allKeys]))
+      // OpenAI strict mode requires additionalProperties: false on all object
+      // schemas — override unconditionally to ensure nested objects comply.
+      record.additionalProperties = false
+    } else {
+      // For Gemini: keep only existing required keys that are present in properties
+      record.required = existingRequired.filter(k => k in normalizedProps)
+    }
+  }
+
+  // Recurse into array items
+  if ('items' in record) {
+    if (Array.isArray(record.items)) {
+      record.items = (record.items as unknown[]).map(
+        item => normalizeSchemaForOpenAI(item as Record<string, unknown>, strict),
+      )
+    } else {
+      record.items = normalizeSchemaForOpenAI(record.items as Record<string, unknown>, strict)
+    }
+  }
+
+  // Recurse into combinators
+  for (const key of ['anyOf', 'oneOf', 'allOf'] as const) {
+    if (key in record && Array.isArray(record[key])) {
+      record[key] = (record[key] as unknown[]).map(
+        item => normalizeSchemaForOpenAI(item as Record<string, unknown>, strict),
+      )
+    }
+  }
+
+  return record
 }
 
 function convertTools(
@@ -374,15 +414,16 @@ async function* openaiStreamToAnthropic(
   const decoder = new TextDecoder()
   let buffer = ''
 
-  while (true) {
-    const { done, value } = await reader.read()
-    if (done) break
+  try {
+    while (true) {
+      const { done, value } = await reader.read()
+      if (done) break
 
-    buffer += decoder.decode(value, { stream: true })
-    const lines = buffer.split('\n')
-    buffer = lines.pop() ?? ''
+      buffer += decoder.decode(value, { stream: true })
+      const lines = buffer.split('\n')
+      buffer = lines.pop() ?? ''
 
-    for (const line of lines) {
+      for (const line of lines) {
       const trimmed = line.trim()
       if (!trimmed || trimmed === 'data: [DONE]') continue
       if (!trimmed.startsWith('data: ')) continue
@@ -528,6 +569,9 @@ async function* openaiStreamToAnthropic(
         hasEmittedFinalUsage = true
       }
     }
+    }
+  } finally {
+    reader.releaseLock()
   }
 
   yield { type: 'message_stop' }