[fix]: Add bedrock to provider enum in Zod schemas and OpenAPI spec (#1759)

## Summary
- Adds `"bedrock"` to the `provider` enum in `ModelConfigObjectSchema` and `AgentConfigSchema` (Zod schemas in `packages/core/lib/v3/types/public/api.ts`)
- Regenerates `packages/server/openapi.v3.yaml` via `pnpm gen:openapi`

## Context
Bedrock was added to `AISDK_PROVIDERS` and `LLMProvider` in PRs #1604 and #1617, but the Zod schemas that feed the OpenAPI spec (and ultimately the Stainless-generated SDKs) were never updated. This means the Python/Go/etc. SDK type definitions don't include `"bedrock"` as a valid provider option.

Companion PR in bb/core: browserbase/core#7668

## Test plan
- [x] `pnpm gen:openapi` produces updated spec with `bedrock` in all 4 provider enum locations
- [ ] Stainless picks up the OpenAPI change and regenerates SDKs with `bedrock` in the `provider` literal type

🤖 Generated with [Claude Code](https://claude.com/claude-code)

<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Add "bedrock" to provider enums in ModelConfigObjectSchema/AgentConfigSchema and regenerate the OpenAPI spec so SDKs accept it and stay in sync with AISDK_PROVIDERS/LLMProvider. Also update AgentType to include "bedrock" to fix a server build type mismatch, and add a patch changeset to publish and unblock Python/Go SDK type generation.

<sup>Written for commit 88e3372. Summary will update on new commits. <a href="https://cubic.dev/pr/browserbase/stagehand/pull/1759">Review in cubic</a></sup>

<!-- End of auto-generated description by cubic. -->

Author: shrey150

.changeset/add-bedrock-provider-schema.md

@@ -0,0 +1,6 @@
+---
+"@browserbasehq/stagehand": patch
+"@browserbasehq/stagehand-server": patch
+---
+
+Add bedrock to the provider enum in model configuration schemas and regenerate OpenAPI spec.

packages/core/lib/v3/types/public/agent.ts

@@ -418,7 +418,12 @@ export interface AgentStreamExecuteOptions extends AgentExecuteOptionsBase {
    */
   callbacks?: AgentStreamCallbacks;
 }
-export type AgentType = "openai" | "anthropic" | "google" | "microsoft";
+export type AgentType =
+  | "openai"
+  | "anthropic"
+  | "google"
+  | "microsoft"
+  | "bedrock";
 
 export const AVAILABLE_CUA_MODELS = [
   "openai/computer-use-preview",

packages/core/lib/v3/types/public/api.ts

@@ -52,7 +52,7 @@ export const LocalBrowserLaunchOptionsSchema = z
 export const ModelConfigObjectSchema = z
   .object({
     provider: z
-      .enum(["openai", "anthropic", "google", "microsoft"])
+      .enum(["openai", "anthropic", "google", "microsoft", "bedrock"])
       .optional()
       .meta({
         description:
@@ -589,7 +589,7 @@ export const ObserveResponseSchema = wrapResponse(
 export const AgentConfigSchema = z
   .object({
     provider: z // cloud accepts provider: at the top level for legacy reasons, in the future we should remove it
-      .enum(["openai", "anthropic", "google", "microsoft"])
+      .enum(["openai", "anthropic", "google", "microsoft", "bedrock"])
       .optional()
       .meta({
         description:

packages/server/openapi.v3.yaml

@@ -173,6 +173,7 @@ components:
             - anthropic
             - google
             - microsoft
+            - bedrock
         modelName:
           description: Model name string with provider prefix (e.g., 'openai/gpt-5-nano')
           example: openai/gpt-5-nano
@@ -652,6 +653,7 @@ components:
             - anthropic
             - google
             - microsoft
+            - bedrock
         model:
           description: Model configuration object or model name string (e.g.,
             'openai/gpt-5-nano')
@@ -1154,6 +1156,7 @@ components:
             - anthropic
             - google
             - microsoft
+            - bedrock
         modelName:
           description: Model name string with provider prefix (e.g., 'openai/gpt-5-nano')
           example: openai/gpt-5-nano
@@ -1546,6 +1549,7 @@ components:
             - anthropic
             - google
             - microsoft
+            - bedrock
         model:
           description: Model configuration object or model name string (e.g.,
             'openai/gpt-5-nano')