feat(runtime): add HTTP invocation and execute_command support to AgentCoreRuntimeClient

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## [Unreleased]
+
+### Added
+- feat(runtime): add HTTP invocation methods (`invoke`, `invoke_streaming`, `invoke_streaming_async`) and `InvokeAgentRuntimeCommand` shell-exec support (`execute_command`, `execute_command_streaming`) to `AgentCoreRuntimeClient`, plus `stop_runtime_session`. Methods take `runtime_arn` and `bearer_token` per-call, matching `generate_ws_connection_oauth`. The `urllib3.PoolManager` is lazy-initialized so SigV4 URL-generation users pay no cost.
+- feat(runtime): add `AgentRuntimeError` exception raised by the HTTP methods on non-2xx responses and in-band SSE error events.
+
 ## [1.6.3] - 2026-04-16
 
 ### Fixed

src/bedrock_agentcore/runtime/__init__.py

@@ -4,15 +4,18 @@
 - BedrockAgentCoreApp: Main application class
 - RequestContext: HTTP request context
 - BedrockAgentCoreContext: Agent identity context
+- AgentCoreRuntimeClient: Authentication + HTTP invocation client for deployed runtimes
+- AgentRuntimeError: Exception raised by the HTTP invocation methods
 """
 
-from .agent_core_runtime_client import AgentCoreRuntimeClient
+from .agent_core_runtime_client import AgentCoreRuntimeClient, AgentRuntimeError
 from .app import BedrockAgentCoreApp
 from .context import BedrockAgentCoreContext, RequestContext
 from .models import PingStatus
 
 __all__ = [
     "AgentCoreRuntimeClient",
+    "AgentRuntimeError",
     "AGUIApp",
     "BedrockAgentCoreApp",
     "BedrockCallContextBuilder",
@@ -29,7 +32,12 @@
 
 def __getattr__(name: str):
     """Lazy imports for A2A and AG-UI symbols so optional dependencies are not required at import time."""
-    _a2a_exports = {"BedrockCallContextBuilder", "build_a2a_app", "build_runtime_url", "serve_a2a"}
+    _a2a_exports = {
+        "BedrockCallContextBuilder",
+        "build_a2a_app",
+        "build_runtime_url",
+        "serve_a2a",
+    }
     if name in _a2a_exports:
         from . import a2a as _a2a_module