AWS Bedrock Adapter

Wraps Bedrock invoke_model() with LOCO scheduling.

Setup

from loco import AsyncLOCOScheduler, SharedResource
from loco.adapters.aws_bedrock import BedrockAdapter

scheduler = AsyncLOCOScheduler([], SharedResource("bedrock_api", capacity=3))
adapter = BedrockAdapter(scheduler, client=bedrock_runtime_client)

Usage

response = await adapter.invoke(
    "security-scanner",
    model_id="anthropic.claude-sonnet-4-20250514-v1:0",
    body={"messages": [{"role": "user", "content": "Scan this..."}]},
)

Model Weights

Model Family	Weight
Claude Opus	5.0
Claude Sonnet	2.0
Claude Haiku	1.0
Llama 3 70B	3.0
Llama 3 8B	1.0
Titan	1.0
Unknown	2.0 (default)

RETURN_CONTROL Pattern

For Bedrock Agents with action groups, the adapter supports the RETURN_CONTROL pattern where the orchestration loop pauses and LOCO decides when to resume.