[bot] Instrument aws-sdk-bedrockagentcore (4,221 weekly downloads)

[braintrust-bot]

Summary

This repo (braintrust-sdk-rust) has no instrumentation at all for Amazon Bedrock AgentCore, AWS's managed agent-execution runtime, despite it being an official, actively-released AWS SDK crate with a meaningful agent-execution API surface (session-based agent invocation, streaming agent output, memory records, code-interpreter and browser tool sessions).

What's missing

• No usage/response extractor for AgentCore's data-plane operations (e.g. InvokeAgentRuntime, StartCodeInterpreterSession/InvokeCodeInterpreter, StartBrowserSession, session/memory APIs).
• No streaming support in BraintrustStream (src/stream.rs) for AgentCore's agent-run streaming output — the module only understands an OpenAI-shaped chunk format (StreamChunk, OutputChoice) plus (per issue history) a partial/buggy attempt at Bedrock's model-invocation ConverseStream shape. AgentCore's runtime-invocation/session event shapes are unrelated to both and are not handled anywhere.
• No mention of "Bedrock" or "AgentCore" anywhere in the codebase (verified via repo-wide case-insensitive search across src/, tests/, examples/, README.md).

Note this is distinct from the already-tracked aws-sdk-bedrockagentruntime ("Agents for Amazon Bedrock", the older agent feature) and the base aws-sdk-bedrockruntime Converse/InvokeModel gap already covered by the existing "BraintrustStream cannot aggregate AWS Bedrock ConverseStream events" issue. Bedrock AgentCore is a separate, newer (GA 2025) product/crate with its own execution surface: a full managed agent runtime with sessions, persistent memory, and built-in code-interpreter/browser tools — squarely an "agent-run" execution surface per this repo's stated instrumentation scope.

Weekly downloads

Weekly downloads: 4,221 (as of 2026-08-31; https://crates.io/api/v1/crates/aws-sdk-bedrockagentcore/downloads)

Computed by summing version_downloads + meta.extra_downloads for the 7 calendar days 2026-08-25 through 2026-08-31 from the crates.io downloads API. Crate metadata (total downloads 58,948, current version 1.65.0, actively released — 66 published versions) via https://crates.io/api/v1/crates/aws-sdk-bedrockagentcore. This is comparable to or above other AWS crates this repo already tracks as instrumentation gaps (e.g. aws-sdk-transcribestreaming at 4,014/week, aws-sdk-polly at 3,227/week).

Upstream sources

• crates.io: https://crates.io/crates/aws-sdk-bedrockagentcore
• docs.rs: https://docs.rs/aws-sdk-bedrockagentcore/latest/aws_sdk_bedrockagentcore/
• Official AWS docs ("Amazon Bedrock AgentCore Data Plane API"): https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/what-is-bedrock-agentcore.html
• Official AWS docs index: https://docs.aws.amazon.com/bedrock-agentcore/
• Source repo (official AWS SDK for Rust monorepo): https://github.com/awslabs/aws-sdk-rust

Braintrust docs check

Checked the current Braintrust AWS Bedrock integration docs: https://www.braintrust.dev/docs/integrations/ai-providers/bedrock

Result: not_found. That page exclusively documents tracing for the base Bedrock Runtime model-invocation API (Converse, ConverseStream, InvokeModel, InvokeModelWithResponseStream). It does not mention Bedrock AgentCore, agent sessions, memory, code-interpreter, or browser-tool execution anywhere. No other page under /docs/integrations/ documents a dedicated Braintrust wrapper for Bedrock AgentCore for any language SDK (the only AgentCore + Braintrust material found is an unofficial third-party blog post showing generic OpenTelemetry pass-through for the Python bedrock-agentcore-sdk, which is not an official Braintrust-documented integration and is unrelated to this Rust crate).

Local repo files inspected

• Cargo.toml (dependency list — no AWS SDK crates of any kind)
• src/extractors.rs (extract_openai_usage, extract_anthropic_usage — no Bedrock/AgentCore handling)
• src/stream.rs (BraintrustStream, StreamChunk, StreamToolCallAccumulator, OutputChoice — OpenAI-shaped only)
• src/types.rs (shared Usage struct — OpenAI/Anthropic field aliases only)
• src/lib.rs (public re-exports)
• tests/span_lifecycle.rs (usage-extractor tests — OpenAI/Anthropic only)
• README.md (documented extractor feature list — OpenAI/Anthropic only)
• Repo-wide case-insensitive grep for Bedrock/AgentCore — zero matches