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[BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented #259

Closed
Feature
#270
Closed
[BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented#259
Feature
#270
Assignees
AbhiPrasad
Labels
bot-automationintegration: anthropic

Description

@braintrust-bot
braintrust-bot
bot
opened on Apr 13, 2026

Summary

The Anthropic Managed Agents API is not instrumented. Calls to client.beta.agents.create(), client.beta.sessions.create(), and session event streaming produce zero Braintrust tracing. These are documented, production-accessible APIs on the Anthropic platform (public beta since April 8, 2026).

The Braintrust Anthropic integration wraps client.messages, client.beta.messages, and their .batches sub-resources. The Beta and AsyncBeta wrapper classes only expose a messages property — any access to client.beta.agents or client.beta.sessions falls through via Wrapper.__getattr__ to the unwrapped SDK, bypassing tracing entirely.

What is missing

Anthropic ResourceMethodInstrumented?
client.messagescreate(), stream()Yes
client.beta.messagescreate(), stream()Yes
client.messages.batchescreate(), results()Yes
client.beta.agentscreate(), retrieve(), list(), update(), delete()No
client.beta.sessionscreate(), retrieve(), list()No
client.beta.sessions.eventscreate(), stream(), list()No

Why this matters

Managed Agents is an agentic execution surface — not a CRUD management API. When a session runs, Claude autonomously executes multi-step tool-calling workflows (bash, file I/O, web search, MCP servers, code execution) with SSE-streamed events. This is functionally equivalent to the agent frameworks this repo already instruments (Pydantic AI, Agno, Google ADK, OpenAI Agents SDK, Claude Agent SDK).

At minimum, instrumentation should provide:

  • Session-level span (type task): created when a session starts, capturing agent config, model, total duration, and aggregate token usage
  • Event-level detail: user turns, assistant turns (with tool calls), tool results, status updates
  • Token metrics: prompt tokens, completion tokens, cache read/creation tokens from session usage

How the gap manifests in code

AsyncBeta (line 128) and Beta (line 188) in tracing.py:

class AsyncBeta(Wrapper):
def __init__(self, beta):
super().__init__(beta)
self.__beta = beta
@property
def messages(self):
return AsyncMessages(self.__beta.messages)
# No agents or sessions properties — falls through to Wrapper.__getattr__

Relationship to existing issues

This is the Anthropic-native equivalent of the agentic execution instrumentation already provided for:

  • OpenAI Agents SDK — BraintrustTracingProcessor captures agent runs, tool calls, handoffs
  • Pydantic AI — Agent.run(), tool manager, streaming instrumented
  • Claude Agent SDK — subprocess-based ClaudeSDKClient instrumented
  • Agno — Agent.run(), Team.run(), Workflow.execute() instrumented
  • Google ADK — BaseAgent.run_async(), Runner.run(), flow + tool execution instrumented

Managed Agents is distinct from the Claude Agent SDK integration (#149) — the latter instruments the subprocess-based claude-agent-sdk-python package, while this API is a first-party HTTP endpoint on api.anthropic.com.

Braintrust docs status

not_found — The Anthropic integration page covers Messages API tracing, evaluations, tool use, and the gateway. No mention of Managed Agents, client.beta.agents, or session-based execution.

Upstream sources

Local files inspected

  • py/src/braintrust/integrations/anthropic/tracing.py — AsyncBeta (line 128) and Beta (line 188) only define a messages property; no agents or sessions properties; unwrapped access falls through via Wrapper.__getattr__
  • py/src/braintrust/integrations/anthropic/patchers.py — patches Anthropic.__init__ and AsyncAnthropic.__init__; no agent/session-specific patchers
  • py/src/braintrust/integrations/anthropic/integration.py — registers init patchers only
  • py/src/braintrust/integrations/anthropic/test_anthropic.py — no test cases for managed agents or sessions
  • py/noxfile.py — test_anthropic sessions test against LATEST, 0.50.0, 0.49.0, 0.48.0; no managed agents coverage

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Labels

bot-automationintegration: anthropic

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[BOT ISSUE] Anthropic: Managed Agents API (`client.beta.agents`, `client.beta.sessions`) not instrumented · Issue #259 · braintrustdata/braintrust-sdk-python · GitHub
    Skip to content
    [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented #259
    Closed
    Feature
    #270
    Closed
    [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented#259
    Feature
    #270
    Assignees
    AbhiPrasad
    Labels
    bot-automationintegration: anthropic
    Description
    @braintrust-bot
    braintrust-bot
    bot
    opened on Apr 13, 2026
    Summary
    The Anthropic Managed Agents API is not instrumented. Calls to client.beta.agents.create(), client.beta.sessions.create(), and session event streaming produce zero Braintrust tracing. These are documented, production-accessible APIs on the Anthropic platform (public beta since April 8, 2026).
    The Braintrust Anthropic integration wraps client.messages, client.beta.messages, and their .batches sub-resources. The Beta and AsyncBeta wrapper classes only expose a messages property — any access to client.beta.agents or client.beta.sessions falls through via Wrapper.__getattr__ to the unwrapped SDK, bypassing tracing entirely.
    What is missing
    Anthropic ResourceMethodInstrumented?
    client.messagescreate(), stream()Yes
    client.beta.messagescreate(), stream()Yes
    client.messages.batchescreate(), results()Yes
    client.beta.agentscreate(), retrieve(), list(), update(), delete()No
    client.beta.sessionscreate(), retrieve(), list()No
    client.beta.sessions.eventscreate(), stream(), list()No
    Why this matters
    Managed Agents is an agentic execution surface — not a CRUD management API. When a session runs, Claude autonomously executes multi-step tool-calling workflows (bash, file I/O, web search, MCP servers, code execution) with SSE-streamed events. This is functionally equivalent to the agent frameworks this repo already instruments (Pydantic AI, Agno, Google ADK, OpenAI Agents SDK, Claude Agent SDK).
    At minimum, instrumentation should provide:
    • Session-level span (type task): created when a session starts, capturing agent config, model, total duration, and aggregate token usage
    • Event-level detail: user turns, assistant turns (with tool calls), tool results, status updates
    • Token metrics: prompt tokens, completion tokens, cache read/creation tokens from session usage
    How the gap manifests in code
    AsyncBeta (line 128) and Beta (line 188) in tracing.py:
    class AsyncBeta(Wrapper):
def __init__(self, beta):
super().__init__(beta)
self.__beta = beta
@property
def messages(self):
return AsyncMessages(self.__beta.messages)
# No agents or sessions properties — falls through to Wrapper.__getattr__

    Relationship to existing issues
    This is the Anthropic-native equivalent of the agentic execution instrumentation already provided for:
    • OpenAI Agents SDK — BraintrustTracingProcessor captures agent runs, tool calls, handoffs
    • Pydantic AI — Agent.run(), tool manager, streaming instrumented
    • Claude Agent SDK — subprocess-based ClaudeSDKClient instrumented
    • Agno — Agent.run(), Team.run(), Workflow.execute() instrumented
    • Google ADK — BaseAgent.run_async(), Runner.run(), flow + tool execution instrumented
    Managed Agents is distinct from the Claude Agent SDK integration (#149) — the latter instruments the subprocess-based claude-agent-sdk-python package, while this API is a first-party HTTP endpoint on api.anthropic.com.
    Braintrust docs status
    not_found — The Anthropic integration page covers Messages API tracing, evaluations, tool use, and the gateway. No mention of Managed Agents, client.beta.agents, or session-based execution.
    Upstream sources
    Local files inspected
    • py/src/braintrust/integrations/anthropic/tracing.py — AsyncBeta (line 128) and Beta (line 188) only define a messages property; no agents or sessions properties; unwrapped access falls through via Wrapper.__getattr__
    • py/src/braintrust/integrations/anthropic/patchers.py — patches Anthropic.__init__ and AsyncAnthropic.__init__; no agent/session-specific patchers
    • py/src/braintrust/integrations/anthropic/integration.py — registers init patchers only
    • py/src/braintrust/integrations/anthropic/test_anthropic.py — no test cases for managed agents or sessions
    • py/noxfile.py — test_anthropic sessions test against LATEST, 0.50.0, 0.49.0, 0.48.0; no managed agents coverage
    Metadata
    Metadata
    Assignees
    Labels
    bot-automationintegration: anthropic
    Type
    Feature
    Projects
    No projects
      Milestone
      No milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
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[BOT ISSUE] Anthropic: Managed Agents API (`client.beta.agents`, `client.beta.sessions`) not instrumented · Issue #259 · braintrustdata/braintrust-sdk-python · GitHub
      Skip to content
      [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented #259
      Closed
      Feature
      #270
      Closed
      [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented#259
      Feature
      #270
      Assignees
      AbhiPrasad
      Labels
      bot-automationintegration: anthropic
      Description
      @braintrust-bot
      braintrust-bot
      bot
      opened on Apr 13, 2026
      Summary
      The Anthropic Managed Agents API is not instrumented. Calls to client.beta.agents.create(), client.beta.sessions.create(), and session event streaming produce zero Braintrust tracing. These are documented, production-accessible APIs on the Anthropic platform (public beta since April 8, 2026).
      The Braintrust Anthropic integration wraps client.messages, client.beta.messages, and their .batches sub-resources. The Beta and AsyncBeta wrapper classes only expose a messages property — any access to client.beta.agents or client.beta.sessions falls through via Wrapper.__getattr__ to the unwrapped SDK, bypassing tracing entirely.
      What is missing
      Anthropic ResourceMethodInstrumented?
      client.messagescreate(), stream()Yes
      client.beta.messagescreate(), stream()Yes
      client.messages.batchescreate(), results()Yes
      client.beta.agentscreate(), retrieve(), list(), update(), delete()No
      client.beta.sessionscreate(), retrieve(), list()No
      client.beta.sessions.eventscreate(), stream(), list()No
      Why this matters
      Managed Agents is an agentic execution surface — not a CRUD management API. When a session runs, Claude autonomously executes multi-step tool-calling workflows (bash, file I/O, web search, MCP servers, code execution) with SSE-streamed events. This is functionally equivalent to the agent frameworks this repo already instruments (Pydantic AI, Agno, Google ADK, OpenAI Agents SDK, Claude Agent SDK).
      At minimum, instrumentation should provide:
      • Session-level span (type task): created when a session starts, capturing agent config, model, total duration, and aggregate token usage
      • Event-level detail: user turns, assistant turns (with tool calls), tool results, status updates
      • Token metrics: prompt tokens, completion tokens, cache read/creation tokens from session usage
      How the gap manifests in code
      AsyncBeta (line 128) and Beta (line 188) in tracing.py:
      class AsyncBeta(Wrapper):
def __init__(self, beta):
super().__init__(beta)
self.__beta = beta
@property
def messages(self):
return AsyncMessages(self.__beta.messages)
# No agents or sessions properties — falls through to Wrapper.__getattr__

      Relationship to existing issues
      This is the Anthropic-native equivalent of the agentic execution instrumentation already provided for:
      • OpenAI Agents SDK — BraintrustTracingProcessor captures agent runs, tool calls, handoffs
      • Pydantic AI — Agent.run(), tool manager, streaming instrumented
      • Claude Agent SDK — subprocess-based ClaudeSDKClient instrumented
      • Agno — Agent.run(), Team.run(), Workflow.execute() instrumented
      • Google ADK — BaseAgent.run_async(), Runner.run(), flow + tool execution instrumented
      Managed Agents is distinct from the Claude Agent SDK integration (#149) — the latter instruments the subprocess-based claude-agent-sdk-python package, while this API is a first-party HTTP endpoint on api.anthropic.com.
      Braintrust docs status
      not_found — The Anthropic integration page covers Messages API tracing, evaluations, tool use, and the gateway. No mention of Managed Agents, client.beta.agents, or session-based execution.
      Upstream sources
      Local files inspected
      • py/src/braintrust/integrations/anthropic/tracing.py — AsyncBeta (line 128) and Beta (line 188) only define a messages property; no agents or sessions properties; unwrapped access falls through via Wrapper.__getattr__
      • py/src/braintrust/integrations/anthropic/patchers.py — patches Anthropic.__init__ and AsyncAnthropic.__init__; no agent/session-specific patchers
      • py/src/braintrust/integrations/anthropic/integration.py — registers init patchers only
      • py/src/braintrust/integrations/anthropic/test_anthropic.py — no test cases for managed agents or sessions
      • py/noxfile.py — test_anthropic sessions test against LATEST, 0.50.0, 0.49.0, 0.48.0; no managed agents coverage
      Metadata
      Metadata
      Assignees
      Labels
      bot-automationintegration: anthropic
      Type
      Feature
      Projects
      No projects
        Milestone
        No milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
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[BOT ISSUE] Anthropic: Managed Agents API (`client.beta.agents`, `client.beta.sessions`) not instrumented · Issue #259 · braintrustdata/braintrust-sdk-python · GitHub
        Skip to content
        [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented #259
        Closed
        Feature
        #270
        Closed
        [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented#259
        Feature
        #270
        Assignees
        AbhiPrasad
        Labels
        bot-automationintegration: anthropic
        Description
        @braintrust-bot
        braintrust-bot
        bot
        opened on Apr 13, 2026
        Summary
        The Anthropic Managed Agents API is not instrumented. Calls to client.beta.agents.create(), client.beta.sessions.create(), and session event streaming produce zero Braintrust tracing. These are documented, production-accessible APIs on the Anthropic platform (public beta since April 8, 2026).
        The Braintrust Anthropic integration wraps client.messages, client.beta.messages, and their .batches sub-resources. The Beta and AsyncBeta wrapper classes only expose a messages property — any access to client.beta.agents or client.beta.sessions falls through via Wrapper.__getattr__ to the unwrapped SDK, bypassing tracing entirely.
        What is missing
        Anthropic ResourceMethodInstrumented?
        client.messagescreate(), stream()Yes
        client.beta.messagescreate(), stream()Yes
        client.messages.batchescreate(), results()Yes
        client.beta.agentscreate(), retrieve(), list(), update(), delete()No
        client.beta.sessionscreate(), retrieve(), list()No
        client.beta.sessions.eventscreate(), stream(), list()No
        Why this matters
        Managed Agents is an agentic execution surface — not a CRUD management API. When a session runs, Claude autonomously executes multi-step tool-calling workflows (bash, file I/O, web search, MCP servers, code execution) with SSE-streamed events. This is functionally equivalent to the agent frameworks this repo already instruments (Pydantic AI, Agno, Google ADK, OpenAI Agents SDK, Claude Agent SDK).
        At minimum, instrumentation should provide:
        • Session-level span (type task): created when a session starts, capturing agent config, model, total duration, and aggregate token usage
        • Event-level detail: user turns, assistant turns (with tool calls), tool results, status updates
        • Token metrics: prompt tokens, completion tokens, cache read/creation tokens from session usage
        How the gap manifests in code
        AsyncBeta (line 128) and Beta (line 188) in tracing.py:
        class AsyncBeta(Wrapper):
def __init__(self, beta):
super().__init__(beta)
self.__beta = beta
@property
def messages(self):
return AsyncMessages(self.__beta.messages)
# No agents or sessions properties — falls through to Wrapper.__getattr__

        Relationship to existing issues
        This is the Anthropic-native equivalent of the agentic execution instrumentation already provided for:
        • OpenAI Agents SDK — BraintrustTracingProcessor captures agent runs, tool calls, handoffs
        • Pydantic AI — Agent.run(), tool manager, streaming instrumented
        • Claude Agent SDK — subprocess-based ClaudeSDKClient instrumented
        • Agno — Agent.run(), Team.run(), Workflow.execute() instrumented
        • Google ADK — BaseAgent.run_async(), Runner.run(), flow + tool execution instrumented
        Managed Agents is distinct from the Claude Agent SDK integration (#149) — the latter instruments the subprocess-based claude-agent-sdk-python package, while this API is a first-party HTTP endpoint on api.anthropic.com.
        Braintrust docs status
        not_found — The Anthropic integration page covers Messages API tracing, evaluations, tool use, and the gateway. No mention of Managed Agents, client.beta.agents, or session-based execution.
        Upstream sources
        Local files inspected
        • py/src/braintrust/integrations/anthropic/tracing.py — AsyncBeta (line 128) and Beta (line 188) only define a messages property; no agents or sessions properties; unwrapped access falls through via Wrapper.__getattr__
        • py/src/braintrust/integrations/anthropic/patchers.py — patches Anthropic.__init__ and AsyncAnthropic.__init__; no agent/session-specific patchers
        • py/src/braintrust/integrations/anthropic/integration.py — registers init patchers only
        • py/src/braintrust/integrations/anthropic/test_anthropic.py — no test cases for managed agents or sessions
        • py/noxfile.py — test_anthropic sessions test against LATEST, 0.50.0, 0.49.0, 0.48.0; no managed agents coverage
        Metadata
        Metadata
        Assignees
        Labels
        bot-automationintegration: anthropic
        Type
        Feature
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
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[BOT ISSUE] Anthropic: Managed Agents API (`client.beta.agents`, `client.beta.sessions`) not instrumented · Issue #259 · braintrustdata/braintrust-sdk-python · GitHub
          Skip to content
          [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented #259
          Closed
          Feature
          #270
          Closed
          [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented#259
          Feature
          #270
          Assignees
          AbhiPrasad
          Labels
          bot-automationintegration: anthropic
          Description
          @braintrust-bot
          braintrust-bot
          bot
          opened on Apr 13, 2026
          Summary
          The Anthropic Managed Agents API is not instrumented. Calls to client.beta.agents.create(), client.beta.sessions.create(), and session event streaming produce zero Braintrust tracing. These are documented, production-accessible APIs on the Anthropic platform (public beta since April 8, 2026).
          The Braintrust Anthropic integration wraps client.messages, client.beta.messages, and their .batches sub-resources. The Beta and AsyncBeta wrapper classes only expose a messages property — any access to client.beta.agents or client.beta.sessions falls through via Wrapper.__getattr__ to the unwrapped SDK, bypassing tracing entirely.
          What is missing
          Anthropic ResourceMethodInstrumented?
          client.messagescreate(), stream()Yes
          client.beta.messagescreate(), stream()Yes
          client.messages.batchescreate(), results()Yes
          client.beta.agentscreate(), retrieve(), list(), update(), delete()No
          client.beta.sessionscreate(), retrieve(), list()No
          client.beta.sessions.eventscreate(), stream(), list()No
          Why this matters
          Managed Agents is an agentic execution surface — not a CRUD management API. When a session runs, Claude autonomously executes multi-step tool-calling workflows (bash, file I/O, web search, MCP servers, code execution) with SSE-streamed events. This is functionally equivalent to the agent frameworks this repo already instruments (Pydantic AI, Agno, Google ADK, OpenAI Agents SDK, Claude Agent SDK).
          At minimum, instrumentation should provide:
          • Session-level span (type task): created when a session starts, capturing agent config, model, total duration, and aggregate token usage
          • Event-level detail: user turns, assistant turns (with tool calls), tool results, status updates
          • Token metrics: prompt tokens, completion tokens, cache read/creation tokens from session usage
          How the gap manifests in code
          AsyncBeta (line 128) and Beta (line 188) in tracing.py:
          class AsyncBeta(Wrapper):
def __init__(self, beta):
super().__init__(beta)
self.__beta = beta
@property
def messages(self):
return AsyncMessages(self.__beta.messages)
# No agents or sessions properties — falls through to Wrapper.__getattr__

          Relationship to existing issues
          This is the Anthropic-native equivalent of the agentic execution instrumentation already provided for:
          • OpenAI Agents SDK — BraintrustTracingProcessor captures agent runs, tool calls, handoffs
          • Pydantic AI — Agent.run(), tool manager, streaming instrumented
          • Claude Agent SDK — subprocess-based ClaudeSDKClient instrumented
          • Agno — Agent.run(), Team.run(), Workflow.execute() instrumented
          • Google ADK — BaseAgent.run_async(), Runner.run(), flow + tool execution instrumented
          Managed Agents is distinct from the Claude Agent SDK integration (#149) — the latter instruments the subprocess-based claude-agent-sdk-python package, while this API is a first-party HTTP endpoint on api.anthropic.com.
          Braintrust docs status
          not_found — The Anthropic integration page covers Messages API tracing, evaluations, tool use, and the gateway. No mention of Managed Agents, client.beta.agents, or session-based execution.
          Upstream sources
          Local files inspected
          • py/src/braintrust/integrations/anthropic/tracing.py — AsyncBeta (line 128) and Beta (line 188) only define a messages property; no agents or sessions properties; unwrapped access falls through via Wrapper.__getattr__
          • py/src/braintrust/integrations/anthropic/patchers.py — patches Anthropic.__init__ and AsyncAnthropic.__init__; no agent/session-specific patchers
          • py/src/braintrust/integrations/anthropic/integration.py — registers init patchers only
          • py/src/braintrust/integrations/anthropic/test_anthropic.py — no test cases for managed agents or sessions
          • py/noxfile.py — test_anthropic sessions test against LATEST, 0.50.0, 0.49.0, 0.48.0; no managed agents coverage
          Metadata
          Metadata
          Assignees
          Labels
          bot-automationintegration: anthropic
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[BOT ISSUE] Anthropic: Managed Agents API (`client.beta.agents`, `client.beta.sessions`) not instrumented · Issue #259 · braintrustdata/braintrust-sdk-python · GitHub
            Skip to content
            [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented #259
            Closed
            Feature
            #270
            Closed
            [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented#259
            Feature
            #270
            Assignees
            AbhiPrasad
            Labels
            bot-automationintegration: anthropic
            Description
            @braintrust-bot
            braintrust-bot
            bot
            opened on Apr 13, 2026
            Summary
            The Anthropic Managed Agents API is not instrumented. Calls to client.beta.agents.create(), client.beta.sessions.create(), and session event streaming produce zero Braintrust tracing. These are documented, production-accessible APIs on the Anthropic platform (public beta since April 8, 2026).
            The Braintrust Anthropic integration wraps client.messages, client.beta.messages, and their .batches sub-resources. The Beta and AsyncBeta wrapper classes only expose a messages property — any access to client.beta.agents or client.beta.sessions falls through via Wrapper.__getattr__ to the unwrapped SDK, bypassing tracing entirely.
            What is missing
            Anthropic ResourceMethodInstrumented?
            client.messagescreate(), stream()Yes
            client.beta.messagescreate(), stream()Yes
            client.messages.batchescreate(), results()Yes
            client.beta.agentscreate(), retrieve(), list(), update(), delete()No
            client.beta.sessionscreate(), retrieve(), list()No
            client.beta.sessions.eventscreate(), stream(), list()No
            Why this matters
            Managed Agents is an agentic execution surface — not a CRUD management API. When a session runs, Claude autonomously executes multi-step tool-calling workflows (bash, file I/O, web search, MCP servers, code execution) with SSE-streamed events. This is functionally equivalent to the agent frameworks this repo already instruments (Pydantic AI, Agno, Google ADK, OpenAI Agents SDK, Claude Agent SDK).
            At minimum, instrumentation should provide:
            • Session-level span (type task): created when a session starts, capturing agent config, model, total duration, and aggregate token usage
            • Event-level detail: user turns, assistant turns (with tool calls), tool results, status updates
            • Token metrics: prompt tokens, completion tokens, cache read/creation tokens from session usage
            How the gap manifests in code
            AsyncBeta (line 128) and Beta (line 188) in tracing.py:
            class AsyncBeta(Wrapper):
def __init__(self, beta):
super().__init__(beta)
self.__beta = beta
@property
def messages(self):
return AsyncMessages(self.__beta.messages)
# No agents or sessions properties — falls through to Wrapper.__getattr__

            Relationship to existing issues
            This is the Anthropic-native equivalent of the agentic execution instrumentation already provided for:
            • OpenAI Agents SDK — BraintrustTracingProcessor captures agent runs, tool calls, handoffs
            • Pydantic AI — Agent.run(), tool manager, streaming instrumented
            • Claude Agent SDK — subprocess-based ClaudeSDKClient instrumented
            • Agno — Agent.run(), Team.run(), Workflow.execute() instrumented
            • Google ADK — BaseAgent.run_async(), Runner.run(), flow + tool execution instrumented
            Managed Agents is distinct from the Claude Agent SDK integration (#149) — the latter instruments the subprocess-based claude-agent-sdk-python package, while this API is a first-party HTTP endpoint on api.anthropic.com.
            Braintrust docs status
            not_found — The Anthropic integration page covers Messages API tracing, evaluations, tool use, and the gateway. No mention of Managed Agents, client.beta.agents, or session-based execution.
            Upstream sources
            Local files inspected
            • py/src/braintrust/integrations/anthropic/tracing.py — AsyncBeta (line 128) and Beta (line 188) only define a messages property; no agents or sessions properties; unwrapped access falls through via Wrapper.__getattr__
            • py/src/braintrust/integrations/anthropic/patchers.py — patches Anthropic.__init__ and AsyncAnthropic.__init__; no agent/session-specific patchers
            • py/src/braintrust/integrations/anthropic/integration.py — registers init patchers only
            • py/src/braintrust/integrations/anthropic/test_anthropic.py — no test cases for managed agents or sessions
            • py/noxfile.py — test_anthropic sessions test against LATEST, 0.50.0, 0.49.0, 0.48.0; no managed agents coverage
            Metadata
            Metadata
            Assignees
            Labels
            bot-automationintegration: anthropic
            Type
            Feature
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
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(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
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var __m = "*";
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[BOT ISSUE] Anthropic: Managed Agents API (`client.beta.agents`, `client.beta.sessions`) not instrumented · Issue #259 · braintrustdata/braintrust-sdk-python · GitHub
              Skip to content
              [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented #259
              Closed
              Feature
              #270
              Closed
              [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented#259
              Feature
              #270
              Assignees
              AbhiPrasad
              Labels
              bot-automationintegration: anthropic
              Description
              @braintrust-bot
              braintrust-bot
              bot
              opened on Apr 13, 2026
              Summary
              The Anthropic Managed Agents API is not instrumented. Calls to client.beta.agents.create(), client.beta.sessions.create(), and session event streaming produce zero Braintrust tracing. These are documented, production-accessible APIs on the Anthropic platform (public beta since April 8, 2026).
              The Braintrust Anthropic integration wraps client.messages, client.beta.messages, and their .batches sub-resources. The Beta and AsyncBeta wrapper classes only expose a messages property — any access to client.beta.agents or client.beta.sessions falls through via Wrapper.__getattr__ to the unwrapped SDK, bypassing tracing entirely.
              What is missing
              Anthropic ResourceMethodInstrumented?
              client.messagescreate(), stream()Yes
              client.beta.messagescreate(), stream()Yes
              client.messages.batchescreate(), results()Yes
              client.beta.agentscreate(), retrieve(), list(), update(), delete()No
              client.beta.sessionscreate(), retrieve(), list()No
              client.beta.sessions.eventscreate(), stream(), list()No
              Why this matters
              Managed Agents is an agentic execution surface — not a CRUD management API. When a session runs, Claude autonomously executes multi-step tool-calling workflows (bash, file I/O, web search, MCP servers, code execution) with SSE-streamed events. This is functionally equivalent to the agent frameworks this repo already instruments (Pydantic AI, Agno, Google ADK, OpenAI Agents SDK, Claude Agent SDK).
              At minimum, instrumentation should provide:
              • Session-level span (type task): created when a session starts, capturing agent config, model, total duration, and aggregate token usage
              • Event-level detail: user turns, assistant turns (with tool calls), tool results, status updates
              • Token metrics: prompt tokens, completion tokens, cache read/creation tokens from session usage
              How the gap manifests in code
              AsyncBeta (line 128) and Beta (line 188) in tracing.py:
              class AsyncBeta(Wrapper):
def __init__(self, beta):
super().__init__(beta)
self.__beta = beta
@property
def messages(self):
return AsyncMessages(self.__beta.messages)
# No agents or sessions properties — falls through to Wrapper.__getattr__

              Relationship to existing issues
              This is the Anthropic-native equivalent of the agentic execution instrumentation already provided for:
              • OpenAI Agents SDK — BraintrustTracingProcessor captures agent runs, tool calls, handoffs
              • Pydantic AI — Agent.run(), tool manager, streaming instrumented
              • Claude Agent SDK — subprocess-based ClaudeSDKClient instrumented
              • Agno — Agent.run(), Team.run(), Workflow.execute() instrumented
              • Google ADK — BaseAgent.run_async(), Runner.run(), flow + tool execution instrumented
              Managed Agents is distinct from the Claude Agent SDK integration (#149) — the latter instruments the subprocess-based claude-agent-sdk-python package, while this API is a first-party HTTP endpoint on api.anthropic.com.
              Braintrust docs status
              not_found — The Anthropic integration page covers Messages API tracing, evaluations, tool use, and the gateway. No mention of Managed Agents, client.beta.agents, or session-based execution.
              Upstream sources
              Local files inspected
              • py/src/braintrust/integrations/anthropic/tracing.py — AsyncBeta (line 128) and Beta (line 188) only define a messages property; no agents or sessions properties; unwrapped access falls through via Wrapper.__getattr__
              • py/src/braintrust/integrations/anthropic/patchers.py — patches Anthropic.__init__ and AsyncAnthropic.__init__; no agent/session-specific patchers
              • py/src/braintrust/integrations/anthropic/integration.py — registers init patchers only
              • py/src/braintrust/integrations/anthropic/test_anthropic.py — no test cases for managed agents or sessions
              • py/noxfile.py — test_anthropic sessions test against LATEST, 0.50.0, 0.49.0, 0.48.0; no managed agents coverage
              Metadata
              Metadata
              Assignees
              Labels
              bot-automationintegration: anthropic
              Type
              Feature
              Projects
              No projects
                Milestone
                No milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
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background: #1a1a2e !important;
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filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
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[data-theme="light"], [data-theme="light"],
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filter: invert(1) hue-rotate(180deg) !important;
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[BOT ISSUE] Anthropic: Managed Agents API (`client.beta.agents`, `client.beta.sessions`) not instrumented · Issue #259 · braintrustdata/braintrust-sdk-python · GitHub
                Skip to content
                [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented #259
                Closed
                Feature
                #270
                Closed
                [BOT ISSUE] Anthropic: Managed Agents API (client.beta.agents, client.beta.sessions) not instrumented#259
                Feature
                #270
                Assignees
                AbhiPrasad
                Labels
                bot-automationintegration: anthropic
                Description
                @braintrust-bot
                braintrust-bot
                bot
                opened on Apr 13, 2026
                Summary
                The Anthropic Managed Agents API is not instrumented. Calls to client.beta.agents.create(), client.beta.sessions.create(), and session event streaming produce zero Braintrust tracing. These are documented, production-accessible APIs on the Anthropic platform (public beta since April 8, 2026).
                The Braintrust Anthropic integration wraps client.messages, client.beta.messages, and their .batches sub-resources. The Beta and AsyncBeta wrapper classes only expose a messages property — any access to client.beta.agents or client.beta.sessions falls through via Wrapper.__getattr__ to the unwrapped SDK, bypassing tracing entirely.
                What is missing
                Anthropic ResourceMethodInstrumented?
                client.messagescreate(), stream()Yes
                client.beta.messagescreate(), stream()Yes
                client.messages.batchescreate(), results()Yes
                client.beta.agentscreate(), retrieve(), list(), update(), delete()No
                client.beta.sessionscreate(), retrieve(), list()No
                client.beta.sessions.eventscreate(), stream(), list()No
                Why this matters
                Managed Agents is an agentic execution surface — not a CRUD management API. When a session runs, Claude autonomously executes multi-step tool-calling workflows (bash, file I/O, web search, MCP servers, code execution) with SSE-streamed events. This is functionally equivalent to the agent frameworks this repo already instruments (Pydantic AI, Agno, Google ADK, OpenAI Agents SDK, Claude Agent SDK).
                At minimum, instrumentation should provide:
                • Session-level span (type task): created when a session starts, capturing agent config, model, total duration, and aggregate token usage
                • Event-level detail: user turns, assistant turns (with tool calls), tool results, status updates
                • Token metrics: prompt tokens, completion tokens, cache read/creation tokens from session usage
                How the gap manifests in code
                AsyncBeta (line 128) and Beta (line 188) in tracing.py:
                class AsyncBeta(Wrapper):
def __init__(self, beta):
super().__init__(beta)
self.__beta = beta
@property
def messages(self):
return AsyncMessages(self.__beta.messages)
# No agents or sessions properties — falls through to Wrapper.__getattr__

                Relationship to existing issues
                This is the Anthropic-native equivalent of the agentic execution instrumentation already provided for:
                • OpenAI Agents SDK — BraintrustTracingProcessor captures agent runs, tool calls, handoffs
                • Pydantic AI — Agent.run(), tool manager, streaming instrumented
                • Claude Agent SDK — subprocess-based ClaudeSDKClient instrumented
                • Agno — Agent.run(), Team.run(), Workflow.execute() instrumented
                • Google ADK — BaseAgent.run_async(), Runner.run(), flow + tool execution instrumented
                Managed Agents is distinct from the Claude Agent SDK integration (#149) — the latter instruments the subprocess-based claude-agent-sdk-python package, while this API is a first-party HTTP endpoint on api.anthropic.com.
                Braintrust docs status
                not_found — The Anthropic integration page covers Messages API tracing, evaluations, tool use, and the gateway. No mention of Managed Agents, client.beta.agents, or session-based execution.
                Upstream sources
                Local files inspected
                • py/src/braintrust/integrations/anthropic/tracing.py — AsyncBeta (line 128) and Beta (line 188) only define a messages property; no agents or sessions properties; unwrapped access falls through via Wrapper.__getattr__
                • py/src/braintrust/integrations/anthropic/patchers.py — patches Anthropic.__init__ and AsyncAnthropic.__init__; no agent/session-specific patchers
                • py/src/braintrust/integrations/anthropic/integration.py — registers init patchers only
                • py/src/braintrust/integrations/anthropic/test_anthropic.py — no test cases for managed agents or sessions
                • py/noxfile.py — test_anthropic sessions test against LATEST, 0.50.0, 0.49.0, 0.48.0; no managed agents coverage
                Metadata
                Metadata
                Assignees
                Labels
                bot-automationintegration: anthropic
                Type
                Feature
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions