[123XieC]

Motivation & Context

Same root cause as #9808 (AnthropicClient, fixed by #9859), in two more connectors that #9859 did not touch.

• BedrockChatClient._parse_usage maps Converse inputTokens to input_token_count. With prompt caching, Bedrock reports cache reads/writes separately in cacheReadInputTokens / cacheWriteInputTokens, and inputTokens covers only the uncached part. So on main the usage is internally inconsistent (input 12 + output 40 but total 9352).
• ClaudeAgent builds input_token_count from the Claude Agent SDK ResultMessage.usage["input_tokens"], which is Anthropic's uncached-only field, and computes total_token_count = input + output, so both undercount.

input_token_count is total input for the OpenAI and Gemini clients and is exported as gen_ai.usage.input_tokens, which the OTel GenAI semconv says should include cached tokens.

Description & Review Guide

• Bedrock (_parse_usage): sum cacheReadInputTokens + cacheWriteInputTokens into input_token_count. Cache-specific fields are unchanged.
• Claude (ClaudeAgent): sum cache_creation_input_tokens + cache_read_input_tokens into input_token_count, and derive total_token_count from the inclusive input total. Cache-specific fields are unchanged.
• Updated the two existing unit tests whose expected values now reflect the inclusive input count:
  • test_parse_usage_surfaces_cache_tokens: input_token_count 10 → 21.
  • test_run_captures_result_message_usage_and_finish_reason: input_token_count 42 → 50, total_token_count 60 → 68.

No new tests were added because the existing tests already cover the cache-token paths and their updated assertions verify the fix.

Verification

• python -m pytest python/packages/bedrock/tests/test_bedrock_client.py -q → all pass, including the updated test_parse_usage_surfaces_cache_tokens.
• python -m pytest python/packages/claude/tests/test_claude_agent.py -q → all pass, including the updated test_run_captures_result_message_usage_and_finish_reason.

Related Issue

Fixes #9988

AI Assistance

• No material AI assistance was used.
• This is an AI-assisted contribution. I reviewed, understood, and verified all submitted content and accept responsibility for it.

AI assistance details: locating the two connectors' usage parsing, and drafting the minimal change following the already-merged #9859 pattern. I reproduced the undercount locally and ran the updated tests myself.

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[Copilot]

🟢 Approval recommended

No active review issues were identified in the Bedrock and Claude cache-token accounting changes.

No open issues 🎉

What changed in this PR

Extends the cache-token accounting fix from #9859 to the Bedrock and Claude connectors, addressing #9988 and aligning input usage with other providers.

Changes:

• Include cache read and write/creation tokens in both connectors’ input_token_count, preserving separate cache counters.
• Compute Claude’s total_token_count from the inclusive input count plus output tokens.
• Update existing cache-token tests to assert the corrected counts.

File	Description
python/​packages/​claude/​tests/​test_claude_agent.py	Updates expected input and total counts to include cached tokens.
python/​packages/​claude/​agent_framework_claude/​_agent.py	Includes cache creation and read tokens in input and total usage.
python/​packages/​bedrock/​tests/​test_bedrock_client.py	Updates the expected input count to include cached tokens.
python/​packages/​bedrock/​agent_framework_bedrock/​_chat_client.py	Includes cache read and write tokens in input usage.

_{Review effort: Balanced}