[BUG] cache read/write usage not exported as string when it is zero #971
Description
Checks
- I have updated to the lastest minor and patch version of Strands
- I have checked the documentation and this is not expected behavior
- I have searched ./issues and there are no duplicates of my issue
Strands Version
1.10.0
Python Version
3.12.11
Operating System
macOS 15.7.1
Installation Method
pip
Steps to Reproduce
agent = Agent(
...
model=BedrockModel(
...
cache_prompt="default",
cache_tools="default",
)
)Expected Behavior
{
"gen_ai.usage.prompt_tokens": "177"
"gen_ai.usage.input_tokens": "177"
"gen_ai.usage.completion_tokens": "233"
"gen_ai.usage.output_tokens": "233"
"gen_ai.usage.total_tokens": "9944"
"gen_ai.usage.cache_read_input_tokens": "9534"
"gen_ai.usage.cache_write_input_tokens": "0"
}Actual Behavior
{
"gen_ai.usage.prompt_tokens": "177"
"gen_ai.usage.input_tokens": "177"
"gen_ai.usage.completion_tokens": "233"
"gen_ai.usage.output_tokens": "233"
"gen_ai.usage.total_tokens": "9944"
"gen_ai.usage.cache_read_input_tokens": "9534"
"gen_ai.usage.cache_write_input_tokens": {
intValue: 0
}
}Additional Context
I discovered the issue analyzing the traces with Langfuse:
Possible Solution
No response
Related Issues
No response