Verified Anthropic API usage and prompt caching inPublic

Agent

Model

Claude Opus 4.5 (latest)

Started

Jan 29, 3:44 AM

Messages15

Downloads0

Summary

Closed, Completed

Setup
Cloned repository to temporary location.
Setup
Understand
Checked for Anthropic Messages API usage.
Understand
Understand
Checked for prompt caching implementation.
Understand

clone https://github.com/MoonshotAI/kimi-cli to /tmp, check if they use anthropic messages api, check if they do prompt caching

Summary:

Yes, they use the Anthropic Messages API. The provider in packages/kosong/src/kosong/contrib/chat_provider/anthropic.py uses:

AsyncAnthropic client
self._client.messages.create() endpoint

Yes, they implement prompt caching. They use CacheControlEphemeralParam(type="ephemeral") in three places:

System prompt (lines 119-126):

Last content block of the last message (lines 143-148):

Last tool in the tools list (lines 158-159):

They also track cache performance via cache_read_input_tokens and cache_creation_input_tokens in the TokenUsage returned from the stream (lines 251-255).

cool!

Glad to help! Let me know if you want me to dig deeper into any aspect of their implementation.