Struct CacheSafeParams 

pub struct CacheSafeParams {
    pub system_prompt: String,
    pub user_context: HashMap<String, String>,
    pub system_context: HashMap<String, String>,
    pub tool_use_context: Arc<ToolUseContext>,
    pub fork_context_messages: Vec<Message>,
}

Parameters that must be identical between the fork and parent API requests to share the parent’s prompt cache. The Anthropic API cache key is composed of: system prompt, tools, model, messages (prefix), and thinking config.

CacheSafeParams carries the first five. Thinking config is derived from the inherited tool_use_context.options.thinking_config — but can be inadvertently changed if the fork sets max_output_tokens, which clamps budget_tokens in claude.ts (but only for older models that do not use adaptive thinking). See the max_output_tokens doc on ForkedAgentConfig.

Fields

system_prompt: String

System prompt - must match parent for cache hits

user_context: HashMap<String, String>

User context - prepended to messages, affects cache

system_context: HashMap<String, String>

System context - appended to system prompt, affects cache

tool_use_context: Arc<ToolUseContext>

Tool use context containing tools, model, and other options

fork_context_messages: Vec<Message>

Parent context messages for prompt cache sharing

Trait Implementations

impl Clone for CacheSafeParams

fn clone(&self) -> CacheSafeParams

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.