prompt caching

Prompt caching is documented as core feature for persistence and efficiency across sessions

Prompt caching up to 1 hour is a direct implementation of context reuse optimization, enabling cost-effective multi-turn conversations without reprocessing shared context

Prompt Caching is explicitly mentioned and is a core context engineering pattern for session persistence and intelligence compounding

Article identifies prompt caching as the single most important metric for production agents, making it central to context engineering

Article title 'LLM Prompt Caching: The Hidden Lever' directly addresses context window optimization—a core context engineering pattern.

Reveals that prompt caching efficiency is a constraint that should inform architectural decisions about tool integration. Most discussions of prompt caching don't surface this MCP-specific penalty.

Tweet explicitly names 'prompt cache: stable prefix, only session state changes' as critical component 2. This is direct application of prompt caching to preserve context efficiency.

Adds persistence layer to prompt caching—moves cached computations to disk rather than losing them between sessions

Page lists 'Prompt caching' as a sub-topic under Prompt Optimization, indicating IBM recognizes context window management as important.

Summaries and findings are cached so the Insights page loads instantly—cached context is reused across views.