Code 2025
Context Platform Engineering to Reduce Token Anxiety — Val Bercovici, WEKA
Overview
This talk introduces context platform engineering as a method to reduce token anxiety and improve AI agent performance. The core thesis is that by optimizing how context is managed and cached, developers can significantly increase KV cache hit rates, leading to more efficient and cost-effective AI systems. The presenters announce the open-sourcing of their context platform engineering toolkit, designed to help engineers achieve these optimizations.
Who should watch
- AI Engineers
- Product Managers
- Builders working with AI agents
- Those experiencing token rate limits or high inference costs
- Engineers focused on optimizing AI infrastructure and performance
Key takeaways
- KV cache hit rate is identified as the single most important metric for production-grade AI agents.
- Context platform engineering aims to maximize KV cache hit rates, thereby reducing token anxiety and the need for prompt arbitrage.
- The presented toolkit includes a load generator for configuring agent swarms with specific SLOs, deterministic/random prompt cycles, and various model parallelism and memory tiering options.
- Agentic workflows often involve a mismatch between slow human feedback loops and fast agent iteration, leading to significant token consumption, much of which could be cached.
- Token storage is a critical problem, and the way Service Level Agreements (SLAs) for token tiers translate into Service Level Objectives (SLOs) delivered by the context platform is key.
- Optimizing cache hit rates is crucial for both cost savings (for API users) and avoiding rate limits (for subscription users).
- Memory tiering, including options beyond standard DRAM, is essential for holding optimal amounts of cache and achieving high hit rates, especially for longer time-to-live values.
- WEKA has open-sourced its context platform engineering toolkit, available on GitHub, encouraging community contribution and feedback.
Notable quotes
*KV cache hit rates are the single most important metrics for production grade AI agents.*
*Context platform engineering quite simply maximizes KV cache hit rates in a very straightforward manner.*
*We're thrilled to be announcing the open sourcing of this context platform engineering toolkit today.*
Unofficial community note. Prefer the recording for nuance.