context-optimization

Optimize LLM context windows with compaction, masking, KV-cache, and partitioning strategies.

2|Updated Feb 6, 2026
One-click install
npx skills add https://github.com/bcastelino/agent-skills-kit --skill context-optimization-bcastelino
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: context-optimization
Source: https://github.com/bcastelino/agent-skills-kit/tree/main/skills/context-optimization
Command: npx skills add https://github.com/bcastelino/agent-skills-kit --skill context-optimization-bcastelino

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses the limitations of LLM context windows by applying advanced strategies to reduce token usage and improve efficiency, making it possible to handle more complex tasks and longer conversations within budget.

Core Features & Use Cases

  • Compaction: Summarizes context to distill essential information.
  • Observation Masking: Replaces verbose tool outputs with compact references.
  • KV-Cache Optimization: Reuses cached computations to reduce latency and cost.
  • Context Partitioning: Divides work across sub-agents with isolated contexts for complex tasks.
  • Use Case: When dealing with lengthy customer support transcripts, use this skill to summarize past interactions, mask repetitive tool outputs, and partition the conversation to maintain performance and reduce costs.

Quick Start

Apply context compaction and observation masking to the current conversation to reduce token usage.

Frequently Asked Questions about context-optimization

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I reduce token usage in long-running agent systems?

Reduce token usage in long-running agent systems by applying context compaction, observation masking, and context partitioning. These strategies distill essential information, replace verbose tool outputs with compact references, and divide work across isolated sub-agents to maintain performance and lower costs.

What is KV-cache optimization for LLM context windows?

KV-cache optimization for LLM context windows reuses previously cached computations to significantly reduce latency and processing costs. This technique prevents the model from recalculating identical context prefixes, making large document handling and complex agent workflows more efficient.

How can I optimize LLM context for lengthy customer support transcripts?

Optimize LLM context for lengthy customer support transcripts by summarizing past interactions through compaction, masking repetitive tool outputs, and partitioning the conversation across sub-agents. This approach manages context composition and budget to maintain response performance.

Does context partitioning help with large document handling in LLMs?

Yes, context partitioning helps with large document handling in LLMs by dividing complex tasks across sub-agents with isolated contexts. This strategy bypasses strict token limits, improves latency, and ensures the overall context budget is carefully managed across separate processing units.

When should I use observation masking for prompt engineering?

Use observation masking for prompt engineering when dealing with verbose tool outputs that consume excessive context window space. This technique replaces repetitive historical outputs with compact references, freeing up tokens for new information and reducing overall processing costs.

What are the limitations of context compaction in LLM agent workflows?

The limitation of context compaction in LLM agent workflows is the risk of losing granular details when summarizing past interactions. Success requires careful selection of compaction techniques based on the specific context composition and strict budget management to avoid missing critical information.