How to add context management to a Node.js chat API in 2026
Add token counting, sliding window, and summarization compaction to a Node.js chat route to keep conversations coherent without blowing the context budget.
Tag · context-window
Add token counting, sliding window, and summarization compaction to a Node.js chat route to keep conversations coherent without blowing the context budget.
Per-session cost math for 1,000 daily LLM chat sessions at three model tiers. Why stateless APIs compound costs and when sliding-window compaction pays off.
Sliding window, summarization compaction, priority truncation: three Node.js patterns for managing context in long-running LLM conversations.
Six models now claim 1M token contexts. MRCR v2 shows GPT-5.5 at 74% recall at 1M tokens; Gemini 3.5 Flash drops to 26%. Ranked by what they actually use.