context-window-planner · packages

A TypeScript library providing typed context items, packing strategies, and tokenizer adapters for deciding what to include, summarize, or drop when fitting prompts into LLM context windows. It exports factory functions for six context item primitives (SystemPrompt, ConversationTurn, RAGChunk, ToolSchema, ToolResult, GenerationBuffer), four packing strategies (priority-greedy, sliding-window, summarize-and-replace, RAG relevance), and three tokenizer adapters (OpenAI/tiktoken, Anthropic approximate, mock), all orchestrated through a `ContextPlannerBuilder` class.

A CLI that reads a JSON context-window planning request from stdin and writes a packing plan (included, summarized, and dropped items with token counts) to stdout.