Pidevhood

 ‎Pi's minimal system prompt and extensibility let you do actual context engineering. Control what goes into the context window and how it's managed. ‎AGENTS.md: Project instructions loaded at startup from \~/.pi/agent/, parent directories, and the current directory. ‎SYSTEM.md: Replace or append to the default system prompt per-project. ‎Compaction: Auto-summarizes older messages when approaching the context limit. Fully customizable via extensions: implement topic-based compaction, code-aware summaries, or use different summarization models. ‎Skills: Capability packages with instructions and tools, loaded on-demand. Progressive disclosure without busting the prompt cache. See skills. ‎Prompt templates: Reusable prompts as Markdown files. Type /name to expand. See prompt templates. ‎Dynamic context: Extensions can inject messages before each turn, filter the message history, implement RAG, or build long-term memory.