Pi ships 1.0 agent harness with Codemode, native MCP and cache warming

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Pi is a minimal, extensible agent harness that hundreds of thousands of people use weekly. After months of feedback and hardening, it hits 1.0 and stays small while adding features that have proved useful.

Here's what changed:

• Codemode lets the agent write scripts for tasks, such as summarizing your commit history.
• Native MCP support and non-LLM model support land in the core.
• Virtual-model extensions let you route work, for example planning to Claude Opus and implementation to GPT.
• Pi adds deferred tool loading and Anthropic cache warming.
• System messages can change mid-conversation with awareness of the transcript, and full-screen mode with a new TUI theme is now the default.

There is also Pi Durable, a separate package for building long-running agentic applications beyond the terminal. Both are MIT licensed.

One catch: Pi Durable is experimental.

Try it: curl -fsSL https://pi.dev/install.sh | sh (Windows: powershell -c "irm https://pi.dev/install.ps1 | iex"). For Durable, run npm install @earendil-works/pi-durable @earendil-works/pi-ai @earendil-works/chord. Code: github.com/earendil-works/pi.

Sources: earendil.com