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Earendil Pi: Agent Harness & Runtime Monorepo

updated 2026-08-23

Original source: https://github.com/earendil-works/pi SHA256: c15998f046f7fb1520a0765c80fb322fd9ad6b8ecaec818a6ad767677dfad90e

Earendil Pi: Agent Harness & Runtime Monorepo

Repository: https://github.com/earendil-works/pi
Authors: mitsuhiko et al.
Stars: 95.5k | License: Open Source

Monorepo Architecture

  • pi-ai: Unified, multi-provider LLM API abstraction layer.
  • pi-agent-core: Core deterministic runtime engine for agent state loops.
  • pi-coding-agent: Interactive and headless CLI coding assistant.
  • pi-tui: Terminal user interface for live agent steerability.
  • pi-telemetry: High-fidelity event capture and trace telemetry.

Operational & Security Philosophy

  • Containerize, Don’t Permission: No complex in-process permission sandbox. Security is achieved by running the entire harness inside throwaway, boundary-isolated containers.
  • Supply-Chain Hardening: Enforces strict package integrity: pinned dependency trees, mandatory shrinkwrap manifests, --ignore-scripts on installs, and minimum package release age policies.
  • Session Training Corpora: Encourages publishing full coding agent transcripts and interaction trajectories to Hugging Face as open evaluation and fine-tuning datasets.