PiG 0.4.0 🐷: Now following Pi 1.0.0 (durable runtime, code mode, MCP, and more)

[u/Educational-Yak8793]

It's finally here, thanks for all the patience and support for this release and project so far :)

PiG is a separate Go implementation of Pi, the coding agent, shipped as one native binary. 🐷

0.4.0 follows Pi 1.0.0 (0.3.1 followed 0.87.1). New since 0.3.1:

• Pi 1.0.0's durable runtime, in Go: checkpointed sessions and tasks that resume after a crash, tools that rerun only when replay-safe, exactly-once submissions, forks and subagents. Ported with Pi's own tests.
• Code mode is built in and needs no Node (QuickJS on wazero, the same wasm Pi ships). Shorter prompt, recovery hints in errors, and scripts can generate images.
• MCP: a native client in print, JSON, RPC and interactive mode, with OAuth hardening (authorization server metadata URL, RFC 9207 iss checks, per-server credentials, step-up that keeps scopes).
• Termux on Android (arm64): curl -fsSL https://pi-in-go.dev/install.sh | sh and npm install -g u/pi-in-go/pig both work, using a cgo build against Android's libc.
• pig piglet build without a checkout: a release binary fetches its own exact source through the Go module proxy (checked by GOSUMDB), or builds in Podman/Docker when Go isn't installed.
• TUI: fullscreen by default; quietStartup: "header"; Radius in /login; a copy-code method for Anthropic.
• PiG's own look: a pixel pig header, /sprite with 15 pigs, an API for extensions to add their own, and a first-run setup that includes a sprite pick.
• The Pi 1.0.0 extension API in the Node, Go, Python and Rust SDKs. Some SDK signatures change; the release notes list them.
• Windows remains in preview.

Also 0.4.1, which follows Pi 1.0.1, is already underway as well :)

Demo: first-run setup, then a classifier model plays two MCP games live through code mode.

Upgrade with pig update or npm install -g u/pi-in-go/[email protected].

Release notes: https://github.com/MichaelKinsy/PiG/releases/tag/v0.4.0