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@github-actions github-actions released this 25 Sep 21:51
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v0.2.0
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Learn about vigilant mode.

First public release of PiG: Pi, the coding agent harness, rebuilt in Go as one native binary. PiG 0.2.0 tracks Pi 0.87.1 (pig --version prints 0.2.0+0.87.1). Read the story: Meet PiG (Pi in Go).

curl -fsSL https://pi-in-go.dev/install.sh | sh        # macOS and Linux
irm https://pi-in-go.dev/install.ps1 | iex             # Windows PowerShell (preview)
npm install -g @pi-in-go/pig                           # npm
go install github.com/MichaelKinsy/PiG/cmd/pig@v0.2.0  # Go

See Install for every method, including update and uninstall.

New Features

  • One native binary — No Node.js needed unless you run TypeScript extensions. In our measurements PiG starts in about 21 ms versus about 300 ms for Pi, with about a quarter of the peak memory. See Quickstart.
  • Pi's extensions run unchanged — TypeScript and JavaScript extensions work as they do in Pi, together in one Node process. See Extensions.
  • Extensions in Go, Rust and Python — Write new extensions with SDKs modeled on Pi's API; each language shares one process, and isolation: strict gives an extension its own. See Extensions.
  • Live /reload — Edit an extension while PiG runs and reload it. A crashed extension is reported and restarted; your session and other extensions keep running. See Slash commands.
  • Piglets — Bundle extensions, skills and prompts into one named agent, and build it into a native binary for your OS and CPU, optionally signed. See Piglets and Piglet Binaries.
  • Windows (preview) — Native Windows builds for x86-64 and Arm64, tested natively. See Windows.

Added

  • Added pig piglet add npm:<package> and git:<repo> to install Piglet sources.
  • Added pig piglet publish --to github to publish signed Piglet Binaries to GitHub Releases, and pig piglet pull to install one against its signed release index.
  • Added Piglet Binary signing (pig piglet build --sign-key) with pig piglet keygen, verify and trust; PiG checks the signature against your trust policy at startup.
  • Added the plan-mode example extension and PowerShell tool event variants in every SDK.
  • Added Pi's model input-limit metadata types to generated and runtime models.
  • Added /angry-pigs to PiG Standard: a full-screen slingshot game built as an ordinary Go extension.
  • Added the model catalogs from the published Pi 0.87.1 package.

Changed

  • Changed terminal capability detection to match Pi (hyperlinks, inline images, true color, 256-color themes, Shift+Enter in Apple Terminal), with settings overrides.
  • Changed the model picker, selector layouts and thinking settings submenu to Pi 0.87.1's.
  • Changed each provider's default model to match Pi's, including Grok 4.7 for xAI.
  • Changed parallel tool batches to run every tool at once, as Pi does, instead of capping concurrency at the CPU count.
  • Changed install telemetry to report to PiG's own endpoint; PI_OFFLINE=1 or enableInstallTelemetry: false turns it off.

Fixed

  • Fixed duplicated tool rows and choppy rendering while tools run.
  • Fixed full-transcript repaints on SIGWINCH without a size change, such as tmux window switches.
  • Fixed Node extensions losing model stream events after a host call returned, and Go SDK extensions hanging on the same race.
  • Fixed image-only user messages being rejected by OpenAI-compatible providers because of an empty text part.
  • Fixed invalid --mode, missing --mode or --name values, and unknown short options to exit with status 1 and Pi's wording.
  • Fixed Codex manual code entry when port 1455 is busy.
  • Fixed text files that start with "GIF" being detected as images.

Known Limitations

  • Windows is a preview: tested natively, with less real-world use than macOS and Linux.
  • The package catalog listing is not in this release; install packages from a known npm or git source.

Downloads and verification

Archives for macOS and Linux (x86-64, Arm64) and Windows (x86-64, Arm64), each built on GitHub Actions from this tag and smoke-tested natively. Verify with shasum -a 256 -c --ignore-missing SHA256SUMS or gh attestation verify <archive> --repo MichaelKinsy/PiG. Each archive also has SPDX and CycloneDX SBOMs, a license inventory and a vulnerability report, covered by EVIDENCE-SHA256SUMS.

Thank you to Mario Zechner and Earendil for Pi. PiG is an independent port; upstream Pi remains the reference implementation. Please open an issue wherever PiG behaves differently from Pi.

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